1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
34 #ifdef HAVE_SYS_RESOURCE_H
35 # include <sys/resource.h>
38 #ifdef HAVE_SYS_TIMES_H
39 # include <sys/times.h>
47 #include "insn-attr.h"
48 #include "insn-codes.h"
49 #include "insn-config.h"
50 #include "hard-reg-set.h"
58 #include "basic-block.h"
65 #include "diagnostic.h"
68 #ifndef ACCUMULATE_OUTGOING_ARGS
69 #define ACCUMULATE_OUTGOING_ARGS 0
72 #ifdef DWARF_DEBUGGING_INFO
76 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
77 #include "dwarf2out.h"
80 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
84 #ifdef SDB_DEBUGGING_INFO
88 #ifdef XCOFF_DEBUGGING_INFO
93 /* The extra parameters substantially improve the I/O performance. */
96 vms_fopen (fname, type)
100 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
101 fixed arguments, which matches ANSI's specification but not VAXCRTL's
102 pre-ANSI implementation. This hack circumvents the mismatch problem. */
103 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
106 return (*vmslib_fopen) (fname, type, "mbc=32",
107 "deq=64", "fop=tef", "shr=nil");
109 return (*vmslib_fopen) (fname, type, "mbc=32");
112 #define fopen vms_fopen
115 #ifndef DEFAULT_GDB_EXTENSIONS
116 #define DEFAULT_GDB_EXTENSIONS 1
119 /* If more than one debugging type is supported, you must define
120 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
122 This is one long line cause VAXC can't handle a \-newline. */
123 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
124 #ifndef PREFERRED_DEBUGGING_TYPE
125 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
126 #endif /* no PREFERRED_DEBUGGING_TYPE */
127 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
128 so the following code needn't care. */
129 #ifdef DBX_DEBUGGING_INFO
130 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
132 #ifdef SDB_DEBUGGING_INFO
133 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
135 #ifdef DWARF_DEBUGGING_INFO
136 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
138 #ifdef DWARF2_DEBUGGING_INFO
139 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
141 #ifdef XCOFF_DEBUGGING_INFO
142 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
144 #endif /* More than one debugger format enabled. */
146 /* If still not defined, must have been because no debugging formats
148 #ifndef PREFERRED_DEBUGGING_TYPE
149 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
152 #if defined (HAVE_DECL_ENVIRON) && !HAVE_DECL_ENVIRON
153 extern char **environ;
156 /* Carry information from ASM_DECLARE_OBJECT_NAME
157 to ASM_FINISH_DECLARE_OBJECT. */
159 extern int size_directive_output;
160 extern tree last_assemble_variable_decl;
162 static void set_target_switch PARAMS ((const char *));
163 static const char *decl_name PARAMS ((tree, int));
165 static void float_signal PARAMS ((int)) ATTRIBUTE_NORETURN;
166 static void crash_signal PARAMS ((int)) ATTRIBUTE_NORETURN;
167 #ifdef ASM_IDENTIFY_LANGUAGE
168 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
169 static void output_lang_identify PARAMS ((FILE *)) ATTRIBUTE_UNUSED;
171 static void compile_file PARAMS ((const char *));
172 static void display_help PARAMS ((void));
173 static void mark_file_stack PARAMS ((void *));
175 static void decode_d_option PARAMS ((const char *));
176 static int decode_f_option PARAMS ((const char *));
177 static int decode_W_option PARAMS ((const char *));
178 static int decode_g_option PARAMS ((const char *));
179 static unsigned int independent_decode_option PARAMS ((int, char **));
181 static void print_version PARAMS ((FILE *, const char *));
182 static int print_single_switch PARAMS ((FILE *, int, int, const char *,
183 const char *, const char *,
184 const char *, const char *));
185 static void print_switch_values PARAMS ((FILE *, int, int, const char *,
186 const char *, const char *));
188 /* Length of line when printing switch values. */
191 /* Name of program invoked, sans directories. */
193 const char *progname;
195 /* Copy of arguments to main. */
199 /* Name of current original source file (what was input to cpp).
200 This comes from each #-command in the actual input. */
202 const char *input_filename;
204 /* Name of top-level original source file (what was input to cpp).
205 This comes from the #-command at the beginning of the actual input.
206 If there isn't any there, then this is the cc1 input file name. */
208 const char *main_input_filename;
210 /* Current line number in real source file. */
214 /* Nonzero if it is unsafe to create any new pseudo registers. */
217 /* Stack of currently pending input files. */
219 struct file_stack *input_file_stack;
221 /* Incremented on each change to input_file_stack. */
222 int input_file_stack_tick;
224 /* Name to use as base of names for dump output files. */
226 const char *dump_base_name;
228 /* Bit flags that specify the machine subtype we are compiling for.
229 Bits are tested using macros TARGET_... defined in the tm.h file
230 and set by `-m...' switches. Must be defined in rtlanal.c. */
232 extern int target_flags;
234 /* Describes a dump file. */
236 struct dump_file_info
238 /* The unique extension to apply, e.g. ".jump". */
239 const char *const extension;
241 /* The -d<c> character that enables this dump file. */
242 char const debug_switch;
244 /* True if there is a corresponding graph dump file. */
245 char const graph_dump_p;
247 /* True if the user selected this dump. */
250 /* True if the files have been initialized (ie truncated). */
254 /* Enumerate the extant dump files. */
291 /* Describes all the dump files. Should be kept in order of the
292 pass and in sync with dump_file_index above.
294 Remaining -d letters:
300 struct dump_file_info dump_file[DFI_MAX] =
302 { "rtl", 'r', 0, 0, 0 },
303 { "sibling", 'i', 0, 0, 0 },
304 { "jump", 'j', 0, 0, 0 },
305 { "cse", 's', 0, 0, 0 },
306 { "addressof", 'F', 0, 0, 0 },
307 { "ssa", 'e', 1, 0, 0 },
308 { "dce", 'X', 1, 0, 0 },
309 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
310 { "gcse", 'G', 1, 0, 0 },
311 { "loop", 'L', 1, 0, 0 },
312 { "cse2", 't', 1, 0, 0 },
313 { "cfg", 'f', 1, 0, 0 },
314 { "bp", 'b', 1, 0, 0 },
315 { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
316 { "combine", 'c', 1, 0, 0 },
317 { "ce", 'C', 1, 0, 0 },
318 { "regmove", 'N', 1, 0, 0 },
319 { "sched", 'S', 1, 0, 0 },
320 { "lreg", 'l', 1, 0, 0 },
321 { "greg", 'g', 1, 0, 0 },
322 { "flow2", 'w', 1, 0, 0 },
323 { "ce2", 'E', 1, 0, 0 },
324 { "peephole2", 'z', 1, 0, 0 },
325 { "rnreg", 'n', 1, 0, 0 },
326 { "sched2", 'R', 1, 0, 0 },
327 { "bbro", 'B', 1, 0, 0 },
328 { "jump2", 'J', 1, 0, 0 },
329 { "mach", 'M', 1, 0, 0 },
330 { "dbr", 'd', 0, 0, 0 },
331 { "stack", 'k', 1, 0, 0 },
334 static int open_dump_file PARAMS ((enum dump_file_index, tree));
335 static void close_dump_file PARAMS ((enum dump_file_index,
336 void (*) (FILE *, rtx), rtx));
338 /* Other flags saying which kinds of debugging dump have been requested. */
340 int rtl_dump_and_exit;
341 int flag_print_asm_name;
342 static int flag_print_mem;
343 static int version_flag;
344 static char *filename;
345 enum graph_dump_types graph_dump_format;
347 /* Name for output file of assembly code, specified with -o. */
351 /* Value of the -G xx switch, and whether it was passed or not. */
355 /* Type(s) of debugging information we are producing (if any).
356 See flags.h for the definitions of the different possible
357 types of debugging information. */
358 enum debug_info_type write_symbols = NO_DEBUG;
360 /* Level of debugging information we are producing. See flags.h
361 for the definitions of the different possible levels. */
362 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
364 /* Nonzero means use GNU-only extensions in the generated symbolic
365 debugging information. */
366 /* Currently, this only has an effect when write_symbols is set to
367 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
368 int use_gnu_debug_info_extensions = 0;
370 /* Nonzero means do optimizations. -O.
371 Particular numeric values stand for particular amounts of optimization;
372 thus, -O2 stores 2 here. However, the optimizations beyond the basic
373 ones are not controlled directly by this variable. Instead, they are
374 controlled by individual `flag_...' variables that are defaulted
375 based on this variable. */
379 /* Nonzero means optimize for size. -Os.
380 The only valid values are zero and non-zero. When optimize_size is
381 non-zero, optimize defaults to 2, but certain individual code
382 bloating optimizations are disabled. */
384 int optimize_size = 0;
386 /* Number of error messages and warning messages so far. */
389 int warningcount = 0;
392 /* The FUNCTION_DECL for the function currently being compiled,
393 or 0 if between functions. */
394 tree current_function_decl;
396 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
398 tree current_function_func_begin_label;
400 /* Pointer to function to compute the name to use to print a declaration.
401 DECL is the declaration in question.
402 VERBOSITY determines what information will be printed:
403 0: DECL_NAME, demangled as necessary.
404 1: and scope information.
405 2: and any other information that might be interesting, such as function
406 parameter types in C++. */
408 const char *(*decl_printable_name) PARAMS ((tree, int));
410 /* Pointer to function to compute rtl for a language-specific tree code. */
412 typedef rtx (*lang_expand_expr_t)
413 PARAMS ((union tree_node *, rtx, enum machine_mode,
414 enum expand_modifier modifier));
416 lang_expand_expr_t lang_expand_expr = 0;
418 tree (*lang_expand_constant) PARAMS ((tree)) = 0;
420 /* Pointer to function to finish handling an incomplete decl at the
421 end of compilation. */
423 void (*incomplete_decl_finalize_hook) PARAMS ((tree)) = 0;
425 /* Nonzero if generating code to do profiling. */
427 int profile_flag = 0;
429 /* Nonzero if generating code to do profiling on a line-by-line basis. */
431 int profile_block_flag;
433 /* Nonzero if generating code to profile program flow graph arcs. */
435 int profile_arc_flag = 0;
437 /* Nonzero if generating info for gcov to calculate line test coverage. */
439 int flag_test_coverage = 0;
441 /* Nonzero indicates that branch taken probabilities should be calculated. */
443 int flag_branch_probabilities = 0;
445 /* Nonzero if basic blocks should be reordered. */
447 int flag_reorder_blocks = 0;
449 /* Nonzero if registers should be renamed. */
451 int flag_rename_registers = 0;
453 /* Nonzero for -pedantic switch: warn about anything
454 that standard spec forbids. */
458 /* Temporarily suppress certain warnings.
459 This is set while reading code from a system header file. */
461 int in_system_header = 0;
463 /* Don't print functions as they are compiled and don't print
464 times taken by the various passes. -quiet. */
470 /* Nonzero means `char' should be signed. */
472 int flag_signed_char;
474 /* Nonzero means give an enum type only as many bytes as it needs. */
476 int flag_short_enums;
478 /* Nonzero for -fcaller-saves: allocate values in regs that need to
479 be saved across function calls, if that produces overall better code.
480 Optional now, so people can test it. */
482 #ifdef DEFAULT_CALLER_SAVES
483 int flag_caller_saves = 1;
485 int flag_caller_saves = 0;
488 /* Nonzero if structures and unions should be returned in memory.
490 This should only be defined if compatibility with another compiler or
491 with an ABI is needed, because it results in slower code. */
493 #ifndef DEFAULT_PCC_STRUCT_RETURN
494 #define DEFAULT_PCC_STRUCT_RETURN 1
497 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
499 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
501 /* Nonzero for -fforce-mem: load memory value into a register
502 before arithmetic on it. This makes better cse but slower compilation. */
504 int flag_force_mem = 0;
506 /* Nonzero for -fforce-addr: load memory address into a register before
507 reference to memory. This makes better cse but slower compilation. */
509 int flag_force_addr = 0;
511 /* Nonzero for -fdefer-pop: don't pop args after each function call;
512 instead save them up to pop many calls' args with one insns. */
514 int flag_defer_pop = 0;
516 /* Nonzero for -ffloat-store: don't allocate floats and doubles
517 in extended-precision registers. */
519 int flag_float_store = 0;
521 /* Nonzero for -fcse-follow-jumps:
522 have cse follow jumps to do a more extensive job. */
524 int flag_cse_follow_jumps;
526 /* Nonzero for -fcse-skip-blocks:
527 have cse follow a branch around a block. */
528 int flag_cse_skip_blocks;
530 /* Nonzero for -fexpensive-optimizations:
531 perform miscellaneous relatively-expensive optimizations. */
532 int flag_expensive_optimizations;
534 /* Nonzero for -fthread-jumps:
535 have jump optimize output of loop. */
537 int flag_thread_jumps;
539 /* Nonzero enables strength-reduction in loop.c. */
541 int flag_strength_reduce = 0;
543 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
544 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
545 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
548 int flag_unroll_loops;
550 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
551 This is generally not a win. */
553 int flag_unroll_all_loops;
555 /* Nonzero forces all invariant computations in loops to be moved
558 int flag_move_all_movables = 0;
560 /* Nonzero forces all general induction variables in loops to be
563 int flag_reduce_all_givs = 0;
565 /* Nonzero to perform full register move optimization passes. This is the
568 int flag_regmove = 0;
570 /* Nonzero for -fwritable-strings:
571 store string constants in data segment and don't uniquize them. */
573 int flag_writable_strings = 0;
575 /* Nonzero means don't put addresses of constant functions in registers.
576 Used for compiling the Unix kernel, where strange substitutions are
577 done on the assembly output. */
579 int flag_no_function_cse = 0;
581 /* Nonzero for -fomit-frame-pointer:
582 don't make a frame pointer in simple functions that don't require one. */
584 int flag_omit_frame_pointer = 0;
586 /* Nonzero means place each function into its own section on those platforms
587 which support arbitrary section names and unlimited numbers of sections. */
589 int flag_function_sections = 0;
591 /* ... and similar for data. */
593 int flag_data_sections = 0;
595 /* Nonzero to inhibit use of define_optimization peephole opts. */
597 int flag_no_peephole = 0;
599 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
600 operations in the interest of optimization. For example it allows
601 GCC to assume arguments to sqrt are nonnegative numbers, allowing
602 faster code for sqrt to be generated. */
604 int flag_fast_math = 0;
606 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
608 int flag_optimize_sibling_calls = 0;
610 /* Nonzero means the front end generally wants `errno' maintained by math
611 operations, like built-in SQRT, unless overridden by flag_fast_math. */
613 int flag_errno_math = 1;
615 /* 0 means straightforward implementation of complex divide acceptable.
616 1 means wide ranges of inputs must work for complex divide.
617 2 means C9X-like requirements for complex divide (not yet implemented). */
619 int flag_complex_divide_method = 0;
621 /* Nonzero means all references through pointers are volatile. */
625 /* Nonzero means treat all global and extern variables as volatile. */
627 int flag_volatile_global;
629 /* Nonzero means treat all static variables as volatile. */
631 int flag_volatile_static;
633 /* Nonzero means just do syntax checking; don't output anything. */
635 int flag_syntax_only = 0;
637 /* Nonzero means perform global cse. */
639 static int flag_gcse;
641 /* Nonzero means to use global dataflow analysis to eliminate
642 useless null pointer tests. */
644 static int flag_delete_null_pointer_checks;
646 /* Nonzero means to rerun cse after loop optimization. This increases
647 compilation time about 20% and picks up a few more common expressions. */
649 static int flag_rerun_cse_after_loop;
651 /* Nonzero means to run loop optimizations twice. */
653 int flag_rerun_loop_opt;
655 /* Nonzero for -finline-functions: ok to inline functions that look like
656 good inline candidates. */
658 int flag_inline_functions;
660 /* Nonzero for -fkeep-inline-functions: even if we make a function
661 go inline everywhere, keep its definition around for debugging
664 int flag_keep_inline_functions;
666 /* Nonzero means that functions will not be inlined. */
670 /* Nonzero means that we should emit static const variables
671 regardless of whether or not optimization is turned on. */
673 int flag_keep_static_consts = 1;
675 /* Nonzero means we should be saving declaration info into a .X file. */
677 int flag_gen_aux_info = 0;
679 /* Specified name of aux-info file. */
681 static char *aux_info_file_name;
683 /* Nonzero means make the text shared if supported. */
685 int flag_shared_data;
687 /* Nonzero means schedule into delayed branch slots if supported. */
689 int flag_delayed_branch;
691 /* Nonzero if we are compiling pure (sharable) code.
692 Value is 1 if we are doing reasonable (i.e. simple
693 offset into offset table) pic. Value is 2 if we can
694 only perform register offsets. */
698 /* Nonzero means generate extra code for exception handling and enable
699 exception handling. */
703 /* Nonzero means use the new model for exception handling. Replaces
704 -DNEW_EH_MODEL as a compile option. */
706 int flag_new_exceptions = 1;
708 /* Nonzero means generate frame unwind info table when supported. */
710 int flag_unwind_tables = 0;
712 /* Nonzero means don't place uninitialized global data in common storage
717 /* Nonzero means pretend it is OK to examine bits of target floats,
718 even if that isn't true. The resulting code will have incorrect constants,
719 but the same series of instructions that the native compiler would make. */
721 int flag_pretend_float;
723 /* Nonzero means change certain warnings into errors.
724 Usually these are warnings about failure to conform to some standard. */
726 int flag_pedantic_errors = 0;
728 /* flag_schedule_insns means schedule insns within basic blocks (before
730 flag_schedule_insns_after_reload means schedule insns after
733 int flag_schedule_insns = 0;
734 int flag_schedule_insns_after_reload = 0;
736 /* The following flags have effect only for scheduling before register
739 flag_schedule_interblock means schedule insns accross basic blocks.
740 flag_schedule_speculative means allow speculative motion of non-load insns.
741 flag_schedule_speculative_load means allow speculative motion of some
743 flag_schedule_speculative_load_dangerous allows speculative motion of more
746 int flag_schedule_interblock = 1;
747 int flag_schedule_speculative = 1;
748 int flag_schedule_speculative_load = 0;
749 int flag_schedule_speculative_load_dangerous = 0;
751 int flag_single_precision_constant;
753 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
754 by a cheaper branch on a count register. */
755 int flag_branch_on_count_reg = 1;
757 /* -finhibit-size-directive inhibits output of .size for ELF.
758 This is used only for compiling crtstuff.c,
759 and it may be extended to other effects
760 needed for crtstuff.c on other systems. */
761 int flag_inhibit_size_directive = 0;
763 /* -fverbose-asm causes extra commentary information to be produced in
764 the generated assembly code (to make it more readable). This option
765 is generally only of use to those who actually need to read the
766 generated assembly code (perhaps while debugging the compiler itself).
767 -fno-verbose-asm, the default, causes the extra information
768 to be omitted and is useful when comparing two assembler files. */
770 int flag_verbose_asm = 0;
772 /* -dA causes debug commentary information to be produced in
773 the generated assembly code (to make it more readable). This option
774 is generally only of use to those who actually need to read the
775 generated assembly code (perhaps while debugging the compiler itself).
776 Currently, this switch is only used by dwarfout.c; however, it is intended
777 to be a catchall for printing debug information in the assembler file. */
779 int flag_debug_asm = 0;
781 /* -fgnu-linker specifies use of the GNU linker for initializations.
782 (Or, more generally, a linker that handles initializations.)
783 -fno-gnu-linker says that collect2 will be used. */
785 int flag_gnu_linker = 0;
787 int flag_gnu_linker = 1;
793 /* Enable dead code elimination. */
796 /* Tag all structures with __attribute__(packed). */
797 int flag_pack_struct = 0;
799 /* Emit code to check for stack overflow; also may cause large objects
800 to be allocated dynamically. */
801 int flag_stack_check;
803 /* When non-NULL, indicates that whenever space is allocated on the
804 stack, the resulting stack pointer must not pass this
805 address---that is, for stacks that grow downward, the stack pointer
806 must always be greater than or equal to this address; for stacks
807 that grow upward, the stack pointer must be less than this address.
808 At present, the rtx may be either a REG or a SYMBOL_REF, although
809 the support provided depends on the backend. */
812 /* -fcheck-memory-usage causes extra code to be generated in order to check
813 memory accesses. This is used by a detector of bad memory accesses such
815 int flag_check_memory_usage = 0;
817 /* -fprefix-function-name causes function name to be prefixed. This
818 can be used with -fcheck-memory-usage to isolate code compiled with
819 -fcheck-memory-usage. */
820 int flag_prefix_function_name = 0;
822 /* 0 if pointer arguments may alias each other. True in C.
823 1 if pointer arguments may not alias each other but may alias
825 2 if pointer arguments may not alias each other and may not
826 alias global variables. True in Fortran.
827 This defaults to 0 for C. */
828 int flag_argument_noalias = 0;
830 /* Nonzero if we should do (language-dependent) alias analysis.
831 Typically, this analysis will assume that expressions of certain
832 types do not alias expressions of certain other types. Only used
833 if alias analysis (in general) is enabled. */
834 int flag_strict_aliasing = 0;
836 /* Instrument functions with calls at entry and exit, for profiling. */
837 int flag_instrument_function_entry_exit = 0;
839 /* Nonzero means ignore `#ident' directives. 0 means handle them.
840 On SVR4 targets, it also controls whether or not to emit a
841 string identifying the compiler. */
843 int flag_no_ident = 0;
845 /* This will perform a peephole pass before sched2. */
846 int flag_peephole2 = 0;
848 /* -fbounded-pointers causes gcc to compile pointers as composite
849 objects occupying three words: the pointer value, the base address
850 of the referent object, and the address immediately beyond the end
851 of the referent object. The base and extent allow us to perform
852 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
853 int flag_bounded_pointers = 0;
855 /* -fcheck-bounds causes gcc to generate array bounds checks.
856 For C, C++: defaults to value of flag_bounded_pointers.
857 For ObjC: defaults to off.
858 For Java: defaults to on.
859 For Fortran: defaults to off.
860 For CHILL: defaults to off. */
861 int flag_bounds_check = 0;
863 /* If one, renumber instruction UIDs to reduce the number of
864 unused UIDs if there are a lot of instructions. If greater than
865 one, unconditionally renumber instruction UIDs. */
866 int flag_renumber_insns = 1;
868 /* Values of the -falign-* flags: how much to align labels in code.
869 0 means `use default', 1 means `don't align'.
870 For each variable, there is an _log variant which is the power
871 of two not less than the variable, for .align output. */
878 int align_labels_log;
880 int align_functions_log;
882 /* Table of supported debugging formats. */
886 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
887 constant expression, we use NO_DEBUG in its place. */
888 enum debug_info_type debug_type;
889 int use_extensions_p;
890 const char *description;
894 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
895 "Generate default debug format output" },
896 { "gdb", NO_DEBUG, 1, "Generate default extended debug format output" },
897 #ifdef DBX_DEBUGGING_INFO
898 { "stabs", DBX_DEBUG, 0, "Generate STABS format debug output" },
899 { "stabs+", DBX_DEBUG, 1, "Generate extended STABS format debug output" },
901 #ifdef DWARF_DEBUGGING_INFO
902 { "dwarf", DWARF_DEBUG, 0, "Generate DWARF-1 format debug output"},
903 { "dwarf+", DWARF_DEBUG, 1,
904 "Generated extended DWARF-1 format debug output" },
906 #ifdef DWARF2_DEBUGGING_INFO
907 { "dwarf-2", DWARF2_DEBUG, 0, "Enable DWARF-2 debug output" },
909 #ifdef XCOFF_DEBUGGING_INFO
910 { "xcoff", XCOFF_DEBUG, 0, "Generate XCOFF format debug output" },
911 { "xcoff+", XCOFF_DEBUG, 1, "Generate extended XCOFF format debug output" },
913 #ifdef SDB_DEBUGGING_INFO
914 { "coff", SDB_DEBUG, 0, "Generate COFF format debug output" },
924 const char *description;
926 lang_independent_options;
928 /* Add or remove a leading underscore from user symbols. */
929 int flag_leading_underscore = -1;
931 /* The user symbol prefix after having resolved same. */
932 const char *user_label_prefix;
934 /* A default for same. */
935 #ifndef USER_LABEL_PREFIX
936 #define USER_LABEL_PREFIX ""
939 /* Table of language-independent -f options.
940 STRING is the option name. VARIABLE is the address of the variable.
941 ON_VALUE is the value to store in VARIABLE
942 if `-fSTRING' is seen as an option.
943 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
945 lang_independent_options f_options[] =
947 {"float-store", &flag_float_store, 1,
948 "Do not store floats in registers" },
949 {"volatile", &flag_volatile, 1,
950 "Consider all mem refs through pointers as volatile"},
951 {"volatile-global", &flag_volatile_global, 1,
952 "Consider all mem refs to global data to be volatile" },
953 {"volatile-static", &flag_volatile_static, 1,
954 "Consider all mem refs to static data to be volatile" },
955 {"defer-pop", &flag_defer_pop, 1,
956 "Defer popping functions args from stack until later" },
957 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
958 "When possible do not generate stack frames"},
959 {"optimize-sibling-calls", &flag_optimize_sibling_calls, 1,
960 "Optimize sibling and tail recursive calls" },
961 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
962 "When running CSE, follow jumps to their targets" },
963 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
964 "When running CSE, follow conditional jumps" },
965 {"expensive-optimizations", &flag_expensive_optimizations, 1,
966 "Perform a number of minor, expensive optimisations" },
967 {"thread-jumps", &flag_thread_jumps, 1,
968 "Perform jump threading optimisations"},
969 {"strength-reduce", &flag_strength_reduce, 1,
970 "Perform strength reduction optimisations" },
971 {"unroll-loops", &flag_unroll_loops, 1,
972 "Perform loop unrolling when iteration count is known" },
973 {"unroll-all-loops", &flag_unroll_all_loops, 1,
974 "Perform loop unrolling for all loops" },
975 {"move-all-movables", &flag_move_all_movables, 1,
976 "Force all loop invariant computations out of loops" },
977 {"reduce-all-givs", &flag_reduce_all_givs, 1,
978 "Strength reduce all loop general induction variables" },
979 {"writable-strings", &flag_writable_strings, 1,
980 "Store strings in writable data section" },
981 {"peephole", &flag_no_peephole, 0,
982 "Enable machine specific peephole optimisations" },
983 {"force-mem", &flag_force_mem, 1,
984 "Copy memory operands into registers before using" },
985 {"force-addr", &flag_force_addr, 1,
986 "Copy memory address constants into regs before using" },
987 {"function-cse", &flag_no_function_cse, 0,
988 "Allow function addresses to be held in registers" },
989 {"inline-functions", &flag_inline_functions, 1,
990 "Integrate simple functions into their callers" },
991 {"keep-inline-functions", &flag_keep_inline_functions, 1,
992 "Generate code for funcs even if they are fully inlined" },
993 {"inline", &flag_no_inline, 0,
994 "Pay attention to the 'inline' keyword"},
995 {"keep-static-consts", &flag_keep_static_consts, 1,
996 "Emit static const variables even if they are not used" },
997 {"syntax-only", &flag_syntax_only, 1,
998 "Check for syntax errors, then stop" },
999 {"shared-data", &flag_shared_data, 1,
1000 "Mark data as shared rather than private" },
1001 {"caller-saves", &flag_caller_saves, 1,
1002 "Enable saving registers around function calls" },
1003 {"pcc-struct-return", &flag_pcc_struct_return, 1,
1004 "Return 'short' aggregates in memory, not registers" },
1005 {"reg-struct-return", &flag_pcc_struct_return, 0,
1006 "Return 'short' aggregates in registers" },
1007 {"delayed-branch", &flag_delayed_branch, 1,
1008 "Attempt to fill delay slots of branch instructions" },
1009 {"gcse", &flag_gcse, 1,
1010 "Perform the global common subexpression elimination" },
1011 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
1012 "Run CSE pass after loop optimisations"},
1013 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
1014 "Run the loop optimiser twice"},
1015 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
1016 "Delete useless null pointer checks" },
1017 {"pretend-float", &flag_pretend_float, 1,
1018 "Pretend that host and target use the same FP format"},
1019 {"schedule-insns", &flag_schedule_insns, 1,
1020 "Reschedule instructions to avoid pipeline stalls"},
1021 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
1022 "Run two passes of the instruction scheduler"},
1023 {"sched-interblock",&flag_schedule_interblock, 1,
1024 "Enable scheduling across basic blocks" },
1025 {"sched-spec",&flag_schedule_speculative, 1,
1026 "Allow speculative motion of non-loads" },
1027 {"sched-spec-load",&flag_schedule_speculative_load, 1,
1028 "Allow speculative motion of some loads" },
1029 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
1030 "Allow speculative motion of more loads" },
1031 {"branch-count-reg",&flag_branch_on_count_reg, 1,
1032 "Replace add,compare,branch with branch on count reg"},
1033 {"pic", &flag_pic, 1,
1034 "Generate position independent code, if possible"},
1035 {"PIC", &flag_pic, 2, ""},
1036 {"exceptions", &flag_exceptions, 1,
1037 "Enable exception handling" },
1038 {"new-exceptions", &flag_new_exceptions, 1,
1039 "Use the new model for exception handling" },
1040 {"unwind-tables", &flag_unwind_tables, 1,
1041 "Just generate unwind tables for exception handling" },
1042 {"sjlj-exceptions", &exceptions_via_longjmp, 1,
1043 "Use setjmp/longjmp to handle exceptions" },
1044 {"asynchronous-exceptions", &asynchronous_exceptions, 1,
1045 "Support asynchronous exceptions" },
1046 {"profile-arcs", &profile_arc_flag, 1,
1047 "Insert arc based program profiling code" },
1048 {"test-coverage", &flag_test_coverage, 1,
1049 "Create data files needed by gcov" },
1050 {"branch-probabilities", &flag_branch_probabilities, 1,
1051 "Use profiling information for branch probabilities" },
1052 {"reorder-blocks", &flag_reorder_blocks, 1,
1053 "Reorder basic blocks to improve code placement" },
1054 {"rename-registers", &flag_rename_registers, 1,
1055 "Do the register renaming optimization pass"},
1056 {"fast-math", &flag_fast_math, 1,
1057 "Improve FP speed by violating ANSI & IEEE rules" },
1058 {"common", &flag_no_common, 0,
1059 "Do not put unitialised globals in the common section" },
1060 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
1061 "Do not generate .size directives" },
1062 {"function-sections", &flag_function_sections, 1,
1063 "place each function into its own section" },
1064 {"data-sections", &flag_data_sections, 1,
1065 "place data items into their own section" },
1066 {"verbose-asm", &flag_verbose_asm, 1,
1067 "Add extra commentry to assembler output"},
1068 {"gnu-linker", &flag_gnu_linker, 1,
1069 "Output GNU ld formatted global initialisers"},
1070 {"regmove", &flag_regmove, 1,
1071 "Enables a register move optimisation"},
1072 {"optimize-register-move", &flag_regmove, 1,
1073 "Do the full regmove optimization pass"},
1074 {"pack-struct", &flag_pack_struct, 1,
1075 "Pack structure members together without holes" },
1076 {"stack-check", &flag_stack_check, 1,
1077 "Insert stack checking code into the program" },
1078 {"argument-alias", &flag_argument_noalias, 0,
1079 "Specify that arguments may alias each other & globals"},
1080 {"argument-noalias", &flag_argument_noalias, 1,
1081 "Assume arguments may alias globals but not each other"},
1082 {"argument-noalias-global", &flag_argument_noalias, 2,
1083 "Assume arguments do not alias each other or globals" },
1084 {"strict-aliasing", &flag_strict_aliasing, 1,
1085 "Assume strict aliasing rules apply" },
1086 {"align-loops", &align_loops, 0,
1087 "Align the start of loops" },
1088 {"align-jumps", &align_jumps, 0,
1089 "Align labels which are only reached by jumping" },
1090 {"align-labels", &align_labels, 0,
1091 "Align all labels" },
1092 {"align-functions", &align_functions, 0,
1093 "Align the start of functions" },
1094 {"check-memory-usage", &flag_check_memory_usage, 1,
1095 "Generate code to check every memory access" },
1096 {"prefix-function-name", &flag_prefix_function_name, 1,
1097 "Add a prefix to all function names" },
1098 {"dump-unnumbered", &flag_dump_unnumbered, 1,
1099 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1100 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
1101 "Instrument function entry/exit with profiling calls"},
1102 {"ssa", &flag_ssa, 1,
1103 "Enable SSA optimizations" },
1104 {"dce", &flag_dce, 1,
1105 "Enable dead code elimination" },
1106 {"leading-underscore", &flag_leading_underscore, 1,
1107 "External symbols have a leading underscore" },
1108 {"ident", &flag_no_ident, 0,
1109 "Process #ident directives"},
1110 { "peephole2", &flag_peephole2, 1,
1111 "Enables an rtl peephole pass run before sched2" },
1112 {"math-errno", &flag_errno_math, 1,
1113 "Set errno after built-in math functions"},
1114 {"bounded-pointers", &flag_bounded_pointers, 1,
1115 "Compile pointers as triples: value, base & end" },
1116 {"bounds-check", &flag_bounds_check, 1,
1117 "Generate code to check bounds before dereferencing pointers and arrays" },
1118 {"single-precision-constant", &flag_single_precision_constant, 1,
1119 "Convert floating point constant to single precision constant"}
1122 /* Table of language-specific options. */
1124 static struct lang_opt
1127 const char *description;
1129 documented_lang_options[] =
1131 /* In order not to overload the --help output, the convention
1132 used here is to only describe those options which are not
1133 enabled by default. */
1135 { "-ansi", "Compile just for ISO C89" },
1136 { "-fallow-single-precision",
1137 "Do not promote floats to double if using -traditional" },
1138 { "-std= ", "Determine language standard"},
1140 { "-fsigned-bitfields", "" },
1141 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1142 { "-fno-signed-bitfields", "" },
1143 { "-fno-unsigned-bitfields","" },
1144 { "-fsigned-char", "Make 'char' be signed by default"},
1145 { "-funsigned-char", "Make 'char' be unsigned by default"},
1146 { "-fno-signed-char", "" },
1147 { "-fno-unsigned-char", "" },
1149 { "-ftraditional", "" },
1150 { "-traditional", "Attempt to support traditional K&R style C"},
1151 { "-fnotraditional", "" },
1152 { "-fno-traditional", "" },
1155 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1156 { "-fbuiltin", "" },
1157 { "-fno-builtin", "Do not recognise any built in functions" },
1158 { "-fhosted", "Assume normal C execution environment" },
1159 { "-fno-hosted", "" },
1161 "Assume that standard libraries & main might not exist" },
1162 { "-fno-freestanding", "" },
1163 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1164 { "-fno-cond-mismatch", "" },
1165 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1166 { "-fno-dollars-in-identifiers", "" },
1167 { "-fpreprocessed", "" },
1168 { "-fno-preprocessed", "" },
1169 { "-fshort-double", "Use the same size for double as for float" },
1170 { "-fno-short-double", "" },
1171 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1172 { "-fno-short-enums", "" },
1173 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1174 { "-fno-short-wchar", "" },
1176 { "-Wall", "Enable most warning messages" },
1177 { "-Wbad-function-cast",
1178 "Warn about casting functions to incompatible types" },
1179 { "-Wno-bad-function-cast", "" },
1180 { "-Wmissing-noreturn",
1181 "Warn about functions which might be candidates for attribute noreturn" },
1182 { "-Wno-missing-noreturn", "" },
1183 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1184 { "-Wno-cast-qual", "" },
1185 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1186 { "-Wno-char-subscripts", "" },
1187 { "-Wcomment", "Warn if nested comments are detected" },
1188 { "-Wno-comment", "" },
1189 { "-Wcomments", "Warn if nested comments are detected" },
1190 { "-Wno-comments", "" },
1191 { "-Wconversion", "Warn about possibly confusing type conversions" },
1192 { "-Wno-conversion", "" },
1193 { "-Wformat", "Warn about printf format anomalies" },
1194 { "-Wno-format", "" },
1195 { "-Wimplicit-function-declaration",
1196 "Warn about implicit function declarations" },
1197 { "-Wno-implicit-function-declaration", "" },
1198 { "-Werror-implicit-function-declaration", "" },
1199 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1200 { "-Wno-implicit-int", "" },
1201 { "-Wimplicit", "" },
1202 { "-Wno-implicit", "" },
1203 { "-Wimport", "Warn about the use of the #import directive" },
1204 { "-Wno-import", "" },
1205 { "-Wlong-long","" },
1206 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1207 { "-Wmain", "Warn about suspicious declarations of main" },
1208 { "-Wno-main", "" },
1209 { "-Wmissing-braces",
1210 "Warn about possibly missing braces around initialisers" },
1211 { "-Wno-missing-braces", "" },
1212 { "-Wmissing-declarations",
1213 "Warn about global funcs without previous declarations"},
1214 { "-Wno-missing-declarations", "" },
1215 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1216 { "-Wno-missing-prototypes", "" },
1217 { "-Wmultichar", "Warn about use of multicharacter literals"},
1218 { "-Wno-multichar", "" },
1219 { "-Wnested-externs", "Warn about externs not at file scope level" },
1220 { "-Wno-nested-externs", "" },
1221 { "-Wparentheses", "Warn about possible missing parentheses" },
1222 { "-Wno-parentheses", "" },
1223 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1224 { "-Wno-pointer-arith", "" },
1225 { "-Wredundant-decls",
1226 "Warn about multiple declarations of the same object" },
1227 { "-Wno-redundant-decls", "" },
1228 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1229 { "-Wno-sign-compare", "" },
1230 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1231 { "-Wno-float-equal", "" },
1232 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1233 { "-Wno-unknown-pragmas", "" },
1234 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1235 { "-Wno-strict-prototypes", "" },
1236 { "-Wtraditional", "Warn about constructs whose meaning change in ISO C"},
1237 { "-Wno-traditional", "" },
1238 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1239 { "-Wno-trigraphs", "" },
1241 { "-Wno-undef", "" },
1242 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1243 { "-Wno-write-strings", "" },
1245 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1247 #include "options.h"
1251 /* Here is a table, controlled by the tm.h file, listing each -m switch
1252 and which bits in `target_switches' it should set or clear.
1253 If VALUE is positive, it is bits to set.
1254 If VALUE is negative, -VALUE is bits to clear.
1255 (The sign bit is not used so there is no confusion.) */
1261 const char *description;
1263 target_switches [] = TARGET_SWITCHES;
1265 /* This table is similar, but allows the switch to have a value. */
1267 #ifdef TARGET_OPTIONS
1271 const char **variable;
1272 const char *description;
1274 target_options [] = TARGET_OPTIONS;
1277 /* Options controlling warnings. */
1279 /* Don't print warning messages. -w. */
1281 int inhibit_warnings = 0;
1283 /* Print various extra warnings. -W. */
1285 int extra_warnings = 0;
1287 /* Treat warnings as errors. -Werror. */
1289 int warnings_are_errors = 0;
1291 /* Nonzero to warn about unused variables, functions et.al. */
1293 int warn_unused_function;
1294 int warn_unused_label;
1295 int warn_unused_parameter;
1296 int warn_unused_variable;
1297 int warn_unused_value;
1300 set_Wunused (setting)
1303 warn_unused_function = setting;
1304 warn_unused_label = setting;
1305 /* Unused function parameter warnings are reported when either ``-W
1306 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1307 -Wunused by setting WARN_UNUSED_PARAMETER to -1. */
1309 warn_unused_parameter = 0;
1310 else if (!warn_unused_parameter)
1311 warn_unused_parameter = -1;
1312 warn_unused_variable = setting;
1313 warn_unused_value = setting;
1316 /* Nonzero to warn about code which is never reached. */
1318 int warn_notreached;
1320 /* Nonzero to warn about variables used before they are initialized. */
1322 int warn_uninitialized;
1324 /* Nonzero means warn about all declarations which shadow others. */
1328 /* Warn if a switch on an enum fails to have a case for every enum value. */
1332 /* Nonzero means warn about function definitions that default the return type
1333 or that use a null return and have a return-type other than void. */
1335 int warn_return_type;
1337 /* Nonzero means warn about pointer casts that increase the required
1338 alignment of the target type (and might therefore lead to a crash
1339 due to a misaligned access). */
1341 int warn_cast_align;
1343 /* Nonzero means warn about any identifiers that match in the first N
1344 characters. The value N is in `id_clash_len'. */
1349 /* Nonzero means warn about any objects definitions whose size is larger
1350 than N bytes. Also want about function definitions whose returned
1351 values are larger than N bytes. The value N is in `larger_than_size'. */
1353 int warn_larger_than;
1354 HOST_WIDE_INT larger_than_size;
1356 /* Nonzero means warn if inline function is too large. */
1360 /* Warn if a function returns an aggregate,
1361 since there are often incompatible calling conventions for doing this. */
1363 int warn_aggregate_return;
1365 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1369 /* Warn when gcc pads a structure to an alignment boundary. */
1373 /* Likewise for -W. */
1375 lang_independent_options W_options[] =
1377 {"unused-function", &warn_unused_function, 1, "Warn when a function is unused" },
1378 {"unused-label", &warn_unused_label, 1, "Warn when a label is unused" },
1379 {"unused-parameter", &warn_unused_parameter, 1, "Warn when a function parameter is unused" },
1380 {"unused-variable", &warn_unused_variable, 1, "Warn when a variable is unused" },
1381 {"unused-value", &warn_unused_value, 1, "Warn when an expression value is unused" },
1382 {"error", &warnings_are_errors, 1, ""},
1383 {"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
1384 {"switch", &warn_switch, 1,
1385 "Warn about enumerated switches missing a specific case" },
1386 {"aggregate-return", &warn_aggregate_return, 1,
1387 "Warn about returning structures, unions or arrays" },
1388 {"cast-align", &warn_cast_align, 1,
1389 "Warn about pointer casts which increase alignment" },
1390 {"unreachable-code", &warn_notreached, 1,
1391 "Warn about code that will never be executed" },
1392 {"uninitialized", &warn_uninitialized, 1,
1393 "Warn about unitialized automatic variables"},
1394 {"inline", &warn_inline, 1,
1395 "Warn when an inlined function cannot be inlined"},
1396 {"packed", &warn_packed, 1,
1397 "Warn when the packed attribute has no effect on struct layout"},
1398 {"padded", &warn_padded, 1,
1399 "Warn when padding is required to align struct members"}
1402 /* Output files for assembler code (real compiler output)
1403 and debugging dumps. */
1406 FILE *aux_info_file;
1407 FILE *rtl_dump_file = NULL;
1409 /* Decode the string P as an integral parameter.
1410 If the string is indeed an integer return its numeric value else
1411 issue an Invalid Option error for the option PNAME and return DEFVAL.
1412 If PNAME is zero just return DEFVAL, do not call error. */
1415 read_integral_parameter (p, pname, defval)
1420 const char *endp = p;
1424 if (*endp >= '0' && *endp <= '9')
1433 error ("Invalid option `%s'", pname);
1441 /* This is the default decl_printable_name function. */
1444 decl_name (decl, verbosity)
1446 int verbosity ATTRIBUTE_UNUSED;
1448 return IDENTIFIER_POINTER (DECL_NAME (decl));
1451 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1457 struct file_stack *stack = *(struct file_stack **)p;
1459 /* We're only called for input_file_stack, so we can mark the current
1460 input_filename here as well. */
1461 ggc_mark_string (main_input_filename);
1462 ggc_mark_string (input_filename);
1466 ggc_mark_string (stack->name);
1467 stack = stack->next;
1472 /* This calls abort and is used to avoid problems when abort if a macro.
1473 It is used when we need to pass the address of abort. */
1481 /* When `malloc.c' is compiled with `rcheck' defined,
1482 it calls this function to report clobberage. */
1486 const char *s ATTRIBUTE_UNUSED;
1491 /* Return the logarithm of X, base 2, considering X unsigned,
1492 if X is a power of 2. Otherwise, returns -1.
1494 This should be used via the `exact_log2' macro. */
1498 register unsigned HOST_WIDE_INT x;
1500 register int log = 0;
1501 /* Test for 0 or a power of 2. */
1502 if (x == 0 || x != (x & -x))
1504 while ((x >>= 1) != 0)
1509 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1510 If X is 0, return -1.
1512 This should be used via the floor_log2 macro. */
1516 register unsigned HOST_WIDE_INT x;
1518 register int log = -1;
1525 static int float_handler_set;
1527 jmp_buf float_handler;
1529 /* Signals actually come here. */
1532 float_signal (signo)
1533 /* If this is missing, some compilers complain. */
1534 int signo ATTRIBUTE_UNUSED;
1536 if (float_handled == 0)
1537 crash_signal (signo);
1538 #if defined (USG) || defined (hpux)
1539 /* Re-enable the signal catcher. */
1540 signal (SIGFPE, float_signal);
1543 signal (SIGFPE, float_signal);
1544 longjmp (float_handler, 1);
1547 /* Specify where to longjmp to when a floating arithmetic error happens.
1548 If HANDLER is 0, it means don't handle the errors any more. */
1551 set_float_handler (handler)
1554 float_handled = (handler != 0);
1556 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1558 if (float_handled && ! float_handler_set)
1560 signal (SIGFPE, float_signal);
1561 float_handler_set = 1;
1565 /* This is a wrapper function for code which might elicit an
1566 arithmetic exception. That code should be passed in as a function
1567 pointer FN, and one argument DATA. DATA is usually a struct which
1568 contains the real input and output for function FN. This function
1569 returns 0 (failure) if longjmp was called (i.e. an exception
1570 occured.) It returns 1 (success) otherwise. */
1573 do_float_handler (fn, data)
1574 void (*fn) PARAMS ((PTR));
1581 /* We got here via longjmp () caused by an exception in function
1583 set_float_handler (NULL);
1587 set_float_handler (buf);
1589 set_float_handler (NULL);
1593 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1594 error happens, pushing the previous specification into OLD_HANDLER.
1595 Return an indication of whether there was a previous handler in effect. */
1598 push_float_handler (handler, old_handler)
1599 jmp_buf handler, old_handler;
1601 int was_handled = float_handled;
1605 memcpy ((char *) old_handler, (char *) float_handler,
1606 sizeof (float_handler));
1608 memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
1612 /* Restore the previous specification of whether and where to longjmp to
1613 when a floating arithmetic error happens. */
1616 pop_float_handler (handled, handler)
1620 float_handled = handled;
1622 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1625 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1626 into ICE messages, which is much more user friendly. */
1629 crash_signal (signo)
1630 /* If this is missing, some compilers complain. */
1633 fatal ("Internal error: %s.\n\
1634 Please submit a full bug report.\n\
1635 See %s for instructions.", strsignal (signo), GCCBUGURL);
1638 /* Strip off a legitimate source ending from the input string NAME of
1639 length LEN. Rather than having to know the names used by all of
1640 our front ends, we strip off an ending of a period followed by
1641 up to five characters. (Java uses ".class".) */
1644 strip_off_ending (name, len)
1649 for (i = 2; i < 6 && len > i; i++)
1651 if (name[len - i] == '.')
1653 name[len - i] = '\0';
1659 /* Output a quoted string. */
1662 output_quoted_string (asm_file, string)
1666 #ifdef OUTPUT_QUOTED_STRING
1667 OUTPUT_QUOTED_STRING (asm_file, string);
1671 putc ('\"', asm_file);
1672 while ((c = *string++) != 0)
1674 if (c == '\"' || c == '\\')
1675 putc ('\\', asm_file);
1678 putc ('\"', asm_file);
1682 /* Output a file name in the form wanted by System V. */
1685 output_file_directive (asm_file, input_name)
1687 const char *input_name;
1689 int len = strlen (input_name);
1690 const char *na = input_name + len;
1692 /* NA gets INPUT_NAME sans directory names. */
1693 while (na > input_name)
1695 if (IS_DIR_SEPARATOR (na[-1]))
1700 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1701 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1703 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1704 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1706 fprintf (asm_file, "\t.file\t");
1707 output_quoted_string (asm_file, na);
1708 fputc ('\n', asm_file);
1713 #ifdef ASM_IDENTIFY_LANGUAGE
1714 /* Routine to build language identifier for object file. */
1717 output_lang_identify (asm_out_file)
1720 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1721 char *s = (char *) alloca (len);
1723 sprintf (s, "__gnu_compiled_%s", lang_identify ());
1724 ASM_OUTPUT_LABEL (asm_out_file, s);
1728 /* Routine to open a dump file. Return true if the dump file is enabled. */
1731 open_dump_file (index, decl)
1732 enum dump_file_index index;
1736 const char *open_arg;
1739 if (! dump_file[index].enabled)
1742 timevar_push (TV_DUMP);
1743 if (rtl_dump_file != NULL)
1744 fclose (rtl_dump_file);
1746 sprintf (seq, ".%02d.", index);
1748 if (! dump_file[index].initialized)
1750 /* If we've not initialized the files, do so now. */
1751 if (graph_dump_format != no_graph
1752 && dump_file[index].graph_dump_p)
1754 dump_name = concat (seq, dump_file[index].extension, NULL);
1755 clean_graph_dump_file (dump_base_name, dump_name);
1758 dump_file[index].initialized = 1;
1764 dump_name = concat (dump_base_name, seq,
1765 dump_file[index].extension, NULL);
1767 rtl_dump_file = fopen (dump_name, open_arg);
1768 if (rtl_dump_file == NULL)
1769 pfatal_with_name (dump_name);
1774 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
1775 decl_printable_name (decl, 2));
1777 timevar_pop (TV_DUMP);
1781 /* Routine to close a dump file. */
1784 close_dump_file (index, func, insns)
1785 enum dump_file_index index;
1786 void (*func) PARAMS ((FILE *, rtx));
1789 if (! rtl_dump_file)
1792 timevar_push (TV_DUMP);
1794 && graph_dump_format != no_graph
1795 && dump_file[index].graph_dump_p)
1800 sprintf (seq, ".%02d.", index);
1801 suffix = concat (seq, dump_file[index].extension, NULL);
1802 print_rtl_graph_with_bb (dump_base_name, suffix, insns);
1807 func (rtl_dump_file, insns);
1809 fflush (rtl_dump_file);
1810 fclose (rtl_dump_file);
1812 rtl_dump_file = NULL;
1813 timevar_pop (TV_DUMP);
1816 /* Do any final processing required for the declarations in VEC, of
1817 which there are LEN. We write out inline functions and variables
1818 that have been deferred until this point, but which are required.
1819 Returns non-zero if anything was put out. */
1822 wrapup_global_declarations (vec, len)
1829 int output_something = 0;
1831 for (i = 0; i < len; i++)
1835 /* We're not deferring this any longer. */
1836 DECL_DEFER_OUTPUT (decl) = 0;
1838 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1839 && incomplete_decl_finalize_hook != 0)
1840 (*incomplete_decl_finalize_hook) (decl);
1843 /* Now emit any global variables or functions that we have been
1844 putting off. We need to loop in case one of the things emitted
1845 here references another one which comes earlier in the list. */
1849 for (i = 0; i < len; i++)
1853 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1856 /* Don't write out static consts, unless we still need them.
1858 We also keep static consts if not optimizing (for debugging),
1859 unless the user specified -fno-keep-static-consts.
1860 ??? They might be better written into the debug information.
1861 This is possible when using DWARF.
1863 A language processor that wants static constants to be always
1864 written out (even if it is not used) is responsible for
1865 calling rest_of_decl_compilation itself. E.g. the C front-end
1866 calls rest_of_decl_compilation from finish_decl.
1867 One motivation for this is that is conventional in some
1868 environments to write things like:
1869 static const char rcsid[] = "... version string ...";
1870 intending to force the string to be in the executable.
1872 A language processor that would prefer to have unneeded
1873 static constants "optimized away" would just defer writing
1874 them out until here. E.g. C++ does this, because static
1875 constants are often defined in header files.
1877 ??? A tempting alternative (for both C and C++) would be
1878 to force a constant to be written if and only if it is
1879 defined in a main file, as opposed to an include file. */
1881 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1882 && (! TREE_READONLY (decl)
1883 || TREE_PUBLIC (decl)
1884 || (!optimize && flag_keep_static_consts)
1885 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1888 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1891 if (TREE_CODE (decl) == FUNCTION_DECL
1892 && DECL_INITIAL (decl) != 0
1893 && DECL_SAVED_INSNS (decl) != 0
1894 && (flag_keep_inline_functions
1895 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1896 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1899 temporary_allocation ();
1900 output_inline_function (decl);
1901 permanent_allocation (1);
1906 output_something = 1;
1910 return output_something;
1913 /* Issue appropriate warnings for the global declarations in VEC (of
1914 which there are LEN). Output debugging information for them. */
1917 check_global_declarations (vec, len)
1924 for (i = 0; i < len; i++)
1928 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1929 && ! TREE_ASM_WRITTEN (decl))
1930 /* Cancel the RTL for this decl so that, if debugging info
1931 output for global variables is still to come,
1932 this one will be omitted. */
1933 DECL_RTL (decl) = NULL;
1935 /* Warn about any function
1936 declared static but not defined.
1937 We don't warn about variables,
1938 because many programs have static variables
1939 that exist only to get some text into the object file. */
1940 if (TREE_CODE (decl) == FUNCTION_DECL
1941 && (warn_unused_function
1942 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1943 && DECL_INITIAL (decl) == 0
1944 && DECL_EXTERNAL (decl)
1945 && ! DECL_ARTIFICIAL (decl)
1946 && ! TREE_PUBLIC (decl))
1948 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1949 pedwarn_with_decl (decl,
1950 "`%s' used but never defined");
1952 warning_with_decl (decl,
1953 "`%s' declared `static' but never defined");
1954 /* This symbol is effectively an "extern" declaration now. */
1955 TREE_PUBLIC (decl) = 1;
1956 assemble_external (decl);
1959 /* Warn about static fns or vars defined but not used,
1960 but not about inline functions or static consts
1961 since defining those in header files is normal practice. */
1962 if (((warn_unused_function
1963 && TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
1964 || (warn_unused_variable
1965 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
1966 && ! DECL_IN_SYSTEM_HEADER (decl)
1967 && ! DECL_EXTERNAL (decl)
1968 && ! TREE_PUBLIC (decl)
1969 && ! TREE_USED (decl)
1970 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
1971 /* The TREE_USED bit for file-scope decls
1972 is kept in the identifier, to handle multiple
1973 external decls in different scopes. */
1974 && ! TREE_USED (DECL_NAME (decl)))
1975 warning_with_decl (decl, "`%s' defined but not used");
1977 timevar_push (TV_SYMOUT);
1978 #ifdef SDB_DEBUGGING_INFO
1979 /* The COFF linker can move initialized global vars to the end.
1980 And that can screw up the symbol ordering.
1981 By putting the symbols in that order to begin with,
1982 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1983 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1984 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1985 && ! DECL_EXTERNAL (decl)
1986 && DECL_RTL (decl) != 0)
1987 sdbout_symbol (decl, 0);
1989 /* Output COFF information for non-global
1990 file-scope initialized variables. */
1991 if (write_symbols == SDB_DEBUG
1992 && TREE_CODE (decl) == VAR_DECL
1993 && DECL_INITIAL (decl)
1994 && ! DECL_EXTERNAL (decl)
1995 && DECL_RTL (decl) != 0
1996 && GET_CODE (DECL_RTL (decl)) == MEM)
1997 sdbout_toplevel_data (decl);
1998 #endif /* SDB_DEBUGGING_INFO */
1999 #ifdef DWARF_DEBUGGING_INFO
2000 /* Output DWARF information for file-scope tentative data object
2001 declarations, file-scope (extern) function declarations (which
2002 had no corresponding body) and file-scope tagged type declarations
2003 and definitions which have not yet been forced out. */
2005 if (write_symbols == DWARF_DEBUG
2006 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2007 dwarfout_file_scope_decl (decl, 1);
2009 #ifdef DWARF2_DEBUGGING_INFO
2010 /* Output DWARF2 information for file-scope tentative data object
2011 declarations, file-scope (extern) function declarations (which
2012 had no corresponding body) and file-scope tagged type declarations
2013 and definitions which have not yet been forced out. */
2015 if (write_symbols == DWARF2_DEBUG
2016 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2017 dwarf2out_decl (decl);
2019 timevar_pop (TV_SYMOUT);
2023 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2024 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2025 INPUT_FILENAME and LINENO accordingly. */
2028 push_srcloc (file, line)
2032 struct file_stack *fs;
2034 if (input_file_stack)
2036 input_file_stack->name = input_filename;
2037 input_file_stack->line = lineno;
2040 fs = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2041 fs->name = input_filename = file;
2042 fs->line = lineno = line;
2043 fs->indent_level = 0;
2044 fs->next = input_file_stack;
2045 input_file_stack = fs;
2046 input_file_stack_tick++;
2049 /* Pop the top entry off the stack of presently open source files.
2050 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2056 struct file_stack *fs;
2058 fs = input_file_stack;
2059 input_file_stack = fs->next;
2061 input_file_stack_tick++;
2062 /* The initial souce file is never popped. */
2063 if (!input_file_stack)
2065 input_filename = input_file_stack->name;
2066 lineno = input_file_stack->line;
2069 /* Compile an entire file of output from cpp, named NAME.
2070 Write a file of assembly output and various debugging dumps. */
2078 int name_specified = name != 0;
2080 if (dump_base_name == 0)
2081 dump_base_name = name ? name : "gccdump";
2083 /* Start timing total execution time. */
2086 timevar_start (TV_TOTAL);
2088 /* Initialize data in various passes. */
2092 name = init_parse (name);
2093 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2094 || debug_info_level == DINFO_LEVEL_VERBOSE
2095 || flag_test_coverage
2096 || warn_notreached);
2099 init_decl_processing ();
2105 init_function_once ();
2106 init_stor_layout_once ();
2107 init_varasm_once ();
2109 /* The following initialization functions need to generate rtl, so
2110 provide a dummy function context for them. */
2111 init_dummy_function_start ();
2114 if (flag_caller_saves)
2115 init_caller_save ();
2116 expand_dummy_function_end ();
2118 /* If auxiliary info generation is desired, open the output file.
2119 This goes in the same directory as the source file--unlike
2120 all the other output files. */
2121 if (flag_gen_aux_info)
2123 aux_info_file = fopen (aux_info_file_name, "w");
2124 if (aux_info_file == 0)
2125 pfatal_with_name (aux_info_file_name);
2128 /* Open assembler code output file. Do this even if -fsyntax-only is on,
2129 because then the driver will have provided the name of a temporary
2130 file or bit bucket for us. */
2132 if (! name_specified && asm_file_name == 0)
2133 asm_out_file = stdout;
2136 if (asm_file_name == 0)
2138 int len = strlen (dump_base_name);
2139 char *dumpname = (char *) xmalloc (len + 6);
2140 memcpy (dumpname, dump_base_name, len + 1);
2141 strip_off_ending (dumpname, len);
2142 strcat (dumpname, ".s");
2143 asm_file_name = dumpname;
2145 if (!strcmp (asm_file_name, "-"))
2146 asm_out_file = stdout;
2148 asm_out_file = fopen (asm_file_name, "w");
2149 if (asm_out_file == 0)
2150 pfatal_with_name (asm_file_name);
2153 #ifdef IO_BUFFER_SIZE
2154 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2155 _IOFBF, IO_BUFFER_SIZE);
2158 if (ggc_p && name != 0)
2159 name = ggc_alloc_string (name, strlen (name));
2161 input_filename = name;
2163 /* Put an entry on the input file stack for the main input file. */
2164 push_srcloc (input_filename, 0);
2166 /* Perform language-specific initialization.
2167 This may set main_input_filename. */
2170 /* If the input doesn't start with a #line, use the input name
2171 as the official input file name. */
2172 if (main_input_filename == 0)
2173 main_input_filename = name;
2175 if (flag_syntax_only)
2177 write_symbols = NO_DEBUG;
2179 profile_block_flag = 0;
2183 ASM_FILE_START (asm_out_file);
2185 #ifdef ASM_COMMENT_START
2186 if (flag_verbose_asm)
2188 /* Print the list of options in effect. */
2189 print_version (asm_out_file, ASM_COMMENT_START);
2190 print_switch_values (asm_out_file, 0, MAX_LINE,
2191 ASM_COMMENT_START, " ", "\n");
2192 /* Add a blank line here so it appears in assembler output but not
2194 fprintf (asm_out_file, "\n");
2198 /* Output something to inform GDB that this compilation was by GCC. */
2199 #ifndef ASM_IDENTIFY_GCC
2200 fprintf (asm_out_file, "gcc2_compiled.:\n");
2202 ASM_IDENTIFY_GCC (asm_out_file);
2205 /* Output something to identify which front-end produced this file. */
2206 #ifdef ASM_IDENTIFY_LANGUAGE
2207 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2209 } /* ! flag_syntax_only */
2211 #ifndef ASM_OUTPUT_SECTION_NAME
2212 if (flag_function_sections)
2214 warning ("-ffunction-sections not supported for this target.");
2215 flag_function_sections = 0;
2217 if (flag_data_sections)
2219 warning ("-fdata-sections not supported for this target.");
2220 flag_data_sections = 0;
2224 if (flag_function_sections
2225 && (profile_flag || profile_block_flag))
2227 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2228 flag_function_sections = 0;
2231 #ifndef OBJECT_FORMAT_ELF
2232 if (flag_function_sections && write_symbols != NO_DEBUG)
2233 warning ("-ffunction-sections may affect debugging on some targets.");
2236 /* ??? Note: There used to be a conditional here
2237 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2238 This was to guarantee separation between gcc_compiled. and
2239 the first function, for the sake of dbx on Suns.
2240 However, having the extra zero here confused the Emacs
2241 code for unexec, and might confuse other programs too.
2242 Therefore, I took out that change.
2243 In future versions we should find another way to solve
2244 that dbx problem. -- rms, 23 May 93. */
2246 /* Don't let the first function fall at the same address
2247 as gcc_compiled., if profiling. */
2248 if (profile_flag || profile_block_flag)
2250 /* It's best if we can write a nop here since some
2251 assemblers don't tolerate zeros in the text section. */
2252 output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
2255 /* If dbx symbol table desired, initialize writing it
2256 and output the predefined types. */
2257 timevar_push (TV_SYMOUT);
2258 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2259 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2260 dbxout_init (asm_out_file, main_input_filename, getdecls ());
2262 #ifdef SDB_DEBUGGING_INFO
2263 if (write_symbols == SDB_DEBUG)
2264 sdbout_init (asm_out_file, main_input_filename, getdecls ());
2266 #ifdef DWARF_DEBUGGING_INFO
2267 if (write_symbols == DWARF_DEBUG)
2268 dwarfout_init (asm_out_file, main_input_filename);
2270 #ifdef DWARF2_UNWIND_INFO
2271 if (dwarf2out_do_frame ())
2272 dwarf2out_frame_init ();
2274 #ifdef DWARF2_DEBUGGING_INFO
2275 if (write_symbols == DWARF2_DEBUG)
2276 dwarf2out_init (asm_out_file, main_input_filename);
2278 timevar_pop (TV_SYMOUT);
2280 /* Initialize yet another pass. */
2282 init_final (main_input_filename);
2283 init_branch_prob (dump_base_name);
2285 timevar_push (TV_PARSE);
2287 /* Call the parser, which parses the entire file
2288 (calling rest_of_compilation for each function). */
2290 if (yyparse () != 0)
2292 if (errorcount == 0)
2293 fnotice (stderr, "Errors detected in input file (your bison.simple is out of date)\n");
2295 /* In case there were missing closebraces,
2296 get us back to the global binding level. */
2297 while (! global_bindings_p ())
2301 /* Compilation is now finished except for writing
2302 what's left of the symbol table output. */
2304 timevar_pop (TV_PARSE);
2306 if (flag_syntax_only)
2309 globals = getdecls ();
2311 /* Really define vars that have had only a tentative definition.
2312 Really output inline functions that must actually be callable
2313 and have not been output so far. */
2316 int len = list_length (globals);
2317 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2321 /* Process the decls in reverse order--earliest first.
2322 Put them into VEC from back to front, then take out from front. */
2324 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2325 vec[len - i - 1] = decl;
2327 wrapup_global_declarations (vec, len);
2329 /* This must occur after the loop to output deferred functions. Else
2330 the profiler initializer would not be emitted if all the functions
2331 in this compilation unit were deferred.
2333 output_func_start_profiler can not cause any additional functions or
2334 data to need to be output, so it need not be in the deferred function
2336 output_func_start_profiler ();
2338 /* Now that all possible functions have been output, we can dump
2339 the exception table. */
2341 #ifndef IA64_UNWIND_INFO
2342 output_exception_table ();
2344 free_exception_table ();
2346 check_global_declarations (vec, len);
2352 /* Write out any pending weak symbol declarations. */
2356 /* Do dbx symbols. */
2357 timevar_push (TV_SYMOUT);
2358 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2359 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2360 dbxout_finish (asm_out_file, main_input_filename);
2363 #ifdef DWARF_DEBUGGING_INFO
2364 if (write_symbols == DWARF_DEBUG)
2368 #ifdef DWARF2_UNWIND_INFO
2369 if (dwarf2out_do_frame ())
2370 dwarf2out_frame_finish ();
2373 #ifdef DWARF2_DEBUGGING_INFO
2374 if (write_symbols == DWARF2_DEBUG)
2375 dwarf2out_finish ();
2377 timevar_pop (TV_SYMOUT);
2379 /* Output some stuff at end of file if nec. */
2381 end_final (dump_base_name);
2383 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
2385 timevar_push (TV_DUMP);
2386 open_dump_file (DFI_bp, NULL);
2390 close_dump_file (DFI_bp, NULL, NULL_RTX);
2391 timevar_pop (TV_DUMP);
2395 ASM_FILE_END (asm_out_file);
2398 /* Language-specific end of compilation actions. */
2402 /* Close the dump files. */
2404 if (flag_gen_aux_info)
2406 fclose (aux_info_file);
2408 unlink (aux_info_file_name);
2411 if (optimize > 0 && open_dump_file (DFI_combine, NULL))
2413 timevar_push (TV_DUMP);
2414 dump_combine_total_stats (rtl_dump_file);
2415 close_dump_file (DFI_combine, NULL, NULL_RTX);
2416 timevar_pop (TV_DUMP);
2419 /* Close non-debugging input and output files. Take special care to note
2420 whether fclose returns an error, since the pages might still be on the
2421 buffer chain while the file is open. */
2425 if (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0)
2426 fatal_io_error (asm_file_name);
2428 /* Do whatever is necessary to finish printing the graphs. */
2429 if (graph_dump_format != no_graph)
2433 for (i = 0; i < DFI_MAX; ++i)
2434 if (dump_file[i].initialized && dump_file[i].graph_dump_p)
2439 sprintf (seq, ".%02d.", i);
2440 suffix = concat (seq, dump_file[i].extension, NULL);
2441 finish_graph_dump_file (dump_base_name, suffix);
2446 /* Free up memory for the benefit of leak detectors. */
2449 /* Stop timing total execution time. */
2450 timevar_stop (TV_TOTAL);
2452 /* Print the times. */
2454 timevar_print (stderr);
2457 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2458 and TYPE_DECL nodes.
2460 This does nothing for local (non-static) variables, unless the
2461 variable is a register variable with an ASMSPEC. In that case, or
2462 if the variable is not an automatice, it sets up the RTL and
2463 outputs any assembler code (label definition, storage allocation
2464 and initialization).
2466 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2467 the assembler symbol name to be used. TOP_LEVEL is nonzero
2468 if this declaration is not within a function. */
2471 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2473 const char *asmspec;
2477 /* Declarations of variables, and of functions defined elsewhere. */
2479 /* The most obvious approach, to put an #ifndef around where
2480 this macro is used, doesn't work since it's inside a macro call. */
2481 #ifndef ASM_FINISH_DECLARE_OBJECT
2482 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2485 /* Forward declarations for nested functions are not "external",
2486 but we need to treat them as if they were. */
2487 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2488 || TREE_CODE (decl) == FUNCTION_DECL)
2490 timevar_push (TV_VARCONST);
2491 make_decl_rtl (decl, asmspec, top_level);
2492 /* Initialized extern variable exists to be replaced
2493 with its value, or represents something that will be
2494 output in another file. */
2495 if (! (TREE_CODE (decl) == VAR_DECL
2496 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2497 && DECL_INITIAL (decl) != 0
2498 && DECL_INITIAL (decl) != error_mark_node))
2499 /* Don't output anything
2500 when a tentative file-scope definition is seen.
2501 But at end of compilation, do output code for them. */
2502 if (! (! at_end && top_level
2503 && (DECL_INITIAL (decl) == 0
2504 || DECL_INITIAL (decl) == error_mark_node)))
2505 assemble_variable (decl, top_level, at_end, 0);
2506 if (decl == last_assemble_variable_decl)
2508 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2511 timevar_pop (TV_VARCONST);
2513 else if (DECL_REGISTER (decl) && asmspec != 0)
2515 if (decode_reg_name (asmspec) >= 0)
2517 DECL_RTL (decl) = 0;
2518 make_decl_rtl (decl, asmspec, top_level);
2521 error ("invalid register name `%s' for register variable", asmspec);
2523 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2524 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2525 && TREE_CODE (decl) == TYPE_DECL)
2527 timevar_push (TV_SYMOUT);
2528 dbxout_symbol (decl, 0);
2529 timevar_pop (TV_SYMOUT);
2532 #ifdef SDB_DEBUGGING_INFO
2533 else if (write_symbols == SDB_DEBUG && top_level
2534 && TREE_CODE (decl) == TYPE_DECL)
2536 timevar_push (TV_SYMOUT);
2537 sdbout_symbol (decl, 0);
2538 timevar_pop (TV_SYMOUT);
2543 /* Called after finishing a record, union or enumeral type. */
2546 rest_of_type_compilation (type, toplev)
2547 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2551 tree type ATTRIBUTE_UNUSED;
2552 int toplev ATTRIBUTE_UNUSED;
2555 timevar_push (TV_SYMOUT);
2556 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2557 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2558 dbxout_symbol (TYPE_STUB_DECL (type), !toplev);
2560 #ifdef SDB_DEBUGGING_INFO
2561 if (write_symbols == SDB_DEBUG)
2562 sdbout_symbol (TYPE_STUB_DECL (type), !toplev);
2564 timevar_pop (TV_SYMOUT);
2567 /* DECL is an inline function, whose body is present, but which is not
2568 being output at this point. (We're putting that off until we need
2569 to do it.) If there are any actions that need to take place,
2570 including the emission of debugging information for the function,
2571 this is where they should go. This function may be called by
2572 language-dependent code for front-ends that do not even generate
2573 RTL for functions that don't need to be put out. */
2576 note_deferral_of_defined_inline_function (decl)
2577 tree decl ATTRIBUTE_UNUSED;
2579 #ifdef DWARF_DEBUGGING_INFO
2580 /* Generate the DWARF info for the "abstract" instance of a function
2581 which we may later generate inlined and/or out-of-line instances
2583 if (write_symbols == DWARF_DEBUG && DECL_INLINE (decl))
2585 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2586 DWARF code expects it to be set in this case. Intuitively,
2587 DECL is the function we just finished defining, so setting
2588 CURRENT_FUNCTION_DECL is sensible. */
2589 tree saved_cfd = current_function_decl;
2590 current_function_decl = decl;
2592 /* Let the DWARF code do its work. */
2593 set_decl_abstract_flags (decl, 1);
2594 dwarfout_file_scope_decl (decl, 0);
2595 set_decl_abstract_flags (decl, 0);
2597 /* Reset CURRENT_FUNCTION_DECL. */
2598 current_function_decl = saved_cfd;
2603 /* This is called from finish_function (within yyparse)
2604 after each top-level definition is parsed.
2605 It is supposed to compile that function or variable
2606 and output the assembler code for it.
2607 After we return, the tree storage is freed. */
2610 rest_of_compilation (decl)
2616 int rebuild_label_notes_after_reload;
2617 int register_life_up_to_date;
2619 timevar_push (TV_REST_OF_COMPILATION);
2621 /* When processing delayed functions, prepare_function_start() won't
2622 have been run to re-initialize it. */
2623 cse_not_expected = ! optimize;
2625 /* First, make sure that NOTE_BLOCK is set correctly for each
2626 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2627 if (!cfun->x_whole_function_mode_p)
2630 /* Then remove any notes we don't need. That will make iterating
2631 over the instruction sequence faster, and allow the garbage
2632 collector to reclaim the memory used by the notes. */
2633 remove_unnecessary_notes ();
2635 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2636 tree in sensible shape. So, we just recalculate it here. */
2637 if (cfun->x_whole_function_mode_p)
2640 /* If we are reconsidering an inline function
2641 at the end of compilation, skip the stuff for making it inline. */
2643 if (DECL_SAVED_INSNS (decl) == 0)
2649 /* If this is nested inside an inlined external function, pretend
2650 it was only declared. Since we cannot inline such functions,
2651 generating code for this one is not only not necessary but will
2652 confuse some debugging output writers. */
2653 for (parent = DECL_CONTEXT (current_function_decl);
2654 parent != NULL_TREE;
2655 parent = get_containing_scope (parent))
2656 if (TREE_CODE (parent) == FUNCTION_DECL
2657 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2659 DECL_INITIAL (decl) = 0;
2660 goto exit_rest_of_compilation;
2663 /* If requested, consider whether to make this function inline. */
2664 if (DECL_INLINE (decl) || flag_inline_functions)
2666 timevar_push (TV_INTEGRATION);
2667 lose = function_cannot_inline_p (decl);
2668 timevar_pop (TV_INTEGRATION);
2669 if (lose || ! optimize)
2671 if (warn_inline && DECL_INLINE (decl))
2672 warning_with_decl (decl, lose);
2673 DECL_ABSTRACT_ORIGIN (decl) = 0;
2674 /* Don't really compile an extern inline function.
2675 If we can't make it inline, pretend
2676 it was only declared. */
2677 if (DECL_EXTERNAL (decl))
2679 DECL_INITIAL (decl) = 0;
2680 goto exit_rest_of_compilation;
2684 /* ??? Note that this has the effect of making it look
2685 like "inline" was specified for a function if we choose
2686 to inline it. This isn't quite right, but it's
2687 probably not worth the trouble to fix. */
2688 inlinable = DECL_INLINE (decl) = 1;
2691 insns = get_insns ();
2693 /* Dump the rtl code if we are dumping rtl. */
2695 if (open_dump_file (DFI_rtl, decl))
2697 if (DECL_SAVED_INSNS (decl))
2698 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2699 close_dump_file (DFI_rtl, print_rtl, insns);
2702 /* If function is inline, and we don't yet know whether to
2703 compile it by itself, defer decision till end of compilation.
2704 finish_compilation will call rest_of_compilation again
2705 for those functions that need to be output. Also defer those
2706 functions that we are supposed to defer. */
2709 || (DECL_INLINE (decl)
2710 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2711 && ! flag_keep_inline_functions)
2712 || DECL_EXTERNAL (decl))))
2713 DECL_DEFER_OUTPUT (decl) = 1;
2715 if (DECL_INLINE (decl))
2716 /* DWARF wants seperate debugging info for abstract and
2717 concrete instances of all inline functions, including those
2718 declared inline but not inlined, and those inlined even
2719 though they weren't declared inline. Conveniently, that's
2720 what DECL_INLINE means at this point. */
2721 note_deferral_of_defined_inline_function (decl);
2723 if (DECL_DEFER_OUTPUT (decl))
2725 /* If -Wreturn-type, we have to do a bit of compilation.
2726 However, if we just fall through we will call
2727 save_for_inline_copying() which results in excessive
2728 memory use. Instead, we just want to call
2729 jump_optimize() to figure out whether or not we can fall
2730 off the end of the function; we do the minimum amount of
2731 work necessary to make that safe. And, we set optimize
2732 to zero to keep jump_optimize from working too hard. */
2733 if (warn_return_type)
2735 int saved_optimize = optimize;
2737 find_exception_handler_labels ();
2738 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2739 !JUMP_AFTER_REGSCAN);
2740 optimize = saved_optimize;
2743 current_function_nothrow = nothrow_function_p ();
2744 if (current_function_nothrow)
2745 /* Now we know that this can't throw; set the flag for the benefit
2746 of other functions later in this translation unit. */
2747 TREE_NOTHROW (current_function_decl) = 1;
2749 timevar_push (TV_INTEGRATION);
2750 save_for_inline_nocopy (decl);
2751 timevar_pop (TV_INTEGRATION);
2752 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2753 goto exit_rest_of_compilation;
2756 /* If specified extern inline but we aren't inlining it, we are
2757 done. This goes for anything that gets here with DECL_EXTERNAL
2758 set, not just things with DECL_INLINE. */
2759 if (DECL_EXTERNAL (decl))
2760 goto exit_rest_of_compilation;
2763 init_EXPR_INSN_LIST_cache ();
2768 /* Initialize some variables used by the optimizers. */
2769 init_function_for_compilation ();
2771 if (! DECL_DEFER_OUTPUT (decl))
2772 TREE_ASM_WRITTEN (decl) = 1;
2774 /* Now that integrate will no longer see our rtl, we need not distinguish
2775 between the return value of this function and the return value of called
2777 rtx_equal_function_value_matters = 0;
2779 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2780 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2781 goto exit_rest_of_compilation;
2783 /* Emit code to get eh context, if needed. */
2786 /* We may have potential sibling or tail recursion sites. Select one
2787 (of possibly multiple) methods of performing the call. */
2788 if (flag_optimize_sibling_calls)
2790 timevar_push (TV_JUMP);
2791 open_dump_file (DFI_sibling, decl);
2793 optimize_sibling_and_tail_recursive_calls ();
2795 close_dump_file (DFI_sibling, print_rtl, get_insns ());
2796 timevar_pop (TV_JUMP);
2800 /* If we are doing position-independent code generation, now
2801 is the time to output special prologues and epilogues.
2802 We do not want to do this earlier, because it just clutters
2803 up inline functions with meaningless insns. */
2808 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2809 Note that that may have been done above, in save_for_inline_copying.
2810 The call to resume_temporary_allocation near the end of this function
2811 goes back to the usual state of affairs. This must be done after
2812 we've built up any unwinders for exception handling, and done
2813 the FINALIZE_PIC work, if necessary. */
2815 rtl_in_current_obstack ();
2817 insns = get_insns ();
2819 /* Copy any shared structure that should not be shared. */
2820 unshare_all_rtl (current_function_decl, insns);
2822 #ifdef SETJMP_VIA_SAVE_AREA
2823 /* This must be performed before virutal register instantiation. */
2824 if (current_function_calls_alloca)
2825 optimize_save_area_alloca (insns);
2828 /* Instantiate all virtual registers. */
2829 instantiate_virtual_regs (current_function_decl, insns);
2831 /* Find all the EH handlers. */
2832 find_exception_handler_labels ();
2834 open_dump_file (DFI_jump, decl);
2836 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2837 are initialized and to compute whether control can drop off the end
2840 timevar_push (TV_JUMP);
2841 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2842 before jump optimization switches branch directions. */
2843 expected_value_to_br_prob ();
2845 reg_scan (insns, max_reg_num (), 0);
2846 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2847 JUMP_AFTER_REGSCAN);
2849 timevar_pop (TV_JUMP);
2851 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2852 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
2854 close_dump_file (DFI_jump, print_rtl, insns);
2855 goto exit_rest_of_compilation;
2858 timevar_push (TV_JUMP);
2862 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2863 cleanup_cfg (insns);
2865 /* ??? Run if-conversion before delete_null_pointer_checks,
2866 since the later does not preserve the CFG. This should
2867 be changed -- no since converting if's that are going to
2869 timevar_push (TV_IFCVT);
2871 timevar_pop (TV_IFCVT);
2873 /* Try to identify useless null pointer tests and delete them. */
2874 if (flag_delete_null_pointer_checks)
2875 delete_null_pointer_checks (insns);
2878 /* Jump optimization, and the removal of NULL pointer checks, may
2879 have reduced the number of instructions substantially. CSE, and
2880 future passes, allocate arrays whose dimensions involve the
2881 maximum instruction UID, so if we can reduce the maximum UID
2882 we'll save big on memory. */
2883 renumber_insns (rtl_dump_file);
2884 timevar_pop (TV_JUMP);
2886 close_dump_file (DFI_jump, print_rtl, insns);
2891 /* Perform common subexpression elimination.
2892 Nonzero value from `cse_main' means that jumps were simplified
2893 and some code may now be unreachable, so do
2894 jump optimization again. */
2898 open_dump_file (DFI_cse, decl);
2899 timevar_push (TV_CSE);
2901 reg_scan (insns, max_reg_num (), 1);
2903 if (flag_thread_jumps)
2905 timevar_push (TV_JUMP);
2906 thread_jumps (insns, max_reg_num (), 1);
2907 timevar_pop (TV_JUMP);
2910 tem = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
2912 /* If we are not running the second CSE pass, then we are no longer
2913 expecting CSE to be run. */
2914 cse_not_expected = !flag_rerun_cse_after_loop;
2916 if (tem || optimize > 1)
2918 timevar_push (TV_JUMP);
2919 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2920 !JUMP_AFTER_REGSCAN);
2921 timevar_pop (TV_JUMP);
2924 /* Run this after jump optmizations remove all the unreachable code
2925 so that unreachable code will not keep values live. */
2926 delete_trivially_dead_insns (insns, max_reg_num ());
2928 /* Try to identify useless null pointer tests and delete them. */
2929 if (flag_delete_null_pointer_checks)
2931 timevar_push (TV_JUMP);
2932 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2934 cleanup_cfg (insns);
2936 delete_null_pointer_checks (insns);
2937 timevar_pop (TV_JUMP);
2940 /* The second pass of jump optimization is likely to have
2941 removed a bunch more instructions. */
2942 renumber_insns (rtl_dump_file);
2944 timevar_pop (TV_CSE);
2945 close_dump_file (DFI_cse, print_rtl, insns);
2948 open_dump_file (DFI_addressof, decl);
2950 purge_addressof (insns);
2951 reg_scan (insns, max_reg_num (), 1);
2953 close_dump_file (DFI_addressof, print_rtl, insns);
2958 if (optimize > 0 && flag_ssa)
2960 /* Convert to SSA form. */
2962 timevar_push (TV_TO_SSA);
2963 open_dump_file (DFI_ssa, decl);
2965 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2966 cleanup_cfg (insns);
2969 close_dump_file (DFI_ssa, print_rtl_with_bb, insns);
2970 timevar_pop (TV_TO_SSA);
2972 /* The SSA implementation uses basic block numbers in its phi
2973 nodes. Thus, changing the control-flow graph or the basic
2974 blocks, e.g., calling find_basic_blocks () or cleanup_cfg (),
2975 may cause problems. */
2979 /* Remove dead code. */
2981 timevar_push (TV_DEAD_CODE_ELIM);
2982 open_dump_file (DFI_dce, decl);
2984 insns = get_insns ();
2985 eliminate_dead_code();
2987 close_dump_file (DFI_dce, print_rtl_with_bb, insns);
2988 timevar_pop (TV_DEAD_CODE_ELIM);
2991 /* Convert from SSA form. */
2993 timevar_push (TV_FROM_SSA);
2994 open_dump_file (DFI_ussa, decl);
2996 convert_from_ssa ();
2997 /* New registers have been created. Rescan their usage. */
2998 reg_scan (insns, max_reg_num (), 1);
2999 /* Life analysis used in SSA adds log_links but these
3000 shouldn't be there until the flow stage, so clear
3002 clear_log_links (insns);
3004 close_dump_file (DFI_ussa, print_rtl_with_bb, insns);
3005 timevar_pop (TV_FROM_SSA);
3011 /* Perform global cse. */
3013 if (optimize > 0 && flag_gcse)
3015 timevar_push (TV_GCSE);
3016 open_dump_file (DFI_gcse, decl);
3018 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3019 cleanup_cfg (insns);
3020 tem = gcse_main (insns, rtl_dump_file);
3022 /* If gcse altered any jumps, rerun jump optimizations to clean
3026 timevar_push (TV_JUMP);
3027 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
3028 !JUMP_AFTER_REGSCAN);
3029 timevar_pop (TV_JUMP);
3032 close_dump_file (DFI_gcse, print_rtl, insns);
3033 timevar_pop (TV_GCSE);
3039 /* Move constant computations out of loops. */
3043 timevar_push (TV_LOOP);
3044 open_dump_file (DFI_loop, decl);
3046 if (flag_rerun_loop_opt)
3048 /* We only want to perform unrolling once. */
3050 loop_optimize (insns, rtl_dump_file, 0);
3052 /* The first call to loop_optimize makes some instructions
3053 trivially dead. We delete those instructions now in the
3054 hope that doing so will make the heuristics in loop work
3055 better and possibly speed up compilation. */
3056 delete_trivially_dead_insns (insns, max_reg_num ());
3058 /* The regscan pass is currently necessary as the alias
3059 analysis code depends on this information. */
3060 reg_scan (insns, max_reg_num (), 1);
3062 loop_optimize (insns, rtl_dump_file,
3063 (flag_unroll_loops ? LOOP_UNROLL : 0) | LOOP_BCT);
3065 close_dump_file (DFI_loop, print_rtl, insns);
3066 timevar_pop (TV_LOOP);
3074 timevar_push (TV_CSE2);
3075 open_dump_file (DFI_cse2, decl);
3077 if (flag_rerun_cse_after_loop)
3079 /* Running another jump optimization pass before the second
3080 cse pass sometimes simplifies the RTL enough to allow
3081 the second CSE pass to do a better job. Jump_optimize can change
3082 max_reg_num so we must rerun reg_scan afterwards.
3083 ??? Rework to not call reg_scan so often. */
3084 timevar_push (TV_JUMP);
3086 reg_scan (insns, max_reg_num (), 0);
3087 jump_optimize (insns, !JUMP_CROSS_JUMP,
3088 !JUMP_NOOP_MOVES, JUMP_AFTER_REGSCAN);
3090 timevar_push (TV_IFCVT);
3092 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3093 cleanup_cfg (insns);
3096 timevar_pop(TV_IFCVT);
3098 timevar_pop (TV_JUMP);
3100 reg_scan (insns, max_reg_num (), 0);
3101 tem = cse_main (insns, max_reg_num (), 1, rtl_dump_file);
3105 timevar_push (TV_JUMP);
3106 jump_optimize (insns, !JUMP_CROSS_JUMP,
3107 !JUMP_NOOP_MOVES, !JUMP_AFTER_REGSCAN);
3108 timevar_pop (TV_JUMP);
3112 if (flag_thread_jumps)
3114 /* This pass of jump threading straightens out code
3115 that was kinked by loop optimization. */
3116 timevar_push (TV_JUMP);
3117 reg_scan (insns, max_reg_num (), 0);
3118 thread_jumps (insns, max_reg_num (), 0);
3119 timevar_pop (TV_JUMP);
3122 close_dump_file (DFI_cse2, print_rtl, insns);
3123 timevar_pop (TV_CSE2);
3129 cse_not_expected = 1;
3133 /* Do control and data flow analysis; wrote some of the results to
3136 timevar_push (TV_FLOW);
3137 open_dump_file (DFI_cfg, decl);
3139 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3140 cleanup_cfg (insns);
3142 close_dump_file (DFI_cfg, print_rtl_with_bb, insns);
3144 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3146 timevar_push (TV_BRANCH_PROB);
3147 open_dump_file (DFI_bp, decl);
3151 close_dump_file (DFI_bp, print_rtl_with_bb, insns);
3152 timevar_pop (TV_BRANCH_PROB);
3155 open_dump_file (DFI_life, decl);
3160 /* Discover and record the loop depth at the head of each basic
3161 block. The loop infrastructure does the real job for us. */
3162 flow_loops_find (&loops);
3164 /* Estimate using heuristics if no profiling info is available. */
3165 estimate_probability (&loops);
3168 flow_loops_dump (&loops, rtl_dump_file, 0);
3170 flow_loops_free (&loops);
3172 life_analysis (insns, rtl_dump_file, PROP_FINAL);
3173 mark_constant_function ();
3174 timevar_pop (TV_FLOW);
3176 register_life_up_to_date = 1;
3179 if (warn_uninitialized || extra_warnings)
3181 uninitialized_vars_warning (DECL_INITIAL (decl));
3183 setjmp_args_warning ();
3186 close_dump_file (DFI_life, print_rtl_with_bb, insns);
3191 /* If -opt, try combining insns through substitution. */
3195 int rebuild_jump_labels_after_combine = 0;
3197 timevar_push (TV_COMBINE);
3198 open_dump_file (DFI_combine, decl);
3200 rebuild_jump_labels_after_combine
3201 = combine_instructions (insns, max_reg_num ());
3203 /* Combining insns may have turned an indirect jump into a
3204 direct jump. Rebuid the JUMP_LABEL fields of jumping
3206 if (rebuild_jump_labels_after_combine)
3208 timevar_push (TV_JUMP);
3209 rebuild_jump_labels (insns);
3210 timevar_pop (TV_JUMP);
3212 timevar_push (TV_FLOW);
3213 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3214 cleanup_cfg (insns);
3216 /* Blimey. We've got to have the CFG up to date for the call to
3217 if_convert below. However, the random deletion of blocks
3218 without updating life info can wind up with Wierd Stuff in
3219 global_live_at_end. We then run sched1, which updates things
3220 properly, discovers the wierdness and aborts. */
3221 update_life_info (NULL, UPDATE_LIFE_GLOBAL_RM_NOTES,
3222 PROP_DEATH_NOTES | PROP_KILL_DEAD_CODE
3223 | PROP_SCAN_DEAD_CODE);
3225 timevar_pop (TV_FLOW);
3228 close_dump_file (DFI_combine, print_rtl_with_bb, insns);
3229 timevar_pop (TV_COMBINE);
3235 /* Rerun if-conversion, as combine may have simplified things enough to
3236 now meet sequence length restrictions. */
3239 timevar_push (TV_IFCVT);
3240 open_dump_file (DFI_ce, decl);
3246 close_dump_file (DFI_ce, print_rtl_with_bb, insns);
3247 timevar_pop (TV_IFCVT);
3250 /* Register allocation pre-pass, to reduce number of moves
3251 necessary for two-address machines. */
3252 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3254 timevar_push (TV_REGMOVE);
3255 open_dump_file (DFI_regmove, decl);
3257 regmove_optimize (insns, max_reg_num (), rtl_dump_file);
3259 close_dump_file (DFI_regmove, print_rtl_with_bb, insns);
3260 timevar_pop (TV_REGMOVE);
3266 /* Any of the several passes since flow1 will have munged register
3267 lifetime data a bit. */
3269 register_life_up_to_date = 0;
3271 #ifdef OPTIMIZE_MODE_SWITCHING
3274 timevar_push (TV_GCSE);
3276 if (optimize_mode_switching (NULL_PTR))
3278 /* We did work, and so had to regenerate global life information.
3279 Take advantage of this and don't re-recompute register life
3280 information below. */
3281 register_life_up_to_date = 1;
3284 timevar_pop (TV_GCSE);
3288 #ifdef INSN_SCHEDULING
3290 /* Print function header into sched dump now
3291 because doing the sched analysis makes some of the dump. */
3292 if (optimize > 0 && flag_schedule_insns)
3294 timevar_push (TV_SCHED);
3295 open_dump_file (DFI_sched, decl);
3297 /* Do control and data sched analysis,
3298 and write some of the results to dump file. */
3300 schedule_insns (rtl_dump_file);
3302 close_dump_file (DFI_sched, print_rtl_with_bb, insns);
3303 timevar_pop (TV_SCHED);
3308 /* Register lifetime information was updated as part of verifying
3310 register_life_up_to_date = 1;
3314 /* Determine if the current function is a leaf before running reload
3315 since this can impact optimizations done by the prologue and
3316 epilogue thus changing register elimination offsets. */
3317 current_function_is_leaf = leaf_function_p ();
3319 timevar_push (TV_LOCAL_ALLOC);
3320 open_dump_file (DFI_lreg, decl);
3322 /* Allocate pseudo-regs that are used only within 1 basic block.
3324 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3325 jump optimizer after register allocation and reloading are finished. */
3327 if (! register_life_up_to_date)
3328 recompute_reg_usage (insns, ! optimize_size);
3329 regclass (insns, max_reg_num (), rtl_dump_file);
3330 rebuild_label_notes_after_reload = local_alloc ();
3332 timevar_pop (TV_LOCAL_ALLOC);
3334 if (dump_file[DFI_lreg].enabled)
3336 timevar_push (TV_DUMP);
3338 dump_flow_info (rtl_dump_file);
3339 dump_local_alloc (rtl_dump_file);
3341 close_dump_file (DFI_lreg, print_rtl_with_bb, insns);
3342 timevar_pop (TV_DUMP);
3348 timevar_push (TV_GLOBAL_ALLOC);
3349 open_dump_file (DFI_greg, decl);
3351 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3352 pass fixing up any insns that are invalid. */
3355 failure = global_alloc (rtl_dump_file);
3358 build_insn_chain (insns);
3359 failure = reload (insns, 0);
3362 timevar_pop (TV_GLOBAL_ALLOC);
3365 goto exit_rest_of_compilation;
3370 /* Do a very simple CSE pass over just the hard registers. */
3373 timevar_push (TV_RELOAD_CSE_REGS);
3374 reload_cse_regs (insns);
3375 timevar_pop (TV_RELOAD_CSE_REGS);
3378 /* If optimizing, then go ahead and split insns now since we are about
3379 to recompute flow information anyway. */
3382 int old_labelnum = max_label_num ();
3384 split_all_insns (0);
3385 rebuild_label_notes_after_reload |= old_labelnum != max_label_num ();
3388 /* Register allocation and reloading may have turned an indirect jump into
3389 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3390 jumping instructions. */
3391 if (rebuild_label_notes_after_reload)
3393 timevar_push (TV_JUMP);
3395 rebuild_jump_labels (insns);
3397 timevar_pop (TV_JUMP);
3400 if (dump_file[DFI_greg].enabled)
3402 timevar_push (TV_DUMP);
3404 dump_global_regs (rtl_dump_file);
3406 close_dump_file (DFI_greg, print_rtl_with_bb, insns);
3407 timevar_pop (TV_DUMP);
3410 /* Re-create the death notes which were deleted during reload. */
3411 timevar_push (TV_FLOW2);
3412 open_dump_file (DFI_flow2, decl);
3414 jump_optimize (insns, !JUMP_CROSS_JUMP,
3415 !JUMP_NOOP_MOVES, !JUMP_AFTER_REGSCAN);
3416 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3418 /* On some machines, the prologue and epilogue code, or parts thereof,
3419 can be represented as RTL. Doing so lets us schedule insns between
3420 it and the rest of the code and also allows delayed branch
3421 scheduling to operate in the epilogue. */
3422 thread_prologue_and_epilogue_insns (insns);
3426 cleanup_cfg (insns);
3427 life_analysis (insns, rtl_dump_file, PROP_FINAL);
3429 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3430 even for machines with possibly nonzero RETURN_POPS_ARGS
3431 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3432 push instructions will have popping returns. */
3433 #ifndef PUSH_ROUNDING
3434 if (!ACCUMULATE_OUTGOING_ARGS)
3436 combine_stack_adjustments ();
3442 flow2_completed = 1;
3444 close_dump_file (DFI_flow2, print_rtl_with_bb, insns);
3445 timevar_pop (TV_FLOW2);
3449 timevar_push (TV_IFCVT2);
3450 open_dump_file (DFI_ce2, decl);
3454 close_dump_file (DFI_ce2, print_rtl_with_bb, insns);
3455 timevar_pop (TV_IFCVT2);
3458 #ifdef HAVE_peephole2
3459 if (optimize > 0 && flag_peephole2)
3461 timevar_push (TV_PEEPHOLE2);
3462 open_dump_file (DFI_peephole2, decl);
3464 peephole2_optimize (rtl_dump_file);
3466 close_dump_file (DFI_peephole2, print_rtl_with_bb, insns);
3467 timevar_pop (TV_PEEPHOLE2);
3471 if (optimize > 0 && flag_rename_registers)
3473 timevar_push (TV_RENAME_REGISTERS);
3474 open_dump_file (DFI_rnreg, decl);
3476 regrename_optimize ();
3478 close_dump_file (DFI_rnreg, print_rtl_with_bb, insns);
3479 timevar_pop (TV_RENAME_REGISTERS);
3482 #ifdef INSN_SCHEDULING
3483 if (optimize > 0 && flag_schedule_insns_after_reload)
3485 timevar_push (TV_SCHED2);
3486 open_dump_file (DFI_sched2, decl);
3488 /* Do control and data sched analysis again,
3489 and write some more of the results to dump file. */
3491 schedule_insns (rtl_dump_file);
3493 close_dump_file (DFI_sched2, print_rtl_with_bb, insns);
3494 timevar_pop (TV_SCHED2);
3501 #ifdef LEAF_REGISTERS
3502 current_function_uses_only_leaf_regs
3503 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3506 if (optimize > 0 && flag_reorder_blocks)
3508 timevar_push (TV_REORDER_BLOCKS);
3509 open_dump_file (DFI_bbro, decl);
3511 reorder_basic_blocks ();
3513 close_dump_file (DFI_bbro, print_rtl_with_bb, insns);
3514 timevar_pop (TV_REORDER_BLOCKS);
3517 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3518 Also do cross-jumping this time and delete no-op move insns. */
3522 timevar_push (TV_JUMP);
3523 open_dump_file (DFI_jump2, decl);
3525 jump_optimize (insns, JUMP_CROSS_JUMP, JUMP_NOOP_MOVES,
3526 !JUMP_AFTER_REGSCAN);
3528 /* CFG no longer kept up to date. */
3530 close_dump_file (DFI_jump2, print_rtl_with_bb, insns);
3531 timevar_pop (TV_JUMP);
3534 /* If a machine dependent reorganization is needed, call it. */
3535 #ifdef MACHINE_DEPENDENT_REORG
3536 open_dump_file (DFI_mach, decl);
3538 MACHINE_DEPENDENT_REORG (insns);
3540 close_dump_file (DFI_mach, print_rtl_with_bb, insns);
3546 /* If a scheduling pass for delayed branches is to be done,
3547 call the scheduling code. */
3550 if (optimize > 0 && flag_delayed_branch)
3552 timevar_push (TV_DBR_SCHED);
3553 open_dump_file (DFI_dbr, decl);
3555 dbr_schedule (insns, rtl_dump_file);
3557 close_dump_file (DFI_dbr, print_rtl_with_bb, insns);
3558 timevar_pop (TV_DBR_SCHED);
3565 /* Shorten branches.
3567 Note this must run before reg-stack because of death note (ab)use
3568 in the ia32 backend. */
3569 timevar_push (TV_SHORTEN_BRANCH);
3570 shorten_branches (get_insns ());
3571 timevar_pop (TV_SHORTEN_BRANCH);
3574 timevar_push (TV_REG_STACK);
3575 open_dump_file (DFI_stack, decl);
3577 reg_to_stack (insns, rtl_dump_file);
3579 close_dump_file (DFI_stack, print_rtl_with_bb, insns);
3580 timevar_pop (TV_REG_STACK);
3586 current_function_nothrow = nothrow_function_p ();
3587 if (current_function_nothrow)
3588 /* Now we know that this can't throw; set the flag for the benefit
3589 of other functions later in this translation unit. */
3590 TREE_NOTHROW (current_function_decl) = 1;
3592 /* Now turn the rtl into assembler code. */
3594 timevar_push (TV_FINAL);
3599 /* Get the function's name, as described by its RTL. This may be
3600 different from the DECL_NAME name used in the source file. */
3602 x = DECL_RTL (decl);
3603 if (GET_CODE (x) != MEM)
3606 if (GET_CODE (x) != SYMBOL_REF)
3608 fnname = XSTR (x, 0);
3610 assemble_start_function (decl, fnname);
3611 final_start_function (insns, asm_out_file, optimize);
3612 final (insns, asm_out_file, optimize, 0);
3613 final_end_function (insns, asm_out_file, optimize);
3614 assemble_end_function (decl, fnname);
3616 fflush (asm_out_file);
3618 /* Release all memory allocated by flow. */
3619 free_basic_block_vars (0);
3621 /* Release all memory held by regsets now. */
3622 regset_release_memory ();
3624 timevar_pop (TV_FINAL);
3629 /* Write DBX symbols if requested. */
3631 /* Note that for those inline functions where we don't initially
3632 know for certain that we will be generating an out-of-line copy,
3633 the first invocation of this routine (rest_of_compilation) will
3634 skip over this code by doing a `goto exit_rest_of_compilation;'.
3635 Later on, finish_compilation will call rest_of_compilation again
3636 for those inline functions that need to have out-of-line copies
3637 generated. During that call, we *will* be routed past here. */
3639 timevar_push (TV_SYMOUT);
3640 #ifdef DBX_DEBUGGING_INFO
3641 if (write_symbols == DBX_DEBUG)
3642 dbxout_function (decl);
3645 #ifdef DWARF_DEBUGGING_INFO
3646 if (write_symbols == DWARF_DEBUG)
3647 dwarfout_file_scope_decl (decl, 0);
3650 #ifdef DWARF2_DEBUGGING_INFO
3651 if (write_symbols == DWARF2_DEBUG)
3652 dwarf2out_decl (decl);
3654 timevar_pop (TV_SYMOUT);
3656 exit_rest_of_compilation:
3658 /* In case the function was not output,
3659 don't leave any temporary anonymous types
3660 queued up for sdb output. */
3661 #ifdef SDB_DEBUGGING_INFO
3662 if (write_symbols == SDB_DEBUG)
3663 sdbout_types (NULL_TREE);
3666 reload_completed = 0;
3667 flow2_completed = 0;
3670 timevar_push (TV_FINAL);
3672 /* Clear out the insn_length contents now that they are no
3674 init_insn_lengths ();
3676 /* Clear out the real_constant_chain before some of the rtx's
3677 it runs through become garbage. */
3678 clear_const_double_mem ();
3680 /* Cancel the effect of rtl_in_current_obstack. */
3681 resume_temporary_allocation ();
3683 /* Show no temporary slots allocated. */
3686 free_basic_block_vars (0);
3688 timevar_pop (TV_FINAL);
3690 /* Make sure volatile mem refs aren't considered valid operands for
3691 arithmetic insns. We must call this here if this is a nested inline
3692 function, since the above code leaves us in the init_recog state
3693 (from final.c), and the function context push/pop code does not
3694 save/restore volatile_ok.
3696 ??? Maybe it isn't necessary for expand_start_function to call this
3697 anymore if we do it here? */
3699 init_recog_no_volatile ();
3701 /* We're done with this function. Free up memory if we can. */
3702 free_after_parsing (cfun);
3703 if (! DECL_DEFER_OUTPUT (decl))
3704 free_after_compilation (cfun);
3710 timevar_pop (TV_REST_OF_COMPILATION);
3721 printf (_("Usage: %s input [switches]\n"), progname);
3722 printf (_("Switches:\n"));
3724 printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
3725 printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
3726 printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
3727 printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
3728 printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
3729 printf (_(" -fdiagnostics-show-location=[once | never] Indicates how often source location information should be emitted, as prefix, at the beginning of diagnostics when line-wrapping\n"));
3731 for (i = ARRAY_SIZE (f_options); i--;)
3733 const char *description = f_options[i].description;
3735 if (description != NULL && * description != 0)
3736 printf (" -f%-21s %s\n",
3737 f_options[i].string, description);
3740 printf (_(" -O[number] Set optimisation level to [number]\n"));
3741 printf (_(" -Os Optimise for space rather than speed\n"));
3742 printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n"));
3743 printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
3744 printf (_(" -w Suppress warnings\n"));
3745 printf (_(" -W Enable extra warnings\n"));
3747 for (i = ARRAY_SIZE (W_options); i--;)
3749 const char *description = W_options[i].description;
3751 if (description != NULL && * description != 0)
3752 printf (" -W%-21s %s\n",
3753 W_options[i].string, description);
3756 printf (_(" -Wunused Enable unused warnings\n"));
3757 printf (_(" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n"));
3758 printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
3759 printf (_(" -p Enable function profiling\n"));
3760 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3761 printf (_(" -a Enable block profiling \n"));
3763 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3764 printf (_(" -ax Enable jump profiling \n"));
3766 printf (_(" -o <file> Place output into <file> \n"));
3768 -G <number> Put global and static data smaller than <number>\n\
3769 bytes into a special section (on some targets)\n"));
3771 for (i = ARRAY_SIZE (debug_args); i--;)
3773 if (debug_args[i].description != NULL)
3774 printf (" -g%-21s %s\n",
3775 debug_args[i].arg, debug_args[i].description);
3778 printf (_(" -aux-info <file> Emit declaration info into <file>.X\n"));
3779 printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
3780 printf (_(" -version Display the compiler's version\n"));
3781 printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
3782 printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
3783 #if defined INSN_SCHEDULING
3784 printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
3786 printf (_(" --help Display this information\n"));
3791 /* Display descriptions of language specific options.
3792 If there is no description, note that there is an undocumented option.
3793 If the description is empty, do not display anything. (This allows
3794 options to be deliberately undocumented, for whatever reason).
3795 If the option string is missing, then this is a marker, indicating
3796 that the description string is in fact the name of a language, whose
3797 language specific options are to follow. */
3799 if (ARRAY_SIZE (documented_lang_options) > 1)
3801 printf (_("\nLanguage specific options:\n"));
3803 for (i = 0; i < ARRAY_SIZE (documented_lang_options); i++)
3805 const char *description = documented_lang_options[i].description;
3806 const char *option = documented_lang_options[i].option;
3808 if (description == NULL)
3813 printf (_(" %-23.23s [undocumented]\n"), option);
3815 else if (*description == 0)
3817 else if (option == NULL)
3821 (_("\nThere are undocumented %s specific options as well.\n"),
3825 printf (_("\n Options for %s:\n"), description);
3830 printf (" %-23.23s %s\n", option, description);
3835 printf (_("\nThere are undocumented %s specific options as well.\n"),
3838 if (ARRAY_SIZE (target_switches) > 1
3839 #ifdef TARGET_OPTIONS
3840 || ARRAY_SIZE (target_options) > 1
3848 printf (_("\nTarget specific options:\n"));
3850 for (i = ARRAY_SIZE (target_switches); i--;)
3852 const char *option = target_switches[i].name;
3853 const char *description = target_switches[i].description;
3855 if (option == NULL || *option == 0)
3857 else if (description == NULL)
3862 printf (_(" -m%-21.21s [undocumented]\n"), option);
3864 else if (* description != 0)
3865 doc += printf (" -m%-21.21s %s\n", option, description);
3868 #ifdef TARGET_OPTIONS
3869 for (i = ARRAY_SIZE (target_options); i--;)
3871 const char *option = target_options[i].prefix;
3872 const char *description = target_options[i].description;
3874 if (option == NULL || *option == 0)
3876 else if (description == NULL)
3881 printf (_(" -m%-21.21s [undocumented]\n"), option);
3883 else if (* description != 0)
3884 doc += printf (" -m%-21.21s %s\n", option, description);
3890 printf (_("\nThere are undocumented target specific options as well.\n"));
3892 printf (_(" They exist, but they are not documented.\n"));
3897 /* Parse a -d... comand line switch. */
3900 decode_d_option (arg)
3909 for (i = 0; i < DFI_MAX; ++i)
3910 dump_file[i].enabled = 1;
3919 flag_print_asm_name = 1;
3922 graph_dump_format = vcg;
3925 rtl_dump_and_exit = 1;
3930 case 'D': /* These are handled by the preprocessor. */
3936 for (i = 0; i < DFI_MAX; ++i)
3937 if (c == dump_file[i].debug_switch)
3939 dump_file[i].enabled = 1;
3944 warning ("unrecognized gcc debugging option: %c", c);
3949 /* Parse a -f... comand line switch. ARG is the value after the -f.
3950 It is safe to access 'ARG - 2' to generate the full switch name.
3951 Return the number of strings consumed. */
3954 decode_f_option (arg)
3958 const char *option_value = NULL;
3960 /* Search for the option in the table of binary f options. */
3961 for (j = ARRAY_SIZE (f_options); j--;)
3963 if (!strcmp (arg, f_options[j].string))
3965 *f_options[j].variable = f_options[j].on_value;
3969 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
3970 && ! strcmp (arg + 3, f_options[j].string))
3972 *f_options[j].variable = ! f_options[j].on_value;
3977 if ((option_value = skip_leading_substring (arg, "inline-limit-"))
3978 || (option_value = skip_leading_substring (arg, "inline-limit=")))
3980 read_integral_parameter (option_value, arg - 2, inline_max_insns);
3981 #ifdef INSN_SCHEDULING
3982 else if ((option_value = skip_leading_substring (arg, "sched-verbose=")))
3983 fix_sched_param ("verbose", option_value);
3985 else if ((option_value = skip_leading_substring (arg, "fixed-")))
3986 fix_register (option_value, 1, 1);
3987 else if ((option_value = skip_leading_substring (arg, "call-used-")))
3988 fix_register (option_value, 0, 1);
3989 else if ((option_value = skip_leading_substring (arg, "call-saved-")))
3990 fix_register (option_value, 0, 0);
3991 else if ((option_value = skip_leading_substring (arg, "align-loops=")))
3992 align_loops = read_integral_parameter (option_value, arg - 2, align_loops);
3993 else if ((option_value = skip_leading_substring (arg, "align-functions=")))
3995 = read_integral_parameter (option_value, arg - 2, align_functions);
3996 else if ((option_value = skip_leading_substring (arg, "align-jumps=")))
3997 align_jumps = read_integral_parameter (option_value, arg - 2, align_jumps);
3998 else if ((option_value = skip_leading_substring (arg, "align-labels=")))
4000 = read_integral_parameter (option_value, arg - 2, align_labels);
4001 else if ((option_value
4002 = skip_leading_substring (arg, "stack-limit-register=")))
4004 int reg = decode_reg_name (option_value);
4006 error ("unrecognized register name `%s'", option_value);
4008 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
4010 else if ((option_value
4011 = skip_leading_substring (arg, "stack-limit-symbol=")))
4015 nm = ggc_alloc_string (option_value, strlen (option_value));
4017 nm = xstrdup (option_value);
4018 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
4020 else if ((option_value
4021 = skip_leading_substring (arg, "message-length=")))
4022 diagnostic_message_length_per_line =
4023 read_integral_parameter (option_value, arg - 2,
4024 diagnostic_message_length_per_line);
4025 else if ((option_value
4026 = skip_leading_substring (arg, "diagnostics-show-location=")))
4028 if (!strcmp (option_value, "once"))
4029 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_ONCE);
4030 else if (!strcmp (option_value, "every-line"))
4031 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE);
4033 error ("Unrecognized option `%s'", arg - 2);
4035 else if (!strcmp (arg, "no-stack-limit"))
4036 stack_limit_rtx = NULL_RTX;
4037 else if (!strcmp (arg, "preprocessed"))
4038 /* Recognise this switch but do nothing. This prevents warnings
4039 about an unrecognized switch if cpplib has not been linked in. */
4047 /* Parse a -W... comand line switch. ARG is the value after the -W.
4048 It is safe to access 'ARG - 2' to generate the full switch name.
4049 Return the number of strings consumed. */
4052 decode_W_option (arg)
4055 const char *option_value = NULL;
4058 /* Search for the option in the table of binary W options. */
4060 for (j = ARRAY_SIZE (W_options); j--;)
4062 if (!strcmp (arg, W_options[j].string))
4064 *W_options[j].variable = W_options[j].on_value;
4068 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4069 && ! strcmp (arg + 3, W_options[j].string))
4071 *W_options[j].variable = ! W_options[j].on_value;
4076 if ((option_value = skip_leading_substring (arg, "id-clash-")))
4078 id_clash_len = read_integral_parameter (option_value, arg - 2, -1);
4080 if (id_clash_len != -1)
4083 else if ((option_value = skip_leading_substring (arg, "larger-than-")))
4085 larger_than_size = read_integral_parameter (option_value, arg - 2, -1);
4087 if (larger_than_size != -1)
4088 warn_larger_than = 1;
4090 else if (!strcmp (arg, "unused"))
4094 else if (!strcmp (arg, "no-unused"))
4104 /* Parse a -g... comand line switch. ARG is the value after the -g.
4105 It is safe to access 'ARG - 2' to generate the full switch name.
4106 Return the number of strings consumed. */
4109 decode_g_option (arg)
4113 /* A lot of code assumes write_symbols == NO_DEBUG if the
4114 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4115 of what debugging type has been selected). This records the
4116 selected type. It is an error to specify more than one
4118 static enum debug_info_type selected_debug_type = NO_DEBUG;
4119 /* Non-zero if debugging format has been explicitly set.
4120 -g and -ggdb don't explicitly set the debugging format so
4121 -gdwarf -g3 is equivalent to -gdwarf3. */
4122 static int type_explicitly_set_p = 0;
4123 /* Indexed by enum debug_info_type. */
4124 static const char *debug_type_names[] =
4126 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4129 /* The maximum admissible debug level value. */
4130 static const unsigned max_debug_level = 3;
4132 /* Look up ARG in the table. */
4133 for (da = debug_args; da->arg; da++)
4135 const int da_len = strlen (da->arg);
4137 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4139 enum debug_info_type type = da->debug_type;
4140 const char *p = arg + da_len;
4142 if (*p && (*p < '0' || *p > '9'))
4145 /* A debug flag without a level defaults to level 2.
4146 Note we do not want to call read_integral_parameter
4147 for that case since it will call atoi which
4150 ??? We may want to generalize the interface to
4151 read_integral_parameter to better handle this case
4152 if this case shows up often. */
4154 level = read_integral_parameter (p, 0, max_debug_level + 1);
4158 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
4160 error ("use -gdwarf -g%d for DWARF v1, level %d",
4163 error ("use -gdwarf-2 for DWARF v2");
4166 if (level > max_debug_level)
4169 ignoring option `%s' due to invalid debug level specification",
4171 level = debug_info_level;
4174 if (type == NO_DEBUG)
4176 type = PREFERRED_DEBUGGING_TYPE;
4178 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
4180 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4181 type = DWARF2_DEBUG;
4183 #ifdef DBX_DEBUGGING_INFO
4190 if (type == NO_DEBUG)
4191 warning ("`%s': unknown or unsupported -g option", arg - 2);
4193 /* Does it conflict with an already selected type? */
4194 if (type_explicitly_set_p
4195 /* -g/-ggdb don't conflict with anything. */
4196 && da->debug_type != NO_DEBUG
4197 && type != selected_debug_type)
4198 warning ("`%s' ignored, conflicts with `-g%s'",
4199 arg - 2, debug_type_names[(int) selected_debug_type]);
4202 /* If the format has already been set, -g/-ggdb
4203 only change the debug level. */
4204 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4205 /* Don't change debugging type. */
4209 selected_debug_type = type;
4210 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4213 write_symbols = (level == 0
4215 : selected_debug_type);
4216 use_gnu_debug_info_extensions = da->use_extensions_p;
4217 debug_info_level = (enum debug_info_level) level;
4225 warning ("`%s': unknown or unsupported -g option", arg - 2);
4230 /* Decode the first argument in the argv as a language-independent option.
4231 Return the number of strings consumed. */
4234 independent_decode_option (argc, argv)
4238 char *arg = argv[0];
4240 if (arg[0] != '-' || arg[1] == 0)
4252 if (!strcmp (arg, "-help"))
4267 /* Already been treated in main (). Do nothing. */
4271 set_target_switch (arg + 1);
4275 return decode_f_option (arg + 1);
4278 return decode_g_option (arg + 1);
4281 if (!strcmp (arg, "dumpbase"))
4286 dump_base_name = argv[1];
4290 decode_d_option (arg + 1);
4294 if (!strcmp (arg, "pedantic"))
4296 else if (!strcmp (arg, "pedantic-errors"))
4297 flag_pedantic_errors = pedantic = 1;
4298 else if (arg[1] == 0)
4305 if (!strcmp (arg, "quiet"))
4312 if (!strcmp (arg, "version"))
4320 inhibit_warnings = 1;
4329 /* We save the value of warn_uninitialized, since if they put
4330 -Wuninitialized on the command line, we need to generate a
4331 warning about not using it without also specifying -O. */
4332 if (warn_uninitialized != 1)
4333 warn_uninitialized = 2;
4336 return decode_W_option (arg + 1);
4342 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4343 warning ("`-a' option (basic block profile) not supported");
4345 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4348 else if (!strcmp (arg, "ax"))
4350 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4351 warning ("`-ax' option (jump profiling) not supported");
4353 profile_block_flag = (!profile_block_flag
4354 || profile_block_flag == 2) ? 2 : 3;
4357 else if (!strncmp (arg, "aux-info", 8))
4359 flag_gen_aux_info = 1;
4365 aux_info_file_name = argv[1];
4369 aux_info_file_name = arg + 8;
4381 asm_file_name = argv[1];
4396 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4401 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4405 if (g_switch_val == -1)
4409 g_switch_set = TRUE;
4410 g_switch_value = g_switch_val;
4420 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4421 Exit code is 35 if can't open files, 34 if fatal error,
4422 33 if had nonfatal errors, else success. */
4424 extern int main PARAMS ((int, char **));
4434 /* save in case md file wants to emit args as a comment. */
4438 p = argv[0] + strlen (argv[0]);
4439 while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
4443 #ifdef HAVE_LC_MESSAGES
4444 setlocale (LC_MESSAGES, "");
4446 (void) bindtextdomain (PACKAGE, localedir);
4447 (void) textdomain (PACKAGE);
4449 /* Install handler for SIGFPE, which may be received while we do
4450 compile-time floating point arithmetic. */
4451 signal (SIGFPE, float_signal);
4453 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
4455 signal (SIGSEGV, crash_signal);
4458 signal (SIGILL, crash_signal);
4461 signal (SIGBUS, crash_signal);
4464 signal (SIGABRT, crash_signal);
4466 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
4467 signal (SIGIOT, crash_signal);
4470 decl_printable_name = decl_name;
4471 lang_expand_expr = (lang_expand_expr_t) do_abort;
4473 /* Initialize whether `char' is signed. */
4474 flag_signed_char = DEFAULT_SIGNED_CHAR;
4475 #ifdef DEFAULT_SHORT_ENUMS
4476 /* Initialize how much space enums occupy, by default. */
4477 flag_short_enums = DEFAULT_SHORT_ENUMS;
4480 /* Initialize the garbage-collector. */
4482 ggc_add_root (&input_file_stack, 1, sizeof input_file_stack,
4484 ggc_add_rtx_root (&stack_limit_rtx, 1);
4485 ggc_add_tree_root (¤t_function_decl, 1);
4486 ggc_add_tree_root (¤t_function_func_begin_label, 1);
4488 /* Initialize the diagnostics reporting machinery. */
4489 initialize_diagnostics ();
4491 /* Perform language-specific options intialization. */
4492 lang_init_options ();
4494 /* Scan to see what optimization level has been specified. That will
4495 determine the default value of many flags. */
4496 for (i = 1; i < argc; i++)
4498 if (!strcmp (argv[i], "-O"))
4503 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4505 /* Handle -Os, -O2, -O3, -O69, ... */
4506 char *p = &argv[i][2];
4508 if ((p[0] == 's') && (p[1] == 0))
4512 /* Optimizing for size forces optimize to be 2. */
4517 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4518 if (optimize_val != -1)
4520 optimize = optimize_val;
4530 flag_thread_jumps = 1;
4532 flag_delayed_branch = 1;
4534 #ifdef CAN_DEBUG_WITHOUT_FP
4535 flag_omit_frame_pointer = 1;
4541 flag_optimize_sibling_calls = 1;
4542 flag_cse_follow_jumps = 1;
4543 flag_cse_skip_blocks = 1;
4545 flag_expensive_optimizations = 1;
4546 flag_strength_reduce = 1;
4547 flag_rerun_cse_after_loop = 1;
4548 flag_rerun_loop_opt = 1;
4549 flag_caller_saves = 1;
4552 #ifdef INSN_SCHEDULING
4553 flag_schedule_insns = 1;
4554 flag_schedule_insns_after_reload = 1;
4557 flag_strict_aliasing = 1;
4558 flag_delete_null_pointer_checks = 1;
4563 flag_inline_functions = 1;
4566 if (optimize < 2 || optimize_size)
4571 align_functions = 1;
4574 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4577 set_target_switch ("");
4579 /* Unwind tables are always present in an ABI-conformant IA-64
4580 object file, so the default should be ON. */
4581 #ifdef IA64_UNWIND_INFO
4582 flag_unwind_tables = IA64_UNWIND_INFO;
4585 #ifdef OPTIMIZATION_OPTIONS
4586 /* Allow default optimizations to be specified on a per-machine basis. */
4587 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4590 /* Initialize register usage now so switches may override. */
4593 /* Perform normal command line switch decoding. */
4594 for (i = 1; i < argc;)
4596 unsigned int lang_processed;
4597 unsigned int indep_processed;
4599 /* Give the language a chance to decode the option for itself. */
4600 lang_processed = lang_decode_option (argc - i, argv + i);
4602 /* Now see if the option also has a language independent meaning.
4603 Some options are both language specific and language independent,
4605 indep_processed = independent_decode_option (argc - i, argv + i);
4607 if (lang_processed || indep_processed)
4608 i += (lang_processed > indep_processed
4609 ? lang_processed : indep_processed);
4612 const char *option = NULL;
4613 const char *lang = NULL;
4616 /* It is possible that the command line switch is not valid for the
4617 current language, but it is valid for another language. In order
4618 to be compatible with previous versions of the compiler (which
4619 did not issue an error message in this case) we check for this
4620 possibility here. If we do find a match, then if extra_warnings
4621 is set we generate a warning message, otherwise we will just
4622 ignore the option. */
4623 for (j = 0; j < ARRAY_SIZE (documented_lang_options); j++)
4625 option = documented_lang_options[j].option;
4628 lang = documented_lang_options[j].description;
4629 else if (! strncmp (argv[i], option, strlen (option)))
4633 if (j != ARRAY_SIZE (documented_lang_options))
4637 warning ("Ignoring command line option '%s'", argv[i]);
4640 (It is valid for %s but not the selected language)", lang);
4644 error ("Unrecognized option `%s'", argv[i]);
4650 /* Reflect any language-specific diagnostic option setting. */
4651 reshape_diagnostic_buffer ();
4653 /* Checker uses the frame pointer. */
4654 if (flag_check_memory_usage)
4655 flag_omit_frame_pointer = 0;
4659 /* Inlining does not work if not optimizing,
4660 so force it not to be done. */
4664 /* The c_decode_option and lang_decode_option functions set
4665 this to `2' if -Wall is used, so we can avoid giving out
4666 lots of errors for people who don't realize what -Wall does. */
4667 if (warn_uninitialized == 1)
4668 warning ("-Wuninitialized is not supported without -O");
4671 #ifdef OVERRIDE_OPTIONS
4672 /* Some machines may reject certain combinations of options. */
4676 if (exceptions_via_longjmp == 2)
4678 #ifdef DWARF2_UNWIND_INFO
4679 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4681 #ifdef IA64_UNWIND_INFO
4682 exceptions_via_longjmp = ! IA64_UNWIND_INFO;
4684 exceptions_via_longjmp = 1;
4689 /* Since each function gets its own handler data, we can't support the
4690 new model currently, since it depend on a specific rethrow label
4691 which is declared at the front of the table, and we can only
4692 have one such symbol in a file. */
4693 #ifdef IA64_UNWIND_INFO
4694 flag_new_exceptions = 0;
4697 /* Set up the align_*_log variables, defaulting them to 1 if they
4698 were still unset. */
4699 if (align_loops <= 0) align_loops = 1;
4700 align_loops_log = floor_log2 (align_loops * 2 - 1);
4701 if (align_jumps <= 0) align_jumps = 1;
4702 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
4703 if (align_labels <= 0) align_labels = 1;
4704 align_labels_log = floor_log2 (align_labels * 2 - 1);
4705 if (align_functions <= 0) align_functions = 1;
4706 align_functions_log = floor_log2 (align_functions * 2 - 1);
4708 if (profile_block_flag == 3)
4710 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4711 profile_block_flag = 2;
4714 /* Unrolling all loops implies that standard loop unrolling must also
4716 if (flag_unroll_all_loops)
4717 flag_unroll_loops = 1;
4718 /* Loop unrolling requires that strength_reduction be on also. Silently
4719 turn on strength reduction here if it isn't already on. Also, the loop
4720 unrolling code assumes that cse will be run after loop, so that must
4721 be turned on also. */
4722 if (flag_unroll_loops)
4724 flag_strength_reduce = 1;
4725 flag_rerun_cse_after_loop = 1;
4728 /* Warn about options that are not supported on this machine. */
4729 #ifndef INSN_SCHEDULING
4730 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4731 warning ("instruction scheduling not supported on this target machine");
4734 if (flag_delayed_branch)
4735 warning ("this target machine does not have delayed branches");
4738 user_label_prefix = USER_LABEL_PREFIX;
4739 if (flag_leading_underscore != -1)
4741 /* If the default prefix is more complicated than "" or "_",
4742 issue a warning and ignore this option. */
4743 if (user_label_prefix[0] == 0 ||
4744 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4746 user_label_prefix = flag_leading_underscore ? "_" : "";
4749 warning ("-f%sleading-underscore not supported on this target machine",
4750 flag_leading_underscore ? "" : "no-");
4753 /* If we are in verbose mode, write out the version and maybe all the
4754 option flags in use. */
4757 print_version (stderr, "");
4759 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4762 compile_file (filename);
4764 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4767 char *lim = (char *) sbrk (0);
4769 fnotice (stderr, "Data size %ld.\n", (long) (lim - (char *) &environ));
4774 system ("ps -l 1>&2");
4777 #endif /* not USG */
4780 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4783 return (FATAL_EXIT_CODE);
4785 return (FATAL_EXIT_CODE);
4786 return (SUCCESS_EXIT_CODE);
4789 /* Decode -m switches. */
4790 /* Decode the switch -mNAME. */
4793 set_target_switch (name)
4797 int valid_target_option = 0;
4799 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
4800 if (!strcmp (target_switches[j].name, name))
4802 if (target_switches[j].value < 0)
4803 target_flags &= ~-target_switches[j].value;
4805 target_flags |= target_switches[j].value;
4806 valid_target_option = 1;
4809 #ifdef TARGET_OPTIONS
4810 if (!valid_target_option)
4811 for (j = 0; j < ARRAY_SIZE (target_options); j++)
4813 int len = strlen (target_options[j].prefix);
4814 if (!strncmp (target_options[j].prefix, name, len))
4816 *target_options[j].variable = name + len;
4817 valid_target_option = 1;
4822 if (!valid_target_option)
4823 error ("Invalid option `%s'", name);
4826 /* Print version information to FILE.
4827 Each line begins with INDENT (for the case where FILE is the
4828 assembler output file). */
4831 print_version (file, indent)
4836 #define __VERSION__ "[?]"
4840 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4842 "%s%s%s version %s (%s) compiled by CC.\n"
4844 , indent, *indent != 0 ? " " : "",
4845 language_string, version_string, TARGET_NAME, __VERSION__);
4848 /* Print an option value and return the adjusted position in the line.
4849 ??? We don't handle error returns from fprintf (disk full); presumably
4850 other code will catch a disk full though. */
4853 print_single_switch (file, pos, max, indent, sep, term, type, name)
4856 const char *indent, *sep, *term, *type, *name;
4858 /* The ultrix fprintf returns 0 on success, so compute the result we want
4859 here since we need it for the following test. */
4860 int len = strlen (sep) + strlen (type) + strlen (name);
4865 fprintf (file, "%s", term);
4870 fprintf (file, "%s", indent);
4871 pos = strlen (indent);
4873 fprintf (file, "%s%s%s", sep, type, name);
4878 /* Print active target switches to FILE.
4879 POS is the current cursor position and MAX is the size of a "line".
4880 Each line begins with INDENT and ends with TERM.
4881 Each switch is separated from the next by SEP. */
4884 print_switch_values (file, pos, max, indent, sep, term)
4887 const char *indent, *sep, *term;
4892 /* Print the options as passed. */
4894 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4895 _("options passed: "), "");
4897 for (p = &save_argv[1]; *p != NULL; p++)
4901 if (strcmp (*p, "-o") == 0)
4907 if (strcmp (*p, "-quiet") == 0)
4909 if (strcmp (*p, "-version") == 0)
4914 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4917 fprintf (file, "%s", term);
4919 /* Print the -f and -m options that have been enabled.
4920 We don't handle language specific options but printing argv
4923 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4924 _("options enabled: "), "");
4926 for (j = 0; j < ARRAY_SIZE (f_options); j++)
4927 if (*f_options[j].variable == f_options[j].on_value)
4928 pos = print_single_switch (file, pos, max, indent, sep, term,
4929 "-f", f_options[j].string);
4931 /* Print target specific options. */
4933 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
4934 if (target_switches[j].name[0] != '\0'
4935 && target_switches[j].value > 0
4936 && ((target_switches[j].value & target_flags)
4937 == target_switches[j].value))
4939 pos = print_single_switch (file, pos, max, indent, sep, term,
4940 "-m", target_switches[j].name);
4943 #ifdef TARGET_OPTIONS
4944 for (j = 0; j < ARRAY_SIZE (target_options); j++)
4945 if (*target_options[j].variable != NULL)
4948 sprintf (prefix, "-m%s", target_options[j].prefix);
4949 pos = print_single_switch (file, pos, max, indent, sep, term,
4950 prefix, *target_options[j].variable);
4954 fprintf (file, "%s", term);
4957 /* Record the beginning of a new source file, named FILENAME. */
4960 debug_start_source_file (filename)
4961 register const char *filename ATTRIBUTE_UNUSED;
4963 #ifdef DBX_DEBUGGING_INFO
4964 if (write_symbols == DBX_DEBUG)
4965 dbxout_start_new_source_file (filename);
4967 #ifdef DWARF_DEBUGGING_INFO
4968 if (debug_info_level == DINFO_LEVEL_VERBOSE
4969 && write_symbols == DWARF_DEBUG)
4970 dwarfout_start_new_source_file (filename);
4971 #endif /* DWARF_DEBUGGING_INFO */
4972 #ifdef DWARF2_DEBUGGING_INFO
4973 if (debug_info_level == DINFO_LEVEL_VERBOSE
4974 && write_symbols == DWARF2_DEBUG)
4975 dwarf2out_start_source_file (filename);
4976 #endif /* DWARF2_DEBUGGING_INFO */
4977 #ifdef SDB_DEBUGGING_INFO
4978 if (write_symbols == SDB_DEBUG)
4979 sdbout_start_new_source_file (filename);
4983 /* Record the resumption of a source file. LINENO is the line number in
4984 the source file we are returning to. */
4987 debug_end_source_file (lineno)
4988 register unsigned lineno ATTRIBUTE_UNUSED;
4990 #ifdef DBX_DEBUGGING_INFO
4991 if (write_symbols == DBX_DEBUG)
4992 dbxout_resume_previous_source_file ();
4994 #ifdef DWARF_DEBUGGING_INFO
4995 if (debug_info_level == DINFO_LEVEL_VERBOSE
4996 && write_symbols == DWARF_DEBUG)
4997 dwarfout_resume_previous_source_file (lineno);
4998 #endif /* DWARF_DEBUGGING_INFO */
4999 #ifdef DWARF2_DEBUGGING_INFO
5000 if (debug_info_level == DINFO_LEVEL_VERBOSE
5001 && write_symbols == DWARF2_DEBUG)
5002 dwarf2out_end_source_file ();
5003 #endif /* DWARF2_DEBUGGING_INFO */
5004 #ifdef SDB_DEBUGGING_INFO
5005 if (write_symbols == SDB_DEBUG)
5006 sdbout_resume_previous_source_file ();
5010 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5011 the tail part of the directive line, i.e. the part which is past the
5012 initial whitespace, #, whitespace, directive-name, whitespace part. */
5015 debug_define (lineno, buffer)
5016 register unsigned lineno ATTRIBUTE_UNUSED;
5017 register char *buffer ATTRIBUTE_UNUSED;
5019 #ifdef DWARF_DEBUGGING_INFO
5020 if (debug_info_level == DINFO_LEVEL_VERBOSE
5021 && write_symbols == DWARF_DEBUG)
5022 dwarfout_define (lineno, buffer);
5023 #endif /* DWARF_DEBUGGING_INFO */
5024 #ifdef DWARF2_DEBUGGING_INFO
5025 if (debug_info_level == DINFO_LEVEL_VERBOSE
5026 && write_symbols == DWARF2_DEBUG)
5027 dwarf2out_define (lineno, buffer);
5028 #endif /* DWARF2_DEBUGGING_INFO */
5031 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5032 the tail part of the directive line, i.e. the part which is past the
5033 initial whitespace, #, whitespace, directive-name, whitespace part. */
5036 debug_undef (lineno, buffer)
5037 register unsigned lineno ATTRIBUTE_UNUSED;
5038 register char *buffer ATTRIBUTE_UNUSED;
5040 #ifdef DWARF_DEBUGGING_INFO
5041 if (debug_info_level == DINFO_LEVEL_VERBOSE
5042 && write_symbols == DWARF_DEBUG)
5043 dwarfout_undef (lineno, buffer);
5044 #endif /* DWARF_DEBUGGING_INFO */
5045 #ifdef DWARF2_DEBUGGING_INFO
5046 if (debug_info_level == DINFO_LEVEL_VERBOSE
5047 && write_symbols == DWARF2_DEBUG)
5048 dwarf2out_undef (lineno, buffer);
5049 #endif /* DWARF2_DEBUGGING_INFO */
5052 /* Returns nonzero if it is appropriate not to emit any debugging
5053 information for BLOCK, because it doesn't contain any instructions.
5054 This may not be the case for blocks containing nested functions, since
5055 we may actually call such a function even though the BLOCK information
5059 debug_ignore_block (block)
5060 tree block ATTRIBUTE_UNUSED;
5062 /* Never delete the BLOCK for the outermost scope
5063 of the function; we can refer to names from
5064 that scope even if the block notes are messed up. */
5065 if (is_body_block (block))
5068 #ifdef DWARF2_DEBUGGING_INFO
5069 if (write_symbols == DWARF2_DEBUG)
5070 return dwarf2out_ignore_block (block);