1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 88, 89, 92-98, 1999, 2000 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* This is the top level of cc1/c++.
22 It parses command args, opens files, invokes the various passes
23 in the proper order, and counts the time used by each.
24 Error messages and low-level interface to malloc also handled here. */
27 #undef FLOAT /* This is for hpux. They should change hpux. */
28 #undef FFS /* Some systems define this in param.h. */
33 #ifdef HAVE_SYS_RESOURCE_H
34 # include <sys/resource.h>
37 #ifdef HAVE_SYS_TIMES_H
38 # include <sys/times.h>
46 #include "insn-attr.h"
47 #include "insn-codes.h"
48 #include "insn-config.h"
56 #include "basic-block.h"
63 #ifdef DWARF_DEBUGGING_INFO
67 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
68 #include "dwarf2out.h"
71 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
75 #ifdef SDB_DEBUGGING_INFO
79 #ifdef XCOFF_DEBUGGING_INFO
84 /* The extra parameters substantially improve the I/O performance. */
86 vms_fopen (fname, type)
90 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
91 fixed arguments, which matches ANSI's specification but not VAXCRTL's
92 pre-ANSI implementation. This hack circumvents the mismatch problem. */
93 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
96 return (*vmslib_fopen) (fname, type, "mbc=32",
97 "deq=64", "fop=tef", "shr=nil");
99 return (*vmslib_fopen) (fname, type, "mbc=32");
101 #define fopen vms_fopen
104 #ifndef DEFAULT_GDB_EXTENSIONS
105 #define DEFAULT_GDB_EXTENSIONS 1
108 /* If more than one debugging type is supported, you must define
109 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
111 This is one long line cause VAXC can't handle a \-newline. */
112 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
113 #ifndef PREFERRED_DEBUGGING_TYPE
114 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
115 #endif /* no PREFERRED_DEBUGGING_TYPE */
116 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
117 so the following code needn't care. */
118 #ifdef DBX_DEBUGGING_INFO
119 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
121 #ifdef SDB_DEBUGGING_INFO
122 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
124 #ifdef DWARF_DEBUGGING_INFO
125 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
127 #ifdef DWARF2_DEBUGGING_INFO
128 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
130 #ifdef XCOFF_DEBUGGING_INFO
131 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
133 #endif /* More than one debugger format enabled. */
135 /* If still not defined, must have been because no debugging formats
137 #ifndef PREFERRED_DEBUGGING_TYPE
138 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
141 #ifdef NEED_DECLARATION_ENVIRON
142 extern char **environ;
144 extern char *version_string;
146 /* Carry information from ASM_DECLARE_OBJECT_NAME
147 to ASM_FINISH_DECLARE_OBJECT. */
149 extern int size_directive_output;
150 extern tree last_assemble_variable_decl;
152 static void set_target_switch PARAMS ((const char *));
153 static const char *decl_name PARAMS ((tree, int));
155 extern void set_fatal_function PARAMS ((void (*)(const char *, va_list)));
156 static void float_signal PARAMS ((int)) ATTRIBUTE_NORETURN;
157 static void pipe_closed PARAMS ((int)) ATTRIBUTE_NORETURN;
158 #ifdef ASM_IDENTIFY_LANGUAGE
159 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
160 static void output_lang_identify PARAMS ((FILE *)) ATTRIBUTE_UNUSED;
162 static void open_dump_file PARAMS ((const char *, const char *));
163 static void close_dump_file PARAMS ((void (*) (FILE *, rtx), rtx));
164 static void dump_rtl PARAMS ((const char *, tree, void (*) (FILE *, rtx), rtx));
165 static void clean_dump_file PARAMS ((const char *));
166 static void compile_file PARAMS ((char *));
167 static void display_help PARAMS ((void));
168 static void mark_file_stack PARAMS ((void *));
170 static void decode_d_option PARAMS ((const char *));
171 static int decode_f_option PARAMS ((const char *));
172 static int decode_W_option PARAMS ((const char *));
173 static int decode_g_option PARAMS ((const char *));
174 static unsigned independent_decode_option PARAMS ((int, char **, unsigned));
176 static void print_version PARAMS ((FILE *, const char *));
177 static int print_single_switch PARAMS ((FILE *, int, int, const char *,
178 const char *, const char *,
179 const char *, const char *));
180 static void print_switch_values PARAMS ((FILE *, int, int, const char *,
181 const char *, const char *));
183 /* Length of line when printing switch values. */
186 /* Name of program invoked, sans directories. */
188 const char *progname;
190 /* Copy of arguments to main. */
194 /* Name of current original source file (what was input to cpp).
195 This comes from each #-command in the actual input. */
197 char *input_filename;
199 /* Name of top-level original source file (what was input to cpp).
200 This comes from the #-command at the beginning of the actual input.
201 If there isn't any there, then this is the cc1 input file name. */
203 char *main_input_filename;
205 /* Current line number in real source file. */
209 /* Nonzero if it is unsafe to create any new pseudo registers. */
212 /* Stack of currently pending input files. */
214 struct file_stack *input_file_stack;
216 /* Incremented on each change to input_file_stack. */
217 int input_file_stack_tick;
219 /* Name to use as base of names for dump output files. */
221 const char *dump_base_name;
223 /* Bit flags that specify the machine subtype we are compiling for.
224 Bits are tested using macros TARGET_... defined in the tm.h file
225 and set by `-m...' switches. Must be defined in rtlanal.c. */
227 extern int target_flags;
229 /* Flags saying which kinds of debugging dump have been requested. */
232 int rtl_dump_and_exit = 0;
233 int jump_opt_dump = 0;
234 int addressof_dump = 0;
239 int branch_prob_dump = 0;
241 int combine_dump = 0;
242 int regmove_dump = 0;
244 int local_reg_dump = 0;
245 int global_reg_dump = 0;
247 int peephole2_dump = 0;
249 int jump2_opt_dump = 0;
251 int dbr_sched_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 for -pedantic switch: warn about anything
356 that standard spec forbids. */
360 /* Temporarily suppress certain warnings.
361 This is set while reading code from a system header file. */
363 int in_system_header = 0;
365 /* Don't print functions as they are compiled and don't print
366 times taken by the various passes. -quiet. */
372 /* Nonzero means `char' should be signed. */
374 int flag_signed_char;
376 /* Nonzero means give an enum type only as many bytes as it needs. */
378 int flag_short_enums;
380 /* Nonzero for -fcaller-saves: allocate values in regs that need to
381 be saved across function calls, if that produces overall better code.
382 Optional now, so people can test it. */
384 #ifdef DEFAULT_CALLER_SAVES
385 int flag_caller_saves = 1;
387 int flag_caller_saves = 0;
390 /* Nonzero if structures and unions should be returned in memory.
392 This should only be defined if compatibility with another compiler or
393 with an ABI is needed, because it results in slower code. */
395 #ifndef DEFAULT_PCC_STRUCT_RETURN
396 #define DEFAULT_PCC_STRUCT_RETURN 1
399 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
401 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
403 /* Nonzero for -fforce-mem: load memory value into a register
404 before arithmetic on it. This makes better cse but slower compilation. */
406 int flag_force_mem = 0;
408 /* Nonzero for -fforce-addr: load memory address into a register before
409 reference to memory. This makes better cse but slower compilation. */
411 int flag_force_addr = 0;
413 /* Nonzero for -fdefer-pop: don't pop args after each function call;
414 instead save them up to pop many calls' args with one insns. */
416 int flag_defer_pop = 0;
418 /* Nonzero for -ffloat-store: don't allocate floats and doubles
419 in extended-precision registers. */
421 int flag_float_store = 0;
423 /* Nonzero for -fcse-follow-jumps:
424 have cse follow jumps to do a more extensive job. */
426 int flag_cse_follow_jumps;
428 /* Nonzero for -fcse-skip-blocks:
429 have cse follow a branch around a block. */
430 int flag_cse_skip_blocks;
432 /* Nonzero for -fexpensive-optimizations:
433 perform miscellaneous relatively-expensive optimizations. */
434 int flag_expensive_optimizations;
436 /* Nonzero for -fthread-jumps:
437 have jump optimize output of loop. */
439 int flag_thread_jumps;
441 /* Nonzero enables strength-reduction in loop.c. */
443 int flag_strength_reduce = 0;
445 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
446 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
447 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
450 int flag_unroll_loops;
452 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
453 This is generally not a win. */
455 int flag_unroll_all_loops;
457 /* Nonzero forces all invariant computations in loops to be moved
460 int flag_move_all_movables = 0;
462 /* Nonzero forces all general induction variables in loops to be
465 int flag_reduce_all_givs = 0;
467 /* Nonzero to perform full register move optimization passes. This is the
470 int flag_regmove = 0;
472 /* Nonzero for -fwritable-strings:
473 store string constants in data segment and don't uniquize them. */
475 int flag_writable_strings = 0;
477 /* Nonzero means don't put addresses of constant functions in registers.
478 Used for compiling the Unix kernel, where strange substitutions are
479 done on the assembly output. */
481 int flag_no_function_cse = 0;
483 /* Nonzero for -fomit-frame-pointer:
484 don't make a frame pointer in simple functions that don't require one. */
486 int flag_omit_frame_pointer = 0;
488 /* Nonzero means place each function into its own section on those platforms
489 which support arbitrary section names and unlimited numbers of sections. */
491 int flag_function_sections = 0;
493 /* ... and similar for data. */
495 int flag_data_sections = 0;
497 /* Nonzero to inhibit use of define_optimization peephole opts. */
499 int flag_no_peephole = 0;
501 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
502 operations in the interest of optimization. For example it allows
503 GCC to assume arguments to sqrt are nonnegative numbers, allowing
504 faster code for sqrt to be generated. */
506 int flag_fast_math = 0;
508 /* Nonzero means the front end generally wants `errno' maintained by math
509 operations, like built-in SQRT, unless overridden by flag_fast_math. */
511 int flag_errno_math = 1;
513 /* 0 means straightforward implementation of complex divide acceptable.
514 1 means wide ranges of inputs must work for complex divide.
515 2 means C9X-like requirements for complex divide (not yet implemented). */
517 int flag_complex_divide_method = 0;
519 /* Nonzero means all references through pointers are volatile. */
523 /* Nonzero means treat all global and extern variables as volatile. */
525 int flag_volatile_global;
527 /* Nonzero means treat all static variables as volatile. */
529 int flag_volatile_static;
531 /* Nonzero means just do syntax checking; don't output anything. */
533 int flag_syntax_only = 0;
535 /* Nonzero means perform global cse. */
537 static int flag_gcse;
539 /* Nonzero means to use global dataflow analysis to eliminate
540 useless null pointer tests. */
542 static int flag_delete_null_pointer_checks;
544 /* Nonzero means to rerun cse after loop optimization. This increases
545 compilation time about 20% and picks up a few more common expressions. */
547 static int flag_rerun_cse_after_loop;
549 /* Nonzero means to run loop optimizations twice. */
551 int flag_rerun_loop_opt;
553 /* Nonzero for -finline-functions: ok to inline functions that look like
554 good inline candidates. */
556 int flag_inline_functions;
558 /* Nonzero for -fkeep-inline-functions: even if we make a function
559 go inline everywhere, keep its definition around for debugging
562 int flag_keep_inline_functions;
564 /* Nonzero means that functions will not be inlined. */
568 /* Nonzero means that we should emit static const variables
569 regardless of whether or not optimization is turned on. */
571 int flag_keep_static_consts = 1;
573 /* Nonzero means we should be saving declaration info into a .X file. */
575 int flag_gen_aux_info = 0;
577 /* Specified name of aux-info file. */
579 static char *aux_info_file_name;
581 /* Nonzero means make the text shared if supported. */
583 int flag_shared_data;
585 /* Nonzero means schedule into delayed branch slots if supported. */
587 int flag_delayed_branch;
589 /* Nonzero if we are compiling pure (sharable) code.
590 Value is 1 if we are doing reasonable (i.e. simple
591 offset into offset table) pic. Value is 2 if we can
592 only perform register offsets. */
596 /* Nonzero means generate extra code for exception handling and enable
597 exception handling. */
601 /* Nonzero means use the new model for exception handling. Replaces
602 -DNEW_EH_MODEL as a compile option. */
604 int flag_new_exceptions = 1;
606 /* Nonzero means generate frame unwind info table when supported */
608 int flag_unwind_tables = 0;
610 /* Nonzero means don't place uninitialized global data in common storage
615 /* Nonzero means pretend it is OK to examine bits of target floats,
616 even if that isn't true. The resulting code will have incorrect constants,
617 but the same series of instructions that the native compiler would make. */
619 int flag_pretend_float;
621 /* Nonzero means change certain warnings into errors.
622 Usually these are warnings about failure to conform to some standard. */
624 int flag_pedantic_errors = 0;
626 /* flag_schedule_insns means schedule insns within basic blocks (before
628 flag_schedule_insns_after_reload means schedule insns after
631 int flag_schedule_insns = 0;
632 int flag_schedule_insns_after_reload = 0;
634 /* The following flags have effect only for scheduling before register
637 flag_schedule_interblock means schedule insns accross basic blocks.
638 flag_schedule_speculative means allow speculative motion of non-load insns.
639 flag_schedule_speculative_load means allow speculative motion of some
641 flag_schedule_speculative_load_dangerous allows speculative motion of more
644 int flag_schedule_interblock = 1;
645 int flag_schedule_speculative = 1;
646 int flag_schedule_speculative_load = 0;
647 int flag_schedule_speculative_load_dangerous = 0;
649 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
650 by a cheaper branch, on a count register. */
651 int flag_branch_on_count_reg;
653 /* -finhibit-size-directive inhibits output of .size for ELF.
654 This is used only for compiling crtstuff.c,
655 and it may be extended to other effects
656 needed for crtstuff.c on other systems. */
657 int flag_inhibit_size_directive = 0;
659 /* -fverbose-asm causes extra commentary information to be produced in
660 the generated assembly code (to make it more readable). This option
661 is generally only of use to those who actually need to read the
662 generated assembly code (perhaps while debugging the compiler itself).
663 -fno-verbose-asm, the default, causes the extra information
664 to be omitted and is useful when comparing two assembler files. */
666 int flag_verbose_asm = 0;
668 /* -dA causes debug commentary information to be produced in
669 the generated assembly code (to make it more readable). This option
670 is generally only of use to those who actually need to read the
671 generated assembly code (perhaps while debugging the compiler itself).
672 Currently, this switch is only used by dwarfout.c; however, it is intended
673 to be a catchall for printing debug information in the assembler file. */
675 int flag_debug_asm = 0;
677 /* -fgnu-linker specifies use of the GNU linker for initializations.
678 (Or, more generally, a linker that handles initializations.)
679 -fno-gnu-linker says that collect2 will be used. */
681 int flag_gnu_linker = 0;
683 int flag_gnu_linker = 1;
686 /* Tag all structures with __attribute__(packed) */
687 int flag_pack_struct = 0;
689 /* Emit code to check for stack overflow; also may cause large objects
690 to be allocated dynamically. */
691 int flag_stack_check;
693 /* When non-NULL, indicates that whenever space is allocated on the
694 stack, the resulting stack pointer must not pass this
695 address---that is, for stacks that grow downward, the stack pointer
696 must always be greater than or equal to this address; for stacks
697 that grow upward, the stack pointer must be less than this address.
698 At present, the rtx may be either a REG or a SYMBOL_REF, although
699 the support provided depends on the backend. */
702 /* -fcheck-memory-usage causes extra code to be generated in order to check
703 memory accesses. This is used by a detector of bad memory accesses such
705 int flag_check_memory_usage = 0;
707 /* -fprefix-function-name causes function name to be prefixed. This
708 can be used with -fcheck-memory-usage to isolate code compiled with
709 -fcheck-memory-usage. */
710 int flag_prefix_function_name = 0;
712 /* 0 if pointer arguments may alias each other. True in C.
713 1 if pointer arguments may not alias each other but may alias
715 2 if pointer arguments may not alias each other and may not
716 alias global variables. True in Fortran.
717 This defaults to 0 for C. */
718 int flag_argument_noalias = 0;
720 /* Nonzero if we should do (language-dependent) alias analysis.
721 Typically, this analysis will assume that expressions of certain
722 types do not alias expressions of certain other types. Only used
723 if alias analysis (in general) is enabled. */
724 int flag_strict_aliasing = 0;
726 /* Instrument functions with calls at entry and exit, for profiling. */
727 int flag_instrument_function_entry_exit = 0;
729 /* Nonzero means ignore `#ident' directives. 0 means handle them.
730 On SVR4 targets, it also controls whether or not to emit a
731 string identifying the compiler. */
733 int flag_no_ident = 0;
735 /* This will perform a peephole pass before sched2. */
736 int flag_peephole2 = 0;
738 /* -fbounded-pointers causes gcc to compile pointers as composite
739 objects occupying three words: the pointer value, the base address
740 of the referent object, and the address immediately beyond the end
741 of the referent object. The base and extent allow us to perform
742 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
743 int flag_bounded_pointers = 0;
745 /* -fcheck-bounds causes gcc to generate array bounds checks.
746 For C, C++: defaults to value of flag_bounded_pointers.
747 For ObjC: defaults to off.
748 For Java: defaults to on.
749 For Fortran: defaults to off.
750 For CHILL: defaults to off. */
751 int flag_bounds_check = 0;
753 /* If one, renumber instruction UIDs to reduce the number of
754 unused UIDs if there are a lot of instructions. If greater than
755 one, unconditionally renumber instruction UIDs. */
756 int flag_renumber_insns = 1;
758 /* Values of the -falign-* flags: how much to align labels in code.
759 0 means `use default', 1 means `don't align'.
760 For each variable, there is an _log variant which is the power
761 of two not less than the variable, for .align output. */
768 int align_labels_log;
770 int align_functions_log;
772 /* Table of supported debugging formats. */
776 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
777 constant expression, we use NO_DEBUG in its place. */
778 enum debug_info_type debug_type;
779 int use_extensions_p;
780 const char * description;
784 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
785 "Generate default debug format output" },
786 { "gdb", NO_DEBUG, 1, "Generate default extended debug format output" },
787 #ifdef DBX_DEBUGGING_INFO
788 { "stabs", DBX_DEBUG, 0, "Generate STABS format debug output" },
789 { "stabs+", DBX_DEBUG, 1, "Generate extended STABS format debug output" },
791 #ifdef DWARF_DEBUGGING_INFO
792 { "dwarf", DWARF_DEBUG, 0, "Generate DWARF-1 format debug output"},
793 { "dwarf+", DWARF_DEBUG, 1,
794 "Generated extended DWARF-1 format debug output" },
796 #ifdef DWARF2_DEBUGGING_INFO
797 { "dwarf-2", DWARF2_DEBUG, 0, "Enable DWARF-2 debug output" },
799 #ifdef XCOFF_DEBUGGING_INFO
800 { "xcoff", XCOFF_DEBUG, 0, "Generate XCOFF format debug output" },
801 { "xcoff+", XCOFF_DEBUG, 1, "Generate extended XCOFF format debug output" },
803 #ifdef SDB_DEBUGGING_INFO
804 { "coff", SDB_DEBUG, 0, "Generate COFF format debug output" },
814 const char * description;
816 lang_independent_options;
818 /* Add or remove a leading underscore from user symbols. */
819 int flag_leading_underscore = -1;
821 /* The user symbol prefix after having resolved same. */
822 const char *user_label_prefix;
824 /* A default for same. */
825 #ifndef USER_LABEL_PREFIX
826 #define USER_LABEL_PREFIX ""
829 /* Table of language-independent -f options.
830 STRING is the option name. VARIABLE is the address of the variable.
831 ON_VALUE is the value to store in VARIABLE
832 if `-fSTRING' is seen as an option.
833 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
835 lang_independent_options f_options[] =
837 {"float-store", &flag_float_store, 1,
838 "Do not store floats in registers" },
839 {"volatile", &flag_volatile, 1,
840 "Consider all mem refs through pointers as volatile"},
841 {"volatile-global", &flag_volatile_global, 1,
842 "Consider all mem refs to global data to be volatile" },
843 {"volatile-static", &flag_volatile_static, 1,
844 "Consider all mem refs to static data to be volatile" },
845 {"defer-pop", &flag_defer_pop, 1,
846 "Defer popping functions args from stack until later" },
847 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
848 "When possible do not generate stack frames"},
849 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
850 "When running CSE, follow jumps to their targets" },
851 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
852 "When running CSE, follow conditional jumps" },
853 {"expensive-optimizations", &flag_expensive_optimizations, 1,
854 "Perform a number of minor, expensive optimisations" },
855 {"thread-jumps", &flag_thread_jumps, 1,
856 "Perform jump threading optimisations"},
857 {"strength-reduce", &flag_strength_reduce, 1,
858 "Perform strength reduction optimisations" },
859 {"unroll-loops", &flag_unroll_loops, 1,
860 "Perform loop unrolling when iteration count is known" },
861 {"unroll-all-loops", &flag_unroll_all_loops, 1,
862 "Perform loop unrolling for all loops" },
863 {"move-all-movables", &flag_move_all_movables, 1,
864 "Force all loop invariant computations out of loops" },
865 {"reduce-all-givs", &flag_reduce_all_givs, 1,
866 "Strength reduce all loop general induction variables" },
867 {"writable-strings", &flag_writable_strings, 1,
868 "Store strings in writable data section" },
869 {"peephole", &flag_no_peephole, 0,
870 "Enable machine specific peephole optimisations" },
871 {"force-mem", &flag_force_mem, 1,
872 "Copy memory operands into registers before using" },
873 {"force-addr", &flag_force_addr, 1,
874 "Copy memory address constants into regs before using" },
875 {"function-cse", &flag_no_function_cse, 0,
876 "Allow function addresses to be held in registers" },
877 {"inline-functions", &flag_inline_functions, 1,
878 "Integrate simple functions into their callers" },
879 {"keep-inline-functions", &flag_keep_inline_functions, 1,
880 "Generate code for funcs even if they are fully inlined" },
881 {"inline", &flag_no_inline, 0,
882 "Pay attention to the 'inline' keyword"},
883 {"keep-static-consts", &flag_keep_static_consts, 1,
884 "Emit static const variables even if they are not used" },
885 {"syntax-only", &flag_syntax_only, 1,
886 "Check for syntax errors, then stop" },
887 {"shared-data", &flag_shared_data, 1,
888 "Mark data as shared rather than private" },
889 {"caller-saves", &flag_caller_saves, 1,
890 "Enable saving registers around function calls" },
891 {"pcc-struct-return", &flag_pcc_struct_return, 1,
892 "Return 'short' aggregates in memory, not registers" },
893 {"reg-struct-return", &flag_pcc_struct_return, 0,
894 "Return 'short' aggregates in registers" },
895 {"delayed-branch", &flag_delayed_branch, 1,
896 "Attempt to fill delay slots of branch instructions" },
897 {"gcse", &flag_gcse, 1,
898 "Perform the global common subexpression elimination" },
899 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
900 "Run CSE pass after loop optimisations"},
901 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
902 "Run the loop optimiser twice"},
903 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
904 "Delete useless null pointer checks" },
905 {"pretend-float", &flag_pretend_float, 1,
906 "Pretend that host and target use the same FP format"},
907 {"schedule-insns", &flag_schedule_insns, 1,
908 "Reschedule instructions to avoid pipeline stalls"},
909 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
910 "Run two passes of the instruction scheduler"},
911 {"sched-interblock",&flag_schedule_interblock, 1,
912 "Enable scheduling across basic blocks" },
913 {"sched-spec",&flag_schedule_speculative, 1,
914 "Allow speculative motion of non-loads" },
915 {"sched-spec-load",&flag_schedule_speculative_load, 1,
916 "Allow speculative motion of some loads" },
917 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
918 "Allow speculative motion of more loads" },
919 {"branch-count-reg",&flag_branch_on_count_reg, 1,
920 "Replace add,compare,branch with branch on count reg"},
921 {"pic", &flag_pic, 1,
922 "Generate position independent code, if possible"},
923 {"PIC", &flag_pic, 2, ""},
924 {"exceptions", &flag_exceptions, 1,
925 "Enable exception handling" },
926 {"new-exceptions", &flag_new_exceptions, 1,
927 "Use the new model for exception handling" },
928 {"unwind-tables", &flag_unwind_tables, 1,
929 "Just generate unwind tables for exception handling" },
930 {"sjlj-exceptions", &exceptions_via_longjmp, 1,
931 "Use setjmp/longjmp to handle exceptions" },
932 {"asynchronous-exceptions", &asynchronous_exceptions, 1,
933 "Support asynchronous exceptions" },
934 {"profile-arcs", &profile_arc_flag, 1,
935 "Insert arc based program profiling code" },
936 {"test-coverage", &flag_test_coverage, 1,
937 "Create data files needed by gcov" },
938 {"branch-probabilities", &flag_branch_probabilities, 1,
939 "Use profiling information for branch probabilities" },
940 {"fast-math", &flag_fast_math, 1,
941 "Improve FP speed by violating ANSI & IEEE rules" },
942 {"common", &flag_no_common, 0,
943 "Do not put unitialised globals in the common section" },
944 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
945 "Do not generate .size directives" },
946 {"function-sections", &flag_function_sections, 1,
947 "place each function into its own section" },
948 {"data-sections", &flag_data_sections, 1,
949 "place data items into their own section" },
950 {"verbose-asm", &flag_verbose_asm, 1,
951 "Add extra commentry to assembler output"},
952 {"gnu-linker", &flag_gnu_linker, 1,
953 "Output GNU ld formatted global initialisers"},
954 {"regmove", &flag_regmove, 1,
955 "Enables a register move optimisation"},
956 {"optimize-register-move", &flag_regmove, 1,
957 "Do the full regmove optimization pass"},
958 {"pack-struct", &flag_pack_struct, 1,
959 "Pack structure members together without holes" },
960 {"stack-check", &flag_stack_check, 1,
961 "Insert stack checking code into the program" },
962 {"argument-alias", &flag_argument_noalias, 0,
963 "Specify that arguments may alias each other & globals"},
964 {"argument-noalias", &flag_argument_noalias, 1,
965 "Assume arguments may alias globals but not each other"},
966 {"argument-noalias-global", &flag_argument_noalias, 2,
967 "Assume arguments do not alias each other or globals" },
968 {"strict-aliasing", &flag_strict_aliasing, 1,
969 "Assume strict aliasing rules apply" },
970 {"align-loops", &align_loops, 0,
971 "Align the start of loops" },
972 {"align-jumps", &align_jumps, 0,
973 "Align labels which are only reached by jumping" },
974 {"align-labels", &align_labels, 0,
975 "Align all labels" },
976 {"align-functions", &align_functions, 0,
977 "Align the start of functions" },
978 {"check-memory-usage", &flag_check_memory_usage, 1,
979 "Generate code to check every memory access" },
980 {"prefix-function-name", &flag_prefix_function_name, 1,
981 "Add a prefix to all function names" },
982 {"dump-unnumbered", &flag_dump_unnumbered, 1,
983 "Suppress output of instruction numbers and line number notes in debugging dumps"},
984 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
985 "Instrument function entry/exit with profiling calls"},
986 {"leading-underscore", &flag_leading_underscore, 1,
987 "External symbols have a leading underscore" },
988 {"ident", &flag_no_ident, 0,
989 "Process #ident directives"},
990 { "peephole2", &flag_peephole2, 1,
991 "Enables an rtl peephole pass run before sched2" },
992 {"math-errno", &flag_errno_math, 1,
993 "Set errno after built-in math functions"},
994 {"bounded-pointers", &flag_bounded_pointers, 1,
995 "Compile pointers as triples: value, base & end" },
996 {"bounds-check", &flag_bounds_check, 1,
997 "Generate code to check bounds before dereferencing pointers and arrays" }
1000 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1002 /* Table of language-specific options. */
1004 static struct lang_opt
1006 const char * option;
1007 const char * description;
1009 documented_lang_options[] =
1011 /* In order not to overload the --help output, the convention
1012 used here is to only describe those options which are not
1013 enabled by default. */
1015 { "-ansi", "Compile just for ANSI C" },
1016 { "-fallow-single-precision",
1017 "Do not promote floats to double if using -traditional" },
1018 { "-std= ", "Determine language standard"},
1020 { "-fsigned-bitfields", "" },
1021 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1022 { "-fno-signed-bitfields", "" },
1023 { "-fno-unsigned-bitfields","" },
1024 { "-fsigned-char", "Make 'char' be signed by default"},
1025 { "-funsigned-char", "Make 'char' be unsigned by default"},
1026 { "-fno-signed-char", "" },
1027 { "-fno-unsigned-char", "" },
1029 { "-ftraditional", "" },
1030 { "-traditional", "Attempt to support traditional K&R style C"},
1031 { "-fnotraditional", "" },
1032 { "-fno-traditional", "" },
1035 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1036 { "-fbuiltin", "" },
1037 { "-fno-builtin", "Do not recognise any built in functions" },
1038 { "-fhosted", "Assume normal C execution environment" },
1039 { "-fno-hosted", "" },
1041 "Assume that standard libraries & main might not exist" },
1042 { "-fno-freestanding", "" },
1043 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1044 { "-fno-cond-mismatch", "" },
1045 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1046 { "-fno-dollars-in-identifiers", "" },
1047 { "-fpreprocessed", "" },
1048 { "-fno-preprocessed", "" },
1049 { "-fshort-double", "Use the same size for double as for float" },
1050 { "-fno-short-double", "" },
1051 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1052 { "-fno-short-enums", "" },
1053 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1054 { "-fno-short-wchar", "" },
1056 { "-Wall", "Enable most warning messages" },
1057 { "-Wbad-function-cast",
1058 "Warn about casting functions to incompatible types" },
1059 { "-Wno-bad-function-cast", "" },
1060 { "-Wmissing-noreturn",
1061 "Warn about functions which might be candidates for attribute noreturn" },
1062 { "-Wno-missing-noreturn", "" },
1063 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1064 { "-Wno-cast-qual", "" },
1065 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1066 { "-Wno-char-subscripts", "" },
1067 { "-Wcomment", "Warn if nested comments are detected" },
1068 { "-Wno-comment", "" },
1069 { "-Wcomments", "Warn if nested comments are detected" },
1070 { "-Wno-comments", "" },
1071 { "-Wconversion", "Warn about possibly confusing type conversions" },
1072 { "-Wno-conversion", "" },
1073 { "-Wformat", "Warn about printf format anomalies" },
1074 { "-Wno-format", "" },
1075 { "-Wimplicit-function-declaration",
1076 "Warn about implicit function declarations" },
1077 { "-Wno-implicit-function-declaration", "" },
1078 { "-Werror-implicit-function-declaration", "" },
1079 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1080 { "-Wno-implicit-int", "" },
1081 { "-Wimplicit", "" },
1082 { "-Wno-implicit", "" },
1083 { "-Wimport", "Warn about the use of the #import directive" },
1084 { "-Wno-import", "" },
1085 { "-Wlong-long","" },
1086 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1087 { "-Wmain", "Warn about suspicious declarations of main" },
1088 { "-Wno-main", "" },
1089 { "-Wmissing-braces",
1090 "Warn about possibly missing braces around initialisers" },
1091 { "-Wno-missing-braces", "" },
1092 { "-Wmissing-declarations",
1093 "Warn about global funcs without previous declarations"},
1094 { "-Wno-missing-declarations", "" },
1095 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1096 { "-Wno-missing-prototypes", "" },
1097 { "-Wmultichar", "Warn about use of multicharacter literals"},
1098 { "-Wno-multichar", "" },
1099 { "-Wnested-externs", "Warn about externs not at file scope level" },
1100 { "-Wno-nested-externs", "" },
1101 { "-Wparentheses", "Warn about possible missing parentheses" },
1102 { "-Wno-parentheses", "" },
1103 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1104 { "-Wno-pointer-arith", "" },
1105 { "-Wredundant-decls",
1106 "Warn about multiple declarations of the same object" },
1107 { "-Wno-redundant-decls", "" },
1108 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1109 { "-Wno-sign-compare", "" },
1110 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1111 { "-Wno-float-equal", "" },
1112 { "-Wunknown-pragmas", "Warn about unrecognised pragmas" },
1113 { "-Wno-unknown-pragmas", "" },
1114 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1115 { "-Wno-strict-prototypes", "" },
1116 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1117 { "-Wno-traditional", "" },
1118 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1119 { "-Wno-trigraphs", "" },
1121 { "-Wno-undef", "" },
1122 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1123 { "-Wno-write-strings", "" },
1125 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1127 /* These are for Objective C. */
1128 DEFINE_LANG_NAME ("Objective C")
1130 { "-lang-objc", "" },
1131 { "-gen-decls", "Dump decls to a .decl file" },
1132 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1133 { "-fno-gnu-runtime", "" },
1134 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1135 { "-fno-next-runtime", "" },
1136 { "-Wselector", "Warn if a selector has multiple methods" },
1137 { "-Wno-selector", "" },
1138 { "-Wprotocol", "" },
1139 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1140 { "-print-objc-runtime-info",
1141 "Generate C header of platform specific features" },
1143 #include "options.h"
1147 /* Here is a table, controlled by the tm.h file, listing each -m switch
1148 and which bits in `target_switches' it should set or clear.
1149 If VALUE is positive, it is bits to set.
1150 If VALUE is negative, -VALUE is bits to clear.
1151 (The sign bit is not used so there is no confusion.) */
1157 const char * description;
1159 target_switches [] = TARGET_SWITCHES;
1161 /* This table is similar, but allows the switch to have a value. */
1163 #ifdef TARGET_OPTIONS
1166 const char * prefix;
1167 const char ** variable;
1168 const char * description;
1170 target_options [] = TARGET_OPTIONS;
1173 /* Options controlling warnings */
1175 /* Don't print warning messages. -w. */
1177 int inhibit_warnings = 0;
1179 /* Print various extra warnings. -W. */
1181 int extra_warnings = 0;
1183 /* Treat warnings as errors. -Werror. */
1185 int warnings_are_errors = 0;
1187 /* Nonzero to warn about unused local variables. */
1191 /* Nonzero to warn about code which is never reached. */
1193 int warn_notreached;
1195 /* Nonzero to warn about variables used before they are initialized. */
1197 int warn_uninitialized;
1199 /* Nonzero means warn about all declarations which shadow others. */
1203 /* Warn if a switch on an enum fails to have a case for every enum value. */
1207 /* Nonzero means warn about function definitions that default the return type
1208 or that use a null return and have a return-type other than void. */
1210 int warn_return_type;
1212 /* Nonzero means warn about pointer casts that increase the required
1213 alignment of the target type (and might therefore lead to a crash
1214 due to a misaligned access). */
1216 int warn_cast_align;
1218 /* Nonzero means warn about any identifiers that match in the first N
1219 characters. The value N is in `id_clash_len'. */
1222 unsigned id_clash_len;
1224 /* Nonzero means warn about any objects definitions whose size is larger
1225 than N bytes. Also want about function definitions whose returned
1226 values are larger than N bytes. The value N is in `larger_than_size'. */
1228 int warn_larger_than;
1229 unsigned larger_than_size;
1231 /* Nonzero means warn if inline function is too large. */
1235 /* Warn if a function returns an aggregate,
1236 since there are often incompatible calling conventions for doing this. */
1238 int warn_aggregate_return;
1240 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1244 /* Warn when gcc pads a structure to an alignment boundary. */
1248 /* Likewise for -W. */
1250 lang_independent_options W_options[] =
1252 {"unused", &warn_unused, 1, "Warn when a variable is unused" },
1253 {"error", &warnings_are_errors, 1, ""},
1254 {"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
1255 {"switch", &warn_switch, 1,
1256 "Warn about enumerated switches missing a specific case" },
1257 {"aggregate-return", &warn_aggregate_return, 1,
1258 "Warn about returning structures, unions or arrays" },
1259 {"cast-align", &warn_cast_align, 1,
1260 "Warn about pointer casts which increase alignment" },
1261 {"unreachable-code", &warn_notreached, 1,
1262 "Warn about code that will never be executed" },
1263 {"uninitialized", &warn_uninitialized, 1,
1264 "Warn about unitialized automatic variables"},
1265 {"inline", &warn_inline, 1,
1266 "Warn when an inlined function cannot be inlined"},
1267 {"packed", &warn_packed, 1,
1268 "Warn when the packed attribute has no effect on struct layout"},
1269 {"padded", &warn_padded, 1,
1270 "Warn when padding is required to align struct members"}
1273 /* Output files for assembler code (real compiler output)
1274 and debugging dumps. */
1277 FILE *aux_info_file;
1278 FILE *rtl_dump_file = NULL;
1280 /* Decode the string P as an integral parameter.
1281 If the string is indeed an integer return its numeric value else
1282 issue an Invalid Option error for the option PNAME and return DEFVAL.
1283 If PNAME is zero just return DEFVAL, do not call error. */
1286 read_integral_parameter (p, pname, defval)
1291 const char *endp = p;
1295 if (*endp >= '0' && *endp <= '9')
1304 error ("Invalid option `%s'", pname);
1312 /* Time accumulators, to count the total time spent in various passes. */
1316 int integration_time;
1322 int branch_prob_time;
1327 int local_alloc_time;
1328 int global_alloc_time;
1333 int shorten_branch_time;
1341 /* Return time used so far, in microseconds. */
1351 #else /* not BeOS */
1352 #if defined (_WIN32) && !defined (__CYGWIN__)
1356 return (clock() * 1000);
1357 #else /* not _WIN32 */
1363 tick = 1000000 / sysconf(_SC_CLK_TCK);
1365 return (tms.tms_utime + tms.tms_stime) * tick;
1371 # if HAVE_SYSCONF && defined _SC_CLK_TCK
1372 # define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
1375 # define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
1377 # define TICKS_PER_SECOND HZ /* traditional UNIX */
1381 return (tms.tms_utime + tms.tms_stime) * (1000000 / TICKS_PER_SECOND);
1386 struct rusage rusage;
1387 getrusage (0, &rusage);
1388 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
1389 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
1396 int proc_system_time;
1397 int child_user_time;
1398 int child_system_time;
1400 times ((void *) &vms_times);
1401 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
1405 #endif /* _SC_CLK_TCK */
1407 #endif /* __BEOS__ */
1410 #define TIMEVAR(VAR, BODY) \
1411 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
1414 print_time (str, total)
1419 "time in %s: %d.%06d (%.0f%%)\n",
1420 str, total / 1000000, total % 1000000,
1421 (double)total / (double)all_time * 100.0);
1424 /* This is the default decl_printable_name function. */
1427 decl_name (decl, verbosity)
1429 int verbosity ATTRIBUTE_UNUSED;
1431 return IDENTIFIER_POINTER (DECL_NAME (decl));
1434 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1439 struct file_stack *stack = *(struct file_stack **)p;
1441 /* We're only called for input_file_stack, so we can mark the current
1442 input_filename here as well. */
1443 ggc_mark_string (main_input_filename);
1444 ggc_mark_string (input_filename);
1448 ggc_mark_string (stack->name);
1449 stack = stack->next;
1454 /* This calls abort and is used to avoid problems when abort if a macro.
1455 It is used when we need to pass the address of abort. */
1463 /* When `malloc.c' is compiled with `rcheck' defined,
1464 it calls this function to report clobberage. */
1468 const char * s ATTRIBUTE_UNUSED;
1473 /* Return the logarithm of X, base 2, considering X unsigned,
1474 if X is a power of 2. Otherwise, returns -1.
1476 This should be used via the `exact_log2' macro. */
1480 register unsigned HOST_WIDE_INT x;
1482 register int log = 0;
1483 /* Test for 0 or a power of 2. */
1484 if (x == 0 || x != (x & -x))
1486 while ((x >>= 1) != 0)
1491 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1492 If X is 0, return -1.
1494 This should be used via the floor_log2 macro. */
1498 register unsigned HOST_WIDE_INT x;
1500 register int log = -1;
1507 static int float_handler_set;
1509 jmp_buf float_handler;
1511 /* Signals actually come here. */
1514 float_signal (signo)
1515 /* If this is missing, some compilers complain. */
1516 int signo ATTRIBUTE_UNUSED;
1518 if (float_handled == 0)
1520 #if defined (USG) || defined (hpux)
1521 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1524 signal (SIGFPE, float_signal);
1525 longjmp (float_handler, 1);
1528 /* Specify where to longjmp to when a floating arithmetic error happens.
1529 If HANDLER is 0, it means don't handle the errors any more. */
1532 set_float_handler (handler)
1535 float_handled = (handler != 0);
1537 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1539 if (float_handled && ! float_handler_set)
1541 signal (SIGFPE, float_signal);
1542 float_handler_set = 1;
1546 /* This is a wrapper function for code which might elicit an
1547 arithmetic exception. That code should be passed in as a function
1548 pointer FN, and one argument DATA. DATA is usually a struct which
1549 contains the real input and output for function FN. This function
1550 returns 0 (failure) if longjmp was called (i.e. an exception
1551 occured.) It returns 1 (success) otherwise. */
1554 do_float_handler (fn, data)
1555 void (*fn) PARAMS ((PTR));
1562 /* We got here via longjmp() caused by an exception in function fn() */
1563 set_float_handler (NULL);
1567 set_float_handler (buf);
1569 set_float_handler (NULL);
1573 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1574 error happens, pushing the previous specification into OLD_HANDLER.
1575 Return an indication of whether there was a previous handler in effect. */
1578 push_float_handler (handler, old_handler)
1579 jmp_buf handler, old_handler;
1581 int was_handled = float_handled;
1585 memcpy ((char *) old_handler, (char *) float_handler,
1586 sizeof (float_handler));
1588 memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
1592 /* Restore the previous specification of whether and where to longjmp to
1593 when a floating arithmetic error happens. */
1596 pop_float_handler (handled, handler)
1600 float_handled = handled;
1602 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1605 /* Handler for SIGPIPE. */
1609 /* If this is missing, some compilers complain. */
1610 int signo ATTRIBUTE_UNUSED;
1612 fatal ("output pipe has been closed");
1615 /* Strip off a legitimate source ending from the input string NAME of
1616 length LEN. Rather than having to know the names used by all of
1617 our front ends, we strip off an ending of a period followed by
1618 up to five characters. (Java uses ".class".) */
1621 strip_off_ending (name, len)
1626 for (i = 2; i < 6 && len > i; i++)
1628 if (name[len - i] == '.')
1630 name[len - i] = '\0';
1636 /* Output a quoted string. */
1639 output_quoted_string (asm_file, string)
1643 #ifdef OUTPUT_QUOTED_STRING
1644 OUTPUT_QUOTED_STRING (asm_file, string);
1648 putc ('\"', asm_file);
1649 while ((c = *string++) != 0)
1651 if (c == '\"' || c == '\\')
1652 putc ('\\', asm_file);
1655 putc ('\"', asm_file);
1659 /* Output a file name in the form wanted by System V. */
1662 output_file_directive (asm_file, input_name)
1664 const char *input_name;
1666 int len = strlen (input_name);
1667 const char *na = input_name + len;
1669 /* NA gets INPUT_NAME sans directory names. */
1670 while (na > input_name)
1674 #ifdef DIR_SEPARATOR
1675 if (na[-1] == DIR_SEPARATOR)
1681 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1682 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1684 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1685 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1687 fprintf (asm_file, "\t.file\t");
1688 output_quoted_string (asm_file, na);
1689 fputc ('\n', asm_file);
1694 #ifdef ASM_IDENTIFY_LANGUAGE
1695 /* Routine to build language identifier for object file. */
1697 output_lang_identify (asm_out_file)
1700 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1701 char *s = (char *) alloca (len);
1702 sprintf (s, "__gnu_compiled_%s", lang_identify ());
1703 ASM_OUTPUT_LABEL (asm_out_file, s);
1707 /* Routine to open a dump file. */
1709 open_dump_file (suffix, function_name)
1711 const char *function_name;
1718 dumpname = concat (dump_base_name, suffix, NULL);
1720 if (rtl_dump_file != NULL)
1721 fclose (rtl_dump_file);
1723 rtl_dump_file = fopen (dumpname, "a");
1725 if (rtl_dump_file == NULL)
1726 pfatal_with_name (dumpname);
1731 fprintf (rtl_dump_file, "\n;; Function %s\n\n", function_name);
1737 /* Routine to close a dump file. */
1739 close_dump_file (func, insns)
1740 void (*func) PARAMS ((FILE *, rtx));
1747 func (rtl_dump_file, insns);
1749 fflush (rtl_dump_file);
1750 fclose (rtl_dump_file);
1752 rtl_dump_file = NULL;
1758 /* Routine to dump rtl into a file. */
1760 dump_rtl (suffix, decl, func, insns)
1763 void (*func) PARAMS ((FILE *, rtx));
1766 open_dump_file (suffix, decl_printable_name (decl, 2));
1767 close_dump_file (func, insns);
1770 /* Routine to empty a dump file. */
1772 clean_dump_file (suffix)
1775 char * const dumpname = concat (dump_base_name, suffix, NULL);
1777 rtl_dump_file = fopen (dumpname, "w");
1779 if (rtl_dump_file == NULL)
1780 pfatal_with_name (dumpname);
1784 fclose (rtl_dump_file);
1785 rtl_dump_file = NULL;
1790 /* Do any final processing required for the declarations in VEC, of
1791 which there are LEN. We write out inline functions and variables
1792 that have been deferred until this point, but which are required.
1793 Returns non-zero if anything was put out. */
1795 wrapup_global_declarations (vec, len)
1802 int output_something = 0;
1804 for (i = 0; i < len; i++)
1808 /* We're not deferring this any longer. */
1809 DECL_DEFER_OUTPUT (decl) = 0;
1811 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1812 && incomplete_decl_finalize_hook != 0)
1813 (*incomplete_decl_finalize_hook) (decl);
1816 /* Now emit any global variables or functions that we have been
1817 putting off. We need to loop in case one of the things emitted
1818 here references another one which comes earlier in the list. */
1822 for (i = 0; i < len; i++)
1826 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1829 /* Don't write out static consts, unless we still need them.
1831 We also keep static consts if not optimizing (for debugging),
1832 unless the user specified -fno-keep-static-consts.
1833 ??? They might be better written into the debug information.
1834 This is possible when using DWARF.
1836 A language processor that wants static constants to be always
1837 written out (even if it is not used) is responsible for
1838 calling rest_of_decl_compilation itself. E.g. the C front-end
1839 calls rest_of_decl_compilation from finish_decl.
1840 One motivation for this is that is conventional in some
1841 environments to write things like:
1842 static const char rcsid[] = "... version string ...";
1843 intending to force the string to be in the executable.
1845 A language processor that would prefer to have unneeded
1846 static constants "optimized away" would just defer writing
1847 them out until here. E.g. C++ does this, because static
1848 constants are often defined in header files.
1850 ??? A tempting alternative (for both C and C++) would be
1851 to force a constant to be written if and only if it is
1852 defined in a main file, as opposed to an include file. */
1854 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1855 && (! TREE_READONLY (decl)
1856 || TREE_PUBLIC (decl)
1857 || (!optimize && flag_keep_static_consts)
1858 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1861 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1864 if (TREE_CODE (decl) == FUNCTION_DECL
1865 && DECL_INITIAL (decl) != 0
1866 && DECL_SAVED_INSNS (decl) != 0
1867 && (flag_keep_inline_functions
1868 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1869 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1872 temporary_allocation ();
1873 output_inline_function (decl);
1874 permanent_allocation (1);
1879 output_something = 1;
1883 return output_something;
1886 /* Issue appropriate warnings for the global declarations in VEC (of
1887 which there are LEN). Output debugging information for them. */
1889 check_global_declarations (vec, len)
1896 for (i = 0; i < len; i++)
1900 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1901 && ! TREE_ASM_WRITTEN (decl))
1902 /* Cancel the RTL for this decl so that, if debugging info
1903 output for global variables is still to come,
1904 this one will be omitted. */
1905 DECL_RTL (decl) = NULL;
1907 /* Warn about any function
1908 declared static but not defined.
1909 We don't warn about variables,
1910 because many programs have static variables
1911 that exist only to get some text into the object file. */
1912 if (TREE_CODE (decl) == FUNCTION_DECL
1914 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1915 && DECL_INITIAL (decl) == 0
1916 && DECL_EXTERNAL (decl)
1917 && ! DECL_ARTIFICIAL (decl)
1918 && ! TREE_PUBLIC (decl))
1920 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1921 pedwarn_with_decl (decl,
1922 "`%s' used but never defined");
1924 warning_with_decl (decl,
1925 "`%s' declared `static' but never defined");
1926 /* This symbol is effectively an "extern" declaration now. */
1927 TREE_PUBLIC (decl) = 1;
1928 assemble_external (decl);
1931 /* Warn about static fns or vars defined but not used,
1932 but not about inline functions or static consts
1933 since defining those in header files is normal practice. */
1935 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
1936 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
1937 && ! DECL_IN_SYSTEM_HEADER (decl)
1938 && ! DECL_EXTERNAL (decl)
1939 && ! TREE_PUBLIC (decl)
1940 && ! TREE_USED (decl)
1941 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
1942 /* The TREE_USED bit for file-scope decls
1943 is kept in the identifier, to handle multiple
1944 external decls in different scopes. */
1945 && ! TREE_USED (DECL_NAME (decl)))
1946 warning_with_decl (decl, "`%s' defined but not used");
1948 #ifdef SDB_DEBUGGING_INFO
1949 /* The COFF linker can move initialized global vars to the end.
1950 And that can screw up the symbol ordering.
1951 By putting the symbols in that order to begin with,
1952 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1953 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1954 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1955 && ! DECL_EXTERNAL (decl)
1956 && DECL_RTL (decl) != 0)
1957 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
1959 /* Output COFF information for non-global
1960 file-scope initialized variables. */
1961 if (write_symbols == SDB_DEBUG
1962 && TREE_CODE (decl) == VAR_DECL
1963 && DECL_INITIAL (decl)
1964 && ! DECL_EXTERNAL (decl)
1965 && DECL_RTL (decl) != 0
1966 && GET_CODE (DECL_RTL (decl)) == MEM)
1967 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
1968 #endif /* SDB_DEBUGGING_INFO */
1969 #ifdef DWARF_DEBUGGING_INFO
1970 /* Output DWARF information for file-scope tentative data object
1971 declarations, file-scope (extern) function declarations (which
1972 had no corresponding body) and file-scope tagged type declarations
1973 and definitions which have not yet been forced out. */
1975 if (write_symbols == DWARF_DEBUG
1976 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1977 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
1979 #ifdef DWARF2_DEBUGGING_INFO
1980 /* Output DWARF2 information for file-scope tentative data object
1981 declarations, file-scope (extern) function declarations (which
1982 had no corresponding body) and file-scope tagged type declarations
1983 and definitions which have not yet been forced out. */
1985 if (write_symbols == DWARF2_DEBUG
1986 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1987 TIMEVAR (symout_time, dwarf2out_decl (decl));
1992 /* Compile an entire file of output from cpp, named NAME.
1993 Write a file of assembly output and various debugging dumps. */
2002 int name_specified = name != 0;
2004 if (dump_base_name == 0)
2005 dump_base_name = name ? name : "gccdump";
2009 integration_time = 0;
2015 branch_prob_time = 0;
2020 local_alloc_time = 0;
2021 global_alloc_time = 0;
2026 shorten_branch_time = 0;
2032 /* Initialize data in various passes. */
2036 name = init_parse (name);
2037 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2038 || debug_info_level == DINFO_LEVEL_VERBOSE
2039 || flag_test_coverage
2040 || warn_notreached);
2042 init_decl_processing ();
2049 init_function_once ();
2050 init_stor_layout_once ();
2051 init_varasm_once ();
2053 /* The following initialization functions need to generate rtl, so
2054 provide a dummy function context for them. */
2055 init_dummy_function_start ();
2058 if (flag_caller_saves)
2059 init_caller_save ();
2060 expand_dummy_function_end ();
2062 /* If auxiliary info generation is desired, open the output file.
2063 This goes in the same directory as the source file--unlike
2064 all the other output files. */
2065 if (flag_gen_aux_info)
2067 aux_info_file = fopen (aux_info_file_name, "w");
2068 if (aux_info_file == 0)
2069 pfatal_with_name (aux_info_file_name);
2072 /* Clear the dump files. */
2074 clean_dump_file (".00.rtl");
2077 clean_dump_file (".01.jump");
2078 if (graph_dump_format != no_graph)
2079 clean_graph_dump_file (dump_base_name, ".01.jump");
2083 clean_dump_file (".02.cse");
2084 if (graph_dump_format != no_graph)
2085 clean_graph_dump_file (dump_base_name, ".02.cse");
2089 clean_dump_file (".03.addressof");
2090 if (graph_dump_format != no_graph)
2091 clean_graph_dump_file (dump_base_name, ".03.addressof");
2095 clean_dump_file (".04.gcse");
2096 if (graph_dump_format != no_graph)
2097 clean_graph_dump_file (dump_base_name, ".04.gcse");
2101 clean_dump_file (".05.loop");
2102 if (graph_dump_format != no_graph)
2103 clean_graph_dump_file (dump_base_name, ".05.loop");
2107 clean_dump_file (".06.cse2");
2108 if (graph_dump_format != no_graph)
2109 clean_graph_dump_file (dump_base_name, ".06.cse2");
2111 if (branch_prob_dump)
2113 clean_dump_file (".07.bp");
2114 if (graph_dump_format != no_graph)
2115 clean_graph_dump_file (dump_base_name, ".07.bp");
2119 clean_dump_file (".08.flow");
2120 if (graph_dump_format != no_graph)
2121 clean_graph_dump_file (dump_base_name, ".08.flow");
2125 clean_dump_file (".09.combine");
2126 if (graph_dump_format != no_graph)
2127 clean_graph_dump_file (dump_base_name, ".09.combine");
2131 clean_dump_file (".10.regmove");
2132 if (graph_dump_format != no_graph)
2133 clean_graph_dump_file (dump_base_name, ".10.regmove");
2135 #ifdef INSN_SCHEDULING
2138 clean_dump_file (".11.sched");
2139 if (graph_dump_format != no_graph)
2140 clean_graph_dump_file (dump_base_name, ".11.sched");
2145 clean_dump_file (".12.lreg");
2146 if (graph_dump_format != no_graph)
2147 clean_graph_dump_file (dump_base_name, ".12.lreg");
2149 if (global_reg_dump)
2151 clean_dump_file (".13.greg");
2152 if (graph_dump_format != no_graph)
2153 clean_graph_dump_file (dump_base_name, ".13.greg");
2157 clean_dump_file (".14.flow2");
2158 if (graph_dump_format != no_graph)
2159 clean_graph_dump_file (dump_base_name, ".14.flow2");
2161 #ifdef HAVE_peephole2
2164 clean_dump_file (".15.peephole2");
2165 if (graph_dump_format != no_graph)
2166 clean_graph_dump_file (dump_base_name, ".15.peephole2");
2169 #ifdef INSN_SCHEDULING
2172 clean_dump_file (".16.sched2");
2173 if (graph_dump_format != no_graph)
2174 clean_graph_dump_file (dump_base_name, ".16.sched2");
2179 clean_dump_file (".17.jump2");
2180 if (graph_dump_format != no_graph)
2181 clean_graph_dump_file (dump_base_name, ".17.jump2");
2183 #ifdef MACHINE_DEPENDENT_REORG
2184 if (mach_dep_reorg_dump)
2186 clean_dump_file (".18.mach");
2187 if (graph_dump_format != no_graph)
2188 clean_graph_dump_file (dump_base_name, ".18.mach");
2194 clean_dump_file (".19.dbr");
2195 if (graph_dump_format != no_graph)
2196 clean_graph_dump_file (dump_base_name, ".19.dbr");
2202 clean_dump_file (".20.stack");
2203 if (graph_dump_format != no_graph)
2204 clean_graph_dump_file (dump_base_name, ".20.stack");
2208 /* Open assembler code output file. */
2210 if (flag_syntax_only)
2211 asm_out_file = NULL;
2214 if (! name_specified && asm_file_name == 0)
2215 asm_out_file = stdout;
2218 if (asm_file_name == 0)
2220 int len = strlen (dump_base_name);
2221 char *dumpname = (char *) xmalloc (len + 6);
2222 memcpy (dumpname, dump_base_name, len + 1);
2223 strip_off_ending (dumpname, len);
2224 strcat (dumpname, ".s");
2225 asm_file_name = dumpname;
2227 if (!strcmp (asm_file_name, "-"))
2228 asm_out_file = stdout;
2230 asm_out_file = fopen (asm_file_name, "w");
2231 if (asm_out_file == 0)
2232 pfatal_with_name (asm_file_name);
2235 #ifdef IO_BUFFER_SIZE
2236 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2237 _IOFBF, IO_BUFFER_SIZE);
2242 name = ggc_alloc_string (name, strlen (name));
2243 input_filename = name;
2245 /* Put an entry on the input file stack for the main input file. */
2247 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2248 input_file_stack->next = 0;
2249 input_file_stack->name = input_filename;
2251 /* Perform language-specific initialization.
2252 This may set main_input_filename. */
2255 /* If the input doesn't start with a #line, use the input name
2256 as the official input file name. */
2257 if (main_input_filename == 0)
2258 main_input_filename = name;
2260 if (flag_syntax_only)
2262 write_symbols = NO_DEBUG;
2264 profile_block_flag = 0;
2268 ASM_FILE_START (asm_out_file);
2270 #ifdef ASM_COMMENT_START
2271 if (flag_verbose_asm)
2273 /* Print the list of options in effect. */
2274 print_version (asm_out_file, ASM_COMMENT_START);
2275 print_switch_values (asm_out_file, 0, MAX_LINE,
2276 ASM_COMMENT_START, " ", "\n");
2277 /* Add a blank line here so it appears in assembler output but not
2279 fprintf (asm_out_file, "\n");
2283 /* Output something to inform GDB that this compilation was by GCC. */
2284 #ifndef ASM_IDENTIFY_GCC
2285 fprintf (asm_out_file, "gcc2_compiled.:\n");
2287 ASM_IDENTIFY_GCC (asm_out_file);
2290 /* Output something to identify which front-end produced this file. */
2291 #ifdef ASM_IDENTIFY_LANGUAGE
2292 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2294 } /* ! flag_syntax_only */
2296 #ifndef ASM_OUTPUT_SECTION_NAME
2297 if (flag_function_sections)
2299 warning ("-ffunction-sections not supported for this target.");
2300 flag_function_sections = 0;
2302 if (flag_data_sections)
2304 warning ("-fdata-sections not supported for this target.");
2305 flag_data_sections = 0;
2309 if (flag_function_sections
2310 && (profile_flag || profile_block_flag))
2312 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2313 flag_function_sections = 0;
2316 #ifndef OBJECT_FORMAT_ELF
2317 if (flag_function_sections && write_symbols != NO_DEBUG)
2318 warning ("-ffunction-sections may affect debugging on some targets.");
2321 /* ??? Note: There used to be a conditional here
2322 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2323 This was to guarantee separation between gcc_compiled. and
2324 the first function, for the sake of dbx on Suns.
2325 However, having the extra zero here confused the Emacs
2326 code for unexec, and might confuse other programs too.
2327 Therefore, I took out that change.
2328 In future versions we should find another way to solve
2329 that dbx problem. -- rms, 23 May 93. */
2331 /* Don't let the first function fall at the same address
2332 as gcc_compiled., if profiling. */
2333 if (profile_flag || profile_block_flag)
2335 /* It's best if we can write a nop here since some
2336 assemblers don't tolerate zeros in the text section. */
2337 output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
2340 /* If dbx symbol table desired, initialize writing it
2341 and output the predefined types. */
2342 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2343 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2344 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
2347 #ifdef SDB_DEBUGGING_INFO
2348 if (write_symbols == SDB_DEBUG)
2349 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
2352 #ifdef DWARF_DEBUGGING_INFO
2353 if (write_symbols == DWARF_DEBUG)
2354 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
2356 #ifdef DWARF2_UNWIND_INFO
2357 if (dwarf2out_do_frame ())
2358 dwarf2out_frame_init ();
2360 #ifdef DWARF2_DEBUGGING_INFO
2361 if (write_symbols == DWARF2_DEBUG)
2362 TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
2365 /* Initialize yet another pass. */
2367 init_final (main_input_filename);
2368 init_branch_prob (dump_base_name);
2370 start_time = get_run_time ();
2372 /* Call the parser, which parses the entire file
2373 (calling rest_of_compilation for each function). */
2375 if (yyparse () != 0)
2377 if (errorcount == 0)
2378 fnotice (stderr, "Errors detected in input file (your bison.simple is out of date)\n");
2380 /* In case there were missing closebraces,
2381 get us back to the global binding level. */
2382 while (! global_bindings_p ())
2386 /* Compilation is now finished except for writing
2387 what's left of the symbol table output. */
2389 parse_time += get_run_time () - start_time;
2391 parse_time -= integration_time;
2392 parse_time -= varconst_time;
2394 if (flag_syntax_only)
2397 globals = getdecls ();
2399 /* Really define vars that have had only a tentative definition.
2400 Really output inline functions that must actually be callable
2401 and have not been output so far. */
2404 int len = list_length (globals);
2405 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2409 /* Process the decls in reverse order--earliest first.
2410 Put them into VEC from back to front, then take out from front. */
2412 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2413 vec[len - i - 1] = decl;
2415 wrapup_global_declarations (vec, len);
2417 /* This must occur after the loop to output deferred functions. Else
2418 the profiler initializer would not be emitted if all the functions
2419 in this compilation unit were deferred.
2421 output_func_start_profiler can not cause any additional functions or
2422 data to need to be output, so it need not be in the deferred function
2424 output_func_start_profiler ();
2426 /* Now that all possible functions have been output, we can dump
2427 the exception table. */
2429 output_exception_table ();
2431 check_global_declarations (vec, len);
2437 /* Write out any pending weak symbol declarations. */
2441 /* Do dbx symbols */
2442 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2443 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2444 TIMEVAR (symout_time,
2446 dbxout_finish (asm_out_file, main_input_filename);
2450 #ifdef DWARF_DEBUGGING_INFO
2451 if (write_symbols == DWARF_DEBUG)
2452 TIMEVAR (symout_time,
2458 #ifdef DWARF2_UNWIND_INFO
2459 if (dwarf2out_do_frame ())
2460 dwarf2out_frame_finish ();
2463 #ifdef DWARF2_DEBUGGING_INFO
2464 if (write_symbols == DWARF2_DEBUG)
2465 TIMEVAR (symout_time,
2467 dwarf2out_finish ();
2471 /* Output some stuff at end of file if nec. */
2473 end_final (dump_base_name);
2475 if (branch_prob_dump)
2476 open_dump_file (".07.bp", NULL);
2478 TIMEVAR (dump_time, end_branch_prob (rtl_dump_file));
2480 if (branch_prob_dump)
2481 close_dump_file (NULL, NULL_RTX);
2484 ASM_FILE_END (asm_out_file);
2488 /* Language-specific end of compilation actions. */
2492 /* Close the dump files. */
2494 if (flag_gen_aux_info)
2496 fclose (aux_info_file);
2498 unlink (aux_info_file_name);
2503 open_dump_file (".09.combine", NULL);
2504 TIMEVAR (dump_time, dump_combine_total_stats (rtl_dump_file));
2505 close_dump_file (NULL, NULL_RTX);
2508 /* Close non-debugging input and output files. Take special care to note
2509 whether fclose returns an error, since the pages might still be on the
2510 buffer chain while the file is open. */
2514 if (! flag_syntax_only
2515 && (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0))
2516 fatal_io_error (asm_file_name);
2518 /* Do whatever is necessary to finish printing the graphs. */
2519 if (graph_dump_format != no_graph)
2522 finish_graph_dump_file (dump_base_name, ".01.jump");
2524 finish_graph_dump_file (dump_base_name, ".02.cse");
2526 finish_graph_dump_file (dump_base_name, ".03.addressof");
2528 finish_graph_dump_file (dump_base_name, ".04.gcse");
2530 finish_graph_dump_file (dump_base_name, ".05.loop");
2532 finish_graph_dump_file (dump_base_name, ".06.cse2");
2533 if (branch_prob_dump)
2534 finish_graph_dump_file (dump_base_name, ".07.bp");
2536 finish_graph_dump_file (dump_base_name, ".08.flow");
2538 finish_graph_dump_file (dump_base_name, ".09.combine");
2540 finish_graph_dump_file (dump_base_name, ".10.regmove");
2541 #ifdef INSN_SCHEDULING
2543 finish_graph_dump_file (dump_base_name, ".11.sched");
2546 finish_graph_dump_file (dump_base_name, ".12.lreg");
2547 if (global_reg_dump)
2548 finish_graph_dump_file (dump_base_name, ".13.greg");
2550 finish_graph_dump_file (dump_base_name, ".14.flow2");
2551 #ifdef HAVE_peephole2
2553 finish_graph_dump_file (dump_base_name, ".15.peephole2");
2555 #ifdef INSN_SCHEDULING
2557 finish_graph_dump_file (dump_base_name, ".16.sched2");
2560 finish_graph_dump_file (dump_base_name, ".17.jump2");
2561 #ifdef MACHINE_DEPENDENT_REORG
2562 if (mach_dep_reorg_dump)
2563 finish_graph_dump_file (dump_base_name, ".18.mach");
2567 finish_graph_dump_file (dump_base_name, ".19.dbr");
2571 finish_graph_dump_file (dump_base_name, ".20.stack");
2575 /* Free up memory for the benefit of leak detectors. */
2578 /* Print the times. */
2582 all_time = get_run_time ();
2584 fprintf (stderr,"\n");
2586 print_time ("parse", parse_time);
2587 print_time ("integration", integration_time);
2588 print_time ("jump", jump_time);
2589 print_time ("cse", cse_time);
2590 print_time ("gcse", gcse_time);
2591 print_time ("loop", loop_time);
2592 print_time ("cse2", cse2_time);
2593 print_time ("branch-prob", branch_prob_time);
2594 print_time ("flow", flow_time);
2595 print_time ("combine", combine_time);
2596 print_time ("regmove", regmove_time);
2597 #ifdef INSN_SCHEDULING
2598 print_time ("sched", sched_time);
2600 print_time ("local-alloc", local_alloc_time);
2601 print_time ("global-alloc", global_alloc_time);
2602 print_time ("flow2", flow2_time);
2603 #ifdef HAVE_peephole2
2604 print_time ("peephole2", peephole2_time);
2606 #ifdef INSN_SCHEDULING
2607 print_time ("sched2", sched2_time);
2610 print_time ("dbranch", dbr_sched_time);
2612 print_time ("shorten-branch", shorten_branch_time);
2614 print_time ("stack-reg", stack_reg_time);
2616 print_time ("final", final_time);
2617 print_time ("varconst", varconst_time);
2618 print_time ("symout", symout_time);
2619 print_time ("dump", dump_time);
2621 print_time ("gc", gc_time);
2625 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2626 and TYPE_DECL nodes.
2628 This does nothing for local (non-static) variables, unless the
2629 variable is a register variable with an ASMSPEC. In that case, or
2630 if the variable is not an automatice, it sets up the RTL and
2631 outputs any assembler code (label definition, storage allocation
2632 and initialization).
2634 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2635 the assembler symbol name to be used. TOP_LEVEL is nonzero
2636 if this declaration is not within a function. */
2639 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2641 const char *asmspec;
2645 /* Declarations of variables, and of functions defined elsewhere. */
2647 /* The most obvious approach, to put an #ifndef around where
2648 this macro is used, doesn't work since it's inside a macro call. */
2649 #ifndef ASM_FINISH_DECLARE_OBJECT
2650 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2653 /* Forward declarations for nested functions are not "external",
2654 but we need to treat them as if they were. */
2655 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2656 || TREE_CODE (decl) == FUNCTION_DECL)
2657 TIMEVAR (varconst_time,
2659 make_decl_rtl (decl, asmspec, top_level);
2660 /* Initialized extern variable exists to be replaced
2661 with its value, or represents something that will be
2662 output in another file. */
2663 if (! (TREE_CODE (decl) == VAR_DECL
2664 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2665 && DECL_INITIAL (decl) != 0
2666 && DECL_INITIAL (decl) != error_mark_node))
2667 /* Don't output anything
2668 when a tentative file-scope definition is seen.
2669 But at end of compilation, do output code for them. */
2670 if (! (! at_end && top_level
2671 && (DECL_INITIAL (decl) == 0
2672 || DECL_INITIAL (decl) == error_mark_node)))
2673 assemble_variable (decl, top_level, at_end, 0);
2674 if (decl == last_assemble_variable_decl)
2676 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2680 else if (DECL_REGISTER (decl) && asmspec != 0)
2682 if (decode_reg_name (asmspec) >= 0)
2684 DECL_RTL (decl) = 0;
2685 make_decl_rtl (decl, asmspec, top_level);
2688 error ("invalid register name `%s' for register variable", asmspec);
2690 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2691 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2692 && TREE_CODE (decl) == TYPE_DECL)
2693 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2695 #ifdef SDB_DEBUGGING_INFO
2696 else if (write_symbols == SDB_DEBUG && top_level
2697 && TREE_CODE (decl) == TYPE_DECL)
2698 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2702 /* Called after finishing a record, union or enumeral type. */
2705 rest_of_type_compilation (type, toplev)
2706 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2710 tree type ATTRIBUTE_UNUSED;
2711 int toplev ATTRIBUTE_UNUSED;
2714 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2715 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2716 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2718 #ifdef SDB_DEBUGGING_INFO
2719 if (write_symbols == SDB_DEBUG)
2720 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2724 /* DECL is an inline function, whose body is present, but which is not
2725 being output at this point. (We're putting that off until we need
2726 to do it.) If there are any actions that need to take place,
2727 including the emission of debugging information for the function,
2728 this is where they should go. This function may be called by
2729 language-dependent code for front-ends that do not even generate
2730 RTL for functions that don't need to be put out. */
2733 note_deferral_of_defined_inline_function (decl)
2734 tree decl ATTRIBUTE_UNUSED;
2736 #ifdef DWARF_DEBUGGING_INFO
2737 /* Generate the DWARF info for the "abstract" instance of a function
2738 which we may later generate inlined and/or out-of-line instances
2740 if (write_symbols == DWARF_DEBUG)
2742 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2743 DWARF code expects it to be set in this case. Intuitively,
2744 DECL is the function we just finished defining, so setting
2745 CURRENT_FUNCTION_DECL is sensible. */
2746 tree saved_cfd = current_function_decl;
2747 current_function_decl = decl;
2749 /* Let the DWARF code do its work. */
2750 set_decl_abstract_flags (decl, 1);
2751 dwarfout_file_scope_decl (decl, 0);
2752 set_decl_abstract_flags (decl, 0);
2754 /* Reset CURRENT_FUNCTION_DECL. */
2755 current_function_decl = saved_cfd;
2760 /* This is called from finish_function (within yyparse)
2761 after each top-level definition is parsed.
2762 It is supposed to compile that function or variable
2763 and output the assembler code for it.
2764 After we return, the tree storage is freed. */
2767 rest_of_compilation (decl)
2771 int start_time = get_run_time ();
2774 int rebuild_label_notes_after_reload;
2776 /* When processing delayed functions, prepare_function_start() won't
2777 have been run to re-initialize it. */
2778 cse_not_expected = ! optimize;
2780 /* First, remove any notes we don't need. That will make iterating
2781 over the instruction sequence faster, and allow the garbage
2782 collector to reclaim the memory used by the notes. */
2783 remove_unncessary_notes ();
2785 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2786 tree in sensible shape. So, we just recalculate it here. */
2787 if (cfun->x_whole_function_mode_p)
2789 find_loop_tree_blocks ();
2790 unroll_block_trees ();
2793 /* If we are reconsidering an inline function
2794 at the end of compilation, skip the stuff for making it inline. */
2796 if (DECL_SAVED_INSNS (decl) == 0)
2802 /* If this is nested inside an inlined external function, pretend
2803 it was only declared. Since we cannot inline such functions,
2804 generating code for this one is not only not necessary but will
2805 confuse some debugging output writers. */
2806 for (parent = DECL_CONTEXT (current_function_decl);
2807 parent != NULL_TREE;
2808 parent = get_containing_scope (parent))
2809 if (TREE_CODE (parent) == FUNCTION_DECL
2810 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2812 DECL_INITIAL (decl) = 0;
2813 goto exit_rest_of_compilation;
2816 /* If requested, consider whether to make this function inline. */
2817 if (DECL_INLINE (decl) || flag_inline_functions)
2818 TIMEVAR (integration_time,
2820 lose = function_cannot_inline_p (decl);
2821 if (lose || ! optimize)
2823 if (warn_inline && DECL_INLINE (decl))
2824 warning_with_decl (decl, lose);
2825 DECL_ABSTRACT_ORIGIN (decl) = 0;
2826 /* Don't really compile an extern inline function.
2827 If we can't make it inline, pretend
2828 it was only declared. */
2829 if (DECL_EXTERNAL (decl))
2831 DECL_INITIAL (decl) = 0;
2832 goto exit_rest_of_compilation;
2836 /* ??? Note that this has the effect of making it look
2837 like "inline" was specified for a function if we choose
2838 to inline it. This isn't quite right, but it's
2839 probably not worth the trouble to fix. */
2840 inlinable = DECL_INLINE (decl) = 1;
2843 insns = get_insns ();
2845 /* Dump the rtl code if we are dumping rtl. */
2849 open_dump_file (".00.rtl", decl_printable_name (decl, 2));
2851 if (DECL_SAVED_INSNS (decl))
2852 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2854 close_dump_file (print_rtl, insns);
2857 /* If function is inline, and we don't yet know whether to
2858 compile it by itself, defer decision till end of compilation.
2859 finish_compilation will call rest_of_compilation again
2860 for those functions that need to be output. Also defer those
2861 functions that we are supposed to defer. */
2864 DECL_DEFER_OUTPUT (decl) = 1;
2866 if (DECL_DEFER_OUTPUT (decl)
2867 || (DECL_INLINE (decl)
2868 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2869 && ! flag_keep_inline_functions)
2870 || DECL_EXTERNAL (decl))))
2872 DECL_DEFER_OUTPUT (decl) = 1;
2874 /* If -Wreturn-type, we have to do a bit of compilation.
2875 However, if we just fall through we will call
2876 save_for_inline_copying() which results in excessive
2877 memory use. Instead, we just want to call
2878 jump_optimize() to figure out whether or not we can fall
2879 off the end of the function; we do the minimum amount of
2880 work necessary to make that safe. And, we set optimize
2881 to zero to keep jump_optimize from working too hard. */
2882 if (warn_return_type)
2884 int saved_optimize = optimize;
2886 find_exception_handler_labels ();
2887 jump_optimize (get_insns(), !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2888 !JUMP_AFTER_REGSCAN);
2889 optimize = saved_optimize;
2892 note_deferral_of_defined_inline_function (decl);
2893 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2894 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2895 goto exit_rest_of_compilation;
2898 /* If specified extern inline but we aren't inlining it, we are
2899 done. This goes for anything that gets here with DECL_EXTERNAL
2900 set, not just things with DECL_INLINE. */
2901 if (DECL_EXTERNAL (decl))
2902 goto exit_rest_of_compilation;
2905 /* Initialize some variables used by the optimizers. */
2906 init_function_for_compilation ();
2908 if (! DECL_DEFER_OUTPUT (decl))
2909 TREE_ASM_WRITTEN (decl) = 1;
2911 /* Now that integrate will no longer see our rtl, we need not distinguish
2912 between the return value of this function and the return value of called
2914 rtx_equal_function_value_matters = 0;
2916 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2917 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2919 goto exit_rest_of_compilation;
2922 /* Emit code to get eh context, if needed. */
2926 /* If we are doing position-independent code generation, now
2927 is the time to output special prologues and epilogues.
2928 We do not want to do this earlier, because it just clutters
2929 up inline functions with meaningless insns. */
2934 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2935 Note that that may have been done above, in save_for_inline_copying.
2936 The call to resume_temporary_allocation near the end of this function
2937 goes back to the usual state of affairs. This must be done after
2938 we've built up any unwinders for exception handling, and done
2939 the FINALIZE_PIC work, if necessary. */
2941 rtl_in_current_obstack ();
2943 insns = get_insns ();
2945 /* Copy any shared structure that should not be shared. */
2947 unshare_all_rtl (current_function_decl, insns);
2949 init_EXPR_INSN_LIST_cache ();
2951 #ifdef SETJMP_VIA_SAVE_AREA
2952 /* This must be performed before virutal register instantiation. */
2953 if (current_function_calls_alloca)
2954 optimize_save_area_alloca (insns);
2957 /* Instantiate all virtual registers. */
2959 instantiate_virtual_regs (current_function_decl, get_insns ());
2961 /* See if we have allocated stack slots that are not directly addressable.
2962 If so, scan all the insns and create explicit address computation
2963 for all references to such slots. */
2964 /* fixup_stack_slots (); */
2966 /* Find all the EH handlers. */
2967 find_exception_handler_labels ();
2970 open_dump_file (".01.jump", decl_printable_name (decl, 2));
2972 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2973 are initialized and to compute whether control can drop off the end
2975 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
2976 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2977 JUMP_AFTER_REGSCAN));
2979 /* Jump optimization, and the removal of NULL pointer checks, may
2980 have reduced the number of instructions substantially. CSE, and
2981 future passes, allocate arrays whose dimensions involve the maximum
2982 instruction UID, so if we can reduce the maximum UID we'll save big on
2984 renumber_insns (rtl_dump_file);
2986 /* Dump rtl code after jump, if we are doing that. */
2988 close_dump_file (print_rtl, insns);
2990 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2991 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
2992 goto exit_rest_of_compilation;
2994 /* Try to identify useless null pointer tests and delete them. */
2995 if (flag_delete_null_pointer_checks)
2996 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3001 /* Perform common subexpression elimination.
3002 Nonzero value from `cse_main' means that jumps were simplified
3003 and some code may now be unreachable, so do
3004 jump optimization again. */
3009 open_dump_file (".02.cse", decl_printable_name (decl, 2));
3011 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
3013 if (flag_thread_jumps)
3014 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
3016 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
3018 /* If we are not running the second CSE pass, then we are no longer
3019 expecting CSE to be run. */
3020 cse_not_expected = !flag_rerun_cse_after_loop;
3022 if (tem || optimize > 1)
3023 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3025 !JUMP_AFTER_REGSCAN));
3027 /* Run this after jump optmizations remove all the unreachable code
3028 so that unreachable code will not keep values live. */
3029 TIMEVAR (cse_time, delete_trivially_dead_insns (insns, max_reg_num ()));
3031 /* Try to identify useless null pointer tests and delete them. */
3032 if (flag_delete_null_pointer_checks)
3033 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3035 /* The second pass of jump optimization is likely to have
3036 removed a bunch more instructions. */
3037 renumber_insns (rtl_dump_file);
3039 /* Dump rtl code after cse, if we are doing that. */
3042 close_dump_file (print_rtl, insns);
3043 if (graph_dump_format != no_graph)
3044 print_rtl_graph_with_bb (dump_base_name, ".02.cse", insns);
3048 purge_addressof (insns);
3049 reg_scan (insns, max_reg_num (), 1);
3053 dump_rtl (".03.addressof", decl, print_rtl, insns);
3054 if (graph_dump_format != no_graph)
3055 print_rtl_graph_with_bb (dump_base_name, ".03.addressof", insns);
3061 /* Perform global cse. */
3063 if (optimize > 0 && flag_gcse)
3066 open_dump_file (".04.gcse", decl_printable_name (decl, 2));
3068 TIMEVAR (gcse_time, tem = gcse_main (insns, rtl_dump_file));
3070 /* If gcse altered any jumps, rerun jump optimizations to clean
3074 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3076 !JUMP_AFTER_REGSCAN));
3081 close_dump_file (print_rtl, insns);
3082 if (graph_dump_format != no_graph)
3083 print_rtl_graph_with_bb (dump_base_name, ".04.gcse", insns);
3089 /* Move constant computations out of loops. */
3094 open_dump_file (".05.loop", decl_printable_name (decl, 2));
3099 if (flag_rerun_loop_opt)
3101 /* We only want to perform unrolling once. */
3103 loop_optimize (insns, rtl_dump_file, 0, 0);
3106 /* The first call to loop_optimize makes some instructions
3107 trivially dead. We delete those instructions now in the
3108 hope that doing so will make the heuristics in loop work
3109 better and possibly speed up compilation. */
3110 delete_trivially_dead_insns (insns, max_reg_num ());
3112 /* The regscan pass is currently necessary as the alias
3113 analysis code depends on this information. */
3114 reg_scan (insns, max_reg_num (), 1);
3116 loop_optimize (insns, rtl_dump_file, flag_unroll_loops, 1);
3119 /* Dump rtl code after loop opt, if we are doing that. */
3123 close_dump_file (print_rtl, insns);
3124 if (graph_dump_format != no_graph)
3125 print_rtl_graph_with_bb (dump_base_name, ".05.loop", insns);
3132 /* ??? Well, nearly. If HAVE_conditional_arithmetic, jump_optimize
3133 has put off all if-conversion until "after CSE". If we put this
3134 off any longer we may miss out doing if-conversion entirely. */
3135 cse_not_expected = 1;
3140 open_dump_file (".06.cse2", decl_printable_name (decl, 2));
3142 if (flag_rerun_cse_after_loop)
3144 /* Running another jump optimization pass before the second
3145 cse pass sometimes simplifies the RTL enough to allow
3146 the second CSE pass to do a better job. Jump_optimize can change
3147 max_reg_num so we must rerun reg_scan afterwards.
3148 ??? Rework to not call reg_scan so often. */
3149 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3150 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3152 JUMP_AFTER_REGSCAN));
3154 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3155 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3158 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3160 !JUMP_AFTER_REGSCAN));
3163 if (flag_thread_jumps)
3165 /* This pass of jump threading straightens out code
3166 that was kinked by loop optimization. */
3167 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3168 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3171 /* Dump rtl code after cse, if we are doing that. */
3174 close_dump_file (print_rtl, insns);
3175 if (graph_dump_format != no_graph)
3176 print_rtl_graph_with_bb (dump_base_name, ".06.cse2", insns);
3183 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3185 if (branch_prob_dump)
3186 open_dump_file (".07.bp", decl_printable_name (decl, 2));
3191 branch_prob (insns, rtl_dump_file);
3194 if (branch_prob_dump)
3196 close_dump_file (print_rtl, insns);
3197 if (graph_dump_format != no_graph)
3198 print_rtl_graph_with_bb (dump_base_name, ".07.bp", insns);
3207 /* Print function header into flow dump now
3208 because doing the flow analysis makes some of the dump. */
3211 open_dump_file (".08.flow", decl_printable_name (decl, 2));
3213 /* Do control and data flow analysis; wrote some of the results to
3219 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3220 cleanup_cfg (insns);
3222 calculate_loop_depth (rtl_dump_file);
3223 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3226 if (warn_uninitialized || extra_warnings)
3228 uninitialized_vars_warning (DECL_INITIAL (decl));
3230 setjmp_args_warning ();
3233 /* Dump rtl after flow analysis. */
3237 close_dump_file (print_rtl_with_bb, insns);
3238 if (graph_dump_format != no_graph)
3239 print_rtl_graph_with_bb (dump_base_name, ".08.flow", insns);
3245 /* The first life analysis pass has finished. From now on we can not
3246 generate any new pseudos. */
3249 /* If -opt, try combining insns through substitution. */
3253 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
3255 /* Dump rtl code after insn combination. */
3259 dump_rtl (".09.combine", decl, print_rtl_with_bb, insns);
3260 if (graph_dump_format != no_graph)
3261 print_rtl_graph_with_bb (dump_base_name, ".09.combine", insns);
3268 /* Register allocation pre-pass, to reduce number of moves
3269 necessary for two-address machines. */
3270 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3273 open_dump_file (".10.regmove", decl_printable_name (decl, 2));
3275 TIMEVAR (regmove_time, regmove_optimize (insns, max_reg_num (),
3280 close_dump_file (print_rtl_with_bb, insns);
3281 if (graph_dump_format != no_graph)
3282 print_rtl_graph_with_bb (dump_base_name, ".10.regmove", insns);
3289 /* Print function header into sched dump now
3290 because doing the sched analysis makes some of the dump. */
3292 #ifdef INSN_SCHEDULING
3293 if (optimize > 0 && flag_schedule_insns)
3296 open_dump_file (".11.sched", decl_printable_name (decl, 2));
3298 /* Do control and data sched analysis,
3299 and write some of the results to dump file. */
3301 TIMEVAR (sched_time, schedule_insns (rtl_dump_file));
3303 /* Dump rtl after instruction scheduling. */
3307 close_dump_file (print_rtl_with_bb, insns);
3308 if (graph_dump_format != no_graph)
3309 print_rtl_graph_with_bb (dump_base_name, ".11.sched", insns);
3317 /* Determine if the current function is a leaf before running reload
3318 since this can impact optimizations done by the prologue and
3319 epilogue thus changing register elimination offsets. */
3320 current_function_is_leaf = leaf_function_p ();
3323 open_dump_file (".12.lreg", decl_printable_name (decl, 2));
3325 /* Allocate pseudo-regs that are used only within 1 basic block.
3327 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3328 jump optimizer after register allocation and reloading are finished. */
3330 TIMEVAR (local_alloc_time,
3332 /* We recomputed reg usage as part of updating the rest
3333 of life info during sched. */
3334 if (! flag_schedule_insns)
3335 recompute_reg_usage (insns, ! optimize_size);
3336 regclass (insns, max_reg_num (), rtl_dump_file);
3337 rebuild_label_notes_after_reload = local_alloc ();
3340 /* Dump rtl code after allocating regs within basic blocks. */
3344 TIMEVAR (dump_time, dump_flow_info (rtl_dump_file));
3345 TIMEVAR (dump_time, dump_local_alloc (rtl_dump_file));
3347 close_dump_file (print_rtl_with_bb, insns);
3348 if (graph_dump_format != no_graph)
3349 print_rtl_graph_with_bb (dump_base_name, ".12.lreg", insns);
3355 if (global_reg_dump)
3356 open_dump_file (".13.greg", decl_printable_name (decl, 2));
3358 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3359 pass fixing up any insns that are invalid. */
3361 TIMEVAR (global_alloc_time,
3364 failure = global_alloc (rtl_dump_file);
3367 build_insn_chain (insns);
3368 failure = reload (insns, 0, rtl_dump_file);
3373 goto exit_rest_of_compilation;
3378 /* Do a very simple CSE pass over just the hard registers. */
3380 reload_cse_regs (insns);
3382 /* Register allocation and reloading may have turned an indirect jump into
3383 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3384 jumping instructions. */
3385 if (rebuild_label_notes_after_reload)
3386 TIMEVAR (jump_time, rebuild_jump_labels (insns));
3388 /* If optimizing and we are performing instruction scheduling after
3389 reload, then go ahead and split insns now since we are about to
3390 recompute flow information anyway.
3392 reload_cse_regs may expose more splitting opportunities, expecially
3393 for double-word operations. */
3394 if (optimize > 0 && flag_schedule_insns_after_reload)
3395 split_all_insns (0);
3397 if (global_reg_dump)
3399 TIMEVAR (dump_time, dump_global_regs (rtl_dump_file));
3400 close_dump_file (print_rtl_with_bb, insns);
3401 if (graph_dump_format != no_graph)
3402 print_rtl_graph_with_bb (dump_base_name, ".13.greg", insns);
3405 /* Re-create the death notes which were deleted during reload. */
3407 open_dump_file (".14.flow2", decl_printable_name (decl, 2));
3409 TIMEVAR (flow2_time,
3411 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3414 /* On some machines, the prologue and epilogue code, or parts thereof,
3415 can be represented as RTL. Doing so lets us schedule insns between
3416 it and the rest of the code and also allows delayed branch
3417 scheduling to operate in the epilogue. */
3418 thread_prologue_and_epilogue_insns (insns);
3425 cleanup_cfg (insns);
3426 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3433 flow2_completed = 1;
3437 close_dump_file (print_rtl_with_bb, insns);
3438 if (graph_dump_format != no_graph)
3439 print_rtl_graph_with_bb (dump_base_name, ".14.flow2", insns);
3442 #ifdef HAVE_peephole2
3443 if (optimize > 0 && flag_peephole2)
3446 open_dump_file (".15.peephole2", decl_printable_name (decl, 2));
3448 TIMEVAR (peephole2_time, peephole2_optimize (rtl_dump_file));
3452 close_dump_file (print_rtl_with_bb, insns);
3453 if (graph_dump_format != no_graph)
3454 print_rtl_graph_with_bb (dump_base_name, ".15.peephole2", insns);
3459 #ifdef INSN_SCHEDULING
3460 if (optimize > 0 && flag_schedule_insns_after_reload)
3463 open_dump_file (".16.sched2", decl_printable_name (decl, 2));
3465 /* Do control and data sched analysis again,
3466 and write some more of the results to dump file. */
3468 TIMEVAR (sched2_time, schedule_insns (rtl_dump_file));
3470 /* Dump rtl after post-reorder instruction scheduling. */
3474 close_dump_file (print_rtl_with_bb, insns);
3475 if (graph_dump_format != no_graph)
3476 print_rtl_graph_with_bb (dump_base_name, ".16.sched2", insns);
3484 #ifdef LEAF_REGISTERS
3485 current_function_uses_only_leaf_regs
3486 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3489 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3490 Also do cross-jumping this time and delete no-op move insns. */
3494 TIMEVAR (jump_time, jump_optimize (insns, JUMP_CROSS_JUMP,
3496 !JUMP_AFTER_REGSCAN));
3498 /* Dump rtl code after jump, if we are doing that. */
3502 dump_rtl (".17.jump2", decl, print_rtl_with_bb, insns);
3503 if (graph_dump_format != no_graph)
3504 print_rtl_graph_with_bb (dump_base_name, ".17.jump2", insns);
3508 /* If a machine dependent reorganization is needed, call it. */
3509 #ifdef MACHINE_DEPENDENT_REORG
3510 if (mach_dep_reorg_dump)
3511 open_dump_file (".18.mach", decl_printable_name (decl, 2));
3513 MACHINE_DEPENDENT_REORG (insns);
3515 if (mach_dep_reorg_dump)
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, ".18.mach", insns);
3526 /* If a scheduling pass for delayed branches is to be done,
3527 call the scheduling code. */
3530 if (optimize > 0 && flag_delayed_branch)
3533 open_dump_file (".19.dbr", decl_printable_name (decl, 2));
3538 dbr_schedule (insns, rtl_dump_file);
3543 close_dump_file (print_rtl_with_bb, insns);
3544 if (graph_dump_format != no_graph)
3545 print_rtl_graph_with_bb (dump_base_name, ".19.dbr", insns);
3553 /* Shorten branches.
3555 Note this must run before reg-stack because of death note (ab)use
3556 in the ia32 backend. */
3557 TIMEVAR (shorten_branch_time,
3559 shorten_branches (get_insns ());
3564 open_dump_file (".20.stack", decl_printable_name (decl, 2));
3566 TIMEVAR (stack_reg_time, reg_to_stack (insns, rtl_dump_file));
3570 close_dump_file (print_rtl_with_bb, insns);
3571 if (graph_dump_format != no_graph)
3572 print_rtl_graph_with_bb (dump_base_name, ".20.stack", insns);
3579 /* Now turn the rtl into assembler code. */
3581 TIMEVAR (final_time,
3586 /* Get the function's name, as described by its RTL.
3587 This may be different from the DECL_NAME name used
3588 in the source file. */
3590 x = DECL_RTL (decl);
3591 if (GET_CODE (x) != MEM)
3594 if (GET_CODE (x) != SYMBOL_REF)
3596 fnname = XSTR (x, 0);
3598 assemble_start_function (decl, fnname);
3599 final_start_function (insns, asm_out_file, optimize);
3600 final (insns, asm_out_file, optimize, 0);
3601 final_end_function (insns, asm_out_file, optimize);
3602 assemble_end_function (decl, fnname);
3604 fflush (asm_out_file);
3606 /* Release all memory allocated by flow. */
3607 free_basic_block_vars (0);
3609 /* Release all memory held by regsets now */
3610 regset_release_memory ();
3616 /* Write DBX symbols if requested */
3618 /* Note that for those inline functions where we don't initially
3619 know for certain that we will be generating an out-of-line copy,
3620 the first invocation of this routine (rest_of_compilation) will
3621 skip over this code by doing a `goto exit_rest_of_compilation;'.
3622 Later on, finish_compilation will call rest_of_compilation again
3623 for those inline functions that need to have out-of-line copies
3624 generated. During that call, we *will* be routed past here. */
3626 #ifdef DBX_DEBUGGING_INFO
3627 if (write_symbols == DBX_DEBUG)
3628 TIMEVAR (symout_time, dbxout_function (decl));
3631 #ifdef DWARF_DEBUGGING_INFO
3632 if (write_symbols == DWARF_DEBUG)
3633 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3636 #ifdef DWARF2_DEBUGGING_INFO
3637 if (write_symbols == DWARF2_DEBUG)
3638 TIMEVAR (symout_time, dwarf2out_decl (decl));
3641 exit_rest_of_compilation:
3643 /* In case the function was not output,
3644 don't leave any temporary anonymous types
3645 queued up for sdb output. */
3646 #ifdef SDB_DEBUGGING_INFO
3647 if (write_symbols == SDB_DEBUG)
3648 sdbout_types (NULL_TREE);
3651 reload_completed = 0;
3652 flow2_completed = 0;
3655 TIMEVAR (final_time,
3657 /* Clear out the insn_length contents now that they are no
3659 init_insn_lengths ();
3661 /* Clear out the real_constant_chain before some of the rtx's
3662 it runs through become garbage. */
3663 clear_const_double_mem ();
3665 /* Cancel the effect of rtl_in_current_obstack. */
3666 resume_temporary_allocation ();
3668 /* Show no temporary slots allocated. */
3671 free_basic_block_vars (0);
3674 /* Make sure volatile mem refs aren't considered valid operands for
3675 arithmetic insns. We must call this here if this is a nested inline
3676 function, since the above code leaves us in the init_recog state
3677 (from final.c), and the function context push/pop code does not
3678 save/restore volatile_ok.
3680 ??? Maybe it isn't necessary for expand_start_function to call this
3681 anymore if we do it here? */
3683 init_recog_no_volatile ();
3685 /* We're done with this function. Free up memory if we can. */
3686 free_after_parsing (cfun);
3687 if (! DECL_DEFER_OUTPUT (decl))
3688 free_after_compilation (cfun);
3694 /* The parsing time is all the time spent in yyparse
3695 *except* what is spent in this function. */
3697 parse_time -= get_run_time () - start_time;
3708 printf ("Usage: %s input [switches]\n", progname);
3709 printf ("Switches:\n");
3711 printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
3712 printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
3713 printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
3714 printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
3716 for (i = NUM_ELEM (f_options); i--;)
3718 const char * description = f_options[i].description;
3720 if (description != NULL && * description != 0)
3721 printf (" -f%-21s %s\n",
3722 f_options[i].string, description);
3725 printf (" -O[number] Set optimisation level to [number]\n");
3726 printf (" -Os Optimise for space rather than speed\n");
3727 printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
3728 printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
3729 printf (" -w Suppress warnings\n");
3730 printf (" -W Enable extra warnings\n");
3732 for (i = NUM_ELEM (W_options); i--;)
3734 const char * description = W_options[i].description;
3736 if (description != NULL && * description != 0)
3737 printf (" -W%-21s %s\n",
3738 W_options[i].string, description);
3741 printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
3742 printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
3743 printf (" -p Enable function profiling\n");
3744 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3745 printf (" -a Enable block profiling \n");
3747 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3748 printf (" -ax Enable jump profiling \n");
3750 printf (" -o <file> Place output into <file> \n");
3751 printf (" -G <number> Put global and static data smaller than <number>\n");
3752 printf (" bytes into a special section (on some targets)\n");
3754 for (i = NUM_ELEM (debug_args); i--;)
3756 if (debug_args[i].description != NULL)
3757 printf (" -g%-21s %s\n", debug_args[i].arg, debug_args[i].description);
3760 printf (" -aux-info <file> Emit declaration info into <file>.X\n");
3761 printf (" -quiet Do not display functions compiled or elapsed time\n");
3762 printf (" -version Display the compiler's version\n");
3763 printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
3764 printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
3765 #if defined INSN_SCHEDULING
3766 printf (" -sched-verbose=<number> Set the verbosity level of the scheduler\n");
3768 printf (" --help Display this information\n");
3773 /* Display descriptions of language specific options.
3774 If there is no description, note that there is an undocumented option.
3775 If the description is empty, do not display anything. (This allows
3776 options to be deliberately undocumented, for whatever reason).
3777 If the option string is missing, then this is a marker, indicating
3778 that the description string is in fact the name of a language, whose
3779 language specific options are to follow. */
3781 if (NUM_ELEM (documented_lang_options) > 1)
3783 printf ("\nLanguage specific options:\n");
3785 for (i = 0; i < NUM_ELEM (documented_lang_options); i++)
3787 const char * description = documented_lang_options[i].description;
3788 const char * option = documented_lang_options[i].option;
3790 if (description == NULL)
3795 printf (" %-23.23s [undocumented]\n", option);
3797 else if (* description == 0)
3799 else if (option == NULL)
3803 ("\nThere are undocumented %s specific options as well.\n",
3807 printf ("\n Options for %s:\n", description);
3812 printf (" %-23.23s %s\n", option, description);
3817 printf ("\nThere are undocumented %s specific options as well.\n", lang);
3819 if (NUM_ELEM (target_switches) > 1
3820 #ifdef TARGET_OPTIONS
3821 || NUM_ELEM (target_options) > 1
3829 printf ("\nTarget specific options:\n");
3831 for (i = NUM_ELEM (target_switches); i--;)
3833 const char * option = target_switches[i].name;
3834 const char * description = target_switches[i].description;
3836 if (option == NULL || * option == 0)
3838 else if (description == NULL)
3843 printf (" -m%-21.21s [undocumented]\n", option);
3845 else if (* description != 0)
3846 doc += printf (" -m%-21.21s %s\n", option, description);
3849 #ifdef TARGET_OPTIONS
3850 for (i = NUM_ELEM (target_options); i--;)
3852 const char * option = target_options[i].prefix;
3853 const char * description = target_options[i].description;
3855 if (option == NULL || * option == 0)
3857 else if (description == NULL)
3862 printf (" -m%-21.21s [undocumented]\n", option);
3864 else if (* description != 0)
3865 doc += printf (" -m%-21.21s %s\n", option, description);
3871 printf ("\nThere are undocumented target specific options as well.\n");
3873 printf (" They exist, but they are not documented.\n");
3878 /* Parse a -d... comand line switch. */
3881 decode_d_option (arg)
3888 branch_prob_dump = 1;
3895 global_reg_dump = 1;
3911 #ifdef MACHINE_DEPENDENT_REORG
3912 mach_dep_reorg_dump = 1;
3920 branch_prob_dump = 1;
3937 global_reg_dump = 1;
3962 #ifdef MACHINE_DEPENDENT_REORG
3964 mach_dep_reorg_dump = 1;
3968 flag_print_asm_name = 1;
3989 graph_dump_format = vcg;
3995 rtl_dump_and_exit = 1;
4003 case 'D': /* These are handled by the preprocessor. */
4007 warning ("unrecognised gcc debugging option: %c", arg[-1]);
4012 /* Parse a -f... comand line switch. ARG is the value after the -f.
4013 It is safe to access 'ARG - 2' to generate the full switch name.
4014 Return the number of strings consumed. */
4017 decode_f_option (arg)
4022 /* Search for the option in the table of binary f options. */
4023 for (j = sizeof (f_options) / sizeof (f_options[0]); j--;)
4025 if (!strcmp (arg, f_options[j].string))
4027 *f_options[j].variable = f_options[j].on_value;
4031 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4032 && ! strcmp (arg + 3, f_options[j].string))
4034 *f_options[j].variable = ! f_options[j].on_value;
4039 if (!strncmp (arg, "inline-limit-", 13)
4040 || !strncmp (arg, "inline-limit=", 13))
4042 read_integral_parameter (arg + 13, arg - 2, inline_max_insns);
4043 #ifdef INSN_SCHEDULING
4044 else if (!strncmp (arg, "sched-verbose=", 14))
4045 fix_sched_param ("verbose", (const char *)(arg + 14));
4047 else if (!strncmp (arg, "fixed-", 6))
4048 fix_register ((const char *)(arg + 6), 1, 1);
4049 else if (!strncmp (arg, "call-used-", 10))
4050 fix_register ((const char *)(arg + 10), 0, 1);
4051 else if (!strncmp (arg, "call-saved-", 11))
4052 fix_register ((const char *)(arg + 11), 0, 0);
4053 else if (!strncmp (arg, "align-loops=", 12))
4054 align_loops = read_integral_parameter (arg + 12, arg - 2, align_loops);
4055 else if (!strncmp (arg, "align-functions=", 16))
4057 read_integral_parameter (arg + 16, arg - 2, align_functions);
4058 else if (!strncmp (arg, "align-jumps=", 12))
4059 align_jumps = read_integral_parameter (arg + 12, arg - 2, align_jumps);
4060 else if (!strncmp (arg, "align-labels=", 13))
4061 align_labels = read_integral_parameter (arg + 13, arg - 2, align_labels);
4062 else if (!strncmp (arg, "stack-limit-register=", 21))
4064 int reg = decode_reg_name (arg + 21);
4066 error ("unrecognized register name `%s'", arg + 21);
4068 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
4070 else if (!strncmp (arg, "stack-limit-symbol=", 19))
4074 nm = ggc_alloc_string (arg + 19, strlen (arg + 19));
4076 nm = xstrdup (arg + 19);
4077 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
4079 else if (!strcmp (arg, "no-stack-limit"))
4080 stack_limit_rtx = NULL_RTX;
4081 else if (!strcmp (arg, "preprocessed"))
4082 /* Recognise this switch but do nothing. This prevents warnings
4083 about an unrecognised switch if cpplib has not been linked in. */
4091 /* Parse a -W... comand line switch. ARG is the value after the -W.
4092 It is safe to access 'ARG - 2' to generate the full switch name.
4093 Return the number of strings consumed. */
4095 decode_W_option (arg)
4100 /* Search for the option in the table of binary W options. */
4102 for (j = sizeof (W_options) / sizeof (W_options[0]); j--;)
4104 if (!strcmp (arg, W_options[j].string))
4106 *W_options[j].variable = W_options[j].on_value;
4110 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4111 && ! strcmp (arg + 3, W_options[j].string))
4113 *W_options[j].variable = ! W_options[j].on_value;
4118 if (!strncmp (arg, "id-clash-", 9))
4120 const int id_clash_val = read_integral_parameter (arg + 9, arg - 2, -1);
4122 if (id_clash_val != -1)
4124 id_clash_len = id_clash_val;
4128 else if (!strncmp (arg, "larger-than-", 12))
4130 const int larger_than_val =
4131 read_integral_parameter (arg + 12, arg - 2, -1);
4132 if (larger_than_val != -1)
4134 larger_than_size = larger_than_val;
4135 warn_larger_than = 1;
4144 /* Parse a -g... comand line switch. ARG is the value after the -g.
4145 It is safe to access 'ARG - 2' to generate the full switch name.
4146 Return the number of strings consumed. */
4149 decode_g_option (arg)
4153 /* A lot of code assumes write_symbols == NO_DEBUG if the
4154 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4155 of what debugging type has been selected). This records the
4156 selected type. It is an error to specify more than one
4158 static enum debug_info_type selected_debug_type = NO_DEBUG;
4159 /* Non-zero if debugging format has been explicitly set.
4160 -g and -ggdb don't explicitly set the debugging format so
4161 -gdwarf -g3 is equivalent to -gdwarf3. */
4162 static int type_explicitly_set_p = 0;
4163 /* Indexed by enum debug_info_type. */
4164 static const char * debug_type_names[] =
4166 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4169 /* The maximum admissible debug level value. */
4170 static const unsigned max_debug_level = 3;
4172 /* Look up ARG in the table. */
4173 for (da = debug_args; da->arg; da++)
4175 const int da_len = strlen (da->arg);
4177 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4179 enum debug_info_type type = da->debug_type;
4180 const char * p = arg + da_len;
4182 if (*p && (*p < '0' || *p > '9'))
4185 /* A debug flag without a level defaults to level 2.
4186 Note we do not want to call read_integral_parameter
4187 for that case since it will call atoi which
4190 ??? We may want to generalize the interface to
4191 read_integral_parameter to better handle this case
4192 if this case shows up often. */
4194 level = read_integral_parameter (p, 0, max_debug_level + 1);
4198 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
4200 error ("use -gdwarf -g%d for DWARF v1, level %d",
4203 error ("use -gdwarf-2 for DWARF v2");
4206 if (level > max_debug_level)
4209 ignoring option `%s' due to invalid debug level specification",
4211 level = debug_info_level;
4214 if (type == NO_DEBUG)
4216 type = PREFERRED_DEBUGGING_TYPE;
4218 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
4220 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4221 type = DWARF2_DEBUG;
4223 #ifdef DBX_DEBUGGING_INFO
4230 if (type == NO_DEBUG)
4231 warning ("`%s': unknown or unsupported -g option", arg - 2);
4233 /* Does it conflict with an already selected type? */
4234 if (type_explicitly_set_p
4235 /* -g/-ggdb don't conflict with anything */
4236 && da->debug_type != NO_DEBUG
4237 && type != selected_debug_type)
4238 warning ("`%s' ignored, conflicts with `-g%s'",
4239 arg - 2, debug_type_names[(int) selected_debug_type]);
4242 /* If the format has already been set, -g/-ggdb
4243 only change the debug level. */
4244 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4245 ; /* don't change debugging type */
4248 selected_debug_type = type;
4249 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4252 write_symbols = (level == 0
4254 : selected_debug_type);
4255 use_gnu_debug_info_extensions = da->use_extensions_p;
4256 debug_info_level = (enum debug_info_level) level;
4264 warning ("`%s': unknown or unsupported -g option", arg - 2);
4269 /* Decode the first argument in the argv as a language-independent option.
4270 Return the number of strings consumed. 'strings_processed' is the
4271 number of strings that have already been decoded in a language
4272 specific fashion before this function was invoked. */
4275 independent_decode_option (argc, argv, strings_processed)
4278 unsigned strings_processed ATTRIBUTE_UNUSED;
4280 char * arg = argv[0];
4282 if (arg[0] != '-' || arg[1] == 0)
4294 if (!strcmp (arg, "-help"))
4309 /* Already been treated in main (). Do nothing. */
4313 set_target_switch (arg + 1);
4317 return decode_f_option (arg + 1);
4320 return decode_g_option (arg + 1);
4323 if (!strcmp (arg, "dumpbase"))
4328 dump_base_name = argv[1];
4332 decode_d_option (arg + 1);
4336 if (!strcmp (arg, "pedantic"))
4338 else if (!strcmp (arg, "pedantic-errors"))
4339 flag_pedantic_errors = pedantic = 1;
4340 else if (arg[1] == 0)
4347 if (!strcmp (arg, "quiet"))
4354 if (!strcmp (arg, "version"))
4362 inhibit_warnings = 1;
4371 /* We save the value of warn_uninitialized, since if they put
4372 -Wuninitialized on the command line, we need to generate a
4373 warning about not using it without also specifying -O. */
4374 if (warn_uninitialized != 1)
4375 warn_uninitialized = 2;
4378 return decode_W_option (arg + 1);
4384 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4385 warning ("`-a' option (basic block profile) not supported");
4387 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4390 else if (!strcmp (arg, "ax"))
4392 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4393 warning ("`-ax' option (jump profiling) not supported");
4395 profile_block_flag = (!profile_block_flag
4396 || profile_block_flag == 2) ? 2 : 3;
4399 else if (!strncmp (arg, "aux-info", 8))
4401 flag_gen_aux_info = 1;
4407 aux_info_file_name = argv[1];
4411 aux_info_file_name = arg + 8;
4423 asm_file_name = argv[1];
4438 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4443 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4447 if (g_switch_val == -1)
4451 g_switch_set = TRUE;
4452 g_switch_value = g_switch_val;
4462 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4463 Exit code is 35 if can't open files, 34 if fatal error,
4464 33 if had nonfatal errors, else success. */
4466 extern int main PARAMS ((int, char **));
4476 /* save in case md file wants to emit args as a comment. */
4480 p = argv[0] + strlen (argv[0]);
4481 while (p != argv[0] && p[-1] != '/'
4482 #ifdef DIR_SEPARATOR
4483 && p[-1] != DIR_SEPARATOR
4489 #ifdef HAVE_LC_MESSAGES
4490 setlocale (LC_MESSAGES, "");
4492 (void) bindtextdomain (PACKAGE, localedir);
4493 (void) textdomain (PACKAGE);
4495 signal (SIGFPE, float_signal);
4498 signal (SIGPIPE, pipe_closed);
4501 decl_printable_name = decl_name;
4502 lang_expand_expr = (lang_expand_expr_t) do_abort;
4504 /* Initialize whether `char' is signed. */
4505 flag_signed_char = DEFAULT_SIGNED_CHAR;
4506 #ifdef DEFAULT_SHORT_ENUMS
4507 /* Initialize how much space enums occupy, by default. */
4508 flag_short_enums = DEFAULT_SHORT_ENUMS;
4511 /* Initialize the garbage-collector. */
4513 ggc_add_root (&input_file_stack, 1, sizeof input_file_stack,
4515 ggc_add_rtx_root (&stack_limit_rtx, 1);
4517 /* Perform language-specific options intialization. */
4518 lang_init_options ();
4520 /* Scan to see what optimization level has been specified. That will
4521 determine the default value of many flags. */
4522 for (i = 1; i < argc; i++)
4524 if (!strcmp (argv[i], "-O"))
4529 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4531 /* Handle -Os, -O2, -O3, -O69, ... */
4532 char *p = &argv[i][2];
4534 if ((p[0] == 's') && (p[1] == 0))
4538 /* Optimizing for size forces optimize to be 2. */
4543 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4544 if (optimize_val != -1)
4546 optimize = optimize_val;
4556 flag_thread_jumps = 1;
4558 flag_delayed_branch = 1;
4560 #ifdef CAN_DEBUG_WITHOUT_FP
4561 flag_omit_frame_pointer = 1;
4567 flag_cse_follow_jumps = 1;
4568 flag_cse_skip_blocks = 1;
4570 flag_expensive_optimizations = 1;
4571 flag_strength_reduce = 1;
4572 flag_rerun_cse_after_loop = 1;
4573 flag_rerun_loop_opt = 1;
4574 flag_caller_saves = 1;
4577 #ifdef INSN_SCHEDULING
4578 flag_schedule_insns = 1;
4579 flag_schedule_insns_after_reload = 1;
4582 flag_strict_aliasing = 1;
4583 flag_delete_null_pointer_checks = 1;
4588 flag_inline_functions = 1;
4591 if (optimize < 2 || optimize_size)
4596 align_functions = 1;
4599 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4602 set_target_switch ("");
4604 #ifdef OPTIMIZATION_OPTIONS
4605 /* Allow default optimizations to be specified on a per-machine basis. */
4606 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4609 /* Initialize register usage now so switches may override. */
4612 /* Perform normal command line switch decoding. */
4613 for (i = 1; i < argc;)
4615 unsigned lang_processed;
4616 unsigned indep_processed;
4618 /* Give the language a chance to decode the option for itself. */
4619 lang_processed = lang_decode_option (argc - i, argv + i);
4621 /* Now see if the option also has a language independent meaning.
4622 Some options are both language specific and language independent,
4623 eg --help. It is possible that there might be options that should
4624 only be decoded in a language independent way if the were not
4625 decoded in a langauge specific way, which is why 'lang_processed'
4627 indep_processed = independent_decode_option (argc - i, argv + i,
4630 if (lang_processed || indep_processed)
4631 i += (lang_processed > indep_processed
4632 ? lang_processed : indep_processed);
4635 const char * option = NULL;
4636 const char * lang = NULL;
4639 /* It is possible that the command line switch is not valid for the
4640 current language, but it is valid for another language. In order
4641 to be compatible with previous versions of the compiler (which
4642 did not issue an error message in this case) we check for this
4643 possibilty here. If we do find a match, then if extra_warnings
4644 is set we generate a warning message, otherwise we will just
4645 ignore the option. */
4646 for (j = 0; j < NUM_ELEM (documented_lang_options); j++)
4648 option = documented_lang_options[j].option;
4651 lang = documented_lang_options[j].description;
4652 else if (! strncmp (argv[i], option, strlen (option)))
4656 if (j != NUM_ELEM (documented_lang_options))
4660 warning ("Ignoring command line option '%s'", argv[i]);
4663 (It is valid for %s but not the selected langauge)", lang);
4667 error ("Unrecognised option `%s'", argv[i]);
4673 /* Checker uses the frame pointer. */
4674 if (flag_check_memory_usage)
4675 flag_omit_frame_pointer = 0;
4679 /* Inlining does not work if not optimizing,
4680 so force it not to be done. */
4684 /* The c_decode_option and lang_decode_option functions set
4685 this to `2' if -Wall is used, so we can avoid giving out
4686 lots of errors for people who don't realize what -Wall does. */
4687 if (warn_uninitialized == 1)
4688 warning ("-Wuninitialized is not supported without -O");
4691 #ifdef OVERRIDE_OPTIONS
4692 /* Some machines may reject certain combinations of options. */
4696 if (exceptions_via_longjmp == 2)
4698 #ifdef DWARF2_UNWIND_INFO
4699 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4701 exceptions_via_longjmp = 1;
4705 /* Set up the align_*_log variables, defaulting them to 1 if they
4706 were still unset. */
4707 if (align_loops <= 0) align_loops = 1;
4708 align_loops_log = floor_log2 (align_loops*2-1);
4709 if (align_jumps <= 0) align_jumps = 1;
4710 align_jumps_log = floor_log2 (align_jumps*2-1);
4711 if (align_labels <= 0) align_labels = 1;
4712 align_labels_log = floor_log2 (align_labels*2-1);
4713 if (align_functions <= 0) align_functions = 1;
4714 align_functions_log = floor_log2 (align_functions*2-1);
4716 if (profile_block_flag == 3)
4718 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4719 profile_block_flag = 2;
4722 /* Unrolling all loops implies that standard loop unrolling must also
4724 if (flag_unroll_all_loops)
4725 flag_unroll_loops = 1;
4726 /* Loop unrolling requires that strength_reduction be on also. Silently
4727 turn on strength reduction here if it isn't already on. Also, the loop
4728 unrolling code assumes that cse will be run after loop, so that must
4729 be turned on also. */
4730 if (flag_unroll_loops)
4732 flag_strength_reduce = 1;
4733 flag_rerun_cse_after_loop = 1;
4736 /* Warn about options that are not supported on this machine. */
4737 #ifndef INSN_SCHEDULING
4738 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4739 warning ("instruction scheduling not supported on this target machine");
4742 if (flag_delayed_branch)
4743 warning ("this target machine does not have delayed branches");
4746 user_label_prefix = USER_LABEL_PREFIX;
4747 if (flag_leading_underscore != -1)
4749 /* If the default prefix is more complicated than "" or "_",
4750 issue a warning and ignore this option. */
4751 if (user_label_prefix[0] == 0 ||
4752 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4754 user_label_prefix = flag_leading_underscore ? "_" : "";
4757 warning ("-f%sleading-underscore not supported on this target machine",
4758 flag_leading_underscore ? "" : "no-");
4761 /* If we are in verbose mode, write out the version and maybe all the
4762 option flags in use. */
4765 print_version (stderr, "");
4767 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4770 compile_file (filename);
4772 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4775 char *lim = (char *) sbrk (0);
4777 fnotice (stderr, "Data size %ld.\n", (long) (lim - (char *) &environ));
4782 system ("ps -l 1>&2");
4785 #endif /* not USG */
4788 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4791 return (FATAL_EXIT_CODE);
4793 return (FATAL_EXIT_CODE);
4794 return (SUCCESS_EXIT_CODE);
4797 /* Decode -m switches. */
4798 /* Decode the switch -mNAME. */
4801 set_target_switch (name)
4805 int valid_target_option = 0;
4807 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4808 if (!strcmp (target_switches[j].name, name))
4810 if (target_switches[j].value < 0)
4811 target_flags &= ~-target_switches[j].value;
4813 target_flags |= target_switches[j].value;
4814 valid_target_option = 1;
4817 #ifdef TARGET_OPTIONS
4818 if (!valid_target_option)
4819 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4821 int len = strlen (target_options[j].prefix);
4822 if (!strncmp (target_options[j].prefix, name, len))
4824 *target_options[j].variable = name + len;
4825 valid_target_option = 1;
4830 if (!valid_target_option)
4831 error ("Invalid option `%s'", name);
4834 /* Print version information to FILE.
4835 Each line begins with INDENT (for the case where FILE is the
4836 assembler output file). */
4839 print_version (file, indent)
4844 #define __VERSION__ "[?]"
4848 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4850 "%s%s%s version %s (%s) compiled by CC.\n"
4852 , indent, *indent != 0 ? " " : "",
4853 language_string, version_string, TARGET_NAME, __VERSION__);
4856 /* Print an option value and return the adjusted position in the line.
4857 ??? We don't handle error returns from fprintf (disk full); presumably
4858 other code will catch a disk full though. */
4861 print_single_switch (file, pos, max, indent, sep, term, type, name)
4864 const char *indent, *sep, *term, *type, *name;
4866 /* The ultrix fprintf returns 0 on success, so compute the result we want
4867 here since we need it for the following test. */
4868 int len = strlen (sep) + strlen (type) + strlen (name);
4873 fprintf (file, "%s", term);
4878 fprintf (file, "%s", indent);
4879 pos = strlen (indent);
4881 fprintf (file, "%s%s%s", sep, type, name);
4886 /* Print active target switches to FILE.
4887 POS is the current cursor position and MAX is the size of a "line".
4888 Each line begins with INDENT and ends with TERM.
4889 Each switch is separated from the next by SEP. */
4892 print_switch_values (file, pos, max, indent, sep, term)
4895 const char *indent, *sep, *term;
4900 /* Print the options as passed. */
4902 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4903 _("options passed: "), "");
4905 for (p = &save_argv[1]; *p != NULL; p++)
4909 if (strcmp (*p, "-o") == 0)
4915 if (strcmp (*p, "-quiet") == 0)
4917 if (strcmp (*p, "-version") == 0)
4922 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4925 fprintf (file, "%s", term);
4927 /* Print the -f and -m options that have been enabled.
4928 We don't handle language specific options but printing argv
4931 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4932 _("options enabled: "), "");
4934 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
4935 if (*f_options[j].variable == f_options[j].on_value)
4936 pos = print_single_switch (file, pos, max, indent, sep, term,
4937 "-f", f_options[j].string);
4939 /* Print target specific options. */
4941 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4942 if (target_switches[j].name[0] != '\0'
4943 && target_switches[j].value > 0
4944 && ((target_switches[j].value & target_flags)
4945 == target_switches[j].value))
4947 pos = print_single_switch (file, pos, max, indent, sep, term,
4948 "-m", target_switches[j].name);
4951 #ifdef TARGET_OPTIONS
4952 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4953 if (*target_options[j].variable != NULL)
4956 sprintf (prefix, "-m%s", target_options[j].prefix);
4957 pos = print_single_switch (file, pos, max, indent, sep, term,
4958 prefix, *target_options[j].variable);
4962 fprintf (file, "%s", term);
4965 /* Record the beginning of a new source file, named FILENAME. */
4968 debug_start_source_file (filename)
4969 register char *filename ATTRIBUTE_UNUSED;
4971 #ifdef DBX_DEBUGGING_INFO
4972 if (write_symbols == DBX_DEBUG)
4973 dbxout_start_new_source_file (filename);
4975 #ifdef DWARF_DEBUGGING_INFO
4976 if (debug_info_level == DINFO_LEVEL_VERBOSE
4977 && write_symbols == DWARF_DEBUG)
4978 dwarfout_start_new_source_file (filename);
4979 #endif /* DWARF_DEBUGGING_INFO */
4980 #ifdef DWARF2_DEBUGGING_INFO
4981 if (debug_info_level == DINFO_LEVEL_VERBOSE
4982 && write_symbols == DWARF2_DEBUG)
4983 dwarf2out_start_source_file (filename);
4984 #endif /* DWARF2_DEBUGGING_INFO */
4985 #ifdef SDB_DEBUGGING_INFO
4986 if (write_symbols == SDB_DEBUG)
4987 sdbout_start_new_source_file (filename);
4991 /* Record the resumption of a source file. LINENO is the line number in
4992 the source file we are returning to. */
4995 debug_end_source_file (lineno)
4996 register unsigned lineno ATTRIBUTE_UNUSED;
4998 #ifdef DBX_DEBUGGING_INFO
4999 if (write_symbols == DBX_DEBUG)
5000 dbxout_resume_previous_source_file ();
5002 #ifdef DWARF_DEBUGGING_INFO
5003 if (debug_info_level == DINFO_LEVEL_VERBOSE
5004 && write_symbols == DWARF_DEBUG)
5005 dwarfout_resume_previous_source_file (lineno);
5006 #endif /* DWARF_DEBUGGING_INFO */
5007 #ifdef DWARF2_DEBUGGING_INFO
5008 if (debug_info_level == DINFO_LEVEL_VERBOSE
5009 && write_symbols == DWARF2_DEBUG)
5010 dwarf2out_end_source_file ();
5011 #endif /* DWARF2_DEBUGGING_INFO */
5012 #ifdef SDB_DEBUGGING_INFO
5013 if (write_symbols == SDB_DEBUG)
5014 sdbout_resume_previous_source_file ();
5018 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5019 the tail part of the directive line, i.e. the part which is past the
5020 initial whitespace, #, whitespace, directive-name, whitespace part. */
5023 debug_define (lineno, buffer)
5024 register unsigned lineno ATTRIBUTE_UNUSED;
5025 register char *buffer ATTRIBUTE_UNUSED;
5027 #ifdef DWARF_DEBUGGING_INFO
5028 if (debug_info_level == DINFO_LEVEL_VERBOSE
5029 && write_symbols == DWARF_DEBUG)
5030 dwarfout_define (lineno, buffer);
5031 #endif /* DWARF_DEBUGGING_INFO */
5032 #ifdef DWARF2_DEBUGGING_INFO
5033 if (debug_info_level == DINFO_LEVEL_VERBOSE
5034 && write_symbols == DWARF2_DEBUG)
5035 dwarf2out_define (lineno, buffer);
5036 #endif /* DWARF2_DEBUGGING_INFO */
5039 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5040 the tail part of the directive line, i.e. the part which is past the
5041 initial whitespace, #, whitespace, directive-name, whitespace part. */
5044 debug_undef (lineno, buffer)
5045 register unsigned lineno ATTRIBUTE_UNUSED;
5046 register char *buffer ATTRIBUTE_UNUSED;
5048 #ifdef DWARF_DEBUGGING_INFO
5049 if (debug_info_level == DINFO_LEVEL_VERBOSE
5050 && write_symbols == DWARF_DEBUG)
5051 dwarfout_undef (lineno, buffer);
5052 #endif /* DWARF_DEBUGGING_INFO */
5053 #ifdef DWARF2_DEBUGGING_INFO
5054 if (debug_info_level == DINFO_LEVEL_VERBOSE
5055 && write_symbols == DWARF2_DEBUG)
5056 dwarf2out_undef (lineno, buffer);
5057 #endif /* DWARF2_DEBUGGING_INFO */