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"
57 #include "basic-block.h"
64 #ifdef DWARF_DEBUGGING_INFO
68 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
69 #include "dwarf2out.h"
72 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
76 #ifdef SDB_DEBUGGING_INFO
80 #ifdef XCOFF_DEBUGGING_INFO
85 /* The extra parameters substantially improve the I/O performance. */
87 vms_fopen (fname, type)
91 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
92 fixed arguments, which matches ANSI's specification but not VAXCRTL's
93 pre-ANSI implementation. This hack circumvents the mismatch problem. */
94 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
97 return (*vmslib_fopen) (fname, type, "mbc=32",
98 "deq=64", "fop=tef", "shr=nil");
100 return (*vmslib_fopen) (fname, type, "mbc=32");
102 #define fopen vms_fopen
105 #ifndef DEFAULT_GDB_EXTENSIONS
106 #define DEFAULT_GDB_EXTENSIONS 1
109 /* If more than one debugging type is supported, you must define
110 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
112 This is one long line cause VAXC can't handle a \-newline. */
113 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
114 #ifndef PREFERRED_DEBUGGING_TYPE
115 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
116 #endif /* no PREFERRED_DEBUGGING_TYPE */
117 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
118 so the following code needn't care. */
119 #ifdef DBX_DEBUGGING_INFO
120 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
122 #ifdef SDB_DEBUGGING_INFO
123 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
125 #ifdef DWARF_DEBUGGING_INFO
126 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
128 #ifdef DWARF2_DEBUGGING_INFO
129 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
131 #ifdef XCOFF_DEBUGGING_INFO
132 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
134 #endif /* More than one debugger format enabled. */
136 /* If still not defined, must have been because no debugging formats
138 #ifndef PREFERRED_DEBUGGING_TYPE
139 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
142 #ifdef NEED_DECLARATION_ENVIRON
143 extern char **environ;
146 /* Carry information from ASM_DECLARE_OBJECT_NAME
147 to ASM_FINISH_DECLARE_OBJECT. */
149 extern int size_directive_output;
150 extern tree last_assemble_variable_decl;
152 static void set_target_switch PARAMS ((const char *));
153 static const char *decl_name PARAMS ((tree, int));
155 static void float_signal PARAMS ((int)) ATTRIBUTE_NORETURN;
156 static void pipe_closed PARAMS ((int)) ATTRIBUTE_NORETURN;
157 #ifdef ASM_IDENTIFY_LANGUAGE
158 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
159 static void output_lang_identify PARAMS ((FILE *)) ATTRIBUTE_UNUSED;
161 static void open_dump_file PARAMS ((const char *, const char *));
162 static void close_dump_file PARAMS ((void (*) (FILE *, rtx), rtx));
163 static void dump_rtl PARAMS ((const char *, tree, void (*) (FILE *, rtx), rtx));
164 static void clean_dump_file PARAMS ((const char *));
165 static void compile_file PARAMS ((char *));
166 static void display_help PARAMS ((void));
167 static void mark_file_stack PARAMS ((void *));
169 static void decode_d_option PARAMS ((const char *));
170 static int decode_f_option PARAMS ((const char *));
171 static int decode_W_option PARAMS ((const char *));
172 static int decode_g_option PARAMS ((const char *));
173 static unsigned independent_decode_option PARAMS ((int, char **, unsigned));
175 static void print_version PARAMS ((FILE *, const char *));
176 static int print_single_switch PARAMS ((FILE *, int, int, const char *,
177 const char *, const char *,
178 const char *, const char *));
179 static void print_switch_values PARAMS ((FILE *, int, int, const char *,
180 const char *, const char *));
182 /* Length of line when printing switch values. */
185 /* Name of program invoked, sans directories. */
187 const char *progname;
189 /* Copy of arguments to main. */
193 /* Name of current original source file (what was input to cpp).
194 This comes from each #-command in the actual input. */
196 char *input_filename;
198 /* Name of top-level original source file (what was input to cpp).
199 This comes from the #-command at the beginning of the actual input.
200 If there isn't any there, then this is the cc1 input file name. */
202 char *main_input_filename;
204 /* Current line number in real source file. */
208 /* Nonzero if it is unsafe to create any new pseudo registers. */
211 /* Stack of currently pending input files. */
213 struct file_stack *input_file_stack;
215 /* Incremented on each change to input_file_stack. */
216 int input_file_stack_tick;
218 /* Name to use as base of names for dump output files. */
220 const char *dump_base_name;
222 /* Bit flags that specify the machine subtype we are compiling for.
223 Bits are tested using macros TARGET_... defined in the tm.h file
224 and set by `-m...' switches. Must be defined in rtlanal.c. */
226 extern int target_flags;
228 /* Flags saying which kinds of debugging dump have been requested. */
231 int rtl_dump_and_exit = 0;
232 int jump_opt_dump = 0;
233 int addressof_dump = 0;
238 int branch_prob_dump = 0;
240 int combine_dump = 0;
241 int regmove_dump = 0;
243 int local_reg_dump = 0;
244 int global_reg_dump = 0;
246 int peephole2_dump = 0;
248 int jump2_opt_dump = 0;
250 int dbr_sched_dump = 0;
252 int reorder_blocks_dump = 0;
253 int flag_print_asm_name = 0;
255 int stack_reg_dump = 0;
257 #ifdef MACHINE_DEPENDENT_REORG
258 int mach_dep_reorg_dump = 0;
261 static int flag_print_mem = 0;
262 static int version_flag = 0;
263 static char * filename = 0;
264 enum graph_dump_types graph_dump_format;
266 /* Name for output file of assembly code, specified with -o. */
270 /* Value of the -G xx switch, and whether it was passed or not. */
274 /* Type(s) of debugging information we are producing (if any).
275 See flags.h for the definitions of the different possible
276 types of debugging information. */
277 enum debug_info_type write_symbols = NO_DEBUG;
279 /* Level of debugging information we are producing. See flags.h
280 for the definitions of the different possible levels. */
281 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
283 /* Nonzero means use GNU-only extensions in the generated symbolic
284 debugging information. */
285 /* Currently, this only has an effect when write_symbols is set to
286 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
287 int use_gnu_debug_info_extensions = 0;
289 /* Nonzero means do optimizations. -O.
290 Particular numeric values stand for particular amounts of optimization;
291 thus, -O2 stores 2 here. However, the optimizations beyond the basic
292 ones are not controlled directly by this variable. Instead, they are
293 controlled by individual `flag_...' variables that are defaulted
294 based on this variable. */
298 /* Nonzero means optimize for size. -Os.
299 The only valid values are zero and non-zero. When optimize_size is
300 non-zero, optimize defaults to 2, but certain individual code
301 bloating optimizations are disabled. */
303 int optimize_size = 0;
305 /* Number of error messages and warning messages so far. */
308 int warningcount = 0;
311 /* The FUNCTION_DECL for the function currently being compiled,
312 or 0 if between functions. */
313 tree current_function_decl;
315 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
317 tree current_function_func_begin_label;
319 /* Pointer to function to compute the name to use to print a declaration.
320 DECL is the declaration in question.
321 VERBOSITY determines what information will be printed:
322 0: DECL_NAME, demangled as necessary.
323 1: and scope information.
324 2: and any other information that might be interesting, such as function
325 parameter types in C++. */
327 const char *(*decl_printable_name) PARAMS ((tree, int));
329 /* Pointer to function to compute rtl for a language-specific tree code. */
331 typedef rtx (*lang_expand_expr_t)
332 PARAMS ((union tree_node *, rtx, enum machine_mode,
333 enum expand_modifier modifier));
335 lang_expand_expr_t lang_expand_expr = 0;
337 tree (*lang_expand_constant) PARAMS ((tree)) = 0;
339 /* Pointer to function to finish handling an incomplete decl at the
340 end of compilation. */
342 void (*incomplete_decl_finalize_hook) PARAMS ((tree)) = 0;
344 /* Nonzero if generating code to do profiling. */
346 int profile_flag = 0;
348 /* Nonzero if generating code to do profiling on a line-by-line basis. */
350 int profile_block_flag;
352 /* Nonzero if generating code to profile program flow graph arcs. */
354 int profile_arc_flag = 0;
356 /* Nonzero if generating info for gcov to calculate line test coverage. */
358 int flag_test_coverage = 0;
360 /* Nonzero indicates that branch taken probabilities should be calculated. */
362 int flag_branch_probabilities = 0;
364 /* Nonzero if basic blocks should be reordered. */
366 int flag_reorder_blocks = 0;
368 /* Nonzero for -pedantic switch: warn about anything
369 that standard spec forbids. */
373 /* Temporarily suppress certain warnings.
374 This is set while reading code from a system header file. */
376 int in_system_header = 0;
378 /* Don't print functions as they are compiled and don't print
379 times taken by the various passes. -quiet. */
385 /* Nonzero means `char' should be signed. */
387 int flag_signed_char;
389 /* Nonzero means give an enum type only as many bytes as it needs. */
391 int flag_short_enums;
393 /* Nonzero for -fcaller-saves: allocate values in regs that need to
394 be saved across function calls, if that produces overall better code.
395 Optional now, so people can test it. */
397 #ifdef DEFAULT_CALLER_SAVES
398 int flag_caller_saves = 1;
400 int flag_caller_saves = 0;
403 /* Nonzero if structures and unions should be returned in memory.
405 This should only be defined if compatibility with another compiler or
406 with an ABI is needed, because it results in slower code. */
408 #ifndef DEFAULT_PCC_STRUCT_RETURN
409 #define DEFAULT_PCC_STRUCT_RETURN 1
412 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
414 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
416 /* Nonzero for -fforce-mem: load memory value into a register
417 before arithmetic on it. This makes better cse but slower compilation. */
419 int flag_force_mem = 0;
421 /* Nonzero for -fforce-addr: load memory address into a register before
422 reference to memory. This makes better cse but slower compilation. */
424 int flag_force_addr = 0;
426 /* Nonzero for -fdefer-pop: don't pop args after each function call;
427 instead save them up to pop many calls' args with one insns. */
429 int flag_defer_pop = 0;
431 /* Nonzero for -ffloat-store: don't allocate floats and doubles
432 in extended-precision registers. */
434 int flag_float_store = 0;
436 /* Nonzero for -fcse-follow-jumps:
437 have cse follow jumps to do a more extensive job. */
439 int flag_cse_follow_jumps;
441 /* Nonzero for -fcse-skip-blocks:
442 have cse follow a branch around a block. */
443 int flag_cse_skip_blocks;
445 /* Nonzero for -fexpensive-optimizations:
446 perform miscellaneous relatively-expensive optimizations. */
447 int flag_expensive_optimizations;
449 /* Nonzero for -fthread-jumps:
450 have jump optimize output of loop. */
452 int flag_thread_jumps;
454 /* Nonzero enables strength-reduction in loop.c. */
456 int flag_strength_reduce = 0;
458 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
459 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
460 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
463 int flag_unroll_loops;
465 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
466 This is generally not a win. */
468 int flag_unroll_all_loops;
470 /* Nonzero forces all invariant computations in loops to be moved
473 int flag_move_all_movables = 0;
475 /* Nonzero forces all general induction variables in loops to be
478 int flag_reduce_all_givs = 0;
480 /* Nonzero to perform full register move optimization passes. This is the
483 int flag_regmove = 0;
485 /* Nonzero for -fwritable-strings:
486 store string constants in data segment and don't uniquize them. */
488 int flag_writable_strings = 0;
490 /* Nonzero means don't put addresses of constant functions in registers.
491 Used for compiling the Unix kernel, where strange substitutions are
492 done on the assembly output. */
494 int flag_no_function_cse = 0;
496 /* Nonzero for -fomit-frame-pointer:
497 don't make a frame pointer in simple functions that don't require one. */
499 int flag_omit_frame_pointer = 0;
501 /* Nonzero means place each function into its own section on those platforms
502 which support arbitrary section names and unlimited numbers of sections. */
504 int flag_function_sections = 0;
506 /* ... and similar for data. */
508 int flag_data_sections = 0;
510 /* Nonzero to inhibit use of define_optimization peephole opts. */
512 int flag_no_peephole = 0;
514 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
515 operations in the interest of optimization. For example it allows
516 GCC to assume arguments to sqrt are nonnegative numbers, allowing
517 faster code for sqrt to be generated. */
519 int flag_fast_math = 0;
521 /* Nonzero means the front end generally wants `errno' maintained by math
522 operations, like built-in SQRT, unless overridden by flag_fast_math. */
524 int flag_errno_math = 1;
526 /* 0 means straightforward implementation of complex divide acceptable.
527 1 means wide ranges of inputs must work for complex divide.
528 2 means C9X-like requirements for complex divide (not yet implemented). */
530 int flag_complex_divide_method = 0;
532 /* Nonzero means all references through pointers are volatile. */
536 /* Nonzero means treat all global and extern variables as volatile. */
538 int flag_volatile_global;
540 /* Nonzero means treat all static variables as volatile. */
542 int flag_volatile_static;
544 /* Nonzero means just do syntax checking; don't output anything. */
546 int flag_syntax_only = 0;
548 /* Nonzero means perform global cse. */
550 static int flag_gcse;
552 /* Nonzero means to use global dataflow analysis to eliminate
553 useless null pointer tests. */
555 static int flag_delete_null_pointer_checks;
557 /* Nonzero means to rerun cse after loop optimization. This increases
558 compilation time about 20% and picks up a few more common expressions. */
560 static int flag_rerun_cse_after_loop;
562 /* Nonzero means to run loop optimizations twice. */
564 int flag_rerun_loop_opt;
566 /* Nonzero for -finline-functions: ok to inline functions that look like
567 good inline candidates. */
569 int flag_inline_functions;
571 /* Nonzero for -fkeep-inline-functions: even if we make a function
572 go inline everywhere, keep its definition around for debugging
575 int flag_keep_inline_functions;
577 /* Nonzero means that functions will not be inlined. */
581 /* Nonzero means that we should emit static const variables
582 regardless of whether or not optimization is turned on. */
584 int flag_keep_static_consts = 1;
586 /* Nonzero means we should be saving declaration info into a .X file. */
588 int flag_gen_aux_info = 0;
590 /* Specified name of aux-info file. */
592 static char *aux_info_file_name;
594 /* Nonzero means make the text shared if supported. */
596 int flag_shared_data;
598 /* Nonzero means schedule into delayed branch slots if supported. */
600 int flag_delayed_branch;
602 /* Nonzero if we are compiling pure (sharable) code.
603 Value is 1 if we are doing reasonable (i.e. simple
604 offset into offset table) pic. Value is 2 if we can
605 only perform register offsets. */
609 /* Nonzero means generate extra code for exception handling and enable
610 exception handling. */
614 /* Nonzero means use the new model for exception handling. Replaces
615 -DNEW_EH_MODEL as a compile option. */
617 int flag_new_exceptions = 1;
619 /* Nonzero means generate frame unwind info table when supported */
621 int flag_unwind_tables = 0;
623 /* Nonzero means don't place uninitialized global data in common storage
628 /* Nonzero means pretend it is OK to examine bits of target floats,
629 even if that isn't true. The resulting code will have incorrect constants,
630 but the same series of instructions that the native compiler would make. */
632 int flag_pretend_float;
634 /* Nonzero means change certain warnings into errors.
635 Usually these are warnings about failure to conform to some standard. */
637 int flag_pedantic_errors = 0;
639 /* flag_schedule_insns means schedule insns within basic blocks (before
641 flag_schedule_insns_after_reload means schedule insns after
644 int flag_schedule_insns = 0;
645 int flag_schedule_insns_after_reload = 0;
647 /* The following flags have effect only for scheduling before register
650 flag_schedule_interblock means schedule insns accross basic blocks.
651 flag_schedule_speculative means allow speculative motion of non-load insns.
652 flag_schedule_speculative_load means allow speculative motion of some
654 flag_schedule_speculative_load_dangerous allows speculative motion of more
657 int flag_schedule_interblock = 1;
658 int flag_schedule_speculative = 1;
659 int flag_schedule_speculative_load = 0;
660 int flag_schedule_speculative_load_dangerous = 0;
662 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
663 by a cheaper branch, on a count register. */
664 int flag_branch_on_count_reg;
666 /* -finhibit-size-directive inhibits output of .size for ELF.
667 This is used only for compiling crtstuff.c,
668 and it may be extended to other effects
669 needed for crtstuff.c on other systems. */
670 int flag_inhibit_size_directive = 0;
672 /* -fverbose-asm causes extra commentary information to be produced in
673 the generated assembly code (to make it more readable). This option
674 is generally only of use to those who actually need to read the
675 generated assembly code (perhaps while debugging the compiler itself).
676 -fno-verbose-asm, the default, causes the extra information
677 to be omitted and is useful when comparing two assembler files. */
679 int flag_verbose_asm = 0;
681 /* -dA causes debug commentary information to be produced in
682 the generated assembly code (to make it more readable). This option
683 is generally only of use to those who actually need to read the
684 generated assembly code (perhaps while debugging the compiler itself).
685 Currently, this switch is only used by dwarfout.c; however, it is intended
686 to be a catchall for printing debug information in the assembler file. */
688 int flag_debug_asm = 0;
690 /* -fgnu-linker specifies use of the GNU linker for initializations.
691 (Or, more generally, a linker that handles initializations.)
692 -fno-gnu-linker says that collect2 will be used. */
694 int flag_gnu_linker = 0;
696 int flag_gnu_linker = 1;
702 /* Tag all structures with __attribute__(packed) */
703 int flag_pack_struct = 0;
705 /* Emit code to check for stack overflow; also may cause large objects
706 to be allocated dynamically. */
707 int flag_stack_check;
709 /* When non-NULL, indicates that whenever space is allocated on the
710 stack, the resulting stack pointer must not pass this
711 address---that is, for stacks that grow downward, the stack pointer
712 must always be greater than or equal to this address; for stacks
713 that grow upward, the stack pointer must be less than this address.
714 At present, the rtx may be either a REG or a SYMBOL_REF, although
715 the support provided depends on the backend. */
718 /* -fcheck-memory-usage causes extra code to be generated in order to check
719 memory accesses. This is used by a detector of bad memory accesses such
721 int flag_check_memory_usage = 0;
723 /* -fprefix-function-name causes function name to be prefixed. This
724 can be used with -fcheck-memory-usage to isolate code compiled with
725 -fcheck-memory-usage. */
726 int flag_prefix_function_name = 0;
728 /* 0 if pointer arguments may alias each other. True in C.
729 1 if pointer arguments may not alias each other but may alias
731 2 if pointer arguments may not alias each other and may not
732 alias global variables. True in Fortran.
733 This defaults to 0 for C. */
734 int flag_argument_noalias = 0;
736 /* Nonzero if we should do (language-dependent) alias analysis.
737 Typically, this analysis will assume that expressions of certain
738 types do not alias expressions of certain other types. Only used
739 if alias analysis (in general) is enabled. */
740 int flag_strict_aliasing = 0;
742 /* Instrument functions with calls at entry and exit, for profiling. */
743 int flag_instrument_function_entry_exit = 0;
745 /* Nonzero means ignore `#ident' directives. 0 means handle them.
746 On SVR4 targets, it also controls whether or not to emit a
747 string identifying the compiler. */
749 int flag_no_ident = 0;
751 /* This will perform a peephole pass before sched2. */
752 int flag_peephole2 = 0;
754 /* -fbounded-pointers causes gcc to compile pointers as composite
755 objects occupying three words: the pointer value, the base address
756 of the referent object, and the address immediately beyond the end
757 of the referent object. The base and extent allow us to perform
758 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
759 int flag_bounded_pointers = 0;
761 /* -fcheck-bounds causes gcc to generate array bounds checks.
762 For C, C++: defaults to value of flag_bounded_pointers.
763 For ObjC: defaults to off.
764 For Java: defaults to on.
765 For Fortran: defaults to off.
766 For CHILL: defaults to off. */
767 int flag_bounds_check = 0;
769 /* If one, renumber instruction UIDs to reduce the number of
770 unused UIDs if there are a lot of instructions. If greater than
771 one, unconditionally renumber instruction UIDs. */
772 int flag_renumber_insns = 1;
774 /* Values of the -falign-* flags: how much to align labels in code.
775 0 means `use default', 1 means `don't align'.
776 For each variable, there is an _log variant which is the power
777 of two not less than the variable, for .align output. */
784 int align_labels_log;
786 int align_functions_log;
788 /* Table of supported debugging formats. */
792 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
793 constant expression, we use NO_DEBUG in its place. */
794 enum debug_info_type debug_type;
795 int use_extensions_p;
796 const char * description;
800 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
801 "Generate default debug format output" },
802 { "gdb", NO_DEBUG, 1, "Generate default extended debug format output" },
803 #ifdef DBX_DEBUGGING_INFO
804 { "stabs", DBX_DEBUG, 0, "Generate STABS format debug output" },
805 { "stabs+", DBX_DEBUG, 1, "Generate extended STABS format debug output" },
807 #ifdef DWARF_DEBUGGING_INFO
808 { "dwarf", DWARF_DEBUG, 0, "Generate DWARF-1 format debug output"},
809 { "dwarf+", DWARF_DEBUG, 1,
810 "Generated extended DWARF-1 format debug output" },
812 #ifdef DWARF2_DEBUGGING_INFO
813 { "dwarf-2", DWARF2_DEBUG, 0, "Enable DWARF-2 debug output" },
815 #ifdef XCOFF_DEBUGGING_INFO
816 { "xcoff", XCOFF_DEBUG, 0, "Generate XCOFF format debug output" },
817 { "xcoff+", XCOFF_DEBUG, 1, "Generate extended XCOFF format debug output" },
819 #ifdef SDB_DEBUGGING_INFO
820 { "coff", SDB_DEBUG, 0, "Generate COFF format debug output" },
830 const char * description;
832 lang_independent_options;
834 /* Add or remove a leading underscore from user symbols. */
835 int flag_leading_underscore = -1;
837 /* The user symbol prefix after having resolved same. */
838 const char *user_label_prefix;
840 /* A default for same. */
841 #ifndef USER_LABEL_PREFIX
842 #define USER_LABEL_PREFIX ""
845 /* Table of language-independent -f options.
846 STRING is the option name. VARIABLE is the address of the variable.
847 ON_VALUE is the value to store in VARIABLE
848 if `-fSTRING' is seen as an option.
849 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
851 lang_independent_options f_options[] =
853 {"float-store", &flag_float_store, 1,
854 "Do not store floats in registers" },
855 {"volatile", &flag_volatile, 1,
856 "Consider all mem refs through pointers as volatile"},
857 {"volatile-global", &flag_volatile_global, 1,
858 "Consider all mem refs to global data to be volatile" },
859 {"volatile-static", &flag_volatile_static, 1,
860 "Consider all mem refs to static data to be volatile" },
861 {"defer-pop", &flag_defer_pop, 1,
862 "Defer popping functions args from stack until later" },
863 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
864 "When possible do not generate stack frames"},
865 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
866 "When running CSE, follow jumps to their targets" },
867 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
868 "When running CSE, follow conditional jumps" },
869 {"expensive-optimizations", &flag_expensive_optimizations, 1,
870 "Perform a number of minor, expensive optimisations" },
871 {"thread-jumps", &flag_thread_jumps, 1,
872 "Perform jump threading optimisations"},
873 {"strength-reduce", &flag_strength_reduce, 1,
874 "Perform strength reduction optimisations" },
875 {"unroll-loops", &flag_unroll_loops, 1,
876 "Perform loop unrolling when iteration count is known" },
877 {"unroll-all-loops", &flag_unroll_all_loops, 1,
878 "Perform loop unrolling for all loops" },
879 {"move-all-movables", &flag_move_all_movables, 1,
880 "Force all loop invariant computations out of loops" },
881 {"reduce-all-givs", &flag_reduce_all_givs, 1,
882 "Strength reduce all loop general induction variables" },
883 {"writable-strings", &flag_writable_strings, 1,
884 "Store strings in writable data section" },
885 {"peephole", &flag_no_peephole, 0,
886 "Enable machine specific peephole optimisations" },
887 {"force-mem", &flag_force_mem, 1,
888 "Copy memory operands into registers before using" },
889 {"force-addr", &flag_force_addr, 1,
890 "Copy memory address constants into regs before using" },
891 {"function-cse", &flag_no_function_cse, 0,
892 "Allow function addresses to be held in registers" },
893 {"inline-functions", &flag_inline_functions, 1,
894 "Integrate simple functions into their callers" },
895 {"keep-inline-functions", &flag_keep_inline_functions, 1,
896 "Generate code for funcs even if they are fully inlined" },
897 {"inline", &flag_no_inline, 0,
898 "Pay attention to the 'inline' keyword"},
899 {"keep-static-consts", &flag_keep_static_consts, 1,
900 "Emit static const variables even if they are not used" },
901 {"syntax-only", &flag_syntax_only, 1,
902 "Check for syntax errors, then stop" },
903 {"shared-data", &flag_shared_data, 1,
904 "Mark data as shared rather than private" },
905 {"caller-saves", &flag_caller_saves, 1,
906 "Enable saving registers around function calls" },
907 {"pcc-struct-return", &flag_pcc_struct_return, 1,
908 "Return 'short' aggregates in memory, not registers" },
909 {"reg-struct-return", &flag_pcc_struct_return, 0,
910 "Return 'short' aggregates in registers" },
911 {"delayed-branch", &flag_delayed_branch, 1,
912 "Attempt to fill delay slots of branch instructions" },
913 {"gcse", &flag_gcse, 1,
914 "Perform the global common subexpression elimination" },
915 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
916 "Run CSE pass after loop optimisations"},
917 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
918 "Run the loop optimiser twice"},
919 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
920 "Delete useless null pointer checks" },
921 {"pretend-float", &flag_pretend_float, 1,
922 "Pretend that host and target use the same FP format"},
923 {"schedule-insns", &flag_schedule_insns, 1,
924 "Reschedule instructions to avoid pipeline stalls"},
925 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
926 "Run two passes of the instruction scheduler"},
927 {"sched-interblock",&flag_schedule_interblock, 1,
928 "Enable scheduling across basic blocks" },
929 {"sched-spec",&flag_schedule_speculative, 1,
930 "Allow speculative motion of non-loads" },
931 {"sched-spec-load",&flag_schedule_speculative_load, 1,
932 "Allow speculative motion of some loads" },
933 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
934 "Allow speculative motion of more loads" },
935 {"branch-count-reg",&flag_branch_on_count_reg, 1,
936 "Replace add,compare,branch with branch on count reg"},
937 {"pic", &flag_pic, 1,
938 "Generate position independent code, if possible"},
939 {"PIC", &flag_pic, 2, ""},
940 {"exceptions", &flag_exceptions, 1,
941 "Enable exception handling" },
942 {"new-exceptions", &flag_new_exceptions, 1,
943 "Use the new model for exception handling" },
944 {"unwind-tables", &flag_unwind_tables, 1,
945 "Just generate unwind tables for exception handling" },
946 {"sjlj-exceptions", &exceptions_via_longjmp, 1,
947 "Use setjmp/longjmp to handle exceptions" },
948 {"asynchronous-exceptions", &asynchronous_exceptions, 1,
949 "Support asynchronous exceptions" },
950 {"profile-arcs", &profile_arc_flag, 1,
951 "Insert arc based program profiling code" },
952 {"test-coverage", &flag_test_coverage, 1,
953 "Create data files needed by gcov" },
954 {"branch-probabilities", &flag_branch_probabilities, 1,
955 "Use profiling information for branch probabilities" },
956 {"reorder-blocks", &flag_reorder_blocks, 1,
957 "Reorder basic blocks to improve code placement" },
958 {"fast-math", &flag_fast_math, 1,
959 "Improve FP speed by violating ANSI & IEEE rules" },
960 {"common", &flag_no_common, 0,
961 "Do not put unitialised globals in the common section" },
962 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
963 "Do not generate .size directives" },
964 {"function-sections", &flag_function_sections, 1,
965 "place each function into its own section" },
966 {"data-sections", &flag_data_sections, 1,
967 "place data items into their own section" },
968 {"verbose-asm", &flag_verbose_asm, 1,
969 "Add extra commentry to assembler output"},
970 {"gnu-linker", &flag_gnu_linker, 1,
971 "Output GNU ld formatted global initialisers"},
972 {"regmove", &flag_regmove, 1,
973 "Enables a register move optimisation"},
974 {"optimize-register-move", &flag_regmove, 1,
975 "Do the full regmove optimization pass"},
976 {"pack-struct", &flag_pack_struct, 1,
977 "Pack structure members together without holes" },
978 {"stack-check", &flag_stack_check, 1,
979 "Insert stack checking code into the program" },
980 {"argument-alias", &flag_argument_noalias, 0,
981 "Specify that arguments may alias each other & globals"},
982 {"argument-noalias", &flag_argument_noalias, 1,
983 "Assume arguments may alias globals but not each other"},
984 {"argument-noalias-global", &flag_argument_noalias, 2,
985 "Assume arguments do not alias each other or globals" },
986 {"strict-aliasing", &flag_strict_aliasing, 1,
987 "Assume strict aliasing rules apply" },
988 {"align-loops", &align_loops, 0,
989 "Align the start of loops" },
990 {"align-jumps", &align_jumps, 0,
991 "Align labels which are only reached by jumping" },
992 {"align-labels", &align_labels, 0,
993 "Align all labels" },
994 {"align-functions", &align_functions, 0,
995 "Align the start of functions" },
996 {"check-memory-usage", &flag_check_memory_usage, 1,
997 "Generate code to check every memory access" },
998 {"prefix-function-name", &flag_prefix_function_name, 1,
999 "Add a prefix to all function names" },
1000 {"dump-unnumbered", &flag_dump_unnumbered, 1,
1001 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1002 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
1003 "Instrument function entry/exit with profiling calls"},
1004 {"ssa", &flag_ssa, 1,
1005 "Enable SSA optimizations" },
1006 {"leading-underscore", &flag_leading_underscore, 1,
1007 "External symbols have a leading underscore" },
1008 {"ident", &flag_no_ident, 0,
1009 "Process #ident directives"},
1010 { "peephole2", &flag_peephole2, 1,
1011 "Enables an rtl peephole pass run before sched2" },
1012 {"math-errno", &flag_errno_math, 1,
1013 "Set errno after built-in math functions"},
1014 {"bounded-pointers", &flag_bounded_pointers, 1,
1015 "Compile pointers as triples: value, base & end" },
1016 {"bounds-check", &flag_bounds_check, 1,
1017 "Generate code to check bounds before dereferencing pointers and arrays" }
1020 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1022 /* Table of language-specific options. */
1024 static struct lang_opt
1026 const char * option;
1027 const char * description;
1029 documented_lang_options[] =
1031 /* In order not to overload the --help output, the convention
1032 used here is to only describe those options which are not
1033 enabled by default. */
1035 { "-ansi", "Compile just for ANSI C" },
1036 { "-fallow-single-precision",
1037 "Do not promote floats to double if using -traditional" },
1038 { "-std= ", "Determine language standard"},
1040 { "-fsigned-bitfields", "" },
1041 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1042 { "-fno-signed-bitfields", "" },
1043 { "-fno-unsigned-bitfields","" },
1044 { "-fsigned-char", "Make 'char' be signed by default"},
1045 { "-funsigned-char", "Make 'char' be unsigned by default"},
1046 { "-fno-signed-char", "" },
1047 { "-fno-unsigned-char", "" },
1049 { "-ftraditional", "" },
1050 { "-traditional", "Attempt to support traditional K&R style C"},
1051 { "-fnotraditional", "" },
1052 { "-fno-traditional", "" },
1055 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1056 { "-fbuiltin", "" },
1057 { "-fno-builtin", "Do not recognise any built in functions" },
1058 { "-fhosted", "Assume normal C execution environment" },
1059 { "-fno-hosted", "" },
1061 "Assume that standard libraries & main might not exist" },
1062 { "-fno-freestanding", "" },
1063 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1064 { "-fno-cond-mismatch", "" },
1065 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1066 { "-fno-dollars-in-identifiers", "" },
1067 { "-fpreprocessed", "" },
1068 { "-fno-preprocessed", "" },
1069 { "-fshort-double", "Use the same size for double as for float" },
1070 { "-fno-short-double", "" },
1071 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1072 { "-fno-short-enums", "" },
1073 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1074 { "-fno-short-wchar", "" },
1076 { "-Wall", "Enable most warning messages" },
1077 { "-Wbad-function-cast",
1078 "Warn about casting functions to incompatible types" },
1079 { "-Wno-bad-function-cast", "" },
1080 { "-Wmissing-noreturn",
1081 "Warn about functions which might be candidates for attribute noreturn" },
1082 { "-Wno-missing-noreturn", "" },
1083 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1084 { "-Wno-cast-qual", "" },
1085 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1086 { "-Wno-char-subscripts", "" },
1087 { "-Wcomment", "Warn if nested comments are detected" },
1088 { "-Wno-comment", "" },
1089 { "-Wcomments", "Warn if nested comments are detected" },
1090 { "-Wno-comments", "" },
1091 { "-Wconversion", "Warn about possibly confusing type conversions" },
1092 { "-Wno-conversion", "" },
1093 { "-Wformat", "Warn about printf format anomalies" },
1094 { "-Wno-format", "" },
1095 { "-Wimplicit-function-declaration",
1096 "Warn about implicit function declarations" },
1097 { "-Wno-implicit-function-declaration", "" },
1098 { "-Werror-implicit-function-declaration", "" },
1099 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1100 { "-Wno-implicit-int", "" },
1101 { "-Wimplicit", "" },
1102 { "-Wno-implicit", "" },
1103 { "-Wimport", "Warn about the use of the #import directive" },
1104 { "-Wno-import", "" },
1105 { "-Wlong-long","" },
1106 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1107 { "-Wmain", "Warn about suspicious declarations of main" },
1108 { "-Wno-main", "" },
1109 { "-Wmissing-braces",
1110 "Warn about possibly missing braces around initialisers" },
1111 { "-Wno-missing-braces", "" },
1112 { "-Wmissing-declarations",
1113 "Warn about global funcs without previous declarations"},
1114 { "-Wno-missing-declarations", "" },
1115 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1116 { "-Wno-missing-prototypes", "" },
1117 { "-Wmultichar", "Warn about use of multicharacter literals"},
1118 { "-Wno-multichar", "" },
1119 { "-Wnested-externs", "Warn about externs not at file scope level" },
1120 { "-Wno-nested-externs", "" },
1121 { "-Wparentheses", "Warn about possible missing parentheses" },
1122 { "-Wno-parentheses", "" },
1123 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1124 { "-Wno-pointer-arith", "" },
1125 { "-Wredundant-decls",
1126 "Warn about multiple declarations of the same object" },
1127 { "-Wno-redundant-decls", "" },
1128 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1129 { "-Wno-sign-compare", "" },
1130 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1131 { "-Wno-float-equal", "" },
1132 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1133 { "-Wno-unknown-pragmas", "" },
1134 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1135 { "-Wno-strict-prototypes", "" },
1136 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1137 { "-Wno-traditional", "" },
1138 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1139 { "-Wno-trigraphs", "" },
1141 { "-Wno-undef", "" },
1142 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1143 { "-Wno-write-strings", "" },
1145 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1147 /* These are for Objective C. */
1148 DEFINE_LANG_NAME ("Objective C")
1150 { "-lang-objc", "" },
1151 { "-gen-decls", "Dump decls to a .decl file" },
1152 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1153 { "-fno-gnu-runtime", "" },
1154 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1155 { "-fno-next-runtime", "" },
1156 { "-Wselector", "Warn if a selector has multiple methods" },
1157 { "-Wno-selector", "" },
1158 { "-Wprotocol", "" },
1159 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1160 { "-print-objc-runtime-info",
1161 "Generate C header of platform specific features" },
1163 #include "options.h"
1167 /* Here is a table, controlled by the tm.h file, listing each -m switch
1168 and which bits in `target_switches' it should set or clear.
1169 If VALUE is positive, it is bits to set.
1170 If VALUE is negative, -VALUE is bits to clear.
1171 (The sign bit is not used so there is no confusion.) */
1177 const char * description;
1179 target_switches [] = TARGET_SWITCHES;
1181 /* This table is similar, but allows the switch to have a value. */
1183 #ifdef TARGET_OPTIONS
1186 const char * prefix;
1187 const char ** variable;
1188 const char * description;
1190 target_options [] = TARGET_OPTIONS;
1193 /* Options controlling warnings */
1195 /* Don't print warning messages. -w. */
1197 int inhibit_warnings = 0;
1199 /* Print various extra warnings. -W. */
1201 int extra_warnings = 0;
1203 /* Treat warnings as errors. -Werror. */
1205 int warnings_are_errors = 0;
1207 /* Nonzero to warn about unused local variables. */
1211 /* Nonzero to warn about code which is never reached. */
1213 int warn_notreached;
1215 /* Nonzero to warn about variables used before they are initialized. */
1217 int warn_uninitialized;
1219 /* Nonzero means warn about all declarations which shadow others. */
1223 /* Warn if a switch on an enum fails to have a case for every enum value. */
1227 /* Nonzero means warn about function definitions that default the return type
1228 or that use a null return and have a return-type other than void. */
1230 int warn_return_type;
1232 /* Nonzero means warn about pointer casts that increase the required
1233 alignment of the target type (and might therefore lead to a crash
1234 due to a misaligned access). */
1236 int warn_cast_align;
1238 /* Nonzero means warn about any identifiers that match in the first N
1239 characters. The value N is in `id_clash_len'. */
1244 /* Nonzero means warn about any objects definitions whose size is larger
1245 than N bytes. Also want about function definitions whose returned
1246 values are larger than N bytes. The value N is in `larger_than_size'. */
1248 int warn_larger_than;
1249 HOST_WIDE_INT larger_than_size;
1251 /* Nonzero means warn if inline function is too large. */
1255 /* Warn if a function returns an aggregate,
1256 since there are often incompatible calling conventions for doing this. */
1258 int warn_aggregate_return;
1260 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1264 /* Warn when gcc pads a structure to an alignment boundary. */
1268 /* Likewise for -W. */
1270 lang_independent_options W_options[] =
1272 {"unused", &warn_unused, 1, "Warn when a variable is unused" },
1273 {"error", &warnings_are_errors, 1, ""},
1274 {"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
1275 {"switch", &warn_switch, 1,
1276 "Warn about enumerated switches missing a specific case" },
1277 {"aggregate-return", &warn_aggregate_return, 1,
1278 "Warn about returning structures, unions or arrays" },
1279 {"cast-align", &warn_cast_align, 1,
1280 "Warn about pointer casts which increase alignment" },
1281 {"unreachable-code", &warn_notreached, 1,
1282 "Warn about code that will never be executed" },
1283 {"uninitialized", &warn_uninitialized, 1,
1284 "Warn about unitialized automatic variables"},
1285 {"inline", &warn_inline, 1,
1286 "Warn when an inlined function cannot be inlined"},
1287 {"packed", &warn_packed, 1,
1288 "Warn when the packed attribute has no effect on struct layout"},
1289 {"padded", &warn_padded, 1,
1290 "Warn when padding is required to align struct members"}
1293 /* Output files for assembler code (real compiler output)
1294 and debugging dumps. */
1297 FILE *aux_info_file;
1298 FILE *rtl_dump_file = NULL;
1300 /* Decode the string P as an integral parameter.
1301 If the string is indeed an integer return its numeric value else
1302 issue an Invalid Option error for the option PNAME and return DEFVAL.
1303 If PNAME is zero just return DEFVAL, do not call error. */
1306 read_integral_parameter (p, pname, defval)
1311 const char *endp = p;
1315 if (*endp >= '0' && *endp <= '9')
1324 error ("Invalid option `%s'", pname);
1332 /* Time accumulators, to count the total time spent in various passes. */
1336 int integration_time;
1342 int branch_prob_time;
1347 int local_alloc_time;
1348 int global_alloc_time;
1353 int reorder_blocks_time;
1354 int shorten_branch_time;
1362 /* Return time used so far, in microseconds. */
1372 #else /* not BeOS */
1373 #if defined (_WIN32) && !defined (__CYGWIN__)
1377 return (clock() * 1000);
1378 #else /* not _WIN32 */
1384 tick = 1000000 / sysconf(_SC_CLK_TCK);
1386 return (tms.tms_utime + tms.tms_stime) * tick;
1392 # if HAVE_SYSCONF && defined _SC_CLK_TCK
1393 # define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
1396 # define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
1398 # define TICKS_PER_SECOND HZ /* traditional UNIX */
1402 return (tms.tms_utime + tms.tms_stime) * (1000000 / TICKS_PER_SECOND);
1407 struct rusage rusage;
1408 getrusage (0, &rusage);
1409 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
1410 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
1417 int proc_system_time;
1418 int child_user_time;
1419 int child_system_time;
1421 times ((void *) &vms_times);
1422 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
1426 #endif /* _SC_CLK_TCK */
1428 #endif /* __BEOS__ */
1431 #define TIMEVAR(VAR, BODY) \
1432 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
1435 print_time (str, total)
1440 "time in %s: %d.%06d (%.0f%%)\n",
1441 str, total / 1000000, total % 1000000,
1442 all_time == 0 ? 0.00 : (double) total / (double) all_time * 100.0);
1445 /* This is the default decl_printable_name function. */
1448 decl_name (decl, verbosity)
1450 int verbosity ATTRIBUTE_UNUSED;
1452 return IDENTIFIER_POINTER (DECL_NAME (decl));
1455 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1460 struct file_stack *stack = *(struct file_stack **)p;
1462 /* We're only called for input_file_stack, so we can mark the current
1463 input_filename here as well. */
1464 ggc_mark_string (main_input_filename);
1465 ggc_mark_string (input_filename);
1469 ggc_mark_string (stack->name);
1470 stack = stack->next;
1475 /* This calls abort and is used to avoid problems when abort if a macro.
1476 It is used when we need to pass the address of abort. */
1484 /* When `malloc.c' is compiled with `rcheck' defined,
1485 it calls this function to report clobberage. */
1489 const char * s ATTRIBUTE_UNUSED;
1494 /* Return the logarithm of X, base 2, considering X unsigned,
1495 if X is a power of 2. Otherwise, returns -1.
1497 This should be used via the `exact_log2' macro. */
1501 register unsigned HOST_WIDE_INT x;
1503 register int log = 0;
1504 /* Test for 0 or a power of 2. */
1505 if (x == 0 || x != (x & -x))
1507 while ((x >>= 1) != 0)
1512 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1513 If X is 0, return -1.
1515 This should be used via the floor_log2 macro. */
1519 register unsigned HOST_WIDE_INT x;
1521 register int log = -1;
1528 static int float_handler_set;
1530 jmp_buf float_handler;
1532 /* Signals actually come here. */
1535 float_signal (signo)
1536 /* If this is missing, some compilers complain. */
1537 int signo ATTRIBUTE_UNUSED;
1539 if (float_handled == 0)
1541 #if defined (USG) || defined (hpux)
1542 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
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 fn() */
1584 set_float_handler (NULL);
1588 set_float_handler (buf);
1590 set_float_handler (NULL);
1594 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1595 error happens, pushing the previous specification into OLD_HANDLER.
1596 Return an indication of whether there was a previous handler in effect. */
1599 push_float_handler (handler, old_handler)
1600 jmp_buf handler, old_handler;
1602 int was_handled = float_handled;
1606 memcpy ((char *) old_handler, (char *) float_handler,
1607 sizeof (float_handler));
1609 memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
1613 /* Restore the previous specification of whether and where to longjmp to
1614 when a floating arithmetic error happens. */
1617 pop_float_handler (handled, handler)
1621 float_handled = handled;
1623 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1626 /* Handler for SIGPIPE. */
1630 /* If this is missing, some compilers complain. */
1631 int signo ATTRIBUTE_UNUSED;
1633 fatal ("output pipe has been closed");
1636 /* Strip off a legitimate source ending from the input string NAME of
1637 length LEN. Rather than having to know the names used by all of
1638 our front ends, we strip off an ending of a period followed by
1639 up to five characters. (Java uses ".class".) */
1642 strip_off_ending (name, len)
1647 for (i = 2; i < 6 && len > i; i++)
1649 if (name[len - i] == '.')
1651 name[len - i] = '\0';
1657 /* Output a quoted string. */
1660 output_quoted_string (asm_file, string)
1664 #ifdef OUTPUT_QUOTED_STRING
1665 OUTPUT_QUOTED_STRING (asm_file, string);
1669 putc ('\"', asm_file);
1670 while ((c = *string++) != 0)
1672 if (c == '\"' || c == '\\')
1673 putc ('\\', asm_file);
1676 putc ('\"', asm_file);
1680 /* Output a file name in the form wanted by System V. */
1683 output_file_directive (asm_file, input_name)
1685 const char *input_name;
1687 int len = strlen (input_name);
1688 const char *na = input_name + len;
1690 /* NA gets INPUT_NAME sans directory names. */
1691 while (na > input_name)
1695 #ifdef DIR_SEPARATOR
1696 if (na[-1] == DIR_SEPARATOR)
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. */
1718 output_lang_identify (asm_out_file)
1721 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1722 char *s = (char *) alloca (len);
1723 sprintf (s, "__gnu_compiled_%s", lang_identify ());
1724 ASM_OUTPUT_LABEL (asm_out_file, s);
1728 /* Routine to open a dump file. */
1730 open_dump_file (suffix, function_name)
1732 const char *function_name;
1739 dumpname = concat (dump_base_name, suffix, NULL);
1741 if (rtl_dump_file != NULL)
1742 fclose (rtl_dump_file);
1744 rtl_dump_file = fopen (dumpname, "a");
1746 if (rtl_dump_file == NULL)
1747 pfatal_with_name (dumpname);
1752 fprintf (rtl_dump_file, "\n;; Function %s\n\n", function_name);
1758 /* Routine to close a dump file. */
1760 close_dump_file (func, insns)
1761 void (*func) PARAMS ((FILE *, rtx));
1768 func (rtl_dump_file, insns);
1770 fflush (rtl_dump_file);
1771 fclose (rtl_dump_file);
1773 rtl_dump_file = NULL;
1779 /* Routine to dump rtl into a file. */
1781 dump_rtl (suffix, decl, func, insns)
1784 void (*func) PARAMS ((FILE *, rtx));
1787 open_dump_file (suffix, decl_printable_name (decl, 2));
1788 close_dump_file (func, insns);
1791 /* Routine to empty a dump file. */
1793 clean_dump_file (suffix)
1796 char * const dumpname = concat (dump_base_name, suffix, NULL);
1798 rtl_dump_file = fopen (dumpname, "w");
1800 if (rtl_dump_file == NULL)
1801 pfatal_with_name (dumpname);
1805 fclose (rtl_dump_file);
1806 rtl_dump_file = NULL;
1811 /* Do any final processing required for the declarations in VEC, of
1812 which there are LEN. We write out inline functions and variables
1813 that have been deferred until this point, but which are required.
1814 Returns non-zero if anything was put out. */
1816 wrapup_global_declarations (vec, len)
1823 int output_something = 0;
1825 for (i = 0; i < len; i++)
1829 /* We're not deferring this any longer. */
1830 DECL_DEFER_OUTPUT (decl) = 0;
1832 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1833 && incomplete_decl_finalize_hook != 0)
1834 (*incomplete_decl_finalize_hook) (decl);
1837 /* Now emit any global variables or functions that we have been
1838 putting off. We need to loop in case one of the things emitted
1839 here references another one which comes earlier in the list. */
1843 for (i = 0; i < len; i++)
1847 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1850 /* Don't write out static consts, unless we still need them.
1852 We also keep static consts if not optimizing (for debugging),
1853 unless the user specified -fno-keep-static-consts.
1854 ??? They might be better written into the debug information.
1855 This is possible when using DWARF.
1857 A language processor that wants static constants to be always
1858 written out (even if it is not used) is responsible for
1859 calling rest_of_decl_compilation itself. E.g. the C front-end
1860 calls rest_of_decl_compilation from finish_decl.
1861 One motivation for this is that is conventional in some
1862 environments to write things like:
1863 static const char rcsid[] = "... version string ...";
1864 intending to force the string to be in the executable.
1866 A language processor that would prefer to have unneeded
1867 static constants "optimized away" would just defer writing
1868 them out until here. E.g. C++ does this, because static
1869 constants are often defined in header files.
1871 ??? A tempting alternative (for both C and C++) would be
1872 to force a constant to be written if and only if it is
1873 defined in a main file, as opposed to an include file. */
1875 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1876 && (! TREE_READONLY (decl)
1877 || TREE_PUBLIC (decl)
1878 || (!optimize && flag_keep_static_consts)
1879 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1882 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1885 if (TREE_CODE (decl) == FUNCTION_DECL
1886 && DECL_INITIAL (decl) != 0
1887 && DECL_SAVED_INSNS (decl) != 0
1888 && (flag_keep_inline_functions
1889 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1890 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1893 temporary_allocation ();
1894 output_inline_function (decl);
1895 permanent_allocation (1);
1900 output_something = 1;
1904 return output_something;
1907 /* Issue appropriate warnings for the global declarations in VEC (of
1908 which there are LEN). Output debugging information for them. */
1910 check_global_declarations (vec, len)
1917 for (i = 0; i < len; i++)
1921 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1922 && ! TREE_ASM_WRITTEN (decl))
1923 /* Cancel the RTL for this decl so that, if debugging info
1924 output for global variables is still to come,
1925 this one will be omitted. */
1926 DECL_RTL (decl) = NULL;
1928 /* Warn about any function
1929 declared static but not defined.
1930 We don't warn about variables,
1931 because many programs have static variables
1932 that exist only to get some text into the object file. */
1933 if (TREE_CODE (decl) == FUNCTION_DECL
1935 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1936 && DECL_INITIAL (decl) == 0
1937 && DECL_EXTERNAL (decl)
1938 && ! DECL_ARTIFICIAL (decl)
1939 && ! TREE_PUBLIC (decl))
1941 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1942 pedwarn_with_decl (decl,
1943 "`%s' used but never defined");
1945 warning_with_decl (decl,
1946 "`%s' declared `static' but never defined");
1947 /* This symbol is effectively an "extern" declaration now. */
1948 TREE_PUBLIC (decl) = 1;
1949 assemble_external (decl);
1952 /* Warn about static fns or vars defined but not used,
1953 but not about inline functions or static consts
1954 since defining those in header files is normal practice. */
1956 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
1957 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
1958 && ! DECL_IN_SYSTEM_HEADER (decl)
1959 && ! DECL_EXTERNAL (decl)
1960 && ! TREE_PUBLIC (decl)
1961 && ! TREE_USED (decl)
1962 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
1963 /* The TREE_USED bit for file-scope decls
1964 is kept in the identifier, to handle multiple
1965 external decls in different scopes. */
1966 && ! TREE_USED (DECL_NAME (decl)))
1967 warning_with_decl (decl, "`%s' defined but not used");
1969 #ifdef SDB_DEBUGGING_INFO
1970 /* The COFF linker can move initialized global vars to the end.
1971 And that can screw up the symbol ordering.
1972 By putting the symbols in that order to begin with,
1973 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1974 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1975 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1976 && ! DECL_EXTERNAL (decl)
1977 && DECL_RTL (decl) != 0)
1978 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
1980 /* Output COFF information for non-global
1981 file-scope initialized variables. */
1982 if (write_symbols == SDB_DEBUG
1983 && TREE_CODE (decl) == VAR_DECL
1984 && DECL_INITIAL (decl)
1985 && ! DECL_EXTERNAL (decl)
1986 && DECL_RTL (decl) != 0
1987 && GET_CODE (DECL_RTL (decl)) == MEM)
1988 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
1989 #endif /* SDB_DEBUGGING_INFO */
1990 #ifdef DWARF_DEBUGGING_INFO
1991 /* Output DWARF information for file-scope tentative data object
1992 declarations, file-scope (extern) function declarations (which
1993 had no corresponding body) and file-scope tagged type declarations
1994 and definitions which have not yet been forced out. */
1996 if (write_symbols == DWARF_DEBUG
1997 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1998 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
2000 #ifdef DWARF2_DEBUGGING_INFO
2001 /* Output DWARF2 information for file-scope tentative data object
2002 declarations, file-scope (extern) function declarations (which
2003 had no corresponding body) and file-scope tagged type declarations
2004 and definitions which have not yet been forced out. */
2006 if (write_symbols == DWARF2_DEBUG
2007 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2008 TIMEVAR (symout_time, dwarf2out_decl (decl));
2013 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2014 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2015 INPUT_FILENAME and LINENO accordingly. */
2018 push_srcloc (file, line)
2022 struct file_stack *fs;
2024 if (input_file_stack)
2026 input_file_stack->name = input_filename;
2027 input_file_stack->line = lineno;
2030 fs = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2031 fs->name = input_filename = file;
2032 fs->line = lineno = line;
2033 fs->indent_level = 0;
2034 fs->next = input_file_stack;
2035 input_file_stack = fs;
2036 input_file_stack_tick++;
2039 /* Pop the top entry off the stack of presently open source files.
2040 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2046 struct file_stack *fs;
2048 fs = input_file_stack;
2049 input_file_stack = fs->next;
2051 input_file_stack_tick++;
2052 /* The initial souce file is never popped. */
2053 if (!input_file_stack)
2055 input_filename = input_file_stack->name;
2056 lineno = input_file_stack->line;
2059 /* Compile an entire file of output from cpp, named NAME.
2060 Write a file of assembly output and various debugging dumps. */
2069 int name_specified = name != 0;
2071 if (dump_base_name == 0)
2072 dump_base_name = name ? name : "gccdump";
2076 integration_time = 0;
2082 branch_prob_time = 0;
2087 local_alloc_time = 0;
2088 global_alloc_time = 0;
2093 reorder_blocks_time = 0;
2094 shorten_branch_time = 0;
2100 /* Initialize data in various passes. */
2104 name = init_parse (name);
2105 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2106 || debug_info_level == DINFO_LEVEL_VERBOSE
2107 || flag_test_coverage
2108 || warn_notreached);
2110 init_decl_processing ();
2117 init_function_once ();
2118 init_stor_layout_once ();
2119 init_varasm_once ();
2121 /* The following initialization functions need to generate rtl, so
2122 provide a dummy function context for them. */
2123 init_dummy_function_start ();
2126 if (flag_caller_saves)
2127 init_caller_save ();
2128 expand_dummy_function_end ();
2130 /* If auxiliary info generation is desired, open the output file.
2131 This goes in the same directory as the source file--unlike
2132 all the other output files. */
2133 if (flag_gen_aux_info)
2135 aux_info_file = fopen (aux_info_file_name, "w");
2136 if (aux_info_file == 0)
2137 pfatal_with_name (aux_info_file_name);
2140 /* Clear the dump files. */
2142 clean_dump_file (".00.rtl");
2145 clean_dump_file (".01.jump");
2146 if (graph_dump_format != no_graph)
2147 clean_graph_dump_file (dump_base_name, ".01.jump");
2151 clean_dump_file (".02.cse");
2152 if (graph_dump_format != no_graph)
2153 clean_graph_dump_file (dump_base_name, ".02.cse");
2157 clean_dump_file (".03.addressof");
2158 if (graph_dump_format != no_graph)
2159 clean_graph_dump_file (dump_base_name, ".03.addressof");
2163 clean_dump_file (".033.ssa");
2164 clean_dump_file (".037.ussa");
2168 clean_dump_file (".04.gcse");
2169 if (graph_dump_format != no_graph)
2170 clean_graph_dump_file (dump_base_name, ".04.gcse");
2174 clean_dump_file (".05.loop");
2175 if (graph_dump_format != no_graph)
2176 clean_graph_dump_file (dump_base_name, ".05.loop");
2180 clean_dump_file (".06.cse2");
2181 if (graph_dump_format != no_graph)
2182 clean_graph_dump_file (dump_base_name, ".06.cse2");
2184 if (branch_prob_dump)
2186 clean_dump_file (".07.bp");
2187 if (graph_dump_format != no_graph)
2188 clean_graph_dump_file (dump_base_name, ".07.bp");
2192 clean_dump_file (".08.flow");
2193 if (graph_dump_format != no_graph)
2194 clean_graph_dump_file (dump_base_name, ".08.flow");
2198 clean_dump_file (".09.combine");
2199 if (graph_dump_format != no_graph)
2200 clean_graph_dump_file (dump_base_name, ".09.combine");
2204 clean_dump_file (".10.regmove");
2205 if (graph_dump_format != no_graph)
2206 clean_graph_dump_file (dump_base_name, ".10.regmove");
2208 #ifdef INSN_SCHEDULING
2211 clean_dump_file (".11.sched");
2212 if (graph_dump_format != no_graph)
2213 clean_graph_dump_file (dump_base_name, ".11.sched");
2218 clean_dump_file (".12.lreg");
2219 if (graph_dump_format != no_graph)
2220 clean_graph_dump_file (dump_base_name, ".12.lreg");
2222 if (global_reg_dump)
2224 clean_dump_file (".13.greg");
2225 if (graph_dump_format != no_graph)
2226 clean_graph_dump_file (dump_base_name, ".13.greg");
2230 clean_dump_file (".14.flow2");
2231 if (graph_dump_format != no_graph)
2232 clean_graph_dump_file (dump_base_name, ".14.flow2");
2234 #ifdef HAVE_peephole2
2237 clean_dump_file (".15.peephole2");
2238 if (graph_dump_format != no_graph)
2239 clean_graph_dump_file (dump_base_name, ".15.peephole2");
2242 #ifdef INSN_SCHEDULING
2245 clean_dump_file (".16.sched2");
2246 if (graph_dump_format != no_graph)
2247 clean_graph_dump_file (dump_base_name, ".16.sched2");
2250 if (reorder_blocks_dump)
2252 clean_dump_file (".bbro");
2253 if (graph_dump_format != no_graph)
2254 clean_graph_dump_file (dump_base_name, ".bbro");
2258 clean_dump_file (".17.jump2");
2259 if (graph_dump_format != no_graph)
2260 clean_graph_dump_file (dump_base_name, ".17.jump2");
2262 #ifdef MACHINE_DEPENDENT_REORG
2263 if (mach_dep_reorg_dump)
2265 clean_dump_file (".18.mach");
2266 if (graph_dump_format != no_graph)
2267 clean_graph_dump_file (dump_base_name, ".18.mach");
2273 clean_dump_file (".19.dbr");
2274 if (graph_dump_format != no_graph)
2275 clean_graph_dump_file (dump_base_name, ".19.dbr");
2281 clean_dump_file (".20.stack");
2282 if (graph_dump_format != no_graph)
2283 clean_graph_dump_file (dump_base_name, ".20.stack");
2287 /* Open assembler code output file. */
2289 if (flag_syntax_only)
2290 asm_out_file = NULL;
2293 if (! name_specified && asm_file_name == 0)
2294 asm_out_file = stdout;
2297 if (asm_file_name == 0)
2299 int len = strlen (dump_base_name);
2300 char *dumpname = (char *) xmalloc (len + 6);
2301 memcpy (dumpname, dump_base_name, len + 1);
2302 strip_off_ending (dumpname, len);
2303 strcat (dumpname, ".s");
2304 asm_file_name = dumpname;
2306 if (!strcmp (asm_file_name, "-"))
2307 asm_out_file = stdout;
2309 asm_out_file = fopen (asm_file_name, "w");
2310 if (asm_out_file == 0)
2311 pfatal_with_name (asm_file_name);
2314 #ifdef IO_BUFFER_SIZE
2315 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2316 _IOFBF, IO_BUFFER_SIZE);
2321 name = ggc_alloc_string (name, strlen (name));
2322 input_filename = name;
2324 /* Put an entry on the input file stack for the main input file. */
2325 push_srcloc (input_filename, 0);
2327 /* Perform language-specific initialization.
2328 This may set main_input_filename. */
2331 /* If the input doesn't start with a #line, use the input name
2332 as the official input file name. */
2333 if (main_input_filename == 0)
2334 main_input_filename = name;
2336 if (flag_syntax_only)
2338 write_symbols = NO_DEBUG;
2340 profile_block_flag = 0;
2344 ASM_FILE_START (asm_out_file);
2346 #ifdef ASM_COMMENT_START
2347 if (flag_verbose_asm)
2349 /* Print the list of options in effect. */
2350 print_version (asm_out_file, ASM_COMMENT_START);
2351 print_switch_values (asm_out_file, 0, MAX_LINE,
2352 ASM_COMMENT_START, " ", "\n");
2353 /* Add a blank line here so it appears in assembler output but not
2355 fprintf (asm_out_file, "\n");
2359 /* Output something to inform GDB that this compilation was by GCC. */
2360 #ifndef ASM_IDENTIFY_GCC
2361 fprintf (asm_out_file, "gcc2_compiled.:\n");
2363 ASM_IDENTIFY_GCC (asm_out_file);
2366 /* Output something to identify which front-end produced this file. */
2367 #ifdef ASM_IDENTIFY_LANGUAGE
2368 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2370 } /* ! flag_syntax_only */
2372 #ifndef ASM_OUTPUT_SECTION_NAME
2373 if (flag_function_sections)
2375 warning ("-ffunction-sections not supported for this target.");
2376 flag_function_sections = 0;
2378 if (flag_data_sections)
2380 warning ("-fdata-sections not supported for this target.");
2381 flag_data_sections = 0;
2385 if (flag_function_sections
2386 && (profile_flag || profile_block_flag))
2388 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2389 flag_function_sections = 0;
2392 #ifndef OBJECT_FORMAT_ELF
2393 if (flag_function_sections && write_symbols != NO_DEBUG)
2394 warning ("-ffunction-sections may affect debugging on some targets.");
2397 /* ??? Note: There used to be a conditional here
2398 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2399 This was to guarantee separation between gcc_compiled. and
2400 the first function, for the sake of dbx on Suns.
2401 However, having the extra zero here confused the Emacs
2402 code for unexec, and might confuse other programs too.
2403 Therefore, I took out that change.
2404 In future versions we should find another way to solve
2405 that dbx problem. -- rms, 23 May 93. */
2407 /* Don't let the first function fall at the same address
2408 as gcc_compiled., if profiling. */
2409 if (profile_flag || profile_block_flag)
2411 /* It's best if we can write a nop here since some
2412 assemblers don't tolerate zeros in the text section. */
2413 output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
2416 /* If dbx symbol table desired, initialize writing it
2417 and output the predefined types. */
2418 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2419 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2420 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
2423 #ifdef SDB_DEBUGGING_INFO
2424 if (write_symbols == SDB_DEBUG)
2425 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
2428 #ifdef DWARF_DEBUGGING_INFO
2429 if (write_symbols == DWARF_DEBUG)
2430 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
2432 #ifdef DWARF2_UNWIND_INFO
2433 if (dwarf2out_do_frame ())
2434 dwarf2out_frame_init ();
2436 #ifdef DWARF2_DEBUGGING_INFO
2437 if (write_symbols == DWARF2_DEBUG)
2438 TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
2441 /* Initialize yet another pass. */
2443 init_final (main_input_filename);
2444 init_branch_prob (dump_base_name);
2446 start_time = get_run_time ();
2448 /* Call the parser, which parses the entire file
2449 (calling rest_of_compilation for each function). */
2451 if (yyparse () != 0)
2453 if (errorcount == 0)
2454 fnotice (stderr, "Errors detected in input file (your bison.simple is out of date)\n");
2456 /* In case there were missing closebraces,
2457 get us back to the global binding level. */
2458 while (! global_bindings_p ())
2462 /* Compilation is now finished except for writing
2463 what's left of the symbol table output. */
2465 parse_time += get_run_time () - start_time;
2467 parse_time -= integration_time;
2468 parse_time -= varconst_time;
2470 if (flag_syntax_only)
2473 globals = getdecls ();
2475 /* Really define vars that have had only a tentative definition.
2476 Really output inline functions that must actually be callable
2477 and have not been output so far. */
2480 int len = list_length (globals);
2481 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2485 /* Process the decls in reverse order--earliest first.
2486 Put them into VEC from back to front, then take out from front. */
2488 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2489 vec[len - i - 1] = decl;
2491 wrapup_global_declarations (vec, len);
2493 /* This must occur after the loop to output deferred functions. Else
2494 the profiler initializer would not be emitted if all the functions
2495 in this compilation unit were deferred.
2497 output_func_start_profiler can not cause any additional functions or
2498 data to need to be output, so it need not be in the deferred function
2500 output_func_start_profiler ();
2502 /* Now that all possible functions have been output, we can dump
2503 the exception table. */
2505 output_exception_table ();
2507 check_global_declarations (vec, len);
2513 /* Write out any pending weak symbol declarations. */
2517 /* Do dbx symbols */
2518 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2519 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2520 TIMEVAR (symout_time,
2522 dbxout_finish (asm_out_file, main_input_filename);
2526 #ifdef DWARF_DEBUGGING_INFO
2527 if (write_symbols == DWARF_DEBUG)
2528 TIMEVAR (symout_time,
2534 #ifdef DWARF2_UNWIND_INFO
2535 if (dwarf2out_do_frame ())
2536 dwarf2out_frame_finish ();
2539 #ifdef DWARF2_DEBUGGING_INFO
2540 if (write_symbols == DWARF2_DEBUG)
2541 TIMEVAR (symout_time,
2543 dwarf2out_finish ();
2547 /* Output some stuff at end of file if nec. */
2549 end_final (dump_base_name);
2551 if (branch_prob_dump)
2552 open_dump_file (".07.bp", NULL);
2554 TIMEVAR (dump_time, end_branch_prob (rtl_dump_file));
2556 if (branch_prob_dump)
2557 close_dump_file (NULL, NULL_RTX);
2560 ASM_FILE_END (asm_out_file);
2564 /* Language-specific end of compilation actions. */
2568 /* Close the dump files. */
2570 if (flag_gen_aux_info)
2572 fclose (aux_info_file);
2574 unlink (aux_info_file_name);
2579 open_dump_file (".09.combine", NULL);
2580 TIMEVAR (dump_time, dump_combine_total_stats (rtl_dump_file));
2581 close_dump_file (NULL, NULL_RTX);
2584 /* Close non-debugging input and output files. Take special care to note
2585 whether fclose returns an error, since the pages might still be on the
2586 buffer chain while the file is open. */
2590 if (! flag_syntax_only
2591 && (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0))
2592 fatal_io_error (asm_file_name);
2594 /* Do whatever is necessary to finish printing the graphs. */
2595 if (graph_dump_format != no_graph)
2598 finish_graph_dump_file (dump_base_name, ".01.jump");
2600 finish_graph_dump_file (dump_base_name, ".02.cse");
2602 finish_graph_dump_file (dump_base_name, ".03.addressof");
2604 finish_graph_dump_file (dump_base_name, ".04.gcse");
2606 finish_graph_dump_file (dump_base_name, ".05.loop");
2608 finish_graph_dump_file (dump_base_name, ".06.cse2");
2609 if (branch_prob_dump)
2610 finish_graph_dump_file (dump_base_name, ".07.bp");
2612 finish_graph_dump_file (dump_base_name, ".08.flow");
2614 finish_graph_dump_file (dump_base_name, ".09.combine");
2616 finish_graph_dump_file (dump_base_name, ".10.regmove");
2617 #ifdef INSN_SCHEDULING
2619 finish_graph_dump_file (dump_base_name, ".11.sched");
2622 finish_graph_dump_file (dump_base_name, ".12.lreg");
2623 if (global_reg_dump)
2624 finish_graph_dump_file (dump_base_name, ".13.greg");
2626 finish_graph_dump_file (dump_base_name, ".14.flow2");
2627 #ifdef HAVE_peephole2
2629 finish_graph_dump_file (dump_base_name, ".15.peephole2");
2631 #ifdef INSN_SCHEDULING
2633 finish_graph_dump_file (dump_base_name, ".16.sched2");
2635 if (reorder_blocks_dump)
2636 finish_graph_dump_file (dump_base_name, ".bbro");
2638 finish_graph_dump_file (dump_base_name, ".17.jump2");
2639 #ifdef MACHINE_DEPENDENT_REORG
2640 if (mach_dep_reorg_dump)
2641 finish_graph_dump_file (dump_base_name, ".18.mach");
2645 finish_graph_dump_file (dump_base_name, ".19.dbr");
2649 finish_graph_dump_file (dump_base_name, ".20.stack");
2653 /* Free up memory for the benefit of leak detectors. */
2656 /* Print the times. */
2660 all_time = get_run_time ();
2662 fprintf (stderr,"\n");
2664 print_time ("parse", parse_time);
2665 print_time ("integration", integration_time);
2666 print_time ("jump", jump_time);
2667 print_time ("cse", cse_time);
2668 print_time ("gcse", gcse_time);
2669 print_time ("loop", loop_time);
2670 print_time ("cse2", cse2_time);
2671 print_time ("branch-prob", branch_prob_time);
2672 print_time ("flow", flow_time);
2673 print_time ("combine", combine_time);
2674 print_time ("regmove", regmove_time);
2675 #ifdef INSN_SCHEDULING
2676 print_time ("sched", sched_time);
2678 print_time ("local-alloc", local_alloc_time);
2679 print_time ("global-alloc", global_alloc_time);
2680 print_time ("flow2", flow2_time);
2681 #ifdef HAVE_peephole2
2682 print_time ("peephole2", peephole2_time);
2684 #ifdef INSN_SCHEDULING
2685 print_time ("sched2", sched2_time);
2688 print_time ("dbranch", dbr_sched_time);
2690 print_time ("bbro", reorder_blocks_time);
2691 print_time ("shorten-branch", shorten_branch_time);
2693 print_time ("stack-reg", stack_reg_time);
2695 print_time ("final", final_time);
2696 print_time ("varconst", varconst_time);
2697 print_time ("symout", symout_time);
2698 print_time ("dump", dump_time);
2700 print_time ("gc", gc_time);
2704 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2705 and TYPE_DECL nodes.
2707 This does nothing for local (non-static) variables, unless the
2708 variable is a register variable with an ASMSPEC. In that case, or
2709 if the variable is not an automatice, it sets up the RTL and
2710 outputs any assembler code (label definition, storage allocation
2711 and initialization).
2713 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2714 the assembler symbol name to be used. TOP_LEVEL is nonzero
2715 if this declaration is not within a function. */
2718 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2720 const char *asmspec;
2724 /* Declarations of variables, and of functions defined elsewhere. */
2726 /* The most obvious approach, to put an #ifndef around where
2727 this macro is used, doesn't work since it's inside a macro call. */
2728 #ifndef ASM_FINISH_DECLARE_OBJECT
2729 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2732 /* Forward declarations for nested functions are not "external",
2733 but we need to treat them as if they were. */
2734 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2735 || TREE_CODE (decl) == FUNCTION_DECL)
2736 TIMEVAR (varconst_time,
2738 make_decl_rtl (decl, asmspec, top_level);
2739 /* Initialized extern variable exists to be replaced
2740 with its value, or represents something that will be
2741 output in another file. */
2742 if (! (TREE_CODE (decl) == VAR_DECL
2743 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2744 && DECL_INITIAL (decl) != 0
2745 && DECL_INITIAL (decl) != error_mark_node))
2746 /* Don't output anything
2747 when a tentative file-scope definition is seen.
2748 But at end of compilation, do output code for them. */
2749 if (! (! at_end && top_level
2750 && (DECL_INITIAL (decl) == 0
2751 || DECL_INITIAL (decl) == error_mark_node)))
2752 assemble_variable (decl, top_level, at_end, 0);
2753 if (decl == last_assemble_variable_decl)
2755 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2759 else if (DECL_REGISTER (decl) && asmspec != 0)
2761 if (decode_reg_name (asmspec) >= 0)
2763 DECL_RTL (decl) = 0;
2764 make_decl_rtl (decl, asmspec, top_level);
2767 error ("invalid register name `%s' for register variable", asmspec);
2769 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2770 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2771 && TREE_CODE (decl) == TYPE_DECL)
2772 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2774 #ifdef SDB_DEBUGGING_INFO
2775 else if (write_symbols == SDB_DEBUG && top_level
2776 && TREE_CODE (decl) == TYPE_DECL)
2777 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2781 /* Called after finishing a record, union or enumeral type. */
2784 rest_of_type_compilation (type, toplev)
2785 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2789 tree type ATTRIBUTE_UNUSED;
2790 int toplev ATTRIBUTE_UNUSED;
2793 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2794 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2795 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2797 #ifdef SDB_DEBUGGING_INFO
2798 if (write_symbols == SDB_DEBUG)
2799 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2803 /* DECL is an inline function, whose body is present, but which is not
2804 being output at this point. (We're putting that off until we need
2805 to do it.) If there are any actions that need to take place,
2806 including the emission of debugging information for the function,
2807 this is where they should go. This function may be called by
2808 language-dependent code for front-ends that do not even generate
2809 RTL for functions that don't need to be put out. */
2812 note_deferral_of_defined_inline_function (decl)
2813 tree decl ATTRIBUTE_UNUSED;
2815 #ifdef DWARF_DEBUGGING_INFO
2816 /* Generate the DWARF info for the "abstract" instance of a function
2817 which we may later generate inlined and/or out-of-line instances
2819 if (write_symbols == DWARF_DEBUG)
2821 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2822 DWARF code expects it to be set in this case. Intuitively,
2823 DECL is the function we just finished defining, so setting
2824 CURRENT_FUNCTION_DECL is sensible. */
2825 tree saved_cfd = current_function_decl;
2826 current_function_decl = decl;
2828 /* Let the DWARF code do its work. */
2829 set_decl_abstract_flags (decl, 1);
2830 dwarfout_file_scope_decl (decl, 0);
2831 set_decl_abstract_flags (decl, 0);
2833 /* Reset CURRENT_FUNCTION_DECL. */
2834 current_function_decl = saved_cfd;
2839 /* This is called from finish_function (within yyparse)
2840 after each top-level definition is parsed.
2841 It is supposed to compile that function or variable
2842 and output the assembler code for it.
2843 After we return, the tree storage is freed. */
2846 rest_of_compilation (decl)
2850 int start_time = get_run_time ();
2853 int rebuild_label_notes_after_reload;
2855 /* When processing delayed functions, prepare_function_start() won't
2856 have been run to re-initialize it. */
2857 cse_not_expected = ! optimize;
2859 /* First, make sure that NOTE_BLOCK is set correctly for each
2860 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2861 find_loop_tree_blocks ();
2863 /* Then remove any notes we don't need. That will make iterating
2864 over the instruction sequence faster, and allow the garbage
2865 collector to reclaim the memory used by the notes. */
2866 remove_unncessary_notes ();
2868 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2869 tree in sensible shape. So, we just recalculate it here. */
2870 if (cfun->x_whole_function_mode_p)
2871 unroll_block_trees ();
2873 /* If we are reconsidering an inline function
2874 at the end of compilation, skip the stuff for making it inline. */
2876 if (DECL_SAVED_INSNS (decl) == 0)
2882 /* If this is nested inside an inlined external function, pretend
2883 it was only declared. Since we cannot inline such functions,
2884 generating code for this one is not only not necessary but will
2885 confuse some debugging output writers. */
2886 for (parent = DECL_CONTEXT (current_function_decl);
2887 parent != NULL_TREE;
2888 parent = get_containing_scope (parent))
2889 if (TREE_CODE (parent) == FUNCTION_DECL
2890 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2892 DECL_INITIAL (decl) = 0;
2893 goto exit_rest_of_compilation;
2896 /* If requested, consider whether to make this function inline. */
2897 if (DECL_INLINE (decl) || flag_inline_functions)
2898 TIMEVAR (integration_time,
2900 lose = function_cannot_inline_p (decl);
2901 if (lose || ! optimize)
2903 if (warn_inline && DECL_INLINE (decl))
2904 warning_with_decl (decl, lose);
2905 DECL_ABSTRACT_ORIGIN (decl) = 0;
2906 /* Don't really compile an extern inline function.
2907 If we can't make it inline, pretend
2908 it was only declared. */
2909 if (DECL_EXTERNAL (decl))
2911 DECL_INITIAL (decl) = 0;
2912 goto exit_rest_of_compilation;
2916 /* ??? Note that this has the effect of making it look
2917 like "inline" was specified for a function if we choose
2918 to inline it. This isn't quite right, but it's
2919 probably not worth the trouble to fix. */
2920 inlinable = DECL_INLINE (decl) = 1;
2923 insns = get_insns ();
2925 /* Dump the rtl code if we are dumping rtl. */
2929 open_dump_file (".00.rtl", decl_printable_name (decl, 2));
2931 if (DECL_SAVED_INSNS (decl))
2932 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2934 close_dump_file (print_rtl, insns);
2937 /* If function is inline, and we don't yet know whether to
2938 compile it by itself, defer decision till end of compilation.
2939 finish_compilation will call rest_of_compilation again
2940 for those functions that need to be output. Also defer those
2941 functions that we are supposed to defer. */
2944 || (DECL_INLINE (decl)
2945 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2946 && ! flag_keep_inline_functions)
2947 || DECL_EXTERNAL (decl))))
2948 DECL_DEFER_OUTPUT (decl) = 1;
2950 if (DECL_DEFER_OUTPUT (decl))
2952 /* If -Wreturn-type, we have to do a bit of compilation.
2953 However, if we just fall through we will call
2954 save_for_inline_copying() which results in excessive
2955 memory use. Instead, we just want to call
2956 jump_optimize() to figure out whether or not we can fall
2957 off the end of the function; we do the minimum amount of
2958 work necessary to make that safe. And, we set optimize
2959 to zero to keep jump_optimize from working too hard. */
2960 if (warn_return_type)
2962 int saved_optimize = optimize;
2964 find_exception_handler_labels ();
2965 jump_optimize (get_insns(), !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2966 !JUMP_AFTER_REGSCAN);
2967 optimize = saved_optimize;
2970 note_deferral_of_defined_inline_function (decl);
2971 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2972 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2973 goto exit_rest_of_compilation;
2976 /* If specified extern inline but we aren't inlining it, we are
2977 done. This goes for anything that gets here with DECL_EXTERNAL
2978 set, not just things with DECL_INLINE. */
2979 if (DECL_EXTERNAL (decl))
2980 goto exit_rest_of_compilation;
2983 /* Initialize some variables used by the optimizers. */
2984 init_function_for_compilation ();
2986 if (! DECL_DEFER_OUTPUT (decl))
2987 TREE_ASM_WRITTEN (decl) = 1;
2989 /* Now that integrate will no longer see our rtl, we need not distinguish
2990 between the return value of this function and the return value of called
2992 rtx_equal_function_value_matters = 0;
2994 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2995 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2997 goto exit_rest_of_compilation;
3000 /* Emit code to get eh context, if needed. */
3004 /* If we are doing position-independent code generation, now
3005 is the time to output special prologues and epilogues.
3006 We do not want to do this earlier, because it just clutters
3007 up inline functions with meaningless insns. */
3012 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
3013 Note that that may have been done above, in save_for_inline_copying.
3014 The call to resume_temporary_allocation near the end of this function
3015 goes back to the usual state of affairs. This must be done after
3016 we've built up any unwinders for exception handling, and done
3017 the FINALIZE_PIC work, if necessary. */
3019 rtl_in_current_obstack ();
3021 insns = get_insns ();
3023 /* Copy any shared structure that should not be shared. */
3025 unshare_all_rtl (current_function_decl, insns);
3027 init_EXPR_INSN_LIST_cache ();
3029 #ifdef SETJMP_VIA_SAVE_AREA
3030 /* This must be performed before virutal register instantiation. */
3031 if (current_function_calls_alloca)
3032 optimize_save_area_alloca (insns);
3035 /* Instantiate all virtual registers. */
3037 instantiate_virtual_regs (current_function_decl, get_insns ());
3039 /* See if we have allocated stack slots that are not directly addressable.
3040 If so, scan all the insns and create explicit address computation
3041 for all references to such slots. */
3042 /* fixup_stack_slots (); */
3044 /* Find all the EH handlers. */
3045 find_exception_handler_labels ();
3048 open_dump_file (".01.jump", decl_printable_name (decl, 2));
3050 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
3051 are initialized and to compute whether control can drop off the end
3053 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3054 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
3055 JUMP_AFTER_REGSCAN));
3057 /* Jump optimization, and the removal of NULL pointer checks, may
3058 have reduced the number of instructions substantially. CSE, and
3059 future passes, allocate arrays whose dimensions involve the maximum
3060 instruction UID, so if we can reduce the maximum UID we'll save big on
3062 renumber_insns (rtl_dump_file);
3064 /* Dump rtl code after jump, if we are doing that. */
3066 close_dump_file (print_rtl, insns);
3068 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
3069 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
3070 goto exit_rest_of_compilation;
3072 /* Try to identify useless null pointer tests and delete them. */
3073 if (flag_delete_null_pointer_checks)
3074 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3079 /* Perform common subexpression elimination.
3080 Nonzero value from `cse_main' means that jumps were simplified
3081 and some code may now be unreachable, so do
3082 jump optimization again. */
3087 open_dump_file (".02.cse", decl_printable_name (decl, 2));
3089 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
3091 if (flag_thread_jumps)
3092 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
3094 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
3096 /* If we are not running the second CSE pass, then we are no longer
3097 expecting CSE to be run. */
3098 cse_not_expected = !flag_rerun_cse_after_loop;
3100 if (tem || optimize > 1)
3101 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3103 !JUMP_AFTER_REGSCAN));
3105 /* Run this after jump optmizations remove all the unreachable code
3106 so that unreachable code will not keep values live. */
3107 TIMEVAR (cse_time, delete_trivially_dead_insns (insns, max_reg_num ()));
3109 /* Try to identify useless null pointer tests and delete them. */
3110 if (flag_delete_null_pointer_checks)
3111 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3113 /* The second pass of jump optimization is likely to have
3114 removed a bunch more instructions. */
3115 renumber_insns (rtl_dump_file);
3117 /* Dump rtl code after cse, if we are doing that. */
3120 close_dump_file (print_rtl, insns);
3121 if (graph_dump_format != no_graph)
3122 print_rtl_graph_with_bb (dump_base_name, ".02.cse", insns);
3126 purge_addressof (insns);
3127 reg_scan (insns, max_reg_num (), 1);
3131 dump_rtl (".03.addressof", decl, print_rtl, insns);
3132 if (graph_dump_format != no_graph)
3133 print_rtl_graph_with_bb (dump_base_name, ".03.addressof", insns);
3142 open_dump_file (".033.ssa", decl_printable_name (decl, 2));
3145 close_dump_file (print_rtl_with_bb, insns);
3148 open_dump_file (".037.ussa", decl_printable_name (decl, 2));
3149 convert_from_ssa ();
3150 /* New registers have been created. Rescan their usage. */
3151 reg_scan (insns, max_reg_num (), 1);
3153 close_dump_file (print_rtl_with_bb, insns);
3155 /* Life analysis used in SSA adds log_links but these shouldn't
3156 be there until the flow stage, so clear them away. */
3157 clear_log_links (insns);
3163 /* Perform global cse. */
3165 if (optimize > 0 && flag_gcse)
3168 open_dump_file (".04.gcse", decl_printable_name (decl, 2));
3170 TIMEVAR (gcse_time, tem = gcse_main (insns, rtl_dump_file));
3172 /* If gcse altered any jumps, rerun jump optimizations to clean
3176 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3178 !JUMP_AFTER_REGSCAN));
3183 close_dump_file (print_rtl, insns);
3184 if (graph_dump_format != no_graph)
3185 print_rtl_graph_with_bb (dump_base_name, ".04.gcse", insns);
3191 /* Move constant computations out of loops. */
3196 open_dump_file (".05.loop", decl_printable_name (decl, 2));
3201 if (flag_rerun_loop_opt)
3203 /* We only want to perform unrolling once. */
3205 loop_optimize (insns, rtl_dump_file, 0, 0);
3208 /* The first call to loop_optimize makes some instructions
3209 trivially dead. We delete those instructions now in the
3210 hope that doing so will make the heuristics in loop work
3211 better and possibly speed up compilation. */
3212 delete_trivially_dead_insns (insns, max_reg_num ());
3214 /* The regscan pass is currently necessary as the alias
3215 analysis code depends on this information. */
3216 reg_scan (insns, max_reg_num (), 1);
3218 loop_optimize (insns, rtl_dump_file, flag_unroll_loops, 1);
3221 /* Dump rtl code after loop opt, if we are doing that. */
3225 close_dump_file (print_rtl, insns);
3226 if (graph_dump_format != no_graph)
3227 print_rtl_graph_with_bb (dump_base_name, ".05.loop", insns);
3234 /* ??? Well, nearly. If HAVE_conditional_arithmetic, jump_optimize
3235 has put off all if-conversion until "after CSE". If we put this
3236 off any longer we may miss out doing if-conversion entirely. */
3237 cse_not_expected = 1;
3242 open_dump_file (".06.cse2", decl_printable_name (decl, 2));
3244 if (flag_rerun_cse_after_loop)
3246 /* Running another jump optimization pass before the second
3247 cse pass sometimes simplifies the RTL enough to allow
3248 the second CSE pass to do a better job. Jump_optimize can change
3249 max_reg_num so we must rerun reg_scan afterwards.
3250 ??? Rework to not call reg_scan so often. */
3251 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3252 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3254 JUMP_AFTER_REGSCAN));
3256 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3257 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3260 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3262 !JUMP_AFTER_REGSCAN));
3265 if (flag_thread_jumps)
3267 /* This pass of jump threading straightens out code
3268 that was kinked by loop optimization. */
3269 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3270 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3273 /* Dump rtl code after cse, if we are doing that. */
3276 close_dump_file (print_rtl, insns);
3277 if (graph_dump_format != no_graph)
3278 print_rtl_graph_with_bb (dump_base_name, ".06.cse2", insns);
3285 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3287 if (branch_prob_dump)
3288 open_dump_file (".07.bp", decl_printable_name (decl, 2));
3293 branch_prob (insns, rtl_dump_file);
3296 if (branch_prob_dump)
3298 close_dump_file (print_rtl, insns);
3299 if (graph_dump_format != no_graph)
3300 print_rtl_graph_with_bb (dump_base_name, ".07.bp", insns);
3309 /* Print function header into flow dump now
3310 because doing the flow analysis makes some of the dump. */
3313 open_dump_file (".08.flow", decl_printable_name (decl, 2));
3315 /* Do control and data flow analysis; wrote some of the results to
3321 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3322 cleanup_cfg (insns);
3324 calculate_loop_depth (rtl_dump_file);
3325 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3326 mark_constant_function ();
3329 if (warn_uninitialized || extra_warnings)
3331 uninitialized_vars_warning (DECL_INITIAL (decl));
3333 setjmp_args_warning ();
3336 /* Dump rtl after flow analysis. */
3340 close_dump_file (print_rtl_with_bb, insns);
3341 if (graph_dump_format != no_graph)
3342 print_rtl_graph_with_bb (dump_base_name, ".08.flow", insns);
3348 /* The first life analysis pass has finished. From now on we can not
3349 generate any new pseudos. */
3352 /* If -opt, try combining insns through substitution. */
3356 int rebuild_jump_labels_after_combine = 0;
3358 TIMEVAR (combine_time,
3360 rebuild_jump_labels_after_combine
3361 = combine_instructions (insns, max_reg_num ());
3364 /* Combining insns may have turned an indirect jump into a
3365 direct jump. Rebuid the JUMP_LABEL fields of jumping
3367 if (rebuild_jump_labels_after_combine)
3369 TIMEVAR (jump_time, rebuild_jump_labels (insns));
3372 /* Dump rtl code after insn combination. */
3376 dump_rtl (".09.combine", decl, print_rtl_with_bb, insns);
3377 if (graph_dump_format != no_graph)
3378 print_rtl_graph_with_bb (dump_base_name, ".09.combine", insns);
3385 /* Register allocation pre-pass, to reduce number of moves
3386 necessary for two-address machines. */
3387 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3390 open_dump_file (".10.regmove", decl_printable_name (decl, 2));
3392 TIMEVAR (regmove_time, regmove_optimize (insns, max_reg_num (),
3397 close_dump_file (print_rtl_with_bb, insns);
3398 if (graph_dump_format != no_graph)
3399 print_rtl_graph_with_bb (dump_base_name, ".10.regmove", insns);
3406 if (optimize && n_basic_blocks)
3408 TIMEVAR (gcse_time, optimize_mode_switching (NULL_PTR));
3411 #ifdef INSN_SCHEDULING
3413 /* Print function header into sched dump now
3414 because doing the sched analysis makes some of the dump. */
3415 if (optimize > 0 && flag_schedule_insns)
3418 open_dump_file (".11.sched", decl_printable_name (decl, 2));
3420 /* Do control and data sched analysis,
3421 and write some of the results to dump file. */
3423 TIMEVAR (sched_time, schedule_insns (rtl_dump_file));
3425 /* Dump rtl after instruction scheduling. */
3429 close_dump_file (print_rtl_with_bb, insns);
3430 if (graph_dump_format != no_graph)
3431 print_rtl_graph_with_bb (dump_base_name, ".11.sched", insns);
3439 /* Determine if the current function is a leaf before running reload
3440 since this can impact optimizations done by the prologue and
3441 epilogue thus changing register elimination offsets. */
3442 current_function_is_leaf = leaf_function_p ();
3445 open_dump_file (".12.lreg", decl_printable_name (decl, 2));
3447 /* Allocate pseudo-regs that are used only within 1 basic block.
3449 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3450 jump optimizer after register allocation and reloading are finished. */
3452 TIMEVAR (local_alloc_time,
3454 /* We recomputed reg usage as part of updating the rest
3455 of life info during sched. */
3456 if (! flag_schedule_insns)
3457 recompute_reg_usage (insns, ! optimize_size);
3458 regclass (insns, max_reg_num (), rtl_dump_file);
3459 rebuild_label_notes_after_reload = local_alloc ();
3462 /* Dump rtl code after allocating regs within basic blocks. */
3466 TIMEVAR (dump_time, dump_flow_info (rtl_dump_file));
3467 TIMEVAR (dump_time, dump_local_alloc (rtl_dump_file));
3469 close_dump_file (print_rtl_with_bb, insns);
3470 if (graph_dump_format != no_graph)
3471 print_rtl_graph_with_bb (dump_base_name, ".12.lreg", insns);
3477 if (global_reg_dump)
3478 open_dump_file (".13.greg", decl_printable_name (decl, 2));
3480 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3481 pass fixing up any insns that are invalid. */
3483 TIMEVAR (global_alloc_time,
3486 failure = global_alloc (rtl_dump_file);
3489 build_insn_chain (insns);
3490 failure = reload (insns, 0, rtl_dump_file);
3495 goto exit_rest_of_compilation;
3500 /* Do a very simple CSE pass over just the hard registers. */
3502 reload_cse_regs (insns);
3504 /* If optimizing and we are performing instruction scheduling after
3505 reload, then go ahead and split insns now since we are about to
3506 recompute flow information anyway.
3508 reload_cse_regs may expose more splitting opportunities, expecially
3509 for double-word operations. */
3510 if (optimize > 0 && flag_schedule_insns_after_reload)
3511 split_all_insns (0);
3513 /* Register allocation and reloading may have turned an indirect jump into
3514 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3515 jumping instructions. */
3516 if (rebuild_label_notes_after_reload)
3517 TIMEVAR (jump_time, rebuild_jump_labels (insns));
3519 if (global_reg_dump)
3521 TIMEVAR (dump_time, dump_global_regs (rtl_dump_file));
3522 close_dump_file (print_rtl_with_bb, insns);
3523 if (graph_dump_format != no_graph)
3524 print_rtl_graph_with_bb (dump_base_name, ".13.greg", insns);
3527 /* Re-create the death notes which were deleted during reload. */
3529 open_dump_file (".14.flow2", decl_printable_name (decl, 2));
3531 TIMEVAR (flow2_time,
3533 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3536 /* On some machines, the prologue and epilogue code, or parts thereof,
3537 can be represented as RTL. Doing so lets us schedule insns between
3538 it and the rest of the code and also allows delayed branch
3539 scheduling to operate in the epilogue. */
3540 thread_prologue_and_epilogue_insns (insns);
3547 cleanup_cfg (insns);
3548 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3555 flow2_completed = 1;
3559 close_dump_file (print_rtl_with_bb, insns);
3560 if (graph_dump_format != no_graph)
3561 print_rtl_graph_with_bb (dump_base_name, ".14.flow2", insns);
3564 #ifdef HAVE_peephole2
3565 if (optimize > 0 && flag_peephole2)
3568 open_dump_file (".15.peephole2", decl_printable_name (decl, 2));
3570 TIMEVAR (peephole2_time, peephole2_optimize (rtl_dump_file));
3574 close_dump_file (print_rtl_with_bb, insns);
3575 if (graph_dump_format != no_graph)
3576 print_rtl_graph_with_bb (dump_base_name, ".15.peephole2", insns);
3581 #ifdef INSN_SCHEDULING
3582 if (optimize > 0 && flag_schedule_insns_after_reload)
3585 open_dump_file (".16.sched2", decl_printable_name (decl, 2));
3587 /* Do control and data sched analysis again,
3588 and write some more of the results to dump file. */
3590 TIMEVAR (sched2_time, schedule_insns (rtl_dump_file));
3592 /* Dump rtl after post-reorder instruction scheduling. */
3596 close_dump_file (print_rtl_with_bb, insns);
3597 if (graph_dump_format != no_graph)
3598 print_rtl_graph_with_bb (dump_base_name, ".16.sched2", insns);
3606 #ifdef LEAF_REGISTERS
3607 current_function_uses_only_leaf_regs
3608 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3611 if (optimize > 0 && flag_reorder_blocks)
3613 if (reorder_blocks_dump)
3614 open_dump_file (".bbro", decl_printable_name (decl, 2));
3616 TIMEVAR (reorder_blocks_time, reorder_basic_blocks ());
3618 if (reorder_blocks_dump)
3620 close_dump_file (print_rtl_with_bb, insns);
3621 if (graph_dump_format != no_graph)
3622 print_rtl_graph_with_bb (dump_base_name, ".bbro", insns);
3626 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3627 Also do cross-jumping this time and delete no-op move insns. */
3631 TIMEVAR (jump_time, jump_optimize (insns, JUMP_CROSS_JUMP,
3633 !JUMP_AFTER_REGSCAN));
3635 /* Dump rtl code after jump, if we are doing that. */
3639 dump_rtl (".17.jump2", decl, print_rtl_with_bb, insns);
3640 if (graph_dump_format != no_graph)
3641 print_rtl_graph_with_bb (dump_base_name, ".17.jump2", insns);
3645 /* If a machine dependent reorganization is needed, call it. */
3646 #ifdef MACHINE_DEPENDENT_REORG
3647 if (mach_dep_reorg_dump)
3648 open_dump_file (".18.mach", decl_printable_name (decl, 2));
3650 MACHINE_DEPENDENT_REORG (insns);
3652 if (mach_dep_reorg_dump)
3654 close_dump_file (print_rtl_with_bb, insns);
3655 if (graph_dump_format != no_graph)
3656 print_rtl_graph_with_bb (dump_base_name, ".18.mach", insns);
3663 /* If a scheduling pass for delayed branches is to be done,
3664 call the scheduling code. */
3667 if (optimize > 0 && flag_delayed_branch)
3670 open_dump_file (".19.dbr", decl_printable_name (decl, 2));
3675 dbr_schedule (insns, rtl_dump_file);
3680 close_dump_file (print_rtl_with_bb, insns);
3681 if (graph_dump_format != no_graph)
3682 print_rtl_graph_with_bb (dump_base_name, ".19.dbr", insns);
3690 /* Shorten branches.
3692 Note this must run before reg-stack because of death note (ab)use
3693 in the ia32 backend. */
3694 TIMEVAR (shorten_branch_time,
3696 shorten_branches (get_insns ());
3701 open_dump_file (".20.stack", decl_printable_name (decl, 2));
3703 TIMEVAR (stack_reg_time, reg_to_stack (insns, rtl_dump_file));
3707 close_dump_file (print_rtl_with_bb, insns);
3708 if (graph_dump_format != no_graph)
3709 print_rtl_graph_with_bb (dump_base_name, ".20.stack", insns);
3716 current_function_nothrow = nothrow_function_p ();
3717 if (current_function_nothrow)
3718 /* Now we know that this can't throw; set the flag for the benefit
3719 of other functions later in this translation unit. */
3720 TREE_NOTHROW (current_function_decl) = 1;
3722 /* Now turn the rtl into assembler code. */
3724 TIMEVAR (final_time,
3729 /* Get the function's name, as described by its RTL.
3730 This may be different from the DECL_NAME name used
3731 in the source file. */
3733 x = DECL_RTL (decl);
3734 if (GET_CODE (x) != MEM)
3737 if (GET_CODE (x) != SYMBOL_REF)
3739 fnname = XSTR (x, 0);
3741 assemble_start_function (decl, fnname);
3742 final_start_function (insns, asm_out_file, optimize);
3743 final (insns, asm_out_file, optimize, 0);
3744 final_end_function (insns, asm_out_file, optimize);
3745 assemble_end_function (decl, fnname);
3747 fflush (asm_out_file);
3749 /* Release all memory allocated by flow. */
3750 free_basic_block_vars (0);
3752 /* Release all memory held by regsets now */
3753 regset_release_memory ();
3759 /* Write DBX symbols if requested */
3761 /* Note that for those inline functions where we don't initially
3762 know for certain that we will be generating an out-of-line copy,
3763 the first invocation of this routine (rest_of_compilation) will
3764 skip over this code by doing a `goto exit_rest_of_compilation;'.
3765 Later on, finish_compilation will call rest_of_compilation again
3766 for those inline functions that need to have out-of-line copies
3767 generated. During that call, we *will* be routed past here. */
3769 #ifdef DBX_DEBUGGING_INFO
3770 if (write_symbols == DBX_DEBUG)
3771 TIMEVAR (symout_time, dbxout_function (decl));
3774 #ifdef DWARF_DEBUGGING_INFO
3775 if (write_symbols == DWARF_DEBUG)
3776 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3779 #ifdef DWARF2_DEBUGGING_INFO
3780 if (write_symbols == DWARF2_DEBUG)
3781 TIMEVAR (symout_time, dwarf2out_decl (decl));
3784 exit_rest_of_compilation:
3786 /* In case the function was not output,
3787 don't leave any temporary anonymous types
3788 queued up for sdb output. */
3789 #ifdef SDB_DEBUGGING_INFO
3790 if (write_symbols == SDB_DEBUG)
3791 sdbout_types (NULL_TREE);
3794 reload_completed = 0;
3795 flow2_completed = 0;
3798 TIMEVAR (final_time,
3800 /* Clear out the insn_length contents now that they are no
3802 init_insn_lengths ();
3804 /* Clear out the real_constant_chain before some of the rtx's
3805 it runs through become garbage. */
3806 clear_const_double_mem ();
3808 /* Cancel the effect of rtl_in_current_obstack. */
3809 resume_temporary_allocation ();
3811 /* Show no temporary slots allocated. */
3814 free_basic_block_vars (0);
3817 /* Make sure volatile mem refs aren't considered valid operands for
3818 arithmetic insns. We must call this here if this is a nested inline
3819 function, since the above code leaves us in the init_recog state
3820 (from final.c), and the function context push/pop code does not
3821 save/restore volatile_ok.
3823 ??? Maybe it isn't necessary for expand_start_function to call this
3824 anymore if we do it here? */
3826 init_recog_no_volatile ();
3828 /* We're done with this function. Free up memory if we can. */
3829 free_after_parsing (cfun);
3830 if (! DECL_DEFER_OUTPUT (decl))
3831 free_after_compilation (cfun);
3837 /* The parsing time is all the time spent in yyparse
3838 *except* what is spent in this function. */
3840 parse_time -= get_run_time () - start_time;
3851 printf ("Usage: %s input [switches]\n", progname);
3852 printf ("Switches:\n");
3854 printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
3855 printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
3856 printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
3857 printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
3859 for (i = NUM_ELEM (f_options); i--;)
3861 const char * description = f_options[i].description;
3863 if (description != NULL && * description != 0)
3864 printf (" -f%-21s %s\n",
3865 f_options[i].string, description);
3868 printf (" -O[number] Set optimisation level to [number]\n");
3869 printf (" -Os Optimise for space rather than speed\n");
3870 printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
3871 printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
3872 printf (" -w Suppress warnings\n");
3873 printf (" -W Enable extra warnings\n");
3875 for (i = NUM_ELEM (W_options); i--;)
3877 const char * description = W_options[i].description;
3879 if (description != NULL && * description != 0)
3880 printf (" -W%-21s %s\n",
3881 W_options[i].string, description);
3884 printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
3885 printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
3886 printf (" -p Enable function profiling\n");
3887 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3888 printf (" -a Enable block profiling \n");
3890 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3891 printf (" -ax Enable jump profiling \n");
3893 printf (" -o <file> Place output into <file> \n");
3894 printf (" -G <number> Put global and static data smaller than <number>\n");
3895 printf (" bytes into a special section (on some targets)\n");
3897 for (i = NUM_ELEM (debug_args); i--;)
3899 if (debug_args[i].description != NULL)
3900 printf (" -g%-21s %s\n", debug_args[i].arg, debug_args[i].description);
3903 printf (" -aux-info <file> Emit declaration info into <file>.X\n");
3904 printf (" -quiet Do not display functions compiled or elapsed time\n");
3905 printf (" -version Display the compiler's version\n");
3906 printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
3907 printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
3908 #if defined INSN_SCHEDULING
3909 printf (" -sched-verbose=<number> Set the verbosity level of the scheduler\n");
3911 printf (" --help Display this information\n");
3916 /* Display descriptions of language specific options.
3917 If there is no description, note that there is an undocumented option.
3918 If the description is empty, do not display anything. (This allows
3919 options to be deliberately undocumented, for whatever reason).
3920 If the option string is missing, then this is a marker, indicating
3921 that the description string is in fact the name of a language, whose
3922 language specific options are to follow. */
3924 if (NUM_ELEM (documented_lang_options) > 1)
3926 printf ("\nLanguage specific options:\n");
3928 for (i = 0; i < NUM_ELEM (documented_lang_options); i++)
3930 const char * description = documented_lang_options[i].description;
3931 const char * option = documented_lang_options[i].option;
3933 if (description == NULL)
3938 printf (" %-23.23s [undocumented]\n", option);
3940 else if (* description == 0)
3942 else if (option == NULL)
3946 ("\nThere are undocumented %s specific options as well.\n",
3950 printf ("\n Options for %s:\n", description);
3955 printf (" %-23.23s %s\n", option, description);
3960 printf ("\nThere are undocumented %s specific options as well.\n", lang);
3962 if (NUM_ELEM (target_switches) > 1
3963 #ifdef TARGET_OPTIONS
3964 || NUM_ELEM (target_options) > 1
3972 printf ("\nTarget specific options:\n");
3974 for (i = NUM_ELEM (target_switches); i--;)
3976 const char * option = target_switches[i].name;
3977 const char * description = target_switches[i].description;
3979 if (option == NULL || * option == 0)
3981 else if (description == NULL)
3986 printf (" -m%-21.21s [undocumented]\n", option);
3988 else if (* description != 0)
3989 doc += printf (" -m%-21.21s %s\n", option, description);
3992 #ifdef TARGET_OPTIONS
3993 for (i = NUM_ELEM (target_options); i--;)
3995 const char * option = target_options[i].prefix;
3996 const char * description = target_options[i].description;
3998 if (option == NULL || * option == 0)
4000 else if (description == NULL)
4005 printf (" -m%-21.21s [undocumented]\n", option);
4007 else if (* description != 0)
4008 doc += printf (" -m%-21.21s %s\n", option, description);
4014 printf ("\nThere are undocumented target specific options as well.\n");
4016 printf (" They exist, but they are not documented.\n");
4021 /* Parse a -d... comand line switch. */
4024 decode_d_option (arg)
4031 branch_prob_dump = 1;
4036 reorder_blocks_dump = 1;
4039 global_reg_dump = 1;
4055 #ifdef MACHINE_DEPENDENT_REORG
4056 mach_dep_reorg_dump = 1;
4065 branch_prob_dump = 1;
4068 reorder_blocks_dump = 1;
4088 global_reg_dump = 1;
4113 #ifdef MACHINE_DEPENDENT_REORG
4115 mach_dep_reorg_dump = 1;
4119 flag_print_asm_name = 1;
4140 graph_dump_format = vcg;
4146 rtl_dump_and_exit = 1;
4154 case 'D': /* These are handled by the preprocessor. */
4158 warning ("unrecognized gcc debugging option: %c", arg[-1]);
4163 /* Parse a -f... comand line switch. ARG is the value after the -f.
4164 It is safe to access 'ARG - 2' to generate the full switch name.
4165 Return the number of strings consumed. */
4168 decode_f_option (arg)
4173 /* Search for the option in the table of binary f options. */
4174 for (j = sizeof (f_options) / sizeof (f_options[0]); j--;)
4176 if (!strcmp (arg, f_options[j].string))
4178 *f_options[j].variable = f_options[j].on_value;
4182 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4183 && ! strcmp (arg + 3, f_options[j].string))
4185 *f_options[j].variable = ! f_options[j].on_value;
4190 if (!strncmp (arg, "inline-limit-", 13)
4191 || !strncmp (arg, "inline-limit=", 13))
4193 read_integral_parameter (arg + 13, arg - 2, inline_max_insns);
4194 #ifdef INSN_SCHEDULING
4195 else if (!strncmp (arg, "sched-verbose=", 14))
4196 fix_sched_param ("verbose", (const char *)(arg + 14));
4198 else if (!strncmp (arg, "fixed-", 6))
4199 fix_register ((const char *)(arg + 6), 1, 1);
4200 else if (!strncmp (arg, "call-used-", 10))
4201 fix_register ((const char *)(arg + 10), 0, 1);
4202 else if (!strncmp (arg, "call-saved-", 11))
4203 fix_register ((const char *)(arg + 11), 0, 0);
4204 else if (!strncmp (arg, "align-loops=", 12))
4205 align_loops = read_integral_parameter (arg + 12, arg - 2, align_loops);
4206 else if (!strncmp (arg, "align-functions=", 16))
4208 = read_integral_parameter (arg + 16, arg - 2, align_functions);
4209 else if (!strncmp (arg, "align-jumps=", 12))
4210 align_jumps = read_integral_parameter (arg + 12, arg - 2, align_jumps);
4211 else if (!strncmp (arg, "align-labels=", 13))
4212 align_labels = read_integral_parameter (arg + 13, arg - 2, align_labels);
4213 else if (!strncmp (arg, "stack-limit-register=", 21))
4215 int reg = decode_reg_name (arg + 21);
4217 error ("unrecognized register name `%s'", arg + 21);
4219 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
4221 else if (!strncmp (arg, "stack-limit-symbol=", 19))
4225 nm = ggc_alloc_string (arg + 19, strlen (arg + 19));
4227 nm = xstrdup (arg + 19);
4228 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
4230 else if (!strcmp (arg, "no-stack-limit"))
4231 stack_limit_rtx = NULL_RTX;
4232 else if (!strcmp (arg, "preprocessed"))
4233 /* Recognise this switch but do nothing. This prevents warnings
4234 about an unrecognized switch if cpplib has not been linked in. */
4242 /* Parse a -W... comand line switch. ARG is the value after the -W.
4243 It is safe to access 'ARG - 2' to generate the full switch name.
4244 Return the number of strings consumed. */
4247 decode_W_option (arg)
4252 /* Search for the option in the table of binary W options. */
4254 for (j = sizeof (W_options) / sizeof (W_options[0]); j--;)
4256 if (!strcmp (arg, W_options[j].string))
4258 *W_options[j].variable = W_options[j].on_value;
4262 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4263 && ! strcmp (arg + 3, W_options[j].string))
4265 *W_options[j].variable = ! W_options[j].on_value;
4270 if (!strncmp (arg, "id-clash-", 9))
4272 id_clash_len = read_integral_parameter (arg + 9, arg - 2, -1);
4274 if (id_clash_len != -1)
4277 else if (!strncmp (arg, "larger-than-", 12))
4279 larger_than_size = read_integral_parameter (arg + 12, arg - 2, -1);
4281 if (larger_than_size != -1)
4282 warn_larger_than = 1;
4290 /* Parse a -g... comand line switch. ARG is the value after the -g.
4291 It is safe to access 'ARG - 2' to generate the full switch name.
4292 Return the number of strings consumed. */
4295 decode_g_option (arg)
4299 /* A lot of code assumes write_symbols == NO_DEBUG if the
4300 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4301 of what debugging type has been selected). This records the
4302 selected type. It is an error to specify more than one
4304 static enum debug_info_type selected_debug_type = NO_DEBUG;
4305 /* Non-zero if debugging format has been explicitly set.
4306 -g and -ggdb don't explicitly set the debugging format so
4307 -gdwarf -g3 is equivalent to -gdwarf3. */
4308 static int type_explicitly_set_p = 0;
4309 /* Indexed by enum debug_info_type. */
4310 static const char * debug_type_names[] =
4312 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4315 /* The maximum admissible debug level value. */
4316 static const unsigned max_debug_level = 3;
4318 /* Look up ARG in the table. */
4319 for (da = debug_args; da->arg; da++)
4321 const int da_len = strlen (da->arg);
4323 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4325 enum debug_info_type type = da->debug_type;
4326 const char * p = arg + da_len;
4328 if (*p && (*p < '0' || *p > '9'))
4331 /* A debug flag without a level defaults to level 2.
4332 Note we do not want to call read_integral_parameter
4333 for that case since it will call atoi which
4336 ??? We may want to generalize the interface to
4337 read_integral_parameter to better handle this case
4338 if this case shows up often. */
4340 level = read_integral_parameter (p, 0, max_debug_level + 1);
4344 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
4346 error ("use -gdwarf -g%d for DWARF v1, level %d",
4349 error ("use -gdwarf-2 for DWARF v2");
4352 if (level > max_debug_level)
4355 ignoring option `%s' due to invalid debug level specification",
4357 level = debug_info_level;
4360 if (type == NO_DEBUG)
4362 type = PREFERRED_DEBUGGING_TYPE;
4364 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
4366 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4367 type = DWARF2_DEBUG;
4369 #ifdef DBX_DEBUGGING_INFO
4376 if (type == NO_DEBUG)
4377 warning ("`%s': unknown or unsupported -g option", arg - 2);
4379 /* Does it conflict with an already selected type? */
4380 if (type_explicitly_set_p
4381 /* -g/-ggdb don't conflict with anything */
4382 && da->debug_type != NO_DEBUG
4383 && type != selected_debug_type)
4384 warning ("`%s' ignored, conflicts with `-g%s'",
4385 arg - 2, debug_type_names[(int) selected_debug_type]);
4388 /* If the format has already been set, -g/-ggdb
4389 only change the debug level. */
4390 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4391 ; /* don't change debugging type */
4394 selected_debug_type = type;
4395 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4398 write_symbols = (level == 0
4400 : selected_debug_type);
4401 use_gnu_debug_info_extensions = da->use_extensions_p;
4402 debug_info_level = (enum debug_info_level) level;
4410 warning ("`%s': unknown or unsupported -g option", arg - 2);
4415 /* Decode the first argument in the argv as a language-independent option.
4416 Return the number of strings consumed. 'strings_processed' is the
4417 number of strings that have already been decoded in a language
4418 specific fashion before this function was invoked. */
4421 independent_decode_option (argc, argv, strings_processed)
4424 unsigned strings_processed ATTRIBUTE_UNUSED;
4426 char * arg = argv[0];
4428 if (arg[0] != '-' || arg[1] == 0)
4440 if (!strcmp (arg, "-help"))
4455 /* Already been treated in main (). Do nothing. */
4459 set_target_switch (arg + 1);
4463 return decode_f_option (arg + 1);
4466 return decode_g_option (arg + 1);
4469 if (!strcmp (arg, "dumpbase"))
4474 dump_base_name = argv[1];
4478 decode_d_option (arg + 1);
4482 if (!strcmp (arg, "pedantic"))
4484 else if (!strcmp (arg, "pedantic-errors"))
4485 flag_pedantic_errors = pedantic = 1;
4486 else if (arg[1] == 0)
4493 if (!strcmp (arg, "quiet"))
4500 if (!strcmp (arg, "version"))
4508 inhibit_warnings = 1;
4517 /* We save the value of warn_uninitialized, since if they put
4518 -Wuninitialized on the command line, we need to generate a
4519 warning about not using it without also specifying -O. */
4520 if (warn_uninitialized != 1)
4521 warn_uninitialized = 2;
4524 return decode_W_option (arg + 1);
4530 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4531 warning ("`-a' option (basic block profile) not supported");
4533 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4536 else if (!strcmp (arg, "ax"))
4538 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4539 warning ("`-ax' option (jump profiling) not supported");
4541 profile_block_flag = (!profile_block_flag
4542 || profile_block_flag == 2) ? 2 : 3;
4545 else if (!strncmp (arg, "aux-info", 8))
4547 flag_gen_aux_info = 1;
4553 aux_info_file_name = argv[1];
4557 aux_info_file_name = arg + 8;
4569 asm_file_name = argv[1];
4584 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4589 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4593 if (g_switch_val == -1)
4597 g_switch_set = TRUE;
4598 g_switch_value = g_switch_val;
4608 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4609 Exit code is 35 if can't open files, 34 if fatal error,
4610 33 if had nonfatal errors, else success. */
4612 extern int main PARAMS ((int, char **));
4622 /* save in case md file wants to emit args as a comment. */
4626 p = argv[0] + strlen (argv[0]);
4627 while (p != argv[0] && p[-1] != '/'
4628 #ifdef DIR_SEPARATOR
4629 && p[-1] != DIR_SEPARATOR
4635 #ifdef HAVE_LC_MESSAGES
4636 setlocale (LC_MESSAGES, "");
4638 (void) bindtextdomain (PACKAGE, localedir);
4639 (void) textdomain (PACKAGE);
4641 signal (SIGFPE, float_signal);
4644 signal (SIGPIPE, pipe_closed);
4647 decl_printable_name = decl_name;
4648 lang_expand_expr = (lang_expand_expr_t) do_abort;
4650 /* Initialize whether `char' is signed. */
4651 flag_signed_char = DEFAULT_SIGNED_CHAR;
4652 #ifdef DEFAULT_SHORT_ENUMS
4653 /* Initialize how much space enums occupy, by default. */
4654 flag_short_enums = DEFAULT_SHORT_ENUMS;
4657 /* Initialize the garbage-collector. */
4659 ggc_add_root (&input_file_stack, 1, sizeof input_file_stack,
4661 ggc_add_rtx_root (&stack_limit_rtx, 1);
4662 ggc_add_tree_root (¤t_function_decl, 1);
4663 ggc_add_tree_root (¤t_function_func_begin_label, 1);
4665 /* Perform language-specific options intialization. */
4666 lang_init_options ();
4668 /* Scan to see what optimization level has been specified. That will
4669 determine the default value of many flags. */
4670 for (i = 1; i < argc; i++)
4672 if (!strcmp (argv[i], "-O"))
4677 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4679 /* Handle -Os, -O2, -O3, -O69, ... */
4680 char *p = &argv[i][2];
4682 if ((p[0] == 's') && (p[1] == 0))
4686 /* Optimizing for size forces optimize to be 2. */
4691 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4692 if (optimize_val != -1)
4694 optimize = optimize_val;
4704 flag_thread_jumps = 1;
4706 flag_delayed_branch = 1;
4708 #ifdef CAN_DEBUG_WITHOUT_FP
4709 flag_omit_frame_pointer = 1;
4715 flag_cse_follow_jumps = 1;
4716 flag_cse_skip_blocks = 1;
4718 flag_expensive_optimizations = 1;
4719 flag_strength_reduce = 1;
4720 flag_rerun_cse_after_loop = 1;
4721 flag_rerun_loop_opt = 1;
4722 flag_caller_saves = 1;
4725 #ifdef INSN_SCHEDULING
4726 flag_schedule_insns = 1;
4727 flag_schedule_insns_after_reload = 1;
4730 flag_strict_aliasing = 1;
4731 flag_delete_null_pointer_checks = 1;
4736 flag_inline_functions = 1;
4739 if (optimize < 2 || optimize_size)
4744 align_functions = 1;
4747 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4750 set_target_switch ("");
4752 #ifdef OPTIMIZATION_OPTIONS
4753 /* Allow default optimizations to be specified on a per-machine basis. */
4754 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4757 /* Initialize register usage now so switches may override. */
4760 /* Perform normal command line switch decoding. */
4761 for (i = 1; i < argc;)
4763 unsigned lang_processed;
4764 unsigned indep_processed;
4766 /* Give the language a chance to decode the option for itself. */
4767 lang_processed = lang_decode_option (argc - i, argv + i);
4769 /* Now see if the option also has a language independent meaning.
4770 Some options are both language specific and language independent,
4771 eg --help. It is possible that there might be options that should
4772 only be decoded in a language independent way if the were not
4773 decoded in a langauge specific way, which is why 'lang_processed'
4775 indep_processed = independent_decode_option (argc - i, argv + i,
4778 if (lang_processed || indep_processed)
4779 i += (lang_processed > indep_processed
4780 ? lang_processed : indep_processed);
4783 const char * option = NULL;
4784 const char * lang = NULL;
4787 /* It is possible that the command line switch is not valid for the
4788 current language, but it is valid for another language. In order
4789 to be compatible with previous versions of the compiler (which
4790 did not issue an error message in this case) we check for this
4791 possibilty here. If we do find a match, then if extra_warnings
4792 is set we generate a warning message, otherwise we will just
4793 ignore the option. */
4794 for (j = 0; j < NUM_ELEM (documented_lang_options); j++)
4796 option = documented_lang_options[j].option;
4799 lang = documented_lang_options[j].description;
4800 else if (! strncmp (argv[i], option, strlen (option)))
4804 if (j != NUM_ELEM (documented_lang_options))
4808 warning ("Ignoring command line option '%s'", argv[i]);
4811 (It is valid for %s but not the selected langauge)", lang);
4815 error ("Unrecognized option `%s'", argv[i]);
4821 /* Checker uses the frame pointer. */
4822 if (flag_check_memory_usage)
4823 flag_omit_frame_pointer = 0;
4827 /* Inlining does not work if not optimizing,
4828 so force it not to be done. */
4832 /* The c_decode_option and lang_decode_option functions set
4833 this to `2' if -Wall is used, so we can avoid giving out
4834 lots of errors for people who don't realize what -Wall does. */
4835 if (warn_uninitialized == 1)
4836 warning ("-Wuninitialized is not supported without -O");
4839 #ifdef OVERRIDE_OPTIONS
4840 /* Some machines may reject certain combinations of options. */
4844 if (exceptions_via_longjmp == 2)
4846 #ifdef DWARF2_UNWIND_INFO
4847 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4849 exceptions_via_longjmp = 1;
4853 /* Set up the align_*_log variables, defaulting them to 1 if they
4854 were still unset. */
4855 if (align_loops <= 0) align_loops = 1;
4856 align_loops_log = floor_log2 (align_loops*2-1);
4857 if (align_jumps <= 0) align_jumps = 1;
4858 align_jumps_log = floor_log2 (align_jumps*2-1);
4859 if (align_labels <= 0) align_labels = 1;
4860 align_labels_log = floor_log2 (align_labels*2-1);
4861 if (align_functions <= 0) align_functions = 1;
4862 align_functions_log = floor_log2 (align_functions*2-1);
4864 if (profile_block_flag == 3)
4866 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4867 profile_block_flag = 2;
4870 /* Unrolling all loops implies that standard loop unrolling must also
4872 if (flag_unroll_all_loops)
4873 flag_unroll_loops = 1;
4874 /* Loop unrolling requires that strength_reduction be on also. Silently
4875 turn on strength reduction here if it isn't already on. Also, the loop
4876 unrolling code assumes that cse will be run after loop, so that must
4877 be turned on also. */
4878 if (flag_unroll_loops)
4880 flag_strength_reduce = 1;
4881 flag_rerun_cse_after_loop = 1;
4884 /* Warn about options that are not supported on this machine. */
4885 #ifndef INSN_SCHEDULING
4886 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4887 warning ("instruction scheduling not supported on this target machine");
4890 if (flag_delayed_branch)
4891 warning ("this target machine does not have delayed branches");
4894 user_label_prefix = USER_LABEL_PREFIX;
4895 if (flag_leading_underscore != -1)
4897 /* If the default prefix is more complicated than "" or "_",
4898 issue a warning and ignore this option. */
4899 if (user_label_prefix[0] == 0 ||
4900 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4902 user_label_prefix = flag_leading_underscore ? "_" : "";
4905 warning ("-f%sleading-underscore not supported on this target machine",
4906 flag_leading_underscore ? "" : "no-");
4909 /* If we are in verbose mode, write out the version and maybe all the
4910 option flags in use. */
4913 print_version (stderr, "");
4915 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4918 compile_file (filename);
4920 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4923 char *lim = (char *) sbrk (0);
4925 fnotice (stderr, "Data size %ld.\n", (long) (lim - (char *) &environ));
4930 system ("ps -l 1>&2");
4933 #endif /* not USG */
4936 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4939 return (FATAL_EXIT_CODE);
4941 return (FATAL_EXIT_CODE);
4942 return (SUCCESS_EXIT_CODE);
4945 /* Decode -m switches. */
4946 /* Decode the switch -mNAME. */
4949 set_target_switch (name)
4953 int valid_target_option = 0;
4955 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4956 if (!strcmp (target_switches[j].name, name))
4958 if (target_switches[j].value < 0)
4959 target_flags &= ~-target_switches[j].value;
4961 target_flags |= target_switches[j].value;
4962 valid_target_option = 1;
4965 #ifdef TARGET_OPTIONS
4966 if (!valid_target_option)
4967 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4969 int len = strlen (target_options[j].prefix);
4970 if (!strncmp (target_options[j].prefix, name, len))
4972 *target_options[j].variable = name + len;
4973 valid_target_option = 1;
4978 if (!valid_target_option)
4979 error ("Invalid option `%s'", name);
4982 /* Print version information to FILE.
4983 Each line begins with INDENT (for the case where FILE is the
4984 assembler output file). */
4987 print_version (file, indent)
4992 #define __VERSION__ "[?]"
4996 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4998 "%s%s%s version %s (%s) compiled by CC.\n"
5000 , indent, *indent != 0 ? " " : "",
5001 language_string, version_string, TARGET_NAME, __VERSION__);
5004 /* Print an option value and return the adjusted position in the line.
5005 ??? We don't handle error returns from fprintf (disk full); presumably
5006 other code will catch a disk full though. */
5009 print_single_switch (file, pos, max, indent, sep, term, type, name)
5012 const char *indent, *sep, *term, *type, *name;
5014 /* The ultrix fprintf returns 0 on success, so compute the result we want
5015 here since we need it for the following test. */
5016 int len = strlen (sep) + strlen (type) + strlen (name);
5021 fprintf (file, "%s", term);
5026 fprintf (file, "%s", indent);
5027 pos = strlen (indent);
5029 fprintf (file, "%s%s%s", sep, type, name);
5034 /* Print active target switches to FILE.
5035 POS is the current cursor position and MAX is the size of a "line".
5036 Each line begins with INDENT and ends with TERM.
5037 Each switch is separated from the next by SEP. */
5040 print_switch_values (file, pos, max, indent, sep, term)
5043 const char *indent, *sep, *term;
5048 /* Print the options as passed. */
5050 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
5051 _("options passed: "), "");
5053 for (p = &save_argv[1]; *p != NULL; p++)
5057 if (strcmp (*p, "-o") == 0)
5063 if (strcmp (*p, "-quiet") == 0)
5065 if (strcmp (*p, "-version") == 0)
5070 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
5073 fprintf (file, "%s", term);
5075 /* Print the -f and -m options that have been enabled.
5076 We don't handle language specific options but printing argv
5079 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
5080 _("options enabled: "), "");
5082 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
5083 if (*f_options[j].variable == f_options[j].on_value)
5084 pos = print_single_switch (file, pos, max, indent, sep, term,
5085 "-f", f_options[j].string);
5087 /* Print target specific options. */
5089 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
5090 if (target_switches[j].name[0] != '\0'
5091 && target_switches[j].value > 0
5092 && ((target_switches[j].value & target_flags)
5093 == target_switches[j].value))
5095 pos = print_single_switch (file, pos, max, indent, sep, term,
5096 "-m", target_switches[j].name);
5099 #ifdef TARGET_OPTIONS
5100 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
5101 if (*target_options[j].variable != NULL)
5104 sprintf (prefix, "-m%s", target_options[j].prefix);
5105 pos = print_single_switch (file, pos, max, indent, sep, term,
5106 prefix, *target_options[j].variable);
5110 fprintf (file, "%s", term);
5113 /* Record the beginning of a new source file, named FILENAME. */
5116 debug_start_source_file (filename)
5117 register char *filename ATTRIBUTE_UNUSED;
5119 #ifdef DBX_DEBUGGING_INFO
5120 if (write_symbols == DBX_DEBUG)
5121 dbxout_start_new_source_file (filename);
5123 #ifdef DWARF_DEBUGGING_INFO
5124 if (debug_info_level == DINFO_LEVEL_VERBOSE
5125 && write_symbols == DWARF_DEBUG)
5126 dwarfout_start_new_source_file (filename);
5127 #endif /* DWARF_DEBUGGING_INFO */
5128 #ifdef DWARF2_DEBUGGING_INFO
5129 if (debug_info_level == DINFO_LEVEL_VERBOSE
5130 && write_symbols == DWARF2_DEBUG)
5131 dwarf2out_start_source_file (filename);
5132 #endif /* DWARF2_DEBUGGING_INFO */
5133 #ifdef SDB_DEBUGGING_INFO
5134 if (write_symbols == SDB_DEBUG)
5135 sdbout_start_new_source_file (filename);
5139 /* Record the resumption of a source file. LINENO is the line number in
5140 the source file we are returning to. */
5143 debug_end_source_file (lineno)
5144 register unsigned lineno ATTRIBUTE_UNUSED;
5146 #ifdef DBX_DEBUGGING_INFO
5147 if (write_symbols == DBX_DEBUG)
5148 dbxout_resume_previous_source_file ();
5150 #ifdef DWARF_DEBUGGING_INFO
5151 if (debug_info_level == DINFO_LEVEL_VERBOSE
5152 && write_symbols == DWARF_DEBUG)
5153 dwarfout_resume_previous_source_file (lineno);
5154 #endif /* DWARF_DEBUGGING_INFO */
5155 #ifdef DWARF2_DEBUGGING_INFO
5156 if (debug_info_level == DINFO_LEVEL_VERBOSE
5157 && write_symbols == DWARF2_DEBUG)
5158 dwarf2out_end_source_file ();
5159 #endif /* DWARF2_DEBUGGING_INFO */
5160 #ifdef SDB_DEBUGGING_INFO
5161 if (write_symbols == SDB_DEBUG)
5162 sdbout_resume_previous_source_file ();
5166 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5167 the tail part of the directive line, i.e. the part which is past the
5168 initial whitespace, #, whitespace, directive-name, whitespace part. */
5171 debug_define (lineno, buffer)
5172 register unsigned lineno ATTRIBUTE_UNUSED;
5173 register char *buffer ATTRIBUTE_UNUSED;
5175 #ifdef DWARF_DEBUGGING_INFO
5176 if (debug_info_level == DINFO_LEVEL_VERBOSE
5177 && write_symbols == DWARF_DEBUG)
5178 dwarfout_define (lineno, buffer);
5179 #endif /* DWARF_DEBUGGING_INFO */
5180 #ifdef DWARF2_DEBUGGING_INFO
5181 if (debug_info_level == DINFO_LEVEL_VERBOSE
5182 && write_symbols == DWARF2_DEBUG)
5183 dwarf2out_define (lineno, buffer);
5184 #endif /* DWARF2_DEBUGGING_INFO */
5187 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5188 the tail part of the directive line, i.e. the part which is past the
5189 initial whitespace, #, whitespace, directive-name, whitespace part. */
5192 debug_undef (lineno, buffer)
5193 register unsigned lineno ATTRIBUTE_UNUSED;
5194 register char *buffer ATTRIBUTE_UNUSED;
5196 #ifdef DWARF_DEBUGGING_INFO
5197 if (debug_info_level == DINFO_LEVEL_VERBOSE
5198 && write_symbols == DWARF_DEBUG)
5199 dwarfout_undef (lineno, buffer);
5200 #endif /* DWARF_DEBUGGING_INFO */
5201 #ifdef DWARF2_DEBUGGING_INFO
5202 if (debug_info_level == DINFO_LEVEL_VERBOSE
5203 && write_symbols == DWARF2_DEBUG)
5204 dwarf2out_undef (lineno, buffer);
5205 #endif /* DWARF2_DEBUGGING_INFO */
5208 /* Tell the debugging backend that we've decided not to emit any
5209 debugging information for BLOCK, so it can clean up after any local
5210 classes or nested functions. */
5213 debug_ignore_block (block)
5214 tree block ATTRIBUTE_UNUSED;
5216 #ifdef DWARF2_DEBUGGING_INFO
5217 if (write_symbols == DWARF2_DEBUG)
5218 dwarf2out_ignore_block (block);