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>
45 #include "insn-attr.h"
46 #include "insn-codes.h"
47 #include "insn-config.h"
55 #include "basic-block.h"
59 #ifdef DWARF_DEBUGGING_INFO
63 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
64 #include "dwarf2out.h"
67 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
71 #ifdef SDB_DEBUGGING_INFO
75 #ifdef XCOFF_DEBUGGING_INFO
80 /* The extra parameters substantially improve the I/O performance. */
82 vms_fopen (fname
, type
)
86 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
87 fixed arguments, which matches ANSI's specification but not VAXCRTL's
88 pre-ANSI implementation. This hack circumvents the mismatch problem. */
89 FILE *(*vmslib_fopen
)() = (FILE *(*)()) fopen
;
92 return (*vmslib_fopen
) (fname
, type
, "mbc=32",
93 "deq=64", "fop=tef", "shr=nil");
95 return (*vmslib_fopen
) (fname
, type
, "mbc=32");
97 #define fopen vms_fopen
100 #ifndef DEFAULT_GDB_EXTENSIONS
101 #define DEFAULT_GDB_EXTENSIONS 1
104 /* If more than one debugging type is supported, you must define
105 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
107 This is one long line cause VAXC can't handle a \-newline. */
108 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
109 #ifndef PREFERRED_DEBUGGING_TYPE
110 You Lose
! You must define PREFERRED_DEBUGGING_TYPE
!
111 #endif /* no PREFERRED_DEBUGGING_TYPE */
112 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
113 so the following code needn't care. */
114 #ifdef DBX_DEBUGGING_INFO
115 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
117 #ifdef SDB_DEBUGGING_INFO
118 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
120 #ifdef DWARF_DEBUGGING_INFO
121 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
123 #ifdef DWARF2_DEBUGGING_INFO
124 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
126 #ifdef XCOFF_DEBUGGING_INFO
127 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
129 #endif /* More than one debugger format enabled. */
131 /* If still not defined, must have been because no debugging formats
133 #ifndef PREFERRED_DEBUGGING_TYPE
134 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
137 #ifndef DIR_SEPARATOR
138 #define DIR_SEPARATOR '/'
141 #if ! (defined (VMS) || defined (OS2))
142 extern char **environ
;
144 extern char *version_string
;
146 /* Carry information from ASM_DECLARE_OBJECT_NAME
147 to ASM_FINISH_DECLARE_OBJECT. */
149 extern int size_directive_output
;
150 extern tree last_assemble_variable_decl
;
152 extern void init_decl_processing ();
153 extern void init_obstacks ();
154 extern void init_tree_codes ();
155 extern void init_regs ();
156 extern void init_optabs ();
157 extern void init_stmt ();
158 extern void init_reg_sets ();
159 extern void dump_flow_info ();
160 extern void dump_sched_info ();
161 extern void dump_local_alloc ();
162 extern void regset_release_memory ();
164 extern void print_rtl ();
165 extern void print_rtl_with_bb ();
167 void rest_of_decl_compilation ();
168 void error_with_file_and_line
PVPROTO((const char *file
,
169 int line
, const char *s
, ...));
170 void error_with_decl
PVPROTO((tree decl
, const char *s
, ...));
171 void error_for_asm
PVPROTO((rtx insn
, const char *s
, ...));
172 void notice
PVPROTO((const char *s
, ...));
173 void error
PVPROTO((const char *s
, ...));
174 void fatal
PVPROTO((const char *s
, ...));
175 void warning_with_file_and_line
PVPROTO((const char *file
,
176 int line
, const char *s
, ...));
177 void warning_with_decl
PVPROTO((tree decl
, const char *s
, ...));
178 void warning
PVPROTO((const char *s
, ...));
179 void pedwarn
PVPROTO((const char *s
, ...));
180 void pedwarn_with_decl
PVPROTO((tree decl
, const char *s
, ...));
181 void pedwarn_with_file_and_line
PVPROTO((const char *file
,
182 int line
, const char *s
, ...));
183 void sorry
PVPROTO((const char *s
, ...));
184 static void set_target_switch
PROTO((const char *));
185 static const char *decl_name
PROTO((tree
, int));
186 static void vmessage
PROTO((const char *, const char *, va_list));
187 static void v_message_with_file_and_line
PROTO((const char *, int, int,
188 const char *, va_list));
189 static void v_message_with_decl
PROTO((tree
, int, const char *, va_list));
190 static void file_and_line_for_asm
PROTO((rtx
, char **, int *));
191 static void v_error_with_file_and_line
PROTO((const char *, int,
192 const char *, va_list));
193 static void v_error_with_decl
PROTO((tree
, const char *, va_list));
194 static void v_error_for_asm
PROTO((rtx
, const char *, va_list));
195 static void verror
PROTO((const char *, va_list));
196 static void vfatal
PROTO((const char *, va_list)) ATTRIBUTE_NORETURN
;
197 static void v_warning_with_file_and_line
PROTO ((const char *, int,
198 const char *, va_list));
199 static void v_warning_with_decl
PROTO((tree
, const char *, va_list));
200 static void v_warning_for_asm
PROTO((rtx
, const char *, va_list));
201 static void vwarning
PROTO((const char *, va_list));
202 static void vpedwarn
PROTO((const char *, va_list));
203 static void v_pedwarn_with_decl
PROTO((tree
, const char *, va_list));
204 static void v_pedwarn_with_file_and_line
PROTO((const char *, int,
205 const char *, va_list));
206 static void vsorry
PROTO((const char *, va_list));
207 static void float_signal
PROTO((int)) ATTRIBUTE_NORETURN
;
208 static void pipe_closed
PROTO((int)) ATTRIBUTE_NORETURN
;
209 #ifdef ASM_IDENTIFY_LANGUAGE
210 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
211 static void output_lang_identify
PROTO((FILE *)) ATTRIBUTE_UNUSED
;
213 static void open_dump_file
PROTO((const char *, const char *));
214 static void close_dump_file
PROTO((void (*) (FILE *, rtx
), rtx
));
215 static void dump_rtl
PROTO((const char *, tree
, void (*) (FILE *, rtx
), rtx
));
216 static void clean_dump_file
PROTO((const char *));
217 static void compile_file
PROTO((char *));
218 static void display_help
PROTO ((void));
220 static void print_version
PROTO((FILE *, const char *));
221 static int print_single_switch
PROTO((FILE *, int, int, const char *,
222 const char *, const char *,
223 const char *, const char *));
224 static void print_switch_values
PROTO((FILE *, int, int, const char *,
225 const char *, const char *));
227 void print_rtl_graph_with_bb
PROTO ((const char *, const char *, rtx
));
228 void clean_graph_dump_file
PROTO ((const char *, const char *));
229 void finish_graph_dump_file
PROTO ((const char *, const char *));
230 /* Length of line when printing switch values. */
233 /* Name of program invoked, sans directories. */
237 /* Copy of arguments to main. */
241 /* Name of current original source file (what was input to cpp).
242 This comes from each #-command in the actual input. */
244 char *input_filename
;
246 /* Name of top-level original source file (what was input to cpp).
247 This comes from the #-command at the beginning of the actual input.
248 If there isn't any there, then this is the cc1 input file name. */
250 char *main_input_filename
;
252 /* Current line number in real source file. */
256 /* Nonzero if it is unsafe to create any new pseudo registers. */
259 /* Stack of currently pending input files. */
261 struct file_stack
*input_file_stack
;
263 /* Incremented on each change to input_file_stack. */
264 int input_file_stack_tick
;
266 /* Name to use as base of names for dump output files. */
268 const char *dump_base_name
;
270 /* Bit flags that specify the machine subtype we are compiling for.
271 Bits are tested using macros TARGET_... defined in the tm.h file
272 and set by `-m...' switches. Must be defined in rtlanal.c. */
274 extern int target_flags
;
276 /* Flags saying which kinds of debugging dump have been requested. */
279 int rtl_dump_and_exit
= 0;
280 int jump_opt_dump
= 0;
281 int addressof_dump
= 0;
286 int branch_prob_dump
= 0;
288 int combine_dump
= 0;
289 int regmove_dump
= 0;
291 int local_reg_dump
= 0;
292 int global_reg_dump
= 0;
294 int peephole2_dump
= 0;
296 int jump2_opt_dump
= 0;
298 int dbr_sched_dump
= 0;
300 int flag_print_asm_name
= 0;
302 int stack_reg_dump
= 0;
304 #ifdef MACHINE_DEPENDENT_REORG
305 int mach_dep_reorg_dump
= 0;
307 enum graph_dump_types graph_dump_format
;
309 /* Name for output file of assembly code, specified with -o. */
313 /* Value of the -G xx switch, and whether it was passed or not. */
317 /* Type(s) of debugging information we are producing (if any).
318 See flags.h for the definitions of the different possible
319 types of debugging information. */
320 enum debug_info_type write_symbols
= NO_DEBUG
;
322 /* Level of debugging information we are producing. See flags.h
323 for the definitions of the different possible levels. */
324 enum debug_info_level debug_info_level
= DINFO_LEVEL_NONE
;
326 /* Nonzero means use GNU-only extensions in the generated symbolic
327 debugging information. */
328 /* Currently, this only has an effect when write_symbols is set to
329 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
330 int use_gnu_debug_info_extensions
= 0;
332 /* Nonzero means do optimizations. -O.
333 Particular numeric values stand for particular amounts of optimization;
334 thus, -O2 stores 2 here. However, the optimizations beyond the basic
335 ones are not controlled directly by this variable. Instead, they are
336 controlled by individual `flag_...' variables that are defaulted
337 based on this variable. */
341 /* Nonzero means optimize for size. -Os.
342 The only valid values are zero and non-zero. When optimize_size is
343 non-zero, optimize defaults to 2, but certain individual code
344 bloating optimizations are disabled. */
346 int optimize_size
= 0;
348 /* Number of error messages and warning messages so far. */
351 int warningcount
= 0;
354 /* Pointer to function to compute the name to use to print a declaration.
355 DECL is the declaration in question.
356 VERBOSITY determines what information will be printed:
357 0: DECL_NAME, demangled as necessary.
358 1: and scope information.
359 2: and any other information that might be interesting, such as function
360 parameter types in C++. */
362 const char *(*decl_printable_name
) PROTO ((tree
, int));
364 /* Pointer to function to compute rtl for a language-specific tree code. */
366 typedef rtx (*lang_expand_expr_t
)
367 PROTO ((union tree_node
*, rtx
, enum machine_mode
,
368 enum expand_modifier modifier
));
370 lang_expand_expr_t lang_expand_expr
= 0;
372 tree (*lang_expand_constant
) PROTO((tree
)) = 0;
374 /* Pointer to function to finish handling an incomplete decl at the
375 end of compilation. */
377 void (*incomplete_decl_finalize_hook
) PROTO((tree
)) = 0;
379 /* Nonzero if generating code to do profiling. */
381 int profile_flag
= 0;
383 /* Nonzero if generating code to do profiling on a line-by-line basis. */
385 int profile_block_flag
;
387 /* Nonzero if generating code to profile program flow graph arcs. */
389 int profile_arc_flag
= 0;
391 /* Nonzero if generating info for gcov to calculate line test coverage. */
393 int flag_test_coverage
= 0;
395 /* Nonzero indicates that branch taken probabilities should be calculated. */
397 int flag_branch_probabilities
= 0;
399 /* Nonzero for -pedantic switch: warn about anything
400 that standard spec forbids. */
404 /* Temporarily suppress certain warnings.
405 This is set while reading code from a system header file. */
407 int in_system_header
= 0;
409 /* Nonzero means do stupid register allocation.
410 Currently, this is 1 if `optimize' is 0. */
412 int obey_regdecls
= 0;
414 /* Don't print functions as they are compiled and don't print
415 times taken by the various passes. -quiet. */
421 /* Nonzero means `char' should be signed. */
423 int flag_signed_char
;
425 /* Nonzero means give an enum type only as many bytes as it needs. */
427 int flag_short_enums
;
429 /* Nonzero for -fcaller-saves: allocate values in regs that need to
430 be saved across function calls, if that produces overall better code.
431 Optional now, so people can test it. */
433 #ifdef DEFAULT_CALLER_SAVES
434 int flag_caller_saves
= 1;
436 int flag_caller_saves
= 0;
439 /* Nonzero if structures and unions should be returned in memory.
441 This should only be defined if compatibility with another compiler or
442 with an ABI is needed, because it results in slower code. */
444 #ifndef DEFAULT_PCC_STRUCT_RETURN
445 #define DEFAULT_PCC_STRUCT_RETURN 1
448 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
450 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
452 /* Nonzero for -fforce-mem: load memory value into a register
453 before arithmetic on it. This makes better cse but slower compilation. */
455 int flag_force_mem
= 0;
457 /* Nonzero for -fforce-addr: load memory address into a register before
458 reference to memory. This makes better cse but slower compilation. */
460 int flag_force_addr
= 0;
462 /* Nonzero for -fdefer-pop: don't pop args after each function call;
463 instead save them up to pop many calls' args with one insns. */
465 int flag_defer_pop
= 0;
467 /* Nonzero for -ffloat-store: don't allocate floats and doubles
468 in extended-precision registers. */
470 int flag_float_store
= 0;
472 /* Nonzero for -fcse-follow-jumps:
473 have cse follow jumps to do a more extensive job. */
475 int flag_cse_follow_jumps
;
477 /* Nonzero for -fcse-skip-blocks:
478 have cse follow a branch around a block. */
479 int flag_cse_skip_blocks
;
481 /* Nonzero for -fexpensive-optimizations:
482 perform miscellaneous relatively-expensive optimizations. */
483 int flag_expensive_optimizations
;
485 /* Nonzero for -fthread-jumps:
486 have jump optimize output of loop. */
488 int flag_thread_jumps
;
490 /* Nonzero enables strength-reduction in loop.c. */
492 int flag_strength_reduce
= 0;
494 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
495 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
496 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
499 int flag_unroll_loops
;
501 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
502 This is generally not a win. */
504 int flag_unroll_all_loops
;
506 /* Nonzero forces all invariant computations in loops to be moved
509 int flag_move_all_movables
= 0;
511 /* Nonzero forces all general induction variables in loops to be
514 int flag_reduce_all_givs
= 0;
516 /* Nonzero to perform full register move optimization passes. This is the
519 int flag_regmove
= 0;
521 /* Nonzero for -fwritable-strings:
522 store string constants in data segment and don't uniquize them. */
524 int flag_writable_strings
= 0;
526 /* Nonzero means don't put addresses of constant functions in registers.
527 Used for compiling the Unix kernel, where strange substitutions are
528 done on the assembly output. */
530 int flag_no_function_cse
= 0;
532 /* Nonzero for -fomit-frame-pointer:
533 don't make a frame pointer in simple functions that don't require one. */
535 int flag_omit_frame_pointer
= 0;
537 /* Nonzero means place each function into its own section on those platforms
538 which support arbitrary section names and unlimited numbers of sections. */
540 int flag_function_sections
= 0;
542 /* ... and similar for data. */
544 int flag_data_sections
= 0;
546 /* Nonzero to inhibit use of define_optimization peephole opts. */
548 int flag_no_peephole
= 0;
550 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
551 operations in the interest of optimization. For example it allows
552 GCC to assume arguments to sqrt are nonnegative numbers, allowing
553 faster code for sqrt to be generated. */
555 int flag_fast_math
= 0;
557 /* Nonzero means the front end generally wants `errno' maintained by math
558 operations, like built-in SQRT, unless overridden by flag_fast_math. */
560 int flag_errno_math
= 1;
562 /* 0 means straightforward implementation of complex divide acceptable.
563 1 means wide ranges of inputs must work for complex divide.
564 2 means C9X-like requirements for complex divide (not yet implemented). */
566 int flag_complex_divide_method
= 0;
568 /* Nonzero means all references through pointers are volatile. */
572 /* Nonzero means treat all global and extern variables as volatile. */
574 int flag_volatile_global
;
576 /* Nonzero means treat all static variables as volatile. */
578 int flag_volatile_static
;
580 /* Nonzero means just do syntax checking; don't output anything. */
582 int flag_syntax_only
= 0;
584 /* Nonzero means perform global cse. */
586 static int flag_gcse
;
588 /* Nonzero means to rerun cse after loop optimization. This increases
589 compilation time about 20% and picks up a few more common expressions. */
591 static int flag_rerun_cse_after_loop
;
593 /* Nonzero means to run loop optimizations twice. */
595 int flag_rerun_loop_opt
;
597 /* Nonzero for -finline-functions: ok to inline functions that look like
598 good inline candidates. */
600 int flag_inline_functions
;
602 /* Nonzero for -fkeep-inline-functions: even if we make a function
603 go inline everywhere, keep its definition around for debugging
606 int flag_keep_inline_functions
;
608 /* Nonzero means that functions will not be inlined. */
612 /* Nonzero means that we should emit static const variables
613 regardless of whether or not optimization is turned on. */
615 int flag_keep_static_consts
= 1;
617 /* Nonzero means we should be saving declaration info into a .X file. */
619 int flag_gen_aux_info
= 0;
621 /* Specified name of aux-info file. */
623 static char *aux_info_file_name
;
625 /* Nonzero means make the text shared if supported. */
627 int flag_shared_data
;
629 /* Nonzero means schedule into delayed branch slots if supported. */
631 int flag_delayed_branch
;
633 /* Nonzero if we are compiling pure (sharable) code.
634 Value is 1 if we are doing reasonable (i.e. simple
635 offset into offset table) pic. Value is 2 if we can
636 only perform register offsets. */
640 /* Nonzero means generate extra code for exception handling and enable
641 exception handling. */
645 /* Nonzero means use the new model for exception handling. Replaces
646 -DNEW_EH_MODEL as a compile option. */
648 int flag_new_exceptions
= 1;
650 /* Nonzero means don't place uninitialized global data in common storage
655 /* Nonzero means pretend it is OK to examine bits of target floats,
656 even if that isn't true. The resulting code will have incorrect constants,
657 but the same series of instructions that the native compiler would make. */
659 int flag_pretend_float
;
661 /* Nonzero means change certain warnings into errors.
662 Usually these are warnings about failure to conform to some standard. */
664 int flag_pedantic_errors
= 0;
666 /* flag_schedule_insns means schedule insns within basic blocks (before
668 flag_schedule_insns_after_reload means schedule insns after
671 int flag_schedule_insns
= 0;
672 int flag_schedule_insns_after_reload
= 0;
674 /* The following flags have effect only for scheduling before register
677 flag_schedule_interblock means schedule insns accross basic blocks.
678 flag_schedule_speculative means allow speculative motion of non-load insns.
679 flag_schedule_speculative_load means allow speculative motion of some
681 flag_schedule_speculative_load_dangerous allows speculative motion of more
684 int flag_schedule_interblock
= 1;
685 int flag_schedule_speculative
= 1;
686 int flag_schedule_speculative_load
= 0;
687 int flag_schedule_speculative_load_dangerous
= 0;
689 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
690 by a cheaper branch, on a count register. */
691 int flag_branch_on_count_reg
;
693 /* -finhibit-size-directive inhibits output of .size for ELF.
694 This is used only for compiling crtstuff.c,
695 and it may be extended to other effects
696 needed for crtstuff.c on other systems. */
697 int flag_inhibit_size_directive
= 0;
699 /* -fverbose-asm causes extra commentary information to be produced in
700 the generated assembly code (to make it more readable). This option
701 is generally only of use to those who actually need to read the
702 generated assembly code (perhaps while debugging the compiler itself).
703 -fno-verbose-asm, the default, causes the extra information
704 to be omitted and is useful when comparing two assembler files. */
706 int flag_verbose_asm
= 0;
708 /* -dA causes debug commentary information to be produced in
709 the generated assembly code (to make it more readable). This option
710 is generally only of use to those who actually need to read the
711 generated assembly code (perhaps while debugging the compiler itself).
712 Currently, this switch is only used by dwarfout.c; however, it is intended
713 to be a catchall for printing debug information in the assembler file. */
715 int flag_debug_asm
= 0;
717 /* -fgnu-linker specifies use of the GNU linker for initializations.
718 (Or, more generally, a linker that handles initializations.)
719 -fno-gnu-linker says that collect2 will be used. */
721 int flag_gnu_linker
= 0;
723 int flag_gnu_linker
= 1;
726 /* Tag all structures with __attribute__(packed) */
727 int flag_pack_struct
= 0;
729 /* Emit code to check for stack overflow; also may cause large objects
730 to be allocated dynamically. */
731 int flag_stack_check
;
733 /* -fcheck-memory-usage causes extra code to be generated in order to check
734 memory accesses. This is used by a detector of bad memory accesses such
736 int flag_check_memory_usage
= 0;
738 /* -fprefix-function-name causes function name to be prefixed. This
739 can be used with -fcheck-memory-usage to isolate code compiled with
740 -fcheck-memory-usage. */
741 int flag_prefix_function_name
= 0;
743 /* 0 if pointer arguments may alias each other. True in C.
744 1 if pointer arguments may not alias each other but may alias
746 2 if pointer arguments may not alias each other and may not
747 alias global variables. True in Fortran.
748 This defaults to 0 for C. */
749 int flag_argument_noalias
= 0;
751 /* Nonzero if we should do (language-dependent) alias analysis.
752 Typically, this analysis will assume that expressions of certain
753 types do not alias expressions of certain other types. Only used
754 if alias analysis (in general) is enabled. */
755 int flag_strict_aliasing
= 0;
757 /* Instrument functions with calls at entry and exit, for profiling. */
758 int flag_instrument_function_entry_exit
= 0;
760 /* Nonzero means ignore `#ident' directives. 0 means handle them.
761 On SVR4 targets, it also controls whether or not to emit a
762 string identifying the compiler. */
764 int flag_no_ident
= 0;
766 /* This will perform a peephole pass before sched2. */
767 int flag_peephole2
= 0;
769 /* Values of the -falign-* flags: how much to align labels in code.
770 0 means `use default', 1 means `don't align'.
771 For each variable, there is an _log variant which is the power
772 of two not less than the variable, for .align output. */
779 int align_labels_log
;
781 int align_functions_log
;
783 /* Table of supported debugging formats. */
787 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
788 constant expression, we use NO_DEBUG in its place. */
789 enum debug_info_type debug_type
;
790 int use_extensions_p
;
791 const char * description
;
795 { "g", NO_DEBUG
, DEFAULT_GDB_EXTENSIONS
,
796 "Generate default debug format output" },
797 { "ggdb", NO_DEBUG
, 1, "Generate default extended debug format output" },
798 #ifdef DBX_DEBUGGING_INFO
799 { "gstabs", DBX_DEBUG
, 0, "Generate STABS format debug output" },
800 { "gstabs+", DBX_DEBUG
, 1, "Generate extended STABS format debug output" },
802 #ifdef DWARF_DEBUGGING_INFO
803 { "gdwarf", DWARF_DEBUG
, 0, "Generate DWARF-1 format debug output"},
804 { "gdwarf+", DWARF_DEBUG
, 1,
805 "Generated extended DWARF-1 format debug output" },
807 #ifdef DWARF2_DEBUGGING_INFO
808 { "gdwarf-2", DWARF2_DEBUG
, 0, "Enable DWARF-2 debug output" },
810 #ifdef XCOFF_DEBUGGING_INFO
811 { "gxcoff", XCOFF_DEBUG
, 0, "Generate XCOFF format debug output" },
812 { "gxcoff+", XCOFF_DEBUG
, 1, "Generate extended XCOFF format debug output" },
814 #ifdef SDB_DEBUGGING_INFO
815 { "gcoff", SDB_DEBUG
, 0, "Generate COFF format debug output" },
825 const char * description
;
827 lang_independent_options
;
829 /* Add or remove a leading underscore from user symbols. */
830 int flag_leading_underscore
= -1;
832 /* The user symbol prefix after having resolved same. */
833 const char *user_label_prefix
;
835 /* A default for same. */
836 #ifndef USER_LABEL_PREFIX
837 #define USER_LABEL_PREFIX ""
840 /* Table of language-independent -f options.
841 STRING is the option name. VARIABLE is the address of the variable.
842 ON_VALUE is the value to store in VARIABLE
843 if `-fSTRING' is seen as an option.
844 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
846 lang_independent_options f_options
[] =
848 {"float-store", &flag_float_store
, 1,
849 "Do not store floats in registers" },
850 {"volatile", &flag_volatile
, 1,
851 "Consider all mem refs through pointers as volatile"},
852 {"volatile-global", &flag_volatile_global
, 1,
853 "Consider all mem refs to global data to be volatile" },
854 {"volatile-static", &flag_volatile_static
, 1,
855 "Consider all mem refs to static data to be volatile" },
856 {"defer-pop", &flag_defer_pop
, 1,
857 "Defer popping functions args from stack until later" },
858 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1,
859 "When possible do not generate stack frames"},
860 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1,
861 "When running CSE, follow jumps to their targets" },
862 {"cse-skip-blocks", &flag_cse_skip_blocks
, 1,
863 "When running CSE, follow conditional jumps" },
864 {"expensive-optimizations", &flag_expensive_optimizations
, 1,
865 "Perform a number of minor, expensive optimisations" },
866 {"thread-jumps", &flag_thread_jumps
, 1,
867 "Perform jump threading optimisations"},
868 {"strength-reduce", &flag_strength_reduce
, 1,
869 "Perform strength reduction optimisations" },
870 {"unroll-loops", &flag_unroll_loops
, 1,
871 "Perform loop unrolling when iteration count is known" },
872 {"unroll-all-loops", &flag_unroll_all_loops
, 1,
873 "Perform loop unrolling for all loops" },
874 {"move-all-movables", &flag_move_all_movables
, 1,
875 "Force all loop invariant computations out of loops" },
876 {"reduce-all-givs", &flag_reduce_all_givs
, 1,
877 "Strength reduce all loop general induction variables" },
878 {"writable-strings", &flag_writable_strings
, 1,
879 "Store strings in writable data section" },
880 {"peephole", &flag_no_peephole
, 0,
881 "Enable machine specific peephole optimisations" },
882 {"force-mem", &flag_force_mem
, 1,
883 "Copy memory operands into registers before using" },
884 {"force-addr", &flag_force_addr
, 1,
885 "Copy memory address constants into regs before using" },
886 {"function-cse", &flag_no_function_cse
, 0,
887 "Allow function addresses to be held in registers" },
888 {"inline-functions", &flag_inline_functions
, 1,
889 "Integrate simple functions into their callers" },
890 {"keep-inline-functions", &flag_keep_inline_functions
, 1,
891 "Generate code for funcs even if they are fully inlined" },
892 {"inline", &flag_no_inline
, 0,
893 "Pay attention to the 'inline' keyword"},
894 {"keep-static-consts", &flag_keep_static_consts
, 1,
895 "Emit static const variables even if they are not used" },
896 {"syntax-only", &flag_syntax_only
, 1,
897 "Check for syntax errors, then stop" },
898 {"shared-data", &flag_shared_data
, 1,
899 "Mark data as shared rather than private" },
900 {"caller-saves", &flag_caller_saves
, 1,
901 "Enable saving registers around function calls" },
902 {"pcc-struct-return", &flag_pcc_struct_return
, 1,
903 "Return 'short' aggregates in memory, not registers" },
904 {"reg-struct-return", &flag_pcc_struct_return
, 0,
905 "Return 'short' aggregates in registers" },
906 {"delayed-branch", &flag_delayed_branch
, 1,
907 "Attempt to fill delay slots of branch instructions" },
908 {"gcse", &flag_gcse
, 1,
909 "Perform the global common subexpression elimination" },
910 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1,
911 "Run CSE pass after loop optimisations"},
912 {"rerun-loop-opt", &flag_rerun_loop_opt
, 1,
913 "Run the loop optimiser twice"},
914 {"pretend-float", &flag_pretend_float
, 1,
915 "Pretend that host and target use the same FP format"},
916 {"schedule-insns", &flag_schedule_insns
, 1,
917 "Reschedule instructions to avoid pipeline stalls"},
918 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1,
919 "Run two passes of the instruction scheduler"},
920 {"sched-interblock",&flag_schedule_interblock
, 1,
921 "Enable scheduling across basic blocks" },
922 {"sched-spec",&flag_schedule_speculative
, 1,
923 "Allow speculative motion of non-loads" },
924 {"sched-spec-load",&flag_schedule_speculative_load
, 1,
925 "Allow speculative motion of some loads" },
926 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous
, 1,
927 "Allow speculative motion of more loads" },
928 {"branch-count-reg",&flag_branch_on_count_reg
, 1,
929 "Replace add,compare,branch with branch on count reg"},
930 {"pic", &flag_pic
, 1,
931 "Generate position independent code, if possible"},
932 {"PIC", &flag_pic
, 2, ""},
933 {"exceptions", &flag_exceptions
, 1,
934 "Enable exception handling" },
935 {"new-exceptions", &flag_new_exceptions
, 1,
936 "Use the new model for exception handling" },
937 {"sjlj-exceptions", &exceptions_via_longjmp
, 1,
938 "Use setjmp/longjmp to handle exceptions" },
939 {"asynchronous-exceptions", &asynchronous_exceptions
, 1,
940 "Support asynchronous exceptions" },
941 {"profile-arcs", &profile_arc_flag
, 1,
942 "Insert arc based program profiling code" },
943 {"test-coverage", &flag_test_coverage
, 1,
944 "Create data files needed by gcov" },
945 {"branch-probabilities", &flag_branch_probabilities
, 1,
946 "Use profiling information for branch probabilities" },
947 {"fast-math", &flag_fast_math
, 1,
948 "Improve FP speed by violating ANSI & IEEE rules" },
949 {"common", &flag_no_common
, 0,
950 "Do not put unitialised globals in the common section" },
951 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1,
952 "Do not generate .size directives" },
953 {"function-sections", &flag_function_sections
, 1,
954 "place each function into its own section" },
955 {"data-sections", &flag_data_sections
, 1,
956 "place data items into their own section" },
957 {"verbose-asm", &flag_verbose_asm
, 1,
958 "Add extra commentry to assembler output"},
959 {"gnu-linker", &flag_gnu_linker
, 1,
960 "Output GNU ld formatted global initialisers"},
961 {"regmove", &flag_regmove
, 1,
962 "Enables a register move optimisation"},
963 {"optimize-register-move", &flag_regmove
, 1,
964 "Do the full regmove optimization pass"},
965 {"pack-struct", &flag_pack_struct
, 1,
966 "Pack structure members together without holes" },
967 {"stack-check", &flag_stack_check
, 1,
968 "Insert stack checking code into the program" },
969 {"argument-alias", &flag_argument_noalias
, 0,
970 "Specify that arguments may alias each other & globals"},
971 {"argument-noalias", &flag_argument_noalias
, 1,
972 "Assume arguments may alias globals but not each other"},
973 {"argument-noalias-global", &flag_argument_noalias
, 2,
974 "Assume arguments do not alias each other or globals" },
975 {"strict-aliasing", &flag_strict_aliasing
, 1,
976 "Assume strict aliasing rules apply" },
977 {"align-loops", &align_loops
, 0,
978 "Align the start of loops" },
979 {"align-jumps", &align_jumps
, 0,
980 "Align labels which are only reached by jumping" },
981 {"align-labels", &align_labels
, 0,
982 "Align all labels" },
983 {"align-functions", &align_functions
, 0,
984 "Align the start of functions" },
985 {"check-memory-usage", &flag_check_memory_usage
, 1,
986 "Generate code to check every memory access" },
987 {"prefix-function-name", &flag_prefix_function_name
, 1,
988 "Add a prefix to all function names" },
989 {"dump-unnumbered", &flag_dump_unnumbered
, 1,
990 "Suppress output of instruction numbers and line number notes in debugging dumps"},
991 {"instrument-functions", &flag_instrument_function_entry_exit
, 1,
992 "Instrument function entry/exit with profiling calls"},
993 {"leading-underscore", &flag_leading_underscore
, 1,
994 "External symbols have a leading underscore" },
995 {"ident", &flag_no_ident
, 0,
996 "Process #ident directives"},
997 { "peephole2", &flag_peephole2
, 1,
998 "Enables an rtl peephole pass run before sched2" }
1001 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1003 /* Table of language-specific options. */
1005 static struct lang_opt
1007 const char * option
;
1008 const char * description
;
1010 documented_lang_options
[] =
1012 /* In order not to overload the --help output, the convention
1013 used here is to only describe those options which are not
1014 enabled by default. */
1016 { "-ansi", "Compile just for ANSI C" },
1017 { "-fallow-single-precision",
1018 "Do not promote floats to double if using -traditional" },
1019 { "-std= ", "Determine language standard"},
1021 { "-fsigned-bitfields", "" },
1022 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1023 { "-fno-signed-bitfields", "" },
1024 { "-fno-unsigned-bitfields","" },
1025 { "-fsigned-char", "Make 'char' be signed by default"},
1026 { "-funsigned-char", "Make 'char' be unsigned by default"},
1027 { "-fno-signed-char", "" },
1028 { "-fno-unsigned-char", "" },
1030 { "-ftraditional", "" },
1031 { "-traditional", "Attempt to support traditional K&R style C"},
1032 { "-fnotraditional", "" },
1033 { "-fno-traditional", "" },
1036 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1037 { "-fbuiltin", "" },
1038 { "-fno-builtin", "Do not recognise any built in functions" },
1039 { "-fhosted", "Assume normal C execution environment" },
1040 { "-fno-hosted", "" },
1042 "Assume that standard libraries & main might not exist" },
1043 { "-fno-freestanding", "" },
1044 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1045 { "-fno-cond-mismatch", "" },
1046 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1047 { "-fno-dollars-in-identifiers", "" },
1048 { "-fpreprocessed", "" },
1049 { "-fno-preprocessed", "" },
1050 { "-fshort-double", "Use the same size for double as for float" },
1051 { "-fno-short-double", "" },
1052 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1053 { "-fno-short-enums", "" },
1055 { "-Wall", "Enable most warning messages" },
1056 { "-Wbad-function-cast",
1057 "Warn about casting functions to incompatible types" },
1058 { "-Wno-bad-function-cast", "" },
1059 { "-Wmissing-noreturn",
1060 "Warn about functions which might be candidates for attribute noreturn" },
1061 { "-Wno-missing-noreturn", "" },
1062 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1063 { "-Wno-cast-qual", "" },
1064 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1065 { "-Wno-char-subscripts", "" },
1066 { "-Wcomment", "Warn if nested comments are detected" },
1067 { "-Wno-comment", "" },
1068 { "-Wcomments", "Warn if nested comments are detected" },
1069 { "-Wno-comments", "" },
1070 { "-Wconversion", "Warn about possibly confusing type conversions" },
1071 { "-Wno-conversion", "" },
1072 { "-Wformat", "Warn about printf format anomalies" },
1073 { "-Wno-format", "" },
1074 { "-Wimplicit-function-declaration",
1075 "Warn about implicit function declarations" },
1076 { "-Wno-implicit-function-declaration", "" },
1077 { "-Werror-implicit-function-declaration", "" },
1078 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1079 { "-Wno-implicit-int", "" },
1080 { "-Wimplicit", "" },
1081 { "-Wno-implicit", "" },
1082 { "-Wimport", "Warn about the use of the #import directive" },
1083 { "-Wno-import", "" },
1084 { "-Wlong-long","" },
1085 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1086 { "-Wmain", "Warn about suspicious declarations of main" },
1087 { "-Wno-main", "" },
1088 { "-Wmissing-braces",
1089 "Warn about possibly missing braces around initialisers" },
1090 { "-Wno-missing-braces", "" },
1091 { "-Wmissing-declarations",
1092 "Warn about global funcs without previous declarations"},
1093 { "-Wno-missing-declarations", "" },
1094 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1095 { "-Wno-missing-prototypes", "" },
1096 { "-Wmultichar", "Warn about use of multicharacter literals"},
1097 { "-Wno-multichar", "" },
1098 { "-Wnested-externs", "Warn about externs not at file scope level" },
1099 { "-Wno-nested-externs", "" },
1100 { "-Wparentheses", "Warn about possible missing parentheses" },
1101 { "-Wno-parentheses", "" },
1102 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1103 { "-Wno-pointer-arith", "" },
1104 { "-Wredundant-decls",
1105 "Warn about multiple declarations of the same object" },
1106 { "-Wno-redundant-decls", "" },
1107 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1108 { "-Wno-sign-compare", "" },
1109 { "-Wunknown-pragmas", "Warn about unrecognised pragmas" },
1110 { "-Wno-unknown-pragmas", "" },
1111 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1112 { "-Wno-strict-prototypes", "" },
1113 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1114 { "-Wno-traditional", "" },
1115 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1116 { "-Wno-trigraphs", "" },
1118 { "-Wno-undef", "" },
1119 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1120 { "-Wno-write-strings", "" },
1122 /* These are for languages with USE_CPPLIB. */
1123 /* These options are already documented in cpplib.c */
1129 { "-MD", "Print dependencies to FILE.d" },
1130 { "-MMD", "Print dependencies to FILE.d" },
1131 { "-M", "Print dependencies to stdout" },
1132 { "-MM", "Print dependencies to stdout" },
1133 #endif /* USE_CPPLIB */
1136 { "-idirafter", "" },
1141 { "-iwithprefix", "" },
1142 { "-iwithprefixbefore", "" },
1144 { "-lang-c89", "" },
1145 { "-lang-c++", "" },
1147 { "-nostdinc", "" },
1148 { "-nostdinc++", "" },
1149 { "-trigraphs", "" },
1152 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1154 /* These are for obj c. */
1155 DEFINE_LANG_NAME ("Objective C")
1157 { "-lang-objc", "" },
1158 { "-gen-decls", "Dump decls to a .decl file" },
1159 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1160 { "-fno-gnu-runtime", "" },
1161 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1162 { "-fno-next-runtime", "" },
1163 { "-Wselector", "Warn if a selector has multiple methods" },
1164 { "-Wno-selector", "" },
1165 { "-Wprotocol", "" },
1166 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1167 { "-print-objc-runtime-info",
1168 "Generate C header of platform specific features" },
1170 #include "options.h"
1174 /* Here is a table, controlled by the tm.h file, listing each -m switch
1175 and which bits in `target_switches' it should set or clear.
1176 If VALUE is positive, it is bits to set.
1177 If VALUE is negative, -VALUE is bits to clear.
1178 (The sign bit is not used so there is no confusion.) */
1184 const char * description
;
1186 target_switches
[] = TARGET_SWITCHES
;
1188 /* This table is similar, but allows the switch to have a value. */
1190 #ifdef TARGET_OPTIONS
1193 const char * prefix
;
1194 const char ** variable
;
1195 const char * description
;
1197 target_options
[] = TARGET_OPTIONS
;
1200 /* Options controlling warnings */
1202 /* Don't print warning messages. -w. */
1204 int inhibit_warnings
= 0;
1206 /* Print various extra warnings. -W. */
1208 int extra_warnings
= 0;
1210 /* Treat warnings as errors. -Werror. */
1212 int warnings_are_errors
= 0;
1214 /* Nonzero to warn about unused local variables. */
1218 /* Nonzero to warn about code which is never reached. */
1220 int warn_notreached
;
1222 /* Nonzero to warn about variables used before they are initialized. */
1224 int warn_uninitialized
;
1226 /* Nonzero means warn about all declarations which shadow others. */
1230 /* Warn if a switch on an enum fails to have a case for every enum value. */
1234 /* Nonzero means warn about function definitions that default the return type
1235 or that use a null return and have a return-type other than void. */
1237 int warn_return_type
;
1239 /* Nonzero means warn about pointer casts that increase the required
1240 alignment of the target type (and might therefore lead to a crash
1241 due to a misaligned access). */
1243 int warn_cast_align
;
1245 /* Nonzero means warn about any identifiers that match in the first N
1246 characters. The value N is in `id_clash_len'. */
1249 unsigned id_clash_len
;
1251 /* Nonzero means warn about any objects definitions whose size is larger
1252 than N bytes. Also want about function definitions whose returned
1253 values are larger than N bytes. The value N is in `larger_than_size'. */
1255 int warn_larger_than
;
1256 unsigned larger_than_size
;
1258 /* Nonzero means warn if inline function is too large. */
1262 /* Warn if a function returns an aggregate,
1263 since there are often incompatible calling conventions for doing this. */
1265 int warn_aggregate_return
;
1267 /* Likewise for -W. */
1269 lang_independent_options W_options
[] =
1271 {"unused", &warn_unused
, 1, "Warn when a variable is unused" },
1272 {"error", &warnings_are_errors
, 1, ""},
1273 {"shadow", &warn_shadow
, 1, "Warn when one local variable shadows another" },
1274 {"switch", &warn_switch
, 1,
1275 "Warn about enumerated switches missing a specific case" },
1276 {"aggregate-return", &warn_aggregate_return
, 1,
1277 "Warn about returning structures, unions or arrays" },
1278 {"cast-align", &warn_cast_align
, 1,
1279 "Warn about pointer casts which increase alignment" },
1280 {"unreachable-code", &warn_notreached
, 1,
1281 "Warn about code that will never be executed" },
1282 {"uninitialized", &warn_uninitialized
, 1,
1283 "Warn about unitialized automatic variables"},
1284 {"inline", &warn_inline
, 1,
1285 "Warn when an inlined function cannot be inlined"}
1288 /* Output files for assembler code (real compiler output)
1289 and debugging dumps. */
1292 FILE *aux_info_file
;
1293 FILE *rtl_dump_file
= NULL
;
1295 /* Decode the string P as an integral parameter.
1296 If the string is indeed an integer return its numeric value else
1297 issue an Invalid Option error for the option PNAME and return DEFVAL.
1298 If PNAME is zero just return DEFVAL, do not call error. */
1301 read_integral_parameter (p
, pname
, defval
)
1306 const char *endp
= p
;
1310 if (*endp
>= '0' && *endp
<= '9')
1319 error ("Invalid option `%s'", pname
);
1327 /* Time accumulators, to count the total time spent in various passes. */
1331 int integration_time
;
1337 int branch_prob_time
;
1342 int local_alloc_time
;
1343 int global_alloc_time
;
1349 int shorten_branch_time
;
1357 /* Return time used so far, in microseconds. */
1367 #else /* not BeOS */
1368 #if defined (_WIN32) && !defined (__CYGWIN__)
1372 return (clock() * 1000);
1373 #else /* not _WIN32 */
1379 tick
= 1000000 / sysconf(_SC_CLK_TCK
);
1381 return (tms
.tms_utime
+ tms
.tms_stime
) * tick
;
1387 # if HAVE_SYSCONF && defined _SC_CLK_TCK
1388 # define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
1391 # define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
1393 # define TICKS_PER_SECOND HZ /* traditional UNIX */
1397 return (tms
.tms_utime
+ tms
.tms_stime
) * (1000000 / TICKS_PER_SECOND
);
1402 struct rusage rusage
;
1403 getrusage (0, &rusage
);
1404 return (rusage
.ru_utime
.tv_sec
* 1000000 + rusage
.ru_utime
.tv_usec
1405 + rusage
.ru_stime
.tv_sec
* 1000000 + rusage
.ru_stime
.tv_usec
);
1412 int proc_system_time
;
1413 int child_user_time
;
1414 int child_system_time
;
1416 times ((void *) &vms_times
);
1417 return (vms_times
.proc_user_time
+ vms_times
.proc_system_time
) * 10000;
1421 #endif /* _SC_CLK_TCK */
1423 #endif /* __BEOS__ */
1426 #define TIMEVAR(VAR, BODY) \
1427 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
1430 print_time (str
, total
)
1435 "time in %s: %d.%06d (%.0f%%)\n",
1436 str
, total
/ 1000000, total
% 1000000,
1437 (double)total
/ (double)all_time
* 100.0);
1440 /* Count an error or warning. Return 1 if the message should be printed. */
1443 count_error (warningp
)
1446 if (warningp
&& inhibit_warnings
)
1449 if (warningp
&& !warnings_are_errors
)
1453 static int warning_message
= 0;
1455 if (warningp
&& !warning_message
)
1457 notice ("%s: warnings being treated as errors\n", progname
);
1458 warning_message
= 1;
1466 /* Print a fatal error message. NAME is the text.
1467 Also include a system error message based on `errno'. */
1470 pfatal_with_name (name
)
1473 fprintf (stderr
, "%s: ", progname
);
1475 exit (FATAL_EXIT_CODE
);
1479 fatal_io_error (name
)
1482 notice ("%s: %s: I/O error\n", progname
, name
);
1483 exit (FATAL_EXIT_CODE
);
1486 /* This is the default decl_printable_name function. */
1489 decl_name (decl
, verbosity
)
1491 int verbosity ATTRIBUTE_UNUSED
;
1493 return IDENTIFIER_POINTER (DECL_NAME (decl
));
1496 static int need_error_newline
;
1498 /* Function of last error message;
1499 more generally, function such that if next error message is in it
1500 then we don't have to mention the function name. */
1501 static tree last_error_function
= NULL
;
1503 /* Used to detect when input_file_stack has changed since last described. */
1504 static int last_error_tick
;
1506 /* Called when the start of a function definition is parsed,
1507 this function prints on stderr the name of the function. */
1510 announce_function (decl
)
1515 if (rtl_dump_and_exit
)
1516 fprintf (stderr
, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
1518 fprintf (stderr
, " %s", (*decl_printable_name
) (decl
, 2));
1520 need_error_newline
= 1;
1521 last_error_function
= current_function_decl
;
1525 /* The default function to print out name of current function that caused
1529 default_print_error_function (file
)
1532 if (last_error_function
!= current_function_decl
)
1535 fprintf (stderr
, "%s: ", file
);
1537 if (current_function_decl
== NULL
)
1538 notice ("At top level:\n");
1540 notice ((TREE_CODE (TREE_TYPE (current_function_decl
)) == METHOD_TYPE
1541 ? "In method `%s':\n"
1542 : "In function `%s':\n"),
1543 (*decl_printable_name
) (current_function_decl
, 2));
1545 last_error_function
= current_function_decl
;
1549 /* Called by report_error_function to print out function name.
1550 * Default may be overridden by language front-ends. */
1552 void (*print_error_function
) PROTO((const char *)) =
1553 default_print_error_function
;
1555 /* Prints out, if necessary, the name of the current function
1556 that caused an error. Called from all error and warning functions.
1557 We ignore the FILE parameter, as it cannot be relied upon. */
1560 report_error_function (file
)
1561 const char *file ATTRIBUTE_UNUSED
;
1563 struct file_stack
*p
;
1565 if (need_error_newline
)
1567 fprintf (stderr
, "\n");
1568 need_error_newline
= 0;
1571 if (input_file_stack
&& input_file_stack
->next
!= 0
1572 && input_file_stack_tick
!= last_error_tick
)
1574 for (p
= input_file_stack
->next
; p
; p
= p
->next
)
1575 notice ((p
== input_file_stack
->next
1576 ? "In file included from %s:%d"
1577 : ",\n from %s:%d"),
1579 fprintf (stderr
, ":\n");
1580 last_error_tick
= input_file_stack_tick
;
1583 (*print_error_function
) (input_filename
);
1586 /* Print a message. */
1589 vnotice (file
, msgid
, ap
)
1594 vfprintf (file
, _(msgid
), ap
);
1598 notice
VPROTO((const char *msgid
, ...))
1600 #ifndef ANSI_PROTOTYPES
1605 VA_START (ap
, msgid
);
1607 #ifndef ANSI_PROTOTYPES
1608 msgid
= va_arg (ap
, char *);
1611 vnotice (stderr
, msgid
, ap
);
1616 fnotice
VPROTO((FILE *file
, const char *msgid
, ...))
1618 #ifndef ANSI_PROTOTYPES
1624 VA_START (ap
, msgid
);
1626 #ifndef ANSI_PROTOTYPES
1627 file
= va_arg (ap
, FILE *);
1628 msgid
= va_arg (ap
, const char *);
1631 vnotice (file
, msgid
, ap
);
1635 /* Report FILE and LINE (or program name), and optionally just WARN. */
1638 report_file_and_line (file
, line
, warn
)
1644 fprintf (stderr
, "%s:%d: ", file
, line
);
1646 fprintf (stderr
, "%s: ", progname
);
1649 notice ("warning: ");
1652 /* Print a message. */
1655 vmessage (prefix
, msgid
, ap
)
1661 fprintf (stderr
, "%s: ", prefix
);
1663 vfprintf (stderr
, msgid
, ap
);
1666 /* Print a message relevant to line LINE of file FILE. */
1669 v_message_with_file_and_line (file
, line
, warn
, msgid
, ap
)
1676 report_file_and_line (file
, line
, warn
);
1677 vnotice (stderr
, msgid
, ap
);
1678 fputc ('\n', stderr
);
1681 /* Print a message relevant to the given DECL. */
1684 v_message_with_decl (decl
, warn
, msgid
, ap
)
1692 report_file_and_line (DECL_SOURCE_FILE (decl
),
1693 DECL_SOURCE_LINE (decl
), warn
);
1695 /* Do magic to get around lack of varargs support for insertion
1696 of arguments into existing list. We know that the decl is first;
1697 we ass_u_me that it will be printed with "%s". */
1699 for (p
= _(msgid
); *p
; ++p
)
1703 if (*(p
+ 1) == '%')
1705 else if (*(p
+ 1) != 's')
1712 if (p
> _(msgid
)) /* Print the left-hand substring. */
1714 char fmt
[sizeof "%.255s"];
1715 long width
= p
- _(msgid
);
1717 if (width
> 255L) width
= 255L; /* arbitrary */
1718 sprintf (fmt
, "%%.%lds", width
);
1719 fprintf (stderr
, fmt
, _(msgid
));
1722 if (*p
== '%') /* Print the name. */
1724 const char *n
= (DECL_NAME (decl
)
1725 ? (*decl_printable_name
) (decl
, 2)
1731 if (ISALPHA (*(p
- 1) & 0xFF))
1736 if (*p
) /* Print the rest of the message. */
1737 vmessage ((char *)NULL
, p
, ap
);
1739 fputc ('\n', stderr
);
1742 /* Figure file and line of the given INSN. */
1745 file_and_line_for_asm (insn
, pfile
, pline
)
1750 rtx body
= PATTERN (insn
);
1753 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1754 if (GET_CODE (body
) == SET
&& GET_CODE (SET_SRC (body
)) == ASM_OPERANDS
)
1755 asmop
= SET_SRC (body
);
1756 else if (GET_CODE (body
) == ASM_OPERANDS
)
1758 else if (GET_CODE (body
) == PARALLEL
1759 && GET_CODE (XVECEXP (body
, 0, 0)) == SET
)
1760 asmop
= SET_SRC (XVECEXP (body
, 0, 0));
1761 else if (GET_CODE (body
) == PARALLEL
1762 && GET_CODE (XVECEXP (body
, 0, 0)) == ASM_OPERANDS
)
1763 asmop
= XVECEXP (body
, 0, 0);
1769 *pfile
= ASM_OPERANDS_SOURCE_FILE (asmop
);
1770 *pline
= ASM_OPERANDS_SOURCE_LINE (asmop
);
1774 *pfile
= input_filename
;
1779 /* Report an error at line LINE of file FILE. */
1782 v_error_with_file_and_line (file
, line
, msgid
, ap
)
1789 report_error_function (file
);
1790 v_message_with_file_and_line (file
, line
, 0, msgid
, ap
);
1794 error_with_file_and_line
VPROTO((const char *file
, int line
,
1795 const char *msgid
, ...))
1797 #ifndef ANSI_PROTOTYPES
1804 VA_START (ap
, msgid
);
1806 #ifndef ANSI_PROTOTYPES
1807 file
= va_arg (ap
, const char *);
1808 line
= va_arg (ap
, int);
1809 msgid
= va_arg (ap
, const char *);
1812 v_error_with_file_and_line (file
, line
, msgid
, ap
);
1816 /* Report an error at the declaration DECL.
1817 MSGID is a format string which uses %s to substitute the declaration
1818 name; subsequent substitutions are a la printf. */
1821 v_error_with_decl (decl
, msgid
, ap
)
1827 report_error_function (DECL_SOURCE_FILE (decl
));
1828 v_message_with_decl (decl
, 0, msgid
, ap
);
1832 error_with_decl
VPROTO((tree decl
, const char *msgid
, ...))
1834 #ifndef ANSI_PROTOTYPES
1840 VA_START (ap
, msgid
);
1842 #ifndef ANSI_PROTOTYPES
1843 decl
= va_arg (ap
, tree
);
1844 msgid
= va_arg (ap
, const char *);
1847 v_error_with_decl (decl
, msgid
, ap
);
1851 /* Report an error at the line number of the insn INSN.
1852 This is used only when INSN is an `asm' with operands,
1853 and each ASM_OPERANDS records its own source file and line. */
1856 v_error_for_asm (insn
, msgid
, ap
)
1865 file_and_line_for_asm (insn
, &file
, &line
);
1866 report_error_function (file
);
1867 v_message_with_file_and_line (file
, line
, 0, msgid
, ap
);
1871 error_for_asm
VPROTO((rtx insn
, const char *msgid
, ...))
1873 #ifndef ANSI_PROTOTYPES
1879 VA_START (ap
, msgid
);
1881 #ifndef ANSI_PROTOTYPES
1882 insn
= va_arg (ap
, rtx
);
1883 msgid
= va_arg (ap
, const char *);
1886 v_error_for_asm (insn
, msgid
, ap
);
1890 /* Report an error at the current line number. */
1897 v_error_with_file_and_line (input_filename
, lineno
, msgid
, ap
);
1901 error
VPROTO((const char *msgid
, ...))
1903 #ifndef ANSI_PROTOTYPES
1908 VA_START (ap
, msgid
);
1910 #ifndef ANSI_PROTOTYPES
1911 msgid
= va_arg (ap
, const char *);
1918 /* Report a fatal error at the current line number. */
1926 exit (FATAL_EXIT_CODE
);
1930 fatal
VPROTO((const char *msgid
, ...))
1932 #ifndef ANSI_PROTOTYPES
1937 VA_START (ap
, msgid
);
1939 #ifndef ANSI_PROTOTYPES
1940 msgid
= va_arg (ap
, const char *);
1948 _fatal_insn (msgid
, insn
, file
, line
, function
)
1953 const char *function
;
1957 fancy_abort (file
, line
, function
);
1961 _fatal_insn_not_found (insn
, file
, line
, function
)
1965 const char *function
;
1967 if (INSN_CODE (insn
) < 0)
1968 _fatal_insn ("Unrecognizable insn:", insn
, file
, line
, function
);
1970 _fatal_insn ("Insn does not satisfy its constraints:",
1971 insn
, file
, line
, function
);
1974 /* Report a warning at line LINE of file FILE. */
1977 v_warning_with_file_and_line (file
, line
, msgid
, ap
)
1983 if (count_error (1))
1985 report_error_function (file
);
1986 v_message_with_file_and_line (file
, line
, 1, msgid
, ap
);
1991 warning_with_file_and_line
VPROTO((const char *file
, int line
,
1992 const char *msgid
, ...))
1994 #ifndef ANSI_PROTOTYPES
2001 VA_START (ap
, msgid
);
2003 #ifndef ANSI_PROTOTYPES
2004 file
= va_arg (ap
, const char *);
2005 line
= va_arg (ap
, int);
2006 msgid
= va_arg (ap
, const char *);
2009 v_warning_with_file_and_line (file
, line
, msgid
, ap
);
2013 /* Report a warning at the declaration DECL.
2014 MSGID is a format string which uses %s to substitute the declaration
2015 name; subsequent substitutions are a la printf. */
2018 v_warning_with_decl (decl
, msgid
, ap
)
2023 if (count_error (1))
2025 report_error_function (DECL_SOURCE_FILE (decl
));
2026 v_message_with_decl (decl
, 1, msgid
, ap
);
2031 warning_with_decl
VPROTO((tree decl
, const char *msgid
, ...))
2033 #ifndef ANSI_PROTOTYPES
2039 VA_START (ap
, msgid
);
2041 #ifndef ANSI_PROTOTYPES
2042 decl
= va_arg (ap
, tree
);
2043 msgid
= va_arg (ap
, const char *);
2046 v_warning_with_decl (decl
, msgid
, ap
);
2050 /* Report a warning at the line number of the insn INSN.
2051 This is used only when INSN is an `asm' with operands,
2052 and each ASM_OPERANDS records its own source file and line. */
2055 v_warning_for_asm (insn
, msgid
, ap
)
2060 if (count_error (1))
2065 file_and_line_for_asm (insn
, &file
, &line
);
2066 report_error_function (file
);
2067 v_message_with_file_and_line (file
, line
, 1, msgid
, ap
);
2072 warning_for_asm
VPROTO((rtx insn
, const char *msgid
, ...))
2074 #ifndef ANSI_PROTOTYPES
2080 VA_START (ap
, msgid
);
2082 #ifndef ANSI_PROTOTYPES
2083 insn
= va_arg (ap
, rtx
);
2084 msgid
= va_arg (ap
, const char *);
2087 v_warning_for_asm (insn
, msgid
, ap
);
2091 /* Report a warning at the current line number. */
2094 vwarning (msgid
, ap
)
2098 v_warning_with_file_and_line (input_filename
, lineno
, msgid
, ap
);
2102 warning
VPROTO((const char *msgid
, ...))
2104 #ifndef ANSI_PROTOTYPES
2109 VA_START (ap
, msgid
);
2111 #ifndef ANSI_PROTOTYPES
2112 msgid
= va_arg (ap
, const char *);
2115 vwarning (msgid
, ap
);
2119 /* These functions issue either warnings or errors depending on
2120 -pedantic-errors. */
2123 vpedwarn (msgid
, ap
)
2127 if (flag_pedantic_errors
)
2130 vwarning (msgid
, ap
);
2134 pedwarn
VPROTO((const char *msgid
, ...))
2136 #ifndef ANSI_PROTOTYPES
2141 VA_START (ap
, msgid
);
2143 #ifndef ANSI_PROTOTYPES
2144 msgid
= va_arg (ap
, const char *);
2147 vpedwarn (msgid
, ap
);
2152 v_pedwarn_with_decl (decl
, msgid
, ap
)
2157 /* We don't want -pedantic-errors to cause the compilation to fail from
2158 "errors" in system header files. Sometimes fixincludes can't fix what's
2159 broken (eg: unsigned char bitfields - fixing it may change the alignment
2160 which will cause programs to mysteriously fail because the C library
2161 or kernel uses the original layout). There's no point in issuing a
2162 warning either, it's just unnecessary noise. */
2164 if (! DECL_IN_SYSTEM_HEADER (decl
))
2166 if (flag_pedantic_errors
)
2167 v_error_with_decl (decl
, msgid
, ap
);
2169 v_warning_with_decl (decl
, msgid
, ap
);
2174 pedwarn_with_decl
VPROTO((tree decl
, const char *msgid
, ...))
2176 #ifndef ANSI_PROTOTYPES
2182 VA_START (ap
, msgid
);
2184 #ifndef ANSI_PROTOTYPES
2185 decl
= va_arg (ap
, tree
);
2186 msgid
= va_arg (ap
, const char *);
2189 v_pedwarn_with_decl (decl
, msgid
, ap
);
2194 v_pedwarn_with_file_and_line (file
, line
, msgid
, ap
)
2200 if (flag_pedantic_errors
)
2201 v_error_with_file_and_line (file
, line
, msgid
, ap
);
2203 v_warning_with_file_and_line (file
, line
, msgid
, ap
);
2207 pedwarn_with_file_and_line
VPROTO((const char *file
, int line
,
2208 const char *msgid
, ...))
2210 #ifndef ANSI_PROTOTYPES
2217 VA_START (ap
, msgid
);
2219 #ifndef ANSI_PROTOTYPES
2220 file
= va_arg (ap
, const char *);
2221 line
= va_arg (ap
, int);
2222 msgid
= va_arg (ap
, const char *);
2225 v_pedwarn_with_file_and_line (file
, line
, msgid
, ap
);
2229 /* Apologize for not implementing some feature. */
2238 fprintf (stderr
, "%s:%d: ", input_filename
, lineno
);
2240 fprintf (stderr
, "%s: ", progname
);
2241 notice ("sorry, not implemented: ");
2242 vnotice (stderr
, msgid
, ap
);
2243 fputc ('\n', stderr
);
2247 sorry
VPROTO((const char *msgid
, ...))
2249 #ifndef ANSI_PROTOTYPES
2254 VA_START (ap
, msgid
);
2256 #ifndef ANSI_PROTOTYPES
2257 msgid
= va_arg (ap
, const char *);
2265 /* This calls abort and is used to avoid problems when abort if a macro.
2266 It is used when we need to pass the address of abort. */
2274 /* When `malloc.c' is compiled with `rcheck' defined,
2275 it calls this function to report clobberage. */
2279 const char * s ATTRIBUTE_UNUSED
;
2284 /* Return the logarithm of X, base 2, considering X unsigned,
2285 if X is a power of 2. Otherwise, returns -1.
2287 This should be used via the `exact_log2' macro. */
2291 register unsigned HOST_WIDE_INT x
;
2293 register int log
= 0;
2294 /* Test for 0 or a power of 2. */
2295 if (x
== 0 || x
!= (x
& -x
))
2297 while ((x
>>= 1) != 0)
2302 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
2303 If X is 0, return -1.
2305 This should be used via the floor_log2 macro. */
2309 register unsigned HOST_WIDE_INT x
;
2311 register int log
= -1;
2318 static int float_handler_set
;
2320 jmp_buf float_handler
;
2322 /* Signals actually come here. */
2325 float_signal (signo
)
2326 /* If this is missing, some compilers complain. */
2327 int signo ATTRIBUTE_UNUSED
;
2329 if (float_handled
== 0)
2331 #if defined (USG) || defined (hpux)
2332 signal (SIGFPE
, float_signal
); /* re-enable the signal catcher */
2335 signal (SIGFPE
, float_signal
);
2336 longjmp (float_handler
, 1);
2339 /* Specify where to longjmp to when a floating arithmetic error happens.
2340 If HANDLER is 0, it means don't handle the errors any more. */
2343 set_float_handler (handler
)
2346 float_handled
= (handler
!= 0);
2348 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
2350 if (float_handled
&& ! float_handler_set
)
2352 signal (SIGFPE
, float_signal
);
2353 float_handler_set
= 1;
2357 /* This is a wrapper function for code which might elicit an
2358 arithmetic exception. That code should be passed in as a function
2359 pointer FN, and one argument DATA. DATA is usually a struct which
2360 contains the real input and output for function FN. This function
2361 returns 0 (failure) if longjmp was called (i.e. an exception
2362 occured.) It returns 1 (success) otherwise. */
2365 do_float_handler (fn
, data
)
2366 void (*fn
) PROTO ((PTR
));
2373 /* We got here via longjmp() caused by an exception in function fn() */
2374 set_float_handler (NULL
);
2378 set_float_handler (buf
);
2380 set_float_handler (NULL
);
2384 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
2385 error happens, pushing the previous specification into OLD_HANDLER.
2386 Return an indication of whether there was a previous handler in effect. */
2389 push_float_handler (handler
, old_handler
)
2390 jmp_buf handler
, old_handler
;
2392 int was_handled
= float_handled
;
2396 memcpy ((char *) old_handler
, (char *) float_handler
,
2397 sizeof (float_handler
));
2399 memcpy ((char *) float_handler
, (char *) handler
, sizeof (float_handler
));
2403 /* Restore the previous specification of whether and where to longjmp to
2404 when a floating arithmetic error happens. */
2407 pop_float_handler (handled
, handler
)
2411 float_handled
= handled
;
2413 bcopy ((char *) handler
, (char *) float_handler
, sizeof (float_handler
));
2416 /* Handler for SIGPIPE. */
2420 /* If this is missing, some compilers complain. */
2421 int signo ATTRIBUTE_UNUSED
;
2423 fatal ("output pipe has been closed");
2426 /* Strip off a legitimate source ending from the input string NAME of
2427 length LEN. Rather than having to know the names used by all of
2428 our front ends, we strip off an ending of a period followed by
2429 up to five characters. (Java uses ".class".) */
2432 strip_off_ending (name
, len
)
2437 for (i
= 2; i
< 6 && len
> i
; i
++)
2439 if (name
[len
- i
] == '.')
2441 name
[len
- i
] = '\0';
2447 /* Output a quoted string. */
2450 output_quoted_string (asm_file
, string
)
2454 #ifdef OUTPUT_QUOTED_STRING
2455 OUTPUT_QUOTED_STRING (asm_file
, string
);
2459 putc ('\"', asm_file
);
2460 while ((c
= *string
++) != 0)
2462 if (c
== '\"' || c
== '\\')
2463 putc ('\\', asm_file
);
2466 putc ('\"', asm_file
);
2470 /* Output a file name in the form wanted by System V. */
2473 output_file_directive (asm_file
, input_name
)
2475 const char *input_name
;
2477 int len
= strlen (input_name
);
2478 const char *na
= input_name
+ len
;
2480 /* NA gets INPUT_NAME sans directory names. */
2481 while (na
> input_name
)
2485 #ifdef DIR_SEPARATOR
2486 if (na
[-1] == DIR_SEPARATOR
)
2492 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
2493 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file
, na
);
2495 #ifdef ASM_OUTPUT_SOURCE_FILENAME
2496 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
2498 fprintf (asm_file
, "\t.file\t");
2499 output_quoted_string (asm_file
, na
);
2500 fputc ('\n', asm_file
);
2505 #ifdef ASM_IDENTIFY_LANGUAGE
2506 /* Routine to build language identifier for object file. */
2508 output_lang_identify (asm_out_file
)
2511 int len
= strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
2512 char *s
= (char *) alloca (len
);
2513 sprintf (s
, "__gnu_compiled_%s", lang_identify ());
2514 ASM_OUTPUT_LABEL (asm_out_file
, s
);
2518 /* Routine to open a dump file. */
2520 open_dump_file (suffix
, function_name
)
2522 const char *function_name
;
2529 dumpname
= concat (dump_base_name
, suffix
, NULL
);
2531 if (rtl_dump_file
!= NULL
)
2532 fclose (rtl_dump_file
);
2534 rtl_dump_file
= fopen (dumpname
, "a");
2536 if (rtl_dump_file
== NULL
)
2537 pfatal_with_name (dumpname
);
2542 fprintf (rtl_dump_file
, "\n;; Function %s\n\n", function_name
);
2548 /* Routine to close a dump file. */
2550 close_dump_file (func
, insns
)
2551 void (*func
) PROTO ((FILE *, rtx
));
2558 func (rtl_dump_file
, insns
);
2560 fflush (rtl_dump_file
);
2561 fclose (rtl_dump_file
);
2563 rtl_dump_file
= NULL
;
2569 /* Routine to dump rtl into a file. */
2571 dump_rtl (suffix
, decl
, func
, insns
)
2574 void (*func
) PROTO ((FILE *, rtx
));
2577 open_dump_file (suffix
, decl_printable_name (decl
, 2));
2578 close_dump_file (func
, insns
);
2581 /* Routine to empty a dump file. */
2583 clean_dump_file (suffix
)
2586 char * const dumpname
= concat (dump_base_name
, suffix
, NULL
);
2588 rtl_dump_file
= fopen (dumpname
, "w");
2590 if (rtl_dump_file
== NULL
)
2591 pfatal_with_name (dumpname
);
2595 fclose (rtl_dump_file
);
2596 rtl_dump_file
= NULL
;
2601 /* Do any final processing required for the declarations in VEC, of
2602 which there are LEN. We write out inline functions and variables
2603 that have been deferred until this point, but which are required.
2604 Returns non-zero if anything was put out. */
2606 wrapup_global_declarations (vec
, len
)
2613 int output_something
= 0;
2615 for (i
= 0; i
< len
; i
++)
2619 /* We're not deferring this any longer. */
2620 DECL_DEFER_OUTPUT (decl
) = 0;
2622 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0
2623 && incomplete_decl_finalize_hook
!= 0)
2624 (*incomplete_decl_finalize_hook
) (decl
);
2627 /* Now emit any global variables or functions that we have been
2628 putting off. We need to loop in case one of the things emitted
2629 here references another one which comes earlier in the list. */
2633 for (i
= 0; i
< len
; i
++)
2637 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
2640 /* Don't write out static consts, unless we still need them.
2642 We also keep static consts if not optimizing (for debugging),
2643 unless the user specified -fno-keep-static-consts.
2644 ??? They might be better written into the debug information.
2645 This is possible when using DWARF.
2647 A language processor that wants static constants to be always
2648 written out (even if it is not used) is responsible for
2649 calling rest_of_decl_compilation itself. E.g. the C front-end
2650 calls rest_of_decl_compilation from finish_decl.
2651 One motivation for this is that is conventional in some
2652 environments to write things like:
2653 static const char rcsid[] = "... version string ...";
2654 intending to force the string to be in the executable.
2656 A language processor that would prefer to have unneeded
2657 static constants "optimized away" would just defer writing
2658 them out until here. E.g. C++ does this, because static
2659 constants are often defined in header files.
2661 ??? A tempting alternative (for both C and C++) would be
2662 to force a constant to be written if and only if it is
2663 defined in a main file, as opposed to an include file. */
2665 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
2666 && (! TREE_READONLY (decl
)
2667 || TREE_PUBLIC (decl
)
2668 || (!optimize
&& flag_keep_static_consts
)
2669 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
2672 rest_of_decl_compilation (decl
, NULL_PTR
, 1, 1);
2675 if (TREE_CODE (decl
) == FUNCTION_DECL
2676 && DECL_INITIAL (decl
) != 0
2677 && DECL_SAVED_INSNS (decl
) != 0
2678 && (flag_keep_inline_functions
2679 || (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
2680 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
2683 temporary_allocation ();
2684 output_inline_function (decl
);
2685 permanent_allocation (1);
2690 output_something
= 1;
2694 return output_something
;
2697 /* Issue appropriate warnings for the global declarations in VEC (of
2698 which there are LEN). Output debugging information for them. */
2700 check_global_declarations (vec
, len
)
2707 for (i
= 0; i
< len
; i
++)
2711 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
2712 && ! TREE_ASM_WRITTEN (decl
))
2713 /* Cancel the RTL for this decl so that, if debugging info
2714 output for global variables is still to come,
2715 this one will be omitted. */
2716 DECL_RTL (decl
) = NULL
;
2718 /* Warn about any function
2719 declared static but not defined.
2720 We don't warn about variables,
2721 because many programs have static variables
2722 that exist only to get some text into the object file. */
2723 if (TREE_CODE (decl
) == FUNCTION_DECL
2725 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
2726 && DECL_INITIAL (decl
) == 0
2727 && DECL_EXTERNAL (decl
)
2728 && ! DECL_ARTIFICIAL (decl
)
2729 && ! TREE_PUBLIC (decl
))
2731 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
2732 pedwarn_with_decl (decl
,
2733 "`%s' used but never defined");
2735 warning_with_decl (decl
,
2736 "`%s' declared `static' but never defined");
2737 /* This symbol is effectively an "extern" declaration now. */
2738 TREE_PUBLIC (decl
) = 1;
2739 assemble_external (decl
);
2742 /* Warn about static fns or vars defined but not used,
2743 but not about inline functions or static consts
2744 since defining those in header files is normal practice. */
2746 && ((TREE_CODE (decl
) == FUNCTION_DECL
&& ! DECL_INLINE (decl
))
2747 || (TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
2748 && ! DECL_IN_SYSTEM_HEADER (decl
)
2749 && ! DECL_EXTERNAL (decl
)
2750 && ! TREE_PUBLIC (decl
)
2751 && ! TREE_USED (decl
)
2752 && (TREE_CODE (decl
) == FUNCTION_DECL
|| ! DECL_REGISTER (decl
))
2753 /* The TREE_USED bit for file-scope decls
2754 is kept in the identifier, to handle multiple
2755 external decls in different scopes. */
2756 && ! TREE_USED (DECL_NAME (decl
)))
2757 warning_with_decl (decl
, "`%s' defined but not used");
2759 #ifdef SDB_DEBUGGING_INFO
2760 /* The COFF linker can move initialized global vars to the end.
2761 And that can screw up the symbol ordering.
2762 By putting the symbols in that order to begin with,
2763 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2764 if (write_symbols
== SDB_DEBUG
&& TREE_CODE (decl
) == VAR_DECL
2765 && TREE_PUBLIC (decl
) && DECL_INITIAL (decl
)
2766 && ! DECL_EXTERNAL (decl
)
2767 && DECL_RTL (decl
) != 0)
2768 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
2770 /* Output COFF information for non-global
2771 file-scope initialized variables. */
2772 if (write_symbols
== SDB_DEBUG
2773 && TREE_CODE (decl
) == VAR_DECL
2774 && DECL_INITIAL (decl
)
2775 && ! DECL_EXTERNAL (decl
)
2776 && DECL_RTL (decl
) != 0
2777 && GET_CODE (DECL_RTL (decl
)) == MEM
)
2778 TIMEVAR (symout_time
, sdbout_toplevel_data (decl
));
2779 #endif /* SDB_DEBUGGING_INFO */
2780 #ifdef DWARF_DEBUGGING_INFO
2781 /* Output DWARF information for file-scope tentative data object
2782 declarations, file-scope (extern) function declarations (which
2783 had no corresponding body) and file-scope tagged type declarations
2784 and definitions which have not yet been forced out. */
2786 if (write_symbols
== DWARF_DEBUG
2787 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2788 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 1));
2790 #ifdef DWARF2_DEBUGGING_INFO
2791 /* Output DWARF2 information for file-scope tentative data object
2792 declarations, file-scope (extern) function declarations (which
2793 had no corresponding body) and file-scope tagged type declarations
2794 and definitions which have not yet been forced out. */
2796 if (write_symbols
== DWARF2_DEBUG
2797 && (TREE_CODE (decl
) != FUNCTION_DECL
|| !DECL_INITIAL (decl
)))
2798 TIMEVAR (symout_time
, dwarf2out_decl (decl
));
2803 /* Compile an entire file of output from cpp, named NAME.
2804 Write a file of assembly output and various debugging dumps. */
2813 int name_specified
= name
!= 0;
2815 if (dump_base_name
== 0)
2816 dump_base_name
= name
? name
: "gccdump";
2820 integration_time
= 0;
2826 branch_prob_time
= 0;
2831 local_alloc_time
= 0;
2832 global_alloc_time
= 0;
2838 shorten_branch_time
= 0;
2844 /* Initialize data in various passes. */
2848 name
= init_parse (name
);
2849 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2850 || debug_info_level
== DINFO_LEVEL_VERBOSE
2851 || flag_test_coverage
2852 || warn_notreached
);
2854 init_decl_processing ();
2860 init_function_once ();
2861 init_stor_layout_once ();
2863 /* The following initialization functions need to generate rtl, so
2864 provide a dummy function context for them. */
2865 init_dummy_function_start ();
2868 if (flag_caller_saves
)
2869 init_caller_save ();
2870 expand_dummy_function_end ();
2872 /* If auxiliary info generation is desired, open the output file.
2873 This goes in the same directory as the source file--unlike
2874 all the other output files. */
2875 if (flag_gen_aux_info
)
2877 aux_info_file
= fopen (aux_info_file_name
, "w");
2878 if (aux_info_file
== 0)
2879 pfatal_with_name (aux_info_file_name
);
2882 /* Clear the dump files. */
2884 clean_dump_file (".rtl");
2887 clean_dump_file (".jump");
2888 if (graph_dump_format
!= no_graph
)
2889 clean_graph_dump_file (dump_base_name
, ".jump");
2893 clean_dump_file (".addressof");
2894 if (graph_dump_format
!= no_graph
)
2895 clean_graph_dump_file (dump_base_name
, ".addressof");
2899 clean_dump_file (".cse");
2900 if (graph_dump_format
!= no_graph
)
2901 clean_graph_dump_file (dump_base_name
, ".cse");
2905 clean_dump_file (".loop");
2906 if (graph_dump_format
!= no_graph
)
2907 clean_graph_dump_file (dump_base_name
, ".loop");
2911 clean_dump_file (".cse2");
2912 if (graph_dump_format
!= no_graph
)
2913 clean_graph_dump_file (dump_base_name
, ".cse2");
2915 if (branch_prob_dump
)
2917 clean_dump_file (".bp");
2918 if (graph_dump_format
!= no_graph
)
2919 clean_graph_dump_file (dump_base_name
, ".bp");
2923 clean_dump_file (".flow");
2924 if (graph_dump_format
!= no_graph
)
2925 clean_graph_dump_file (dump_base_name
, ".flow");
2929 clean_dump_file (".combine");
2930 if (graph_dump_format
!= no_graph
)
2931 clean_graph_dump_file (dump_base_name
, ".combine");
2935 clean_dump_file (".regmove");
2936 if (graph_dump_format
!= no_graph
)
2937 clean_graph_dump_file (dump_base_name
, ".regmove");
2941 clean_dump_file (".sched");
2942 if (graph_dump_format
!= no_graph
)
2943 clean_graph_dump_file (dump_base_name
, ".sched");
2947 clean_dump_file (".lreg");
2948 if (graph_dump_format
!= no_graph
)
2949 clean_graph_dump_file (dump_base_name
, ".lreg");
2951 if (global_reg_dump
)
2953 clean_dump_file (".greg");
2954 if (graph_dump_format
!= no_graph
)
2955 clean_graph_dump_file (dump_base_name
, ".greg");
2959 clean_dump_file (".flow2");
2960 if (graph_dump_format
!= no_graph
)
2961 clean_graph_dump_file (dump_base_name
, ".flow2");
2965 clean_dump_file (".peephole2");
2966 if (graph_dump_format
!= no_graph
)
2967 clean_graph_dump_file (dump_base_name
, ".peephole2");
2971 clean_dump_file (".sched2");
2972 if (graph_dump_format
!= no_graph
)
2973 clean_graph_dump_file (dump_base_name
, ".sched2");
2977 clean_dump_file (".jump2");
2978 if (graph_dump_format
!= no_graph
)
2979 clean_graph_dump_file (dump_base_name
, ".jump2");
2984 clean_dump_file (".dbr");
2985 if (graph_dump_format
!= no_graph
)
2986 clean_graph_dump_file (dump_base_name
, ".dbr");
2991 clean_dump_file (".gcse");
2992 if (graph_dump_format
!= no_graph
)
2993 clean_graph_dump_file (dump_base_name
, ".gcse");
2998 clean_dump_file (".stack");
2999 if (graph_dump_format
!= no_graph
)
3000 clean_graph_dump_file (dump_base_name
, ".stack");
3003 #ifdef MACHINE_DEPENDENT_REORG
3004 if (mach_dep_reorg_dump
)
3006 clean_dump_file (".mach");
3007 if (graph_dump_format
!= no_graph
)
3008 clean_graph_dump_file (dump_base_name
, ".mach");
3012 /* Open assembler code output file. */
3014 if (flag_syntax_only
)
3015 asm_out_file
= NULL
;
3018 if (! name_specified
&& asm_file_name
== 0)
3019 asm_out_file
= stdout
;
3022 int len
= strlen (dump_base_name
);
3023 register char *dumpname
= (char *) xmalloc (len
+ 6);
3024 strcpy (dumpname
, dump_base_name
);
3025 strip_off_ending (dumpname
, len
);
3026 strcat (dumpname
, ".s");
3027 if (asm_file_name
== 0)
3028 asm_file_name
= xstrdup (dumpname
);
3029 if (!strcmp (asm_file_name
, "-"))
3030 asm_out_file
= stdout
;
3032 asm_out_file
= fopen (asm_file_name
, "w");
3033 if (asm_out_file
== 0)
3034 pfatal_with_name (asm_file_name
);
3037 #ifdef IO_BUFFER_SIZE
3038 setvbuf (asm_out_file
, (char *) xmalloc (IO_BUFFER_SIZE
),
3039 _IOFBF
, IO_BUFFER_SIZE
);
3043 input_filename
= name
;
3045 /* Put an entry on the input file stack for the main input file. */
3047 = (struct file_stack
*) xmalloc (sizeof (struct file_stack
));
3048 input_file_stack
->next
= 0;
3049 input_file_stack
->name
= input_filename
;
3051 /* Perform language-specific initialization.
3052 This may set main_input_filename. */
3055 /* If the input doesn't start with a #line, use the input name
3056 as the official input file name. */
3057 if (main_input_filename
== 0)
3058 main_input_filename
= name
;
3060 if (flag_syntax_only
)
3062 write_symbols
= NO_DEBUG
;
3064 profile_block_flag
= 0;
3068 ASM_FILE_START (asm_out_file
);
3070 #ifdef ASM_COMMENT_START
3071 if (flag_verbose_asm
)
3073 /* Print the list of options in effect. */
3074 print_version (asm_out_file
, ASM_COMMENT_START
);
3075 print_switch_values (asm_out_file
, 0, MAX_LINE
,
3076 ASM_COMMENT_START
, " ", "\n");
3077 /* Add a blank line here so it appears in assembler output but not
3079 fprintf (asm_out_file
, "\n");
3083 /* Output something to inform GDB that this compilation was by GCC. */
3084 #ifndef ASM_IDENTIFY_GCC
3085 fprintf (asm_out_file
, "gcc2_compiled.:\n");
3087 ASM_IDENTIFY_GCC (asm_out_file
);
3090 /* Output something to identify which front-end produced this file. */
3091 #ifdef ASM_IDENTIFY_LANGUAGE
3092 ASM_IDENTIFY_LANGUAGE (asm_out_file
);
3094 } /* ! flag_syntax_only */
3096 #ifndef ASM_OUTPUT_SECTION_NAME
3097 if (flag_function_sections
)
3099 warning ("-ffunction-sections not supported for this target.");
3100 flag_function_sections
= 0;
3102 if (flag_data_sections
)
3104 warning ("-fdata-sections not supported for this target.");
3105 flag_data_sections
= 0;
3109 if (flag_function_sections
3110 && (profile_flag
|| profile_block_flag
))
3112 warning ("-ffunction-sections disabled; it makes profiling impossible.");
3113 flag_function_sections
= 0;
3116 #ifndef OBJECT_FORMAT_ELF
3117 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
3118 warning ("-ffunction-sections may affect debugging on some targets.");
3121 /* ??? Note: There used to be a conditional here
3122 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
3123 This was to guarantee separation between gcc_compiled. and
3124 the first function, for the sake of dbx on Suns.
3125 However, having the extra zero here confused the Emacs
3126 code for unexec, and might confuse other programs too.
3127 Therefore, I took out that change.
3128 In future versions we should find another way to solve
3129 that dbx problem. -- rms, 23 May 93. */
3131 /* Don't let the first function fall at the same address
3132 as gcc_compiled., if profiling. */
3133 if (profile_flag
|| profile_block_flag
)
3135 /* It's best if we can write a nop here since some
3136 assemblers don't tolerate zeros in the text section. */
3137 if (insn_template
[CODE_FOR_nop
] != 0)
3138 output_asm_insn (insn_template
[CODE_FOR_nop
], NULL_PTR
);
3140 assemble_zeros (UNITS_PER_WORD
);
3143 /* If dbx symbol table desired, initialize writing it
3144 and output the predefined types. */
3145 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3146 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
3147 TIMEVAR (symout_time
, dbxout_init (asm_out_file
, main_input_filename
,
3150 #ifdef SDB_DEBUGGING_INFO
3151 if (write_symbols
== SDB_DEBUG
)
3152 TIMEVAR (symout_time
, sdbout_init (asm_out_file
, main_input_filename
,
3155 #ifdef DWARF_DEBUGGING_INFO
3156 if (write_symbols
== DWARF_DEBUG
)
3157 TIMEVAR (symout_time
, dwarfout_init (asm_out_file
, main_input_filename
));
3159 #ifdef DWARF2_UNWIND_INFO
3160 if (dwarf2out_do_frame ())
3161 dwarf2out_frame_init ();
3163 #ifdef DWARF2_DEBUGGING_INFO
3164 if (write_symbols
== DWARF2_DEBUG
)
3165 TIMEVAR (symout_time
, dwarf2out_init (asm_out_file
, main_input_filename
));
3168 /* Initialize yet another pass. */
3170 init_final (main_input_filename
);
3171 init_branch_prob (dump_base_name
);
3173 start_time
= get_run_time ();
3175 /* Call the parser, which parses the entire file
3176 (calling rest_of_compilation for each function). */
3178 if (yyparse () != 0)
3180 if (errorcount
== 0)
3181 notice ("Errors detected in input file (your bison.simple is out of date)\n");
3183 /* In case there were missing closebraces,
3184 get us back to the global binding level. */
3185 while (! global_bindings_p ())
3189 /* Compilation is now finished except for writing
3190 what's left of the symbol table output. */
3192 parse_time
+= get_run_time () - start_time
;
3194 parse_time
-= integration_time
;
3195 parse_time
-= varconst_time
;
3197 if (flag_syntax_only
)
3200 globals
= getdecls ();
3202 /* Really define vars that have had only a tentative definition.
3203 Really output inline functions that must actually be callable
3204 and have not been output so far. */
3207 int len
= list_length (globals
);
3208 tree
*vec
= (tree
*) alloca (sizeof (tree
) * len
);
3212 /* Process the decls in reverse order--earliest first.
3213 Put them into VEC from back to front, then take out from front. */
3215 for (i
= 0, decl
= globals
; i
< len
; i
++, decl
= TREE_CHAIN (decl
))
3216 vec
[len
- i
- 1] = decl
;
3218 wrapup_global_declarations (vec
, len
);
3220 /* This must occur after the loop to output deferred functions. Else
3221 the profiler initializer would not be emitted if all the functions
3222 in this compilation unit were deferred.
3224 output_func_start_profiler can not cause any additional functions or
3225 data to need to be output, so it need not be in the deferred function
3227 output_func_start_profiler ();
3229 /* Now that all possible functions have been output, we can dump
3230 the exception table. */
3232 output_exception_table ();
3234 check_global_declarations (vec
, len
);
3237 /* Write out any pending weak symbol declarations. */
3241 /* Do dbx symbols */
3242 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3243 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
3244 TIMEVAR (symout_time
,
3246 dbxout_finish (asm_out_file
, main_input_filename
);
3250 #ifdef DWARF_DEBUGGING_INFO
3251 if (write_symbols
== DWARF_DEBUG
)
3252 TIMEVAR (symout_time
,
3258 #ifdef DWARF2_UNWIND_INFO
3259 if (dwarf2out_do_frame ())
3260 dwarf2out_frame_finish ();
3263 #ifdef DWARF2_DEBUGGING_INFO
3264 if (write_symbols
== DWARF2_DEBUG
)
3265 TIMEVAR (symout_time
,
3267 dwarf2out_finish ();
3271 /* Output some stuff at end of file if nec. */
3273 end_final (dump_base_name
);
3275 if (branch_prob_dump
)
3276 open_dump_file (".bp", NULL
);
3278 TIMEVAR (dump_time
, end_branch_prob (rtl_dump_file
));
3280 if (branch_prob_dump
)
3281 close_dump_file (NULL
, NULL_RTX
);
3284 ASM_FILE_END (asm_out_file
);
3288 /* Language-specific end of compilation actions. */
3292 /* Close the dump files. */
3294 if (flag_gen_aux_info
)
3296 fclose (aux_info_file
);
3298 unlink (aux_info_file_name
);
3303 open_dump_file (".combine", NULL
);
3304 TIMEVAR (dump_time
, dump_combine_total_stats (rtl_dump_file
));
3305 close_dump_file (NULL
, NULL_RTX
);
3308 /* Close non-debugging input and output files. Take special care to note
3309 whether fclose returns an error, since the pages might still be on the
3310 buffer chain while the file is open. */
3314 if (! flag_syntax_only
3315 && (ferror (asm_out_file
) != 0 || fclose (asm_out_file
) != 0))
3316 fatal_io_error (asm_file_name
);
3318 /* Do whatever is necessary to finish printing the graphs. */
3319 if (graph_dump_format
!= no_graph
)
3322 finish_graph_dump_file (dump_base_name
, ".jump");
3324 finish_graph_dump_file (dump_base_name
, ".addressof");
3326 finish_graph_dump_file (dump_base_name
, ".cse");
3328 finish_graph_dump_file (dump_base_name
, ".loop");
3330 finish_graph_dump_file (dump_base_name
, ".cse2");
3331 if (branch_prob_dump
)
3332 finish_graph_dump_file (dump_base_name
, ".bp");
3334 finish_graph_dump_file (dump_base_name
, ".flow");
3336 finish_graph_dump_file (dump_base_name
, ".combine");
3338 finish_graph_dump_file (dump_base_name
, ".regmove");
3340 finish_graph_dump_file (dump_base_name
, ".sched");
3342 finish_graph_dump_file (dump_base_name
, ".lreg");
3343 if (global_reg_dump
)
3344 finish_graph_dump_file (dump_base_name
, ".greg");
3346 finish_graph_dump_file (dump_base_name
, ".flow2");
3348 finish_graph_dump_file (dump_base_name
, ".sched2");
3350 finish_graph_dump_file (dump_base_name
, ".jump2");
3353 finish_graph_dump_file (dump_base_name
, ".dbr");
3356 finish_graph_dump_file (dump_base_name
, ".gcse");
3359 finish_graph_dump_file (dump_base_name
, ".stack");
3361 #ifdef MACHINE_DEPENDENT_REORG
3362 if (mach_dep_reorg_dump
)
3363 finish_graph_dump_file (dump_base_name
, ".mach");
3367 /* Free up memory for the benefit of leak detectors. */
3370 /* Print the times. */
3374 all_time
= get_run_time ();
3376 fprintf (stderr
,"\n");
3378 print_time ("parse", parse_time
);
3379 print_time ("integration", integration_time
);
3380 print_time ("jump", jump_time
);
3381 print_time ("cse", cse_time
);
3382 print_time ("gcse", gcse_time
);
3383 print_time ("loop", loop_time
);
3384 print_time ("cse2", cse2_time
);
3385 print_time ("branch-prob", branch_prob_time
);
3386 print_time ("flow", flow_time
);
3387 print_time ("combine", combine_time
);
3388 print_time ("regmove", regmove_time
);
3389 print_time ("sched", sched_time
);
3390 print_time ("local-alloc", local_alloc_time
);
3391 print_time ("global-alloc", global_alloc_time
);
3392 print_time ("flow2", flow2_time
);
3393 print_time ("sched2", sched2_time
);
3395 print_time ("dbranch", dbr_sched_time
);
3397 print_time ("shorten-branch", shorten_branch_time
);
3398 print_time ("stack-reg", stack_reg_time
);
3399 print_time ("final", final_time
);
3400 print_time ("varconst", varconst_time
);
3401 print_time ("symout", symout_time
);
3402 print_time ("dump", dump_time
);
3403 print_time ("gc", gc_time
);
3407 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
3408 and TYPE_DECL nodes.
3410 This does nothing for local (non-static) variables.
3411 Otherwise, it sets up the RTL and outputs any assembler code
3412 (label definition, storage allocation and initialization).
3414 DECL is the declaration. If ASMSPEC is nonzero, it specifies
3415 the assembler symbol name to be used. TOP_LEVEL is nonzero
3416 if this declaration is not within a function. */
3419 rest_of_decl_compilation (decl
, asmspec
, top_level
, at_end
)
3421 const char *asmspec
;
3425 /* Declarations of variables, and of functions defined elsewhere. */
3427 /* The most obvious approach, to put an #ifndef around where
3428 this macro is used, doesn't work since it's inside a macro call. */
3429 #ifndef ASM_FINISH_DECLARE_OBJECT
3430 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
3433 /* Forward declarations for nested functions are not "external",
3434 but we need to treat them as if they were. */
3435 if (TREE_STATIC (decl
) || DECL_EXTERNAL (decl
)
3436 || TREE_CODE (decl
) == FUNCTION_DECL
)
3437 TIMEVAR (varconst_time
,
3439 make_decl_rtl (decl
, asmspec
, top_level
);
3440 /* Initialized extern variable exists to be replaced
3441 with its value, or represents something that will be
3442 output in another file. */
3443 if (! (TREE_CODE (decl
) == VAR_DECL
3444 && DECL_EXTERNAL (decl
) && TREE_READONLY (decl
)
3445 && DECL_INITIAL (decl
) != 0
3446 && DECL_INITIAL (decl
) != error_mark_node
))
3447 /* Don't output anything
3448 when a tentative file-scope definition is seen.
3449 But at end of compilation, do output code for them. */
3450 if (! (! at_end
&& top_level
3451 && (DECL_INITIAL (decl
) == 0
3452 || DECL_INITIAL (decl
) == error_mark_node
)))
3453 assemble_variable (decl
, top_level
, at_end
, 0);
3454 if (decl
== last_assemble_variable_decl
)
3456 ASM_FINISH_DECLARE_OBJECT (asm_out_file
, decl
,
3460 else if (DECL_REGISTER (decl
) && asmspec
!= 0)
3462 if (decode_reg_name (asmspec
) >= 0)
3464 DECL_RTL (decl
) = 0;
3465 make_decl_rtl (decl
, asmspec
, top_level
);
3468 error ("invalid register name `%s' for register variable", asmspec
);
3470 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3471 else if ((write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
3472 && TREE_CODE (decl
) == TYPE_DECL
)
3473 TIMEVAR (symout_time
, dbxout_symbol (decl
, 0));
3475 #ifdef SDB_DEBUGGING_INFO
3476 else if (write_symbols
== SDB_DEBUG
&& top_level
3477 && TREE_CODE (decl
) == TYPE_DECL
)
3478 TIMEVAR (symout_time
, sdbout_symbol (decl
, 0));
3482 /* Called after finishing a record, union or enumeral type. */
3485 rest_of_type_compilation (type
, toplev
)
3486 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
3490 tree type ATTRIBUTE_UNUSED
;
3491 int toplev ATTRIBUTE_UNUSED
;
3494 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3495 if (write_symbols
== DBX_DEBUG
|| write_symbols
== XCOFF_DEBUG
)
3496 TIMEVAR (symout_time
, dbxout_symbol (TYPE_STUB_DECL (type
), !toplev
));
3498 #ifdef SDB_DEBUGGING_INFO
3499 if (write_symbols
== SDB_DEBUG
)
3500 TIMEVAR (symout_time
, sdbout_symbol (TYPE_STUB_DECL (type
), !toplev
));
3504 /* This is called from finish_function (within yyparse)
3505 after each top-level definition is parsed.
3506 It is supposed to compile that function or variable
3507 and output the assembler code for it.
3508 After we return, the tree storage is freed. */
3511 rest_of_compilation (decl
)
3515 int start_time
= get_run_time ();
3517 /* Nonzero if we have saved the original DECL_INITIAL of the function,
3518 to be restored after we finish compiling the function
3519 (for use when compiling inline calls to this function). */
3520 tree saved_block_tree
= 0;
3521 /* Likewise, for DECL_ARGUMENTS. */
3522 tree saved_arguments
= 0;
3524 int rebuild_label_notes_after_reload
;
3526 /* If we are reconsidering an inline function
3527 at the end of compilation, skip the stuff for making it inline. */
3529 if (DECL_SAVED_INSNS (decl
) == 0)
3534 /* If requested, consider whether to make this function inline. */
3535 if (DECL_INLINE (decl
) || flag_inline_functions
)
3536 TIMEVAR (integration_time
,
3538 lose
= function_cannot_inline_p (decl
);
3539 if (lose
|| ! optimize
)
3541 if (warn_inline
&& DECL_INLINE (decl
))
3542 warning_with_decl (decl
, lose
);
3543 DECL_ABSTRACT_ORIGIN (decl
) = 0;
3544 /* Don't really compile an extern inline function.
3545 If we can't make it inline, pretend
3546 it was only declared. */
3547 if (DECL_EXTERNAL (decl
))
3549 DECL_INITIAL (decl
) = 0;
3550 goto exit_rest_of_compilation
;
3554 /* ??? Note that this has the effect of making it look
3555 like "inline" was specified for a function if we choose
3556 to inline it. This isn't quite right, but it's
3557 probably not worth the trouble to fix. */
3558 inlinable
= DECL_INLINE (decl
) = 1;
3561 insns
= get_insns ();
3563 /* Dump the rtl code if we are dumping rtl. */
3567 open_dump_file (".rtl", decl_printable_name (decl
, 2));
3569 if (DECL_SAVED_INSNS (decl
))
3570 fprintf (rtl_dump_file
, ";; (integrable)\n\n");
3572 close_dump_file (print_rtl
, insns
);
3575 /* If function is inline, and we don't yet know whether to
3576 compile it by itself, defer decision till end of compilation.
3577 finish_compilation will call rest_of_compilation again
3578 for those functions that need to be output. Also defer those
3579 functions that we are supposed to defer. */
3582 DECL_DEFER_OUTPUT (decl
) = 1;
3584 if (DECL_DEFER_OUTPUT (decl
)
3585 || (DECL_INLINE (decl
)
3586 && ((! TREE_PUBLIC (decl
) && ! TREE_ADDRESSABLE (decl
)
3587 && ! flag_keep_inline_functions
)
3588 || DECL_EXTERNAL (decl
))))
3590 DECL_DEFER_OUTPUT (decl
) = 1;
3592 /* If -Wreturn-type, we have to do a bit of compilation.
3593 However, if we just fall through we will call
3594 save_for_inline_copying() which results in excessive
3595 memory use. Instead, we just want to call
3596 jump_optimize() to figure out whether or not we can fall
3597 off the end of the function; we do the minimum amount of
3598 work necessary to make that safe. And, we set optimize
3599 to zero to keep jump_optimize from working too hard. */
3600 if (warn_return_type
)
3602 int saved_optimize
= optimize
;
3604 find_exception_handler_labels ();
3605 jump_optimize (get_insns(), !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
3606 !JUMP_AFTER_REGSCAN
);
3607 optimize
= saved_optimize
;
3610 #ifdef DWARF_DEBUGGING_INFO
3611 /* Generate the DWARF info for the "abstract" instance
3612 of a function which we may later generate inlined and/or
3613 out-of-line instances of. */
3614 if (write_symbols
== DWARF_DEBUG
)
3616 set_decl_abstract_flags (decl
, 1);
3617 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
3618 set_decl_abstract_flags (decl
, 0);
3621 #ifdef DWARF2_DEBUGGING_INFO
3622 /* Generate the DWARF2 info for the "abstract" instance
3623 of a function which we may later generate inlined and/or
3624 out-of-line instances of. */
3625 if (write_symbols
== DWARF2_DEBUG
)
3627 set_decl_abstract_flags (decl
, 1);
3628 TIMEVAR (symout_time
, dwarf2out_decl (decl
));
3629 set_decl_abstract_flags (decl
, 0);
3632 TIMEVAR (integration_time
, save_for_inline_nocopy (decl
));
3633 DECL_SAVED_INSNS (decl
)->inlinable
= inlinable
;
3634 goto exit_rest_of_compilation
;
3637 /* If specified extern inline but we aren't inlining it, we are
3638 done. This goes for anything that gets here with DECL_EXTERNAL
3639 set, not just things with DECL_INLINE. */
3640 if (DECL_EXTERNAL (decl
))
3641 goto exit_rest_of_compilation
;
3644 /* Initialize some variables used by the optimizers. */
3645 init_function_for_compilation ();
3647 if (! DECL_DEFER_OUTPUT (decl
))
3648 TREE_ASM_WRITTEN (decl
) = 1;
3650 /* Now that integrate will no longer see our rtl, we need not distinguish
3651 between the return value of this function and the return value of called
3653 rtx_equal_function_value_matters
= 0;
3655 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
3656 if ((rtl_dump_and_exit
|| flag_syntax_only
) && !warn_return_type
)
3658 goto exit_rest_of_compilation
;
3661 /* Emit code to get eh context, if needed. */
3665 /* If we are doing position-independent code generation, now
3666 is the time to output special prologues and epilogues.
3667 We do not want to do this earlier, because it just clutters
3668 up inline functions with meaningless insns. */
3673 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
3674 Note that that may have been done above, in save_for_inline_copying.
3675 The call to resume_temporary_allocation near the end of this function
3676 goes back to the usual state of affairs. This must be done after
3677 we've built up any unwinders for exception handling, and done
3678 the FINALIZE_PIC work, if necessary. */
3680 rtl_in_current_obstack ();
3682 insns
= get_insns ();
3684 /* Copy any shared structure that should not be shared. */
3686 unshare_all_rtl (insns
);
3688 init_EXPR_INSN_LIST_cache ();
3690 #ifdef SETJMP_VIA_SAVE_AREA
3691 /* This must be performed before virutal register instantiation. */
3692 if (current_function_calls_alloca
)
3693 optimize_save_area_alloca (insns
);
3696 /* Instantiate all virtual registers. */
3698 instantiate_virtual_regs (current_function_decl
, get_insns ());
3700 /* See if we have allocated stack slots that are not directly addressable.
3701 If so, scan all the insns and create explicit address computation
3702 for all references to such slots. */
3703 /* fixup_stack_slots (); */
3705 /* Find all the EH handlers. */
3706 find_exception_handler_labels ();
3708 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
3709 are initialized and to compute whether control can drop off the end
3711 TIMEVAR (jump_time
, reg_scan (insns
, max_reg_num (), 0));
3712 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
, !JUMP_NOOP_MOVES
,
3713 JUMP_AFTER_REGSCAN
));
3715 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
3716 if (rtl_dump_and_exit
|| flag_syntax_only
|| DECL_DEFER_OUTPUT (decl
))
3717 goto exit_rest_of_compilation
;
3719 /* Dump rtl code after jump, if we are doing that. */
3721 dump_rtl (".jump", decl
, print_rtl
, insns
);
3726 /* Perform common subexpression elimination.
3727 Nonzero value from `cse_main' means that jumps were simplified
3728 and some code may now be unreachable, so do
3729 jump optimization again. */
3734 open_dump_file (".cse", decl_printable_name (decl
, 2));
3736 TIMEVAR (cse_time
, reg_scan (insns
, max_reg_num (), 1));
3738 if (flag_thread_jumps
)
3739 /* Hacks by tiemann & kenner. */
3740 TIMEVAR (jump_time
, thread_jumps (insns
, max_reg_num (), 1));
3742 TIMEVAR (cse_time
, tem
= cse_main (insns
, max_reg_num (),
3744 TIMEVAR (cse_time
, delete_trivially_dead_insns (insns
, max_reg_num ()));
3746 if (tem
|| optimize
> 1)
3747 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3749 !JUMP_AFTER_REGSCAN
));
3751 /* Dump rtl code after cse, if we are doing that. */
3755 close_dump_file (print_rtl
, insns
);
3756 if (graph_dump_format
!= no_graph
)
3757 print_rtl_graph_with_bb (dump_base_name
, ".cse", insns
);
3761 purge_addressof (insns
);
3762 reg_scan (insns
, max_reg_num (), 1);
3766 dump_rtl (".addressof", decl
, print_rtl
, insns
);
3767 if (graph_dump_format
!= no_graph
)
3768 print_rtl_graph_with_bb (dump_base_name
, ".addressof", insns
);
3774 /* Perform global cse. */
3776 if (optimize
> 0 && flag_gcse
)
3779 open_dump_file (".gcse", decl_printable_name (decl
, 2));
3781 TIMEVAR (gcse_time
, tem
= gcse_main (insns
, rtl_dump_file
));
3783 /* If gcse altered any jumps, rerun jump optimizations to clean
3787 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3789 !JUMP_AFTER_REGSCAN
));
3794 close_dump_file (print_rtl
, insns
);
3795 if (graph_dump_format
!= no_graph
)
3796 print_rtl_graph_with_bb (dump_base_name
, ".gcse", insns
);
3802 /* Move constant computations out of loops. */
3807 open_dump_file (".loop", decl_printable_name (decl
, 2));
3812 if (flag_rerun_loop_opt
)
3814 /* We only want to perform unrolling once. */
3816 loop_optimize (insns
, rtl_dump_file
, 0, 0);
3819 /* The first call to loop_optimize makes some instructions
3820 trivially dead. We delete those instructions now in the
3821 hope that doing so will make the heuristics in loop work
3822 better and possibly speed up compilation. */
3823 delete_trivially_dead_insns (insns
, max_reg_num ());
3825 /* The regscan pass is currently necessary as the alias
3826 analysis code depends on this information. */
3827 reg_scan (insns
, max_reg_num (), 1);
3829 loop_optimize (insns
, rtl_dump_file
, flag_unroll_loops
, 1);
3832 /* Dump rtl code after loop opt, if we are doing that. */
3836 close_dump_file (print_rtl
, insns
);
3837 if (graph_dump_format
!= no_graph
)
3838 print_rtl_graph_with_bb (dump_base_name
, ".loop", insns
);
3848 open_dump_file (".cse2", decl_printable_name (decl
, 2));
3850 if (flag_rerun_cse_after_loop
)
3852 /* Running another jump optimization pass before the second
3853 cse pass sometimes simplifies the RTL enough to allow
3854 the second CSE pass to do a better job. Jump_optimize can change
3855 max_reg_num so we must rerun reg_scan afterwards.
3856 ??? Rework to not call reg_scan so often. */
3857 TIMEVAR (jump_time
, reg_scan (insns
, max_reg_num (), 0));
3858 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3860 JUMP_AFTER_REGSCAN
));
3862 TIMEVAR (cse2_time
, reg_scan (insns
, max_reg_num (), 0));
3863 TIMEVAR (cse2_time
, tem
= cse_main (insns
, max_reg_num (),
3866 TIMEVAR (jump_time
, jump_optimize (insns
, !JUMP_CROSS_JUMP
,
3868 !JUMP_AFTER_REGSCAN
));
3871 if (flag_thread_jumps
)
3873 /* This pass of jump threading straightens out code
3874 that was kinked by loop optimization. */
3875 TIMEVAR (jump_time
, reg_scan (insns
, max_reg_num (), 0));
3876 TIMEVAR (jump_time
, thread_jumps (insns
, max_reg_num (), 0));
3879 /* Dump rtl code after cse, if we are doing that. */
3883 close_dump_file (print_rtl
, insns
);
3884 if (graph_dump_format
!= no_graph
)
3885 print_rtl_graph_with_bb (dump_base_name
, ".cse2", insns
);
3892 if (profile_arc_flag
|| flag_test_coverage
|| flag_branch_probabilities
)
3894 if (branch_prob_dump
)
3895 open_dump_file (".bp", decl_printable_name (decl
, 2));
3900 branch_prob (insns
, rtl_dump_file
);
3903 if (branch_prob_dump
)
3905 close_dump_file (print_rtl
, insns
);
3906 if (graph_dump_format
!= no_graph
)
3907 print_rtl_graph_with_bb (dump_base_name
, ".bp", insns
);
3914 /* We are no longer anticipating cse in this function, at least. */
3916 cse_not_expected
= 1;
3918 /* Now we choose between stupid (pcc-like) register allocation
3919 (if we got the -noreg switch and not -opt)
3920 and smart register allocation. */
3922 if (optimize
> 0) /* Stupid allocation probably won't work */
3923 obey_regdecls
= 0; /* if optimizations being done. */
3927 /* Print function header into flow dump now
3928 because doing the flow analysis makes some of the dump. */
3931 open_dump_file (".flow", decl_printable_name (decl
, 2));
3937 regclass (insns
, max_reg_num ());
3938 stupid_life_analysis (insns
, max_reg_num (),
3944 /* Do control and data flow analysis,
3945 and write some of the results to dump file. */
3950 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
, 1);
3951 life_analysis (insns
, max_reg_num (), rtl_dump_file
, 1);
3954 if (warn_uninitialized
)
3956 uninitialized_vars_warning (DECL_INITIAL (decl
));
3957 setjmp_args_warning ();
3961 /* Dump rtl after flow analysis. */
3965 close_dump_file (print_rtl_with_bb
, insns
);
3966 if (graph_dump_format
!= no_graph
)
3967 print_rtl_graph_with_bb (dump_base_name
, ".flow", insns
);
3973 /* The first life analysis pass has finished. From now on we can not
3974 generate any new pseudos. */
3977 /* If -opt, try combining insns through substitution. */
3981 TIMEVAR (combine_time
, combine_instructions (insns
, max_reg_num ()));
3983 /* Dump rtl code after insn combination. */
3987 dump_rtl (".combine", decl
, print_rtl_with_bb
, insns
);
3988 if (graph_dump_format
!= no_graph
)
3989 print_rtl_graph_with_bb (dump_base_name
, ".combine", insns
);
3996 /* Register allocation pre-pass, to reduce number of moves
3997 necessary for two-address machines. */
3998 if (optimize
> 0 && (flag_regmove
|| flag_expensive_optimizations
))
4001 open_dump_file (".regmove", decl_printable_name (decl
, 2));
4003 TIMEVAR (regmove_time
, regmove_optimize (insns
, max_reg_num (),
4008 close_dump_file (print_rtl_with_bb
, insns
);
4009 if (graph_dump_format
!= no_graph
)
4010 print_rtl_graph_with_bb (dump_base_name
, ".regmove", insns
);
4017 /* Print function header into sched dump now
4018 because doing the sched analysis makes some of the dump. */
4020 if (optimize
> 0 && flag_schedule_insns
)
4023 open_dump_file (".sched", decl_printable_name (decl
, 2));
4025 /* Do control and data sched analysis,
4026 and write some of the results to dump file. */
4028 TIMEVAR (sched_time
, schedule_insns (rtl_dump_file
));
4030 /* Dump rtl after instruction scheduling. */
4034 close_dump_file (print_rtl_with_bb
, insns
);
4035 if (graph_dump_format
!= no_graph
)
4036 print_rtl_graph_with_bb (dump_base_name
, ".sched", insns
);
4043 /* Determine if the current function is a leaf before running reload
4044 since this can impact optimizations done by the prologue and
4045 epilogue thus changing register elimination offsets. */
4046 current_function_is_leaf
= leaf_function_p ();
4048 /* Unless we did stupid register allocation,
4049 allocate pseudo-regs that are used only within 1 basic block.
4051 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
4052 jump optimizer after register allocation and reloading are finished. */
4055 TIMEVAR (local_alloc_time
,
4057 recompute_reg_usage (insns
, ! optimize_size
);
4058 regclass (insns
, max_reg_num ());
4059 rebuild_label_notes_after_reload
= local_alloc ();
4062 rebuild_label_notes_after_reload
= 0;
4064 /* Dump rtl code after allocating regs within basic blocks. */
4068 open_dump_file (".lreg", decl_printable_name (decl
, 2));
4070 TIMEVAR (dump_time
, dump_flow_info (rtl_dump_file
));
4071 TIMEVAR (dump_time
, dump_local_alloc (rtl_dump_file
));
4073 close_dump_file (print_rtl_with_bb
, insns
);
4074 if (graph_dump_format
!= no_graph
)
4075 print_rtl_graph_with_bb (dump_base_name
, ".lreg", insns
);
4081 if (global_reg_dump
)
4082 open_dump_file (".greg", decl_printable_name (decl
, 2));
4084 /* Unless we did stupid register allocation,
4085 allocate remaining pseudo-regs, then do the reload pass
4086 fixing up any insns that are invalid. */
4088 TIMEVAR (global_alloc_time
,
4091 failure
= global_alloc (rtl_dump_file
);
4093 failure
= reload (insns
, 0, rtl_dump_file
);
4098 goto exit_rest_of_compilation
;
4103 /* Do a very simple CSE pass over just the hard registers. */
4105 reload_cse_regs (insns
);
4107 /* Register allocation and reloading may have turned an indirect jump into
4108 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
4109 jumping instructions. */
4110 if (rebuild_label_notes_after_reload
)
4111 TIMEVAR (jump_time
, rebuild_jump_labels (insns
));
4113 /* If optimizing and we are performing instruction scheduling after
4114 reload, then go ahead and split insns now since we are about to
4115 recompute flow information anyway.
4117 reload_cse_regs may expose more splitting opportunities, expecially
4118 for double-word operations. */
4119 if (optimize
> 0 && flag_schedule_insns_after_reload
)
4123 for (insn
= insns
; insn
; insn
= NEXT_INSN (insn
))
4127 if (GET_RTX_CLASS (GET_CODE (insn
)) != 'i')
4130 last
= try_split (PATTERN (insn
), insn
, 1);
4134 PUT_CODE (insn
, NOTE
);
4135 NOTE_SOURCE_FILE (insn
) = 0;
4136 NOTE_LINE_NUMBER (insn
) = NOTE_INSN_DELETED
;
4141 if (global_reg_dump
)
4143 TIMEVAR (dump_time
, dump_global_regs (rtl_dump_file
));
4144 close_dump_file (print_rtl_with_bb
, insns
);
4145 if (graph_dump_format
!= no_graph
)
4146 print_rtl_graph_with_bb (dump_base_name
, ".greg", insns
);
4149 /* Re-create the death notes which were deleted during reload. */
4151 open_dump_file (".flow2", decl_printable_name (decl
, 2));
4158 find_basic_blocks (insns
, max_reg_num (), rtl_dump_file
, 1);
4159 life_analysis (insns
, max_reg_num (), rtl_dump_file
, 1);
4166 flow2_completed
= 1;
4168 /* On some machines, the prologue and epilogue code, or parts thereof,
4169 can be represented as RTL. Doing so lets us schedule insns between
4170 it and the rest of the code and also allows delayed branch
4171 scheduling to operate in the epilogue. */
4173 thread_prologue_and_epilogue_insns (insns
);
4177 close_dump_file (print_rtl_with_bb
, insns
);
4178 if (graph_dump_format
!= no_graph
)
4179 print_rtl_graph_with_bb (dump_base_name
, ".flow2", insns
);
4182 #ifdef HAVE_peephole2
4183 if (optimize
> 0 && flag_peephole2
)
4186 open_dump_file (".peephole2", decl_printable_name (decl
, 2));
4188 peephole2_optimize (rtl_dump_file
);
4192 close_dump_file (print_rtl_with_bb
, insns
);
4193 if (graph_dump_format
!= no_graph
)
4194 print_rtl_graph_with_bb (dump_base_name
, ".peephole2", insns
);
4199 if (optimize
> 0 && flag_schedule_insns_after_reload
)
4202 open_dump_file (".sched2", decl_printable_name (decl
, 2));
4204 /* Do control and data sched analysis again,
4205 and write some more of the results to dump file. */
4207 TIMEVAR (sched2_time
, schedule_insns (rtl_dump_file
));
4209 /* Dump rtl after post-reorder instruction scheduling. */
4213 close_dump_file (print_rtl_with_bb
, insns
);
4214 if (graph_dump_format
!= no_graph
)
4215 print_rtl_graph_with_bb (dump_base_name
, ".sched2", insns
);
4222 #ifdef LEAF_REGISTERS
4223 current_function_uses_only_leaf_regs
4224 = optimize
> 0 && only_leaf_regs_used () && leaf_function_p ();
4227 /* One more attempt to remove jumps to .+1
4228 left by dead-store-elimination.
4229 Also do cross-jumping this time
4230 and delete no-op move insns. */
4234 TIMEVAR (jump_time
, jump_optimize (insns
, JUMP_CROSS_JUMP
,
4236 !JUMP_AFTER_REGSCAN
));
4238 /* Dump rtl code after jump, if we are doing that. */
4242 dump_rtl (".jump2", decl
, print_rtl_with_bb
, insns
);
4243 if (graph_dump_format
!= no_graph
)
4244 print_rtl_graph_with_bb (dump_base_name
, ".jump2", insns
);
4248 /* If a machine dependent reorganization is needed, call it. */
4249 #ifdef MACHINE_DEPENDENT_REORG
4250 if (mach_dep_reorg_dump
)
4251 open_dump_file (".mach", decl_printable_name (decl
, 2));
4253 MACHINE_DEPENDENT_REORG (insns
);
4255 if (mach_dep_reorg_dump
)
4257 close_dump_file (print_rtl_with_bb
, insns
);
4258 if (graph_dump_format
!= no_graph
)
4259 print_rtl_graph_with_bb (dump_base_name
, ".mach", insns
);
4266 /* If a scheduling pass for delayed branches is to be done,
4267 call the scheduling code. */
4270 if (optimize
> 0 && flag_delayed_branch
)
4273 open_dump_file (".dbr", decl_printable_name (decl
, 2));
4275 TIMEVAR (dbr_sched_time
, dbr_schedule (insns
, rtl_dump_file
));
4279 close_dump_file (print_rtl_with_bb
, insns
);
4280 if (graph_dump_format
!= no_graph
)
4281 print_rtl_graph_with_bb (dump_base_name
, ".dbr", insns
);
4289 /* Shorten branches. */
4290 TIMEVAR (shorten_branch_time
,
4292 shorten_branches (get_insns ());
4297 open_dump_file (".stack", decl_printable_name (decl
, 2));
4299 TIMEVAR (stack_reg_time
, reg_to_stack (insns
, rtl_dump_file
));
4303 dump_rtl (".stack", decl
, print_rtl_with_bb
, insns
);
4304 if (graph_dump_format
!= no_graph
)
4305 print_rtl_graph_with_bb (dump_base_name
, ".stack", insns
);
4312 /* Now turn the rtl into assembler code. */
4314 TIMEVAR (final_time
,
4319 /* Get the function's name, as described by its RTL.
4320 This may be different from the DECL_NAME name used
4321 in the source file. */
4323 x
= DECL_RTL (decl
);
4324 if (GET_CODE (x
) != MEM
)
4327 if (GET_CODE (x
) != SYMBOL_REF
)
4329 fnname
= XSTR (x
, 0);
4331 assemble_start_function (decl
, fnname
);
4332 final_start_function (insns
, asm_out_file
, optimize
);
4333 final (insns
, asm_out_file
, optimize
, 0);
4334 final_end_function (insns
, asm_out_file
, optimize
);
4335 assemble_end_function (decl
, fnname
);
4337 fflush (asm_out_file
);
4339 /* Release all memory allocated by flow. */
4340 free_basic_block_vars (0);
4342 /* Release all memory held by regsets now */
4343 regset_release_memory ();
4349 /* Write DBX symbols if requested */
4351 /* Note that for those inline functions where we don't initially
4352 know for certain that we will be generating an out-of-line copy,
4353 the first invocation of this routine (rest_of_compilation) will
4354 skip over this code by doing a `goto exit_rest_of_compilation;'.
4355 Later on, finish_compilation will call rest_of_compilation again
4356 for those inline functions that need to have out-of-line copies
4357 generated. During that call, we *will* be routed past here. */
4359 #ifdef DBX_DEBUGGING_INFO
4360 if (write_symbols
== DBX_DEBUG
)
4361 TIMEVAR (symout_time
, dbxout_function (decl
));
4364 #ifdef DWARF_DEBUGGING_INFO
4365 if (write_symbols
== DWARF_DEBUG
)
4366 TIMEVAR (symout_time
, dwarfout_file_scope_decl (decl
, 0));
4369 #ifdef DWARF2_DEBUGGING_INFO
4370 if (write_symbols
== DWARF2_DEBUG
)
4371 TIMEVAR (symout_time
, dwarf2out_decl (decl
));
4374 exit_rest_of_compilation
:
4378 /* In case the function was not output,
4379 don't leave any temporary anonymous types
4380 queued up for sdb output. */
4381 #ifdef SDB_DEBUGGING_INFO
4382 if (write_symbols
== SDB_DEBUG
)
4383 sdbout_types (NULL_TREE
);
4386 /* Put back the tree of subblocks and list of arguments
4387 from before we copied them.
4388 Code generation and the output of debugging info may have modified
4389 the copy, but the original is unchanged. */
4391 if (saved_block_tree
!= 0)
4393 DECL_INITIAL (decl
) = saved_block_tree
;
4394 DECL_ARGUMENTS (decl
) = saved_arguments
;
4395 DECL_ABSTRACT_ORIGIN (decl
) = NULL_TREE
;
4398 reload_completed
= 0;
4399 flow2_completed
= 0;
4402 TIMEVAR (final_time
,
4404 /* Clear out the insn_length contents now that they are no
4406 init_insn_lengths ();
4408 /* Clear out the real_constant_chain before some of the rtx's
4409 it runs through become garbage. */
4410 clear_const_double_mem ();
4412 /* Cancel the effect of rtl_in_current_obstack. */
4413 resume_temporary_allocation ();
4415 /* Show no temporary slots allocated. */
4419 /* Make sure volatile mem refs aren't considered valid operands for
4420 arithmetic insns. We must call this here if this is a nested inline
4421 function, since the above code leaves us in the init_recog state
4422 (from final.c), and the function context push/pop code does not
4423 save/restore volatile_ok.
4425 ??? Maybe it isn't necessary for expand_start_function to call this
4426 anymore if we do it here? */
4428 init_recog_no_volatile ();
4430 /* We're done with this function. */
4431 if (! DECL_DEFER_OUTPUT (decl
))
4432 free_after_compilation (current_function
);
4434 current_function
= 0;
4438 /* The parsing time is all the time spent in yyparse
4439 *except* what is spent in this function. */
4441 parse_time
-= get_run_time () - start_time
;
4443 /* Reset global variables. */
4444 free_basic_block_vars (0);
4455 printf ("Usage: %s input [switches]\n", progname
);
4456 printf ("Switches:\n");
4458 printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
4459 printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
4460 printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
4461 printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
4463 for (i
= NUM_ELEM (f_options
); i
--;)
4465 const char * description
= f_options
[i
].description
;
4467 if (description
!= NULL
&& * description
!= 0)
4468 printf (" -f%-21s %s\n",
4469 f_options
[i
].string
, description
);
4472 printf (" -O[number] Set optimisation level to [number]\n");
4473 printf (" -Os Optimise for space rather than speed\n");
4474 printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
4475 printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
4476 printf (" -w Suppress warnings\n");
4477 printf (" -W Enable extra warnings\n");
4479 for (i
= NUM_ELEM (W_options
); i
--;)
4481 const char * description
= W_options
[i
].description
;
4483 if (description
!= NULL
&& * description
!= 0)
4484 printf (" -W%-21s %s\n",
4485 W_options
[i
].string
, description
);
4488 printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
4489 printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
4490 printf (" -p Enable function profiling\n");
4491 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
4492 printf (" -a Enable block profiling \n");
4494 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
4495 printf (" -ax Enable jump profiling \n");
4497 printf (" -o <file> Place output into <file> \n");
4498 printf (" -G <number> Put global and static data smaller than <number>\n");
4499 printf (" bytes into a special section (on some targets)\n");
4501 for (i
= NUM_ELEM (debug_args
); i
--;)
4503 if (debug_args
[i
].description
!= NULL
)
4504 printf (" -%-22s %s\n", debug_args
[i
].arg
, debug_args
[i
].description
);
4507 printf (" -aux-info <file> Emit declaration info into <file>.X\n");
4508 printf (" -quiet Do not display functions compiled or elapsed time\n");
4509 printf (" -version Display the compiler's version\n");
4510 printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
4511 printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
4512 #if defined INSN_SCHEDULING
4513 printf (" -sched-verbose=<number> Set the verbosity level of the scheduler\n");
4515 printf (" --help Display this information\n");
4520 /* Display descriptions of language specific options.
4521 If there is no description, note that there is an undocumented option.
4522 If the description is empty, do not display anything. (This allows
4523 options to be deliberately undocumented, for whatever reason).
4524 If the option string is missing, then this is a marker, indicating
4525 that the description string is in fact the name of a language, whose
4526 language specific options are to follow. */
4528 if (NUM_ELEM (documented_lang_options
) > 1)
4530 printf ("\nLanguage specific options:\n");
4532 for (i
= 0; i
< NUM_ELEM (documented_lang_options
); i
++)
4534 const char * description
= documented_lang_options
[i
].description
;
4535 const char * option
= documented_lang_options
[i
].option
;
4537 if (description
== NULL
)
4542 printf (" %-23.23s [undocumented]\n", option
);
4544 else if (* description
== 0)
4546 else if (option
== NULL
)
4550 ("\nThere are undocumented %s specific options as well.\n",
4554 printf ("\n Options for %s:\n", description
);
4559 printf (" %-23.23s %s\n", option
, description
);
4564 printf ("\nThere are undocumented %s specific options as well.\n", lang
);
4566 if (NUM_ELEM (target_switches
) > 1
4567 #ifdef TARGET_OPTIONS
4568 || NUM_ELEM (target_options
) > 1
4576 printf ("\nTarget specific options:\n");
4578 for (i
= NUM_ELEM (target_switches
); i
--;)
4580 const char * option
= target_switches
[i
].name
;
4581 const char * description
= target_switches
[i
].description
;
4583 if (option
== NULL
|| * option
== 0)
4585 else if (description
== NULL
)
4590 printf (" -m%-21.21s [undocumented]\n", option
);
4592 else if (* description
!= 0)
4593 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
4596 #ifdef TARGET_OPTIONS
4597 for (i
= NUM_ELEM (target_options
); i
--;)
4599 const char * option
= target_options
[i
].prefix
;
4600 const char * description
= target_options
[i
].description
;
4602 if (option
== NULL
|| * option
== 0)
4604 else if (description
== NULL
)
4609 printf (" -m%-21.21s [undocumented]\n", option
);
4611 else if (* description
!= 0)
4612 doc
+= printf (" -m%-21.21s %s\n", option
, description
);
4618 printf ("\nThere are undocumented target specific options as well.\n");
4620 printf (" They exist, but they are not documented.\n");
4625 /* Compare the user specified 'option' with the language
4626 specific 'lang_option'. Return true if they match, or
4627 if 'option' is a viable prefix of 'lang_option'. */
4630 check_lang_option (option
, lang_option
)
4634 lang_independent_options
* indep_options
;
4639 /* Ignore NULL entries. */
4640 if (option
== NULL
|| lang_option
== NULL
)
4643 if ((space
= strchr (lang_option
, ' ')) != NULL
)
4644 len
= space
- lang_option
;
4646 len
= strlen (lang_option
);
4648 /* If they do not match to the first n characters then fail. */
4649 if (strncmp (option
, lang_option
, len
) != 0)
4652 /* Do not accept a lang option, if it matches a normal -f or -W
4653 option. Chill defines a -fpack, but we want to support
4656 /* An exact match is OK */
4657 if ((int) strlen (option
) == len
)
4660 /* If it is not an -f or -W option allow the match */
4661 if (option
[0] != '-')
4666 case 'f': indep_options
= f_options
; break;
4667 case 'W': indep_options
= W_options
; break;
4671 /* The option is a -f or -W option.
4672 Skip past the prefix and search for the remainder in the
4673 appropriate table of options. */
4676 if (option
[0] == 'n' && option
[1] == 'o' && option
[2] == '-')
4679 for (k
= NUM_ELEM (indep_options
); k
--;)
4681 if (!strcmp (option
, indep_options
[k
].string
))
4683 /* The option matched a language independent option,
4684 do not allow the language specific match. */
4690 /* The option matches the start of the langauge specific option
4691 and it is not an exact match for a language independent option. */
4695 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4696 Exit code is 35 if can't open files, 34 if fatal error,
4697 33 if had nonfatal errors, else success. */
4706 int flag_print_mem
= 0;
4707 int version_flag
= 0;
4710 /* save in case md file wants to emit args as a comment. */
4714 p
= argv
[0] + strlen (argv
[0]);
4715 while (p
!= argv
[0] && p
[-1] != '/'
4716 #ifdef DIR_SEPARATOR
4717 && p
[-1] != DIR_SEPARATOR
4723 #if defined (RLIMIT_STACK) && defined (HAVE_GETRLIMIT) && defined (HAVE_SETRLIMIT)
4724 /* Get rid of any avoidable limit on stack size. */
4728 /* Set the stack limit huge so that alloca does not fail. */
4729 getrlimit (RLIMIT_STACK
, &rlim
);
4730 rlim
.rlim_cur
= rlim
.rlim_max
;
4731 setrlimit (RLIMIT_STACK
, &rlim
);
4735 #ifdef HAVE_LC_MESSAGES
4736 setlocale (LC_MESSAGES
, "");
4738 (void) bindtextdomain (PACKAGE
, localedir
);
4739 (void) textdomain (PACKAGE
);
4741 signal (SIGFPE
, float_signal
);
4744 signal (SIGPIPE
, pipe_closed
);
4747 decl_printable_name
= decl_name
;
4748 lang_expand_expr
= (lang_expand_expr_t
) do_abort
;
4750 /* Initialize whether `char' is signed. */
4751 flag_signed_char
= DEFAULT_SIGNED_CHAR
;
4752 #ifdef DEFAULT_SHORT_ENUMS
4753 /* Initialize how much space enums occupy, by default. */
4754 flag_short_enums
= DEFAULT_SHORT_ENUMS
;
4757 /* Perform language-specific options intialization. */
4758 lang_init_options ();
4760 /* Scan to see what optimization level has been specified. That will
4761 determine the default value of many flags. */
4762 for (i
= 1; i
< argc
; i
++)
4764 if (!strcmp (argv
[i
], "-O"))
4769 else if (argv
[i
][0] == '-' && argv
[i
][1] == 'O')
4771 /* Handle -Os, -O2, -O3, -O69, ... */
4772 char *p
= &argv
[i
][2];
4774 if ((p
[0] == 's') && (p
[1] == 0))
4778 /* Optimizing for size forces optimize to be 2. */
4783 const int optimize_val
= read_integral_parameter (p
, p
- 2, -1);
4784 if (optimize_val
!= -1)
4786 optimize
= optimize_val
;
4793 obey_regdecls
= (optimize
== 0);
4798 flag_thread_jumps
= 1;
4800 flag_delayed_branch
= 1;
4802 #ifdef CAN_DEBUG_WITHOUT_FP
4803 flag_omit_frame_pointer
= 1;
4809 flag_cse_follow_jumps
= 1;
4810 flag_cse_skip_blocks
= 1;
4812 flag_expensive_optimizations
= 1;
4813 flag_strength_reduce
= 1;
4814 flag_rerun_cse_after_loop
= 1;
4815 flag_rerun_loop_opt
= 1;
4816 flag_caller_saves
= 1;
4819 #ifdef INSN_SCHEDULING
4820 flag_schedule_insns
= 1;
4821 flag_schedule_insns_after_reload
= 1;
4824 flag_strict_aliasing
= 1;
4829 flag_inline_functions
= 1;
4832 if (optimize
< 2 || optimize_size
)
4837 align_functions
= 1;
4840 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4843 set_target_switch ("");
4845 #ifdef OPTIMIZATION_OPTIONS
4846 /* Allow default optimizations to be specified on a per-machine basis. */
4847 OPTIMIZATION_OPTIONS (optimize
, optimize_size
);
4850 /* Initialize register usage now so switches may override. */
4853 for (i
= 1; i
< argc
; i
++)
4857 /* If this is a language-specific option,
4858 decode it in a language-specific way. */
4859 for (j
= NUM_ELEM (documented_lang_options
); j
--;)
4860 if (check_lang_option (argv
[i
], documented_lang_options
[j
].option
))
4863 if (j
!= (size_t)-1)
4865 /* If the option is valid for *some* language,
4866 treat it as valid even if this language doesn't understand it. */
4867 int strings_processed
= lang_decode_option (argc
- i
, argv
+ i
);
4869 if (!strcmp (argv
[i
], "--help"))
4875 if (strings_processed
!= 0)
4876 i
+= strings_processed
- 1;
4878 else if (argv
[i
][0] == '-' && argv
[i
][1] != 0)
4880 register char *str
= argv
[i
] + 1;
4885 set_target_switch (&str
[1]);
4886 else if (!strcmp (str
, "dumpbase"))
4888 dump_base_name
= argv
[++i
];
4890 else if (str
[0] == 'd')
4892 register char *p
= &str
[1];
4897 branch_prob_dump
= 1;
4904 global_reg_dump
= 1;
4912 cse_dump
= 1, cse2_dump
= 1;
4919 #ifdef MACHINE_DEPENDENT_REORG
4920 mach_dep_reorg_dump
= 1;
4928 branch_prob_dump
= 1;
4945 global_reg_dump
= 1;
4970 #ifdef MACHINE_DEPENDENT_REORG
4972 mach_dep_reorg_dump
= 1;
4976 flag_print_asm_name
= 1;
4997 graph_dump_format
= vcg
;
5003 rtl_dump_and_exit
= 1;
5011 case 'D': /* these are handled by the preprocessor */
5015 warning ("unrecognised gcc debugging option: %c", p
[-1]);
5019 else if (str
[0] == 'f')
5021 register char *p
= &str
[1];
5024 /* Some kind of -f option.
5025 P's value is the option sans `-f'.
5026 Search for it in the table of options. */
5029 !found
&& j
< sizeof (f_options
) / sizeof (f_options
[0]);
5032 if (!strcmp (p
, f_options
[j
].string
))
5034 *f_options
[j
].variable
= f_options
[j
].on_value
;
5035 /* A goto here would be cleaner,
5036 but breaks the vax pcc. */
5039 if (p
[0] == 'n' && p
[1] == 'o' && p
[2] == '-'
5040 && ! strcmp (p
+3, f_options
[j
].string
))
5042 *f_options
[j
].variable
= ! f_options
[j
].on_value
;
5049 else if (!strncmp (p
, "inline-limit-", 13)
5050 || !strncmp (p
, "inline-limit=", 13))
5052 read_integral_parameter (p
+ 13, p
- 2, inline_max_insns
);
5053 #ifdef INSN_SCHEDULING
5054 else if (!strncmp (p
, "sched-verbose=",14))
5055 fix_sched_param("verbose",&p
[14]);
5057 else if (!strncmp (p
, "fixed-", 6))
5058 fix_register (&p
[6], 1, 1);
5059 else if (!strncmp (p
, "call-used-", 10))
5060 fix_register (&p
[10], 0, 1);
5061 else if (!strncmp (p
, "call-saved-", 11))
5062 fix_register (&p
[11], 0, 0);
5063 else if (!strncmp (p
, "align-loops=", 12))
5064 align_loops
= read_integral_parameter (p
+ 12, p
- 2,
5066 else if (!strncmp (p
, "align-functions=", 16))
5067 align_functions
= read_integral_parameter (p
+ 16, p
- 2,
5069 else if (!strncmp (p
, "align-jumps=", 12))
5070 align_jumps
= read_integral_parameter (p
+ 12, p
- 2,
5072 else if (!strncmp (p
, "align-labels=", 13))
5073 align_labels
= read_integral_parameter (p
+ 13, p
- 2,
5076 error ("Invalid option `%s'", argv
[i
]);
5078 else if (str
[0] == 'O')
5080 /* Already been treated above. Do nothing. */
5082 else if (!strcmp (str
, "pedantic"))
5084 else if (!strcmp (str
, "pedantic-errors"))
5085 flag_pedantic_errors
= pedantic
= 1;
5086 else if (!strcmp (str
, "quiet"))
5088 else if (!strcmp (str
, "version"))
5090 else if (!strcmp (str
, "w"))
5091 inhibit_warnings
= 1;
5092 else if (!strcmp (str
, "W"))
5095 /* We save the value of warn_uninitialized, since if they put
5096 -Wuninitialized on the command line, we need to generate a
5097 warning about not using it without also specifying -O. */
5098 if (warn_uninitialized
!= 1)
5099 warn_uninitialized
= 2;
5101 else if (str
[0] == 'W')
5103 register char *p
= &str
[1];
5106 /* Some kind of -W option.
5107 P's value is the option sans `-W'.
5108 Search for it in the table of options. */
5111 !found
&& j
< sizeof (W_options
) / sizeof (W_options
[0]);
5114 if (!strcmp (p
, W_options
[j
].string
))
5116 *W_options
[j
].variable
= W_options
[j
].on_value
;
5117 /* A goto here would be cleaner,
5118 but breaks the vax pcc. */
5121 if (p
[0] == 'n' && p
[1] == 'o' && p
[2] == '-'
5122 && ! strcmp (p
+3, W_options
[j
].string
))
5124 *W_options
[j
].variable
= ! W_options
[j
].on_value
;
5131 else if (!strncmp (p
, "id-clash-", 9))
5133 const int id_clash_val
5134 = read_integral_parameter (p
+ 9, p
- 2, -1);
5135 if (id_clash_val
!= -1)
5137 id_clash_len
= id_clash_val
;
5141 else if (!strncmp (p
, "larger-than-", 12))
5143 const int larger_than_val
5144 = read_integral_parameter (p
+ 12, p
- 2, -1);
5145 if (larger_than_val
!= -1)
5147 larger_than_size
= larger_than_val
;
5148 warn_larger_than
= 1;
5152 error ("Invalid option `%s'", argv
[i
]);
5154 else if (!strcmp (str
, "p"))
5158 else if (!strcmp (str
, "a"))
5160 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
5161 warning ("`-a' option (basic block profile) not supported");
5163 profile_block_flag
= (profile_block_flag
< 2) ? 1 : 3;
5166 else if (!strcmp (str
, "ax"))
5168 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
5169 warning ("`-ax' option (jump profiling) not supported");
5171 profile_block_flag
= (!profile_block_flag
5172 || profile_block_flag
== 2) ? 2 : 3;
5175 else if (str
[0] == 'g')
5178 /* A lot of code assumes write_symbols == NO_DEBUG if the
5179 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
5180 of what debugging type has been selected). This records the
5181 selected type. It is an error to specify more than one
5183 static enum debug_info_type selected_debug_type
= NO_DEBUG
;
5184 /* Non-zero if debugging format has been explicitly set.
5185 -g and -ggdb don't explicitly set the debugging format so
5186 -gdwarf -g3 is equivalent to -gdwarf3. */
5187 static int type_explicitly_set_p
= 0;
5188 /* Indexed by enum debug_info_type. */
5189 static const char *debug_type_names
[] =
5191 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
5194 /* The maximum admissible debug level value. */
5195 static const unsigned max_debug_level
= 3;
5197 /* Look up STR in the table. */
5198 for (da
= debug_args
; da
->arg
; da
++)
5200 const int da_len
= strlen (da
->arg
);
5202 if (! strncmp (str
, da
->arg
, da_len
))
5204 enum debug_info_type type
= da
->debug_type
;
5205 const char *p
= str
+ da_len
;
5207 if (*p
&& (*p
< '0' || *p
> '9'))
5210 /* A debug flag without a level defaults to level 2.
5211 Note we do not want to call read_integral_parameter
5212 for that case since it will call atoi which
5215 ??? We may want to generalize the interface to
5216 read_integral_parameter to better handle this case
5217 if this case shows up often. */
5219 level
= read_integral_parameter (p
, 0,
5220 max_debug_level
+ 1);
5224 if (da_len
> 1 && *p
&& !strncmp (str
, "gdwarf", da_len
))
5226 error ("use -gdwarf -g%d for DWARF v1, level %d",
5229 error ("use -gdwarf-2 for DWARF v2");
5232 if (level
> max_debug_level
)
5234 warning ("ignoring option `%s' due to invalid debug level specification",
5236 level
= debug_info_level
;
5239 if (type
== NO_DEBUG
)
5241 type
= PREFERRED_DEBUGGING_TYPE
;
5242 if (da_len
> 1 && strncmp (str
, "ggdb", da_len
) == 0)
5244 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
5245 type
= DWARF2_DEBUG
;
5247 #ifdef DBX_DEBUGGING_INFO
5254 if (type
== NO_DEBUG
)
5255 warning ("`-%s' not supported by this configuration of GCC",
5258 /* Does it conflict with an already selected type? */
5259 if (type_explicitly_set_p
5260 /* -g/-ggdb don't conflict with anything */
5261 && da
->debug_type
!= NO_DEBUG
5262 && type
!= selected_debug_type
)
5263 warning ("`-%s' ignored, conflicts with `-g%s'",
5264 str
, debug_type_names
[(int) selected_debug_type
]);
5267 /* If the format has already been set, -g/-ggdb
5268 only change the debug level. */
5269 if (type_explicitly_set_p
5270 && da
->debug_type
== NO_DEBUG
)
5271 ; /* don't change debugging type */
5274 selected_debug_type
= type
;
5275 type_explicitly_set_p
= da
->debug_type
!= NO_DEBUG
;
5277 write_symbols
= (level
== 0
5279 : selected_debug_type
);
5280 use_gnu_debug_info_extensions
= da
->use_extensions_p
;
5281 debug_info_level
= (enum debug_info_level
) level
;
5287 warning ("`-%s' not supported by this configuration of GCC",
5290 else if (!strcmp (str
, "o"))
5292 asm_file_name
= argv
[++i
];
5294 else if (str
[0] == 'G')
5296 const int g_switch_val
= (str
[1] != '\0') ?
5297 read_integral_parameter(str
+ 1, 0, -1) :
5298 read_integral_parameter(argv
[++i
], 0, -1);
5300 if (g_switch_val
!= -1)
5302 g_switch_set
= TRUE
;
5303 g_switch_value
= g_switch_val
;
5307 error("Invalid option `-%s'",str
);
5310 else if (!strncmp (str
, "aux-info", 8))
5312 flag_gen_aux_info
= 1;
5313 aux_info_file_name
= (str
[8] != '\0' ? str
+8 : argv
[++i
]);
5315 else if (!strcmp (str
, "-help"))
5321 error ("Invalid option `%s'", argv
[i
]);
5323 else if (argv
[i
][0] == '+')
5324 error ("Invalid option `%s'", argv
[i
]);
5329 /* Checker uses the frame pointer. */
5330 if (flag_check_memory_usage
)
5331 flag_omit_frame_pointer
= 0;
5335 /* Inlining does not work if not optimizing,
5336 so force it not to be done. */
5340 /* The c_decode_option and lang_decode_option functions set
5341 this to `2' if -Wall is used, so we can avoid giving out
5342 lots of errors for people who don't realize what -Wall does. */
5343 if (warn_uninitialized
== 1)
5344 warning ("-Wuninitialized is not supported without -O");
5347 #ifdef OVERRIDE_OPTIONS
5348 /* Some machines may reject certain combinations of options. */
5352 if (exceptions_via_longjmp
== 2)
5354 #ifdef DWARF2_UNWIND_INFO
5355 exceptions_via_longjmp
= ! DWARF2_UNWIND_INFO
;
5357 exceptions_via_longjmp
= 1;
5361 /* Set up the align_*_log variables, defaulting them to 1 if they
5362 were still unset. */
5363 if (align_loops
<= 0) align_loops
= 1;
5364 align_loops_log
= floor_log2 (align_loops
*2-1);
5365 if (align_jumps
<= 0) align_jumps
= 1;
5366 align_jumps_log
= floor_log2 (align_jumps
*2-1);
5367 if (align_labels
<= 0) align_labels
= 1;
5368 align_labels_log
= floor_log2 (align_labels
*2-1);
5369 if (align_functions
<= 0) align_functions
= 1;
5370 align_functions_log
= floor_log2 (align_functions
*2-1);
5372 if (profile_block_flag
== 3)
5374 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
5375 profile_block_flag
= 2;
5378 /* Unrolling all loops implies that standard loop unrolling must also
5380 if (flag_unroll_all_loops
)
5381 flag_unroll_loops
= 1;
5382 /* Loop unrolling requires that strength_reduction be on also. Silently
5383 turn on strength reduction here if it isn't already on. Also, the loop
5384 unrolling code assumes that cse will be run after loop, so that must
5385 be turned on also. */
5386 if (flag_unroll_loops
)
5388 flag_strength_reduce
= 1;
5389 flag_rerun_cse_after_loop
= 1;
5392 /* Warn about options that are not supported on this machine. */
5393 #ifndef INSN_SCHEDULING
5394 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
5395 warning ("instruction scheduling not supported on this target machine");
5398 if (flag_delayed_branch
)
5399 warning ("this target machine does not have delayed branches");
5402 user_label_prefix
= USER_LABEL_PREFIX
;
5403 if (flag_leading_underscore
!= -1)
5405 /* If the default prefix is more complicated than "" or "_",
5406 issue a warning and ignore this option. */
5407 if (user_label_prefix
[0] == 0 ||
5408 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
5410 user_label_prefix
= flag_leading_underscore
? "_" : "";
5413 warning ("-f%sleading-underscore not supported on this target machine",
5414 flag_leading_underscore
? "" : "no-");
5417 /* If we are in verbose mode, write out the version and maybe all the
5418 option flags in use. */
5421 print_version (stderr
, "");
5423 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
5426 compile_file (filename
);
5428 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
5431 char *lim
= (char *) sbrk (0);
5433 notice ("Data size %ld.\n", (long) (lim
- (char *) &environ
));
5438 system ("ps -l 1>&2");
5441 #endif /* not USG */
5444 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
5447 exit (FATAL_EXIT_CODE
);
5449 exit (FATAL_EXIT_CODE
);
5450 exit (SUCCESS_EXIT_CODE
);
5454 /* Decode -m switches. */
5455 /* Decode the switch -mNAME. */
5458 set_target_switch (name
)
5462 int valid_target_option
= 0;
5464 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
5465 if (!strcmp (target_switches
[j
].name
, name
))
5467 if (target_switches
[j
].value
< 0)
5468 target_flags
&= ~-target_switches
[j
].value
;
5470 target_flags
|= target_switches
[j
].value
;
5471 valid_target_option
= 1;
5474 #ifdef TARGET_OPTIONS
5475 if (!valid_target_option
)
5476 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
5478 int len
= strlen (target_options
[j
].prefix
);
5479 if (!strncmp (target_options
[j
].prefix
, name
, len
))
5481 *target_options
[j
].variable
= name
+ len
;
5482 valid_target_option
= 1;
5487 if (!valid_target_option
)
5488 error ("Invalid option `%s'", name
);
5491 /* Print version information to FILE.
5492 Each line begins with INDENT (for the case where FILE is the
5493 assembler output file). */
5496 print_version (file
, indent
)
5501 #define __VERSION__ "[?]"
5505 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
5507 "%s%s%s version %s (%s) compiled by CC.\n"
5509 , indent
, *indent
!= 0 ? " " : "",
5510 language_string
, version_string
, TARGET_NAME
, __VERSION__
);
5513 /* Print an option value and return the adjusted position in the line.
5514 ??? We don't handle error returns from fprintf (disk full); presumably
5515 other code will catch a disk full though. */
5518 print_single_switch (file
, pos
, max
, indent
, sep
, term
, type
, name
)
5521 const char *indent
, *sep
, *term
, *type
, *name
;
5523 /* The ultrix fprintf returns 0 on success, so compute the result we want
5524 here since we need it for the following test. */
5525 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
5530 fprintf (file
, "%s", term
);
5535 fprintf (file
, "%s", indent
);
5536 pos
= strlen (indent
);
5538 fprintf (file
, "%s%s%s", sep
, type
, name
);
5543 /* Print active target switches to FILE.
5544 POS is the current cursor position and MAX is the size of a "line".
5545 Each line begins with INDENT and ends with TERM.
5546 Each switch is separated from the next by SEP. */
5549 print_switch_values (file
, pos
, max
, indent
, sep
, term
)
5552 const char *indent
, *sep
, *term
;
5557 /* Print the options as passed. */
5559 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
5560 _("options passed: "), "");
5562 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
5566 if (strcmp (*p
, "-o") == 0)
5572 if (strcmp (*p
, "-quiet") == 0)
5574 if (strcmp (*p
, "-version") == 0)
5579 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
5582 fprintf (file
, "%s", term
);
5584 /* Print the -f and -m options that have been enabled.
5585 We don't handle language specific options but printing argv
5588 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
5589 _("options enabled: "), "");
5591 for (j
= 0; j
< sizeof f_options
/ sizeof f_options
[0]; j
++)
5592 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
5593 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5594 "-f", f_options
[j
].string
);
5596 /* Print target specific options. */
5598 for (j
= 0; j
< sizeof target_switches
/ sizeof target_switches
[0]; j
++)
5599 if (target_switches
[j
].name
[0] != '\0'
5600 && target_switches
[j
].value
> 0
5601 && ((target_switches
[j
].value
& target_flags
)
5602 == target_switches
[j
].value
))
5604 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5605 "-m", target_switches
[j
].name
);
5608 #ifdef TARGET_OPTIONS
5609 for (j
= 0; j
< sizeof target_options
/ sizeof target_options
[0]; j
++)
5610 if (*target_options
[j
].variable
!= NULL
)
5613 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
5614 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
5615 prefix
, *target_options
[j
].variable
);
5619 fprintf (file
, "%s", term
);
5622 /* Record the beginning of a new source file, named FILENAME. */
5625 debug_start_source_file (filename
)
5626 register char *filename ATTRIBUTE_UNUSED
;
5628 #ifdef DBX_DEBUGGING_INFO
5629 if (write_symbols
== DBX_DEBUG
)
5630 dbxout_start_new_source_file (filename
);
5632 #ifdef DWARF_DEBUGGING_INFO
5633 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5634 && write_symbols
== DWARF_DEBUG
)
5635 dwarfout_start_new_source_file (filename
);
5636 #endif /* DWARF_DEBUGGING_INFO */
5637 #ifdef DWARF2_DEBUGGING_INFO
5638 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5639 && write_symbols
== DWARF2_DEBUG
)
5640 dwarf2out_start_source_file (filename
);
5641 #endif /* DWARF2_DEBUGGING_INFO */
5642 #ifdef SDB_DEBUGGING_INFO
5643 if (write_symbols
== SDB_DEBUG
)
5644 sdbout_start_new_source_file (filename
);
5648 /* Record the resumption of a source file. LINENO is the line number in
5649 the source file we are returning to. */
5652 debug_end_source_file (lineno
)
5653 register unsigned lineno ATTRIBUTE_UNUSED
;
5655 #ifdef DBX_DEBUGGING_INFO
5656 if (write_symbols
== DBX_DEBUG
)
5657 dbxout_resume_previous_source_file ();
5659 #ifdef DWARF_DEBUGGING_INFO
5660 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5661 && write_symbols
== DWARF_DEBUG
)
5662 dwarfout_resume_previous_source_file (lineno
);
5663 #endif /* DWARF_DEBUGGING_INFO */
5664 #ifdef DWARF2_DEBUGGING_INFO
5665 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5666 && write_symbols
== DWARF2_DEBUG
)
5667 dwarf2out_end_source_file ();
5668 #endif /* DWARF2_DEBUGGING_INFO */
5669 #ifdef SDB_DEBUGGING_INFO
5670 if (write_symbols
== SDB_DEBUG
)
5671 sdbout_resume_previous_source_file ();
5675 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5676 the tail part of the directive line, i.e. the part which is past the
5677 initial whitespace, #, whitespace, directive-name, whitespace part. */
5680 debug_define (lineno
, buffer
)
5681 register unsigned lineno ATTRIBUTE_UNUSED
;
5682 register char *buffer ATTRIBUTE_UNUSED
;
5684 #ifdef DWARF_DEBUGGING_INFO
5685 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5686 && write_symbols
== DWARF_DEBUG
)
5687 dwarfout_define (lineno
, buffer
);
5688 #endif /* DWARF_DEBUGGING_INFO */
5689 #ifdef DWARF2_DEBUGGING_INFO
5690 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5691 && write_symbols
== DWARF2_DEBUG
)
5692 dwarf2out_define (lineno
, buffer
);
5693 #endif /* DWARF2_DEBUGGING_INFO */
5696 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5697 the tail part of the directive line, i.e. the part which is past the
5698 initial whitespace, #, whitespace, directive-name, whitespace part. */
5701 debug_undef (lineno
, buffer
)
5702 register unsigned lineno ATTRIBUTE_UNUSED
;
5703 register char *buffer ATTRIBUTE_UNUSED
;
5705 #ifdef DWARF_DEBUGGING_INFO
5706 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5707 && write_symbols
== DWARF_DEBUG
)
5708 dwarfout_undef (lineno
, buffer
);
5709 #endif /* DWARF_DEBUGGING_INFO */
5710 #ifdef DWARF2_DEBUGGING_INFO
5711 if (debug_info_level
== DINFO_LEVEL_VERBOSE
5712 && write_symbols
== DWARF2_DEBUG
)
5713 dwarf2out_undef (lineno
, buffer
);
5714 #endif /* DWARF2_DEBUGGING_INFO */