1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* This is the top level of cc1/c++.
22 It parses command args, opens files, invokes the various passes
23 in the proper order, and counts the time used by each.
24 Error messages and low-level interface to malloc also handled here. */
27 #undef FLOAT /* This is for hpux. They should change hpux. */
28 #undef FFS /* Some systems define this in param.h. */
33 #ifdef HAVE_SYS_RESOURCE_H
34 # include <sys/resource.h>
37 #ifdef HAVE_SYS_TIMES_H
38 # include <sys/times.h>
46 #include "insn-attr.h"
47 #include "insn-codes.h"
48 #include "insn-config.h"
56 #include "basic-block.h"
61 #ifdef DWARF_DEBUGGING_INFO
65 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
66 #include "dwarf2out.h"
69 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
73 #ifdef SDB_DEBUGGING_INFO
77 #ifdef XCOFF_DEBUGGING_INFO
82 /* The extra parameters substantially improve the I/O performance. */
84 vms_fopen (fname
, type
)
88 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
89 fixed arguments, which matches ANSI's specification but not VAXCRTL's
90 pre-ANSI implementation. This hack circumvents the mismatch problem. */
91 FILE *(*vmslib_fopen
)() = (FILE *(*)()) fopen
;
94 return (*vmslib_fopen
) (fname
, type
, "mbc=32",
95 "deq=64", "fop=tef", "shr=nil");
97 return (*vmslib_fopen
) (fname
, type
, "mbc=32");
99 #define fopen vms_fopen
102 #ifndef DEFAULT_GDB_EXTENSIONS
103 #define DEFAULT_GDB_EXTENSIONS 1
106 /* If more than one debugging type is supported, you must define
107 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
109 This is one long line cause VAXC can't handle a \-newline. */
110 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
111 #ifndef PREFERRED_DEBUGGING_TYPE
112 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
113 #endif /* no PREFERRED_DEBUGGING_TYPE */
114 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
115 so the following code needn't care. */
116 #ifdef DBX_DEBUGGING_INFO
117 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
119 #ifdef SDB_DEBUGGING_INFO
120 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
122 #ifdef DWARF_DEBUGGING_INFO
123 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
125 #ifdef DWARF2_DEBUGGING_INFO
126 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
128 #ifdef XCOFF_DEBUGGING_INFO
129 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
131 #endif /* More than one debugger format enabled. */
133 /* If still not defined, must have been because no debugging formats
135 #ifndef PREFERRED_DEBUGGING_TYPE
136 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
139 #ifndef DIR_SEPARATOR
140 #define DIR_SEPARATOR '/'
143 #if ! (defined (VMS) || defined (OS2))
144 extern char **environ
;
146 extern char *version_string
;
148 /* Carry information from ASM_DECLARE_OBJECT_NAME
149 to ASM_FINISH_DECLARE_OBJECT. */
151 extern int size_directive_output
;
152 extern tree last_assemble_variable_decl
;
154 static void notice
PVPROTO((const char *s
, ...)) ATTRIBUTE_PRINTF_1
;
155 static void set_target_switch
PROTO((const char *));
156 static const char *decl_name
PROTO((tree
, int));
157 static void vmessage
PROTO((const char *, const char *, va_list));
158 static void v_message_with_file_and_line
PROTO((const char *, int, int,
159 const char *, va_list));
160 static void v_message_with_decl
PROTO((tree
, int, const char *, va_list));
161 static void file_and_line_for_asm
PROTO((rtx
, char **, int *));
162 static void v_error_with_file_and_line
PROTO((const char *, int,
163 const char *, va_list));
164 static void v_error_with_decl
PROTO((tree
, const char *, va_list));
165 static void v_error_for_asm
PROTO((rtx
, const char *, va_list));
166 static void verror
PROTO((const char *, va_list));
167 static void vfatal
PROTO((const char *, va_list)) ATTRIBUTE_NORETURN
;
168 static void v_warning_with_file_and_line
PROTO ((const char *, int,
169 const char *, va_list));
170 static void v_warning_with_decl
PROTO((tree
, const char *, va_list));
171 static void v_warning_for_asm
PROTO((rtx
, const char *, va_list));
172 static void vwarning
PROTO((const char *, va_list));
173 static void vpedwarn
PROTO((const char *, va_list));
174 static void v_pedwarn_with_decl
PROTO((tree
, const char *, va_list));
175 static void v_pedwarn_with_file_and_line
PROTO((const char *, int,
176 const char *, va_list));
177 static void vsorry
PROTO((const char *, va_list));
178 extern void set_fatal_function
PROTO((void (*)(const char *, va_list)));
179 static void float_signal
PROTO((int)) ATTRIBUTE_NORETURN
;
180 static void pipe_closed
PROTO((int)) ATTRIBUTE_NORETURN
;
181 #ifdef ASM_IDENTIFY_LANGUAGE
182 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
183 static void output_lang_identify
PROTO((FILE *)) ATTRIBUTE_UNUSED
;
185 static void open_dump_file
PROTO((const char *, const char *));
186 static void close_dump_file
PROTO((void (*) (FILE *, rtx
), rtx
));
187 static void dump_rtl
PROTO((const char *, tree
, void (*) (FILE *, rtx
), rtx
));
188 static void clean_dump_file
PROTO((const char *));
189 static void compile_file
PROTO((char *));
190 static void display_help
PROTO ((void));
191 static void report_file_and_line
PROTO ((const char *, int, int));
192 static void vnotice
PROTO ((FILE *, const char *, va_list));
193 static void mark_file_stack
PROTO ((void *));
195 static void decode_d_option
PROTO ((const char *));
196 static int decode_f_option
PROTO ((const char *));
197 static int decode_W_option
PROTO ((const char *));
198 static int decode_g_option
PROTO ((const char *));
199 static unsigned independent_decode_option
PROTO ((int, char **, unsigned));
201 static void print_version
PROTO((FILE *, const char *));
202 static int print_single_switch
PROTO((FILE *, int, int, const char *,
203 const char *, const char *,
204 const char *, const char *));
205 static void print_switch_values
PROTO((FILE *, int, int, const char *,
206 const char *, const char *));
208 /* Length of line when printing switch values. */
211 /* Name of program invoked, sans directories. */
213 const char *progname
;
215 /* Copy of arguments to main. */
219 /* Name of current original source file (what was input to cpp).
220 This comes from each #-command in the actual input. */
222 char *input_filename
;
224 /* Name of top-level original source file (what was input to cpp).
225 This comes from the #-command at the beginning of the actual input.
226 If there isn't any there, then this is the cc1 input file name. */
228 char *main_input_filename
;
230 /* Current line number in real source file. */
234 /* Nonzero if it is unsafe to create any new pseudo registers. */
237 /* Stack of currently pending input files. */
239 struct file_stack
*input_file_stack
;
241 /* Incremented on each change to input_file_stack. */
242 int input_file_stack_tick
;
244 /* Name to use as base of names for dump output files. */
246 const char *dump_base_name
;
248 /* Bit flags that specify the machine subtype we are compiling for.
249 Bits are tested using macros TARGET_... defined in the tm.h file
250 and set by `-m...' switches. Must be defined in rtlanal.c. */
252 extern int target_flags
;
254 /* Flags saying which kinds of debugging dump have been requested. */
257 int rtl_dump_and_exit
= 0;
258 int jump_opt_dump
= 0;
259 int addressof_dump
= 0;
264 int branch_prob_dump
= 0;
266 int combine_dump
= 0;
267 int regmove_dump
= 0;
269 int local_reg_dump
= 0;
270 int global_reg_dump
= 0;
272 int peephole2_dump
= 0;
274 int jump2_opt_dump
= 0;
276 int dbr_sched_dump
= 0;
278 int flag_print_asm_name
= 0;
280 int stack_reg_dump
= 0;
282 #ifdef MACHINE_DEPENDENT_REORG
283 int mach_dep_reorg_dump
= 0;
285 static int flag_print_mem
= 0;
286 static int version_flag
= 0;
287 static char * filename
= 0;
288 enum graph_dump_types graph_dump_format
;
290 /* Name for output file of assembly code, specified with -o. */
294 /* Value of the -G xx switch, and whether it was passed or not. */
298 /* Type(s) of debugging information we are producing (if any).
299 See flags.h for the definitions of the different possible
300 types of debugging information. */
301 enum debug_info_type write_symbols
= NO_DEBUG
;
303 /* Level of debugging information we are producing. See flags.h
304 for the definitions of the different possible levels. */
305 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
307 /* Nonzero means use GNU-only extensions in the generated symbolic
308 debugging information. */
309 /* Currently, this only has an effect when write_symbols is set to
310 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
311 int use_gnu_debug_info_extensions
= 0;
313 /* Nonzero means do optimizations. -O.
314 Particular numeric values stand for particular amounts of optimization;
315 thus, -O2 stores 2 here. However, the optimizations beyond the basic
316 ones are not controlled directly by this variable. Instead, they are
317 controlled by individual `flag_...' variables that are defaulted
318 based on this variable. */
322 /* Nonzero means optimize for size. -Os.
323 The only valid values are zero and non-zero. When optimize_size is
324 non-zero, optimize defaults to 2, but certain individual code
325 bloating optimizations are disabled. */
327 int optimize_size
= 0;
329 /* Number of error messages and warning messages so far. */
332 int warningcount
= 0;
335 /* Pointer to function to compute the name to use to print a declaration.
336 DECL is the declaration in question.
337 VERBOSITY determines what information will be printed:
338 0: DECL_NAME, demangled as necessary.
339 1: and scope information.
340 2: and any other information that might be interesting, such as function
341 parameter types in C++. */
343 const char *(*decl_printable_name
) PROTO ((tree
, int));
345 /* Pointer to function to compute rtl for a language-specific tree code. */
347 typedef rtx (*lang_expand_expr_t
)
348 PROTO ((union tree_node
*, rtx
, enum machine_mode
,
349 enum expand_modifier modifier
));
351 lang_expand_expr_t lang_expand_expr
= 0;
353 tree (*lang_expand_constant
) PROTO((tree
)) = 0;
355 /* Pointer to function to finish handling an incomplete decl at the
356 end of compilation. */
358 void (*incomplete_decl_finalize_hook
) PROTO((tree
)) = 0;
360 /* Nonzero if generating code to do profiling. */
362 int profile_flag
= 0;
364 /* Nonzero if generating code to do profiling on a line-by-line basis. */
366 int profile_block_flag
;
368 /* Nonzero if generating code to profile program flow graph arcs. */
370 int profile_arc_flag
= 0;
372 /* Nonzero if generating info for gcov to calculate line test coverage. */
374 int flag_test_coverage
= 0;
376 /* Nonzero indicates that branch taken probabilities should be calculated. */
378 int flag_branch_probabilities
= 0;
380 /* Nonzero for -pedantic switch: warn about anything
381 that standard spec forbids. */
385 /* Temporarily suppress certain warnings.
386 This is set while reading code from a system header file. */
388 int in_system_header
= 0;
390 /* Nonzero means do stupid register allocation.
391 Currently, this is 1 if `optimize' is 0. */
393 int obey_regdecls
= 0;
395 /* Don't print functions as they are compiled and don't print
396 times taken by the various passes. -quiet. */
402 /* Nonzero means `char' should be signed. */
404 int flag_signed_char
;
406 /* Nonzero means give an enum type only as many bytes as it needs. */
408 int flag_short_enums
;
410 /* Nonzero for -fcaller-saves: allocate values in regs that need to
411 be saved across function calls, if that produces overall better code.
412 Optional now, so people can test it. */
414 #ifdef DEFAULT_CALLER_SAVES
415 int flag_caller_saves
= 1;
417 int flag_caller_saves
= 0;
420 /* Nonzero if structures and unions should be returned in memory.
422 This should only be defined if compatibility with another compiler or
423 with an ABI is needed, because it results in slower code. */
425 #ifndef DEFAULT_PCC_STRUCT_RETURN
426 #define DEFAULT_PCC_STRUCT_RETURN 1
429 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
431 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
433 /* Nonzero for -fforce-mem: load memory value into a register
434 before arithmetic on it. This makes better cse but slower compilation. */
436 int flag_force_mem
= 0;
438 /* Nonzero for -fforce-addr: load memory address into a register before
439 reference to memory. This makes better cse but slower compilation. */
441 int flag_force_addr
= 0;
443 /* Nonzero for -fdefer-pop: don't pop args after each function call;
444 instead save them up to pop many calls' args with one insns. */
446 int flag_defer_pop
= 0;
448 /* Nonzero for -ffloat-store: don't allocate floats and doubles
449 in extended-precision registers. */
451 int flag_float_store
= 0;
453 /* Nonzero for -fcse-follow-jumps:
454 have cse follow jumps to do a more extensive job. */
456 int flag_cse_follow_jumps
;
458 /* Nonzero for -fcse-skip-blocks:
459 have cse follow a branch around a block. */
460 int flag_cse_skip_blocks
;
462 /* Nonzero for -fexpensive-optimizations:
463 perform miscellaneous relatively-expensive optimizations. */
464 int flag_expensive_optimizations
;
466 /* Nonzero for -fthread-jumps:
467 have jump optimize output of loop. */
469 int flag_thread_jumps
;
471 /* Nonzero enables strength-reduction in loop.c. */
473 int flag_strength_reduce
= 0;
475 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
476 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
477 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
480 int flag_unroll_loops
;
482 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
483 This is generally not a win. */
485 int flag_unroll_all_loops
;
487 /* Nonzero forces all invariant computations in loops to be moved
490 int flag_move_all_movables
= 0;
492 /* Nonzero forces all general induction variables in loops to be
495 int flag_reduce_all_givs
= 0;
497 /* Nonzero to perform full register move optimization passes. This is the
500 int flag_regmove
= 0;
502 /* Nonzero for -fwritable-strings:
503 store string constants in data segment and don't uniquize them. */
505 int flag_writable_strings
= 0;
507 /* Nonzero means don't put addresses of constant functions in registers.
508 Used for compiling the Unix kernel, where strange substitutions are
509 done on the assembly output. */
511 int flag_no_function_cse
= 0;
513 /* Nonzero for -fomit-frame-pointer:
514 don't make a frame pointer in simple functions that don't require one. */
516 int flag_omit_frame_pointer
= 0;
518 /* Nonzero means place each function into its own section on those platforms
519 which support arbitrary section names and unlimited numbers of sections. */
521 int flag_function_sections
= 0;
523 /* ... and similar for data. */
525 int flag_data_sections
= 0;
527 /* Nonzero to inhibit use of define_optimization peephole opts. */
529 int flag_no_peephole
= 0;
531 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
532 operations in the interest of optimization. For example it allows
533 GCC to assume arguments to sqrt are nonnegative numbers, allowing
534 faster code for sqrt to be generated. */
536 int flag_fast_math
= 0;
538 /* Nonzero means the front end generally wants `errno' maintained by math
539 operations, like built-in SQRT, unless overridden by flag_fast_math. */
541 int flag_errno_math
= 1;
543 /* 0 means straightforward implementation of complex divide acceptable.
544 1 means wide ranges of inputs must work for complex divide.
545 2 means C9X-like requirements for complex divide (not yet implemented). */
547 int flag_complex_divide_method
= 0;
549 /* Nonzero means all references through pointers are volatile. */
553 /* Nonzero means treat all global and extern variables as volatile. */
555 int flag_volatile_global
;
557 /* Nonzero means treat all static variables as volatile. */
559 int flag_volatile_static
;
561 /* Nonzero means just do syntax checking; don't output anything. */
563 int flag_syntax_only
= 0;
565 /* Nonzero means perform global cse. */
567 static int flag_gcse
;
569 /* Nonzero means to use global dataflow analysis to eliminate
570 useless null pointer tests. */
572 static int flag_delete_null_pointer_checks
;
574 /* Nonzero means to rerun cse after loop optimization. This increases
575 compilation time about 20% and picks up a few more common expressions. */
577 static int flag_rerun_cse_after_loop
;
579 /* Nonzero means to run loop optimizations twice. */
581 int flag_rerun_loop_opt
;
583 /* Nonzero for -finline-functions: ok to inline functions that look like
584 good inline candidates. */
586 int flag_inline_functions
;
588 /* Nonzero for -fkeep-inline-functions: even if we make a function
589 go inline everywhere, keep its definition around for debugging
592 int flag_keep_inline_functions
;
594 /* Nonzero means that functions will not be inlined. */
598 /* Nonzero means that we should emit static const variables
599 regardless of whether or not optimization is turned on. */
601 int flag_keep_static_consts
= 1;
603 /* Nonzero means we should be saving declaration info into a .X file. */
605 int flag_gen_aux_info
= 0;
607 /* Specified name of aux-info file. */
609 static char *aux_info_file_name
;
611 /* Nonzero means make the text shared if supported. */
613 int flag_shared_data
;
615 /* Nonzero means schedule into delayed branch slots if supported. */
617 int flag_delayed_branch
;
619 /* Nonzero if we are compiling pure (sharable) code.
620 Value is 1 if we are doing reasonable (i.e. simple
621 offset into offset table) pic. Value is 2 if we can
622 only perform register offsets. */
626 /* Nonzero means generate extra code for exception handling and enable
627 exception handling. */
631 /* Nonzero means use the new model for exception handling. Replaces
632 -DNEW_EH_MODEL as a compile option. */
634 int flag_new_exceptions
= 1;
636 /* Nonzero means generate frame unwind info table when supported */
638 int flag_unwind_tables
= 0;
640 /* Nonzero means don't place uninitialized global data in common storage
645 /* Nonzero means pretend it is OK to examine bits of target floats,
646 even if that isn't true. The resulting code will have incorrect constants,
647 but the same series of instructions that the native compiler would make. */
649 int flag_pretend_float
;
651 /* Nonzero means change certain warnings into errors.
652 Usually these are warnings about failure to conform to some standard. */
654 int flag_pedantic_errors
= 0;
656 /* flag_schedule_insns means schedule insns within basic blocks (before
658 flag_schedule_insns_after_reload means schedule insns after
661 int flag_schedule_insns
= 0;
662 int flag_schedule_insns_after_reload
= 0;
664 /* The following flags have effect only for scheduling before register
667 flag_schedule_interblock means schedule insns accross basic blocks.
668 flag_schedule_speculative means allow speculative motion of non-load insns.
669 flag_schedule_speculative_load means allow speculative motion of some
671 flag_schedule_speculative_load_dangerous allows speculative motion of more
674 int flag_schedule_interblock
= 1;
675 int flag_schedule_speculative
= 1;
676 int flag_schedule_speculative_load
= 0;
677 int flag_schedule_speculative_load_dangerous
= 0;
679 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
680 by a cheaper branch, on a count register. */
681 int flag_branch_on_count_reg
;
683 /* -finhibit-size-directive inhibits output of .size for ELF.
684 This is used only for compiling crtstuff.c,
685 and it may be extended to other effects
686 needed for crtstuff.c on other systems. */
687 int flag_inhibit_size_directive
= 0;
689 /* -fverbose-asm causes extra commentary information to be produced in
690 the generated assembly code (to make it more readable). This option
691 is generally only of use to those who actually need to read the
692 generated assembly code (perhaps while debugging the compiler itself).
693 -fno-verbose-asm, the default, causes the extra information
694 to be omitted and is useful when comparing two assembler files. */
696 int flag_verbose_asm
= 0;
698 /* -dA causes debug commentary information to be produced in
699 the generated assembly code (to make it more readable). This option
700 is generally only of use to those who actually need to read the
701 generated assembly code (perhaps while debugging the compiler itself).
702 Currently, this switch is only used by dwarfout.c; however, it is intended
703 to be a catchall for printing debug information in the assembler file. */
705 int flag_debug_asm
= 0;
707 /* -fgnu-linker specifies use of the GNU linker for initializations.
708 (Or, more generally, a linker that handles initializations.)
709 -fno-gnu-linker says that collect2 will be used. */
711 int flag_gnu_linker
= 0;
713 int flag_gnu_linker
= 1;
716 /* Tag all structures with __attribute__(packed) */
717 int flag_pack_struct
= 0;
719 /* Emit code to check for stack overflow; also may cause large objects
720 to be allocated dynamically. */
721 int flag_stack_check
;
723 /* -fcheck-memory-usage causes extra code to be generated in order to check
724 memory accesses. This is used by a detector of bad memory accesses such
726 int flag_check_memory_usage
= 0;
728 /* -fprefix-function-name causes function name to be prefixed. This
729 can be used with -fcheck-memory-usage to isolate code compiled with
730 -fcheck-memory-usage. */
731 int flag_prefix_function_name
= 0;
733 /* 0 if pointer arguments may alias each other. True in C.
734 1 if pointer arguments may not alias each other but may alias
736 2 if pointer arguments may not alias each other and may not
737 alias global variables. True in Fortran.
738 This defaults to 0 for C. */
739 int flag_argument_noalias
= 0;
741 /* Nonzero if we should do (language-dependent) alias analysis.
742 Typically, this analysis will assume that expressions of certain
743 types do not alias expressions of certain other types. Only used
744 if alias analysis (in general) is enabled. */
745 int flag_strict_aliasing
= 0;
747 /* Instrument functions with calls at entry and exit, for profiling. */
748 int flag_instrument_function_entry_exit
= 0;
750 /* Nonzero means ignore `#ident' directives. 0 means handle them.
751 On SVR4 targets, it also controls whether or not to emit a
752 string identifying the compiler. */
754 int flag_no_ident
= 0;
756 /* This will perform a peephole pass before sched2. */
757 int flag_peephole2
= 0;
759 /* -fbounded-pointers causes gcc to compile pointers as composite
760 objects occupying three words: the pointer value, the base address
761 of the referent object, and the address immediately beyond the end
762 of the referent object. The base and extent allow us to perform
763 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
764 int flag_bounded_pointers
= 0;
766 /* -fcheck-bounds causes gcc to generate array bounds checks.
767 For C, C++: defaults to value of flag_bounded_pointers.
768 For ObjC: defaults to off.
769 For Java: defaults to on.
770 For Fortran: defaults to off.
771 For CHILL: defaults to off. */
772 int flag_bounds_check
= 0;
774 /* Values of the -falign-* flags: how much to align labels in code.
775 0 means `use default', 1 means `don't align'.
776 For each variable, there is an _log variant which is the power
777 of two not less than the variable, for .align output. */
784 int align_labels_log
;
786 int align_functions_log
;
788 /* Table of supported debugging formats. */
792 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
793 constant expression, we use NO_DEBUG in its place. */
794 enum debug_info_type debug_type
;
795 int use_extensions_p
;
796 const char * description
;
800 { "", NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
,
801 "Generate default debug format output" },
802 { "gdb", NO_DEBUG
, 1, "Generate default extended debug format output" },
803 #ifdef DBX_DEBUGGING_INFO
804 { "stabs", DBX_DEBUG
, 0, "Generate STABS format debug output" },
805 { "stabs+", DBX_DEBUG
, 1, "Generate extended STABS format debug output" },
807 #ifdef DWARF_DEBUGGING_INFO
808 { "dwarf", DWARF_DEBUG
, 0, "Generate DWARF-1 format debug output"},
809 { "dwarf+", DWARF_DEBUG
, 1,
810 "Generated extended DWARF-1 format debug output" },
812 #ifdef DWARF2_DEBUGGING_INFO
813 { "dwarf-2", DWARF2_DEBUG
, 0, "Enable DWARF-2 debug output" },
815 #ifdef XCOFF_DEBUGGING_INFO
816 { "xcoff", XCOFF_DEBUG
, 0, "Generate XCOFF format debug output" },
817 { "xcoff+", XCOFF_DEBUG
, 1, "Generate extended XCOFF format debug output" },
819 #ifdef SDB_DEBUGGING_INFO
820 { "coff", SDB_DEBUG
, 0, "Generate COFF format debug output" },
830 const char * description
;
832 lang_independent_options
;
834 /* Add or remove a leading underscore from user symbols. */
835 int flag_leading_underscore
= -1;
837 /* The user symbol prefix after having resolved same. */
838 const char *user_label_prefix
;
840 /* A default for same. */
841 #ifndef USER_LABEL_PREFIX
842 #define USER_LABEL_PREFIX ""
845 /* Table of language-independent -f options.
846 STRING is the option name. VARIABLE is the address of the variable.
847 ON_VALUE is the value to store in VARIABLE
848 if `-fSTRING' is seen as an option.
849 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
851 lang_independent_options f_options
[] =
853 {"float-store", &flag_float_store
, 1,
854 "Do not store floats in registers" },
855 {"volatile", &flag_volatile
, 1,
856 "Consider all mem refs through pointers as volatile"},
857 {"volatile-global", &flag_volatile_global
, 1,
858 "Consider all mem refs to global data to be volatile" },
859 {"volatile-static", &flag_volatile_static
, 1,
860 "Consider all mem refs to static data to be volatile" },
861 {"defer-pop", &flag_defer_pop
, 1,
862 "Defer popping functions args from stack until later" },
863 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1,
864 "When possible do not generate stack frames"},
865 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1,
866 "When running CSE, follow jumps to their targets" },
867 {"cse-skip-blocks", &flag_cse_skip_blocks
, 1,
868 "When running CSE, follow conditional jumps" },
869 {"expensive-optimizations", &flag_expensive_optimizations
, 1,
870 "Perform a number of minor, expensive optimisations" },
871 {"thread-jumps", &flag_thread_jumps
, 1,
872 "Perform jump threading optimisations"},
873 {"strength-reduce", &flag_strength_reduce
, 1,
874 "Perform strength reduction optimisations" },
875 {"unroll-loops", &flag_unroll_loops
, 1,
876 "Perform loop unrolling when iteration count is known" },
877 {"unroll-all-loops", &flag_unroll_all_loops
, 1,
878 "Perform loop unrolling for all loops" },
879 {"move-all-movables", &flag_move_all_movables
, 1,
880 "Force all loop invariant computations out of loops" },
881 {"reduce-all-givs", &flag_reduce_all_givs
, 1,
882 "Strength reduce all loop general induction variables" },
883 {"writable-strings", &flag_writable_strings
, 1,
884 "Store strings in writable data section" },
885 {"peephole", &flag_no_peephole
, 0,
886 "Enable machine specific peephole optimisations" },
887 {"force-mem", &flag_force_mem
, 1,
888 "Copy memory operands into registers before using" },
889 {"force-addr", &flag_force_addr
, 1,
890 "Copy memory address constants into regs before using" },
891 {"function-cse", &flag_no_function_cse
, 0,
892 "Allow function addresses to be held in registers" },
893 {"inline-functions", &flag_inline_functions
, 1,
894 "Integrate simple functions into their callers" },
895 {"keep-inline-functions", &flag_keep_inline_functions
, 1,
896 "Generate code for funcs even if they are fully inlined" },
897 {"inline", &flag_no_inline
, 0,
898 "Pay attention to the 'inline' keyword"},
899 {"keep-static-consts", &flag_keep_static_consts
, 1,
900 "Emit static const variables even if they are not used" },
901 {"syntax-only", &flag_syntax_only
, 1,
902 "Check for syntax errors, then stop" },
903 {"shared-data", &flag_shared_data
, 1,
904 "Mark data as shared rather than private" },
905 {"caller-saves", &flag_caller_saves
, 1,
906 "Enable saving registers around function calls" },
907 {"pcc-struct-return", &flag_pcc_struct_return
, 1,
908 "Return 'short' aggregates in memory, not registers" },
909 {"reg-struct-return", &flag_pcc_struct_return
, 0,
910 "Return 'short' aggregates in registers" },
911 {"delayed-branch", &flag_delayed_branch
, 1,
912 "Attempt to fill delay slots of branch instructions" },
913 {"gcse", &flag_gcse
, 1,
914 "Perform the global common subexpression elimination" },
915 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1,
916 "Run CSE pass after loop optimisations"},
917 {"rerun-loop-opt", &flag_rerun_loop_opt
, 1,
918 "Run the loop optimiser twice"},
919 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks
, 1,
920 "Delete useless null pointer checks" },
921 {"pretend-float", &flag_pretend_float
, 1,
922 "Pretend that host and target use the same FP format"},
923 {"schedule-insns", &flag_schedule_insns
, 1,
924 "Reschedule instructions to avoid pipeline stalls"},
925 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1,
926 "Run two passes of the instruction scheduler"},
927 {"sched-interblock",&flag_schedule_interblock
, 1,
928 "Enable scheduling across basic blocks" },
929 {"sched-spec",&flag_schedule_speculative
, 1,
930 "Allow speculative motion of non-loads" },
931 {"sched-spec-load",&flag_schedule_speculative_load
, 1,
932 "Allow speculative motion of some loads" },
933 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous
, 1,
934 "Allow speculative motion of more loads" },
935 {"branch-count-reg",&flag_branch_on_count_reg
, 1,
936 "Replace add,compare,branch with branch on count reg"},
937 {"pic", &flag_pic
, 1,
938 "Generate position independent code, if possible"},
939 {"PIC", &flag_pic
, 2, ""},
940 {"exceptions", &flag_exceptions
, 1,
941 "Enable exception handling" },
942 {"new-exceptions", &flag_new_exceptions
, 1,
943 "Use the new model for exception handling" },
944 {"unwind-tables", &flag_unwind_tables
, 1,
945 "Just generate unwind tables for exception handling" },
946 {"sjlj-exceptions", &exceptions_via_longjmp
, 1,
947 "Use setjmp/longjmp to handle exceptions" },
948 {"asynchronous-exceptions", &asynchronous_exceptions
, 1,
949 "Support asynchronous exceptions" },
950 {"profile-arcs", &profile_arc_flag
, 1,
951 "Insert arc based program profiling code" },
952 {"test-coverage", &flag_test_coverage
, 1,
953 "Create data files needed by gcov" },
954 {"branch-probabilities", &flag_branch_probabilities
, 1,
955 "Use profiling information for branch probabilities" },
956 {"fast-math", &flag_fast_math
, 1,
957 "Improve FP speed by violating ANSI & IEEE rules" },
958 {"common", &flag_no_common
, 0,
959 "Do not put unitialised globals in the common section" },
960 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1,
961 "Do not generate .size directives" },
962 {"function-sections", &flag_function_sections
, 1,
963 "place each function into its own section" },
964 {"data-sections", &flag_data_sections
, 1,
965 "place data items into their own section" },
966 {"verbose-asm", &flag_verbose_asm
, 1,
967 "Add extra commentry to assembler output"},
968 {"gnu-linker", &flag_gnu_linker
, 1,
969 "Output GNU ld formatted global initialisers"},
970 {"regmove", &flag_regmove
, 1,
971 "Enables a register move optimisation"},
972 {"optimize-register-move", &flag_regmove
, 1,
973 "Do the full regmove optimization pass"},
974 {"pack-struct", &flag_pack_struct
, 1,
975 "Pack structure members together without holes" },
976 {"stack-check", &flag_stack_check
, 1,
977 "Insert stack checking code into the program" },
978 {"argument-alias", &flag_argument_noalias
, 0,
979 "Specify that arguments may alias each other & globals"},
980 {"argument-noalias", &flag_argument_noalias
, 1,
981 "Assume arguments may alias globals but not each other"},
982 {"argument-noalias-global", &flag_argument_noalias
, 2,
983 "Assume arguments do not alias each other or globals" },
984 {"strict-aliasing", &flag_strict_aliasing
, 1,
985 "Assume strict aliasing rules apply" },
986 {"align-loops", &align_loops
, 0,
987 "Align the start of loops" },
988 {"align-jumps", &align_jumps
, 0,
989 "Align labels which are only reached by jumping" },
990 {"align-labels", &align_labels
, 0,
991 "Align all labels" },
992 {"align-functions", &align_functions
, 0,
993 "Align the start of functions" },
994 {"check-memory-usage", &flag_check_memory_usage
, 1,
995 "Generate code to check every memory access" },
996 {"prefix-function-name", &flag_prefix_function_name
, 1,
997 "Add a prefix to all function names" },
998 {"dump-unnumbered", &flag_dump_unnumbered
, 1,
999 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1000 {"instrument-functions", &flag_instrument_function_entry_exit
, 1,
1001 "Instrument function entry/exit with profiling calls"},
1002 {"leading-underscore", &flag_leading_underscore
, 1,
1003 "External symbols have a leading underscore" },
1004 {"ident", &flag_no_ident
, 0,
1005 "Process #ident directives"},
1006 { "peephole2", &flag_peephole2
, 1,
1007 "Enables an rtl peephole pass run before sched2" },
1008 {"math-errno", &flag_errno_math
, 1,
1009 "Set errno after built-in math functions"},
1010 {"bounded-pointers", &flag_bounded_pointers
, 1,
1011 "Compile pointers as triples: value, base & end" },
1012 {"bounds-check", &flag_bounds_check
, 1,
1013 "Generate code to check bounds before dereferencing pointers and arrays" }
1016 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1018 /* Table of language-specific options. */
1020 static struct lang_opt
1022 const char * option
;
1023 const char * description
;
1025 documented_lang_options
[] =
1027 /* In order not to overload the --help output, the convention
1028 used here is to only describe those options which are not
1029 enabled by default. */
1031 { "-ansi", "Compile just for ANSI C" },
1032 { "-fallow-single-precision",
1033 "Do not promote floats to double if using -traditional" },
1034 { "-std= ", "Determine language standard"},
1036 { "-fsigned-bitfields", "" },
1037 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1038 { "-fno-signed-bitfields", "" },
1039 { "-fno-unsigned-bitfields","" },
1040 { "-fsigned-char", "Make 'char' be signed by default"},
1041 { "-funsigned-char", "Make 'char' be unsigned by default"},
1042 { "-fno-signed-char", "" },
1043 { "-fno-unsigned-char", "" },
1045 { "-ftraditional", "" },
1046 { "-traditional", "Attempt to support traditional K&R style C"},
1047 { "-fnotraditional", "" },
1048 { "-fno-traditional", "" },
1051 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1052 { "-fbuiltin", "" },
1053 { "-fno-builtin", "Do not recognise any built in functions" },
1054 { "-fhosted", "Assume normal C execution environment" },
1055 { "-fno-hosted", "" },
1057 "Assume that standard libraries & main might not exist" },
1058 { "-fno-freestanding", "" },
1059 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1060 { "-fno-cond-mismatch", "" },
1061 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1062 { "-fno-dollars-in-identifiers", "" },
1063 { "-fpreprocessed", "" },
1064 { "-fno-preprocessed", "" },
1065 { "-fshort-double", "Use the same size for double as for float" },
1066 { "-fno-short-double", "" },
1067 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1068 { "-fno-short-enums", "" },
1069 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1070 { "-fno-short-wchar", "" },
1072 { "-Wall", "Enable most warning messages" },
1073 { "-Wbad-function-cast",
1074 "Warn about casting functions to incompatible types" },
1075 { "-Wno-bad-function-cast", "" },
1076 { "-Wmissing-noreturn",
1077 "Warn about functions which might be candidates for attribute noreturn" },
1078 { "-Wno-missing-noreturn", "" },
1079 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1080 { "-Wno-cast-qual", "" },
1081 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1082 { "-Wno-char-subscripts", "" },
1083 { "-Wcomment", "Warn if nested comments are detected" },
1084 { "-Wno-comment", "" },
1085 { "-Wcomments", "Warn if nested comments are detected" },
1086 { "-Wno-comments", "" },
1087 { "-Wconversion", "Warn about possibly confusing type conversions" },
1088 { "-Wno-conversion", "" },
1089 { "-Wformat", "Warn about printf format anomalies" },
1090 { "-Wno-format", "" },
1091 { "-Wimplicit-function-declaration",
1092 "Warn about implicit function declarations" },
1093 { "-Wno-implicit-function-declaration", "" },
1094 { "-Werror-implicit-function-declaration", "" },
1095 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1096 { "-Wno-implicit-int", "" },
1097 { "-Wimplicit", "" },
1098 { "-Wno-implicit", "" },
1099 { "-Wimport", "Warn about the use of the #import directive" },
1100 { "-Wno-import", "" },
1101 { "-Wlong-long","" },
1102 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1103 { "-Wmain", "Warn about suspicious declarations of main" },
1104 { "-Wno-main", "" },
1105 { "-Wmissing-braces",
1106 "Warn about possibly missing braces around initialisers" },
1107 { "-Wno-missing-braces", "" },
1108 { "-Wmissing-declarations",
1109 "Warn about global funcs without previous declarations"},
1110 { "-Wno-missing-declarations", "" },
1111 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1112 { "-Wno-missing-prototypes", "" },
1113 { "-Wmultichar", "Warn about use of multicharacter literals"},
1114 { "-Wno-multichar", "" },
1115 { "-Wnested-externs", "Warn about externs not at file scope level" },
1116 { "-Wno-nested-externs", "" },
1117 { "-Wparentheses", "Warn about possible missing parentheses" },
1118 { "-Wno-parentheses", "" },
1119 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1120 { "-Wno-pointer-arith", "" },
1121 { "-Wredundant-decls",
1122 "Warn about multiple declarations of the same object" },
1123 { "-Wno-redundant-decls", "" },
1124 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1125 { "-Wno-sign-compare", "" },
1126 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1127 { "-Wno-float-equal", "" },
1128 { "-Wunknown-pragmas", "Warn about unrecognised pragmas" },
1129 { "-Wno-unknown-pragmas", "" },
1130 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1131 { "-Wno-strict-prototypes", "" },
1132 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1133 { "-Wno-traditional", "" },
1134 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1135 { "-Wno-trigraphs", "" },
1137 { "-Wno-undef", "" },
1138 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1139 { "-Wno-write-strings", "" },
1141 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1143 /* These are for Objective C. */
1144 DEFINE_LANG_NAME ("Objective C")
1146 { "-lang-objc", "" },
1147 { "-gen-decls", "Dump decls to a .decl file" },
1148 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1149 { "-fno-gnu-runtime", "" },
1150 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1151 { "-fno-next-runtime", "" },
1152 { "-Wselector", "Warn if a selector has multiple methods" },
1153 { "-Wno-selector", "" },
1154 { "-Wprotocol", "" },
1155 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1156 { "-print-objc-runtime-info",
1157 "Generate C header of platform specific features" },
1159 #include "options.h"
1163 /* Here is a table, controlled by the tm.h file, listing each -m switch
1164 and which bits in `target_switches' it should set or clear.
1165 If VALUE is positive, it is bits to set.
1166 If VALUE is negative, -VALUE is bits to clear.
1167 (The sign bit is not used so there is no confusion.) */
1173 const char * description
;
1175 target_switches
[] = TARGET_SWITCHES
;
1177 /* This table is similar, but allows the switch to have a value. */
1179 #ifdef TARGET_OPTIONS
1182 const char * prefix
;
1183 const char ** variable
;
1184 const char * description
;
1186 target_options
[] = TARGET_OPTIONS
;
1189 /* Options controlling warnings */
1191 /* Don't print warning messages. -w. */
1193 int inhibit_warnings
= 0;
1195 /* Print various extra warnings. -W. */
1197 int extra_warnings
= 0;
1199 /* Treat warnings as errors. -Werror. */
1201 int warnings_are_errors
= 0;
1203 /* Nonzero to warn about unused local variables. */
1207 /* Nonzero to warn about code which is never reached. */
1209 int warn_notreached
;
1211 /* Nonzero to warn about variables used before they are initialized. */
1213 int warn_uninitialized
;
1215 /* Nonzero means warn about all declarations which shadow others. */
1219 /* Warn if a switch on an enum fails to have a case for every enum value. */
1223 /* Nonzero means warn about function definitions that default the return type
1224 or that use a null return and have a return-type other than void. */
1226 int warn_return_type
;
1228 /* Nonzero means warn about pointer casts that increase the required
1229 alignment of the target type (and might therefore lead to a crash
1230 due to a misaligned access). */
1232 int warn_cast_align
;
1234 /* Nonzero means warn about any identifiers that match in the first N
1235 characters. The value N is in `id_clash_len'. */
1238 unsigned id_clash_len
;
1240 /* Nonzero means warn about any objects definitions whose size is larger
1241 than N bytes. Also want about function definitions whose returned
1242 values are larger than N bytes. The value N is in `larger_than_size'. */
1244 int warn_larger_than
;
1245 unsigned larger_than_size
;
1247 /* Nonzero means warn if inline function is too large. */
1251 /* Warn if a function returns an aggregate,
1252 since there are often incompatible calling conventions for doing this. */
1254 int warn_aggregate_return
;
1256 /* Likewise for -W. */
1258 lang_independent_options W_options
[] =
1260 {"unused", &warn_unused
, 1, "Warn when a variable is unused" },
1261 {"error", &warnings_are_errors
, 1, ""},
1262 {"shadow", &warn_shadow
, 1, "Warn when one local variable shadows another" },
1263 {"switch", &warn_switch
, 1,
1264 "Warn about enumerated switches missing a specific case" },
1265 {"aggregate-return", &warn_aggregate_return
, 1,
1266 "Warn about returning structures, unions or arrays" },
1267 {"cast-align", &warn_cast_align
, 1,
1268 "Warn about pointer casts which increase alignment" },
1269 {"unreachable-code", &warn_notreached
, 1,
1270 "Warn about code that will never be executed" },
1271 {"uninitialized", &warn_uninitialized
, 1,
1272 "Warn about unitialized automatic variables"},
1273 {"inline", &warn_inline
, 1,
1274 "Warn when an inlined function cannot be inlined"}
1277 /* Output files for assembler code (real compiler output)
1278 and debugging dumps. */
1281 FILE *aux_info_file
;
1282 FILE *rtl_dump_file
= NULL
;
1284 /* Decode the string P as an integral parameter.
1285 If the string is indeed an integer return its numeric value else
1286 issue an Invalid Option error for the option PNAME and return DEFVAL.
1287 If PNAME is zero just return DEFVAL, do not call error. */
1290 read_integral_parameter (p
, pname
, defval
)
1295 const char *endp
= p
;
1299 if (*endp
>= '0' && *endp
<= '9')
1308 error ("Invalid option `%s'", pname
);
1316 /* Time accumulators, to count the total time spent in various passes. */
1320 int integration_time
;
1326 int branch_prob_time
;
1331 int local_alloc_time
;
1332 int global_alloc_time
;
1337 int shorten_branch_time
;
1345 /* Return time used so far, in microseconds. */
1355 #else /* not BeOS */
1356 #if defined (_WIN32) && !defined (__CYGWIN__)
1360 return (clock() * 1000);
1361 #else /* not _WIN32 */
1367 tick
= 1000000 / sysconf(_SC_CLK_TCK
);
1369 return (tms
.tms_utime
+ tms
.tms_stime
) * tick
;
1375 # if HAVE_SYSCONF && defined _SC_CLK_TCK
1376 # define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
1379 # define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
1381 # define TICKS_PER_SECOND HZ /* traditional UNIX */
1385 return (tms
.tms_utime
+ tms
.tms_stime
) * (1000000 / TICKS_PER_SECOND
);
1390 struct rusage rusage
;
1391 getrusage (0, &rusage
);
1392 return (rusage
.ru_utime
.tv_sec
* 1000000 + rusage
.ru_utime
.tv_usec
1393 + rusage
.ru_stime
.tv_sec
* 1000000 + rusage
.ru_stime
.tv_usec
);
1400 int proc_system_time
;
1401 int child_user_time
;
1402 int child_system_time
;
1404 times ((void *) &vms_times
);
1405 return (vms_times
.proc_user_time
+ vms_times
.proc_system_time
) * 10000;
1409 #endif /* _SC_CLK_TCK */
1411 #endif /* __BEOS__ */
1414 #define TIMEVAR(VAR, BODY) \
1415 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
1418 print_time (str
, total
)
1423 "time in %s: %d.%06d (%.0f%%)\n",
1424 str
, total
/ 1000000, total
% 1000000,
1425 (double)total
/ (double)all_time
* 100.0);
1428 /* Count an error or warning. Return 1 if the message should be printed. */
1431 count_error (warningp
)
1434 if (warningp
&& inhibit_warnings
)
1437 if (warningp
&& !warnings_are_errors
)
1441 static int warning_message
= 0;
1443 if (warningp
&& !warning_message
)
1445 notice ("%s: warnings being treated as errors\n", progname
);
1446 warning_message
= 1;
1454 /* Print a fatal error message. NAME is the text.
1455 Also include a system error message based on `errno'. */
1458 pfatal_with_name (name
)
1461 fprintf (stderr
, "%s: ", progname
);
1463 exit (FATAL_EXIT_CODE
);
1467 fatal_io_error (name
)
1470 notice ("%s: %s: I/O error\n", progname
, name
);
1471 exit (FATAL_EXIT_CODE
);
1474 /* This is the default decl_printable_name function. */
1477 decl_name (decl
, verbosity
)
1479 int verbosity ATTRIBUTE_UNUSED
;
1481 return IDENTIFIER_POINTER (DECL_NAME (decl
));
1484 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1489 struct file_stack
*stack
= *(struct file_stack
**)p
;
1491 /* We're only called for input_file_stack, so we can mark the current
1492 input_filename here as well. */
1493 ggc_mark_string (main_input_filename
);
1494 ggc_mark_string (input_filename
);
1498 ggc_mark_string (stack
->name
);
1499 stack
= stack
->next
;
1503 static int need_error_newline
;
1505 /* Function of last error message;
1506 more generally, function such that if next error message is in it
1507 then we don't have to mention the function name. */
1508 static tree last_error_function
= NULL
;
1510 /* Used to detect when input_file_stack has changed since last described. */
1511 static int last_error_tick
;
1513 /* Called when the start of a function definition is parsed,
1514 this function prints on stderr the name of the function. */
1517 announce_function (decl
)
1522 if (rtl_dump_and_exit
)
1523 fprintf (stderr
, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
1525 fprintf (stderr
, " %s", (*decl_printable_name
) (decl
, 2));
1527 need_error_newline
= 1;
1528 last_error_function
= current_function_decl
;
1532 /* The default function to print out name of current function that caused
1536 default_print_error_function (file
)
1539 if (last_error_function
!= current_function_decl
)
1542 fprintf (stderr
, "%s: ", file
);
1544 if (current_function_decl
== NULL
)
1545 notice ("At top level:\n");
1547 notice ((TREE_CODE (TREE_TYPE (current_function_decl
)) == METHOD_TYPE
1548 ? "In method `%s':\n"
1549 : "In function `%s':\n"),
1550 (*decl_printable_name
) (current_function_decl
, 2));
1552 last_error_function
= current_function_decl
;
1556 /* Called by report_error_function to print out function name.
1557 * Default may be overridden by language front-ends. */
1559 void (*print_error_function
) PROTO((const char *)) =
1560 default_print_error_function
;
1562 /* Prints out, if necessary, the name of the current function
1563 that caused an error. Called from all error and warning functions.
1564 We ignore the FILE parameter, as it cannot be relied upon. */
1567 report_error_function (file
)
1568 const char *file ATTRIBUTE_UNUSED
;
1570 struct file_stack
*p
;
1572 if (need_error_newline
)
1574 fprintf (stderr
, "\n");
1575 need_error_newline
= 0;
1578 if (input_file_stack
&& input_file_stack
->next
!= 0
1579 && input_file_stack_tick
!= last_error_tick
)
1581 for (p
= input_file_stack
->next
; p
; p
= p
->next
)
1582 notice ((p
== input_file_stack
->next
1583 ? "In file included from %s:%d"
1584 : ",\n from %s:%d"),
1586 fprintf (stderr
, ":\n");
1587 last_error_tick
= input_file_stack_tick
;
1590 (*print_error_function
) (input_filename
);
1593 /* Print a message. */
1596 vnotice (file
, msgid
, ap
)
1601 vfprintf (file
, _(msgid
), ap
);
1605 notice
VPROTO((const char *msgid
, ...))
1607 #ifndef ANSI_PROTOTYPES
1612 VA_START (ap
, msgid
);
1614 #ifndef ANSI_PROTOTYPES
1615 msgid
= va_arg (ap
, char *);
1618 vnotice (stderr
, msgid
, ap
);
1623 fnotice
VPROTO((FILE *file
, const char *msgid
, ...))
1625 #ifndef ANSI_PROTOTYPES
1631 VA_START (ap
, msgid
);
1633 #ifndef ANSI_PROTOTYPES
1634 file
= va_arg (ap
, FILE *);
1635 msgid
= va_arg (ap
, const char *);
1638 vnotice (file
, msgid
, ap
);
1642 /* Report FILE and LINE (or program name), and optionally just WARN. */
1645 report_file_and_line (file
, line
, warn
)
1651 fprintf (stderr
, "%s:%d: ", file
, line
);
1653 fprintf (stderr
, "%s: ", progname
);
1656 notice ("warning: ");
1659 /* Print a message. */
1662 vmessage (prefix
, msgid
, ap
)
1668 fprintf (stderr
, "%s: ", prefix
);
1670 vfprintf (stderr
, msgid
, ap
);
1673 /* Print a message relevant to line LINE of file FILE. */
1676 v_message_with_file_and_line (file
, line
, warn
, msgid
, ap
)
1683 report_file_and_line (file
, line
, warn
);
1684 vnotice (stderr
, msgid
, ap
);
1685 fputc ('\n', stderr
);
1688 /* Print a message relevant to the given DECL. */
1691 v_message_with_decl (decl
, warn
, msgid
, ap
)
1699 report_file_and_line (DECL_SOURCE_FILE (decl
),
1700 DECL_SOURCE_LINE (decl
), warn
);
1702 /* Do magic to get around lack of varargs support for insertion
1703 of arguments into existing list. We know that the decl is first;
1704 we ass_u_me that it will be printed with "%s". */
1706 for (p
= _(msgid
); *p
; ++p
)
1710 if (*(p
+ 1) == '%')
1712 else if (*(p
+ 1) != 's')
1719 if (p
> _(msgid
)) /* Print the left-hand substring. */
1721 char fmt
[sizeof "%.255s"];
1722 long width
= p
- _(msgid
);
1724 if (width
> 255L) width
= 255L; /* arbitrary */
1725 sprintf (fmt
, "%%.%lds", width
);
1726 fprintf (stderr
, fmt
, _(msgid
));
1729 if (*p
== '%') /* Print the name. */
1731 const char *n
= (DECL_NAME (decl
)
1732 ? (*decl_printable_name
) (decl
, 2)
1738 if (ISALPHA (*(p
- 1) & 0xFF))
1743 if (*p
) /* Print the rest of the message. */
1744 vmessage ((char *)NULL
, p
, ap
);
1746 fputc ('\n', stderr
);
1749 /* Figure file and line of the given INSN. */
1752 file_and_line_for_asm (insn
, pfile
, pline
)
1757 rtx body
= PATTERN (insn
);
1760 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1761 if (GET_CODE (body
) == SET
&& GET_CODE (SET_SRC (body
)) == ASM_OPERANDS
)
1762 asmop
= SET_SRC (body
);
1763 else if (GET_CODE (body
) == ASM_OPERANDS
)
1765 else if (GET_CODE (body
) == PARALLEL
1766 && GET_CODE (XVECEXP (body
, 0, 0)) == SET
)
1767 asmop
= SET_SRC (XVECEXP (body
, 0, 0));
1768 else if (GET_CODE (body
) == PARALLEL
1769 && GET_CODE (XVECEXP (body
, 0, 0)) == ASM_OPERANDS
)
1770 asmop
= XVECEXP (body
, 0, 0);
1776 *pfile
= ASM_OPERANDS_SOURCE_FILE (asmop
);
1777 *pline
= ASM_OPERANDS_SOURCE_LINE (asmop
);
1781 *pfile
= input_filename
;
1786 /* Report an error at line LINE of file FILE. */
1789 v_error_with_file_and_line (file
, line
, msgid
, ap
)
1796 report_error_function (file
);
1797 v_message_with_file_and_line (file
, line
, 0, msgid
, ap
);
1801 error_with_file_and_line
VPROTO((const char *file
, int line
,
1802 const char *msgid
, ...))
1804 #ifndef ANSI_PROTOTYPES
1811 VA_START (ap
, msgid
);
1813 #ifndef ANSI_PROTOTYPES
1814 file
= va_arg (ap
, const char *);
1815 line
= va_arg (ap
, int);
1816 msgid
= va_arg (ap
, const char *);
1819 v_error_with_file_and_line (file
, line
, msgid
, ap
);
1823 /* Report an error at the declaration DECL.
1824 MSGID is a format string which uses %s to substitute the declaration
1825 name; subsequent substitutions are a la printf. */
1828 v_error_with_decl (decl
, msgid
, ap
)
1834 report_error_function (DECL_SOURCE_FILE (decl
));
1835 v_message_with_decl (decl
, 0, msgid
, ap
);
1839 error_with_decl
VPROTO((tree decl
, const char *msgid
, ...))
1841 #ifndef ANSI_PROTOTYPES
1847 VA_START (ap
, msgid
);
1849 #ifndef ANSI_PROTOTYPES
1850 decl
= va_arg (ap
, tree
);
1851 msgid
= va_arg (ap
, const char *);
1854 v_error_with_decl (decl
, msgid
, ap
);
1858 /* Report an error at the line number of the insn INSN.
1859 This is used only when INSN is an `asm' with operands,
1860 and each ASM_OPERANDS records its own source file and line. */
1863 v_error_for_asm (insn
, msgid
, ap
)
1872 file_and_line_for_asm (insn
, &file
, &line
);
1873 report_error_function (file
);
1874 v_message_with_file_and_line (file
, line
, 0, msgid
, ap
);
1878 error_for_asm
VPROTO((rtx insn
, const char *msgid
, ...))
1880 #ifndef ANSI_PROTOTYPES
1886 VA_START (ap
, msgid
);
1888 #ifndef ANSI_PROTOTYPES
1889 insn
= va_arg (ap
, rtx
);
1890 msgid
= va_arg (ap
, const char *);
1893 v_error_for_asm (insn
, msgid
, ap
);
1897 /* Report an error at the current line number. */
1904 v_error_with_file_and_line (input_filename
, lineno
, msgid
, ap
);
1908 error
VPROTO((const char *msgid
, ...))
1910 #ifndef ANSI_PROTOTYPES
1915 VA_START (ap
, msgid
);
1917 #ifndef ANSI_PROTOTYPES
1918 msgid
= va_arg (ap
, const char *);
1925 /* Report a fatal error at the current line number. Allow a front end to
1926 intercept the message. */
1928 static void (*fatal_function
) PROTO ((const char *, va_list));
1930 /* Set the function to call when a fatal error occurs. */
1933 set_fatal_function (f
)
1934 void (*f
) PROTO ((const char *, va_list));
1944 if (fatal_function
!= 0)
1945 (*fatal_function
) (_(msgid
), ap
);
1948 exit (FATAL_EXIT_CODE
);
1952 fatal
VPROTO((const char *msgid
, ...))
1954 #ifndef ANSI_PROTOTYPES
1959 VA_START (ap
, msgid
);
1961 #ifndef ANSI_PROTOTYPES
1962 msgid
= va_arg (ap
, const char *);
1970 _fatal_insn (msgid
, insn
, file
, line
, function
)
1975 const char *function
;
1979 fancy_abort (file
, line
, function
);
1983 _fatal_insn_not_found (insn
, file
, line
, function
)
1987 const char *function
;
1989 if (INSN_CODE (insn
) < 0)
1990 _fatal_insn ("Unrecognizable insn:", insn
, file
, line
, function
);
1992 _fatal_insn ("Insn does not satisfy its constraints:",
1993 insn
, file
, line
, function
);
1996 /* Report a warning at line LINE of file FILE. */
1999 v_warning_with_file_and_line (file
, line
, msgid
, ap
)
2005 if (count_error (1))
2007 report_error_function (file
);
2008 v_message_with_file_and_line (file
, line
, 1, msgid
, ap
);
2013 warning_with_file_and_line
VPROTO((const char *file
, int line
,
2014 const char *msgid
, ...))
2016 #ifndef ANSI_PROTOTYPES
2023 VA_START (ap
, msgid
);
2025 #ifndef ANSI_PROTOTYPES
2026 file
= va_arg (ap
, const char *);
2027 line
= va_arg (ap
, int);
2028 msgid
= va_arg (ap
, const char *);
2031 v_warning_with_file_and_line (file
, line
, msgid
, ap
);
2035 /* Report a warning at the declaration DECL.
2036 MSGID is a format string which uses %s to substitute the declaration
2037 name; subsequent substitutions are a la printf. */
2040 v_warning_with_decl (decl
, msgid
, ap
)
2045 if (count_error (1))
2047 report_error_function (DECL_SOURCE_FILE (decl
));
2048 v_message_with_decl (decl
, 1, msgid
, ap
);
2053 warning_with_decl
VPROTO((tree decl
, const char *msgid
, ...))
2055 #ifndef ANSI_PROTOTYPES
2061 VA_START (ap
, msgid
);
2063 #ifndef ANSI_PROTOTYPES
2064 decl
= va_arg (ap
, tree
);
2065 msgid
= va_arg (ap
, const char *);
2068 v_warning_with_decl (decl
, msgid
, ap
);
2072 /* Report a warning at the line number of the insn INSN.
2073 This is used only when INSN is an `asm' with operands,
2074 and each ASM_OPERANDS records its own source file and line. */
2077 v_warning_for_asm (insn
, msgid
, ap
)
2082 if (count_error (1))
2087 file_and_line_for_asm (insn
, &file
, &line
);
2088 report_error_function (file
);
2089 v_message_with_file_and_line (file
, line
, 1, msgid
, ap
);
2094 warning_for_asm
VPROTO((rtx insn
, const char *msgid
, ...))
2096 #ifndef ANSI_PROTOTYPES
2102 VA_START (ap
, msgid
);
2104 #ifndef ANSI_PROTOTYPES
2105 insn
= va_arg (ap
, rtx
);
2106 msgid
= va_arg (ap
, const char *);
2109 v_warning_for_asm (insn
, msgid
, ap
);
2113 /* Report a warning at the current line number. */
2116 vwarning (msgid
, ap
)
2120 v_warning_with_file_and_line (input_filename
, lineno
, msgid
, ap
);
2124 warning
VPROTO((const char *msgid
, ...))
2126 #ifndef ANSI_PROTOTYPES
2131 VA_START (ap
, msgid
);
2133 #ifndef ANSI_PROTOTYPES
2134 msgid
= va_arg (ap
, const char *);
2137 vwarning (msgid
, ap
);
2141 /* These functions issue either warnings or errors depending on
2142 -pedantic-errors. */
2145 vpedwarn (msgid
, ap
)
2149 if (flag_pedantic_errors
)
2152 vwarning (msgid
, ap
);
2156 pedwarn
VPROTO((const char *msgid
, ...))
2158 #ifndef ANSI_PROTOTYPES
2163 VA_START (ap
, msgid
);
2165 #ifndef ANSI_PROTOTYPES
2166 msgid
= va_arg (ap
, const char *);
2169 vpedwarn (msgid
, ap
);
2174 v_pedwarn_with_decl (decl
, msgid
, ap
)
2179 /* We don't want -pedantic-errors to cause the compilation to fail from
2180 "errors" in system header files. Sometimes fixincludes can't fix what's
2181 broken (eg: unsigned char bitfields - fixing it may change the alignment
2182 which will cause programs to mysteriously fail because the C library
2183 or kernel uses the original layout). There's no point in issuing a
2184 warning either, it's just unnecessary noise. */
2186 if (! DECL_IN_SYSTEM_HEADER (decl
))
2188 if (flag_pedantic_errors
)
2189 v_error_with_decl (decl
, msgid
, ap
);
2191 v_warning_with_decl (decl
, msgid
, ap
);
2196 pedwarn_with_decl
VPROTO((tree decl
, const char *msgid
, ...))
2198 #ifndef ANSI_PROTOTYPES
2204 VA_START (ap
, msgid
);
2206 #ifndef ANSI_PROTOTYPES
2207 decl
= va_arg (ap
, tree
);
2208 msgid
= va_arg (ap
, const char *);
2211 v_pedwarn_with_decl (decl
, msgid
, ap
);
2216 v_pedwarn_with_file_and_line (file
, line
, msgid
, ap
)
2222 if (flag_pedantic_errors
)
2223 v_error_with_file_and_line (file
, line
, msgid
, ap
);
2225 v_warning_with_file_and_line (file
, line
, msgid
, ap
);
2229 pedwarn_with_file_and_line
VPROTO((const char *file
, int line
,
2230 const char *msgid
, ...))
2232 #ifndef ANSI_PROTOTYPES
2239 VA_START (ap
, msgid
);
2241 #ifndef ANSI_PROTOTYPES
2242 file
= va_arg (ap
, const char *);
2243 line
= va_arg (ap
, int);
2244 msgid
= va_arg (ap
, const char *);
2247 v_pedwarn_with_file_and_line (file
, line
, msgid
, ap
);
2251 /* Apologize for not implementing some feature. */
2260 fprintf (stderr
, "%s:%d: ", input_filename
, lineno
);
2262 fprintf (stderr
, "%s: ", progname
);
2263 notice ("sorry, not implemented: ");
2264 vnotice (stderr
, msgid
, ap
);
2265 fputc ('\n', stderr
);
2269 sorry
VPROTO((const char *msgid
, ...))
2271 #ifndef ANSI_PROTOTYPES
2276 VA_START (ap
, msgid
);
2278 #ifndef ANSI_PROTOTYPES
2279 msgid
= va_arg (ap
, const char *);
2287 /* This calls abort and is used to avoid problems when abort if a macro.
2288 It is used when we need to pass the address of abort. */
2296 /* When `malloc.c' is compiled with `rcheck' defined,
2297 it calls this function to report clobberage. */
2301 const char * s ATTRIBUTE_UNUSED
;
2306 /* Return the logarithm of X, base 2, considering X unsigned,
2307 if X is a power of 2. Otherwise, returns -1.
2309 This should be used via the `exact_log2' macro. */
2313 register unsigned HOST_WIDE_INT x
;
2315 register int log
= 0;
2316 /* Test for 0 or a power of 2. */
2317 if (x
== 0 || x
!= (x
& -x
))
2319 while ((x
>>= 1) != 0)
2324 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
2325 If X is 0, return -1.
2327 This should be used via the floor_log2 macro. */
2331 register unsigned HOST_WIDE_INT x
;
2333 register int log
= -1;
2340 static int float_handler_set
;
2342 jmp_buf float_handler
;
2344 /* Signals actually come here. */
2347 float_signal (signo
)
2348 /* If this is missing, some compilers complain. */
2349 int signo ATTRIBUTE_UNUSED
;
2351 if (float_handled
== 0)
2353 #if defined (USG) || defined (hpux)
2354 signal (SIGFPE
, float_signal
); /* re-enable the signal catcher */
2357 signal (SIGFPE
, float_signal
);
2358 longjmp (float_handler
, 1);
2361 /* Specify where to longjmp to when a floating arithmetic error happens.
2362 If HANDLER is 0, it means don't handle the errors any more. */
2365 set_float_handler (handler
)
2368 float_handled
= (handler
!= 0);
2370 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
2372 if (float_handled
&& ! float_handler_set
)
2374 signal (SIGFPE
, float_signal
);
2375 float_handler_set
= 1;
2379 /* This is a wrapper function for code which might elicit an
2380 arithmetic exception. That code should be passed in as a function
2381 pointer FN, and one argument DATA. DATA is usually a struct which
2382 contains the real input and output for function FN. This function
2383 returns 0 (failure) if longjmp was called (i.e. an exception
2384 occured.) It returns 1 (success) otherwise. */
2387 do_float_handler (fn
, data
)
2388 void (*fn
) PROTO ((PTR
));
2395 /* We got here via longjmp() caused by an exception in function fn() */
2396 set_float_handler (NULL
);
2400 set_float_handler (buf
);
2402 set_float_handler (NULL
);
2406 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
2407 error happens, pushing the previous specification into OLD_HANDLER.
2408 Return an indication of whether there was a previous handler in effect. */
2411 push_float_handler (handler
, old_handler
)
2412 jmp_buf handler
, old_handler
;
2414 int was_handled
= float_handled
;
2418 memcpy ((char *) old_handler
, (char *) float_handler
,
2419 sizeof (float_handler
));
2421 memcpy ((char *) float_handler
, (char *) handler
, sizeof (float_handler
));
2425 /* Restore the previous specification of whether and where to longjmp to
2426 when a floating arithmetic error happens. */
2429 pop_float_handler (handled
, handler
)
2433 float_handled
= handled
;
2435 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
2438 /* Handler for SIGPIPE. */
2442 /* If this is missing, some compilers complain. */
2443 int signo ATTRIBUTE_UNUSED
;
2445 fatal ("output pipe has been closed");
2448 /* Strip off a legitimate source ending from the input string NAME of
2449 length LEN. Rather than having to know the names used by all of
2450 our front ends, we strip off an ending of a period followed by
2451 up to five characters. (Java uses ".class".) */
2454 strip_off_ending (name
, len
)
2459 for (i
= 2; i
< 6 && len
> i
; i
++)
2461 if (name
[len
- i
] == '.')
2463 name
[len
- i
] = '\0';
2469 /* Output a quoted string. */
2472 output_quoted_string (asm_file
, string
)
2476 #ifdef OUTPUT_QUOTED_STRING
2477 OUTPUT_QUOTED_STRING (asm_file
, string
);
2481 putc ('\"', asm_file
);
2482 while ((c
= *string
++) != 0)
2484 if (c
== '\"' || c
== '\\')
2485 putc ('\\', asm_file
);
2488 putc ('\"', asm_file
);
2492 /* Output a file name in the form wanted by System V. */
2495 output_file_directive (asm_file
, input_name
)
2497 const char *input_name
;
2499 int len
= strlen (input_name
);
2500 const char *na
= input_name
+ len
;
2502 /* NA gets INPUT_NAME sans directory names. */
2503 while (na
> input_name
)
2507 #ifdef DIR_SEPARATOR
2508 if (na
[-1] == DIR_SEPARATOR
)
2514 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
2515 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
2517 #ifdef ASM_OUTPUT_SOURCE_FILENAME
2518 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
2520 fprintf (asm_file
, "\t.file\t");
2521 output_quoted_string (asm_file
, na
);
2522 fputc ('\n', asm_file
);
2527 #ifdef ASM_IDENTIFY_LANGUAGE
2528 /* Routine to build language identifier for object file. */
2530 output_lang_identify (asm_out_file
)
2533 int len
= strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
2534 char *s
= (char *) alloca (len
);
2535 sprintf (s
, "__gnu_compiled_%s", lang_identify ());
2536 ASM_OUTPUT_LABEL (asm_out_file
, s
);
2540 /* Routine to open a dump file. */
2542 open_dump_file (suffix
, function_name
)
2544 const char *function_name
;
2551 dumpname
= concat (dump_base_name
, suffix
, NULL
);
2553 if (rtl_dump_file
!= NULL
)
2554 fclose (rtl_dump_file
);
2556 rtl_dump_file
= fopen (dumpname
, "a");
2558 if (rtl_dump_file
== NULL
)
2559 pfatal_with_name (dumpname
);
2564 fprintf (rtl_dump_file
, "\n;; Function %s\n\n", function_name
);
2570 /* Routine to close a dump file. */
2572 close_dump_file (func
, insns
)
2573 void (*func
) PROTO ((FILE *, rtx
));
2580 func (rtl_dump_file
, insns
);
2582 fflush (rtl_dump_file
);
2583 fclose (rtl_dump_file
);
2585 rtl_dump_file
= NULL
;
2591 /* Routine to dump rtl into a file. */
2593 dump_rtl (suffix
, decl
, func
, insns
)
2596 void (*func
) PROTO ((FILE *, rtx
));
2599 open_dump_file (suffix
, decl_printable_name (decl
, 2));
2600 close_dump_file (func
, insns
);
2603 /* Routine to empty a dump file. */
2605 clean_dump_file (suffix
)
2608 char * const dumpname
= concat (dump_base_name
, suffix
, NULL
);
2610 rtl_dump_file
= fopen (dumpname
, "w");
2612 if (rtl_dump_file
== NULL
)
2613 pfatal_with_name (dumpname
);
2617 fclose (rtl_dump_file
);
2618 rtl_dump_file
= NULL
;
2623 /* Do any final processing required for the declarations in VEC, of
2624 which there are LEN. We write out inline functions and variables
2625 that have been deferred until this point, but which are required.
2626 Returns non-zero if anything was put out. */
2628 wrapup_global_declarations (vec
, len
)
2635 int output_something
= 0;
2637 for (i
= 0; i
< len
; i
++)
2641 /* We're not deferring this any longer. */
2642 DECL_DEFER_OUTPUT (decl
) = 0;
2644 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0
2645 && incomplete_decl_finalize_hook
!= 0)
2646 (*incomplete_decl_finalize_hook
) (decl
);
2649 /* Now emit any global variables or functions that we have been
2650 putting off. We need to loop in case one of the things emitted
2651 here references another one which comes earlier in the list. */
2655 for (i
= 0; i
< len
; i
++)
2659 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
2662 /* Don't write out static consts, unless we still need them.
2664 We also keep static consts if not optimizing (for debugging),
2665 unless the user specified -fno-keep-static-consts.
2666 ??? They might be better written into the debug information.
2667 This is possible when using DWARF.
2669 A language processor that wants static constants to be always
2670 written out (even if it is not used) is responsible for
2671 calling rest_of_decl_compilation itself. E.g. the C front-end
2672 calls rest_of_decl_compilation from finish_decl.
2673 One motivation for this is that is conventional in some
2674 environments to write things like:
2675 static const char rcsid[] = "... version string ...";
2676 intending to force the string to be in the executable.
2678 A language processor that would prefer to have unneeded
2679 static constants "optimized away" would just defer writing
2680 them out until here. E.g. C++ does this, because static
2681 constants are often defined in header files.
2683 ??? A tempting alternative (for both C and C++) would be
2684 to force a constant to be written if and only if it is
2685 defined in a main file, as opposed to an include file. */
2687 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
2688 && (! TREE_READONLY (decl
)
2689 || TREE_PUBLIC (decl
)
2690 || (!optimize
&& flag_keep_static_consts
)
2691 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
2694 rest_of_decl_compilation (decl
, NULL_PTR
, 1, 1);
2697 if (TREE_CODE (decl
) == FUNCTION_DECL
2698 && DECL_INITIAL (decl
) != 0
2699 && DECL_SAVED_INSNS (decl
) != 0
2700 && (flag_keep_inline_functions
2701 || (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
2702 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
2705 temporary_allocation ();
2706 output_inline_function (decl
);
2707 permanent_allocation (1);
2712 output_something
= 1;
2716 return output_something
;
2719 /* Issue appropriate warnings for the global declarations in VEC (of
2720 which there are LEN). Output debugging information for them. */
2722 check_global_declarations (vec
, len
)
2729 for (i
= 0; i
< len
; i
++)
2733 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
2734 && ! TREE_ASM_WRITTEN (decl
))
2735 /* Cancel the RTL for this decl so that, if debugging info
2736 output for global variables is still to come,
2737 this one will be omitted. */
2738 DECL_RTL (decl
) = NULL
;
2740 /* Warn about any function
2741 declared static but not defined.
2742 We don't warn about variables,
2743 because many programs have static variables
2744 that exist only to get some text into the object file. */
2745 if (TREE_CODE (decl
) == FUNCTION_DECL
2747 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
2748 && DECL_INITIAL (decl
) == 0
2749 && DECL_EXTERNAL (decl
)
2750 && ! DECL_ARTIFICIAL (decl
)
2751 && ! TREE_PUBLIC (decl
))
2753 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
2754 pedwarn_with_decl (decl
,
2755 "`%s' used but never defined");
2757 warning_with_decl (decl
,
2758 "`%s' declared `static' but never defined");
2759 /* This symbol is effectively an "extern" declaration now. */
2760 TREE_PUBLIC (decl
) = 1;
2761 assemble_external (decl
);
2764 /* Warn about static fns or vars defined but not used,
2765 but not about inline functions or static consts
2766 since defining those in header files is normal practice. */
2768 && ((TREE_CODE (decl
) == FUNCTION_DECL
&& ! DECL_INLINE (decl
))
2769 || (TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
2770 && ! DECL_IN_SYSTEM_HEADER (decl
)
2771 && ! DECL_EXTERNAL (decl
)
2772 && ! TREE_PUBLIC (decl
)
2773 && ! TREE_USED (decl
)
2774 && (TREE_CODE (decl
) == FUNCTION_DECL
|| ! DECL_REGISTER (decl
))
2775 /* The TREE_USED bit for file-scope decls
2776 is kept in the identifier, to handle multiple
2777 external decls in different scopes. */
2778 && ! TREE_USED (DECL_NAME (decl
)))
2779 warning_with_decl (decl
, "`%s' defined but not used");
2781 #ifdef SDB_DEBUGGING_INFO
2782 /* The COFF linker can move initialized global vars to the end.
2783 And that can screw up the symbol ordering.
2784 By putting the symbols in that order to begin with,
2785 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2786 if (write_symbols
== SDB_DEBUG
&& TREE_CODE (decl
) == VAR_DECL
2787 && TREE_PUBLIC (decl
) && DECL_INITIAL (decl
)
2788 && ! DECL_EXTERNAL (decl
)
2789 && DECL_RTL (decl
) != 0)
2790 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
2792 /* Output COFF information for non-global
2793 file-scope initialized variables. */
2794 if (write_symbols
== SDB_DEBUG
2795 && TREE_CODE (decl
) == VAR_DECL
2796 && DECL_INITIAL (decl
)
2797 && ! DECL_EXTERNAL (decl
)
2798 && DECL_RTL (decl
) != 0
2799 && GET_CODE (DECL_RTL (decl
)) == MEM
)
2800 TIMEVAR (symout_time
, sdbout_toplevel_data (decl
));
2801 #endif /* SDB_DEBUGGING_INFO */
2802 #ifdef DWARF_DEBUGGING_INFO
2803 /* Output DWARF information for file-scope tentative data object
2804 declarations, file-scope (extern) function declarations (which
2805 had no corresponding body) and file-scope tagged type declarations
2806 and definitions which have not yet been forced out. */
2808 if (write_symbols
== DWARF_DEBUG
2809 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2810 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 1));
2812 #ifdef DWARF2_DEBUGGING_INFO
2813 /* Output DWARF2 information for file-scope tentative data object
2814 declarations, file-scope (extern) function declarations (which
2815 had no corresponding body) and file-scope tagged type declarations
2816 and definitions which have not yet been forced out. */
2818 if (write_symbols
== DWARF2_DEBUG
2819 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2820 TIMEVAR (symout_time
, dwarf2out_decl (decl
));
2825 /* Compile an entire file of output from cpp, named NAME.
2826 Write a file of assembly output and various debugging dumps. */
2835 int name_specified
= name
!= 0;
2837 if (dump_base_name
== 0)
2838 dump_base_name
= name
? name
: "gccdump";
2842 integration_time
= 0;
2848 branch_prob_time
= 0;
2853 local_alloc_time
= 0;
2854 global_alloc_time
= 0;
2859 shorten_branch_time
= 0;
2865 /* Initialize data in various passes. */
2869 name
= init_parse (name
);
2870 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2871 || debug_info_level
== DINFO_LEVEL_VERBOSE
2872 || flag_test_coverage
2873 || warn_notreached
);
2875 init_decl_processing ();
2882 init_function_once ();
2883 init_stor_layout_once ();
2884 init_varasm_once ();
2886 /* The following initialization functions need to generate rtl, so
2887 provide a dummy function context for them. */
2888 init_dummy_function_start ();
2891 if (flag_caller_saves
)
2892 init_caller_save ();
2893 expand_dummy_function_end ();
2895 /* If auxiliary info generation is desired, open the output file.
2896 This goes in the same directory as the source file--unlike
2897 all the other output files. */
2898 if (flag_gen_aux_info
)
2900 aux_info_file
= fopen (aux_info_file_name
, "w");
2901 if (aux_info_file
== 0)
2902 pfatal_with_name (aux_info_file_name
);
2905 /* Clear the dump files. */
2907 clean_dump_file (".00.rtl");
2910 clean_dump_file (".01.jump");
2911 if (graph_dump_format
!= no_graph
)
2912 clean_graph_dump_file (dump_base_name
, ".01.jump");
2916 clean_dump_file (".02.cse");
2917 if (graph_dump_format
!= no_graph
)
2918 clean_graph_dump_file (dump_base_name
, ".02.cse");
2922 clean_dump_file (".03.addressof");
2923 if (graph_dump_format
!= no_graph
)
2924 clean_graph_dump_file (dump_base_name
, ".03.addressof");
2928 clean_dump_file (".04.gcse");
2929 if (graph_dump_format
!= no_graph
)
2930 clean_graph_dump_file (dump_base_name
, ".04.gcse");
2934 clean_dump_file (".05.loop");
2935 if (graph_dump_format
!= no_graph
)
2936 clean_graph_dump_file (dump_base_name
, ".05.loop");
2940 clean_dump_file (".06.cse2");
2941 if (graph_dump_format
!= no_graph
)
2942 clean_graph_dump_file (dump_base_name
, ".06.cse2");
2944 if (branch_prob_dump
)
2946 clean_dump_file (".07.bp");
2947 if (graph_dump_format
!= no_graph
)
2948 clean_graph_dump_file (dump_base_name
, ".07.bp");
2952 clean_dump_file (".08.flow");
2953 if (graph_dump_format
!= no_graph
)
2954 clean_graph_dump_file (dump_base_name
, ".08.flow");
2958 clean_dump_file (".09.combine");
2959 if (graph_dump_format
!= no_graph
)
2960 clean_graph_dump_file (dump_base_name
, ".09.combine");
2964 clean_dump_file (".10.regmove");
2965 if (graph_dump_format
!= no_graph
)
2966 clean_graph_dump_file (dump_base_name
, ".10.regmove");
2968 #ifdef INSN_SCHEDULING
2971 clean_dump_file (".11.sched");
2972 if (graph_dump_format
!= no_graph
)
2973 clean_graph_dump_file (dump_base_name
, ".11.sched");
2978 clean_dump_file (".12.lreg");
2979 if (graph_dump_format
!= no_graph
)
2980 clean_graph_dump_file (dump_base_name
, ".12.lreg");
2982 if (global_reg_dump
)
2984 clean_dump_file (".13.greg");
2985 if (graph_dump_format
!= no_graph
)
2986 clean_graph_dump_file (dump_base_name
, ".13.greg");
2990 clean_dump_file (".14.flow2");
2991 if (graph_dump_format
!= no_graph
)
2992 clean_graph_dump_file (dump_base_name
, ".14.flow2");
2994 #ifdef HAVE_peephole2
2997 clean_dump_file (".15.peephole2");
2998 if (graph_dump_format
!= no_graph
)
2999 clean_graph_dump_file (dump_base_name
, ".15.peephole2");
3002 #ifdef INSN_SCHEDULING
3005 clean_dump_file (".16.sched2");
3006 if (graph_dump_format
!= no_graph
)
3007 clean_graph_dump_file (dump_base_name
, ".16.sched2");
3012 clean_dump_file (".17.jump2");
3013 if (graph_dump_format
!= no_graph
)
3014 clean_graph_dump_file (dump_base_name
, ".17.jump2");
3016 #ifdef MACHINE_DEPENDENT_REORG
3017 if (mach_dep_reorg_dump
)
3019 clean_dump_file (".18.mach");
3020 if (graph_dump_format
!= no_graph
)
3021 clean_graph_dump_file (dump_base_name
, ".18.mach");
3027 clean_dump_file (".19.dbr");
3028 if (graph_dump_format
!= no_graph
)
3029 clean_graph_dump_file (dump_base_name
, ".19.dbr");
3035 clean_dump_file (".20.stack");
3036 if (graph_dump_format
!= no_graph
)
3037 clean_graph_dump_file (dump_base_name
, ".20.stack");
3041 /* Open assembler code output file. */
3043 if (flag_syntax_only
)
3044 asm_out_file
= NULL
;
3047 if (! name_specified
&& asm_file_name
== 0)
3048 asm_out_file
= stdout
;
3051 int len
= strlen (dump_base_name
);
3052 register char *dumpname
= (char *) xmalloc (len
+ 6);
3053 strcpy (dumpname
, dump_base_name
);
3054 strip_off_ending (dumpname
, len
);
3055 strcat (dumpname
, ".s");
3056 if (asm_file_name
== 0)
3057 asm_file_name
= xstrdup (dumpname
);
3058 if (!strcmp (asm_file_name
, "-"))
3059 asm_out_file
= stdout
;
3061 asm_out_file
= fopen (asm_file_name
, "w");
3062 if (asm_out_file
== 0)
3063 pfatal_with_name (asm_file_name
);
3066 #ifdef IO_BUFFER_SIZE
3067 setvbuf (asm_out_file
, (char *) xmalloc (IO_BUFFER_SIZE
),
3068 _IOFBF
, IO_BUFFER_SIZE
);
3073 name
= ggc_alloc_string (name
, strlen (name
));
3074 input_filename
= name
;
3076 /* Put an entry on the input file stack for the main input file. */
3078 = (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
3079 input_file_stack
->next
= 0;
3080 input_file_stack
->name
= input_filename
;
3082 /* Perform language-specific initialization.
3083 This may set main_input_filename. */
3086 /* If the input doesn't start with a #line, use the input name
3087 as the official input file name. */
3088 if (main_input_filename
== 0)
3089 main_input_filename
= name
;
3091 if (flag_syntax_only
)
3093 write_symbols
= NO_DEBUG
;
3095 profile_block_flag
= 0;
3099 ASM_FILE_START (asm_out_file
);
3101 #ifdef ASM_COMMENT_START
3102 if (flag_verbose_asm
)
3104 /* Print the list of options in effect. */
3105 print_version (asm_out_file
, ASM_COMMENT_START
);
3106 print_switch_values (asm_out_file
, 0, MAX_LINE
,
3107 ASM_COMMENT_START
, " ", "\n");
3108 /* Add a blank line here so it appears in assembler output but not
3110 fprintf (asm_out_file
, "\n");
3114 /* Output something to inform GDB that this compilation was by GCC. */
3115 #ifndef ASM_IDENTIFY_GCC
3116 fprintf (asm_out_file
, "gcc2_compiled.:\n");
3118 ASM_IDENTIFY_GCC (asm_out_file
);
3121 /* Output something to identify which front-end produced this file. */
3122 #ifdef ASM_IDENTIFY_LANGUAGE
3123 ASM_IDENTIFY_LANGUAGE (asm_out_file
);
3125 } /* ! flag_syntax_only */
3127 #ifndef ASM_OUTPUT_SECTION_NAME
3128 if (flag_function_sections
)
3130 warning ("-ffunction-sections not supported for this target.");
3131 flag_function_sections
= 0;
3133 if (flag_data_sections
)
3135 warning ("-fdata-sections not supported for this target.");
3136 flag_data_sections
= 0;
3140 if (flag_function_sections
3141 && (profile_flag
|| profile_block_flag
))
3143 warning ("-ffunction-sections disabled; it makes profiling impossible.");
3144 flag_function_sections
= 0;
3147 #ifndef OBJECT_FORMAT_ELF
3148 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
3149 warning ("-ffunction-sections may affect debugging on some targets.");
3152 /* ??? Note: There used to be a conditional here
3153 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
3154 This was to guarantee separation between gcc_compiled. and
3155 the first function, for the sake of dbx on Suns.
3156 However, having the extra zero here confused the Emacs
3157 code for unexec, and might confuse other programs too.
3158 Therefore, I took out that change.
3159 In future versions we should find another way to solve
3160 that dbx problem. -- rms, 23 May 93. */
3162 /* Don't let the first function fall at the same address
3163 as gcc_compiled., if profiling. */
3164 if (profile_flag
|| profile_block_flag
)
3166 /* It's best if we can write a nop here since some
3167 assemblers don't tolerate zeros in the text section. */
3168 output_asm_insn (get_insn_template (CODE_FOR_nop
, NULL
), NULL_PTR
);
3171 /* If dbx symbol table desired, initialize writing it
3172 and output the predefined types. */
3173 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3174 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
3175 TIMEVAR (symout_time
, dbxout_init (asm_out_file
, main_input_filename
,
3178 #ifdef SDB_DEBUGGING_INFO
3179 if (write_symbols
== SDB_DEBUG
)
3180 TIMEVAR (symout_time
, sdbout_init (asm_out_file
, main_input_filename
,
3183 #ifdef DWARF_DEBUGGING_INFO
3184 if (write_symbols
== DWARF_DEBUG
)
3185 TIMEVAR (symout_time
, dwarfout_init (asm_out_file
, main_input_filename
));
3187 #ifdef DWARF2_UNWIND_INFO
3188 if (dwarf2out_do_frame ())
3189 dwarf2out_frame_init ();
3191 #ifdef DWARF2_DEBUGGING_INFO
3192 if (write_symbols
== DWARF2_DEBUG
)
3193 TIMEVAR (symout_time
, dwarf2out_init (asm_out_file
, main_input_filename
));
3196 /* Initialize yet another pass. */
3198 init_final (main_input_filename
);
3199 init_branch_prob (dump_base_name
);
3201 start_time
= get_run_time ();
3203 /* Call the parser, which parses the entire file
3204 (calling rest_of_compilation for each function). */
3206 if (yyparse () != 0)
3208 if (errorcount
== 0)
3209 notice ("Errors detected in input file (your bison.simple is out of date)\n");
3211 /* In case there were missing closebraces,
3212 get us back to the global binding level. */
3213 while (! global_bindings_p ())
3217 /* Compilation is now finished except for writing
3218 what's left of the symbol table output. */
3220 parse_time
+= get_run_time () - start_time
;
3222 parse_time
-= integration_time
;
3223 parse_time
-= varconst_time
;
3225 if (flag_syntax_only
)
3228 globals
= getdecls ();
3230 /* Really define vars that have had only a tentative definition.
3231 Really output inline functions that must actually be callable
3232 and have not been output so far. */
3235 int len
= list_length (globals
);
3236 tree
*vec
= (tree
*) alloca (sizeof (tree
) * len
);
3240 /* Process the decls in reverse order--earliest first.
3241 Put them into VEC from back to front, then take out from front. */
3243 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
3244 vec
[len
- i
- 1] = decl
;
3246 wrapup_global_declarations (vec
, len
);
3248 /* This must occur after the loop to output deferred functions. Else
3249 the profiler initializer would not be emitted if all the functions
3250 in this compilation unit were deferred.
3252 output_func_start_profiler can not cause any additional functions or
3253 data to need to be output, so it need not be in the deferred function
3255 output_func_start_profiler ();
3257 /* Now that all possible functions have been output, we can dump
3258 the exception table. */
3260 output_exception_table ();
3262 check_global_declarations (vec
, len
);
3265 /* Write out any pending weak symbol declarations. */
3269 /* Do dbx symbols */
3270 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3271 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
3272 TIMEVAR (symout_time
,
3274 dbxout_finish (asm_out_file
, main_input_filename
);
3278 #ifdef DWARF_DEBUGGING_INFO
3279 if (write_symbols
== DWARF_DEBUG
)
3280 TIMEVAR (symout_time
,
3286 #ifdef DWARF2_UNWIND_INFO
3287 if (dwarf2out_do_frame ())
3288 dwarf2out_frame_finish ();
3291 #ifdef DWARF2_DEBUGGING_INFO
3292 if (write_symbols
== DWARF2_DEBUG
)
3293 TIMEVAR (symout_time
,
3295 dwarf2out_finish ();
3299 /* Output some stuff at end of file if nec. */
3301 end_final (dump_base_name
);
3303 if (branch_prob_dump
)
3304 open_dump_file (".07.bp", NULL
);
3306 TIMEVAR (dump_time
, end_branch_prob (rtl_dump_file
));
3308 if (branch_prob_dump
)
3309 close_dump_file (NULL
, NULL_RTX
);
3312 ASM_FILE_END (asm_out_file
);
3316 /* Language-specific end of compilation actions. */
3320 /* Close the dump files. */
3322 if (flag_gen_aux_info
)
3324 fclose (aux_info_file
);
3326 unlink (aux_info_file_name
);
3331 open_dump_file (".09.combine", NULL
);
3332 TIMEVAR (dump_time
, dump_combine_total_stats (rtl_dump_file
));
3333 close_dump_file (NULL
, NULL_RTX
);
3336 /* Close non-debugging input and output files. Take special care to note
3337 whether fclose returns an error, since the pages might still be on the
3338 buffer chain while the file is open. */
3342 if (! flag_syntax_only
3343 && (ferror (asm_out_file
) != 0 || fclose (asm_out_file
) != 0))
3344 fatal_io_error (asm_file_name
);
3346 /* Do whatever is necessary to finish printing the graphs. */
3347 if (graph_dump_format
!= no_graph
)
3350 finish_graph_dump_file (dump_base_name
, ".01.jump");
3352 finish_graph_dump_file (dump_base_name
, ".02.cse");
3354 finish_graph_dump_file (dump_base_name
, ".03.addressof");
3356 finish_graph_dump_file (dump_base_name
, ".04.gcse");
3358 finish_graph_dump_file (dump_base_name
, ".05.loop");
3360 finish_graph_dump_file (dump_base_name
, ".06.cse2");
3361 if (branch_prob_dump
)
3362 finish_graph_dump_file (dump_base_name
, ".07.bp");
3364 finish_graph_dump_file (dump_base_name
, ".08.flow");
3366 finish_graph_dump_file (dump_base_name
, ".09.combine");
3368 finish_graph_dump_file (dump_base_name
, ".10.regmove");
3369 #ifdef INSN_SCHEDULING
3371 finish_graph_dump_file (dump_base_name
, ".11.sched");
3374 finish_graph_dump_file (dump_base_name
, ".12.lreg");
3375 if (global_reg_dump
)
3376 finish_graph_dump_file (dump_base_name
, ".13.greg");
3378 finish_graph_dump_file (dump_base_name
, ".14.flow2");
3379 #ifdef HAVE_peephole2
3381 finish_graph_dump_file (dump_base_name
, ".15.peephole2");
3383 #ifdef INSN_SCHEDULING
3385 finish_graph_dump_file (dump_base_name
, ".16.sched2");
3388 finish_graph_dump_file (dump_base_name
, ".17.jump2");
3389 #ifdef MACHINE_DEPENDENT_REORG
3390 if (mach_dep_reorg_dump
)
3391 finish_graph_dump_file (dump_base_name
, ".18.mach");
3395 finish_graph_dump_file (dump_base_name
, ".19.dbr");
3399 finish_graph_dump_file (dump_base_name
, ".20.stack");
3403 /* Free up memory for the benefit of leak detectors. */
3406 /* Print the times. */
3410 all_time
= get_run_time ();
3412 fprintf (stderr
,"\n");
3414 print_time ("parse", parse_time
);
3415 print_time ("integration", integration_time
);
3416 print_time ("jump", jump_time
);
3417 print_time ("cse", cse_time
);
3418 print_time ("gcse", gcse_time
);
3419 print_time ("loop", loop_time
);
3420 print_time ("cse2", cse2_time
);
3421 print_time ("branch-prob", branch_prob_time
);
3422 print_time ("flow", flow_time
);
3423 print_time ("combine", combine_time
);
3424 print_time ("regmove", regmove_time
);
3425 #ifdef INSN_SCHEDULING
3426 print_time ("sched", sched_time
);
3428 print_time ("local-alloc", local_alloc_time
);
3429 print_time ("global-alloc", global_alloc_time
);
3430 print_time ("flow2", flow2_time
);
3431 #ifdef HAVE_peephole2
3432 print_time ("peephole2", peephole2_time
);
3434 #ifdef INSN_SCHEDULING
3435 print_time ("sched2", sched2_time
);
3438 print_time ("dbranch", dbr_sched_time
);
3440 print_time ("shorten-branch", shorten_branch_time
);
3442 print_time ("stack-reg", stack_reg_time
);
3444 print_time ("final", final_time
);
3445 print_time ("varconst", varconst_time
);
3446 print_time ("symout", symout_time
);
3447 print_time ("dump", dump_time
);
3449 print_time ("gc", gc_time
);
3453 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
3454 and TYPE_DECL nodes.
3456 This does nothing for local (non-static) variables, unless the
3457 variable is a register variable with an ASMSPEC. In that case, or
3458 if the variable is not an automatice, it sets up the RTL and
3459 outputs any assembler code (label definition, storage allocation
3460 and initialization).
3462 DECL is the declaration. If ASMSPEC is nonzero, it specifies
3463 the assembler symbol name to be used. TOP_LEVEL is nonzero
3464 if this declaration is not within a function. */
3467 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
3469 const char *asmspec
;
3473 /* Declarations of variables, and of functions defined elsewhere. */
3475 /* The most obvious approach, to put an #ifndef around where
3476 this macro is used, doesn't work since it's inside a macro call. */
3477 #ifndef ASM_FINISH_DECLARE_OBJECT
3478 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
3481 /* Forward declarations for nested functions are not "external",
3482 but we need to treat them as if they were. */
3483 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
3484 || TREE_CODE (decl
) == FUNCTION_DECL
)
3485 TIMEVAR (varconst_time
,
3487 make_decl_rtl (decl
, asmspec
, top_level
);
3488 /* Initialized extern variable exists to be replaced
3489 with its value, or represents something that will be
3490 output in another file. */
3491 if (! (TREE_CODE (decl
) == VAR_DECL
3492 && DECL_EXTERNAL (decl
) && TREE_READONLY (decl
)
3493 && DECL_INITIAL (decl
) != 0
3494 && DECL_INITIAL (decl
) != error_mark_node
))
3495 /* Don't output anything
3496 when a tentative file-scope definition is seen.
3497 But at end of compilation, do output code for them. */
3498 if (! (! at_end
&& top_level
3499 && (DECL_INITIAL (decl
) == 0
3500 || DECL_INITIAL (decl
) == error_mark_node
)))
3501 assemble_variable (decl
, top_level
, at_end
, 0);
3502 if (decl
== last_assemble_variable_decl
)
3504 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
3508 else if (DECL_REGISTER (decl
) && asmspec
!= 0)
3510 if (decode_reg_name (asmspec
) >= 0)
3512 DECL_RTL (decl
) = 0;
3513 make_decl_rtl (decl
, asmspec
, top_level
);
3516 error ("invalid register name `%s' for register variable", asmspec
);
3518 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3519 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
3520 && TREE_CODE (decl
) == TYPE_DECL
)
3521 TIMEVAR (symout_time
, dbxout_symbol (decl
, 0));
3523 #ifdef SDB_DEBUGGING_INFO
3524 else if (write_symbols
== SDB_DEBUG
&& top_level
3525 && TREE_CODE (decl
) == TYPE_DECL
)
3526 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
3530 /* Called after finishing a record, union or enumeral type. */
3533 rest_of_type_compilation (type
, toplev
)
3534 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
3538 tree type ATTRIBUTE_UNUSED
;
3539 int toplev ATTRIBUTE_UNUSED
;
3542 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3543 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
3544 TIMEVAR (symout_time
, dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
));
3546 #ifdef SDB_DEBUGGING_INFO
3547 if (write_symbols
== SDB_DEBUG
)
3548 TIMEVAR (symout_time
, sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
));
3552 /* This is called from finish_function (within yyparse)
3553 after each top-level definition is parsed.
3554 It is supposed to compile that function or variable
3555 and output the assembler code for it.
3556 After we return, the tree storage is freed. */
3559 rest_of_compilation (decl
)
3563 int start_time
= get_run_time ();
3565 /* Nonzero if we have saved the original DECL_INITIAL of the function,
3566 to be restored after we finish compiling the function
3567 (for use when compiling inline calls to this function). */
3568 tree saved_block_tree
= 0;
3569 /* Likewise, for DECL_ARGUMENTS. */
3570 tree saved_arguments
= 0;
3572 int rebuild_label_notes_after_reload
;
3574 /* If we are reconsidering an inline function
3575 at the end of compilation, skip the stuff for making it inline. */
3577 if (DECL_SAVED_INSNS (decl
) == 0)
3583 /* If this is nested inside an inlined external function, pretend
3584 it was only declared. Since we cannot inline such functions,
3585 generating code for this one is not only not necessary but will
3586 confuse some debugging output writers. */
3587 for (parent
= DECL_CONTEXT (current_function_decl
);
3588 parent
!= 0; parent
= DECL_CONTEXT (parent
))
3589 if (TREE_CODE (parent
) == FUNCTION_DECL
3590 && DECL_INLINE (parent
) && DECL_EXTERNAL (parent
))
3592 DECL_INITIAL (decl
) = 0;
3593 goto exit_rest_of_compilation
;
3596 /* If requested, consider whether to make this function inline. */
3597 if (DECL_INLINE (decl
) || flag_inline_functions
)
3598 TIMEVAR (integration_time
,
3600 lose
= function_cannot_inline_p (decl
);
3601 if (lose
|| ! optimize
)
3603 if (warn_inline
&& DECL_INLINE (decl
))
3604 warning_with_decl (decl
, lose
);
3605 DECL_ABSTRACT_ORIGIN (decl
) = 0;
3606 /* Don't really compile an extern inline function.
3607 If we can't make it inline, pretend
3608 it was only declared. */
3609 if (DECL_EXTERNAL (decl
))
3611 DECL_INITIAL (decl
) = 0;
3612 goto exit_rest_of_compilation
;
3616 /* ??? Note that this has the effect of making it look
3617 like "inline" was specified for a function if we choose
3618 to inline it. This isn't quite right, but it's
3619 probably not worth the trouble to fix. */
3620 inlinable
= DECL_INLINE (decl
) = 1;
3623 insns
= get_insns ();
3625 /* Dump the rtl code if we are dumping rtl. */
3629 open_dump_file (".00.rtl", decl_printable_name (decl
, 2));
3631 if (DECL_SAVED_INSNS (decl
))
3632 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
3634 close_dump_file (print_rtl
, insns
);
3637 /* If function is inline, and we don't yet know whether to
3638 compile it by itself, defer decision till end of compilation.
3639 finish_compilation will call rest_of_compilation again
3640 for those functions that need to be output. Also defer those
3641 functions that we are supposed to defer. */
3644 DECL_DEFER_OUTPUT (decl
) = 1;
3646 if (DECL_DEFER_OUTPUT (decl
)
3647 || (DECL_INLINE (decl
)
3648 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
3649 && ! flag_keep_inline_functions
)
3650 || DECL_EXTERNAL (decl
))))
3652 DECL_DEFER_OUTPUT (decl
) = 1;
3654 /* If -Wreturn-type, we have to do a bit of compilation.
3655 However, if we just fall through we will call
3656 save_for_inline_copying() which results in excessive
3657 memory use. Instead, we just want to call
3658 jump_optimize() to figure out whether or not we can fall
3659 off the end of the function; we do the minimum amount of
3660 work necessary to make that safe. And, we set optimize
3661 to zero to keep jump_optimize from working too hard. */
3662 if (warn_return_type
)
3664 int saved_optimize
= optimize
;
3666 find_exception_handler_labels ();
3667 jump_optimize (get_insns(), !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
3668 !JUMP_AFTER_REGSCAN
);
3669 optimize
= saved_optimize
;
3672 #ifdef DWARF_DEBUGGING_INFO
3673 /* Generate the DWARF info for the "abstract" instance
3674 of a function which we may later generate inlined and/or
3675 out-of-line instances of. */
3676 if (write_symbols
== DWARF_DEBUG
)
3678 set_decl_abstract_flags (decl
, 1);
3679 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
3680 set_decl_abstract_flags (decl
, 0);
3683 #ifdef DWARF2_DEBUGGING_INFO
3684 /* Generate the DWARF2 info for the "abstract" instance
3685 of a function which we may later generate inlined and/or
3686 out-of-line instances of. */
3687 if (write_symbols
== DWARF2_DEBUG
)
3689 set_decl_abstract_flags (decl
, 1);
3690 TIMEVAR (symout_time
, dwarf2out_decl (decl
));
3691 set_decl_abstract_flags (decl
, 0);
3694 TIMEVAR (integration_time
, save_for_inline_nocopy (decl
));
3695 DECL_SAVED_INSNS (decl
)->inlinable
= inlinable
;
3696 goto exit_rest_of_compilation
;
3699 /* If specified extern inline but we aren't inlining it, we are
3700 done. This goes for anything that gets here with DECL_EXTERNAL
3701 set, not just things with DECL_INLINE. */
3702 if (DECL_EXTERNAL (decl
))
3703 goto exit_rest_of_compilation
;
3706 /* Initialize some variables used by the optimizers. */
3707 init_function_for_compilation ();
3709 if (! DECL_DEFER_OUTPUT (decl
))
3710 TREE_ASM_WRITTEN (decl
) = 1;
3712 /* Now that integrate will no longer see our rtl, we need not distinguish
3713 between the return value of this function and the return value of called
3715 rtx_equal_function_value_matters
= 0;
3717 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
3718 if ((rtl_dump_and_exit
|| flag_syntax_only
) && !warn_return_type
)
3720 goto exit_rest_of_compilation
;
3723 /* Emit code to get eh context, if needed. */
3727 /* If we are doing position-independent code generation, now
3728 is the time to output special prologues and epilogues.
3729 We do not want to do this earlier, because it just clutters
3730 up inline functions with meaningless insns. */
3735 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
3736 Note that that may have been done above, in save_for_inline_copying.
3737 The call to resume_temporary_allocation near the end of this function
3738 goes back to the usual state of affairs. This must be done after
3739 we've built up any unwinders for exception handling, and done
3740 the FINALIZE_PIC work, if necessary. */
3742 rtl_in_current_obstack ();
3744 insns
= get_insns ();
3746 /* Copy any shared structure that should not be shared. */
3748 unshare_all_rtl (insns
);
3750 init_EXPR_INSN_LIST_cache ();
3752 #ifdef SETJMP_VIA_SAVE_AREA
3753 /* This must be performed before virutal register instantiation. */
3754 if (current_function_calls_alloca
)
3755 optimize_save_area_alloca (insns
);
3758 /* Instantiate all virtual registers. */
3760 instantiate_virtual_regs (current_function_decl
, get_insns ());
3762 /* See if we have allocated stack slots that are not directly addressable.
3763 If so, scan all the insns and create explicit address computation
3764 for all references to such slots. */
3765 /* fixup_stack_slots (); */
3767 /* Find all the EH handlers. */
3768 find_exception_handler_labels ();
3771 open_dump_file (".01.jump", decl_printable_name (decl
, 2));
3773 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
3774 are initialized and to compute whether control can drop off the end
3776 TIMEVAR (jump_time
, reg_scan (insns
, max_reg_num (), 0));
3777 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
3778 JUMP_AFTER_REGSCAN
));
3780 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
3781 if (rtl_dump_and_exit
|| flag_syntax_only
|| DECL_DEFER_OUTPUT (decl
))
3782 goto exit_rest_of_compilation
;
3784 /* Try to identify useless null pointer tests and delete them. */
3785 if (flag_delete_null_pointer_checks
)
3786 TIMEVAR (jump_time
, delete_null_pointer_checks (get_insns ()));
3788 /* Dump rtl code after jump, if we are doing that. */
3790 close_dump_file (print_rtl
, insns
);
3795 /* Perform common subexpression elimination.
3796 Nonzero value from `cse_main' means that jumps were simplified
3797 and some code may now be unreachable, so do
3798 jump optimization again. */
3803 open_dump_file (".02.cse", decl_printable_name (decl
, 2));
3805 TIMEVAR (cse_time
, reg_scan (insns
, max_reg_num (), 1));
3807 if (flag_thread_jumps
)
3808 TIMEVAR (jump_time
, thread_jumps (insns
, max_reg_num (), 1));
3810 TIMEVAR (cse_time
, tem
= cse_main (insns
, max_reg_num (),
3812 /* If we are not running the second CSE pass, then we are no longer
3813 expecting CSE to be run. */
3814 cse_not_expected
= !flag_rerun_cse_after_loop
;
3816 if (tem
|| optimize
> 1)
3817 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3819 !JUMP_AFTER_REGSCAN
));
3821 /* Run this after jump optmizations remove all the unreachable code
3822 so that unreachable code will not keep values live. */
3823 TIMEVAR (cse_time
, delete_trivially_dead_insns (insns
, max_reg_num ()));
3825 /* Try to identify useless null pointer tests and delete them. */
3826 if (flag_delete_null_pointer_checks
)
3827 TIMEVAR (jump_time
, delete_null_pointer_checks (get_insns ()));
3829 /* Dump rtl code after cse, if we are doing that. */
3833 close_dump_file (print_rtl
, insns
);
3834 if (graph_dump_format
!= no_graph
)
3835 print_rtl_graph_with_bb (dump_base_name
, ".02.cse", insns
);
3839 purge_addressof (insns
);
3840 reg_scan (insns
, max_reg_num (), 1);
3844 dump_rtl (".03.addressof", decl
, print_rtl
, insns
);
3845 if (graph_dump_format
!= no_graph
)
3846 print_rtl_graph_with_bb (dump_base_name
, ".03.addressof", insns
);
3852 /* Perform global cse. */
3854 if (optimize
> 0 && flag_gcse
)
3857 open_dump_file (".04.gcse", decl_printable_name (decl
, 2));
3859 TIMEVAR (gcse_time
, tem
= gcse_main (insns
, rtl_dump_file
));
3861 /* If gcse altered any jumps, rerun jump optimizations to clean
3865 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3867 !JUMP_AFTER_REGSCAN
));
3872 close_dump_file (print_rtl
, insns
);
3873 if (graph_dump_format
!= no_graph
)
3874 print_rtl_graph_with_bb (dump_base_name
, ".04.gcse", insns
);
3880 /* Move constant computations out of loops. */
3885 open_dump_file (".05.loop", decl_printable_name (decl
, 2));
3890 if (flag_rerun_loop_opt
)
3892 /* We only want to perform unrolling once. */
3894 loop_optimize (insns
, rtl_dump_file
, 0, 0);
3897 /* The first call to loop_optimize makes some instructions
3898 trivially dead. We delete those instructions now in the
3899 hope that doing so will make the heuristics in loop work
3900 better and possibly speed up compilation. */
3901 delete_trivially_dead_insns (insns
, max_reg_num ());
3903 /* The regscan pass is currently necessary as the alias
3904 analysis code depends on this information. */
3905 reg_scan (insns
, max_reg_num (), 1);
3907 loop_optimize (insns
, rtl_dump_file
, flag_unroll_loops
, 1);
3910 /* Dump rtl code after loop opt, if we are doing that. */
3914 close_dump_file (print_rtl
, insns
);
3915 if (graph_dump_format
!= no_graph
)
3916 print_rtl_graph_with_bb (dump_base_name
, ".05.loop", insns
);
3923 /* ??? Well, nearly. If HAVE_conditional_arithmetic, jump_optimize
3924 has put off all if-conversion until "after CSE". If we put this
3925 off any longer we may miss out doing if-conversion entirely. */
3926 cse_not_expected
= 1;
3931 open_dump_file (".06.cse2", decl_printable_name (decl
, 2));
3933 if (flag_rerun_cse_after_loop
)
3935 /* Running another jump optimization pass before the second
3936 cse pass sometimes simplifies the RTL enough to allow
3937 the second CSE pass to do a better job. Jump_optimize can change
3938 max_reg_num so we must rerun reg_scan afterwards.
3939 ??? Rework to not call reg_scan so often. */
3940 TIMEVAR (jump_time
, reg_scan (insns
, max_reg_num (), 0));
3941 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3943 JUMP_AFTER_REGSCAN
));
3945 TIMEVAR (cse2_time
, reg_scan (insns
, max_reg_num (), 0));
3946 TIMEVAR (cse2_time
, tem
= cse_main (insns
, max_reg_num (),
3949 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3951 !JUMP_AFTER_REGSCAN
));
3954 if (flag_thread_jumps
)
3956 /* This pass of jump threading straightens out code
3957 that was kinked by loop optimization. */
3958 TIMEVAR (jump_time
, reg_scan (insns
, max_reg_num (), 0));
3959 TIMEVAR (jump_time
, thread_jumps (insns
, max_reg_num (), 0));
3962 /* Dump rtl code after cse, if we are doing that. */
3966 close_dump_file (print_rtl
, insns
);
3967 if (graph_dump_format
!= no_graph
)
3968 print_rtl_graph_with_bb (dump_base_name
, ".06.cse2", insns
);
3975 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
3977 if (branch_prob_dump
)
3978 open_dump_file (".07.bp", decl_printable_name (decl
, 2));
3983 branch_prob (insns
, rtl_dump_file
);
3986 if (branch_prob_dump
)
3988 close_dump_file (print_rtl
, insns
);
3989 if (graph_dump_format
!= no_graph
)
3990 print_rtl_graph_with_bb (dump_base_name
, ".07.bp", insns
);
3997 /* Now we choose between stupid (pcc-like) register allocation
3998 (if we got the -noreg switch and not -opt)
3999 and smart register allocation. */
4001 if (optimize
> 0) /* Stupid allocation probably won't work */
4002 obey_regdecls
= 0; /* if optimizations being done. */
4006 /* Print function header into flow dump now
4007 because doing the flow analysis makes some of the dump. */
4010 open_dump_file (".08.flow", decl_printable_name (decl
, 2));
4016 regclass (insns
, max_reg_num ());
4017 stupid_life_analysis (insns
, max_reg_num (),
4023 /* Do control and data flow analysis,
4024 and write some of the results to dump file. */
4029 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
, 1);
4030 life_analysis (insns
, max_reg_num (), rtl_dump_file
, 1);
4033 if (warn_uninitialized
|| extra_warnings
)
4035 uninitialized_vars_warning (DECL_INITIAL (decl
));
4037 setjmp_args_warning ();
4041 /* Dump rtl after flow analysis. */
4045 close_dump_file (print_rtl_with_bb
, insns
);
4046 if (graph_dump_format
!= no_graph
)
4047 print_rtl_graph_with_bb (dump_base_name
, ".08.flow", insns
);
4053 /* The first life analysis pass has finished. From now on we can not
4054 generate any new pseudos. */
4057 /* If -opt, try combining insns through substitution. */
4061 TIMEVAR (combine_time
, combine_instructions (insns
, max_reg_num ()));
4063 /* Dump rtl code after insn combination. */
4067 dump_rtl (".09.combine", decl
, print_rtl_with_bb
, insns
);
4068 if (graph_dump_format
!= no_graph
)
4069 print_rtl_graph_with_bb (dump_base_name
, ".09.combine", insns
);
4076 /* Register allocation pre-pass, to reduce number of moves
4077 necessary for two-address machines. */
4078 if (optimize
> 0 && (flag_regmove
|| flag_expensive_optimizations
))
4081 open_dump_file (".10.regmove", decl_printable_name (decl
, 2));
4083 TIMEVAR (regmove_time
, regmove_optimize (insns
, max_reg_num (),
4088 close_dump_file (print_rtl_with_bb
, insns
);
4089 if (graph_dump_format
!= no_graph
)
4090 print_rtl_graph_with_bb (dump_base_name
, ".10.regmove", insns
);
4097 /* Print function header into sched dump now
4098 because doing the sched analysis makes some of the dump. */
4100 #ifdef INSN_SCHEDULING
4101 if (optimize
> 0 && flag_schedule_insns
)
4104 open_dump_file (".11.sched", decl_printable_name (decl
, 2));
4106 /* Do control and data sched analysis,
4107 and write some of the results to dump file. */
4109 TIMEVAR (sched_time
, schedule_insns (rtl_dump_file
));
4111 /* Dump rtl after instruction scheduling. */
4115 close_dump_file (print_rtl_with_bb
, insns
);
4116 if (graph_dump_format
!= no_graph
)
4117 print_rtl_graph_with_bb (dump_base_name
, ".11.sched", insns
);
4125 /* Determine if the current function is a leaf before running reload
4126 since this can impact optimizations done by the prologue and
4127 epilogue thus changing register elimination offsets. */
4128 current_function_is_leaf
= leaf_function_p ();
4130 /* Unless we did stupid register allocation,
4131 allocate pseudo-regs that are used only within 1 basic block.
4133 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
4134 jump optimizer after register allocation and reloading are finished. */
4137 TIMEVAR (local_alloc_time
,
4139 /* We recomputed reg usage as part of updating the rest
4140 of life info during sched. */
4141 if (! flag_schedule_insns
)
4142 recompute_reg_usage (insns
, ! optimize_size
);
4143 regclass (insns
, max_reg_num ());
4144 rebuild_label_notes_after_reload
= local_alloc ();
4147 rebuild_label_notes_after_reload
= 0;
4149 /* Dump rtl code after allocating regs within basic blocks. */
4153 open_dump_file (".12.lreg", decl_printable_name (decl
, 2));
4155 TIMEVAR (dump_time
, dump_flow_info (rtl_dump_file
));
4156 TIMEVAR (dump_time
, dump_local_alloc (rtl_dump_file
));
4158 close_dump_file (print_rtl_with_bb
, insns
);
4159 if (graph_dump_format
!= no_graph
)
4160 print_rtl_graph_with_bb (dump_base_name
, ".12.lreg", insns
);
4166 if (global_reg_dump
)
4167 open_dump_file (".13.greg", decl_printable_name (decl
, 2));
4169 /* Unless we did stupid register allocation,
4170 allocate remaining pseudo-regs, then do the reload pass
4171 fixing up any insns that are invalid. */
4173 TIMEVAR (global_alloc_time
,
4176 failure
= global_alloc (rtl_dump_file
);
4178 failure
= reload (insns
, 0, rtl_dump_file
);
4183 goto exit_rest_of_compilation
;
4188 /* Do a very simple CSE pass over just the hard registers. */
4190 reload_cse_regs (insns
);
4192 /* Register allocation and reloading may have turned an indirect jump into
4193 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
4194 jumping instructions. */
4195 if (rebuild_label_notes_after_reload
)
4196 TIMEVAR (jump_time
, rebuild_jump_labels (insns
));
4198 /* On some machines, the prologue and epilogue code, or parts thereof,
4199 can be represented as RTL. Doing so lets us schedule insns between
4200 it and the rest of the code and also allows delayed branch
4201 scheduling to operate in the epilogue. */
4203 thread_prologue_and_epilogue_insns (insns
);
4205 /* If optimizing and we are performing instruction scheduling after
4206 reload, then go ahead and split insns now since we are about to
4207 recompute flow information anyway.
4209 reload_cse_regs may expose more splitting opportunities, expecially
4210 for double-word operations. */
4211 if (optimize
> 0 && flag_schedule_insns_after_reload
)
4212 split_all_insns (0);
4214 if (global_reg_dump
)
4216 TIMEVAR (dump_time
, dump_global_regs (rtl_dump_file
));
4217 close_dump_file (print_rtl_with_bb
, insns
);
4218 if (graph_dump_format
!= no_graph
)
4219 print_rtl_graph_with_bb (dump_base_name
, ".13.greg", insns
);
4222 /* Re-create the death notes which were deleted during reload. */
4224 open_dump_file (".14.flow2", decl_printable_name (decl
, 2));
4231 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
, 1);
4232 life_analysis (insns
, max_reg_num (), rtl_dump_file
, 1);
4239 flow2_completed
= 1;
4243 close_dump_file (print_rtl_with_bb
, insns
);
4244 if (graph_dump_format
!= no_graph
)
4245 print_rtl_graph_with_bb (dump_base_name
, ".14.flow2", insns
);
4248 #ifdef HAVE_peephole2
4249 if (optimize
> 0 && flag_peephole2
)
4252 open_dump_file (".15.peephole2", decl_printable_name (decl
, 2));
4254 TIMEVAR (peephole2_time
, peephole2_optimize (rtl_dump_file
));
4258 close_dump_file (print_rtl_with_bb
, insns
);
4259 if (graph_dump_format
!= no_graph
)
4260 print_rtl_graph_with_bb (dump_base_name
, ".15.peephole2", insns
);
4265 #ifdef INSN_SCHEDULING
4266 if (optimize
> 0 && flag_schedule_insns_after_reload
)
4269 open_dump_file (".16.sched2", decl_printable_name (decl
, 2));
4271 /* Do control and data sched analysis again,
4272 and write some more of the results to dump file. */
4274 TIMEVAR (sched2_time
, schedule_insns (rtl_dump_file
));
4276 /* Dump rtl after post-reorder instruction scheduling. */
4280 close_dump_file (print_rtl_with_bb
, insns
);
4281 if (graph_dump_format
!= no_graph
)
4282 print_rtl_graph_with_bb (dump_base_name
, ".16.sched2", insns
);
4290 #ifdef LEAF_REGISTERS
4291 current_function_uses_only_leaf_regs
4292 = optimize
> 0 && only_leaf_regs_used () && leaf_function_p ();
4295 /* One more attempt to remove jumps to .+1
4296 left by dead-store-elimination.
4297 Also do cross-jumping this time
4298 and delete no-op move insns. */
4302 TIMEVAR (jump_time
, jump_optimize (insns
, JUMP_CROSS_JUMP
,
4304 !JUMP_AFTER_REGSCAN
));
4306 /* Dump rtl code after jump, if we are doing that. */
4310 dump_rtl (".17.jump2", decl
, print_rtl_with_bb
, insns
);
4311 if (graph_dump_format
!= no_graph
)
4312 print_rtl_graph_with_bb (dump_base_name
, ".17.jump2", insns
);
4316 /* If a machine dependent reorganization is needed, call it. */
4317 #ifdef MACHINE_DEPENDENT_REORG
4318 if (mach_dep_reorg_dump
)
4319 open_dump_file (".18.mach", decl_printable_name (decl
, 2));
4321 MACHINE_DEPENDENT_REORG (insns
);
4323 if (mach_dep_reorg_dump
)
4325 close_dump_file (print_rtl_with_bb
, insns
);
4326 if (graph_dump_format
!= no_graph
)
4327 print_rtl_graph_with_bb (dump_base_name
, ".18.mach", insns
);
4334 /* If a scheduling pass for delayed branches is to be done,
4335 call the scheduling code. */
4338 if (optimize
> 0 && flag_delayed_branch
)
4341 open_dump_file (".19.dbr", decl_printable_name (decl
, 2));
4346 dbr_schedule (insns
, rtl_dump_file
);
4351 close_dump_file (print_rtl_with_bb
, insns
);
4352 if (graph_dump_format
!= no_graph
)
4353 print_rtl_graph_with_bb (dump_base_name
, ".19.dbr", insns
);
4361 /* Shorten branches. */
4362 TIMEVAR (shorten_branch_time
,
4364 shorten_branches (get_insns ());
4369 open_dump_file (".20.stack", decl_printable_name (decl
, 2));
4371 TIMEVAR (stack_reg_time
, reg_to_stack (insns
, rtl_dump_file
));
4375 close_dump_file (print_rtl_with_bb
, insns
);
4376 if (graph_dump_format
!= no_graph
)
4377 print_rtl_graph_with_bb (dump_base_name
, ".20.stack", insns
);
4384 /* Now turn the rtl into assembler code. */
4386 TIMEVAR (final_time
,
4391 /* Get the function's name, as described by its RTL.
4392 This may be different from the DECL_NAME name used
4393 in the source file. */
4395 x
= DECL_RTL (decl
);
4396 if (GET_CODE (x
) != MEM
)
4399 if (GET_CODE (x
) != SYMBOL_REF
)
4401 fnname
= XSTR (x
, 0);
4403 assemble_start_function (decl
, fnname
);
4404 final_start_function (insns
, asm_out_file
, optimize
);
4405 final (insns
, asm_out_file
, optimize
, 0);
4406 final_end_function (insns
, asm_out_file
, optimize
);
4407 assemble_end_function (decl
, fnname
);
4409 fflush (asm_out_file
);
4411 /* Release all memory allocated by flow. */
4412 free_basic_block_vars (0);
4414 /* Release all memory held by regsets now */
4415 regset_release_memory ();
4421 /* Write DBX symbols if requested */
4423 /* Note that for those inline functions where we don't initially
4424 know for certain that we will be generating an out-of-line copy,
4425 the first invocation of this routine (rest_of_compilation) will
4426 skip over this code by doing a `goto exit_rest_of_compilation;'.
4427 Later on, finish_compilation will call rest_of_compilation again
4428 for those inline functions that need to have out-of-line copies
4429 generated. During that call, we *will* be routed past here. */
4431 #ifdef DBX_DEBUGGING_INFO
4432 if (write_symbols
== DBX_DEBUG
)
4433 TIMEVAR (symout_time
, dbxout_function (decl
));
4436 #ifdef DWARF_DEBUGGING_INFO
4437 if (write_symbols
== DWARF_DEBUG
)
4438 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
4441 #ifdef DWARF2_DEBUGGING_INFO
4442 if (write_symbols
== DWARF2_DEBUG
)
4443 TIMEVAR (symout_time
, dwarf2out_decl (decl
));
4446 exit_rest_of_compilation
:
4450 /* In case the function was not output,
4451 don't leave any temporary anonymous types
4452 queued up for sdb output. */
4453 #ifdef SDB_DEBUGGING_INFO
4454 if (write_symbols
== SDB_DEBUG
)
4455 sdbout_types (NULL_TREE
);
4458 /* Put back the tree of subblocks and list of arguments
4459 from before we copied them.
4460 Code generation and the output of debugging info may have modified
4461 the copy, but the original is unchanged. */
4463 if (saved_block_tree
!= 0)
4465 DECL_INITIAL (decl
) = saved_block_tree
;
4466 DECL_ARGUMENTS (decl
) = saved_arguments
;
4467 DECL_ABSTRACT_ORIGIN (decl
) = NULL_TREE
;
4470 reload_completed
= 0;
4471 flow2_completed
= 0;
4474 TIMEVAR (final_time
,
4476 /* Clear out the insn_length contents now that they are no
4478 init_insn_lengths ();
4480 /* Clear out the real_constant_chain before some of the rtx's
4481 it runs through become garbage. */
4482 clear_const_double_mem ();
4484 /* Cancel the effect of rtl_in_current_obstack. */
4485 resume_temporary_allocation ();
4487 /* Show no temporary slots allocated. */
4490 free_basic_block_vars (0);
4493 /* Make sure volatile mem refs aren't considered valid operands for
4494 arithmetic insns. We must call this here if this is a nested inline
4495 function, since the above code leaves us in the init_recog state
4496 (from final.c), and the function context push/pop code does not
4497 save/restore volatile_ok.
4499 ??? Maybe it isn't necessary for expand_start_function to call this
4500 anymore if we do it here? */
4502 init_recog_no_volatile ();
4504 /* We're done with this function. Free up memory if we can. */
4505 free_after_parsing (current_function
);
4506 if (! DECL_DEFER_OUTPUT (decl
))
4507 free_after_compilation (current_function
);
4508 current_function
= 0;
4513 /* The parsing time is all the time spent in yyparse
4514 *except* what is spent in this function. */
4516 parse_time
-= get_run_time () - start_time
;
4527 printf ("Usage: %s input [switches]\n", progname
);
4528 printf ("Switches:\n");
4530 printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
4531 printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
4532 printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
4533 printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
4535 for (i
= NUM_ELEM (f_options
); i
--;)
4537 const char * description
= f_options
[i
].description
;
4539 if (description
!= NULL
&& * description
!= 0)
4540 printf (" -f%-21s %s\n",
4541 f_options
[i
].string
, description
);
4544 printf (" -O[number] Set optimisation level to [number]\n");
4545 printf (" -Os Optimise for space rather than speed\n");
4546 printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
4547 printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
4548 printf (" -w Suppress warnings\n");
4549 printf (" -W Enable extra warnings\n");
4551 for (i
= NUM_ELEM (W_options
); i
--;)
4553 const char * description
= W_options
[i
].description
;
4555 if (description
!= NULL
&& * description
!= 0)
4556 printf (" -W%-21s %s\n",
4557 W_options
[i
].string
, description
);
4560 printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
4561 printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
4562 printf (" -p Enable function profiling\n");
4563 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
4564 printf (" -a Enable block profiling \n");
4566 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
4567 printf (" -ax Enable jump profiling \n");
4569 printf (" -o <file> Place output into <file> \n");
4570 printf (" -G <number> Put global and static data smaller than <number>\n");
4571 printf (" bytes into a special section (on some targets)\n");
4573 for (i
= NUM_ELEM (debug_args
); i
--;)
4575 if (debug_args
[i
].description
!= NULL
)
4576 printf (" -g%-21s %s\n", debug_args
[i
].arg
, debug_args
[i
].description
);
4579 printf (" -aux-info <file> Emit declaration info into <file>.X\n");
4580 printf (" -quiet Do not display functions compiled or elapsed time\n");
4581 printf (" -version Display the compiler's version\n");
4582 printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
4583 printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
4584 #if defined INSN_SCHEDULING
4585 printf (" -sched-verbose=<number> Set the verbosity level of the scheduler\n");
4587 printf (" --help Display this information\n");
4592 /* Display descriptions of language specific options.
4593 If there is no description, note that there is an undocumented option.
4594 If the description is empty, do not display anything. (This allows
4595 options to be deliberately undocumented, for whatever reason).
4596 If the option string is missing, then this is a marker, indicating
4597 that the description string is in fact the name of a language, whose
4598 language specific options are to follow. */
4600 if (NUM_ELEM (documented_lang_options
) > 1)
4602 printf ("\nLanguage specific options:\n");
4604 for (i
= 0; i
< NUM_ELEM (documented_lang_options
); i
++)
4606 const char * description
= documented_lang_options
[i
].description
;
4607 const char * option
= documented_lang_options
[i
].option
;
4609 if (description
== NULL
)
4614 printf (" %-23.23s [undocumented]\n", option
);
4616 else if (* description
== 0)
4618 else if (option
== NULL
)
4622 ("\nThere are undocumented %s specific options as well.\n",
4626 printf ("\n Options for %s:\n", description
);
4631 printf (" %-23.23s %s\n", option
, description
);
4636 printf ("\nThere are undocumented %s specific options as well.\n", lang
);
4638 if (NUM_ELEM (target_switches
) > 1
4639 #ifdef TARGET_OPTIONS
4640 || NUM_ELEM (target_options
) > 1
4648 printf ("\nTarget specific options:\n");
4650 for (i
= NUM_ELEM (target_switches
); i
--;)
4652 const char * option
= target_switches
[i
].name
;
4653 const char * description
= target_switches
[i
].description
;
4655 if (option
== NULL
|| * option
== 0)
4657 else if (description
== NULL
)
4662 printf (" -m%-21.21s [undocumented]\n", option
);
4664 else if (* description
!= 0)
4665 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
4668 #ifdef TARGET_OPTIONS
4669 for (i
= NUM_ELEM (target_options
); i
--;)
4671 const char * option
= target_options
[i
].prefix
;
4672 const char * description
= target_options
[i
].description
;
4674 if (option
== NULL
|| * option
== 0)
4676 else if (description
== NULL
)
4681 printf (" -m%-21.21s [undocumented]\n", option
);
4683 else if (* description
!= 0)
4684 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
4690 printf ("\nThere are undocumented target specific options as well.\n");
4692 printf (" They exist, but they are not documented.\n");
4697 /* Parse a -d... comand line switch. */
4700 decode_d_option (arg
)
4707 branch_prob_dump
= 1;
4714 global_reg_dump
= 1;
4730 #ifdef MACHINE_DEPENDENT_REORG
4731 mach_dep_reorg_dump
= 1;
4739 branch_prob_dump
= 1;
4756 global_reg_dump
= 1;
4781 #ifdef MACHINE_DEPENDENT_REORG
4783 mach_dep_reorg_dump
= 1;
4787 flag_print_asm_name
= 1;
4808 graph_dump_format
= vcg
;
4814 rtl_dump_and_exit
= 1;
4822 case 'D': /* These are handled by the preprocessor. */
4826 warning ("unrecognised gcc debugging option: %c", arg
[-1]);
4831 /* Parse a -f... comand line switch. ARG is the value after the -f.
4832 It is safe to access 'ARG - 2' to generate the full switch name.
4833 Return the number of strings consumed. */
4836 decode_f_option (arg
)
4841 /* Search for the option in the table of binary f options. */
4842 for (j
= sizeof (f_options
) / sizeof (f_options
[0]); j
--;)
4844 if (!strcmp (arg
, f_options
[j
].string
))
4846 *f_options
[j
].variable
= f_options
[j
].on_value
;
4850 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4851 && ! strcmp (arg
+ 3, f_options
[j
].string
))
4853 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
4858 if (!strncmp (arg
, "inline-limit-", 13)
4859 || !strncmp (arg
, "inline-limit=", 13))
4861 read_integral_parameter (arg
+ 13, arg
- 2, inline_max_insns
);
4862 #ifdef INSN_SCHEDULING
4863 else if (!strncmp (arg
, "sched-verbose=", 14))
4864 fix_sched_param ("verbose", (const char *)(arg
+ 14));
4866 else if (!strncmp (arg
, "fixed-", 6))
4867 fix_register ((const char *)(arg
+ 6), 1, 1);
4868 else if (!strncmp (arg
, "call-used-", 10))
4869 fix_register ((const char *)(arg
+ 10), 0, 1);
4870 else if (!strncmp (arg
, "call-saved-", 11))
4871 fix_register ((const char *)(arg
+ 11), 0, 0);
4872 else if (!strncmp (arg
, "align-loops=", 12))
4873 align_loops
= read_integral_parameter (arg
+ 12, arg
- 2, align_loops
);
4874 else if (!strncmp (arg
, "align-functions=", 16))
4876 read_integral_parameter (arg
+ 16, arg
- 2, align_functions
);
4877 else if (!strncmp (arg
, "align-jumps=", 12))
4878 align_jumps
= read_integral_parameter (arg
+ 12, arg
- 2, align_jumps
);
4879 else if (!strncmp (arg
, "align-labels=", 13))
4880 align_labels
= read_integral_parameter (arg
+ 13, arg
- 2, align_labels
);
4881 else if (!strcmp (arg
, "preprocessed"))
4882 /* Recognise this switch but do nothing. This prevents warnings
4883 about an unrecognised switch if cpplib has not been linked in. */
4891 /* Parse a -W... comand line switch. ARG is the value after the -W.
4892 It is safe to access 'ARG - 2' to generate the full switch name.
4893 Return the number of strings consumed. */
4895 decode_W_option (arg
)
4900 /* Search for the option in the table of binary W options. */
4902 for (j
= sizeof (W_options
) / sizeof (W_options
[0]); j
--;)
4904 if (!strcmp (arg
, W_options
[j
].string
))
4906 *W_options
[j
].variable
= W_options
[j
].on_value
;
4910 if (arg
[0] == 'n' && arg
[1] == 'o' && arg
[2] == '-'
4911 && ! strcmp (arg
+ 3, W_options
[j
].string
))
4913 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
4918 if (!strncmp (arg
, "id-clash-", 9))
4920 const int id_clash_val
= read_integral_parameter (arg
+ 9, arg
- 2, -1);
4922 if (id_clash_val
!= -1)
4924 id_clash_len
= id_clash_val
;
4928 else if (!strncmp (arg
, "larger-than-", 12))
4930 const int larger_than_val
=
4931 read_integral_parameter (arg
+ 12, arg
- 2, -1);
4932 if (larger_than_val
!= -1)
4934 larger_than_size
= larger_than_val
;
4935 warn_larger_than
= 1;
4944 /* Parse a -g... comand line switch. ARG is the value after the -g.
4945 It is safe to access 'ARG - 2' to generate the full switch name.
4946 Return the number of strings consumed. */
4949 decode_g_option (arg
)
4953 /* A lot of code assumes write_symbols == NO_DEBUG if the
4954 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4955 of what debugging type has been selected). This records the
4956 selected type. It is an error to specify more than one
4958 static enum debug_info_type selected_debug_type
= NO_DEBUG
;
4959 /* Non-zero if debugging format has been explicitly set.
4960 -g and -ggdb don't explicitly set the debugging format so
4961 -gdwarf -g3 is equivalent to -gdwarf3. */
4962 static int type_explicitly_set_p
= 0;
4963 /* Indexed by enum debug_info_type. */
4964 static const char * debug_type_names
[] =
4966 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4969 /* The maximum admissible debug level value. */
4970 static const unsigned max_debug_level
= 3;
4972 /* Look up ARG in the table. */
4973 for (da
= debug_args
; da
->arg
; da
++)
4975 const int da_len
= strlen (da
->arg
);
4977 if (da_len
== 0 || ! strncmp (arg
, da
->arg
, da_len
))
4979 enum debug_info_type type
= da
->debug_type
;
4980 const char * p
= arg
+ da_len
;
4982 if (*p
&& (*p
< '0' || *p
> '9'))
4985 /* A debug flag without a level defaults to level 2.
4986 Note we do not want to call read_integral_parameter
4987 for that case since it will call atoi which
4990 ??? We may want to generalize the interface to
4991 read_integral_parameter to better handle this case
4992 if this case shows up often. */
4994 level
= read_integral_parameter (p
, 0, max_debug_level
+ 1);
4998 if (da_len
> 1 && *p
&& !strncmp (arg
, "dwarf", da_len
))
5000 error ("use -gdwarf -g%d for DWARF v1, level %d",
5003 error ("use -gdwarf-2 for DWARF v2");
5006 if (level
> max_debug_level
)
5009 ignoring option `%s' due to invalid debug level specification",
5011 level
= debug_info_level
;
5014 if (type
== NO_DEBUG
)
5016 type
= PREFERRED_DEBUGGING_TYPE
;
5018 if (da_len
> 1 && strncmp (arg
, "gdb", da_len
) == 0)
5020 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
5021 type
= DWARF2_DEBUG
;
5023 #ifdef DBX_DEBUGGING_INFO
5030 if (type
== NO_DEBUG
)
5031 warning ("`%s': unknown or unsupported -g option", arg
- 2);
5033 /* Does it conflict with an already selected type? */
5034 if (type_explicitly_set_p
5035 /* -g/-ggdb don't conflict with anything */
5036 && da
->debug_type
!= NO_DEBUG
5037 && type
!= selected_debug_type
)
5038 warning ("`%s' ignored, conflicts with `-g%s'",
5039 arg
- 2, debug_type_names
[(int) selected_debug_type
]);
5042 /* If the format has already been set, -g/-ggdb
5043 only change the debug level. */
5044 if (type_explicitly_set_p
&& da
->debug_type
== NO_DEBUG
)
5045 ; /* don't change debugging type */
5048 selected_debug_type
= type
;
5049 type_explicitly_set_p
= da
->debug_type
!= NO_DEBUG
;
5052 write_symbols
= (level
== 0
5054 : selected_debug_type
);
5055 use_gnu_debug_info_extensions
= da
->use_extensions_p
;
5056 debug_info_level
= (enum debug_info_level
) level
;
5064 warning ("`%s': unknown or unsupported -g option", arg
- 2);
5069 /* Decode the first argument in the argv as a language-independent option.
5070 Return the number of strings consumed. 'strings_processed' is the
5071 number of strings that have already been decoded in a language
5072 specific fashion before this function was invoked. */
5075 independent_decode_option (argc
, argv
, strings_processed
)
5078 unsigned strings_processed ATTRIBUTE_UNUSED
;
5080 char * arg
= argv
[0];
5082 if (arg
[0] != '-' || arg
[1] == 0)
5094 if (!strcmp (arg
, "-help"))
5109 /* Already been treated in main (). Do nothing. */
5113 set_target_switch (arg
+ 1);
5117 return decode_f_option (arg
+ 1);
5120 return decode_g_option (arg
+ 1);
5123 if (!strcmp (arg
, "dumpbase"))
5128 dump_base_name
= argv
[1];
5132 decode_d_option (arg
+ 1);
5136 if (!strcmp (arg
, "pedantic"))
5138 else if (!strcmp (arg
, "pedantic-errors"))
5139 flag_pedantic_errors
= pedantic
= 1;
5140 else if (arg
[1] == 0)
5147 if (!strcmp (arg
, "quiet"))
5154 if (!strcmp (arg
, "version"))
5162 inhibit_warnings
= 1;
5171 /* We save the value of warn_uninitialized, since if they put
5172 -Wuninitialized on the command line, we need to generate a
5173 warning about not using it without also specifying -O. */
5174 if (warn_uninitialized
!= 1)
5175 warn_uninitialized
= 2;
5178 return decode_W_option (arg
+ 1);
5184 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
5185 warning ("`-a' option (basic block profile) not supported");
5187 profile_block_flag
= (profile_block_flag
< 2) ? 1 : 3;
5190 else if (!strcmp (arg
, "ax"))
5192 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
5193 warning ("`-ax' option (jump profiling) not supported");
5195 profile_block_flag
= (!profile_block_flag
5196 || profile_block_flag
== 2) ? 2 : 3;
5199 else if (!strncmp (arg
, "aux-info", 8))
5201 flag_gen_aux_info
= 1;
5207 aux_info_file_name
= argv
[1];
5211 aux_info_file_name
= arg
+ 8;
5223 asm_file_name
= argv
[1];
5238 g_switch_val
= read_integral_parameter (argv
[1], 0, -1);
5243 g_switch_val
= read_integral_parameter (arg
+ 1, 0, -1);
5247 if (g_switch_val
== -1)
5251 g_switch_set
= TRUE
;
5252 g_switch_value
= g_switch_val
;
5262 /* Entry point of cc1/c++. Decode command args, then call compile_file.
5263 Exit code is 35 if can't open files, 34 if fatal error,
5264 33 if had nonfatal errors, else success. */
5266 extern int main
PROTO ((int, char **));
5276 /* save in case md file wants to emit args as a comment. */
5280 p
= argv
[0] + strlen (argv
[0]);
5281 while (p
!= argv
[0] && p
[-1] != '/'
5282 #ifdef DIR_SEPARATOR
5283 && p
[-1] != DIR_SEPARATOR
5289 #if defined (RLIMIT_STACK) && defined (HAVE_GETRLIMIT) && defined (HAVE_SETRLIMIT)
5290 /* Get rid of any avoidable limit on stack size. */
5294 /* Set the stack limit huge so that alloca does not fail. */
5295 getrlimit (RLIMIT_STACK
, &rlim
);
5296 rlim
.rlim_cur
= rlim
.rlim_max
;
5297 setrlimit (RLIMIT_STACK
, &rlim
);
5301 #ifdef HAVE_LC_MESSAGES
5302 setlocale (LC_MESSAGES
, "");
5304 (void) bindtextdomain (PACKAGE
, localedir
);
5305 (void) textdomain (PACKAGE
);
5307 signal (SIGFPE
, float_signal
);
5310 signal (SIGPIPE
, pipe_closed
);
5313 decl_printable_name
= decl_name
;
5314 lang_expand_expr
= (lang_expand_expr_t
) do_abort
;
5316 /* Initialize whether `char' is signed. */
5317 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
5318 #ifdef DEFAULT_SHORT_ENUMS
5319 /* Initialize how much space enums occupy, by default. */
5320 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
5323 /* Initialize the garbage-collector. */
5325 ggc_add_root (&input_file_stack
, 1, sizeof input_file_stack
,
5328 /* Perform language-specific options intialization. */
5329 lang_init_options ();
5331 /* Scan to see what optimization level has been specified. That will
5332 determine the default value of many flags. */
5333 for (i
= 1; i
< argc
; i
++)
5335 if (!strcmp (argv
[i
], "-O"))
5340 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
5342 /* Handle -Os, -O2, -O3, -O69, ... */
5343 char *p
= &argv
[i
][2];
5345 if ((p
[0] == 's') && (p
[1] == 0))
5349 /* Optimizing for size forces optimize to be 2. */
5354 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
5355 if (optimize_val
!= -1)
5357 optimize
= optimize_val
;
5364 obey_regdecls
= (optimize
== 0);
5369 flag_thread_jumps
= 1;
5371 flag_delayed_branch
= 1;
5373 #ifdef CAN_DEBUG_WITHOUT_FP
5374 flag_omit_frame_pointer
= 1;
5380 flag_cse_follow_jumps
= 1;
5381 flag_cse_skip_blocks
= 1;
5383 flag_expensive_optimizations
= 1;
5384 flag_strength_reduce
= 1;
5385 flag_rerun_cse_after_loop
= 1;
5386 flag_rerun_loop_opt
= 1;
5387 flag_caller_saves
= 1;
5390 #ifdef INSN_SCHEDULING
5391 flag_schedule_insns
= 1;
5392 flag_schedule_insns_after_reload
= 1;
5395 flag_strict_aliasing
= 1;
5396 flag_delete_null_pointer_checks
= 1;
5401 flag_inline_functions
= 1;
5404 if (optimize
< 2 || optimize_size
)
5409 align_functions
= 1;
5412 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
5415 set_target_switch ("");
5417 #ifdef OPTIMIZATION_OPTIONS
5418 /* Allow default optimizations to be specified on a per-machine basis. */
5419 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
5422 /* Initialize register usage now so switches may override. */
5425 /* Perform normal command line switch decoding. */
5426 for (i
= 1; i
< argc
;)
5428 unsigned lang_processed
;
5429 unsigned indep_processed
;
5431 /* Give the language a chance to decode the option for itself. */
5432 lang_processed
= lang_decode_option (argc
- i
, argv
+ i
);
5434 /* Now see if the option also has a language independent meaning.
5435 Some options are both language specific and language independent,
5436 eg --help. It is possible that there might be options that should
5437 only be decoded in a language independent way if the were not
5438 decoded in a langauge specific way, which is why 'lang_processed'
5440 indep_processed
= independent_decode_option (argc
- i
, argv
+ i
,
5443 if (lang_processed
|| indep_processed
)
5444 i
+= (lang_processed
> indep_processed
5445 ? lang_processed
: indep_processed
);
5448 const char * option
= NULL
;
5449 const char * lang
= NULL
;
5452 /* It is possible that the command line switch is not valid for the
5453 current language, but it is valid for another language. In order
5454 to be compatible with previous versions of the compiler (which
5455 did not issue an error message in this case) we check for this
5456 possibilty here. If we do find a match, then if extra_warnings
5457 is set we generate a warning message, otherwise we will just
5458 ignore the option. */
5459 for (j
= 0; j
< NUM_ELEM (documented_lang_options
); j
++)
5461 option
= documented_lang_options
[j
].option
;
5464 lang
= documented_lang_options
[j
].description
;
5465 else if (! strncmp (argv
[i
], option
, strlen (option
)))
5473 warning ("Ignoring command line option '%s'", argv
[i
]);
5476 (It is valid for %s but not the selected langauge)", lang
);
5480 error ("Unrecognised option `%s'", argv
[i
]);
5486 /* Checker uses the frame pointer. */
5487 if (flag_check_memory_usage
)
5488 flag_omit_frame_pointer
= 0;
5492 /* Inlining does not work if not optimizing,
5493 so force it not to be done. */
5497 /* The c_decode_option and lang_decode_option functions set
5498 this to `2' if -Wall is used, so we can avoid giving out
5499 lots of errors for people who don't realize what -Wall does. */
5500 if (warn_uninitialized
== 1)
5501 warning ("-Wuninitialized is not supported without -O");
5504 #ifdef OVERRIDE_OPTIONS
5505 /* Some machines may reject certain combinations of options. */
5509 if (exceptions_via_longjmp
== 2)
5511 #ifdef DWARF2_UNWIND_INFO
5512 exceptions_via_longjmp
= ! DWARF2_UNWIND_INFO
;
5514 exceptions_via_longjmp
= 1;
5518 /* Set up the align_*_log variables, defaulting them to 1 if they
5519 were still unset. */
5520 if (align_loops
<= 0) align_loops
= 1;
5521 align_loops_log
= floor_log2 (align_loops
*2-1);
5522 if (align_jumps
<= 0) align_jumps
= 1;
5523 align_jumps_log
= floor_log2 (align_jumps
*2-1);
5524 if (align_labels
<= 0) align_labels
= 1;
5525 align_labels_log
= floor_log2 (align_labels
*2-1);
5526 if (align_functions
<= 0) align_functions
= 1;
5527 align_functions_log
= floor_log2 (align_functions
*2-1);
5529 if (profile_block_flag
== 3)
5531 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
5532 profile_block_flag
= 2;
5535 /* Unrolling all loops implies that standard loop unrolling must also
5537 if (flag_unroll_all_loops
)
5538 flag_unroll_loops
= 1;
5539 /* Loop unrolling requires that strength_reduction be on also. Silently
5540 turn on strength reduction here if it isn't already on. Also, the loop
5541 unrolling code assumes that cse will be run after loop, so that must
5542 be turned on also. */
5543 if (flag_unroll_loops
)
5545 flag_strength_reduce
= 1;
5546 flag_rerun_cse_after_loop
= 1;
5549 /* Warn about options that are not supported on this machine. */
5550 #ifndef INSN_SCHEDULING
5551 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
5552 warning ("instruction scheduling not supported on this target machine");
5555 if (flag_delayed_branch
)
5556 warning ("this target machine does not have delayed branches");
5559 user_label_prefix
= USER_LABEL_PREFIX
;
5560 if (flag_leading_underscore
!= -1)
5562 /* If the default prefix is more complicated than "" or "_",
5563 issue a warning and ignore this option. */
5564 if (user_label_prefix
[0] == 0 ||
5565 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
5567 user_label_prefix
= flag_leading_underscore
? "_" : "";
5570 warning ("-f%sleading-underscore not supported on this target machine",
5571 flag_leading_underscore
? "" : "no-");
5574 /* If we are in verbose mode, write out the version and maybe all the
5575 option flags in use. */
5578 print_version (stderr
, "");
5580 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
5583 compile_file (filename
);
5585 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
5588 char *lim
= (char *) sbrk (0);
5590 notice ("Data size %ld.\n", (long) (lim
- (char *) &environ
));
5595 system ("ps -l 1>&2");
5598 #endif /* not USG */
5601 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
5604 return (FATAL_EXIT_CODE
);
5606 return (FATAL_EXIT_CODE
);
5607 return (SUCCESS_EXIT_CODE
);
5610 /* Decode -m switches. */
5611 /* Decode the switch -mNAME. */
5614 set_target_switch (name
)
5618 int valid_target_option
= 0;
5620 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
5621 if (!strcmp (target_switches
[j
].name
, name
))
5623 if (target_switches
[j
].value
< 0)
5624 target_flags
&= ~-target_switches
[j
].value
;
5626 target_flags
|= target_switches
[j
].value
;
5627 valid_target_option
= 1;
5630 #ifdef TARGET_OPTIONS
5631 if (!valid_target_option
)
5632 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
5634 int len
= strlen (target_options
[j
].prefix
);
5635 if (!strncmp (target_options
[j
].prefix
, name
, len
))
5637 *target_options
[j
].variable
= name
+ len
;
5638 valid_target_option
= 1;
5643 if (!valid_target_option
)
5644 error ("Invalid option `%s'", name
);
5647 /* Print version information to FILE.
5648 Each line begins with INDENT (for the case where FILE is the
5649 assembler output file). */
5652 print_version (file
, indent
)
5657 #define __VERSION__ "[?]"
5661 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
5663 "%s%s%s version %s (%s) compiled by CC.\n"
5665 , indent
, *indent
!= 0 ? " " : "",
5666 language_string
, version_string
, TARGET_NAME
, __VERSION__
);
5669 /* Print an option value and return the adjusted position in the line.
5670 ??? We don't handle error returns from fprintf (disk full); presumably
5671 other code will catch a disk full though. */
5674 print_single_switch (file
, pos
, max
, indent
, sep
, term
, type
, name
)
5677 const char *indent
, *sep
, *term
, *type
, *name
;
5679 /* The ultrix fprintf returns 0 on success, so compute the result we want
5680 here since we need it for the following test. */
5681 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
5686 fprintf (file
, "%s", term
);
5691 fprintf (file
, "%s", indent
);
5692 pos
= strlen (indent
);
5694 fprintf (file
, "%s%s%s", sep
, type
, name
);
5699 /* Print active target switches to FILE.
5700 POS is the current cursor position and MAX is the size of a "line".
5701 Each line begins with INDENT and ends with TERM.
5702 Each switch is separated from the next by SEP. */
5705 print_switch_values (file
, pos
, max
, indent
, sep
, term
)
5708 const char *indent
, *sep
, *term
;
5713 /* Print the options as passed. */
5715 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
5716 _("options passed: "), "");
5718 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
5722 if (strcmp (*p
, "-o") == 0)
5728 if (strcmp (*p
, "-quiet") == 0)
5730 if (strcmp (*p
, "-version") == 0)
5735 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
5738 fprintf (file
, "%s", term
);
5740 /* Print the -f and -m options that have been enabled.
5741 We don't handle language specific options but printing argv
5744 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
5745 _("options enabled: "), "");
5747 for (j
= 0; j
< sizeof f_options
/ sizeof f_options
[0]; j
++)
5748 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
5749 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5750 "-f", f_options
[j
].string
);
5752 /* Print target specific options. */
5754 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
5755 if (target_switches
[j
].name
[0] != '\0'
5756 && target_switches
[j
].value
> 0
5757 && ((target_switches
[j
].value
& target_flags
)
5758 == target_switches
[j
].value
))
5760 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5761 "-m", target_switches
[j
].name
);
5764 #ifdef TARGET_OPTIONS
5765 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
5766 if (*target_options
[j
].variable
!= NULL
)
5769 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
5770 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5771 prefix
, *target_options
[j
].variable
);
5775 fprintf (file
, "%s", term
);
5778 /* Record the beginning of a new source file, named FILENAME. */
5781 debug_start_source_file (filename
)
5782 register char *filename ATTRIBUTE_UNUSED
;
5784 #ifdef DBX_DEBUGGING_INFO
5785 if (write_symbols
== DBX_DEBUG
)
5786 dbxout_start_new_source_file (filename
);
5788 #ifdef DWARF_DEBUGGING_INFO
5789 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5790 && write_symbols
== DWARF_DEBUG
)
5791 dwarfout_start_new_source_file (filename
);
5792 #endif /* DWARF_DEBUGGING_INFO */
5793 #ifdef DWARF2_DEBUGGING_INFO
5794 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5795 && write_symbols
== DWARF2_DEBUG
)
5796 dwarf2out_start_source_file (filename
);
5797 #endif /* DWARF2_DEBUGGING_INFO */
5798 #ifdef SDB_DEBUGGING_INFO
5799 if (write_symbols
== SDB_DEBUG
)
5800 sdbout_start_new_source_file (filename
);
5804 /* Record the resumption of a source file. LINENO is the line number in
5805 the source file we are returning to. */
5808 debug_end_source_file (lineno
)
5809 register unsigned lineno ATTRIBUTE_UNUSED
;
5811 #ifdef DBX_DEBUGGING_INFO
5812 if (write_symbols
== DBX_DEBUG
)
5813 dbxout_resume_previous_source_file ();
5815 #ifdef DWARF_DEBUGGING_INFO
5816 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5817 && write_symbols
== DWARF_DEBUG
)
5818 dwarfout_resume_previous_source_file (lineno
);
5819 #endif /* DWARF_DEBUGGING_INFO */
5820 #ifdef DWARF2_DEBUGGING_INFO
5821 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5822 && write_symbols
== DWARF2_DEBUG
)
5823 dwarf2out_end_source_file ();
5824 #endif /* DWARF2_DEBUGGING_INFO */
5825 #ifdef SDB_DEBUGGING_INFO
5826 if (write_symbols
== SDB_DEBUG
)
5827 sdbout_resume_previous_source_file ();
5831 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5832 the tail part of the directive line, i.e. the part which is past the
5833 initial whitespace, #, whitespace, directive-name, whitespace part. */
5836 debug_define (lineno
, buffer
)
5837 register unsigned lineno ATTRIBUTE_UNUSED
;
5838 register char *buffer ATTRIBUTE_UNUSED
;
5840 #ifdef DWARF_DEBUGGING_INFO
5841 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5842 && write_symbols
== DWARF_DEBUG
)
5843 dwarfout_define (lineno
, buffer
);
5844 #endif /* DWARF_DEBUGGING_INFO */
5845 #ifdef DWARF2_DEBUGGING_INFO
5846 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5847 && write_symbols
== DWARF2_DEBUG
)
5848 dwarf2out_define (lineno
, buffer
);
5849 #endif /* DWARF2_DEBUGGING_INFO */
5852 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5853 the tail part of the directive line, i.e. the part which is past the
5854 initial whitespace, #, whitespace, directive-name, whitespace part. */
5857 debug_undef (lineno
, buffer
)
5858 register unsigned lineno ATTRIBUTE_UNUSED
;
5859 register char *buffer ATTRIBUTE_UNUSED
;
5861 #ifdef DWARF_DEBUGGING_INFO
5862 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5863 && write_symbols
== DWARF_DEBUG
)
5864 dwarfout_undef (lineno
, buffer
);
5865 #endif /* DWARF_DEBUGGING_INFO */
5866 #ifdef DWARF2_DEBUGGING_INFO
5867 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5868 && write_symbols
== DWARF2_DEBUG
)
5869 dwarf2out_undef (lineno
, buffer
);
5870 #endif /* DWARF2_DEBUGGING_INFO */