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 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1124 /* Table of language-specific options. */
1126 static struct lang_opt
1129 const char *description;
1131 documented_lang_options[] =
1133 /* In order not to overload the --help output, the convention
1134 used here is to only describe those options which are not
1135 enabled by default. */
1137 { "-ansi", "Compile just for ISO C89" },
1138 { "-fallow-single-precision",
1139 "Do not promote floats to double if using -traditional" },
1140 { "-std= ", "Determine language standard"},
1142 { "-fsigned-bitfields", "" },
1143 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1144 { "-fno-signed-bitfields", "" },
1145 { "-fno-unsigned-bitfields","" },
1146 { "-fsigned-char", "Make 'char' be signed by default"},
1147 { "-funsigned-char", "Make 'char' be unsigned by default"},
1148 { "-fno-signed-char", "" },
1149 { "-fno-unsigned-char", "" },
1151 { "-ftraditional", "" },
1152 { "-traditional", "Attempt to support traditional K&R style C"},
1153 { "-fnotraditional", "" },
1154 { "-fno-traditional", "" },
1157 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1158 { "-fbuiltin", "" },
1159 { "-fno-builtin", "Do not recognise any built in functions" },
1160 { "-fhosted", "Assume normal C execution environment" },
1161 { "-fno-hosted", "" },
1163 "Assume that standard libraries & main might not exist" },
1164 { "-fno-freestanding", "" },
1165 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1166 { "-fno-cond-mismatch", "" },
1167 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1168 { "-fno-dollars-in-identifiers", "" },
1169 { "-fpreprocessed", "" },
1170 { "-fno-preprocessed", "" },
1171 { "-fshort-double", "Use the same size for double as for float" },
1172 { "-fno-short-double", "" },
1173 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1174 { "-fno-short-enums", "" },
1175 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1176 { "-fno-short-wchar", "" },
1178 { "-Wall", "Enable most warning messages" },
1179 { "-Wbad-function-cast",
1180 "Warn about casting functions to incompatible types" },
1181 { "-Wno-bad-function-cast", "" },
1182 { "-Wmissing-noreturn",
1183 "Warn about functions which might be candidates for attribute noreturn" },
1184 { "-Wno-missing-noreturn", "" },
1185 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1186 { "-Wno-cast-qual", "" },
1187 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1188 { "-Wno-char-subscripts", "" },
1189 { "-Wcomment", "Warn if nested comments are detected" },
1190 { "-Wno-comment", "" },
1191 { "-Wcomments", "Warn if nested comments are detected" },
1192 { "-Wno-comments", "" },
1193 { "-Wconversion", "Warn about possibly confusing type conversions" },
1194 { "-Wno-conversion", "" },
1195 { "-Wformat", "Warn about printf format anomalies" },
1196 { "-Wno-format", "" },
1197 { "-Wimplicit-function-declaration",
1198 "Warn about implicit function declarations" },
1199 { "-Wno-implicit-function-declaration", "" },
1200 { "-Werror-implicit-function-declaration", "" },
1201 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1202 { "-Wno-implicit-int", "" },
1203 { "-Wimplicit", "" },
1204 { "-Wno-implicit", "" },
1205 { "-Wimport", "Warn about the use of the #import directive" },
1206 { "-Wno-import", "" },
1207 { "-Wlong-long","" },
1208 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1209 { "-Wmain", "Warn about suspicious declarations of main" },
1210 { "-Wno-main", "" },
1211 { "-Wmissing-braces",
1212 "Warn about possibly missing braces around initialisers" },
1213 { "-Wno-missing-braces", "" },
1214 { "-Wmissing-declarations",
1215 "Warn about global funcs without previous declarations"},
1216 { "-Wno-missing-declarations", "" },
1217 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1218 { "-Wno-missing-prototypes", "" },
1219 { "-Wmultichar", "Warn about use of multicharacter literals"},
1220 { "-Wno-multichar", "" },
1221 { "-Wnested-externs", "Warn about externs not at file scope level" },
1222 { "-Wno-nested-externs", "" },
1223 { "-Wparentheses", "Warn about possible missing parentheses" },
1224 { "-Wno-parentheses", "" },
1225 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1226 { "-Wno-pointer-arith", "" },
1227 { "-Wredundant-decls",
1228 "Warn about multiple declarations of the same object" },
1229 { "-Wno-redundant-decls", "" },
1230 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1231 { "-Wno-sign-compare", "" },
1232 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1233 { "-Wno-float-equal", "" },
1234 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1235 { "-Wno-unknown-pragmas", "" },
1236 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1237 { "-Wno-strict-prototypes", "" },
1238 { "-Wtraditional", "Warn about constructs whose meaning change in ISO C"},
1239 { "-Wno-traditional", "" },
1240 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1241 { "-Wno-trigraphs", "" },
1243 { "-Wno-undef", "" },
1244 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1245 { "-Wno-write-strings", "" },
1247 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1249 #include "options.h"
1253 /* Here is a table, controlled by the tm.h file, listing each -m switch
1254 and which bits in `target_switches' it should set or clear.
1255 If VALUE is positive, it is bits to set.
1256 If VALUE is negative, -VALUE is bits to clear.
1257 (The sign bit is not used so there is no confusion.) */
1263 const char *description;
1265 target_switches [] = TARGET_SWITCHES;
1267 /* This table is similar, but allows the switch to have a value. */
1269 #ifdef TARGET_OPTIONS
1273 const char **variable;
1274 const char *description;
1276 target_options [] = TARGET_OPTIONS;
1279 /* Options controlling warnings. */
1281 /* Don't print warning messages. -w. */
1283 int inhibit_warnings = 0;
1285 /* Print various extra warnings. -W. */
1287 int extra_warnings = 0;
1289 /* Treat warnings as errors. -Werror. */
1291 int warnings_are_errors = 0;
1293 /* Nonzero to warn about unused variables, functions et.al. */
1295 int warn_unused_function;
1296 int warn_unused_label;
1297 int warn_unused_parameter;
1298 int warn_unused_variable;
1299 int warn_unused_value;
1302 set_Wunused (setting)
1305 warn_unused_function = setting;
1306 warn_unused_label = setting;
1307 /* Unused function parameter warnings are reported when either ``-W
1308 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1309 -Wunused by setting WARN_UNUSED_PARAMETER to -1. */
1311 warn_unused_parameter = 0;
1312 else if (!warn_unused_parameter)
1313 warn_unused_parameter = -1;
1314 warn_unused_variable = setting;
1315 warn_unused_value = setting;
1318 /* Nonzero to warn about code which is never reached. */
1320 int warn_notreached;
1322 /* Nonzero to warn about variables used before they are initialized. */
1324 int warn_uninitialized;
1326 /* Nonzero means warn about all declarations which shadow others. */
1330 /* Warn if a switch on an enum fails to have a case for every enum value. */
1334 /* Nonzero means warn about function definitions that default the return type
1335 or that use a null return and have a return-type other than void. */
1337 int warn_return_type;
1339 /* Nonzero means warn about pointer casts that increase the required
1340 alignment of the target type (and might therefore lead to a crash
1341 due to a misaligned access). */
1343 int warn_cast_align;
1345 /* Nonzero means warn about any identifiers that match in the first N
1346 characters. The value N is in `id_clash_len'. */
1351 /* Nonzero means warn about any objects definitions whose size is larger
1352 than N bytes. Also want about function definitions whose returned
1353 values are larger than N bytes. The value N is in `larger_than_size'. */
1355 int warn_larger_than;
1356 HOST_WIDE_INT larger_than_size;
1358 /* Nonzero means warn if inline function is too large. */
1362 /* Warn if a function returns an aggregate,
1363 since there are often incompatible calling conventions for doing this. */
1365 int warn_aggregate_return;
1367 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1371 /* Warn when gcc pads a structure to an alignment boundary. */
1375 /* Likewise for -W. */
1377 lang_independent_options W_options[] =
1379 {"unused-function", &warn_unused_function, 1, "Warn when a function is unused" },
1380 {"unused-label", &warn_unused_label, 1, "Warn when a label is unused" },
1381 {"unused-parameter", &warn_unused_parameter, 1, "Warn when a function parameter is unused" },
1382 {"unused-variable", &warn_unused_variable, 1, "Warn when a variable is unused" },
1383 {"unused-value", &warn_unused_value, 1, "Warn when an expression value is unused" },
1384 {"error", &warnings_are_errors, 1, ""},
1385 {"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
1386 {"switch", &warn_switch, 1,
1387 "Warn about enumerated switches missing a specific case" },
1388 {"aggregate-return", &warn_aggregate_return, 1,
1389 "Warn about returning structures, unions or arrays" },
1390 {"cast-align", &warn_cast_align, 1,
1391 "Warn about pointer casts which increase alignment" },
1392 {"unreachable-code", &warn_notreached, 1,
1393 "Warn about code that will never be executed" },
1394 {"uninitialized", &warn_uninitialized, 1,
1395 "Warn about unitialized automatic variables"},
1396 {"inline", &warn_inline, 1,
1397 "Warn when an inlined function cannot be inlined"},
1398 {"packed", &warn_packed, 1,
1399 "Warn when the packed attribute has no effect on struct layout"},
1400 {"padded", &warn_padded, 1,
1401 "Warn when padding is required to align struct members"}
1404 /* Output files for assembler code (real compiler output)
1405 and debugging dumps. */
1408 FILE *aux_info_file;
1409 FILE *rtl_dump_file = NULL;
1411 /* Decode the string P as an integral parameter.
1412 If the string is indeed an integer return its numeric value else
1413 issue an Invalid Option error for the option PNAME and return DEFVAL.
1414 If PNAME is zero just return DEFVAL, do not call error. */
1417 read_integral_parameter (p, pname, defval)
1422 const char *endp = p;
1426 if (*endp >= '0' && *endp <= '9')
1435 error ("Invalid option `%s'", pname);
1443 /* This is the default decl_printable_name function. */
1446 decl_name (decl, verbosity)
1448 int verbosity ATTRIBUTE_UNUSED;
1450 return IDENTIFIER_POINTER (DECL_NAME (decl));
1453 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1459 struct file_stack *stack = *(struct file_stack **)p;
1461 /* We're only called for input_file_stack, so we can mark the current
1462 input_filename here as well. */
1463 ggc_mark_string (main_input_filename);
1464 ggc_mark_string (input_filename);
1468 ggc_mark_string (stack->name);
1469 stack = stack->next;
1474 /* This calls abort and is used to avoid problems when abort if a macro.
1475 It is used when we need to pass the address of abort. */
1483 /* When `malloc.c' is compiled with `rcheck' defined,
1484 it calls this function to report clobberage. */
1488 const char *s ATTRIBUTE_UNUSED;
1493 /* Return the logarithm of X, base 2, considering X unsigned,
1494 if X is a power of 2. Otherwise, returns -1.
1496 This should be used via the `exact_log2' macro. */
1500 register unsigned HOST_WIDE_INT x;
1502 register int log = 0;
1503 /* Test for 0 or a power of 2. */
1504 if (x == 0 || x != (x & -x))
1506 while ((x >>= 1) != 0)
1511 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1512 If X is 0, return -1.
1514 This should be used via the floor_log2 macro. */
1518 register unsigned HOST_WIDE_INT x;
1520 register int log = -1;
1527 static int float_handler_set;
1529 jmp_buf float_handler;
1531 /* Signals actually come here. */
1534 float_signal (signo)
1535 /* If this is missing, some compilers complain. */
1536 int signo ATTRIBUTE_UNUSED;
1538 if (float_handled == 0)
1539 crash_signal (signo);
1540 #if defined (USG) || defined (hpux)
1541 /* Re-enable the signal catcher. */
1542 signal (SIGFPE, float_signal);
1545 signal (SIGFPE, float_signal);
1546 longjmp (float_handler, 1);
1549 /* Specify where to longjmp to when a floating arithmetic error happens.
1550 If HANDLER is 0, it means don't handle the errors any more. */
1553 set_float_handler (handler)
1556 float_handled = (handler != 0);
1558 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1560 if (float_handled && ! float_handler_set)
1562 signal (SIGFPE, float_signal);
1563 float_handler_set = 1;
1567 /* This is a wrapper function for code which might elicit an
1568 arithmetic exception. That code should be passed in as a function
1569 pointer FN, and one argument DATA. DATA is usually a struct which
1570 contains the real input and output for function FN. This function
1571 returns 0 (failure) if longjmp was called (i.e. an exception
1572 occured.) It returns 1 (success) otherwise. */
1575 do_float_handler (fn, data)
1576 void (*fn) PARAMS ((PTR));
1583 /* We got here via longjmp () caused by an exception in function
1585 set_float_handler (NULL);
1589 set_float_handler (buf);
1591 set_float_handler (NULL);
1595 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1596 error happens, pushing the previous specification into OLD_HANDLER.
1597 Return an indication of whether there was a previous handler in effect. */
1600 push_float_handler (handler, old_handler)
1601 jmp_buf handler, old_handler;
1603 int was_handled = float_handled;
1607 memcpy ((char *) old_handler, (char *) float_handler,
1608 sizeof (float_handler));
1610 memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
1614 /* Restore the previous specification of whether and where to longjmp to
1615 when a floating arithmetic error happens. */
1618 pop_float_handler (handled, handler)
1622 float_handled = handled;
1624 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1627 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1628 into ICE messages, which is much more user friendly. */
1631 crash_signal (signo)
1632 /* If this is missing, some compilers complain. */
1635 fatal ("Internal error: %s.\n\
1636 Please submit a full bug report.\n\
1637 See %s for instructions.", strsignal (signo), GCCBUGURL);
1640 /* Strip off a legitimate source ending from the input string NAME of
1641 length LEN. Rather than having to know the names used by all of
1642 our front ends, we strip off an ending of a period followed by
1643 up to five characters. (Java uses ".class".) */
1646 strip_off_ending (name, len)
1651 for (i = 2; i < 6 && len > i; i++)
1653 if (name[len - i] == '.')
1655 name[len - i] = '\0';
1661 /* Output a quoted string. */
1664 output_quoted_string (asm_file, string)
1668 #ifdef OUTPUT_QUOTED_STRING
1669 OUTPUT_QUOTED_STRING (asm_file, string);
1673 putc ('\"', asm_file);
1674 while ((c = *string++) != 0)
1676 if (c == '\"' || c == '\\')
1677 putc ('\\', asm_file);
1680 putc ('\"', asm_file);
1684 /* Output a file name in the form wanted by System V. */
1687 output_file_directive (asm_file, input_name)
1689 const char *input_name;
1691 int len = strlen (input_name);
1692 const char *na = input_name + len;
1694 /* NA gets INPUT_NAME sans directory names. */
1695 while (na > input_name)
1697 if (IS_DIR_SEPARATOR (na[-1]))
1702 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1703 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1705 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1706 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1708 fprintf (asm_file, "\t.file\t");
1709 output_quoted_string (asm_file, na);
1710 fputc ('\n', asm_file);
1715 #ifdef ASM_IDENTIFY_LANGUAGE
1716 /* Routine to build language identifier for object file. */
1719 output_lang_identify (asm_out_file)
1722 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1723 char *s = (char *) alloca (len);
1725 sprintf (s, "__gnu_compiled_%s", lang_identify ());
1726 ASM_OUTPUT_LABEL (asm_out_file, s);
1730 /* Routine to open a dump file. Return true if the dump file is enabled. */
1733 open_dump_file (index, decl)
1734 enum dump_file_index index;
1738 const char *open_arg;
1741 if (! dump_file[index].enabled)
1744 timevar_push (TV_DUMP);
1745 if (rtl_dump_file != NULL)
1746 fclose (rtl_dump_file);
1748 sprintf (seq, ".%02d.", index);
1750 if (! dump_file[index].initialized)
1752 /* If we've not initialized the files, do so now. */
1753 if (graph_dump_format != no_graph
1754 && dump_file[index].graph_dump_p)
1756 dump_name = concat (seq, dump_file[index].extension, NULL);
1757 clean_graph_dump_file (dump_base_name, dump_name);
1760 dump_file[index].initialized = 1;
1766 dump_name = concat (dump_base_name, seq,
1767 dump_file[index].extension, NULL);
1769 rtl_dump_file = fopen (dump_name, open_arg);
1770 if (rtl_dump_file == NULL)
1771 pfatal_with_name (dump_name);
1776 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
1777 decl_printable_name (decl, 2));
1779 timevar_pop (TV_DUMP);
1783 /* Routine to close a dump file. */
1786 close_dump_file (index, func, insns)
1787 enum dump_file_index index;
1788 void (*func) PARAMS ((FILE *, rtx));
1791 if (! rtl_dump_file)
1794 timevar_push (TV_DUMP);
1796 && graph_dump_format != no_graph
1797 && dump_file[index].graph_dump_p)
1802 sprintf (seq, ".%02d.", index);
1803 suffix = concat (seq, dump_file[index].extension, NULL);
1804 print_rtl_graph_with_bb (dump_base_name, suffix, insns);
1809 func (rtl_dump_file, insns);
1811 fflush (rtl_dump_file);
1812 fclose (rtl_dump_file);
1814 rtl_dump_file = NULL;
1815 timevar_pop (TV_DUMP);
1818 /* Do any final processing required for the declarations in VEC, of
1819 which there are LEN. We write out inline functions and variables
1820 that have been deferred until this point, but which are required.
1821 Returns non-zero if anything was put out. */
1824 wrapup_global_declarations (vec, len)
1831 int output_something = 0;
1833 for (i = 0; i < len; i++)
1837 /* We're not deferring this any longer. */
1838 DECL_DEFER_OUTPUT (decl) = 0;
1840 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1841 && incomplete_decl_finalize_hook != 0)
1842 (*incomplete_decl_finalize_hook) (decl);
1845 /* Now emit any global variables or functions that we have been
1846 putting off. We need to loop in case one of the things emitted
1847 here references another one which comes earlier in the list. */
1851 for (i = 0; i < len; i++)
1855 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1858 /* Don't write out static consts, unless we still need them.
1860 We also keep static consts if not optimizing (for debugging),
1861 unless the user specified -fno-keep-static-consts.
1862 ??? They might be better written into the debug information.
1863 This is possible when using DWARF.
1865 A language processor that wants static constants to be always
1866 written out (even if it is not used) is responsible for
1867 calling rest_of_decl_compilation itself. E.g. the C front-end
1868 calls rest_of_decl_compilation from finish_decl.
1869 One motivation for this is that is conventional in some
1870 environments to write things like:
1871 static const char rcsid[] = "... version string ...";
1872 intending to force the string to be in the executable.
1874 A language processor that would prefer to have unneeded
1875 static constants "optimized away" would just defer writing
1876 them out until here. E.g. C++ does this, because static
1877 constants are often defined in header files.
1879 ??? A tempting alternative (for both C and C++) would be
1880 to force a constant to be written if and only if it is
1881 defined in a main file, as opposed to an include file. */
1883 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1884 && (! TREE_READONLY (decl)
1885 || TREE_PUBLIC (decl)
1886 || (!optimize && flag_keep_static_consts)
1887 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1890 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1893 if (TREE_CODE (decl) == FUNCTION_DECL
1894 && DECL_INITIAL (decl) != 0
1895 && DECL_SAVED_INSNS (decl) != 0
1896 && (flag_keep_inline_functions
1897 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1898 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1901 temporary_allocation ();
1902 output_inline_function (decl);
1903 permanent_allocation (1);
1908 output_something = 1;
1912 return output_something;
1915 /* Issue appropriate warnings for the global declarations in VEC (of
1916 which there are LEN). Output debugging information for them. */
1919 check_global_declarations (vec, len)
1926 for (i = 0; i < len; i++)
1930 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1931 && ! TREE_ASM_WRITTEN (decl))
1932 /* Cancel the RTL for this decl so that, if debugging info
1933 output for global variables is still to come,
1934 this one will be omitted. */
1935 DECL_RTL (decl) = NULL;
1937 /* Warn about any function
1938 declared static but not defined.
1939 We don't warn about variables,
1940 because many programs have static variables
1941 that exist only to get some text into the object file. */
1942 if (TREE_CODE (decl) == FUNCTION_DECL
1943 && (warn_unused_function
1944 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1945 && DECL_INITIAL (decl) == 0
1946 && DECL_EXTERNAL (decl)
1947 && ! DECL_ARTIFICIAL (decl)
1948 && ! TREE_PUBLIC (decl))
1950 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1951 pedwarn_with_decl (decl,
1952 "`%s' used but never defined");
1954 warning_with_decl (decl,
1955 "`%s' declared `static' but never defined");
1956 /* This symbol is effectively an "extern" declaration now. */
1957 TREE_PUBLIC (decl) = 1;
1958 assemble_external (decl);
1961 /* Warn about static fns or vars defined but not used,
1962 but not about inline functions or static consts
1963 since defining those in header files is normal practice. */
1964 if (((warn_unused_function
1965 && TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
1966 || (warn_unused_variable
1967 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
1968 && ! DECL_IN_SYSTEM_HEADER (decl)
1969 && ! DECL_EXTERNAL (decl)
1970 && ! TREE_PUBLIC (decl)
1971 && ! TREE_USED (decl)
1972 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
1973 /* The TREE_USED bit for file-scope decls
1974 is kept in the identifier, to handle multiple
1975 external decls in different scopes. */
1976 && ! TREE_USED (DECL_NAME (decl)))
1977 warning_with_decl (decl, "`%s' defined but not used");
1979 timevar_push (TV_SYMOUT);
1980 #ifdef SDB_DEBUGGING_INFO
1981 /* The COFF linker can move initialized global vars to the end.
1982 And that can screw up the symbol ordering.
1983 By putting the symbols in that order to begin with,
1984 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1985 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1986 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1987 && ! DECL_EXTERNAL (decl)
1988 && DECL_RTL (decl) != 0)
1989 sdbout_symbol (decl, 0);
1991 /* Output COFF information for non-global
1992 file-scope initialized variables. */
1993 if (write_symbols == SDB_DEBUG
1994 && TREE_CODE (decl) == VAR_DECL
1995 && DECL_INITIAL (decl)
1996 && ! DECL_EXTERNAL (decl)
1997 && DECL_RTL (decl) != 0
1998 && GET_CODE (DECL_RTL (decl)) == MEM)
1999 sdbout_toplevel_data (decl);
2000 #endif /* SDB_DEBUGGING_INFO */
2001 #ifdef DWARF_DEBUGGING_INFO
2002 /* Output DWARF information for file-scope tentative data object
2003 declarations, file-scope (extern) function declarations (which
2004 had no corresponding body) and file-scope tagged type declarations
2005 and definitions which have not yet been forced out. */
2007 if (write_symbols == DWARF_DEBUG
2008 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2009 dwarfout_file_scope_decl (decl, 1);
2011 #ifdef DWARF2_DEBUGGING_INFO
2012 /* Output DWARF2 information for file-scope tentative data object
2013 declarations, file-scope (extern) function declarations (which
2014 had no corresponding body) and file-scope tagged type declarations
2015 and definitions which have not yet been forced out. */
2017 if (write_symbols == DWARF2_DEBUG
2018 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2019 dwarf2out_decl (decl);
2021 timevar_pop (TV_SYMOUT);
2025 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2026 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2027 INPUT_FILENAME and LINENO accordingly. */
2030 push_srcloc (file, line)
2034 struct file_stack *fs;
2036 if (input_file_stack)
2038 input_file_stack->name = input_filename;
2039 input_file_stack->line = lineno;
2042 fs = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2043 fs->name = input_filename = file;
2044 fs->line = lineno = line;
2045 fs->indent_level = 0;
2046 fs->next = input_file_stack;
2047 input_file_stack = fs;
2048 input_file_stack_tick++;
2051 /* Pop the top entry off the stack of presently open source files.
2052 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2058 struct file_stack *fs;
2060 fs = input_file_stack;
2061 input_file_stack = fs->next;
2063 input_file_stack_tick++;
2064 /* The initial souce file is never popped. */
2065 if (!input_file_stack)
2067 input_filename = input_file_stack->name;
2068 lineno = input_file_stack->line;
2071 /* Compile an entire file of output from cpp, named NAME.
2072 Write a file of assembly output and various debugging dumps. */
2080 int name_specified = name != 0;
2082 if (dump_base_name == 0)
2083 dump_base_name = name ? name : "gccdump";
2085 /* Start timing total execution time. */
2088 timevar_start (TV_TOTAL);
2090 /* Initialize data in various passes. */
2094 name = init_parse (name);
2095 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2096 || debug_info_level == DINFO_LEVEL_VERBOSE
2097 || flag_test_coverage
2098 || warn_notreached);
2101 init_decl_processing ();
2107 init_function_once ();
2108 init_stor_layout_once ();
2109 init_varasm_once ();
2111 /* The following initialization functions need to generate rtl, so
2112 provide a dummy function context for them. */
2113 init_dummy_function_start ();
2116 if (flag_caller_saves)
2117 init_caller_save ();
2118 expand_dummy_function_end ();
2120 /* If auxiliary info generation is desired, open the output file.
2121 This goes in the same directory as the source file--unlike
2122 all the other output files. */
2123 if (flag_gen_aux_info)
2125 aux_info_file = fopen (aux_info_file_name, "w");
2126 if (aux_info_file == 0)
2127 pfatal_with_name (aux_info_file_name);
2130 /* Open assembler code output file. */
2132 if (flag_syntax_only)
2133 asm_out_file = NULL;
2136 if (! name_specified && asm_file_name == 0)
2137 asm_out_file = stdout;
2140 if (asm_file_name == 0)
2142 int len = strlen (dump_base_name);
2143 char *dumpname = (char *) xmalloc (len + 6);
2144 memcpy (dumpname, dump_base_name, len + 1);
2145 strip_off_ending (dumpname, len);
2146 strcat (dumpname, ".s");
2147 asm_file_name = dumpname;
2149 if (!strcmp (asm_file_name, "-"))
2150 asm_out_file = stdout;
2152 asm_out_file = fopen (asm_file_name, "w");
2153 if (asm_out_file == 0)
2154 pfatal_with_name (asm_file_name);
2157 #ifdef IO_BUFFER_SIZE
2158 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2159 _IOFBF, IO_BUFFER_SIZE);
2163 if (ggc_p && name != 0)
2164 name = ggc_alloc_string (name, strlen (name));
2166 input_filename = name;
2168 /* Put an entry on the input file stack for the main input file. */
2169 push_srcloc (input_filename, 0);
2171 /* Perform language-specific initialization.
2172 This may set main_input_filename. */
2175 /* If the input doesn't start with a #line, use the input name
2176 as the official input file name. */
2177 if (main_input_filename == 0)
2178 main_input_filename = name;
2180 if (flag_syntax_only)
2182 write_symbols = NO_DEBUG;
2184 profile_block_flag = 0;
2188 ASM_FILE_START (asm_out_file);
2190 #ifdef ASM_COMMENT_START
2191 if (flag_verbose_asm)
2193 /* Print the list of options in effect. */
2194 print_version (asm_out_file, ASM_COMMENT_START);
2195 print_switch_values (asm_out_file, 0, MAX_LINE,
2196 ASM_COMMENT_START, " ", "\n");
2197 /* Add a blank line here so it appears in assembler output but not
2199 fprintf (asm_out_file, "\n");
2203 /* Output something to inform GDB that this compilation was by GCC. */
2204 #ifndef ASM_IDENTIFY_GCC
2205 fprintf (asm_out_file, "gcc2_compiled.:\n");
2207 ASM_IDENTIFY_GCC (asm_out_file);
2210 /* Output something to identify which front-end produced this file. */
2211 #ifdef ASM_IDENTIFY_LANGUAGE
2212 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2214 } /* ! flag_syntax_only */
2216 #ifndef ASM_OUTPUT_SECTION_NAME
2217 if (flag_function_sections)
2219 warning ("-ffunction-sections not supported for this target.");
2220 flag_function_sections = 0;
2222 if (flag_data_sections)
2224 warning ("-fdata-sections not supported for this target.");
2225 flag_data_sections = 0;
2229 if (flag_function_sections
2230 && (profile_flag || profile_block_flag))
2232 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2233 flag_function_sections = 0;
2236 #ifndef OBJECT_FORMAT_ELF
2237 if (flag_function_sections && write_symbols != NO_DEBUG)
2238 warning ("-ffunction-sections may affect debugging on some targets.");
2241 /* ??? Note: There used to be a conditional here
2242 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2243 This was to guarantee separation between gcc_compiled. and
2244 the first function, for the sake of dbx on Suns.
2245 However, having the extra zero here confused the Emacs
2246 code for unexec, and might confuse other programs too.
2247 Therefore, I took out that change.
2248 In future versions we should find another way to solve
2249 that dbx problem. -- rms, 23 May 93. */
2251 /* Don't let the first function fall at the same address
2252 as gcc_compiled., if profiling. */
2253 if (profile_flag || profile_block_flag)
2255 /* It's best if we can write a nop here since some
2256 assemblers don't tolerate zeros in the text section. */
2257 output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
2260 /* If dbx symbol table desired, initialize writing it
2261 and output the predefined types. */
2262 timevar_push (TV_SYMOUT);
2263 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2264 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2265 dbxout_init (asm_out_file, main_input_filename, getdecls ());
2267 #ifdef SDB_DEBUGGING_INFO
2268 if (write_symbols == SDB_DEBUG)
2269 sdbout_init (asm_out_file, main_input_filename, getdecls ());
2271 #ifdef DWARF_DEBUGGING_INFO
2272 if (write_symbols == DWARF_DEBUG)
2273 dwarfout_init (asm_out_file, main_input_filename);
2275 #ifdef DWARF2_UNWIND_INFO
2276 if (dwarf2out_do_frame ())
2277 dwarf2out_frame_init ();
2279 #ifdef DWARF2_DEBUGGING_INFO
2280 if (write_symbols == DWARF2_DEBUG)
2281 dwarf2out_init (asm_out_file, main_input_filename);
2283 timevar_pop (TV_SYMOUT);
2285 /* Initialize yet another pass. */
2287 init_final (main_input_filename);
2288 init_branch_prob (dump_base_name);
2290 timevar_push (TV_PARSE);
2292 /* Call the parser, which parses the entire file
2293 (calling rest_of_compilation for each function). */
2295 if (yyparse () != 0)
2297 if (errorcount == 0)
2298 fnotice (stderr, "Errors detected in input file (your bison.simple is out of date)\n");
2300 /* In case there were missing closebraces,
2301 get us back to the global binding level. */
2302 while (! global_bindings_p ())
2306 /* Compilation is now finished except for writing
2307 what's left of the symbol table output. */
2309 timevar_pop (TV_PARSE);
2311 if (flag_syntax_only)
2314 globals = getdecls ();
2316 /* Really define vars that have had only a tentative definition.
2317 Really output inline functions that must actually be callable
2318 and have not been output so far. */
2321 int len = list_length (globals);
2322 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2326 /* Process the decls in reverse order--earliest first.
2327 Put them into VEC from back to front, then take out from front. */
2329 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2330 vec[len - i - 1] = decl;
2332 wrapup_global_declarations (vec, len);
2334 /* This must occur after the loop to output deferred functions. Else
2335 the profiler initializer would not be emitted if all the functions
2336 in this compilation unit were deferred.
2338 output_func_start_profiler can not cause any additional functions or
2339 data to need to be output, so it need not be in the deferred function
2341 output_func_start_profiler ();
2343 /* Now that all possible functions have been output, we can dump
2344 the exception table. */
2346 #ifndef IA64_UNWIND_INFO
2347 output_exception_table ();
2349 free_exception_table ();
2351 check_global_declarations (vec, len);
2357 /* Write out any pending weak symbol declarations. */
2361 /* Do dbx symbols. */
2362 timevar_push (TV_SYMOUT);
2363 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2364 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2365 dbxout_finish (asm_out_file, main_input_filename);
2368 #ifdef DWARF_DEBUGGING_INFO
2369 if (write_symbols == DWARF_DEBUG)
2373 #ifdef DWARF2_UNWIND_INFO
2374 if (dwarf2out_do_frame ())
2375 dwarf2out_frame_finish ();
2378 #ifdef DWARF2_DEBUGGING_INFO
2379 if (write_symbols == DWARF2_DEBUG)
2380 dwarf2out_finish ();
2382 timevar_pop (TV_SYMOUT);
2384 /* Output some stuff at end of file if nec. */
2386 end_final (dump_base_name);
2388 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
2390 timevar_push (TV_DUMP);
2391 open_dump_file (DFI_bp, NULL);
2395 close_dump_file (DFI_bp, NULL, NULL_RTX);
2396 timevar_pop (TV_DUMP);
2400 ASM_FILE_END (asm_out_file);
2403 /* Language-specific end of compilation actions. */
2407 /* Close the dump files. */
2409 if (flag_gen_aux_info)
2411 fclose (aux_info_file);
2413 unlink (aux_info_file_name);
2416 if (optimize > 0 && open_dump_file (DFI_combine, NULL))
2418 timevar_push (TV_DUMP);
2419 dump_combine_total_stats (rtl_dump_file);
2420 close_dump_file (DFI_combine, NULL, NULL_RTX);
2421 timevar_pop (TV_DUMP);
2424 /* Close non-debugging input and output files. Take special care to note
2425 whether fclose returns an error, since the pages might still be on the
2426 buffer chain while the file is open. */
2430 if (! flag_syntax_only
2431 && (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0))
2432 fatal_io_error (asm_file_name);
2434 /* Do whatever is necessary to finish printing the graphs. */
2435 if (graph_dump_format != no_graph)
2439 for (i = 0; i < DFI_MAX; ++i)
2440 if (dump_file[i].initialized && dump_file[i].graph_dump_p)
2445 sprintf (seq, ".%02d.", i);
2446 suffix = concat (seq, dump_file[i].extension, NULL);
2447 finish_graph_dump_file (dump_base_name, suffix);
2452 /* Free up memory for the benefit of leak detectors. */
2455 /* Stop timing total execution time. */
2456 timevar_stop (TV_TOTAL);
2458 /* Print the times. */
2460 timevar_print (stderr);
2463 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2464 and TYPE_DECL nodes.
2466 This does nothing for local (non-static) variables, unless the
2467 variable is a register variable with an ASMSPEC. In that case, or
2468 if the variable is not an automatice, it sets up the RTL and
2469 outputs any assembler code (label definition, storage allocation
2470 and initialization).
2472 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2473 the assembler symbol name to be used. TOP_LEVEL is nonzero
2474 if this declaration is not within a function. */
2477 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2479 const char *asmspec;
2483 /* Declarations of variables, and of functions defined elsewhere. */
2485 /* The most obvious approach, to put an #ifndef around where
2486 this macro is used, doesn't work since it's inside a macro call. */
2487 #ifndef ASM_FINISH_DECLARE_OBJECT
2488 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2491 /* Forward declarations for nested functions are not "external",
2492 but we need to treat them as if they were. */
2493 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2494 || TREE_CODE (decl) == FUNCTION_DECL)
2496 timevar_push (TV_VARCONST);
2497 make_decl_rtl (decl, asmspec, top_level);
2498 /* Initialized extern variable exists to be replaced
2499 with its value, or represents something that will be
2500 output in another file. */
2501 if (! (TREE_CODE (decl) == VAR_DECL
2502 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2503 && DECL_INITIAL (decl) != 0
2504 && DECL_INITIAL (decl) != error_mark_node))
2505 /* Don't output anything
2506 when a tentative file-scope definition is seen.
2507 But at end of compilation, do output code for them. */
2508 if (! (! at_end && top_level
2509 && (DECL_INITIAL (decl) == 0
2510 || DECL_INITIAL (decl) == error_mark_node)))
2511 assemble_variable (decl, top_level, at_end, 0);
2512 if (decl == last_assemble_variable_decl)
2514 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2517 timevar_pop (TV_VARCONST);
2519 else if (DECL_REGISTER (decl) && asmspec != 0)
2521 if (decode_reg_name (asmspec) >= 0)
2523 DECL_RTL (decl) = 0;
2524 make_decl_rtl (decl, asmspec, top_level);
2527 error ("invalid register name `%s' for register variable", asmspec);
2529 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2530 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2531 && TREE_CODE (decl) == TYPE_DECL)
2533 timevar_push (TV_SYMOUT);
2534 dbxout_symbol (decl, 0);
2535 timevar_pop (TV_SYMOUT);
2538 #ifdef SDB_DEBUGGING_INFO
2539 else if (write_symbols == SDB_DEBUG && top_level
2540 && TREE_CODE (decl) == TYPE_DECL)
2542 timevar_push (TV_SYMOUT);
2543 sdbout_symbol (decl, 0);
2544 timevar_pop (TV_SYMOUT);
2549 /* Called after finishing a record, union or enumeral type. */
2552 rest_of_type_compilation (type, toplev)
2553 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2557 tree type ATTRIBUTE_UNUSED;
2558 int toplev ATTRIBUTE_UNUSED;
2561 timevar_push (TV_SYMOUT);
2562 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2563 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2564 dbxout_symbol (TYPE_STUB_DECL (type), !toplev);
2566 #ifdef SDB_DEBUGGING_INFO
2567 if (write_symbols == SDB_DEBUG)
2568 sdbout_symbol (TYPE_STUB_DECL (type), !toplev);
2570 timevar_pop (TV_SYMOUT);
2573 /* DECL is an inline function, whose body is present, but which is not
2574 being output at this point. (We're putting that off until we need
2575 to do it.) If there are any actions that need to take place,
2576 including the emission of debugging information for the function,
2577 this is where they should go. This function may be called by
2578 language-dependent code for front-ends that do not even generate
2579 RTL for functions that don't need to be put out. */
2582 note_deferral_of_defined_inline_function (decl)
2583 tree decl ATTRIBUTE_UNUSED;
2585 #ifdef DWARF_DEBUGGING_INFO
2586 /* Generate the DWARF info for the "abstract" instance of a function
2587 which we may later generate inlined and/or out-of-line instances
2589 if (write_symbols == DWARF_DEBUG && DECL_INLINE (decl))
2591 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2592 DWARF code expects it to be set in this case. Intuitively,
2593 DECL is the function we just finished defining, so setting
2594 CURRENT_FUNCTION_DECL is sensible. */
2595 tree saved_cfd = current_function_decl;
2596 current_function_decl = decl;
2598 /* Let the DWARF code do its work. */
2599 set_decl_abstract_flags (decl, 1);
2600 dwarfout_file_scope_decl (decl, 0);
2601 set_decl_abstract_flags (decl, 0);
2603 /* Reset CURRENT_FUNCTION_DECL. */
2604 current_function_decl = saved_cfd;
2609 /* This is called from finish_function (within yyparse)
2610 after each top-level definition is parsed.
2611 It is supposed to compile that function or variable
2612 and output the assembler code for it.
2613 After we return, the tree storage is freed. */
2616 rest_of_compilation (decl)
2622 int rebuild_label_notes_after_reload;
2623 int register_life_up_to_date;
2625 timevar_push (TV_REST_OF_COMPILATION);
2627 /* When processing delayed functions, prepare_function_start() won't
2628 have been run to re-initialize it. */
2629 cse_not_expected = ! optimize;
2631 /* First, make sure that NOTE_BLOCK is set correctly for each
2632 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2633 if (!cfun->x_whole_function_mode_p)
2636 /* Then remove any notes we don't need. That will make iterating
2637 over the instruction sequence faster, and allow the garbage
2638 collector to reclaim the memory used by the notes. */
2639 remove_unnecessary_notes ();
2641 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2642 tree in sensible shape. So, we just recalculate it here. */
2643 if (cfun->x_whole_function_mode_p)
2646 /* If we are reconsidering an inline function
2647 at the end of compilation, skip the stuff for making it inline. */
2649 if (DECL_SAVED_INSNS (decl) == 0)
2655 /* If this is nested inside an inlined external function, pretend
2656 it was only declared. Since we cannot inline such functions,
2657 generating code for this one is not only not necessary but will
2658 confuse some debugging output writers. */
2659 for (parent = DECL_CONTEXT (current_function_decl);
2660 parent != NULL_TREE;
2661 parent = get_containing_scope (parent))
2662 if (TREE_CODE (parent) == FUNCTION_DECL
2663 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2665 DECL_INITIAL (decl) = 0;
2666 goto exit_rest_of_compilation;
2669 /* If requested, consider whether to make this function inline. */
2670 if (DECL_INLINE (decl) || flag_inline_functions)
2672 timevar_push (TV_INTEGRATION);
2673 lose = function_cannot_inline_p (decl);
2674 timevar_pop (TV_INTEGRATION);
2675 if (lose || ! optimize)
2677 if (warn_inline && DECL_INLINE (decl))
2678 warning_with_decl (decl, lose);
2679 DECL_ABSTRACT_ORIGIN (decl) = 0;
2680 /* Don't really compile an extern inline function.
2681 If we can't make it inline, pretend
2682 it was only declared. */
2683 if (DECL_EXTERNAL (decl))
2685 DECL_INITIAL (decl) = 0;
2686 goto exit_rest_of_compilation;
2690 /* ??? Note that this has the effect of making it look
2691 like "inline" was specified for a function if we choose
2692 to inline it. This isn't quite right, but it's
2693 probably not worth the trouble to fix. */
2694 inlinable = DECL_INLINE (decl) = 1;
2697 insns = get_insns ();
2699 /* Dump the rtl code if we are dumping rtl. */
2701 if (open_dump_file (DFI_rtl, decl))
2703 if (DECL_SAVED_INSNS (decl))
2704 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2705 close_dump_file (DFI_rtl, print_rtl, insns);
2708 /* If function is inline, and we don't yet know whether to
2709 compile it by itself, defer decision till end of compilation.
2710 finish_compilation will call rest_of_compilation again
2711 for those functions that need to be output. Also defer those
2712 functions that we are supposed to defer. */
2715 || (DECL_INLINE (decl)
2716 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2717 && ! flag_keep_inline_functions)
2718 || DECL_EXTERNAL (decl))))
2719 DECL_DEFER_OUTPUT (decl) = 1;
2721 if (DECL_INLINE (decl))
2722 /* DWARF wants seperate debugging info for abstract and
2723 concrete instances of all inline functions, including those
2724 declared inline but not inlined, and those inlined even
2725 though they weren't declared inline. Conveniently, that's
2726 what DECL_INLINE means at this point. */
2727 note_deferral_of_defined_inline_function (decl);
2729 if (DECL_DEFER_OUTPUT (decl))
2731 /* If -Wreturn-type, we have to do a bit of compilation.
2732 However, if we just fall through we will call
2733 save_for_inline_copying() which results in excessive
2734 memory use. Instead, we just want to call
2735 jump_optimize() to figure out whether or not we can fall
2736 off the end of the function; we do the minimum amount of
2737 work necessary to make that safe. And, we set optimize
2738 to zero to keep jump_optimize from working too hard. */
2739 if (warn_return_type)
2741 int saved_optimize = optimize;
2743 find_exception_handler_labels ();
2744 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2745 !JUMP_AFTER_REGSCAN);
2746 optimize = saved_optimize;
2749 current_function_nothrow = nothrow_function_p ();
2750 if (current_function_nothrow)
2751 /* Now we know that this can't throw; set the flag for the benefit
2752 of other functions later in this translation unit. */
2753 TREE_NOTHROW (current_function_decl) = 1;
2755 timevar_push (TV_INTEGRATION);
2756 save_for_inline_nocopy (decl);
2757 timevar_pop (TV_INTEGRATION);
2758 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2759 goto exit_rest_of_compilation;
2762 /* If specified extern inline but we aren't inlining it, we are
2763 done. This goes for anything that gets here with DECL_EXTERNAL
2764 set, not just things with DECL_INLINE. */
2765 if (DECL_EXTERNAL (decl))
2766 goto exit_rest_of_compilation;
2769 init_EXPR_INSN_LIST_cache ();
2774 /* Initialize some variables used by the optimizers. */
2775 init_function_for_compilation ();
2777 if (! DECL_DEFER_OUTPUT (decl))
2778 TREE_ASM_WRITTEN (decl) = 1;
2780 /* Now that integrate will no longer see our rtl, we need not distinguish
2781 between the return value of this function and the return value of called
2783 rtx_equal_function_value_matters = 0;
2785 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2786 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2787 goto exit_rest_of_compilation;
2789 /* Emit code to get eh context, if needed. */
2792 /* We may have potential sibling or tail recursion sites. Select one
2793 (of possibly multiple) methods of performing the call. */
2794 if (flag_optimize_sibling_calls)
2796 timevar_push (TV_JUMP);
2797 open_dump_file (DFI_sibling, decl);
2799 optimize_sibling_and_tail_recursive_calls ();
2801 close_dump_file (DFI_sibling, print_rtl, get_insns ());
2802 timevar_pop (TV_JUMP);
2806 /* If we are doing position-independent code generation, now
2807 is the time to output special prologues and epilogues.
2808 We do not want to do this earlier, because it just clutters
2809 up inline functions with meaningless insns. */
2814 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2815 Note that that may have been done above, in save_for_inline_copying.
2816 The call to resume_temporary_allocation near the end of this function
2817 goes back to the usual state of affairs. This must be done after
2818 we've built up any unwinders for exception handling, and done
2819 the FINALIZE_PIC work, if necessary. */
2821 rtl_in_current_obstack ();
2823 insns = get_insns ();
2825 /* Copy any shared structure that should not be shared. */
2826 unshare_all_rtl (current_function_decl, insns);
2828 #ifdef SETJMP_VIA_SAVE_AREA
2829 /* This must be performed before virutal register instantiation. */
2830 if (current_function_calls_alloca)
2831 optimize_save_area_alloca (insns);
2834 /* Instantiate all virtual registers. */
2835 instantiate_virtual_regs (current_function_decl, insns);
2837 /* Find all the EH handlers. */
2838 find_exception_handler_labels ();
2840 open_dump_file (DFI_jump, decl);
2842 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2843 are initialized and to compute whether control can drop off the end
2846 timevar_push (TV_JUMP);
2847 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2848 before jump optimization switches branch directions. */
2849 expected_value_to_br_prob ();
2851 reg_scan (insns, max_reg_num (), 0);
2852 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2853 JUMP_AFTER_REGSCAN);
2855 timevar_pop (TV_JUMP);
2857 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2858 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
2860 close_dump_file (DFI_jump, print_rtl, insns);
2861 goto exit_rest_of_compilation;
2864 timevar_push (TV_JUMP);
2868 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2869 cleanup_cfg (insns);
2871 /* ??? Run if-conversion before delete_null_pointer_checks,
2872 since the later does not preserve the CFG. This should
2873 be changed -- no since converting if's that are going to
2875 timevar_push (TV_IFCVT);
2877 timevar_pop (TV_IFCVT);
2879 /* Try to identify useless null pointer tests and delete them. */
2880 if (flag_delete_null_pointer_checks)
2881 delete_null_pointer_checks (insns);
2884 /* Jump optimization, and the removal of NULL pointer checks, may
2885 have reduced the number of instructions substantially. CSE, and
2886 future passes, allocate arrays whose dimensions involve the
2887 maximum instruction UID, so if we can reduce the maximum UID
2888 we'll save big on memory. */
2889 renumber_insns (rtl_dump_file);
2890 timevar_pop (TV_JUMP);
2892 close_dump_file (DFI_jump, print_rtl, insns);
2897 /* Perform common subexpression elimination.
2898 Nonzero value from `cse_main' means that jumps were simplified
2899 and some code may now be unreachable, so do
2900 jump optimization again. */
2904 open_dump_file (DFI_cse, decl);
2905 timevar_push (TV_CSE);
2907 reg_scan (insns, max_reg_num (), 1);
2909 if (flag_thread_jumps)
2911 timevar_push (TV_JUMP);
2912 thread_jumps (insns, max_reg_num (), 1);
2913 timevar_pop (TV_JUMP);
2916 tem = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
2918 /* If we are not running the second CSE pass, then we are no longer
2919 expecting CSE to be run. */
2920 cse_not_expected = !flag_rerun_cse_after_loop;
2922 if (tem || optimize > 1)
2924 timevar_push (TV_JUMP);
2925 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2926 !JUMP_AFTER_REGSCAN);
2927 timevar_pop (TV_JUMP);
2930 /* Run this after jump optmizations remove all the unreachable code
2931 so that unreachable code will not keep values live. */
2932 delete_trivially_dead_insns (insns, max_reg_num ());
2934 /* Try to identify useless null pointer tests and delete them. */
2935 if (flag_delete_null_pointer_checks)
2937 timevar_push (TV_JUMP);
2938 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2940 cleanup_cfg (insns);
2942 delete_null_pointer_checks (insns);
2943 timevar_pop (TV_JUMP);
2946 /* The second pass of jump optimization is likely to have
2947 removed a bunch more instructions. */
2948 renumber_insns (rtl_dump_file);
2950 timevar_pop (TV_CSE);
2951 close_dump_file (DFI_cse, print_rtl, insns);
2954 open_dump_file (DFI_addressof, decl);
2956 purge_addressof (insns);
2957 reg_scan (insns, max_reg_num (), 1);
2959 close_dump_file (DFI_addressof, print_rtl, insns);
2964 if (optimize > 0 && flag_ssa)
2966 /* Convert to SSA form. */
2968 timevar_push (TV_TO_SSA);
2969 open_dump_file (DFI_ssa, decl);
2971 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2972 cleanup_cfg (insns);
2975 close_dump_file (DFI_ssa, print_rtl_with_bb, insns);
2976 timevar_pop (TV_TO_SSA);
2978 /* The SSA implementation uses basic block numbers in its phi
2979 nodes. Thus, changing the control-flow graph or the basic
2980 blocks, e.g., calling find_basic_blocks () or cleanup_cfg (),
2981 may cause problems. */
2985 /* Remove dead code. */
2987 timevar_push (TV_DEAD_CODE_ELIM);
2988 open_dump_file (DFI_dce, decl);
2990 insns = get_insns ();
2991 eliminate_dead_code();
2993 close_dump_file (DFI_dce, print_rtl_with_bb, insns);
2994 timevar_pop (TV_DEAD_CODE_ELIM);
2997 /* Convert from SSA form. */
2999 timevar_push (TV_FROM_SSA);
3000 open_dump_file (DFI_ussa, decl);
3002 convert_from_ssa ();
3003 /* New registers have been created. Rescan their usage. */
3004 reg_scan (insns, max_reg_num (), 1);
3005 /* Life analysis used in SSA adds log_links but these
3006 shouldn't be there until the flow stage, so clear
3008 clear_log_links (insns);
3010 close_dump_file (DFI_ussa, print_rtl_with_bb, insns);
3011 timevar_pop (TV_FROM_SSA);
3017 /* Perform global cse. */
3019 if (optimize > 0 && flag_gcse)
3021 timevar_push (TV_GCSE);
3022 open_dump_file (DFI_gcse, decl);
3024 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3025 cleanup_cfg (insns);
3026 tem = gcse_main (insns, rtl_dump_file);
3028 /* If gcse altered any jumps, rerun jump optimizations to clean
3032 timevar_push (TV_JUMP);
3033 jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
3034 !JUMP_AFTER_REGSCAN);
3035 timevar_pop (TV_JUMP);
3038 close_dump_file (DFI_gcse, print_rtl, insns);
3039 timevar_pop (TV_GCSE);
3045 /* Move constant computations out of loops. */
3049 timevar_push (TV_LOOP);
3050 open_dump_file (DFI_loop, decl);
3052 if (flag_rerun_loop_opt)
3054 /* We only want to perform unrolling once. */
3056 loop_optimize (insns, rtl_dump_file, 0);
3058 /* The first call to loop_optimize makes some instructions
3059 trivially dead. We delete those instructions now in the
3060 hope that doing so will make the heuristics in loop work
3061 better and possibly speed up compilation. */
3062 delete_trivially_dead_insns (insns, max_reg_num ());
3064 /* The regscan pass is currently necessary as the alias
3065 analysis code depends on this information. */
3066 reg_scan (insns, max_reg_num (), 1);
3068 loop_optimize (insns, rtl_dump_file,
3069 (flag_unroll_loops ? LOOP_UNROLL : 0) | LOOP_BCT);
3071 close_dump_file (DFI_loop, print_rtl, insns);
3072 timevar_pop (TV_LOOP);
3080 timevar_push (TV_CSE2);
3081 open_dump_file (DFI_cse2, decl);
3083 if (flag_rerun_cse_after_loop)
3085 /* Running another jump optimization pass before the second
3086 cse pass sometimes simplifies the RTL enough to allow
3087 the second CSE pass to do a better job. Jump_optimize can change
3088 max_reg_num so we must rerun reg_scan afterwards.
3089 ??? Rework to not call reg_scan so often. */
3090 timevar_push (TV_JUMP);
3092 reg_scan (insns, max_reg_num (), 0);
3093 jump_optimize (insns, !JUMP_CROSS_JUMP,
3094 !JUMP_NOOP_MOVES, JUMP_AFTER_REGSCAN);
3096 timevar_push (TV_IFCVT);
3098 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3099 cleanup_cfg (insns);
3102 timevar_pop(TV_IFCVT);
3104 timevar_pop (TV_JUMP);
3106 reg_scan (insns, max_reg_num (), 0);
3107 tem = cse_main (insns, max_reg_num (), 1, rtl_dump_file);
3111 timevar_push (TV_JUMP);
3112 jump_optimize (insns, !JUMP_CROSS_JUMP,
3113 !JUMP_NOOP_MOVES, !JUMP_AFTER_REGSCAN);
3114 timevar_pop (TV_JUMP);
3118 if (flag_thread_jumps)
3120 /* This pass of jump threading straightens out code
3121 that was kinked by loop optimization. */
3122 timevar_push (TV_JUMP);
3123 reg_scan (insns, max_reg_num (), 0);
3124 thread_jumps (insns, max_reg_num (), 0);
3125 timevar_pop (TV_JUMP);
3128 close_dump_file (DFI_cse2, print_rtl, insns);
3129 timevar_pop (TV_CSE2);
3135 cse_not_expected = 1;
3139 /* Do control and data flow analysis; wrote some of the results to
3142 timevar_push (TV_FLOW);
3143 open_dump_file (DFI_cfg, decl);
3145 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3146 cleanup_cfg (insns);
3148 close_dump_file (DFI_cfg, print_rtl_with_bb, insns);
3150 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3152 timevar_push (TV_BRANCH_PROB);
3153 open_dump_file (DFI_bp, decl);
3157 close_dump_file (DFI_bp, print_rtl_with_bb, insns);
3158 timevar_pop (TV_BRANCH_PROB);
3161 open_dump_file (DFI_life, decl);
3166 /* Discover and record the loop depth at the head of each basic
3167 block. The loop infrastructure does the real job for us. */
3168 flow_loops_find (&loops);
3170 /* Estimate using heuristics if no profiling info is available. */
3171 estimate_probability (&loops);
3174 flow_loops_dump (&loops, rtl_dump_file, 0);
3176 flow_loops_free (&loops);
3178 life_analysis (insns, rtl_dump_file, PROP_FINAL);
3179 mark_constant_function ();
3180 timevar_pop (TV_FLOW);
3182 register_life_up_to_date = 1;
3185 if (warn_uninitialized || extra_warnings)
3187 uninitialized_vars_warning (DECL_INITIAL (decl));
3189 setjmp_args_warning ();
3192 close_dump_file (DFI_life, print_rtl_with_bb, insns);
3197 /* If -opt, try combining insns through substitution. */
3201 int rebuild_jump_labels_after_combine = 0;
3203 timevar_push (TV_COMBINE);
3204 open_dump_file (DFI_combine, decl);
3206 rebuild_jump_labels_after_combine
3207 = combine_instructions (insns, max_reg_num ());
3209 /* Combining insns may have turned an indirect jump into a
3210 direct jump. Rebuid the JUMP_LABEL fields of jumping
3212 if (rebuild_jump_labels_after_combine)
3214 timevar_push (TV_JUMP);
3215 rebuild_jump_labels (insns);
3216 timevar_pop (TV_JUMP);
3218 timevar_push (TV_FLOW);
3219 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3220 cleanup_cfg (insns);
3222 /* Blimey. We've got to have the CFG up to date for the call to
3223 if_convert below. However, the random deletion of blocks
3224 without updating life info can wind up with Wierd Stuff in
3225 global_live_at_end. We then run sched1, which updates things
3226 properly, discovers the wierdness and aborts. */
3227 update_life_info (NULL, UPDATE_LIFE_GLOBAL_RM_NOTES,
3228 PROP_DEATH_NOTES | PROP_KILL_DEAD_CODE
3229 | PROP_SCAN_DEAD_CODE);
3231 timevar_pop (TV_FLOW);
3234 close_dump_file (DFI_combine, print_rtl_with_bb, insns);
3235 timevar_pop (TV_COMBINE);
3241 /* Rerun if-conversion, as combine may have simplified things enough to
3242 now meet sequence length restrictions. */
3245 timevar_push (TV_IFCVT);
3246 open_dump_file (DFI_ce, decl);
3252 close_dump_file (DFI_ce, print_rtl_with_bb, insns);
3253 timevar_pop (TV_IFCVT);
3256 /* Register allocation pre-pass, to reduce number of moves
3257 necessary for two-address machines. */
3258 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3260 timevar_push (TV_REGMOVE);
3261 open_dump_file (DFI_regmove, decl);
3263 regmove_optimize (insns, max_reg_num (), rtl_dump_file);
3265 close_dump_file (DFI_regmove, print_rtl_with_bb, insns);
3266 timevar_pop (TV_REGMOVE);
3272 /* Any of the several passes since flow1 will have munged register
3273 lifetime data a bit. */
3275 register_life_up_to_date = 0;
3277 #ifdef OPTIMIZE_MODE_SWITCHING
3280 timevar_push (TV_GCSE);
3282 if (optimize_mode_switching (NULL_PTR))
3284 /* We did work, and so had to regenerate global life information.
3285 Take advantage of this and don't re-recompute register life
3286 information below. */
3287 register_life_up_to_date = 1;
3290 timevar_pop (TV_GCSE);
3294 #ifdef INSN_SCHEDULING
3296 /* Print function header into sched dump now
3297 because doing the sched analysis makes some of the dump. */
3298 if (optimize > 0 && flag_schedule_insns)
3300 timevar_push (TV_SCHED);
3301 open_dump_file (DFI_sched, decl);
3303 /* Do control and data sched analysis,
3304 and write some of the results to dump file. */
3306 schedule_insns (rtl_dump_file);
3308 close_dump_file (DFI_sched, print_rtl_with_bb, insns);
3309 timevar_pop (TV_SCHED);
3314 /* Register lifetime information was updated as part of verifying
3316 register_life_up_to_date = 1;
3320 /* Determine if the current function is a leaf before running reload
3321 since this can impact optimizations done by the prologue and
3322 epilogue thus changing register elimination offsets. */
3323 current_function_is_leaf = leaf_function_p ();
3325 timevar_push (TV_LOCAL_ALLOC);
3326 open_dump_file (DFI_lreg, decl);
3328 /* Allocate pseudo-regs that are used only within 1 basic block.
3330 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3331 jump optimizer after register allocation and reloading are finished. */
3333 if (! register_life_up_to_date)
3334 recompute_reg_usage (insns, ! optimize_size);
3335 regclass (insns, max_reg_num (), rtl_dump_file);
3336 rebuild_label_notes_after_reload = local_alloc ();
3338 timevar_pop (TV_LOCAL_ALLOC);
3340 if (dump_file[DFI_lreg].enabled)
3342 timevar_push (TV_DUMP);
3344 dump_flow_info (rtl_dump_file);
3345 dump_local_alloc (rtl_dump_file);
3347 close_dump_file (DFI_lreg, print_rtl_with_bb, insns);
3348 timevar_pop (TV_DUMP);
3354 timevar_push (TV_GLOBAL_ALLOC);
3355 open_dump_file (DFI_greg, decl);
3357 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3358 pass fixing up any insns that are invalid. */
3361 failure = global_alloc (rtl_dump_file);
3364 build_insn_chain (insns);
3365 failure = reload (insns, 0);
3368 timevar_pop (TV_GLOBAL_ALLOC);
3371 goto exit_rest_of_compilation;
3376 /* Do a very simple CSE pass over just the hard registers. */
3379 timevar_push (TV_RELOAD_CSE_REGS);
3380 reload_cse_regs (insns);
3381 timevar_pop (TV_RELOAD_CSE_REGS);
3384 /* If optimizing, then go ahead and split insns now since we are about
3385 to recompute flow information anyway. */
3387 split_all_insns (0);
3389 /* Register allocation and reloading may have turned an indirect jump into
3390 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3391 jumping instructions. */
3392 if (rebuild_label_notes_after_reload)
3394 timevar_push (TV_JUMP);
3396 rebuild_jump_labels (insns);
3398 timevar_pop (TV_JUMP);
3401 if (dump_file[DFI_greg].enabled)
3403 timevar_push (TV_DUMP);
3405 dump_global_regs (rtl_dump_file);
3407 close_dump_file (DFI_greg, print_rtl_with_bb, insns);
3408 timevar_pop (TV_DUMP);
3411 /* Re-create the death notes which were deleted during reload. */
3412 timevar_push (TV_FLOW2);
3413 open_dump_file (DFI_flow2, decl);
3415 jump_optimize (insns, !JUMP_CROSS_JUMP,
3416 !JUMP_NOOP_MOVES, !JUMP_AFTER_REGSCAN);
3417 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3419 /* On some machines, the prologue and epilogue code, or parts thereof,
3420 can be represented as RTL. Doing so lets us schedule insns between
3421 it and the rest of the code and also allows delayed branch
3422 scheduling to operate in the epilogue. */
3423 thread_prologue_and_epilogue_insns (insns);
3427 cleanup_cfg (insns);
3428 life_analysis (insns, rtl_dump_file, PROP_FINAL);
3430 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3431 even for machines with possibly nonzero RETURN_POPS_ARGS
3432 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3433 push instructions will have popping returns. */
3434 #ifndef PUSH_ROUNDING
3435 if (!ACCUMULATE_OUTGOING_ARGS)
3437 combine_stack_adjustments ();
3443 flow2_completed = 1;
3445 close_dump_file (DFI_flow2, print_rtl_with_bb, insns);
3446 timevar_pop (TV_FLOW2);
3450 timevar_push (TV_IFCVT2);
3451 open_dump_file (DFI_ce2, decl);
3455 close_dump_file (DFI_ce2, print_rtl_with_bb, insns);
3456 timevar_pop (TV_IFCVT2);
3459 #ifdef HAVE_peephole2
3460 if (optimize > 0 && flag_peephole2)
3462 timevar_push (TV_PEEPHOLE2);
3463 open_dump_file (DFI_peephole2, decl);
3465 peephole2_optimize (rtl_dump_file);
3467 close_dump_file (DFI_peephole2, print_rtl_with_bb, insns);
3468 timevar_pop (TV_PEEPHOLE2);
3472 if (optimize > 0 && flag_rename_registers)
3474 timevar_push (TV_RENAME_REGISTERS);
3475 open_dump_file (DFI_rnreg, decl);
3477 regrename_optimize ();
3479 close_dump_file (DFI_rnreg, print_rtl_with_bb, insns);
3480 timevar_pop (TV_RENAME_REGISTERS);
3483 #ifdef INSN_SCHEDULING
3484 if (optimize > 0 && flag_schedule_insns_after_reload)
3486 timevar_push (TV_SCHED2);
3487 open_dump_file (DFI_sched2, decl);
3489 /* Do control and data sched analysis again,
3490 and write some more of the results to dump file. */
3492 schedule_insns (rtl_dump_file);
3494 close_dump_file (DFI_sched2, print_rtl_with_bb, insns);
3495 timevar_pop (TV_SCHED2);
3502 #ifdef LEAF_REGISTERS
3503 current_function_uses_only_leaf_regs
3504 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3507 if (optimize > 0 && flag_reorder_blocks)
3509 timevar_push (TV_REORDER_BLOCKS);
3510 open_dump_file (DFI_bbro, decl);
3512 reorder_basic_blocks ();
3514 close_dump_file (DFI_bbro, print_rtl_with_bb, insns);
3515 timevar_pop (TV_REORDER_BLOCKS);
3518 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3519 Also do cross-jumping this time and delete no-op move insns. */
3523 timevar_push (TV_JUMP);
3524 open_dump_file (DFI_jump2, decl);
3526 jump_optimize (insns, JUMP_CROSS_JUMP, JUMP_NOOP_MOVES,
3527 !JUMP_AFTER_REGSCAN);
3529 /* CFG no longer kept up to date. */
3531 close_dump_file (DFI_jump2, print_rtl_with_bb, insns);
3532 timevar_pop (TV_JUMP);
3535 /* If a machine dependent reorganization is needed, call it. */
3536 #ifdef MACHINE_DEPENDENT_REORG
3537 open_dump_file (DFI_mach, decl);
3539 MACHINE_DEPENDENT_REORG (insns);
3541 close_dump_file (DFI_mach, print_rtl_with_bb, insns);
3547 /* If a scheduling pass for delayed branches is to be done,
3548 call the scheduling code. */
3551 if (optimize > 0 && flag_delayed_branch)
3553 timevar_push (TV_DBR_SCHED);
3554 open_dump_file (DFI_dbr, decl);
3556 dbr_schedule (insns, rtl_dump_file);
3558 close_dump_file (DFI_dbr, print_rtl_with_bb, insns);
3559 timevar_pop (TV_DBR_SCHED);
3566 /* Shorten branches.
3568 Note this must run before reg-stack because of death note (ab)use
3569 in the ia32 backend. */
3570 timevar_push (TV_SHORTEN_BRANCH);
3571 shorten_branches (get_insns ());
3572 timevar_pop (TV_SHORTEN_BRANCH);
3575 timevar_push (TV_REG_STACK);
3576 open_dump_file (DFI_stack, decl);
3578 reg_to_stack (insns, rtl_dump_file);
3580 close_dump_file (DFI_stack, print_rtl_with_bb, insns);
3581 timevar_pop (TV_REG_STACK);
3587 current_function_nothrow = nothrow_function_p ();
3588 if (current_function_nothrow)
3589 /* Now we know that this can't throw; set the flag for the benefit
3590 of other functions later in this translation unit. */
3591 TREE_NOTHROW (current_function_decl) = 1;
3593 /* Now turn the rtl into assembler code. */
3595 timevar_push (TV_FINAL);
3600 /* Get the function's name, as described by its RTL. This may be
3601 different from the DECL_NAME name used in the source file. */
3603 x = DECL_RTL (decl);
3604 if (GET_CODE (x) != MEM)
3607 if (GET_CODE (x) != SYMBOL_REF)
3609 fnname = XSTR (x, 0);
3611 assemble_start_function (decl, fnname);
3612 final_start_function (insns, asm_out_file, optimize);
3613 final (insns, asm_out_file, optimize, 0);
3614 final_end_function (insns, asm_out_file, optimize);
3615 assemble_end_function (decl, fnname);
3617 fflush (asm_out_file);
3619 /* Release all memory allocated by flow. */
3620 free_basic_block_vars (0);
3622 /* Release all memory held by regsets now. */
3623 regset_release_memory ();
3625 timevar_pop (TV_FINAL);
3630 /* Write DBX symbols if requested. */
3632 /* Note that for those inline functions where we don't initially
3633 know for certain that we will be generating an out-of-line copy,
3634 the first invocation of this routine (rest_of_compilation) will
3635 skip over this code by doing a `goto exit_rest_of_compilation;'.
3636 Later on, finish_compilation will call rest_of_compilation again
3637 for those inline functions that need to have out-of-line copies
3638 generated. During that call, we *will* be routed past here. */
3640 timevar_push (TV_SYMOUT);
3641 #ifdef DBX_DEBUGGING_INFO
3642 if (write_symbols == DBX_DEBUG)
3643 dbxout_function (decl);
3646 #ifdef DWARF_DEBUGGING_INFO
3647 if (write_symbols == DWARF_DEBUG)
3648 dwarfout_file_scope_decl (decl, 0);
3651 #ifdef DWARF2_DEBUGGING_INFO
3652 if (write_symbols == DWARF2_DEBUG)
3653 dwarf2out_decl (decl);
3655 timevar_pop (TV_SYMOUT);
3657 exit_rest_of_compilation:
3659 /* In case the function was not output,
3660 don't leave any temporary anonymous types
3661 queued up for sdb output. */
3662 #ifdef SDB_DEBUGGING_INFO
3663 if (write_symbols == SDB_DEBUG)
3664 sdbout_types (NULL_TREE);
3667 reload_completed = 0;
3668 flow2_completed = 0;
3671 timevar_push (TV_FINAL);
3673 /* Clear out the insn_length contents now that they are no
3675 init_insn_lengths ();
3677 /* Clear out the real_constant_chain before some of the rtx's
3678 it runs through become garbage. */
3679 clear_const_double_mem ();
3681 /* Cancel the effect of rtl_in_current_obstack. */
3682 resume_temporary_allocation ();
3684 /* Show no temporary slots allocated. */
3687 free_basic_block_vars (0);
3689 timevar_pop (TV_FINAL);
3691 /* Make sure volatile mem refs aren't considered valid operands for
3692 arithmetic insns. We must call this here if this is a nested inline
3693 function, since the above code leaves us in the init_recog state
3694 (from final.c), and the function context push/pop code does not
3695 save/restore volatile_ok.
3697 ??? Maybe it isn't necessary for expand_start_function to call this
3698 anymore if we do it here? */
3700 init_recog_no_volatile ();
3702 /* We're done with this function. Free up memory if we can. */
3703 free_after_parsing (cfun);
3704 if (! DECL_DEFER_OUTPUT (decl))
3705 free_after_compilation (cfun);
3711 timevar_pop (TV_REST_OF_COMPILATION);
3722 printf (_("Usage: %s input [switches]\n"), progname);
3723 printf (_("Switches:\n"));
3725 printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
3726 printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
3727 printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
3728 printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
3729 printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
3730 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"));
3732 for (i = NUM_ELEM (f_options); i--;)
3734 const char *description = f_options[i].description;
3736 if (description != NULL && * description != 0)
3737 printf (" -f%-21s %s\n",
3738 f_options[i].string, description);
3741 printf (_(" -O[number] Set optimisation level to [number]\n"));
3742 printf (_(" -Os Optimise for space rather than speed\n"));
3743 printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n"));
3744 printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
3745 printf (_(" -w Suppress warnings\n"));
3746 printf (_(" -W Enable extra warnings\n"));
3748 for (i = NUM_ELEM (W_options); i--;)
3750 const char *description = W_options[i].description;
3752 if (description != NULL && * description != 0)
3753 printf (" -W%-21s %s\n",
3754 W_options[i].string, description);
3757 printf (_(" -Wunused Enable unused warnings\n"));
3758 printf (_(" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n"));
3759 printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
3760 printf (_(" -p Enable function profiling\n"));
3761 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3762 printf (_(" -a Enable block profiling \n"));
3764 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3765 printf (_(" -ax Enable jump profiling \n"));
3767 printf (_(" -o <file> Place output into <file> \n"));
3769 -G <number> Put global and static data smaller than <number>\n\
3770 bytes into a special section (on some targets)\n"));
3772 for (i = NUM_ELEM (debug_args); i--;)
3774 if (debug_args[i].description != NULL)
3775 printf (" -g%-21s %s\n",
3776 debug_args[i].arg, debug_args[i].description);
3779 printf (_(" -aux-info <file> Emit declaration info into <file>.X\n"));
3780 printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
3781 printf (_(" -version Display the compiler's version\n"));
3782 printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
3783 printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
3784 #if defined INSN_SCHEDULING
3785 printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
3787 printf (_(" --help Display this information\n"));
3792 /* Display descriptions of language specific options.
3793 If there is no description, note that there is an undocumented option.
3794 If the description is empty, do not display anything. (This allows
3795 options to be deliberately undocumented, for whatever reason).
3796 If the option string is missing, then this is a marker, indicating
3797 that the description string is in fact the name of a language, whose
3798 language specific options are to follow. */
3800 if (NUM_ELEM (documented_lang_options) > 1)
3802 printf (_("\nLanguage specific options:\n"));
3804 for (i = 0; i < NUM_ELEM (documented_lang_options); i++)
3806 const char *description = documented_lang_options[i].description;
3807 const char *option = documented_lang_options[i].option;
3809 if (description == NULL)
3814 printf (_(" %-23.23s [undocumented]\n"), option);
3816 else if (*description == 0)
3818 else if (option == NULL)
3822 (_("\nThere are undocumented %s specific options as well.\n"),
3826 printf (_("\n Options for %s:\n"), description);
3831 printf (" %-23.23s %s\n", option, description);
3836 printf (_("\nThere are undocumented %s specific options as well.\n"),
3839 if (NUM_ELEM (target_switches) > 1
3840 #ifdef TARGET_OPTIONS
3841 || NUM_ELEM (target_options) > 1
3849 printf (_("\nTarget specific options:\n"));
3851 for (i = NUM_ELEM (target_switches); i--;)
3853 const char *option = target_switches[i].name;
3854 const char *description = target_switches[i].description;
3856 if (option == NULL || *option == 0)
3858 else if (description == NULL)
3863 printf (_(" -m%-21.21s [undocumented]\n"), option);
3865 else if (* description != 0)
3866 doc += printf (" -m%-21.21s %s\n", option, description);
3869 #ifdef TARGET_OPTIONS
3870 for (i = NUM_ELEM (target_options); i--;)
3872 const char *option = target_options[i].prefix;
3873 const char *description = target_options[i].description;
3875 if (option == NULL || *option == 0)
3877 else if (description == NULL)
3882 printf (_(" -m%-21.21s [undocumented]\n"), option);
3884 else if (* description != 0)
3885 doc += printf (" -m%-21.21s %s\n", option, description);
3891 printf (_("\nThere are undocumented target specific options as well.\n"));
3893 printf (_(" They exist, but they are not documented.\n"));
3898 /* Parse a -d... comand line switch. */
3901 decode_d_option (arg)
3910 for (i = 0; i < DFI_MAX; ++i)
3911 dump_file[i].enabled = 1;
3920 flag_print_asm_name = 1;
3923 graph_dump_format = vcg;
3926 rtl_dump_and_exit = 1;
3931 case 'D': /* These are handled by the preprocessor. */
3937 for (i = 0; i < DFI_MAX; ++i)
3938 if (c == dump_file[i].debug_switch)
3940 dump_file[i].enabled = 1;
3945 warning ("unrecognized gcc debugging option: %c", c);
3950 /* Parse a -f... comand line switch. ARG is the value after the -f.
3951 It is safe to access 'ARG - 2' to generate the full switch name.
3952 Return the number of strings consumed. */
3955 decode_f_option (arg)
3959 const char *option_value = NULL;
3961 /* Search for the option in the table of binary f options. */
3962 for (j = sizeof (f_options) / sizeof (f_options[0]); j--;)
3964 if (!strcmp (arg, f_options[j].string))
3966 *f_options[j].variable = f_options[j].on_value;
3970 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
3971 && ! strcmp (arg + 3, f_options[j].string))
3973 *f_options[j].variable = ! f_options[j].on_value;
3978 if ((option_value = skip_leading_substring (arg, "inline-limit-"))
3979 || (option_value = skip_leading_substring (arg, "inline-limit=")))
3981 read_integral_parameter (option_value, arg - 2, inline_max_insns);
3982 #ifdef INSN_SCHEDULING
3983 else if ((option_value = skip_leading_substring (arg, "sched-verbose=")))
3984 fix_sched_param ("verbose", option_value);
3986 else if ((option_value = skip_leading_substring (arg, "fixed-")))
3987 fix_register (option_value, 1, 1);
3988 else if ((option_value = skip_leading_substring (arg, "call-used-")))
3989 fix_register (option_value, 0, 1);
3990 else if ((option_value = skip_leading_substring (arg, "call-saved-")))
3991 fix_register (option_value, 0, 0);
3992 else if ((option_value = skip_leading_substring (arg, "align-loops=")))
3993 align_loops = read_integral_parameter (option_value, arg - 2, align_loops);
3994 else if ((option_value = skip_leading_substring (arg, "align-functions=")))
3996 = read_integral_parameter (option_value, arg - 2, align_functions);
3997 else if ((option_value = skip_leading_substring (arg, "align-jumps=")))
3998 align_jumps = read_integral_parameter (option_value, arg - 2, align_jumps);
3999 else if ((option_value = skip_leading_substring (arg, "align-labels=")))
4001 = read_integral_parameter (option_value, arg - 2, align_labels);
4002 else if ((option_value
4003 = skip_leading_substring (arg, "stack-limit-register=")))
4005 int reg = decode_reg_name (option_value);
4007 error ("unrecognized register name `%s'", option_value);
4009 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
4011 else if ((option_value
4012 = skip_leading_substring (arg, "stack-limit-symbol=")))
4016 nm = ggc_alloc_string (option_value, strlen (option_value));
4018 nm = xstrdup (option_value);
4019 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
4021 else if ((option_value
4022 = skip_leading_substring (arg, "message-length=")))
4023 diagnostic_message_length_per_line =
4024 read_integral_parameter (option_value, arg - 2,
4025 diagnostic_message_length_per_line);
4026 else if ((option_value
4027 = skip_leading_substring (arg, "diagnostics-show-location=")))
4029 if (!strcmp (option_value, "once"))
4030 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_ONCE);
4031 else if (!strcmp (option_value, "every-line"))
4032 set_message_prefixing_rule (DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE);
4034 error ("Unrecognized option `%s'", arg - 2);
4036 else if (!strcmp (arg, "no-stack-limit"))
4037 stack_limit_rtx = NULL_RTX;
4038 else if (!strcmp (arg, "preprocessed"))
4039 /* Recognise this switch but do nothing. This prevents warnings
4040 about an unrecognized switch if cpplib has not been linked in. */
4048 /* Parse a -W... comand line switch. ARG is the value after the -W.
4049 It is safe to access 'ARG - 2' to generate the full switch name.
4050 Return the number of strings consumed. */
4053 decode_W_option (arg)
4056 const char *option_value = NULL;
4059 /* Search for the option in the table of binary W options. */
4061 for (j = sizeof (W_options) / sizeof (W_options[0]); j--;)
4063 if (!strcmp (arg, W_options[j].string))
4065 *W_options[j].variable = W_options[j].on_value;
4069 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4070 && ! strcmp (arg + 3, W_options[j].string))
4072 *W_options[j].variable = ! W_options[j].on_value;
4077 if ((option_value = skip_leading_substring (arg, "id-clash-")))
4079 id_clash_len = read_integral_parameter (option_value, arg - 2, -1);
4081 if (id_clash_len != -1)
4084 else if ((option_value = skip_leading_substring (arg, "larger-than-")))
4086 larger_than_size = read_integral_parameter (option_value, arg - 2, -1);
4088 if (larger_than_size != -1)
4089 warn_larger_than = 1;
4091 else if (!strcmp (arg, "unused"))
4095 else if (!strcmp (arg, "no-unused"))
4105 /* Parse a -g... comand line switch. ARG is the value after the -g.
4106 It is safe to access 'ARG - 2' to generate the full switch name.
4107 Return the number of strings consumed. */
4110 decode_g_option (arg)
4114 /* A lot of code assumes write_symbols == NO_DEBUG if the
4115 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4116 of what debugging type has been selected). This records the
4117 selected type. It is an error to specify more than one
4119 static enum debug_info_type selected_debug_type = NO_DEBUG;
4120 /* Non-zero if debugging format has been explicitly set.
4121 -g and -ggdb don't explicitly set the debugging format so
4122 -gdwarf -g3 is equivalent to -gdwarf3. */
4123 static int type_explicitly_set_p = 0;
4124 /* Indexed by enum debug_info_type. */
4125 static const char *debug_type_names[] =
4127 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4130 /* The maximum admissible debug level value. */
4131 static const unsigned max_debug_level = 3;
4133 /* Look up ARG in the table. */
4134 for (da = debug_args; da->arg; da++)
4136 const int da_len = strlen (da->arg);
4138 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4140 enum debug_info_type type = da->debug_type;
4141 const char *p = arg + da_len;
4143 if (*p && (*p < '0' || *p > '9'))
4146 /* A debug flag without a level defaults to level 2.
4147 Note we do not want to call read_integral_parameter
4148 for that case since it will call atoi which
4151 ??? We may want to generalize the interface to
4152 read_integral_parameter to better handle this case
4153 if this case shows up often. */
4155 level = read_integral_parameter (p, 0, max_debug_level + 1);
4159 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
4161 error ("use -gdwarf -g%d for DWARF v1, level %d",
4164 error ("use -gdwarf-2 for DWARF v2");
4167 if (level > max_debug_level)
4170 ignoring option `%s' due to invalid debug level specification",
4172 level = debug_info_level;
4175 if (type == NO_DEBUG)
4177 type = PREFERRED_DEBUGGING_TYPE;
4179 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
4181 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4182 type = DWARF2_DEBUG;
4184 #ifdef DBX_DEBUGGING_INFO
4191 if (type == NO_DEBUG)
4192 warning ("`%s': unknown or unsupported -g option", arg - 2);
4194 /* Does it conflict with an already selected type? */
4195 if (type_explicitly_set_p
4196 /* -g/-ggdb don't conflict with anything. */
4197 && da->debug_type != NO_DEBUG
4198 && type != selected_debug_type)
4199 warning ("`%s' ignored, conflicts with `-g%s'",
4200 arg - 2, debug_type_names[(int) selected_debug_type]);
4203 /* If the format has already been set, -g/-ggdb
4204 only change the debug level. */
4205 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4206 /* Don't change debugging type. */
4210 selected_debug_type = type;
4211 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4214 write_symbols = (level == 0
4216 : selected_debug_type);
4217 use_gnu_debug_info_extensions = da->use_extensions_p;
4218 debug_info_level = (enum debug_info_level) level;
4226 warning ("`%s': unknown or unsupported -g option", arg - 2);
4231 /* Decode the first argument in the argv as a language-independent option.
4232 Return the number of strings consumed. */
4235 independent_decode_option (argc, argv)
4239 char *arg = argv[0];
4241 if (arg[0] != '-' || arg[1] == 0)
4253 if (!strcmp (arg, "-help"))
4268 /* Already been treated in main (). Do nothing. */
4272 set_target_switch (arg + 1);
4276 return decode_f_option (arg + 1);
4279 return decode_g_option (arg + 1);
4282 if (!strcmp (arg, "dumpbase"))
4287 dump_base_name = argv[1];
4291 decode_d_option (arg + 1);
4295 if (!strcmp (arg, "pedantic"))
4297 else if (!strcmp (arg, "pedantic-errors"))
4298 flag_pedantic_errors = pedantic = 1;
4299 else if (arg[1] == 0)
4306 if (!strcmp (arg, "quiet"))
4313 if (!strcmp (arg, "version"))
4321 inhibit_warnings = 1;
4330 /* We save the value of warn_uninitialized, since if they put
4331 -Wuninitialized on the command line, we need to generate a
4332 warning about not using it without also specifying -O. */
4333 if (warn_uninitialized != 1)
4334 warn_uninitialized = 2;
4337 return decode_W_option (arg + 1);
4343 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4344 warning ("`-a' option (basic block profile) not supported");
4346 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4349 else if (!strcmp (arg, "ax"))
4351 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4352 warning ("`-ax' option (jump profiling) not supported");
4354 profile_block_flag = (!profile_block_flag
4355 || profile_block_flag == 2) ? 2 : 3;
4358 else if (!strncmp (arg, "aux-info", 8))
4360 flag_gen_aux_info = 1;
4366 aux_info_file_name = argv[1];
4370 aux_info_file_name = arg + 8;
4382 asm_file_name = argv[1];
4397 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4402 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4406 if (g_switch_val == -1)
4410 g_switch_set = TRUE;
4411 g_switch_value = g_switch_val;
4421 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4422 Exit code is 35 if can't open files, 34 if fatal error,
4423 33 if had nonfatal errors, else success. */
4425 extern int main PARAMS ((int, char **));
4435 /* save in case md file wants to emit args as a comment. */
4439 p = argv[0] + strlen (argv[0]);
4440 while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
4444 #ifdef HAVE_LC_MESSAGES
4445 setlocale (LC_MESSAGES, "");
4447 (void) bindtextdomain (PACKAGE, localedir);
4448 (void) textdomain (PACKAGE);
4450 /* Install handler for SIGFPE, which may be received while we do
4451 compile-time floating point arithmetic. */
4452 signal (SIGFPE, float_signal);
4454 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
4456 signal (SIGSEGV, crash_signal);
4459 signal (SIGILL, crash_signal);
4462 signal (SIGBUS, crash_signal);
4465 signal (SIGABRT, crash_signal);
4467 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
4468 signal (SIGIOT, crash_signal);
4471 decl_printable_name = decl_name;
4472 lang_expand_expr = (lang_expand_expr_t) do_abort;
4474 /* Initialize whether `char' is signed. */
4475 flag_signed_char = DEFAULT_SIGNED_CHAR;
4476 #ifdef DEFAULT_SHORT_ENUMS
4477 /* Initialize how much space enums occupy, by default. */
4478 flag_short_enums = DEFAULT_SHORT_ENUMS;
4481 /* Initialize the garbage-collector. */
4483 ggc_add_root (&input_file_stack, 1, sizeof input_file_stack,
4485 ggc_add_rtx_root (&stack_limit_rtx, 1);
4486 ggc_add_tree_root (¤t_function_decl, 1);
4487 ggc_add_tree_root (¤t_function_func_begin_label, 1);
4489 /* Initialize the diagnostics reporting machinery. */
4490 initialize_diagnostics ();
4492 /* Perform language-specific options intialization. */
4493 lang_init_options ();
4495 /* Scan to see what optimization level has been specified. That will
4496 determine the default value of many flags. */
4497 for (i = 1; i < argc; i++)
4499 if (!strcmp (argv[i], "-O"))
4504 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4506 /* Handle -Os, -O2, -O3, -O69, ... */
4507 char *p = &argv[i][2];
4509 if ((p[0] == 's') && (p[1] == 0))
4513 /* Optimizing for size forces optimize to be 2. */
4518 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4519 if (optimize_val != -1)
4521 optimize = optimize_val;
4531 flag_thread_jumps = 1;
4533 flag_delayed_branch = 1;
4535 #ifdef CAN_DEBUG_WITHOUT_FP
4536 flag_omit_frame_pointer = 1;
4542 flag_optimize_sibling_calls = 1;
4543 flag_cse_follow_jumps = 1;
4544 flag_cse_skip_blocks = 1;
4546 flag_expensive_optimizations = 1;
4547 flag_strength_reduce = 1;
4548 flag_rerun_cse_after_loop = 1;
4549 flag_rerun_loop_opt = 1;
4550 flag_caller_saves = 1;
4553 #ifdef INSN_SCHEDULING
4554 flag_schedule_insns = 1;
4555 flag_schedule_insns_after_reload = 1;
4558 flag_strict_aliasing = 1;
4559 flag_delete_null_pointer_checks = 1;
4564 flag_inline_functions = 1;
4567 if (optimize < 2 || optimize_size)
4572 align_functions = 1;
4575 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4578 set_target_switch ("");
4580 /* Unwind tables are always present in an ABI-conformant IA-64
4581 object file, so the default should be ON. */
4582 #ifdef IA64_UNWIND_INFO
4583 flag_unwind_tables = IA64_UNWIND_INFO;
4586 #ifdef OPTIMIZATION_OPTIONS
4587 /* Allow default optimizations to be specified on a per-machine basis. */
4588 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4591 /* Initialize register usage now so switches may override. */
4594 /* Perform normal command line switch decoding. */
4595 for (i = 1; i < argc;)
4597 unsigned int lang_processed;
4598 unsigned int indep_processed;
4600 /* Give the language a chance to decode the option for itself. */
4601 lang_processed = lang_decode_option (argc - i, argv + i);
4603 /* Now see if the option also has a language independent meaning.
4604 Some options are both language specific and language independent,
4606 indep_processed = independent_decode_option (argc - i, argv + i);
4608 if (lang_processed || indep_processed)
4609 i += (lang_processed > indep_processed
4610 ? lang_processed : indep_processed);
4613 const char *option = NULL;
4614 const char *lang = NULL;
4617 /* It is possible that the command line switch is not valid for the
4618 current language, but it is valid for another language. In order
4619 to be compatible with previous versions of the compiler (which
4620 did not issue an error message in this case) we check for this
4621 possibility here. If we do find a match, then if extra_warnings
4622 is set we generate a warning message, otherwise we will just
4623 ignore the option. */
4624 for (j = 0; j < NUM_ELEM (documented_lang_options); j++)
4626 option = documented_lang_options[j].option;
4629 lang = documented_lang_options[j].description;
4630 else if (! strncmp (argv[i], option, strlen (option)))
4634 if (j != NUM_ELEM (documented_lang_options))
4638 warning ("Ignoring command line option '%s'", argv[i]);
4641 (It is valid for %s but not the selected language)", lang);
4645 error ("Unrecognized option `%s'", argv[i]);
4651 /* Reflect any language-specific diagnostic option setting. */
4652 reshape_diagnostic_buffer ();
4654 /* Checker uses the frame pointer. */
4655 if (flag_check_memory_usage)
4656 flag_omit_frame_pointer = 0;
4660 /* Inlining does not work if not optimizing,
4661 so force it not to be done. */
4665 /* The c_decode_option and lang_decode_option functions set
4666 this to `2' if -Wall is used, so we can avoid giving out
4667 lots of errors for people who don't realize what -Wall does. */
4668 if (warn_uninitialized == 1)
4669 warning ("-Wuninitialized is not supported without -O");
4672 #ifdef OVERRIDE_OPTIONS
4673 /* Some machines may reject certain combinations of options. */
4677 if (exceptions_via_longjmp == 2)
4679 #ifdef DWARF2_UNWIND_INFO
4680 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4682 #ifdef IA64_UNWIND_INFO
4683 exceptions_via_longjmp = ! IA64_UNWIND_INFO;
4685 exceptions_via_longjmp = 1;
4690 /* Since each function gets its own handler data, we can't support the
4691 new model currently, since it depend on a specific rethrow label
4692 which is declared at the front of the table, and we can only
4693 have one such symbol in a file. */
4694 #ifdef IA64_UNWIND_INFO
4695 flag_new_exceptions = 0;
4698 /* Set up the align_*_log variables, defaulting them to 1 if they
4699 were still unset. */
4700 if (align_loops <= 0) align_loops = 1;
4701 align_loops_log = floor_log2 (align_loops * 2 - 1);
4702 if (align_jumps <= 0) align_jumps = 1;
4703 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
4704 if (align_labels <= 0) align_labels = 1;
4705 align_labels_log = floor_log2 (align_labels * 2 - 1);
4706 if (align_functions <= 0) align_functions = 1;
4707 align_functions_log = floor_log2 (align_functions * 2 - 1);
4709 if (profile_block_flag == 3)
4711 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4712 profile_block_flag = 2;
4715 /* Unrolling all loops implies that standard loop unrolling must also
4717 if (flag_unroll_all_loops)
4718 flag_unroll_loops = 1;
4719 /* Loop unrolling requires that strength_reduction be on also. Silently
4720 turn on strength reduction here if it isn't already on. Also, the loop
4721 unrolling code assumes that cse will be run after loop, so that must
4722 be turned on also. */
4723 if (flag_unroll_loops)
4725 flag_strength_reduce = 1;
4726 flag_rerun_cse_after_loop = 1;
4729 /* Warn about options that are not supported on this machine. */
4730 #ifndef INSN_SCHEDULING
4731 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4732 warning ("instruction scheduling not supported on this target machine");
4735 if (flag_delayed_branch)
4736 warning ("this target machine does not have delayed branches");
4739 user_label_prefix = USER_LABEL_PREFIX;
4740 if (flag_leading_underscore != -1)
4742 /* If the default prefix is more complicated than "" or "_",
4743 issue a warning and ignore this option. */
4744 if (user_label_prefix[0] == 0 ||
4745 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4747 user_label_prefix = flag_leading_underscore ? "_" : "";
4750 warning ("-f%sleading-underscore not supported on this target machine",
4751 flag_leading_underscore ? "" : "no-");
4754 /* If we are in verbose mode, write out the version and maybe all the
4755 option flags in use. */
4758 print_version (stderr, "");
4760 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4763 compile_file (filename);
4765 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4768 char *lim = (char *) sbrk (0);
4770 fnotice (stderr, "Data size %ld.\n", (long) (lim - (char *) &environ));
4775 system ("ps -l 1>&2");
4778 #endif /* not USG */
4781 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4784 return (FATAL_EXIT_CODE);
4786 return (FATAL_EXIT_CODE);
4787 return (SUCCESS_EXIT_CODE);
4790 /* Decode -m switches. */
4791 /* Decode the switch -mNAME. */
4794 set_target_switch (name)
4798 int valid_target_option = 0;
4800 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4801 if (!strcmp (target_switches[j].name, name))
4803 if (target_switches[j].value < 0)
4804 target_flags &= ~-target_switches[j].value;
4806 target_flags |= target_switches[j].value;
4807 valid_target_option = 1;
4810 #ifdef TARGET_OPTIONS
4811 if (!valid_target_option)
4812 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4814 int len = strlen (target_options[j].prefix);
4815 if (!strncmp (target_options[j].prefix, name, len))
4817 *target_options[j].variable = name + len;
4818 valid_target_option = 1;
4823 if (!valid_target_option)
4824 error ("Invalid option `%s'", name);
4827 /* Print version information to FILE.
4828 Each line begins with INDENT (for the case where FILE is the
4829 assembler output file). */
4832 print_version (file, indent)
4837 #define __VERSION__ "[?]"
4841 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4843 "%s%s%s version %s (%s) compiled by CC.\n"
4845 , indent, *indent != 0 ? " " : "",
4846 language_string, version_string, TARGET_NAME, __VERSION__);
4849 /* Print an option value and return the adjusted position in the line.
4850 ??? We don't handle error returns from fprintf (disk full); presumably
4851 other code will catch a disk full though. */
4854 print_single_switch (file, pos, max, indent, sep, term, type, name)
4857 const char *indent, *sep, *term, *type, *name;
4859 /* The ultrix fprintf returns 0 on success, so compute the result we want
4860 here since we need it for the following test. */
4861 int len = strlen (sep) + strlen (type) + strlen (name);
4866 fprintf (file, "%s", term);
4871 fprintf (file, "%s", indent);
4872 pos = strlen (indent);
4874 fprintf (file, "%s%s%s", sep, type, name);
4879 /* Print active target switches to FILE.
4880 POS is the current cursor position and MAX is the size of a "line".
4881 Each line begins with INDENT and ends with TERM.
4882 Each switch is separated from the next by SEP. */
4885 print_switch_values (file, pos, max, indent, sep, term)
4888 const char *indent, *sep, *term;
4893 /* Print the options as passed. */
4895 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4896 _("options passed: "), "");
4898 for (p = &save_argv[1]; *p != NULL; p++)
4902 if (strcmp (*p, "-o") == 0)
4908 if (strcmp (*p, "-quiet") == 0)
4910 if (strcmp (*p, "-version") == 0)
4915 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4918 fprintf (file, "%s", term);
4920 /* Print the -f and -m options that have been enabled.
4921 We don't handle language specific options but printing argv
4924 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4925 _("options enabled: "), "");
4927 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
4928 if (*f_options[j].variable == f_options[j].on_value)
4929 pos = print_single_switch (file, pos, max, indent, sep, term,
4930 "-f", f_options[j].string);
4932 /* Print target specific options. */
4934 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4935 if (target_switches[j].name[0] != '\0'
4936 && target_switches[j].value > 0
4937 && ((target_switches[j].value & target_flags)
4938 == target_switches[j].value))
4940 pos = print_single_switch (file, pos, max, indent, sep, term,
4941 "-m", target_switches[j].name);
4944 #ifdef TARGET_OPTIONS
4945 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4946 if (*target_options[j].variable != NULL)
4949 sprintf (prefix, "-m%s", target_options[j].prefix);
4950 pos = print_single_switch (file, pos, max, indent, sep, term,
4951 prefix, *target_options[j].variable);
4955 fprintf (file, "%s", term);
4958 /* Record the beginning of a new source file, named FILENAME. */
4961 debug_start_source_file (filename)
4962 register const char *filename ATTRIBUTE_UNUSED;
4964 #ifdef DBX_DEBUGGING_INFO
4965 if (write_symbols == DBX_DEBUG)
4966 dbxout_start_new_source_file (filename);
4968 #ifdef DWARF_DEBUGGING_INFO
4969 if (debug_info_level == DINFO_LEVEL_VERBOSE
4970 && write_symbols == DWARF_DEBUG)
4971 dwarfout_start_new_source_file (filename);
4972 #endif /* DWARF_DEBUGGING_INFO */
4973 #ifdef DWARF2_DEBUGGING_INFO
4974 if (debug_info_level == DINFO_LEVEL_VERBOSE
4975 && write_symbols == DWARF2_DEBUG)
4976 dwarf2out_start_source_file (filename);
4977 #endif /* DWARF2_DEBUGGING_INFO */
4978 #ifdef SDB_DEBUGGING_INFO
4979 if (write_symbols == SDB_DEBUG)
4980 sdbout_start_new_source_file (filename);
4984 /* Record the resumption of a source file. LINENO is the line number in
4985 the source file we are returning to. */
4988 debug_end_source_file (lineno)
4989 register unsigned lineno ATTRIBUTE_UNUSED;
4991 #ifdef DBX_DEBUGGING_INFO
4992 if (write_symbols == DBX_DEBUG)
4993 dbxout_resume_previous_source_file ();
4995 #ifdef DWARF_DEBUGGING_INFO
4996 if (debug_info_level == DINFO_LEVEL_VERBOSE
4997 && write_symbols == DWARF_DEBUG)
4998 dwarfout_resume_previous_source_file (lineno);
4999 #endif /* DWARF_DEBUGGING_INFO */
5000 #ifdef DWARF2_DEBUGGING_INFO
5001 if (debug_info_level == DINFO_LEVEL_VERBOSE
5002 && write_symbols == DWARF2_DEBUG)
5003 dwarf2out_end_source_file ();
5004 #endif /* DWARF2_DEBUGGING_INFO */
5005 #ifdef SDB_DEBUGGING_INFO
5006 if (write_symbols == SDB_DEBUG)
5007 sdbout_resume_previous_source_file ();
5011 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5012 the tail part of the directive line, i.e. the part which is past the
5013 initial whitespace, #, whitespace, directive-name, whitespace part. */
5016 debug_define (lineno, buffer)
5017 register unsigned lineno ATTRIBUTE_UNUSED;
5018 register char *buffer ATTRIBUTE_UNUSED;
5020 #ifdef DWARF_DEBUGGING_INFO
5021 if (debug_info_level == DINFO_LEVEL_VERBOSE
5022 && write_symbols == DWARF_DEBUG)
5023 dwarfout_define (lineno, buffer);
5024 #endif /* DWARF_DEBUGGING_INFO */
5025 #ifdef DWARF2_DEBUGGING_INFO
5026 if (debug_info_level == DINFO_LEVEL_VERBOSE
5027 && write_symbols == DWARF2_DEBUG)
5028 dwarf2out_define (lineno, buffer);
5029 #endif /* DWARF2_DEBUGGING_INFO */
5032 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5033 the tail part of the directive line, i.e. the part which is past the
5034 initial whitespace, #, whitespace, directive-name, whitespace part. */
5037 debug_undef (lineno, buffer)
5038 register unsigned lineno ATTRIBUTE_UNUSED;
5039 register char *buffer ATTRIBUTE_UNUSED;
5041 #ifdef DWARF_DEBUGGING_INFO
5042 if (debug_info_level == DINFO_LEVEL_VERBOSE
5043 && write_symbols == DWARF_DEBUG)
5044 dwarfout_undef (lineno, buffer);
5045 #endif /* DWARF_DEBUGGING_INFO */
5046 #ifdef DWARF2_DEBUGGING_INFO
5047 if (debug_info_level == DINFO_LEVEL_VERBOSE
5048 && write_symbols == DWARF2_DEBUG)
5049 dwarf2out_undef (lineno, buffer);
5050 #endif /* DWARF2_DEBUGGING_INFO */
5053 /* Returns nonzero if it is appropriate not to emit any debugging
5054 information for BLOCK, because it doesn't contain any instructions.
5055 This may not be the case for blocks containing nested functions, since
5056 we may actually call such a function even though the BLOCK information
5060 debug_ignore_block (block)
5061 tree block ATTRIBUTE_UNUSED;
5063 /* Never delete the BLOCK for the outermost scope
5064 of the function; we can refer to names from
5065 that scope even if the block notes are messed up. */
5066 if (is_body_block (block))
5069 #ifdef DWARF2_DEBUGGING_INFO
5070 if (write_symbols == DWARF2_DEBUG)
5071 return dwarf2out_ignore_block (block);