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;
260 static int flag_print_mem = 0;
261 static int version_flag = 0;
262 static char * filename = 0;
263 enum graph_dump_types graph_dump_format;
265 /* Name for output file of assembly code, specified with -o. */
269 /* Value of the -G xx switch, and whether it was passed or not. */
273 /* Type(s) of debugging information we are producing (if any).
274 See flags.h for the definitions of the different possible
275 types of debugging information. */
276 enum debug_info_type write_symbols = NO_DEBUG;
278 /* Level of debugging information we are producing. See flags.h
279 for the definitions of the different possible levels. */
280 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
282 /* Nonzero means use GNU-only extensions in the generated symbolic
283 debugging information. */
284 /* Currently, this only has an effect when write_symbols is set to
285 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
286 int use_gnu_debug_info_extensions = 0;
288 /* Nonzero means do optimizations. -O.
289 Particular numeric values stand for particular amounts of optimization;
290 thus, -O2 stores 2 here. However, the optimizations beyond the basic
291 ones are not controlled directly by this variable. Instead, they are
292 controlled by individual `flag_...' variables that are defaulted
293 based on this variable. */
297 /* Nonzero means optimize for size. -Os.
298 The only valid values are zero and non-zero. When optimize_size is
299 non-zero, optimize defaults to 2, but certain individual code
300 bloating optimizations are disabled. */
302 int optimize_size = 0;
304 /* Number of error messages and warning messages so far. */
307 int warningcount = 0;
310 /* Pointer to function to compute the name to use to print a declaration.
311 DECL is the declaration in question.
312 VERBOSITY determines what information will be printed:
313 0: DECL_NAME, demangled as necessary.
314 1: and scope information.
315 2: and any other information that might be interesting, such as function
316 parameter types in C++. */
318 const char *(*decl_printable_name) PARAMS ((tree, int));
320 /* Pointer to function to compute rtl for a language-specific tree code. */
322 typedef rtx (*lang_expand_expr_t)
323 PARAMS ((union tree_node *, rtx, enum machine_mode,
324 enum expand_modifier modifier));
326 lang_expand_expr_t lang_expand_expr = 0;
328 tree (*lang_expand_constant) PARAMS ((tree)) = 0;
330 /* Pointer to function to finish handling an incomplete decl at the
331 end of compilation. */
333 void (*incomplete_decl_finalize_hook) PARAMS ((tree)) = 0;
335 /* Nonzero if generating code to do profiling. */
337 int profile_flag = 0;
339 /* Nonzero if generating code to do profiling on a line-by-line basis. */
341 int profile_block_flag;
343 /* Nonzero if generating code to profile program flow graph arcs. */
345 int profile_arc_flag = 0;
347 /* Nonzero if generating info for gcov to calculate line test coverage. */
349 int flag_test_coverage = 0;
351 /* Nonzero indicates that branch taken probabilities should be calculated. */
353 int flag_branch_probabilities = 0;
355 /* Nonzero if basic blocks should be reordered. */
357 int flag_reorder_blocks = 0;
359 /* Nonzero for -pedantic switch: warn about anything
360 that standard spec forbids. */
364 /* Temporarily suppress certain warnings.
365 This is set while reading code from a system header file. */
367 int in_system_header = 0;
369 /* Don't print functions as they are compiled and don't print
370 times taken by the various passes. -quiet. */
376 /* Nonzero means `char' should be signed. */
378 int flag_signed_char;
380 /* Nonzero means give an enum type only as many bytes as it needs. */
382 int flag_short_enums;
384 /* Nonzero for -fcaller-saves: allocate values in regs that need to
385 be saved across function calls, if that produces overall better code.
386 Optional now, so people can test it. */
388 #ifdef DEFAULT_CALLER_SAVES
389 int flag_caller_saves = 1;
391 int flag_caller_saves = 0;
394 /* Nonzero if structures and unions should be returned in memory.
396 This should only be defined if compatibility with another compiler or
397 with an ABI is needed, because it results in slower code. */
399 #ifndef DEFAULT_PCC_STRUCT_RETURN
400 #define DEFAULT_PCC_STRUCT_RETURN 1
403 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
405 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
407 /* Nonzero for -fforce-mem: load memory value into a register
408 before arithmetic on it. This makes better cse but slower compilation. */
410 int flag_force_mem = 0;
412 /* Nonzero for -fforce-addr: load memory address into a register before
413 reference to memory. This makes better cse but slower compilation. */
415 int flag_force_addr = 0;
417 /* Nonzero for -fdefer-pop: don't pop args after each function call;
418 instead save them up to pop many calls' args with one insns. */
420 int flag_defer_pop = 0;
422 /* Nonzero for -ffloat-store: don't allocate floats and doubles
423 in extended-precision registers. */
425 int flag_float_store = 0;
427 /* Nonzero for -fcse-follow-jumps:
428 have cse follow jumps to do a more extensive job. */
430 int flag_cse_follow_jumps;
432 /* Nonzero for -fcse-skip-blocks:
433 have cse follow a branch around a block. */
434 int flag_cse_skip_blocks;
436 /* Nonzero for -fexpensive-optimizations:
437 perform miscellaneous relatively-expensive optimizations. */
438 int flag_expensive_optimizations;
440 /* Nonzero for -fthread-jumps:
441 have jump optimize output of loop. */
443 int flag_thread_jumps;
445 /* Nonzero enables strength-reduction in loop.c. */
447 int flag_strength_reduce = 0;
449 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
450 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
451 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
454 int flag_unroll_loops;
456 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
457 This is generally not a win. */
459 int flag_unroll_all_loops;
461 /* Nonzero forces all invariant computations in loops to be moved
464 int flag_move_all_movables = 0;
466 /* Nonzero forces all general induction variables in loops to be
469 int flag_reduce_all_givs = 0;
471 /* Nonzero to perform full register move optimization passes. This is the
474 int flag_regmove = 0;
476 /* Nonzero for -fwritable-strings:
477 store string constants in data segment and don't uniquize them. */
479 int flag_writable_strings = 0;
481 /* Nonzero means don't put addresses of constant functions in registers.
482 Used for compiling the Unix kernel, where strange substitutions are
483 done on the assembly output. */
485 int flag_no_function_cse = 0;
487 /* Nonzero for -fomit-frame-pointer:
488 don't make a frame pointer in simple functions that don't require one. */
490 int flag_omit_frame_pointer = 0;
492 /* Nonzero means place each function into its own section on those platforms
493 which support arbitrary section names and unlimited numbers of sections. */
495 int flag_function_sections = 0;
497 /* ... and similar for data. */
499 int flag_data_sections = 0;
501 /* Nonzero to inhibit use of define_optimization peephole opts. */
503 int flag_no_peephole = 0;
505 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
506 operations in the interest of optimization. For example it allows
507 GCC to assume arguments to sqrt are nonnegative numbers, allowing
508 faster code for sqrt to be generated. */
510 int flag_fast_math = 0;
512 /* Nonzero means the front end generally wants `errno' maintained by math
513 operations, like built-in SQRT, unless overridden by flag_fast_math. */
515 int flag_errno_math = 1;
517 /* 0 means straightforward implementation of complex divide acceptable.
518 1 means wide ranges of inputs must work for complex divide.
519 2 means C9X-like requirements for complex divide (not yet implemented). */
521 int flag_complex_divide_method = 0;
523 /* Nonzero means all references through pointers are volatile. */
527 /* Nonzero means treat all global and extern variables as volatile. */
529 int flag_volatile_global;
531 /* Nonzero means treat all static variables as volatile. */
533 int flag_volatile_static;
535 /* Nonzero means just do syntax checking; don't output anything. */
537 int flag_syntax_only = 0;
539 /* Nonzero means perform global cse. */
541 static int flag_gcse;
543 /* Nonzero means to use global dataflow analysis to eliminate
544 useless null pointer tests. */
546 static int flag_delete_null_pointer_checks;
548 /* Nonzero means to rerun cse after loop optimization. This increases
549 compilation time about 20% and picks up a few more common expressions. */
551 static int flag_rerun_cse_after_loop;
553 /* Nonzero means to run loop optimizations twice. */
555 int flag_rerun_loop_opt;
557 /* Nonzero for -finline-functions: ok to inline functions that look like
558 good inline candidates. */
560 int flag_inline_functions;
562 /* Nonzero for -fkeep-inline-functions: even if we make a function
563 go inline everywhere, keep its definition around for debugging
566 int flag_keep_inline_functions;
568 /* Nonzero means that functions will not be inlined. */
572 /* Nonzero means that we should emit static const variables
573 regardless of whether or not optimization is turned on. */
575 int flag_keep_static_consts = 1;
577 /* Nonzero means we should be saving declaration info into a .X file. */
579 int flag_gen_aux_info = 0;
581 /* Specified name of aux-info file. */
583 static char *aux_info_file_name;
585 /* Nonzero means make the text shared if supported. */
587 int flag_shared_data;
589 /* Nonzero means schedule into delayed branch slots if supported. */
591 int flag_delayed_branch;
593 /* Nonzero if we are compiling pure (sharable) code.
594 Value is 1 if we are doing reasonable (i.e. simple
595 offset into offset table) pic. Value is 2 if we can
596 only perform register offsets. */
600 /* Nonzero means generate extra code for exception handling and enable
601 exception handling. */
605 /* Nonzero means use the new model for exception handling. Replaces
606 -DNEW_EH_MODEL as a compile option. */
608 int flag_new_exceptions = 1;
610 /* Nonzero means generate frame unwind info table when supported */
612 int flag_unwind_tables = 0;
614 /* Nonzero means don't place uninitialized global data in common storage
619 /* Nonzero means pretend it is OK to examine bits of target floats,
620 even if that isn't true. The resulting code will have incorrect constants,
621 but the same series of instructions that the native compiler would make. */
623 int flag_pretend_float;
625 /* Nonzero means change certain warnings into errors.
626 Usually these are warnings about failure to conform to some standard. */
628 int flag_pedantic_errors = 0;
630 /* flag_schedule_insns means schedule insns within basic blocks (before
632 flag_schedule_insns_after_reload means schedule insns after
635 int flag_schedule_insns = 0;
636 int flag_schedule_insns_after_reload = 0;
638 /* The following flags have effect only for scheduling before register
641 flag_schedule_interblock means schedule insns accross basic blocks.
642 flag_schedule_speculative means allow speculative motion of non-load insns.
643 flag_schedule_speculative_load means allow speculative motion of some
645 flag_schedule_speculative_load_dangerous allows speculative motion of more
648 int flag_schedule_interblock = 1;
649 int flag_schedule_speculative = 1;
650 int flag_schedule_speculative_load = 0;
651 int flag_schedule_speculative_load_dangerous = 0;
653 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
654 by a cheaper branch, on a count register. */
655 int flag_branch_on_count_reg;
657 /* -finhibit-size-directive inhibits output of .size for ELF.
658 This is used only for compiling crtstuff.c,
659 and it may be extended to other effects
660 needed for crtstuff.c on other systems. */
661 int flag_inhibit_size_directive = 0;
663 /* -fverbose-asm causes extra commentary information to be produced in
664 the generated assembly code (to make it more readable). This option
665 is generally only of use to those who actually need to read the
666 generated assembly code (perhaps while debugging the compiler itself).
667 -fno-verbose-asm, the default, causes the extra information
668 to be omitted and is useful when comparing two assembler files. */
670 int flag_verbose_asm = 0;
672 /* -dA causes debug 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 Currently, this switch is only used by dwarfout.c; however, it is intended
677 to be a catchall for printing debug information in the assembler file. */
679 int flag_debug_asm = 0;
681 /* -fgnu-linker specifies use of the GNU linker for initializations.
682 (Or, more generally, a linker that handles initializations.)
683 -fno-gnu-linker says that collect2 will be used. */
685 int flag_gnu_linker = 0;
687 int flag_gnu_linker = 1;
690 /* Tag all structures with __attribute__(packed) */
691 int flag_pack_struct = 0;
693 /* Emit code to check for stack overflow; also may cause large objects
694 to be allocated dynamically. */
695 int flag_stack_check;
697 /* When non-NULL, indicates that whenever space is allocated on the
698 stack, the resulting stack pointer must not pass this
699 address---that is, for stacks that grow downward, the stack pointer
700 must always be greater than or equal to this address; for stacks
701 that grow upward, the stack pointer must be less than this address.
702 At present, the rtx may be either a REG or a SYMBOL_REF, although
703 the support provided depends on the backend. */
706 /* -fcheck-memory-usage causes extra code to be generated in order to check
707 memory accesses. This is used by a detector of bad memory accesses such
709 int flag_check_memory_usage = 0;
711 /* -fprefix-function-name causes function name to be prefixed. This
712 can be used with -fcheck-memory-usage to isolate code compiled with
713 -fcheck-memory-usage. */
714 int flag_prefix_function_name = 0;
716 /* 0 if pointer arguments may alias each other. True in C.
717 1 if pointer arguments may not alias each other but may alias
719 2 if pointer arguments may not alias each other and may not
720 alias global variables. True in Fortran.
721 This defaults to 0 for C. */
722 int flag_argument_noalias = 0;
724 /* Nonzero if we should do (language-dependent) alias analysis.
725 Typically, this analysis will assume that expressions of certain
726 types do not alias expressions of certain other types. Only used
727 if alias analysis (in general) is enabled. */
728 int flag_strict_aliasing = 0;
730 /* Instrument functions with calls at entry and exit, for profiling. */
731 int flag_instrument_function_entry_exit = 0;
733 /* Nonzero means ignore `#ident' directives. 0 means handle them.
734 On SVR4 targets, it also controls whether or not to emit a
735 string identifying the compiler. */
737 int flag_no_ident = 0;
739 /* This will perform a peephole pass before sched2. */
740 int flag_peephole2 = 0;
742 /* -fbounded-pointers causes gcc to compile pointers as composite
743 objects occupying three words: the pointer value, the base address
744 of the referent object, and the address immediately beyond the end
745 of the referent object. The base and extent allow us to perform
746 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
747 int flag_bounded_pointers = 0;
749 /* -fcheck-bounds causes gcc to generate array bounds checks.
750 For C, C++: defaults to value of flag_bounded_pointers.
751 For ObjC: defaults to off.
752 For Java: defaults to on.
753 For Fortran: defaults to off.
754 For CHILL: defaults to off. */
755 int flag_bounds_check = 0;
757 /* If one, renumber instruction UIDs to reduce the number of
758 unused UIDs if there are a lot of instructions. If greater than
759 one, unconditionally renumber instruction UIDs. */
760 int flag_renumber_insns = 1;
762 /* Values of the -falign-* flags: how much to align labels in code.
763 0 means `use default', 1 means `don't align'.
764 For each variable, there is an _log variant which is the power
765 of two not less than the variable, for .align output. */
772 int align_labels_log;
774 int align_functions_log;
776 /* Table of supported debugging formats. */
780 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
781 constant expression, we use NO_DEBUG in its place. */
782 enum debug_info_type debug_type;
783 int use_extensions_p;
784 const char * description;
788 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
789 "Generate default debug format output" },
790 { "gdb", NO_DEBUG, 1, "Generate default extended debug format output" },
791 #ifdef DBX_DEBUGGING_INFO
792 { "stabs", DBX_DEBUG, 0, "Generate STABS format debug output" },
793 { "stabs+", DBX_DEBUG, 1, "Generate extended STABS format debug output" },
795 #ifdef DWARF_DEBUGGING_INFO
796 { "dwarf", DWARF_DEBUG, 0, "Generate DWARF-1 format debug output"},
797 { "dwarf+", DWARF_DEBUG, 1,
798 "Generated extended DWARF-1 format debug output" },
800 #ifdef DWARF2_DEBUGGING_INFO
801 { "dwarf-2", DWARF2_DEBUG, 0, "Enable DWARF-2 debug output" },
803 #ifdef XCOFF_DEBUGGING_INFO
804 { "xcoff", XCOFF_DEBUG, 0, "Generate XCOFF format debug output" },
805 { "xcoff+", XCOFF_DEBUG, 1, "Generate extended XCOFF format debug output" },
807 #ifdef SDB_DEBUGGING_INFO
808 { "coff", SDB_DEBUG, 0, "Generate COFF format debug output" },
818 const char * description;
820 lang_independent_options;
822 /* Add or remove a leading underscore from user symbols. */
823 int flag_leading_underscore = -1;
825 /* The user symbol prefix after having resolved same. */
826 const char *user_label_prefix;
828 /* A default for same. */
829 #ifndef USER_LABEL_PREFIX
830 #define USER_LABEL_PREFIX ""
833 /* Table of language-independent -f options.
834 STRING is the option name. VARIABLE is the address of the variable.
835 ON_VALUE is the value to store in VARIABLE
836 if `-fSTRING' is seen as an option.
837 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
839 lang_independent_options f_options[] =
841 {"float-store", &flag_float_store, 1,
842 "Do not store floats in registers" },
843 {"volatile", &flag_volatile, 1,
844 "Consider all mem refs through pointers as volatile"},
845 {"volatile-global", &flag_volatile_global, 1,
846 "Consider all mem refs to global data to be volatile" },
847 {"volatile-static", &flag_volatile_static, 1,
848 "Consider all mem refs to static data to be volatile" },
849 {"defer-pop", &flag_defer_pop, 1,
850 "Defer popping functions args from stack until later" },
851 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
852 "When possible do not generate stack frames"},
853 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
854 "When running CSE, follow jumps to their targets" },
855 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
856 "When running CSE, follow conditional jumps" },
857 {"expensive-optimizations", &flag_expensive_optimizations, 1,
858 "Perform a number of minor, expensive optimisations" },
859 {"thread-jumps", &flag_thread_jumps, 1,
860 "Perform jump threading optimisations"},
861 {"strength-reduce", &flag_strength_reduce, 1,
862 "Perform strength reduction optimisations" },
863 {"unroll-loops", &flag_unroll_loops, 1,
864 "Perform loop unrolling when iteration count is known" },
865 {"unroll-all-loops", &flag_unroll_all_loops, 1,
866 "Perform loop unrolling for all loops" },
867 {"move-all-movables", &flag_move_all_movables, 1,
868 "Force all loop invariant computations out of loops" },
869 {"reduce-all-givs", &flag_reduce_all_givs, 1,
870 "Strength reduce all loop general induction variables" },
871 {"writable-strings", &flag_writable_strings, 1,
872 "Store strings in writable data section" },
873 {"peephole", &flag_no_peephole, 0,
874 "Enable machine specific peephole optimisations" },
875 {"force-mem", &flag_force_mem, 1,
876 "Copy memory operands into registers before using" },
877 {"force-addr", &flag_force_addr, 1,
878 "Copy memory address constants into regs before using" },
879 {"function-cse", &flag_no_function_cse, 0,
880 "Allow function addresses to be held in registers" },
881 {"inline-functions", &flag_inline_functions, 1,
882 "Integrate simple functions into their callers" },
883 {"keep-inline-functions", &flag_keep_inline_functions, 1,
884 "Generate code for funcs even if they are fully inlined" },
885 {"inline", &flag_no_inline, 0,
886 "Pay attention to the 'inline' keyword"},
887 {"keep-static-consts", &flag_keep_static_consts, 1,
888 "Emit static const variables even if they are not used" },
889 {"syntax-only", &flag_syntax_only, 1,
890 "Check for syntax errors, then stop" },
891 {"shared-data", &flag_shared_data, 1,
892 "Mark data as shared rather than private" },
893 {"caller-saves", &flag_caller_saves, 1,
894 "Enable saving registers around function calls" },
895 {"pcc-struct-return", &flag_pcc_struct_return, 1,
896 "Return 'short' aggregates in memory, not registers" },
897 {"reg-struct-return", &flag_pcc_struct_return, 0,
898 "Return 'short' aggregates in registers" },
899 {"delayed-branch", &flag_delayed_branch, 1,
900 "Attempt to fill delay slots of branch instructions" },
901 {"gcse", &flag_gcse, 1,
902 "Perform the global common subexpression elimination" },
903 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
904 "Run CSE pass after loop optimisations"},
905 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
906 "Run the loop optimiser twice"},
907 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
908 "Delete useless null pointer checks" },
909 {"pretend-float", &flag_pretend_float, 1,
910 "Pretend that host and target use the same FP format"},
911 {"schedule-insns", &flag_schedule_insns, 1,
912 "Reschedule instructions to avoid pipeline stalls"},
913 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
914 "Run two passes of the instruction scheduler"},
915 {"sched-interblock",&flag_schedule_interblock, 1,
916 "Enable scheduling across basic blocks" },
917 {"sched-spec",&flag_schedule_speculative, 1,
918 "Allow speculative motion of non-loads" },
919 {"sched-spec-load",&flag_schedule_speculative_load, 1,
920 "Allow speculative motion of some loads" },
921 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
922 "Allow speculative motion of more loads" },
923 {"branch-count-reg",&flag_branch_on_count_reg, 1,
924 "Replace add,compare,branch with branch on count reg"},
925 {"pic", &flag_pic, 1,
926 "Generate position independent code, if possible"},
927 {"PIC", &flag_pic, 2, ""},
928 {"exceptions", &flag_exceptions, 1,
929 "Enable exception handling" },
930 {"new-exceptions", &flag_new_exceptions, 1,
931 "Use the new model for exception handling" },
932 {"unwind-tables", &flag_unwind_tables, 1,
933 "Just generate unwind tables for exception handling" },
934 {"sjlj-exceptions", &exceptions_via_longjmp, 1,
935 "Use setjmp/longjmp to handle exceptions" },
936 {"asynchronous-exceptions", &asynchronous_exceptions, 1,
937 "Support asynchronous exceptions" },
938 {"profile-arcs", &profile_arc_flag, 1,
939 "Insert arc based program profiling code" },
940 {"test-coverage", &flag_test_coverage, 1,
941 "Create data files needed by gcov" },
942 {"branch-probabilities", &flag_branch_probabilities, 1,
943 "Use profiling information for branch probabilities" },
944 {"reorder-blocks", &flag_reorder_blocks, 1,
945 "Reorder basic blocks to improve code placement" },
946 {"fast-math", &flag_fast_math, 1,
947 "Improve FP speed by violating ANSI & IEEE rules" },
948 {"common", &flag_no_common, 0,
949 "Do not put unitialised globals in the common section" },
950 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
951 "Do not generate .size directives" },
952 {"function-sections", &flag_function_sections, 1,
953 "place each function into its own section" },
954 {"data-sections", &flag_data_sections, 1,
955 "place data items into their own section" },
956 {"verbose-asm", &flag_verbose_asm, 1,
957 "Add extra commentry to assembler output"},
958 {"gnu-linker", &flag_gnu_linker, 1,
959 "Output GNU ld formatted global initialisers"},
960 {"regmove", &flag_regmove, 1,
961 "Enables a register move optimisation"},
962 {"optimize-register-move", &flag_regmove, 1,
963 "Do the full regmove optimization pass"},
964 {"pack-struct", &flag_pack_struct, 1,
965 "Pack structure members together without holes" },
966 {"stack-check", &flag_stack_check, 1,
967 "Insert stack checking code into the program" },
968 {"argument-alias", &flag_argument_noalias, 0,
969 "Specify that arguments may alias each other & globals"},
970 {"argument-noalias", &flag_argument_noalias, 1,
971 "Assume arguments may alias globals but not each other"},
972 {"argument-noalias-global", &flag_argument_noalias, 2,
973 "Assume arguments do not alias each other or globals" },
974 {"strict-aliasing", &flag_strict_aliasing, 1,
975 "Assume strict aliasing rules apply" },
976 {"align-loops", &align_loops, 0,
977 "Align the start of loops" },
978 {"align-jumps", &align_jumps, 0,
979 "Align labels which are only reached by jumping" },
980 {"align-labels", &align_labels, 0,
981 "Align all labels" },
982 {"align-functions", &align_functions, 0,
983 "Align the start of functions" },
984 {"check-memory-usage", &flag_check_memory_usage, 1,
985 "Generate code to check every memory access" },
986 {"prefix-function-name", &flag_prefix_function_name, 1,
987 "Add a prefix to all function names" },
988 {"dump-unnumbered", &flag_dump_unnumbered, 1,
989 "Suppress output of instruction numbers and line number notes in debugging dumps"},
990 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
991 "Instrument function entry/exit with profiling calls"},
992 {"leading-underscore", &flag_leading_underscore, 1,
993 "External symbols have a leading underscore" },
994 {"ident", &flag_no_ident, 0,
995 "Process #ident directives"},
996 { "peephole2", &flag_peephole2, 1,
997 "Enables an rtl peephole pass run before sched2" },
998 {"math-errno", &flag_errno_math, 1,
999 "Set errno after built-in math functions"},
1000 {"bounded-pointers", &flag_bounded_pointers, 1,
1001 "Compile pointers as triples: value, base & end" },
1002 {"bounds-check", &flag_bounds_check, 1,
1003 "Generate code to check bounds before dereferencing pointers and arrays" }
1006 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1008 /* Table of language-specific options. */
1010 static struct lang_opt
1012 const char * option;
1013 const char * description;
1015 documented_lang_options[] =
1017 /* In order not to overload the --help output, the convention
1018 used here is to only describe those options which are not
1019 enabled by default. */
1021 { "-ansi", "Compile just for ANSI C" },
1022 { "-fallow-single-precision",
1023 "Do not promote floats to double if using -traditional" },
1024 { "-std= ", "Determine language standard"},
1026 { "-fsigned-bitfields", "" },
1027 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1028 { "-fno-signed-bitfields", "" },
1029 { "-fno-unsigned-bitfields","" },
1030 { "-fsigned-char", "Make 'char' be signed by default"},
1031 { "-funsigned-char", "Make 'char' be unsigned by default"},
1032 { "-fno-signed-char", "" },
1033 { "-fno-unsigned-char", "" },
1035 { "-ftraditional", "" },
1036 { "-traditional", "Attempt to support traditional K&R style C"},
1037 { "-fnotraditional", "" },
1038 { "-fno-traditional", "" },
1041 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1042 { "-fbuiltin", "" },
1043 { "-fno-builtin", "Do not recognise any built in functions" },
1044 { "-fhosted", "Assume normal C execution environment" },
1045 { "-fno-hosted", "" },
1047 "Assume that standard libraries & main might not exist" },
1048 { "-fno-freestanding", "" },
1049 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1050 { "-fno-cond-mismatch", "" },
1051 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1052 { "-fno-dollars-in-identifiers", "" },
1053 { "-fpreprocessed", "" },
1054 { "-fno-preprocessed", "" },
1055 { "-fshort-double", "Use the same size for double as for float" },
1056 { "-fno-short-double", "" },
1057 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1058 { "-fno-short-enums", "" },
1059 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1060 { "-fno-short-wchar", "" },
1062 { "-Wall", "Enable most warning messages" },
1063 { "-Wbad-function-cast",
1064 "Warn about casting functions to incompatible types" },
1065 { "-Wno-bad-function-cast", "" },
1066 { "-Wmissing-noreturn",
1067 "Warn about functions which might be candidates for attribute noreturn" },
1068 { "-Wno-missing-noreturn", "" },
1069 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1070 { "-Wno-cast-qual", "" },
1071 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1072 { "-Wno-char-subscripts", "" },
1073 { "-Wcomment", "Warn if nested comments are detected" },
1074 { "-Wno-comment", "" },
1075 { "-Wcomments", "Warn if nested comments are detected" },
1076 { "-Wno-comments", "" },
1077 { "-Wconversion", "Warn about possibly confusing type conversions" },
1078 { "-Wno-conversion", "" },
1079 { "-Wformat", "Warn about printf format anomalies" },
1080 { "-Wno-format", "" },
1081 { "-Wimplicit-function-declaration",
1082 "Warn about implicit function declarations" },
1083 { "-Wno-implicit-function-declaration", "" },
1084 { "-Werror-implicit-function-declaration", "" },
1085 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1086 { "-Wno-implicit-int", "" },
1087 { "-Wimplicit", "" },
1088 { "-Wno-implicit", "" },
1089 { "-Wimport", "Warn about the use of the #import directive" },
1090 { "-Wno-import", "" },
1091 { "-Wlong-long","" },
1092 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1093 { "-Wmain", "Warn about suspicious declarations of main" },
1094 { "-Wno-main", "" },
1095 { "-Wmissing-braces",
1096 "Warn about possibly missing braces around initialisers" },
1097 { "-Wno-missing-braces", "" },
1098 { "-Wmissing-declarations",
1099 "Warn about global funcs without previous declarations"},
1100 { "-Wno-missing-declarations", "" },
1101 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1102 { "-Wno-missing-prototypes", "" },
1103 { "-Wmultichar", "Warn about use of multicharacter literals"},
1104 { "-Wno-multichar", "" },
1105 { "-Wnested-externs", "Warn about externs not at file scope level" },
1106 { "-Wno-nested-externs", "" },
1107 { "-Wparentheses", "Warn about possible missing parentheses" },
1108 { "-Wno-parentheses", "" },
1109 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1110 { "-Wno-pointer-arith", "" },
1111 { "-Wredundant-decls",
1112 "Warn about multiple declarations of the same object" },
1113 { "-Wno-redundant-decls", "" },
1114 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1115 { "-Wno-sign-compare", "" },
1116 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1117 { "-Wno-float-equal", "" },
1118 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1119 { "-Wno-unknown-pragmas", "" },
1120 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1121 { "-Wno-strict-prototypes", "" },
1122 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1123 { "-Wno-traditional", "" },
1124 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1125 { "-Wno-trigraphs", "" },
1127 { "-Wno-undef", "" },
1128 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1129 { "-Wno-write-strings", "" },
1131 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1133 /* These are for Objective C. */
1134 DEFINE_LANG_NAME ("Objective C")
1136 { "-lang-objc", "" },
1137 { "-gen-decls", "Dump decls to a .decl file" },
1138 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1139 { "-fno-gnu-runtime", "" },
1140 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1141 { "-fno-next-runtime", "" },
1142 { "-Wselector", "Warn if a selector has multiple methods" },
1143 { "-Wno-selector", "" },
1144 { "-Wprotocol", "" },
1145 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1146 { "-print-objc-runtime-info",
1147 "Generate C header of platform specific features" },
1149 #include "options.h"
1153 /* Here is a table, controlled by the tm.h file, listing each -m switch
1154 and which bits in `target_switches' it should set or clear.
1155 If VALUE is positive, it is bits to set.
1156 If VALUE is negative, -VALUE is bits to clear.
1157 (The sign bit is not used so there is no confusion.) */
1163 const char * description;
1165 target_switches [] = TARGET_SWITCHES;
1167 /* This table is similar, but allows the switch to have a value. */
1169 #ifdef TARGET_OPTIONS
1172 const char * prefix;
1173 const char ** variable;
1174 const char * description;
1176 target_options [] = TARGET_OPTIONS;
1179 /* Options controlling warnings */
1181 /* Don't print warning messages. -w. */
1183 int inhibit_warnings = 0;
1185 /* Print various extra warnings. -W. */
1187 int extra_warnings = 0;
1189 /* Treat warnings as errors. -Werror. */
1191 int warnings_are_errors = 0;
1193 /* Nonzero to warn about unused local variables. */
1197 /* Nonzero to warn about code which is never reached. */
1199 int warn_notreached;
1201 /* Nonzero to warn about variables used before they are initialized. */
1203 int warn_uninitialized;
1205 /* Nonzero means warn about all declarations which shadow others. */
1209 /* Warn if a switch on an enum fails to have a case for every enum value. */
1213 /* Nonzero means warn about function definitions that default the return type
1214 or that use a null return and have a return-type other than void. */
1216 int warn_return_type;
1218 /* Nonzero means warn about pointer casts that increase the required
1219 alignment of the target type (and might therefore lead to a crash
1220 due to a misaligned access). */
1222 int warn_cast_align;
1224 /* Nonzero means warn about any identifiers that match in the first N
1225 characters. The value N is in `id_clash_len'. */
1230 /* Nonzero means warn about any objects definitions whose size is larger
1231 than N bytes. Also want about function definitions whose returned
1232 values are larger than N bytes. The value N is in `larger_than_size'. */
1234 int warn_larger_than;
1235 HOST_WIDE_INT larger_than_size;
1237 /* Nonzero means warn if inline function is too large. */
1241 /* Warn if a function returns an aggregate,
1242 since there are often incompatible calling conventions for doing this. */
1244 int warn_aggregate_return;
1246 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1250 /* Warn when gcc pads a structure to an alignment boundary. */
1254 /* Likewise for -W. */
1256 lang_independent_options W_options[] =
1258 {"unused", &warn_unused, 1, "Warn when a variable is unused" },
1259 {"error", &warnings_are_errors, 1, ""},
1260 {"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
1261 {"switch", &warn_switch, 1,
1262 "Warn about enumerated switches missing a specific case" },
1263 {"aggregate-return", &warn_aggregate_return, 1,
1264 "Warn about returning structures, unions or arrays" },
1265 {"cast-align", &warn_cast_align, 1,
1266 "Warn about pointer casts which increase alignment" },
1267 {"unreachable-code", &warn_notreached, 1,
1268 "Warn about code that will never be executed" },
1269 {"uninitialized", &warn_uninitialized, 1,
1270 "Warn about unitialized automatic variables"},
1271 {"inline", &warn_inline, 1,
1272 "Warn when an inlined function cannot be inlined"},
1273 {"packed", &warn_packed, 1,
1274 "Warn when the packed attribute has no effect on struct layout"},
1275 {"padded", &warn_padded, 1,
1276 "Warn when padding is required to align struct members"}
1279 /* Output files for assembler code (real compiler output)
1280 and debugging dumps. */
1283 FILE *aux_info_file;
1284 FILE *rtl_dump_file = NULL;
1286 /* Decode the string P as an integral parameter.
1287 If the string is indeed an integer return its numeric value else
1288 issue an Invalid Option error for the option PNAME and return DEFVAL.
1289 If PNAME is zero just return DEFVAL, do not call error. */
1292 read_integral_parameter (p, pname, defval)
1297 const char *endp = p;
1301 if (*endp >= '0' && *endp <= '9')
1310 error ("Invalid option `%s'", pname);
1318 /* Time accumulators, to count the total time spent in various passes. */
1322 int integration_time;
1328 int branch_prob_time;
1333 int local_alloc_time;
1334 int global_alloc_time;
1339 int reorder_blocks_time;
1340 int shorten_branch_time;
1348 /* Return time used so far, in microseconds. */
1358 #else /* not BeOS */
1359 #if defined (_WIN32) && !defined (__CYGWIN__)
1363 return (clock() * 1000);
1364 #else /* not _WIN32 */
1370 tick = 1000000 / sysconf(_SC_CLK_TCK);
1372 return (tms.tms_utime + tms.tms_stime) * tick;
1378 # if HAVE_SYSCONF && defined _SC_CLK_TCK
1379 # define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
1382 # define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
1384 # define TICKS_PER_SECOND HZ /* traditional UNIX */
1388 return (tms.tms_utime + tms.tms_stime) * (1000000 / TICKS_PER_SECOND);
1393 struct rusage rusage;
1394 getrusage (0, &rusage);
1395 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
1396 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
1403 int proc_system_time;
1404 int child_user_time;
1405 int child_system_time;
1407 times ((void *) &vms_times);
1408 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
1412 #endif /* _SC_CLK_TCK */
1414 #endif /* __BEOS__ */
1417 #define TIMEVAR(VAR, BODY) \
1418 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
1421 print_time (str, total)
1426 "time in %s: %d.%06d (%.0f%%)\n",
1427 str, total / 1000000, total % 1000000,
1428 all_time == 0 ? 0.00 : (double) total / (double) all_time * 100.0);
1431 /* This is the default decl_printable_name function. */
1434 decl_name (decl, verbosity)
1436 int verbosity ATTRIBUTE_UNUSED;
1438 return IDENTIFIER_POINTER (DECL_NAME (decl));
1441 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1446 struct file_stack *stack = *(struct file_stack **)p;
1448 /* We're only called for input_file_stack, so we can mark the current
1449 input_filename here as well. */
1450 ggc_mark_string (main_input_filename);
1451 ggc_mark_string (input_filename);
1455 ggc_mark_string (stack->name);
1456 stack = stack->next;
1461 /* This calls abort and is used to avoid problems when abort if a macro.
1462 It is used when we need to pass the address of abort. */
1470 /* When `malloc.c' is compiled with `rcheck' defined,
1471 it calls this function to report clobberage. */
1475 const char * s ATTRIBUTE_UNUSED;
1480 /* Return the logarithm of X, base 2, considering X unsigned,
1481 if X is a power of 2. Otherwise, returns -1.
1483 This should be used via the `exact_log2' macro. */
1487 register unsigned HOST_WIDE_INT x;
1489 register int log = 0;
1490 /* Test for 0 or a power of 2. */
1491 if (x == 0 || x != (x & -x))
1493 while ((x >>= 1) != 0)
1498 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1499 If X is 0, return -1.
1501 This should be used via the floor_log2 macro. */
1505 register unsigned HOST_WIDE_INT x;
1507 register int log = -1;
1514 static int float_handler_set;
1516 jmp_buf float_handler;
1518 /* Signals actually come here. */
1521 float_signal (signo)
1522 /* If this is missing, some compilers complain. */
1523 int signo ATTRIBUTE_UNUSED;
1525 if (float_handled == 0)
1527 #if defined (USG) || defined (hpux)
1528 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1531 signal (SIGFPE, float_signal);
1532 longjmp (float_handler, 1);
1535 /* Specify where to longjmp to when a floating arithmetic error happens.
1536 If HANDLER is 0, it means don't handle the errors any more. */
1539 set_float_handler (handler)
1542 float_handled = (handler != 0);
1544 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1546 if (float_handled && ! float_handler_set)
1548 signal (SIGFPE, float_signal);
1549 float_handler_set = 1;
1553 /* This is a wrapper function for code which might elicit an
1554 arithmetic exception. That code should be passed in as a function
1555 pointer FN, and one argument DATA. DATA is usually a struct which
1556 contains the real input and output for function FN. This function
1557 returns 0 (failure) if longjmp was called (i.e. an exception
1558 occured.) It returns 1 (success) otherwise. */
1561 do_float_handler (fn, data)
1562 void (*fn) PARAMS ((PTR));
1569 /* We got here via longjmp() caused by an exception in function fn() */
1570 set_float_handler (NULL);
1574 set_float_handler (buf);
1576 set_float_handler (NULL);
1580 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1581 error happens, pushing the previous specification into OLD_HANDLER.
1582 Return an indication of whether there was a previous handler in effect. */
1585 push_float_handler (handler, old_handler)
1586 jmp_buf handler, old_handler;
1588 int was_handled = float_handled;
1592 memcpy ((char *) old_handler, (char *) float_handler,
1593 sizeof (float_handler));
1595 memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
1599 /* Restore the previous specification of whether and where to longjmp to
1600 when a floating arithmetic error happens. */
1603 pop_float_handler (handled, handler)
1607 float_handled = handled;
1609 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1612 /* Handler for SIGPIPE. */
1616 /* If this is missing, some compilers complain. */
1617 int signo ATTRIBUTE_UNUSED;
1619 fatal ("output pipe has been closed");
1622 /* Strip off a legitimate source ending from the input string NAME of
1623 length LEN. Rather than having to know the names used by all of
1624 our front ends, we strip off an ending of a period followed by
1625 up to five characters. (Java uses ".class".) */
1628 strip_off_ending (name, len)
1633 for (i = 2; i < 6 && len > i; i++)
1635 if (name[len - i] == '.')
1637 name[len - i] = '\0';
1643 /* Output a quoted string. */
1646 output_quoted_string (asm_file, string)
1650 #ifdef OUTPUT_QUOTED_STRING
1651 OUTPUT_QUOTED_STRING (asm_file, string);
1655 putc ('\"', asm_file);
1656 while ((c = *string++) != 0)
1658 if (c == '\"' || c == '\\')
1659 putc ('\\', asm_file);
1662 putc ('\"', asm_file);
1666 /* Output a file name in the form wanted by System V. */
1669 output_file_directive (asm_file, input_name)
1671 const char *input_name;
1673 int len = strlen (input_name);
1674 const char *na = input_name + len;
1676 /* NA gets INPUT_NAME sans directory names. */
1677 while (na > input_name)
1681 #ifdef DIR_SEPARATOR
1682 if (na[-1] == DIR_SEPARATOR)
1688 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1689 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1691 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1692 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1694 fprintf (asm_file, "\t.file\t");
1695 output_quoted_string (asm_file, na);
1696 fputc ('\n', asm_file);
1701 #ifdef ASM_IDENTIFY_LANGUAGE
1702 /* Routine to build language identifier for object file. */
1704 output_lang_identify (asm_out_file)
1707 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1708 char *s = (char *) alloca (len);
1709 sprintf (s, "__gnu_compiled_%s", lang_identify ());
1710 ASM_OUTPUT_LABEL (asm_out_file, s);
1714 /* Routine to open a dump file. */
1716 open_dump_file (suffix, function_name)
1718 const char *function_name;
1725 dumpname = concat (dump_base_name, suffix, NULL);
1727 if (rtl_dump_file != NULL)
1728 fclose (rtl_dump_file);
1730 rtl_dump_file = fopen (dumpname, "a");
1732 if (rtl_dump_file == NULL)
1733 pfatal_with_name (dumpname);
1738 fprintf (rtl_dump_file, "\n;; Function %s\n\n", function_name);
1744 /* Routine to close a dump file. */
1746 close_dump_file (func, insns)
1747 void (*func) PARAMS ((FILE *, rtx));
1754 func (rtl_dump_file, insns);
1756 fflush (rtl_dump_file);
1757 fclose (rtl_dump_file);
1759 rtl_dump_file = NULL;
1765 /* Routine to dump rtl into a file. */
1767 dump_rtl (suffix, decl, func, insns)
1770 void (*func) PARAMS ((FILE *, rtx));
1773 open_dump_file (suffix, decl_printable_name (decl, 2));
1774 close_dump_file (func, insns);
1777 /* Routine to empty a dump file. */
1779 clean_dump_file (suffix)
1782 char * const dumpname = concat (dump_base_name, suffix, NULL);
1784 rtl_dump_file = fopen (dumpname, "w");
1786 if (rtl_dump_file == NULL)
1787 pfatal_with_name (dumpname);
1791 fclose (rtl_dump_file);
1792 rtl_dump_file = NULL;
1797 /* Do any final processing required for the declarations in VEC, of
1798 which there are LEN. We write out inline functions and variables
1799 that have been deferred until this point, but which are required.
1800 Returns non-zero if anything was put out. */
1802 wrapup_global_declarations (vec, len)
1809 int output_something = 0;
1811 for (i = 0; i < len; i++)
1815 /* We're not deferring this any longer. */
1816 DECL_DEFER_OUTPUT (decl) = 0;
1818 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1819 && incomplete_decl_finalize_hook != 0)
1820 (*incomplete_decl_finalize_hook) (decl);
1823 /* Now emit any global variables or functions that we have been
1824 putting off. We need to loop in case one of the things emitted
1825 here references another one which comes earlier in the list. */
1829 for (i = 0; i < len; i++)
1833 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1836 /* Don't write out static consts, unless we still need them.
1838 We also keep static consts if not optimizing (for debugging),
1839 unless the user specified -fno-keep-static-consts.
1840 ??? They might be better written into the debug information.
1841 This is possible when using DWARF.
1843 A language processor that wants static constants to be always
1844 written out (even if it is not used) is responsible for
1845 calling rest_of_decl_compilation itself. E.g. the C front-end
1846 calls rest_of_decl_compilation from finish_decl.
1847 One motivation for this is that is conventional in some
1848 environments to write things like:
1849 static const char rcsid[] = "... version string ...";
1850 intending to force the string to be in the executable.
1852 A language processor that would prefer to have unneeded
1853 static constants "optimized away" would just defer writing
1854 them out until here. E.g. C++ does this, because static
1855 constants are often defined in header files.
1857 ??? A tempting alternative (for both C and C++) would be
1858 to force a constant to be written if and only if it is
1859 defined in a main file, as opposed to an include file. */
1861 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1862 && (! TREE_READONLY (decl)
1863 || TREE_PUBLIC (decl)
1864 || (!optimize && flag_keep_static_consts)
1865 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1868 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1871 if (TREE_CODE (decl) == FUNCTION_DECL
1872 && DECL_INITIAL (decl) != 0
1873 && DECL_SAVED_INSNS (decl) != 0
1874 && (flag_keep_inline_functions
1875 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1876 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1879 temporary_allocation ();
1880 output_inline_function (decl);
1881 permanent_allocation (1);
1886 output_something = 1;
1890 return output_something;
1893 /* Issue appropriate warnings for the global declarations in VEC (of
1894 which there are LEN). Output debugging information for them. */
1896 check_global_declarations (vec, len)
1903 for (i = 0; i < len; i++)
1907 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1908 && ! TREE_ASM_WRITTEN (decl))
1909 /* Cancel the RTL for this decl so that, if debugging info
1910 output for global variables is still to come,
1911 this one will be omitted. */
1912 DECL_RTL (decl) = NULL;
1914 /* Warn about any function
1915 declared static but not defined.
1916 We don't warn about variables,
1917 because many programs have static variables
1918 that exist only to get some text into the object file. */
1919 if (TREE_CODE (decl) == FUNCTION_DECL
1921 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1922 && DECL_INITIAL (decl) == 0
1923 && DECL_EXTERNAL (decl)
1924 && ! DECL_ARTIFICIAL (decl)
1925 && ! TREE_PUBLIC (decl))
1927 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1928 pedwarn_with_decl (decl,
1929 "`%s' used but never defined");
1931 warning_with_decl (decl,
1932 "`%s' declared `static' but never defined");
1933 /* This symbol is effectively an "extern" declaration now. */
1934 TREE_PUBLIC (decl) = 1;
1935 assemble_external (decl);
1938 /* Warn about static fns or vars defined but not used,
1939 but not about inline functions or static consts
1940 since defining those in header files is normal practice. */
1942 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
1943 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
1944 && ! DECL_IN_SYSTEM_HEADER (decl)
1945 && ! DECL_EXTERNAL (decl)
1946 && ! TREE_PUBLIC (decl)
1947 && ! TREE_USED (decl)
1948 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
1949 /* The TREE_USED bit for file-scope decls
1950 is kept in the identifier, to handle multiple
1951 external decls in different scopes. */
1952 && ! TREE_USED (DECL_NAME (decl)))
1953 warning_with_decl (decl, "`%s' defined but not used");
1955 #ifdef SDB_DEBUGGING_INFO
1956 /* The COFF linker can move initialized global vars to the end.
1957 And that can screw up the symbol ordering.
1958 By putting the symbols in that order to begin with,
1959 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1960 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1961 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1962 && ! DECL_EXTERNAL (decl)
1963 && DECL_RTL (decl) != 0)
1964 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
1966 /* Output COFF information for non-global
1967 file-scope initialized variables. */
1968 if (write_symbols == SDB_DEBUG
1969 && TREE_CODE (decl) == VAR_DECL
1970 && DECL_INITIAL (decl)
1971 && ! DECL_EXTERNAL (decl)
1972 && DECL_RTL (decl) != 0
1973 && GET_CODE (DECL_RTL (decl)) == MEM)
1974 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
1975 #endif /* SDB_DEBUGGING_INFO */
1976 #ifdef DWARF_DEBUGGING_INFO
1977 /* Output DWARF information for file-scope tentative data object
1978 declarations, file-scope (extern) function declarations (which
1979 had no corresponding body) and file-scope tagged type declarations
1980 and definitions which have not yet been forced out. */
1982 if (write_symbols == DWARF_DEBUG
1983 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1984 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
1986 #ifdef DWARF2_DEBUGGING_INFO
1987 /* Output DWARF2 information for file-scope tentative data object
1988 declarations, file-scope (extern) function declarations (which
1989 had no corresponding body) and file-scope tagged type declarations
1990 and definitions which have not yet been forced out. */
1992 if (write_symbols == DWARF2_DEBUG
1993 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1994 TIMEVAR (symout_time, dwarf2out_decl (decl));
1999 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2000 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2001 INPUT_FILENAME and LINENO accordingly. */
2004 push_srcloc (file, line)
2008 struct file_stack *fs;
2010 if (input_file_stack)
2012 input_file_stack->name = input_filename;
2013 input_file_stack->line = lineno;
2016 fs = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2017 fs->name = input_filename = file;
2018 fs->line = lineno = line;
2019 fs->indent_level = 0;
2020 fs->next = input_file_stack;
2021 input_file_stack = fs;
2022 input_file_stack_tick++;
2025 /* Pop the top entry off the stack of presently open source files.
2026 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2032 struct file_stack *fs;
2034 fs = input_file_stack;
2035 input_file_stack = fs->next;
2037 input_file_stack_tick++;
2038 /* The initial souce file is never popped. */
2039 if (!input_file_stack)
2041 input_filename = input_file_stack->name;
2042 lineno = input_file_stack->line;
2045 /* Compile an entire file of output from cpp, named NAME.
2046 Write a file of assembly output and various debugging dumps. */
2055 int name_specified = name != 0;
2057 if (dump_base_name == 0)
2058 dump_base_name = name ? name : "gccdump";
2062 integration_time = 0;
2068 branch_prob_time = 0;
2073 local_alloc_time = 0;
2074 global_alloc_time = 0;
2079 reorder_blocks_time = 0;
2080 shorten_branch_time = 0;
2086 /* Initialize data in various passes. */
2090 name = init_parse (name);
2091 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2092 || debug_info_level == DINFO_LEVEL_VERBOSE
2093 || flag_test_coverage
2094 || warn_notreached);
2096 init_decl_processing ();
2103 init_function_once ();
2104 init_stor_layout_once ();
2105 init_varasm_once ();
2107 /* The following initialization functions need to generate rtl, so
2108 provide a dummy function context for them. */
2109 init_dummy_function_start ();
2112 if (flag_caller_saves)
2113 init_caller_save ();
2114 expand_dummy_function_end ();
2116 /* If auxiliary info generation is desired, open the output file.
2117 This goes in the same directory as the source file--unlike
2118 all the other output files. */
2119 if (flag_gen_aux_info)
2121 aux_info_file = fopen (aux_info_file_name, "w");
2122 if (aux_info_file == 0)
2123 pfatal_with_name (aux_info_file_name);
2126 /* Clear the dump files. */
2128 clean_dump_file (".00.rtl");
2131 clean_dump_file (".01.jump");
2132 if (graph_dump_format != no_graph)
2133 clean_graph_dump_file (dump_base_name, ".01.jump");
2137 clean_dump_file (".02.cse");
2138 if (graph_dump_format != no_graph)
2139 clean_graph_dump_file (dump_base_name, ".02.cse");
2143 clean_dump_file (".03.addressof");
2144 if (graph_dump_format != no_graph)
2145 clean_graph_dump_file (dump_base_name, ".03.addressof");
2149 clean_dump_file (".04.gcse");
2150 if (graph_dump_format != no_graph)
2151 clean_graph_dump_file (dump_base_name, ".04.gcse");
2155 clean_dump_file (".05.loop");
2156 if (graph_dump_format != no_graph)
2157 clean_graph_dump_file (dump_base_name, ".05.loop");
2161 clean_dump_file (".06.cse2");
2162 if (graph_dump_format != no_graph)
2163 clean_graph_dump_file (dump_base_name, ".06.cse2");
2165 if (branch_prob_dump)
2167 clean_dump_file (".07.bp");
2168 if (graph_dump_format != no_graph)
2169 clean_graph_dump_file (dump_base_name, ".07.bp");
2173 clean_dump_file (".08.flow");
2174 if (graph_dump_format != no_graph)
2175 clean_graph_dump_file (dump_base_name, ".08.flow");
2179 clean_dump_file (".09.combine");
2180 if (graph_dump_format != no_graph)
2181 clean_graph_dump_file (dump_base_name, ".09.combine");
2185 clean_dump_file (".10.regmove");
2186 if (graph_dump_format != no_graph)
2187 clean_graph_dump_file (dump_base_name, ".10.regmove");
2189 #ifdef INSN_SCHEDULING
2192 clean_dump_file (".11.sched");
2193 if (graph_dump_format != no_graph)
2194 clean_graph_dump_file (dump_base_name, ".11.sched");
2199 clean_dump_file (".12.lreg");
2200 if (graph_dump_format != no_graph)
2201 clean_graph_dump_file (dump_base_name, ".12.lreg");
2203 if (global_reg_dump)
2205 clean_dump_file (".13.greg");
2206 if (graph_dump_format != no_graph)
2207 clean_graph_dump_file (dump_base_name, ".13.greg");
2211 clean_dump_file (".14.flow2");
2212 if (graph_dump_format != no_graph)
2213 clean_graph_dump_file (dump_base_name, ".14.flow2");
2215 #ifdef HAVE_peephole2
2218 clean_dump_file (".15.peephole2");
2219 if (graph_dump_format != no_graph)
2220 clean_graph_dump_file (dump_base_name, ".15.peephole2");
2223 #ifdef INSN_SCHEDULING
2226 clean_dump_file (".16.sched2");
2227 if (graph_dump_format != no_graph)
2228 clean_graph_dump_file (dump_base_name, ".16.sched2");
2231 if (reorder_blocks_dump)
2233 clean_dump_file (".bbro");
2234 if (graph_dump_format != no_graph)
2235 clean_graph_dump_file (dump_base_name, ".bbro");
2239 clean_dump_file (".17.jump2");
2240 if (graph_dump_format != no_graph)
2241 clean_graph_dump_file (dump_base_name, ".17.jump2");
2243 #ifdef MACHINE_DEPENDENT_REORG
2244 if (mach_dep_reorg_dump)
2246 clean_dump_file (".18.mach");
2247 if (graph_dump_format != no_graph)
2248 clean_graph_dump_file (dump_base_name, ".18.mach");
2254 clean_dump_file (".19.dbr");
2255 if (graph_dump_format != no_graph)
2256 clean_graph_dump_file (dump_base_name, ".19.dbr");
2262 clean_dump_file (".20.stack");
2263 if (graph_dump_format != no_graph)
2264 clean_graph_dump_file (dump_base_name, ".20.stack");
2268 /* Open assembler code output file. */
2270 if (flag_syntax_only)
2271 asm_out_file = NULL;
2274 if (! name_specified && asm_file_name == 0)
2275 asm_out_file = stdout;
2278 if (asm_file_name == 0)
2280 int len = strlen (dump_base_name);
2281 char *dumpname = (char *) xmalloc (len + 6);
2282 memcpy (dumpname, dump_base_name, len + 1);
2283 strip_off_ending (dumpname, len);
2284 strcat (dumpname, ".s");
2285 asm_file_name = dumpname;
2287 if (!strcmp (asm_file_name, "-"))
2288 asm_out_file = stdout;
2290 asm_out_file = fopen (asm_file_name, "w");
2291 if (asm_out_file == 0)
2292 pfatal_with_name (asm_file_name);
2295 #ifdef IO_BUFFER_SIZE
2296 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2297 _IOFBF, IO_BUFFER_SIZE);
2302 name = ggc_alloc_string (name, strlen (name));
2303 input_filename = name;
2305 /* Put an entry on the input file stack for the main input file. */
2306 push_srcloc (input_filename, 0);
2308 /* Perform language-specific initialization.
2309 This may set main_input_filename. */
2312 /* If the input doesn't start with a #line, use the input name
2313 as the official input file name. */
2314 if (main_input_filename == 0)
2315 main_input_filename = name;
2317 if (flag_syntax_only)
2319 write_symbols = NO_DEBUG;
2321 profile_block_flag = 0;
2325 ASM_FILE_START (asm_out_file);
2327 #ifdef ASM_COMMENT_START
2328 if (flag_verbose_asm)
2330 /* Print the list of options in effect. */
2331 print_version (asm_out_file, ASM_COMMENT_START);
2332 print_switch_values (asm_out_file, 0, MAX_LINE,
2333 ASM_COMMENT_START, " ", "\n");
2334 /* Add a blank line here so it appears in assembler output but not
2336 fprintf (asm_out_file, "\n");
2340 /* Output something to inform GDB that this compilation was by GCC. */
2341 #ifndef ASM_IDENTIFY_GCC
2342 fprintf (asm_out_file, "gcc2_compiled.:\n");
2344 ASM_IDENTIFY_GCC (asm_out_file);
2347 /* Output something to identify which front-end produced this file. */
2348 #ifdef ASM_IDENTIFY_LANGUAGE
2349 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2351 } /* ! flag_syntax_only */
2353 #ifndef ASM_OUTPUT_SECTION_NAME
2354 if (flag_function_sections)
2356 warning ("-ffunction-sections not supported for this target.");
2357 flag_function_sections = 0;
2359 if (flag_data_sections)
2361 warning ("-fdata-sections not supported for this target.");
2362 flag_data_sections = 0;
2366 if (flag_function_sections
2367 && (profile_flag || profile_block_flag))
2369 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2370 flag_function_sections = 0;
2373 #ifndef OBJECT_FORMAT_ELF
2374 if (flag_function_sections && write_symbols != NO_DEBUG)
2375 warning ("-ffunction-sections may affect debugging on some targets.");
2378 /* ??? Note: There used to be a conditional here
2379 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2380 This was to guarantee separation between gcc_compiled. and
2381 the first function, for the sake of dbx on Suns.
2382 However, having the extra zero here confused the Emacs
2383 code for unexec, and might confuse other programs too.
2384 Therefore, I took out that change.
2385 In future versions we should find another way to solve
2386 that dbx problem. -- rms, 23 May 93. */
2388 /* Don't let the first function fall at the same address
2389 as gcc_compiled., if profiling. */
2390 if (profile_flag || profile_block_flag)
2392 /* It's best if we can write a nop here since some
2393 assemblers don't tolerate zeros in the text section. */
2394 output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
2397 /* If dbx symbol table desired, initialize writing it
2398 and output the predefined types. */
2399 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2400 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2401 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
2404 #ifdef SDB_DEBUGGING_INFO
2405 if (write_symbols == SDB_DEBUG)
2406 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
2409 #ifdef DWARF_DEBUGGING_INFO
2410 if (write_symbols == DWARF_DEBUG)
2411 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
2413 #ifdef DWARF2_UNWIND_INFO
2414 if (dwarf2out_do_frame ())
2415 dwarf2out_frame_init ();
2417 #ifdef DWARF2_DEBUGGING_INFO
2418 if (write_symbols == DWARF2_DEBUG)
2419 TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
2422 /* Initialize yet another pass. */
2424 init_final (main_input_filename);
2425 init_branch_prob (dump_base_name);
2427 start_time = get_run_time ();
2429 /* Call the parser, which parses the entire file
2430 (calling rest_of_compilation for each function). */
2432 if (yyparse () != 0)
2434 if (errorcount == 0)
2435 fnotice (stderr, "Errors detected in input file (your bison.simple is out of date)\n");
2437 /* In case there were missing closebraces,
2438 get us back to the global binding level. */
2439 while (! global_bindings_p ())
2443 /* Compilation is now finished except for writing
2444 what's left of the symbol table output. */
2446 parse_time += get_run_time () - start_time;
2448 parse_time -= integration_time;
2449 parse_time -= varconst_time;
2451 if (flag_syntax_only)
2454 globals = getdecls ();
2456 /* Really define vars that have had only a tentative definition.
2457 Really output inline functions that must actually be callable
2458 and have not been output so far. */
2461 int len = list_length (globals);
2462 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2466 /* Process the decls in reverse order--earliest first.
2467 Put them into VEC from back to front, then take out from front. */
2469 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2470 vec[len - i - 1] = decl;
2472 wrapup_global_declarations (vec, len);
2474 /* This must occur after the loop to output deferred functions. Else
2475 the profiler initializer would not be emitted if all the functions
2476 in this compilation unit were deferred.
2478 output_func_start_profiler can not cause any additional functions or
2479 data to need to be output, so it need not be in the deferred function
2481 output_func_start_profiler ();
2483 /* Now that all possible functions have been output, we can dump
2484 the exception table. */
2486 output_exception_table ();
2488 check_global_declarations (vec, len);
2494 /* Write out any pending weak symbol declarations. */
2498 /* Do dbx symbols */
2499 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2500 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2501 TIMEVAR (symout_time,
2503 dbxout_finish (asm_out_file, main_input_filename);
2507 #ifdef DWARF_DEBUGGING_INFO
2508 if (write_symbols == DWARF_DEBUG)
2509 TIMEVAR (symout_time,
2515 #ifdef DWARF2_UNWIND_INFO
2516 if (dwarf2out_do_frame ())
2517 dwarf2out_frame_finish ();
2520 #ifdef DWARF2_DEBUGGING_INFO
2521 if (write_symbols == DWARF2_DEBUG)
2522 TIMEVAR (symout_time,
2524 dwarf2out_finish ();
2528 /* Output some stuff at end of file if nec. */
2530 end_final (dump_base_name);
2532 if (branch_prob_dump)
2533 open_dump_file (".07.bp", NULL);
2535 TIMEVAR (dump_time, end_branch_prob (rtl_dump_file));
2537 if (branch_prob_dump)
2538 close_dump_file (NULL, NULL_RTX);
2541 ASM_FILE_END (asm_out_file);
2545 /* Language-specific end of compilation actions. */
2549 /* Close the dump files. */
2551 if (flag_gen_aux_info)
2553 fclose (aux_info_file);
2555 unlink (aux_info_file_name);
2560 open_dump_file (".09.combine", NULL);
2561 TIMEVAR (dump_time, dump_combine_total_stats (rtl_dump_file));
2562 close_dump_file (NULL, NULL_RTX);
2565 /* Close non-debugging input and output files. Take special care to note
2566 whether fclose returns an error, since the pages might still be on the
2567 buffer chain while the file is open. */
2571 if (! flag_syntax_only
2572 && (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0))
2573 fatal_io_error (asm_file_name);
2575 /* Do whatever is necessary to finish printing the graphs. */
2576 if (graph_dump_format != no_graph)
2579 finish_graph_dump_file (dump_base_name, ".01.jump");
2581 finish_graph_dump_file (dump_base_name, ".02.cse");
2583 finish_graph_dump_file (dump_base_name, ".03.addressof");
2585 finish_graph_dump_file (dump_base_name, ".04.gcse");
2587 finish_graph_dump_file (dump_base_name, ".05.loop");
2589 finish_graph_dump_file (dump_base_name, ".06.cse2");
2590 if (branch_prob_dump)
2591 finish_graph_dump_file (dump_base_name, ".07.bp");
2593 finish_graph_dump_file (dump_base_name, ".08.flow");
2595 finish_graph_dump_file (dump_base_name, ".09.combine");
2597 finish_graph_dump_file (dump_base_name, ".10.regmove");
2598 #ifdef INSN_SCHEDULING
2600 finish_graph_dump_file (dump_base_name, ".11.sched");
2603 finish_graph_dump_file (dump_base_name, ".12.lreg");
2604 if (global_reg_dump)
2605 finish_graph_dump_file (dump_base_name, ".13.greg");
2607 finish_graph_dump_file (dump_base_name, ".14.flow2");
2608 #ifdef HAVE_peephole2
2610 finish_graph_dump_file (dump_base_name, ".15.peephole2");
2612 #ifdef INSN_SCHEDULING
2614 finish_graph_dump_file (dump_base_name, ".16.sched2");
2616 if (reorder_blocks_dump)
2617 finish_graph_dump_file (dump_base_name, ".bbro");
2619 finish_graph_dump_file (dump_base_name, ".17.jump2");
2620 #ifdef MACHINE_DEPENDENT_REORG
2621 if (mach_dep_reorg_dump)
2622 finish_graph_dump_file (dump_base_name, ".18.mach");
2626 finish_graph_dump_file (dump_base_name, ".19.dbr");
2630 finish_graph_dump_file (dump_base_name, ".20.stack");
2634 /* Free up memory for the benefit of leak detectors. */
2637 /* Print the times. */
2641 all_time = get_run_time ();
2643 fprintf (stderr,"\n");
2645 print_time ("parse", parse_time);
2646 print_time ("integration", integration_time);
2647 print_time ("jump", jump_time);
2648 print_time ("cse", cse_time);
2649 print_time ("gcse", gcse_time);
2650 print_time ("loop", loop_time);
2651 print_time ("cse2", cse2_time);
2652 print_time ("branch-prob", branch_prob_time);
2653 print_time ("flow", flow_time);
2654 print_time ("combine", combine_time);
2655 print_time ("regmove", regmove_time);
2656 #ifdef INSN_SCHEDULING
2657 print_time ("sched", sched_time);
2659 print_time ("local-alloc", local_alloc_time);
2660 print_time ("global-alloc", global_alloc_time);
2661 print_time ("flow2", flow2_time);
2662 #ifdef HAVE_peephole2
2663 print_time ("peephole2", peephole2_time);
2665 #ifdef INSN_SCHEDULING
2666 print_time ("sched2", sched2_time);
2669 print_time ("dbranch", dbr_sched_time);
2671 print_time ("bbro", reorder_blocks_time);
2672 print_time ("shorten-branch", shorten_branch_time);
2674 print_time ("stack-reg", stack_reg_time);
2676 print_time ("final", final_time);
2677 print_time ("varconst", varconst_time);
2678 print_time ("symout", symout_time);
2679 print_time ("dump", dump_time);
2681 print_time ("gc", gc_time);
2685 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2686 and TYPE_DECL nodes.
2688 This does nothing for local (non-static) variables, unless the
2689 variable is a register variable with an ASMSPEC. In that case, or
2690 if the variable is not an automatice, it sets up the RTL and
2691 outputs any assembler code (label definition, storage allocation
2692 and initialization).
2694 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2695 the assembler symbol name to be used. TOP_LEVEL is nonzero
2696 if this declaration is not within a function. */
2699 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2701 const char *asmspec;
2705 /* Declarations of variables, and of functions defined elsewhere. */
2707 /* The most obvious approach, to put an #ifndef around where
2708 this macro is used, doesn't work since it's inside a macro call. */
2709 #ifndef ASM_FINISH_DECLARE_OBJECT
2710 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2713 /* Forward declarations for nested functions are not "external",
2714 but we need to treat them as if they were. */
2715 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2716 || TREE_CODE (decl) == FUNCTION_DECL)
2717 TIMEVAR (varconst_time,
2719 make_decl_rtl (decl, asmspec, top_level);
2720 /* Initialized extern variable exists to be replaced
2721 with its value, or represents something that will be
2722 output in another file. */
2723 if (! (TREE_CODE (decl) == VAR_DECL
2724 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2725 && DECL_INITIAL (decl) != 0
2726 && DECL_INITIAL (decl) != error_mark_node))
2727 /* Don't output anything
2728 when a tentative file-scope definition is seen.
2729 But at end of compilation, do output code for them. */
2730 if (! (! at_end && top_level
2731 && (DECL_INITIAL (decl) == 0
2732 || DECL_INITIAL (decl) == error_mark_node)))
2733 assemble_variable (decl, top_level, at_end, 0);
2734 if (decl == last_assemble_variable_decl)
2736 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2740 else if (DECL_REGISTER (decl) && asmspec != 0)
2742 if (decode_reg_name (asmspec) >= 0)
2744 DECL_RTL (decl) = 0;
2745 make_decl_rtl (decl, asmspec, top_level);
2748 error ("invalid register name `%s' for register variable", asmspec);
2750 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2751 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2752 && TREE_CODE (decl) == TYPE_DECL)
2753 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2755 #ifdef SDB_DEBUGGING_INFO
2756 else if (write_symbols == SDB_DEBUG && top_level
2757 && TREE_CODE (decl) == TYPE_DECL)
2758 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2762 /* Called after finishing a record, union or enumeral type. */
2765 rest_of_type_compilation (type, toplev)
2766 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2770 tree type ATTRIBUTE_UNUSED;
2771 int toplev ATTRIBUTE_UNUSED;
2774 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2775 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2776 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2778 #ifdef SDB_DEBUGGING_INFO
2779 if (write_symbols == SDB_DEBUG)
2780 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2784 /* DECL is an inline function, whose body is present, but which is not
2785 being output at this point. (We're putting that off until we need
2786 to do it.) If there are any actions that need to take place,
2787 including the emission of debugging information for the function,
2788 this is where they should go. This function may be called by
2789 language-dependent code for front-ends that do not even generate
2790 RTL for functions that don't need to be put out. */
2793 note_deferral_of_defined_inline_function (decl)
2794 tree decl ATTRIBUTE_UNUSED;
2796 #ifdef DWARF_DEBUGGING_INFO
2797 /* Generate the DWARF info for the "abstract" instance of a function
2798 which we may later generate inlined and/or out-of-line instances
2800 if (write_symbols == DWARF_DEBUG)
2802 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2803 DWARF code expects it to be set in this case. Intuitively,
2804 DECL is the function we just finished defining, so setting
2805 CURRENT_FUNCTION_DECL is sensible. */
2806 tree saved_cfd = current_function_decl;
2807 current_function_decl = decl;
2809 /* Let the DWARF code do its work. */
2810 set_decl_abstract_flags (decl, 1);
2811 dwarfout_file_scope_decl (decl, 0);
2812 set_decl_abstract_flags (decl, 0);
2814 /* Reset CURRENT_FUNCTION_DECL. */
2815 current_function_decl = saved_cfd;
2820 /* This is called from finish_function (within yyparse)
2821 after each top-level definition is parsed.
2822 It is supposed to compile that function or variable
2823 and output the assembler code for it.
2824 After we return, the tree storage is freed. */
2827 rest_of_compilation (decl)
2831 int start_time = get_run_time ();
2834 int rebuild_label_notes_after_reload;
2836 /* When processing delayed functions, prepare_function_start() won't
2837 have been run to re-initialize it. */
2838 cse_not_expected = ! optimize;
2840 /* First, remove any notes we don't need. That will make iterating
2841 over the instruction sequence faster, and allow the garbage
2842 collector to reclaim the memory used by the notes. */
2843 remove_unncessary_notes ();
2845 /* We need to make sure that NOTE_BLOCK is set correctly
2846 for each NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2847 find_loop_tree_blocks ();
2848 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2849 tree in sensible shape. So, we just recalculate it here. */
2850 if (cfun->x_whole_function_mode_p)
2851 unroll_block_trees ();
2853 /* If we are reconsidering an inline function
2854 at the end of compilation, skip the stuff for making it inline. */
2856 if (DECL_SAVED_INSNS (decl) == 0)
2862 /* If this is nested inside an inlined external function, pretend
2863 it was only declared. Since we cannot inline such functions,
2864 generating code for this one is not only not necessary but will
2865 confuse some debugging output writers. */
2866 for (parent = DECL_CONTEXT (current_function_decl);
2867 parent != NULL_TREE;
2868 parent = get_containing_scope (parent))
2869 if (TREE_CODE (parent) == FUNCTION_DECL
2870 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2872 DECL_INITIAL (decl) = 0;
2873 goto exit_rest_of_compilation;
2876 /* If requested, consider whether to make this function inline. */
2877 if (DECL_INLINE (decl) || flag_inline_functions)
2878 TIMEVAR (integration_time,
2880 lose = function_cannot_inline_p (decl);
2881 if (lose || ! optimize)
2883 if (warn_inline && DECL_INLINE (decl))
2884 warning_with_decl (decl, lose);
2885 DECL_ABSTRACT_ORIGIN (decl) = 0;
2886 /* Don't really compile an extern inline function.
2887 If we can't make it inline, pretend
2888 it was only declared. */
2889 if (DECL_EXTERNAL (decl))
2891 DECL_INITIAL (decl) = 0;
2892 goto exit_rest_of_compilation;
2896 /* ??? Note that this has the effect of making it look
2897 like "inline" was specified for a function if we choose
2898 to inline it. This isn't quite right, but it's
2899 probably not worth the trouble to fix. */
2900 inlinable = DECL_INLINE (decl) = 1;
2903 insns = get_insns ();
2905 /* Dump the rtl code if we are dumping rtl. */
2909 open_dump_file (".00.rtl", decl_printable_name (decl, 2));
2911 if (DECL_SAVED_INSNS (decl))
2912 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2914 close_dump_file (print_rtl, insns);
2917 /* If function is inline, and we don't yet know whether to
2918 compile it by itself, defer decision till end of compilation.
2919 finish_compilation will call rest_of_compilation again
2920 for those functions that need to be output. Also defer those
2921 functions that we are supposed to defer. */
2924 DECL_DEFER_OUTPUT (decl) = 1;
2926 if (DECL_DEFER_OUTPUT (decl)
2927 || (DECL_INLINE (decl)
2928 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2929 && ! flag_keep_inline_functions)
2930 || DECL_EXTERNAL (decl))))
2932 DECL_DEFER_OUTPUT (decl) = 1;
2934 /* If -Wreturn-type, we have to do a bit of compilation.
2935 However, if we just fall through we will call
2936 save_for_inline_copying() which results in excessive
2937 memory use. Instead, we just want to call
2938 jump_optimize() to figure out whether or not we can fall
2939 off the end of the function; we do the minimum amount of
2940 work necessary to make that safe. And, we set optimize
2941 to zero to keep jump_optimize from working too hard. */
2942 if (warn_return_type)
2944 int saved_optimize = optimize;
2946 find_exception_handler_labels ();
2947 jump_optimize (get_insns(), !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2948 !JUMP_AFTER_REGSCAN);
2949 optimize = saved_optimize;
2952 note_deferral_of_defined_inline_function (decl);
2953 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2954 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2955 goto exit_rest_of_compilation;
2958 /* If specified extern inline but we aren't inlining it, we are
2959 done. This goes for anything that gets here with DECL_EXTERNAL
2960 set, not just things with DECL_INLINE. */
2961 if (DECL_EXTERNAL (decl))
2962 goto exit_rest_of_compilation;
2965 /* Initialize some variables used by the optimizers. */
2966 init_function_for_compilation ();
2968 if (! DECL_DEFER_OUTPUT (decl))
2969 TREE_ASM_WRITTEN (decl) = 1;
2971 /* Now that integrate will no longer see our rtl, we need not distinguish
2972 between the return value of this function and the return value of called
2974 rtx_equal_function_value_matters = 0;
2976 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2977 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2979 goto exit_rest_of_compilation;
2982 /* Emit code to get eh context, if needed. */
2986 /* If we are doing position-independent code generation, now
2987 is the time to output special prologues and epilogues.
2988 We do not want to do this earlier, because it just clutters
2989 up inline functions with meaningless insns. */
2994 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2995 Note that that may have been done above, in save_for_inline_copying.
2996 The call to resume_temporary_allocation near the end of this function
2997 goes back to the usual state of affairs. This must be done after
2998 we've built up any unwinders for exception handling, and done
2999 the FINALIZE_PIC work, if necessary. */
3001 rtl_in_current_obstack ();
3003 insns = get_insns ();
3005 /* Copy any shared structure that should not be shared. */
3007 unshare_all_rtl (current_function_decl, insns);
3009 init_EXPR_INSN_LIST_cache ();
3011 #ifdef SETJMP_VIA_SAVE_AREA
3012 /* This must be performed before virutal register instantiation. */
3013 if (current_function_calls_alloca)
3014 optimize_save_area_alloca (insns);
3017 /* Instantiate all virtual registers. */
3019 instantiate_virtual_regs (current_function_decl, get_insns ());
3021 /* See if we have allocated stack slots that are not directly addressable.
3022 If so, scan all the insns and create explicit address computation
3023 for all references to such slots. */
3024 /* fixup_stack_slots (); */
3026 /* Find all the EH handlers. */
3027 find_exception_handler_labels ();
3030 open_dump_file (".01.jump", decl_printable_name (decl, 2));
3032 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
3033 are initialized and to compute whether control can drop off the end
3035 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3036 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
3037 JUMP_AFTER_REGSCAN));
3039 /* Jump optimization, and the removal of NULL pointer checks, may
3040 have reduced the number of instructions substantially. CSE, and
3041 future passes, allocate arrays whose dimensions involve the maximum
3042 instruction UID, so if we can reduce the maximum UID we'll save big on
3044 renumber_insns (rtl_dump_file);
3046 /* Dump rtl code after jump, if we are doing that. */
3048 close_dump_file (print_rtl, insns);
3050 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
3051 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
3052 goto exit_rest_of_compilation;
3054 /* Try to identify useless null pointer tests and delete them. */
3055 if (flag_delete_null_pointer_checks)
3056 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3061 /* Perform common subexpression elimination.
3062 Nonzero value from `cse_main' means that jumps were simplified
3063 and some code may now be unreachable, so do
3064 jump optimization again. */
3069 open_dump_file (".02.cse", decl_printable_name (decl, 2));
3071 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
3073 if (flag_thread_jumps)
3074 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
3076 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
3078 /* If we are not running the second CSE pass, then we are no longer
3079 expecting CSE to be run. */
3080 cse_not_expected = !flag_rerun_cse_after_loop;
3082 if (tem || optimize > 1)
3083 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3085 !JUMP_AFTER_REGSCAN));
3087 /* Run this after jump optmizations remove all the unreachable code
3088 so that unreachable code will not keep values live. */
3089 TIMEVAR (cse_time, delete_trivially_dead_insns (insns, max_reg_num ()));
3091 /* Try to identify useless null pointer tests and delete them. */
3092 if (flag_delete_null_pointer_checks)
3093 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3095 /* The second pass of jump optimization is likely to have
3096 removed a bunch more instructions. */
3097 renumber_insns (rtl_dump_file);
3099 /* Dump rtl code after cse, if we are doing that. */
3102 close_dump_file (print_rtl, insns);
3103 if (graph_dump_format != no_graph)
3104 print_rtl_graph_with_bb (dump_base_name, ".02.cse", insns);
3108 purge_addressof (insns);
3109 reg_scan (insns, max_reg_num (), 1);
3113 dump_rtl (".03.addressof", decl, print_rtl, insns);
3114 if (graph_dump_format != no_graph)
3115 print_rtl_graph_with_bb (dump_base_name, ".03.addressof", insns);
3121 /* Perform global cse. */
3123 if (optimize > 0 && flag_gcse)
3126 open_dump_file (".04.gcse", decl_printable_name (decl, 2));
3128 TIMEVAR (gcse_time, tem = gcse_main (insns, rtl_dump_file));
3130 /* If gcse altered any jumps, rerun jump optimizations to clean
3134 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3136 !JUMP_AFTER_REGSCAN));
3141 close_dump_file (print_rtl, insns);
3142 if (graph_dump_format != no_graph)
3143 print_rtl_graph_with_bb (dump_base_name, ".04.gcse", insns);
3149 /* Move constant computations out of loops. */
3154 open_dump_file (".05.loop", decl_printable_name (decl, 2));
3159 if (flag_rerun_loop_opt)
3161 /* We only want to perform unrolling once. */
3163 loop_optimize (insns, rtl_dump_file, 0, 0);
3166 /* The first call to loop_optimize makes some instructions
3167 trivially dead. We delete those instructions now in the
3168 hope that doing so will make the heuristics in loop work
3169 better and possibly speed up compilation. */
3170 delete_trivially_dead_insns (insns, max_reg_num ());
3172 /* The regscan pass is currently necessary as the alias
3173 analysis code depends on this information. */
3174 reg_scan (insns, max_reg_num (), 1);
3176 loop_optimize (insns, rtl_dump_file, flag_unroll_loops, 1);
3179 /* Dump rtl code after loop opt, if we are doing that. */
3183 close_dump_file (print_rtl, insns);
3184 if (graph_dump_format != no_graph)
3185 print_rtl_graph_with_bb (dump_base_name, ".05.loop", insns);
3192 /* ??? Well, nearly. If HAVE_conditional_arithmetic, jump_optimize
3193 has put off all if-conversion until "after CSE". If we put this
3194 off any longer we may miss out doing if-conversion entirely. */
3195 cse_not_expected = 1;
3200 open_dump_file (".06.cse2", decl_printable_name (decl, 2));
3202 if (flag_rerun_cse_after_loop)
3204 /* Running another jump optimization pass before the second
3205 cse pass sometimes simplifies the RTL enough to allow
3206 the second CSE pass to do a better job. Jump_optimize can change
3207 max_reg_num so we must rerun reg_scan afterwards.
3208 ??? Rework to not call reg_scan so often. */
3209 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3210 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3212 JUMP_AFTER_REGSCAN));
3214 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3215 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3218 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3220 !JUMP_AFTER_REGSCAN));
3223 if (flag_thread_jumps)
3225 /* This pass of jump threading straightens out code
3226 that was kinked by loop optimization. */
3227 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3228 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3231 /* Dump rtl code after cse, if we are doing that. */
3234 close_dump_file (print_rtl, insns);
3235 if (graph_dump_format != no_graph)
3236 print_rtl_graph_with_bb (dump_base_name, ".06.cse2", insns);
3243 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3245 if (branch_prob_dump)
3246 open_dump_file (".07.bp", decl_printable_name (decl, 2));
3251 branch_prob (insns, rtl_dump_file);
3254 if (branch_prob_dump)
3256 close_dump_file (print_rtl, insns);
3257 if (graph_dump_format != no_graph)
3258 print_rtl_graph_with_bb (dump_base_name, ".07.bp", insns);
3267 /* Print function header into flow dump now
3268 because doing the flow analysis makes some of the dump. */
3271 open_dump_file (".08.flow", decl_printable_name (decl, 2));
3273 /* Do control and data flow analysis; wrote some of the results to
3279 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3280 cleanup_cfg (insns);
3282 calculate_loop_depth (rtl_dump_file);
3283 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3284 mark_constant_function ();
3287 if (warn_uninitialized || extra_warnings)
3289 uninitialized_vars_warning (DECL_INITIAL (decl));
3291 setjmp_args_warning ();
3294 /* Dump rtl after flow analysis. */
3298 close_dump_file (print_rtl_with_bb, insns);
3299 if (graph_dump_format != no_graph)
3300 print_rtl_graph_with_bb (dump_base_name, ".08.flow", insns);
3306 /* The first life analysis pass has finished. From now on we can not
3307 generate any new pseudos. */
3310 /* If -opt, try combining insns through substitution. */
3314 int rebuild_jump_labels_after_combine = 0;
3316 TIMEVAR (combine_time,
3318 rebuild_jump_labels_after_combine
3319 = combine_instructions (insns, max_reg_num ());
3322 /* Combining insns may have turned an indirect jump into a
3323 direct jump. Rebuid the JUMP_LABEL fields of jumping
3325 if (rebuild_jump_labels_after_combine)
3327 TIMEVAR (jump_time, rebuild_jump_labels (insns));
3330 /* Dump rtl code after insn combination. */
3334 dump_rtl (".09.combine", decl, print_rtl_with_bb, insns);
3335 if (graph_dump_format != no_graph)
3336 print_rtl_graph_with_bb (dump_base_name, ".09.combine", insns);
3343 /* Register allocation pre-pass, to reduce number of moves
3344 necessary for two-address machines. */
3345 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3348 open_dump_file (".10.regmove", decl_printable_name (decl, 2));
3350 TIMEVAR (regmove_time, regmove_optimize (insns, max_reg_num (),
3355 close_dump_file (print_rtl_with_bb, insns);
3356 if (graph_dump_format != no_graph)
3357 print_rtl_graph_with_bb (dump_base_name, ".10.regmove", insns);
3364 if (optimize && n_basic_blocks)
3366 TIMEVAR (gcse_time, optimize_mode_switching (NULL_PTR));
3369 #ifdef INSN_SCHEDULING
3371 /* Print function header into sched dump now
3372 because doing the sched analysis makes some of the dump. */
3373 if (optimize > 0 && flag_schedule_insns)
3376 open_dump_file (".11.sched", decl_printable_name (decl, 2));
3378 /* Do control and data sched analysis,
3379 and write some of the results to dump file. */
3381 TIMEVAR (sched_time, schedule_insns (rtl_dump_file));
3383 /* Dump rtl after instruction scheduling. */
3387 close_dump_file (print_rtl_with_bb, insns);
3388 if (graph_dump_format != no_graph)
3389 print_rtl_graph_with_bb (dump_base_name, ".11.sched", insns);
3397 /* Determine if the current function is a leaf before running reload
3398 since this can impact optimizations done by the prologue and
3399 epilogue thus changing register elimination offsets. */
3400 current_function_is_leaf = leaf_function_p ();
3403 open_dump_file (".12.lreg", decl_printable_name (decl, 2));
3405 /* Allocate pseudo-regs that are used only within 1 basic block.
3407 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3408 jump optimizer after register allocation and reloading are finished. */
3410 TIMEVAR (local_alloc_time,
3412 /* We recomputed reg usage as part of updating the rest
3413 of life info during sched. */
3414 if (! flag_schedule_insns)
3415 recompute_reg_usage (insns, ! optimize_size);
3416 regclass (insns, max_reg_num (), rtl_dump_file);
3417 rebuild_label_notes_after_reload = local_alloc ();
3420 /* Dump rtl code after allocating regs within basic blocks. */
3424 TIMEVAR (dump_time, dump_flow_info (rtl_dump_file));
3425 TIMEVAR (dump_time, dump_local_alloc (rtl_dump_file));
3427 close_dump_file (print_rtl_with_bb, insns);
3428 if (graph_dump_format != no_graph)
3429 print_rtl_graph_with_bb (dump_base_name, ".12.lreg", insns);
3435 if (global_reg_dump)
3436 open_dump_file (".13.greg", decl_printable_name (decl, 2));
3438 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3439 pass fixing up any insns that are invalid. */
3441 TIMEVAR (global_alloc_time,
3444 failure = global_alloc (rtl_dump_file);
3447 build_insn_chain (insns);
3448 failure = reload (insns, 0, rtl_dump_file);
3453 goto exit_rest_of_compilation;
3458 /* Do a very simple CSE pass over just the hard registers. */
3460 reload_cse_regs (insns);
3462 /* If optimizing and we are performing instruction scheduling after
3463 reload, then go ahead and split insns now since we are about to
3464 recompute flow information anyway.
3466 reload_cse_regs may expose more splitting opportunities, expecially
3467 for double-word operations. */
3468 if (optimize > 0 && flag_schedule_insns_after_reload)
3469 split_all_insns (0);
3471 /* Register allocation and reloading may have turned an indirect jump into
3472 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3473 jumping instructions. */
3474 if (rebuild_label_notes_after_reload)
3475 TIMEVAR (jump_time, rebuild_jump_labels (insns));
3477 if (global_reg_dump)
3479 TIMEVAR (dump_time, dump_global_regs (rtl_dump_file));
3480 close_dump_file (print_rtl_with_bb, insns);
3481 if (graph_dump_format != no_graph)
3482 print_rtl_graph_with_bb (dump_base_name, ".13.greg", insns);
3485 /* Re-create the death notes which were deleted during reload. */
3487 open_dump_file (".14.flow2", decl_printable_name (decl, 2));
3489 TIMEVAR (flow2_time,
3491 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3494 /* On some machines, the prologue and epilogue code, or parts thereof,
3495 can be represented as RTL. Doing so lets us schedule insns between
3496 it and the rest of the code and also allows delayed branch
3497 scheduling to operate in the epilogue. */
3498 thread_prologue_and_epilogue_insns (insns);
3505 cleanup_cfg (insns);
3506 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3513 flow2_completed = 1;
3517 close_dump_file (print_rtl_with_bb, insns);
3518 if (graph_dump_format != no_graph)
3519 print_rtl_graph_with_bb (dump_base_name, ".14.flow2", insns);
3522 #ifdef HAVE_peephole2
3523 if (optimize > 0 && flag_peephole2)
3526 open_dump_file (".15.peephole2", decl_printable_name (decl, 2));
3528 TIMEVAR (peephole2_time, peephole2_optimize (rtl_dump_file));
3532 close_dump_file (print_rtl_with_bb, insns);
3533 if (graph_dump_format != no_graph)
3534 print_rtl_graph_with_bb (dump_base_name, ".15.peephole2", insns);
3539 #ifdef INSN_SCHEDULING
3540 if (optimize > 0 && flag_schedule_insns_after_reload)
3543 open_dump_file (".16.sched2", decl_printable_name (decl, 2));
3545 /* Do control and data sched analysis again,
3546 and write some more of the results to dump file. */
3548 TIMEVAR (sched2_time, schedule_insns (rtl_dump_file));
3550 /* Dump rtl after post-reorder instruction scheduling. */
3554 close_dump_file (print_rtl_with_bb, insns);
3555 if (graph_dump_format != no_graph)
3556 print_rtl_graph_with_bb (dump_base_name, ".16.sched2", insns);
3564 #ifdef LEAF_REGISTERS
3565 current_function_uses_only_leaf_regs
3566 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3569 if (optimize > 0 && flag_reorder_blocks)
3571 if (reorder_blocks_dump)
3572 open_dump_file (".bbro", decl_printable_name (decl, 2));
3574 TIMEVAR (reorder_blocks_time, reorder_basic_blocks ());
3576 if (reorder_blocks_dump)
3578 close_dump_file (print_rtl_with_bb, insns);
3579 if (graph_dump_format != no_graph)
3580 print_rtl_graph_with_bb (dump_base_name, ".bbro", insns);
3584 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3585 Also do cross-jumping this time and delete no-op move insns. */
3589 TIMEVAR (jump_time, jump_optimize (insns, JUMP_CROSS_JUMP,
3591 !JUMP_AFTER_REGSCAN));
3593 /* Dump rtl code after jump, if we are doing that. */
3597 dump_rtl (".17.jump2", decl, print_rtl_with_bb, insns);
3598 if (graph_dump_format != no_graph)
3599 print_rtl_graph_with_bb (dump_base_name, ".17.jump2", insns);
3603 /* If a machine dependent reorganization is needed, call it. */
3604 #ifdef MACHINE_DEPENDENT_REORG
3605 if (mach_dep_reorg_dump)
3606 open_dump_file (".18.mach", decl_printable_name (decl, 2));
3608 MACHINE_DEPENDENT_REORG (insns);
3610 if (mach_dep_reorg_dump)
3612 close_dump_file (print_rtl_with_bb, insns);
3613 if (graph_dump_format != no_graph)
3614 print_rtl_graph_with_bb (dump_base_name, ".18.mach", insns);
3621 /* If a scheduling pass for delayed branches is to be done,
3622 call the scheduling code. */
3625 if (optimize > 0 && flag_delayed_branch)
3628 open_dump_file (".19.dbr", decl_printable_name (decl, 2));
3633 dbr_schedule (insns, rtl_dump_file);
3638 close_dump_file (print_rtl_with_bb, insns);
3639 if (graph_dump_format != no_graph)
3640 print_rtl_graph_with_bb (dump_base_name, ".19.dbr", insns);
3648 /* Shorten branches.
3650 Note this must run before reg-stack because of death note (ab)use
3651 in the ia32 backend. */
3652 TIMEVAR (shorten_branch_time,
3654 shorten_branches (get_insns ());
3659 open_dump_file (".20.stack", decl_printable_name (decl, 2));
3661 TIMEVAR (stack_reg_time, reg_to_stack (insns, rtl_dump_file));
3665 close_dump_file (print_rtl_with_bb, insns);
3666 if (graph_dump_format != no_graph)
3667 print_rtl_graph_with_bb (dump_base_name, ".20.stack", insns);
3674 /* Now turn the rtl into assembler code. */
3676 TIMEVAR (final_time,
3681 /* Get the function's name, as described by its RTL.
3682 This may be different from the DECL_NAME name used
3683 in the source file. */
3685 x = DECL_RTL (decl);
3686 if (GET_CODE (x) != MEM)
3689 if (GET_CODE (x) != SYMBOL_REF)
3691 fnname = XSTR (x, 0);
3693 assemble_start_function (decl, fnname);
3694 final_start_function (insns, asm_out_file, optimize);
3695 final (insns, asm_out_file, optimize, 0);
3696 final_end_function (insns, asm_out_file, optimize);
3697 assemble_end_function (decl, fnname);
3699 fflush (asm_out_file);
3701 /* Release all memory allocated by flow. */
3702 free_basic_block_vars (0);
3704 /* Release all memory held by regsets now */
3705 regset_release_memory ();
3711 /* Write DBX symbols if requested */
3713 /* Note that for those inline functions where we don't initially
3714 know for certain that we will be generating an out-of-line copy,
3715 the first invocation of this routine (rest_of_compilation) will
3716 skip over this code by doing a `goto exit_rest_of_compilation;'.
3717 Later on, finish_compilation will call rest_of_compilation again
3718 for those inline functions that need to have out-of-line copies
3719 generated. During that call, we *will* be routed past here. */
3721 #ifdef DBX_DEBUGGING_INFO
3722 if (write_symbols == DBX_DEBUG)
3723 TIMEVAR (symout_time, dbxout_function (decl));
3726 #ifdef DWARF_DEBUGGING_INFO
3727 if (write_symbols == DWARF_DEBUG)
3728 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3731 #ifdef DWARF2_DEBUGGING_INFO
3732 if (write_symbols == DWARF2_DEBUG)
3733 TIMEVAR (symout_time, dwarf2out_decl (decl));
3736 exit_rest_of_compilation:
3738 /* In case the function was not output,
3739 don't leave any temporary anonymous types
3740 queued up for sdb output. */
3741 #ifdef SDB_DEBUGGING_INFO
3742 if (write_symbols == SDB_DEBUG)
3743 sdbout_types (NULL_TREE);
3746 reload_completed = 0;
3747 flow2_completed = 0;
3750 TIMEVAR (final_time,
3752 /* Clear out the insn_length contents now that they are no
3754 init_insn_lengths ();
3756 /* Clear out the real_constant_chain before some of the rtx's
3757 it runs through become garbage. */
3758 clear_const_double_mem ();
3760 /* Cancel the effect of rtl_in_current_obstack. */
3761 resume_temporary_allocation ();
3763 /* Show no temporary slots allocated. */
3766 free_basic_block_vars (0);
3769 /* Make sure volatile mem refs aren't considered valid operands for
3770 arithmetic insns. We must call this here if this is a nested inline
3771 function, since the above code leaves us in the init_recog state
3772 (from final.c), and the function context push/pop code does not
3773 save/restore volatile_ok.
3775 ??? Maybe it isn't necessary for expand_start_function to call this
3776 anymore if we do it here? */
3778 init_recog_no_volatile ();
3780 /* We're done with this function. Free up memory if we can. */
3781 free_after_parsing (cfun);
3782 if (! DECL_DEFER_OUTPUT (decl))
3783 free_after_compilation (cfun);
3789 /* The parsing time is all the time spent in yyparse
3790 *except* what is spent in this function. */
3792 parse_time -= get_run_time () - start_time;
3803 printf ("Usage: %s input [switches]\n", progname);
3804 printf ("Switches:\n");
3806 printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
3807 printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
3808 printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
3809 printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
3811 for (i = NUM_ELEM (f_options); i--;)
3813 const char * description = f_options[i].description;
3815 if (description != NULL && * description != 0)
3816 printf (" -f%-21s %s\n",
3817 f_options[i].string, description);
3820 printf (" -O[number] Set optimisation level to [number]\n");
3821 printf (" -Os Optimise for space rather than speed\n");
3822 printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
3823 printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
3824 printf (" -w Suppress warnings\n");
3825 printf (" -W Enable extra warnings\n");
3827 for (i = NUM_ELEM (W_options); i--;)
3829 const char * description = W_options[i].description;
3831 if (description != NULL && * description != 0)
3832 printf (" -W%-21s %s\n",
3833 W_options[i].string, description);
3836 printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
3837 printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
3838 printf (" -p Enable function profiling\n");
3839 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3840 printf (" -a Enable block profiling \n");
3842 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3843 printf (" -ax Enable jump profiling \n");
3845 printf (" -o <file> Place output into <file> \n");
3846 printf (" -G <number> Put global and static data smaller than <number>\n");
3847 printf (" bytes into a special section (on some targets)\n");
3849 for (i = NUM_ELEM (debug_args); i--;)
3851 if (debug_args[i].description != NULL)
3852 printf (" -g%-21s %s\n", debug_args[i].arg, debug_args[i].description);
3855 printf (" -aux-info <file> Emit declaration info into <file>.X\n");
3856 printf (" -quiet Do not display functions compiled or elapsed time\n");
3857 printf (" -version Display the compiler's version\n");
3858 printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
3859 printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
3860 #if defined INSN_SCHEDULING
3861 printf (" -sched-verbose=<number> Set the verbosity level of the scheduler\n");
3863 printf (" --help Display this information\n");
3868 /* Display descriptions of language specific options.
3869 If there is no description, note that there is an undocumented option.
3870 If the description is empty, do not display anything. (This allows
3871 options to be deliberately undocumented, for whatever reason).
3872 If the option string is missing, then this is a marker, indicating
3873 that the description string is in fact the name of a language, whose
3874 language specific options are to follow. */
3876 if (NUM_ELEM (documented_lang_options) > 1)
3878 printf ("\nLanguage specific options:\n");
3880 for (i = 0; i < NUM_ELEM (documented_lang_options); i++)
3882 const char * description = documented_lang_options[i].description;
3883 const char * option = documented_lang_options[i].option;
3885 if (description == NULL)
3890 printf (" %-23.23s [undocumented]\n", option);
3892 else if (* description == 0)
3894 else if (option == NULL)
3898 ("\nThere are undocumented %s specific options as well.\n",
3902 printf ("\n Options for %s:\n", description);
3907 printf (" %-23.23s %s\n", option, description);
3912 printf ("\nThere are undocumented %s specific options as well.\n", lang);
3914 if (NUM_ELEM (target_switches) > 1
3915 #ifdef TARGET_OPTIONS
3916 || NUM_ELEM (target_options) > 1
3924 printf ("\nTarget specific options:\n");
3926 for (i = NUM_ELEM (target_switches); i--;)
3928 const char * option = target_switches[i].name;
3929 const char * description = target_switches[i].description;
3931 if (option == NULL || * option == 0)
3933 else if (description == NULL)
3938 printf (" -m%-21.21s [undocumented]\n", option);
3940 else if (* description != 0)
3941 doc += printf (" -m%-21.21s %s\n", option, description);
3944 #ifdef TARGET_OPTIONS
3945 for (i = NUM_ELEM (target_options); i--;)
3947 const char * option = target_options[i].prefix;
3948 const char * description = target_options[i].description;
3950 if (option == NULL || * option == 0)
3952 else if (description == NULL)
3957 printf (" -m%-21.21s [undocumented]\n", option);
3959 else if (* description != 0)
3960 doc += printf (" -m%-21.21s %s\n", option, description);
3966 printf ("\nThere are undocumented target specific options as well.\n");
3968 printf (" They exist, but they are not documented.\n");
3973 /* Parse a -d... comand line switch. */
3976 decode_d_option (arg)
3983 branch_prob_dump = 1;
3988 reorder_blocks_dump = 1;
3991 global_reg_dump = 1;
4007 #ifdef MACHINE_DEPENDENT_REORG
4008 mach_dep_reorg_dump = 1;
4016 branch_prob_dump = 1;
4019 reorder_blocks_dump = 1;
4036 global_reg_dump = 1;
4061 #ifdef MACHINE_DEPENDENT_REORG
4063 mach_dep_reorg_dump = 1;
4067 flag_print_asm_name = 1;
4088 graph_dump_format = vcg;
4094 rtl_dump_and_exit = 1;
4102 case 'D': /* These are handled by the preprocessor. */
4106 warning ("unrecognized gcc debugging option: %c", arg[-1]);
4111 /* Parse a -f... comand line switch. ARG is the value after the -f.
4112 It is safe to access 'ARG - 2' to generate the full switch name.
4113 Return the number of strings consumed. */
4116 decode_f_option (arg)
4121 /* Search for the option in the table of binary f options. */
4122 for (j = sizeof (f_options) / sizeof (f_options[0]); j--;)
4124 if (!strcmp (arg, f_options[j].string))
4126 *f_options[j].variable = f_options[j].on_value;
4130 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4131 && ! strcmp (arg + 3, f_options[j].string))
4133 *f_options[j].variable = ! f_options[j].on_value;
4138 if (!strncmp (arg, "inline-limit-", 13)
4139 || !strncmp (arg, "inline-limit=", 13))
4141 read_integral_parameter (arg + 13, arg - 2, inline_max_insns);
4142 #ifdef INSN_SCHEDULING
4143 else if (!strncmp (arg, "sched-verbose=", 14))
4144 fix_sched_param ("verbose", (const char *)(arg + 14));
4146 else if (!strncmp (arg, "fixed-", 6))
4147 fix_register ((const char *)(arg + 6), 1, 1);
4148 else if (!strncmp (arg, "call-used-", 10))
4149 fix_register ((const char *)(arg + 10), 0, 1);
4150 else if (!strncmp (arg, "call-saved-", 11))
4151 fix_register ((const char *)(arg + 11), 0, 0);
4152 else if (!strncmp (arg, "align-loops=", 12))
4153 align_loops = read_integral_parameter (arg + 12, arg - 2, align_loops);
4154 else if (!strncmp (arg, "align-functions=", 16))
4156 = read_integral_parameter (arg + 16, arg - 2, align_functions);
4157 else if (!strncmp (arg, "align-jumps=", 12))
4158 align_jumps = read_integral_parameter (arg + 12, arg - 2, align_jumps);
4159 else if (!strncmp (arg, "align-labels=", 13))
4160 align_labels = read_integral_parameter (arg + 13, arg - 2, align_labels);
4161 else if (!strncmp (arg, "stack-limit-register=", 21))
4163 int reg = decode_reg_name (arg + 21);
4165 error ("unrecognized register name `%s'", arg + 21);
4167 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
4169 else if (!strncmp (arg, "stack-limit-symbol=", 19))
4173 nm = ggc_alloc_string (arg + 19, strlen (arg + 19));
4175 nm = xstrdup (arg + 19);
4176 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
4178 else if (!strcmp (arg, "no-stack-limit"))
4179 stack_limit_rtx = NULL_RTX;
4180 else if (!strcmp (arg, "preprocessed"))
4181 /* Recognise this switch but do nothing. This prevents warnings
4182 about an unrecognized switch if cpplib has not been linked in. */
4190 /* Parse a -W... comand line switch. ARG is the value after the -W.
4191 It is safe to access 'ARG - 2' to generate the full switch name.
4192 Return the number of strings consumed. */
4195 decode_W_option (arg)
4200 /* Search for the option in the table of binary W options. */
4202 for (j = sizeof (W_options) / sizeof (W_options[0]); j--;)
4204 if (!strcmp (arg, W_options[j].string))
4206 *W_options[j].variable = W_options[j].on_value;
4210 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4211 && ! strcmp (arg + 3, W_options[j].string))
4213 *W_options[j].variable = ! W_options[j].on_value;
4218 if (!strncmp (arg, "id-clash-", 9))
4220 id_clash_len = read_integral_parameter (arg + 9, arg - 2, -1);
4222 if (id_clash_len != -1)
4225 else if (!strncmp (arg, "larger-than-", 12))
4227 larger_than_size = read_integral_parameter (arg + 12, arg - 2, -1);
4229 if (larger_than_size != -1)
4230 warn_larger_than = 1;
4238 /* Parse a -g... comand line switch. ARG is the value after the -g.
4239 It is safe to access 'ARG - 2' to generate the full switch name.
4240 Return the number of strings consumed. */
4243 decode_g_option (arg)
4247 /* A lot of code assumes write_symbols == NO_DEBUG if the
4248 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4249 of what debugging type has been selected). This records the
4250 selected type. It is an error to specify more than one
4252 static enum debug_info_type selected_debug_type = NO_DEBUG;
4253 /* Non-zero if debugging format has been explicitly set.
4254 -g and -ggdb don't explicitly set the debugging format so
4255 -gdwarf -g3 is equivalent to -gdwarf3. */
4256 static int type_explicitly_set_p = 0;
4257 /* Indexed by enum debug_info_type. */
4258 static const char * debug_type_names[] =
4260 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4263 /* The maximum admissible debug level value. */
4264 static const unsigned max_debug_level = 3;
4266 /* Look up ARG in the table. */
4267 for (da = debug_args; da->arg; da++)
4269 const int da_len = strlen (da->arg);
4271 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4273 enum debug_info_type type = da->debug_type;
4274 const char * p = arg + da_len;
4276 if (*p && (*p < '0' || *p > '9'))
4279 /* A debug flag without a level defaults to level 2.
4280 Note we do not want to call read_integral_parameter
4281 for that case since it will call atoi which
4284 ??? We may want to generalize the interface to
4285 read_integral_parameter to better handle this case
4286 if this case shows up often. */
4288 level = read_integral_parameter (p, 0, max_debug_level + 1);
4292 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
4294 error ("use -gdwarf -g%d for DWARF v1, level %d",
4297 error ("use -gdwarf-2 for DWARF v2");
4300 if (level > max_debug_level)
4303 ignoring option `%s' due to invalid debug level specification",
4305 level = debug_info_level;
4308 if (type == NO_DEBUG)
4310 type = PREFERRED_DEBUGGING_TYPE;
4312 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
4314 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4315 type = DWARF2_DEBUG;
4317 #ifdef DBX_DEBUGGING_INFO
4324 if (type == NO_DEBUG)
4325 warning ("`%s': unknown or unsupported -g option", arg - 2);
4327 /* Does it conflict with an already selected type? */
4328 if (type_explicitly_set_p
4329 /* -g/-ggdb don't conflict with anything */
4330 && da->debug_type != NO_DEBUG
4331 && type != selected_debug_type)
4332 warning ("`%s' ignored, conflicts with `-g%s'",
4333 arg - 2, debug_type_names[(int) selected_debug_type]);
4336 /* If the format has already been set, -g/-ggdb
4337 only change the debug level. */
4338 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4339 ; /* don't change debugging type */
4342 selected_debug_type = type;
4343 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4346 write_symbols = (level == 0
4348 : selected_debug_type);
4349 use_gnu_debug_info_extensions = da->use_extensions_p;
4350 debug_info_level = (enum debug_info_level) level;
4358 warning ("`%s': unknown or unsupported -g option", arg - 2);
4363 /* Decode the first argument in the argv as a language-independent option.
4364 Return the number of strings consumed. 'strings_processed' is the
4365 number of strings that have already been decoded in a language
4366 specific fashion before this function was invoked. */
4369 independent_decode_option (argc, argv, strings_processed)
4372 unsigned strings_processed ATTRIBUTE_UNUSED;
4374 char * arg = argv[0];
4376 if (arg[0] != '-' || arg[1] == 0)
4388 if (!strcmp (arg, "-help"))
4403 /* Already been treated in main (). Do nothing. */
4407 set_target_switch (arg + 1);
4411 return decode_f_option (arg + 1);
4414 return decode_g_option (arg + 1);
4417 if (!strcmp (arg, "dumpbase"))
4422 dump_base_name = argv[1];
4426 decode_d_option (arg + 1);
4430 if (!strcmp (arg, "pedantic"))
4432 else if (!strcmp (arg, "pedantic-errors"))
4433 flag_pedantic_errors = pedantic = 1;
4434 else if (arg[1] == 0)
4441 if (!strcmp (arg, "quiet"))
4448 if (!strcmp (arg, "version"))
4456 inhibit_warnings = 1;
4465 /* We save the value of warn_uninitialized, since if they put
4466 -Wuninitialized on the command line, we need to generate a
4467 warning about not using it without also specifying -O. */
4468 if (warn_uninitialized != 1)
4469 warn_uninitialized = 2;
4472 return decode_W_option (arg + 1);
4478 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4479 warning ("`-a' option (basic block profile) not supported");
4481 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4484 else if (!strcmp (arg, "ax"))
4486 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4487 warning ("`-ax' option (jump profiling) not supported");
4489 profile_block_flag = (!profile_block_flag
4490 || profile_block_flag == 2) ? 2 : 3;
4493 else if (!strncmp (arg, "aux-info", 8))
4495 flag_gen_aux_info = 1;
4501 aux_info_file_name = argv[1];
4505 aux_info_file_name = arg + 8;
4517 asm_file_name = argv[1];
4532 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4537 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4541 if (g_switch_val == -1)
4545 g_switch_set = TRUE;
4546 g_switch_value = g_switch_val;
4556 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4557 Exit code is 35 if can't open files, 34 if fatal error,
4558 33 if had nonfatal errors, else success. */
4560 extern int main PARAMS ((int, char **));
4570 /* save in case md file wants to emit args as a comment. */
4574 p = argv[0] + strlen (argv[0]);
4575 while (p != argv[0] && p[-1] != '/'
4576 #ifdef DIR_SEPARATOR
4577 && p[-1] != DIR_SEPARATOR
4583 #ifdef HAVE_LC_MESSAGES
4584 setlocale (LC_MESSAGES, "");
4586 (void) bindtextdomain (PACKAGE, localedir);
4587 (void) textdomain (PACKAGE);
4589 signal (SIGFPE, float_signal);
4592 signal (SIGPIPE, pipe_closed);
4595 decl_printable_name = decl_name;
4596 lang_expand_expr = (lang_expand_expr_t) do_abort;
4598 /* Initialize whether `char' is signed. */
4599 flag_signed_char = DEFAULT_SIGNED_CHAR;
4600 #ifdef DEFAULT_SHORT_ENUMS
4601 /* Initialize how much space enums occupy, by default. */
4602 flag_short_enums = DEFAULT_SHORT_ENUMS;
4605 /* Initialize the garbage-collector. */
4607 ggc_add_root (&input_file_stack, 1, sizeof input_file_stack,
4609 ggc_add_rtx_root (&stack_limit_rtx, 1);
4611 /* Perform language-specific options intialization. */
4612 lang_init_options ();
4614 /* Scan to see what optimization level has been specified. That will
4615 determine the default value of many flags. */
4616 for (i = 1; i < argc; i++)
4618 if (!strcmp (argv[i], "-O"))
4623 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4625 /* Handle -Os, -O2, -O3, -O69, ... */
4626 char *p = &argv[i][2];
4628 if ((p[0] == 's') && (p[1] == 0))
4632 /* Optimizing for size forces optimize to be 2. */
4637 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4638 if (optimize_val != -1)
4640 optimize = optimize_val;
4650 flag_thread_jumps = 1;
4652 flag_delayed_branch = 1;
4654 #ifdef CAN_DEBUG_WITHOUT_FP
4655 flag_omit_frame_pointer = 1;
4661 flag_cse_follow_jumps = 1;
4662 flag_cse_skip_blocks = 1;
4664 flag_expensive_optimizations = 1;
4665 flag_strength_reduce = 1;
4666 flag_rerun_cse_after_loop = 1;
4667 flag_rerun_loop_opt = 1;
4668 flag_caller_saves = 1;
4671 #ifdef INSN_SCHEDULING
4672 flag_schedule_insns = 1;
4673 flag_schedule_insns_after_reload = 1;
4676 flag_strict_aliasing = 1;
4677 flag_delete_null_pointer_checks = 1;
4682 flag_inline_functions = 1;
4685 if (optimize < 2 || optimize_size)
4690 align_functions = 1;
4693 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4696 set_target_switch ("");
4698 #ifdef OPTIMIZATION_OPTIONS
4699 /* Allow default optimizations to be specified on a per-machine basis. */
4700 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4703 /* Initialize register usage now so switches may override. */
4706 /* Perform normal command line switch decoding. */
4707 for (i = 1; i < argc;)
4709 unsigned lang_processed;
4710 unsigned indep_processed;
4712 /* Give the language a chance to decode the option for itself. */
4713 lang_processed = lang_decode_option (argc - i, argv + i);
4715 /* Now see if the option also has a language independent meaning.
4716 Some options are both language specific and language independent,
4717 eg --help. It is possible that there might be options that should
4718 only be decoded in a language independent way if the were not
4719 decoded in a langauge specific way, which is why 'lang_processed'
4721 indep_processed = independent_decode_option (argc - i, argv + i,
4724 if (lang_processed || indep_processed)
4725 i += (lang_processed > indep_processed
4726 ? lang_processed : indep_processed);
4729 const char * option = NULL;
4730 const char * lang = NULL;
4733 /* It is possible that the command line switch is not valid for the
4734 current language, but it is valid for another language. In order
4735 to be compatible with previous versions of the compiler (which
4736 did not issue an error message in this case) we check for this
4737 possibilty here. If we do find a match, then if extra_warnings
4738 is set we generate a warning message, otherwise we will just
4739 ignore the option. */
4740 for (j = 0; j < NUM_ELEM (documented_lang_options); j++)
4742 option = documented_lang_options[j].option;
4745 lang = documented_lang_options[j].description;
4746 else if (! strncmp (argv[i], option, strlen (option)))
4750 if (j != NUM_ELEM (documented_lang_options))
4754 warning ("Ignoring command line option '%s'", argv[i]);
4757 (It is valid for %s but not the selected langauge)", lang);
4761 error ("Unrecognized option `%s'", argv[i]);
4767 /* Checker uses the frame pointer. */
4768 if (flag_check_memory_usage)
4769 flag_omit_frame_pointer = 0;
4773 /* Inlining does not work if not optimizing,
4774 so force it not to be done. */
4778 /* The c_decode_option and lang_decode_option functions set
4779 this to `2' if -Wall is used, so we can avoid giving out
4780 lots of errors for people who don't realize what -Wall does. */
4781 if (warn_uninitialized == 1)
4782 warning ("-Wuninitialized is not supported without -O");
4785 #ifdef OVERRIDE_OPTIONS
4786 /* Some machines may reject certain combinations of options. */
4790 if (exceptions_via_longjmp == 2)
4792 #ifdef DWARF2_UNWIND_INFO
4793 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4795 exceptions_via_longjmp = 1;
4799 /* Set up the align_*_log variables, defaulting them to 1 if they
4800 were still unset. */
4801 if (align_loops <= 0) align_loops = 1;
4802 align_loops_log = floor_log2 (align_loops*2-1);
4803 if (align_jumps <= 0) align_jumps = 1;
4804 align_jumps_log = floor_log2 (align_jumps*2-1);
4805 if (align_labels <= 0) align_labels = 1;
4806 align_labels_log = floor_log2 (align_labels*2-1);
4807 if (align_functions <= 0) align_functions = 1;
4808 align_functions_log = floor_log2 (align_functions*2-1);
4810 if (profile_block_flag == 3)
4812 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4813 profile_block_flag = 2;
4816 /* Unrolling all loops implies that standard loop unrolling must also
4818 if (flag_unroll_all_loops)
4819 flag_unroll_loops = 1;
4820 /* Loop unrolling requires that strength_reduction be on also. Silently
4821 turn on strength reduction here if it isn't already on. Also, the loop
4822 unrolling code assumes that cse will be run after loop, so that must
4823 be turned on also. */
4824 if (flag_unroll_loops)
4826 flag_strength_reduce = 1;
4827 flag_rerun_cse_after_loop = 1;
4830 /* Warn about options that are not supported on this machine. */
4831 #ifndef INSN_SCHEDULING
4832 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4833 warning ("instruction scheduling not supported on this target machine");
4836 if (flag_delayed_branch)
4837 warning ("this target machine does not have delayed branches");
4840 user_label_prefix = USER_LABEL_PREFIX;
4841 if (flag_leading_underscore != -1)
4843 /* If the default prefix is more complicated than "" or "_",
4844 issue a warning and ignore this option. */
4845 if (user_label_prefix[0] == 0 ||
4846 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4848 user_label_prefix = flag_leading_underscore ? "_" : "";
4851 warning ("-f%sleading-underscore not supported on this target machine",
4852 flag_leading_underscore ? "" : "no-");
4855 /* If we are in verbose mode, write out the version and maybe all the
4856 option flags in use. */
4859 print_version (stderr, "");
4861 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4864 compile_file (filename);
4866 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4869 char *lim = (char *) sbrk (0);
4871 fnotice (stderr, "Data size %ld.\n", (long) (lim - (char *) &environ));
4876 system ("ps -l 1>&2");
4879 #endif /* not USG */
4882 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4885 return (FATAL_EXIT_CODE);
4887 return (FATAL_EXIT_CODE);
4888 return (SUCCESS_EXIT_CODE);
4891 /* Decode -m switches. */
4892 /* Decode the switch -mNAME. */
4895 set_target_switch (name)
4899 int valid_target_option = 0;
4901 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4902 if (!strcmp (target_switches[j].name, name))
4904 if (target_switches[j].value < 0)
4905 target_flags &= ~-target_switches[j].value;
4907 target_flags |= target_switches[j].value;
4908 valid_target_option = 1;
4911 #ifdef TARGET_OPTIONS
4912 if (!valid_target_option)
4913 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4915 int len = strlen (target_options[j].prefix);
4916 if (!strncmp (target_options[j].prefix, name, len))
4918 *target_options[j].variable = name + len;
4919 valid_target_option = 1;
4924 if (!valid_target_option)
4925 error ("Invalid option `%s'", name);
4928 /* Print version information to FILE.
4929 Each line begins with INDENT (for the case where FILE is the
4930 assembler output file). */
4933 print_version (file, indent)
4938 #define __VERSION__ "[?]"
4942 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4944 "%s%s%s version %s (%s) compiled by CC.\n"
4946 , indent, *indent != 0 ? " " : "",
4947 language_string, version_string, TARGET_NAME, __VERSION__);
4950 /* Print an option value and return the adjusted position in the line.
4951 ??? We don't handle error returns from fprintf (disk full); presumably
4952 other code will catch a disk full though. */
4955 print_single_switch (file, pos, max, indent, sep, term, type, name)
4958 const char *indent, *sep, *term, *type, *name;
4960 /* The ultrix fprintf returns 0 on success, so compute the result we want
4961 here since we need it for the following test. */
4962 int len = strlen (sep) + strlen (type) + strlen (name);
4967 fprintf (file, "%s", term);
4972 fprintf (file, "%s", indent);
4973 pos = strlen (indent);
4975 fprintf (file, "%s%s%s", sep, type, name);
4980 /* Print active target switches to FILE.
4981 POS is the current cursor position and MAX is the size of a "line".
4982 Each line begins with INDENT and ends with TERM.
4983 Each switch is separated from the next by SEP. */
4986 print_switch_values (file, pos, max, indent, sep, term)
4989 const char *indent, *sep, *term;
4994 /* Print the options as passed. */
4996 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4997 _("options passed: "), "");
4999 for (p = &save_argv[1]; *p != NULL; p++)
5003 if (strcmp (*p, "-o") == 0)
5009 if (strcmp (*p, "-quiet") == 0)
5011 if (strcmp (*p, "-version") == 0)
5016 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
5019 fprintf (file, "%s", term);
5021 /* Print the -f and -m options that have been enabled.
5022 We don't handle language specific options but printing argv
5025 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
5026 _("options enabled: "), "");
5028 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
5029 if (*f_options[j].variable == f_options[j].on_value)
5030 pos = print_single_switch (file, pos, max, indent, sep, term,
5031 "-f", f_options[j].string);
5033 /* Print target specific options. */
5035 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
5036 if (target_switches[j].name[0] != '\0'
5037 && target_switches[j].value > 0
5038 && ((target_switches[j].value & target_flags)
5039 == target_switches[j].value))
5041 pos = print_single_switch (file, pos, max, indent, sep, term,
5042 "-m", target_switches[j].name);
5045 #ifdef TARGET_OPTIONS
5046 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
5047 if (*target_options[j].variable != NULL)
5050 sprintf (prefix, "-m%s", target_options[j].prefix);
5051 pos = print_single_switch (file, pos, max, indent, sep, term,
5052 prefix, *target_options[j].variable);
5056 fprintf (file, "%s", term);
5059 /* Record the beginning of a new source file, named FILENAME. */
5062 debug_start_source_file (filename)
5063 register char *filename ATTRIBUTE_UNUSED;
5065 #ifdef DBX_DEBUGGING_INFO
5066 if (write_symbols == DBX_DEBUG)
5067 dbxout_start_new_source_file (filename);
5069 #ifdef DWARF_DEBUGGING_INFO
5070 if (debug_info_level == DINFO_LEVEL_VERBOSE
5071 && write_symbols == DWARF_DEBUG)
5072 dwarfout_start_new_source_file (filename);
5073 #endif /* DWARF_DEBUGGING_INFO */
5074 #ifdef DWARF2_DEBUGGING_INFO
5075 if (debug_info_level == DINFO_LEVEL_VERBOSE
5076 && write_symbols == DWARF2_DEBUG)
5077 dwarf2out_start_source_file (filename);
5078 #endif /* DWARF2_DEBUGGING_INFO */
5079 #ifdef SDB_DEBUGGING_INFO
5080 if (write_symbols == SDB_DEBUG)
5081 sdbout_start_new_source_file (filename);
5085 /* Record the resumption of a source file. LINENO is the line number in
5086 the source file we are returning to. */
5089 debug_end_source_file (lineno)
5090 register unsigned lineno ATTRIBUTE_UNUSED;
5092 #ifdef DBX_DEBUGGING_INFO
5093 if (write_symbols == DBX_DEBUG)
5094 dbxout_resume_previous_source_file ();
5096 #ifdef DWARF_DEBUGGING_INFO
5097 if (debug_info_level == DINFO_LEVEL_VERBOSE
5098 && write_symbols == DWARF_DEBUG)
5099 dwarfout_resume_previous_source_file (lineno);
5100 #endif /* DWARF_DEBUGGING_INFO */
5101 #ifdef DWARF2_DEBUGGING_INFO
5102 if (debug_info_level == DINFO_LEVEL_VERBOSE
5103 && write_symbols == DWARF2_DEBUG)
5104 dwarf2out_end_source_file ();
5105 #endif /* DWARF2_DEBUGGING_INFO */
5106 #ifdef SDB_DEBUGGING_INFO
5107 if (write_symbols == SDB_DEBUG)
5108 sdbout_resume_previous_source_file ();
5112 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5113 the tail part of the directive line, i.e. the part which is past the
5114 initial whitespace, #, whitespace, directive-name, whitespace part. */
5117 debug_define (lineno, buffer)
5118 register unsigned lineno ATTRIBUTE_UNUSED;
5119 register char *buffer ATTRIBUTE_UNUSED;
5121 #ifdef DWARF_DEBUGGING_INFO
5122 if (debug_info_level == DINFO_LEVEL_VERBOSE
5123 && write_symbols == DWARF_DEBUG)
5124 dwarfout_define (lineno, buffer);
5125 #endif /* DWARF_DEBUGGING_INFO */
5126 #ifdef DWARF2_DEBUGGING_INFO
5127 if (debug_info_level == DINFO_LEVEL_VERBOSE
5128 && write_symbols == DWARF2_DEBUG)
5129 dwarf2out_define (lineno, buffer);
5130 #endif /* DWARF2_DEBUGGING_INFO */
5133 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5134 the tail part of the directive line, i.e. the part which is past the
5135 initial whitespace, #, whitespace, directive-name, whitespace part. */
5138 debug_undef (lineno, buffer)
5139 register unsigned lineno ATTRIBUTE_UNUSED;
5140 register char *buffer ATTRIBUTE_UNUSED;
5142 #ifdef DWARF_DEBUGGING_INFO
5143 if (debug_info_level == DINFO_LEVEL_VERBOSE
5144 && write_symbols == DWARF_DEBUG)
5145 dwarfout_undef (lineno, buffer);
5146 #endif /* DWARF_DEBUGGING_INFO */
5147 #ifdef DWARF2_DEBUGGING_INFO
5148 if (debug_info_level == DINFO_LEVEL_VERBOSE
5149 && write_symbols == DWARF2_DEBUG)
5150 dwarf2out_undef (lineno, buffer);
5151 #endif /* DWARF2_DEBUGGING_INFO */