1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000 Free Software Foundation, Inc.
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
34 #ifdef HAVE_SYS_RESOURCE_H
35 # include <sys/resource.h>
38 #ifdef HAVE_SYS_TIMES_H
39 # include <sys/times.h>
47 #include "insn-attr.h"
48 #include "insn-codes.h"
49 #include "insn-config.h"
57 #include "basic-block.h"
64 #ifndef ACCUMULATE_OUTGOING_ARGS
65 #define ACCUMULATE_OUTGOING_ARGS 0
68 #ifdef DWARF_DEBUGGING_INFO
72 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
73 #include "dwarf2out.h"
76 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
80 #ifdef SDB_DEBUGGING_INFO
84 #ifdef XCOFF_DEBUGGING_INFO
89 /* The extra parameters substantially improve the I/O performance. */
91 vms_fopen (fname, type)
95 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
96 fixed arguments, which matches ANSI's specification but not VAXCRTL's
97 pre-ANSI implementation. This hack circumvents the mismatch problem. */
98 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
101 return (*vmslib_fopen) (fname, type, "mbc=32",
102 "deq=64", "fop=tef", "shr=nil");
104 return (*vmslib_fopen) (fname, type, "mbc=32");
106 #define fopen vms_fopen
109 #ifndef DEFAULT_GDB_EXTENSIONS
110 #define DEFAULT_GDB_EXTENSIONS 1
113 /* If more than one debugging type is supported, you must define
114 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
116 This is one long line cause VAXC can't handle a \-newline. */
117 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
118 #ifndef PREFERRED_DEBUGGING_TYPE
119 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
120 #endif /* no PREFERRED_DEBUGGING_TYPE */
121 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
122 so the following code needn't care. */
123 #ifdef DBX_DEBUGGING_INFO
124 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
126 #ifdef SDB_DEBUGGING_INFO
127 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
129 #ifdef DWARF_DEBUGGING_INFO
130 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
132 #ifdef DWARF2_DEBUGGING_INFO
133 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
135 #ifdef XCOFF_DEBUGGING_INFO
136 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
138 #endif /* More than one debugger format enabled. */
140 /* If still not defined, must have been because no debugging formats
142 #ifndef PREFERRED_DEBUGGING_TYPE
143 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
146 #ifdef NEED_DECLARATION_ENVIRON
147 extern char **environ;
150 /* Carry information from ASM_DECLARE_OBJECT_NAME
151 to ASM_FINISH_DECLARE_OBJECT. */
153 extern int size_directive_output;
154 extern tree last_assemble_variable_decl;
156 static void set_target_switch PARAMS ((const char *));
157 static const char *decl_name PARAMS ((tree, int));
159 static void float_signal PARAMS ((int)) ATTRIBUTE_NORETURN;
160 static void pipe_closed PARAMS ((int)) ATTRIBUTE_NORETURN;
161 #ifdef ASM_IDENTIFY_LANGUAGE
162 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
163 static void output_lang_identify PARAMS ((FILE *)) ATTRIBUTE_UNUSED;
165 static void compile_file PARAMS ((char *));
166 static void display_help PARAMS ((void));
167 static void mark_file_stack PARAMS ((void *));
169 static void decode_d_option PARAMS ((const char *));
170 static int decode_f_option PARAMS ((const char *));
171 static int decode_W_option PARAMS ((const char *));
172 static int decode_g_option PARAMS ((const char *));
173 static unsigned int independent_decode_option PARAMS ((int, char **,
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 /* Describes a dump file. */
231 struct dump_file_info
233 /* The unique extension to apply, e.g. ".jump". */
234 const char * const extension;
236 /* The -d<c> character that enables this dump file. */
237 char const debug_switch;
239 /* True if there is a corresponding graph dump file. */
240 char const graph_dump_p;
242 /* True if the user selected this dump. */
245 /* True if the files have been initialized (ie truncated). */
249 /* Enumerate the extant dump files. */
281 /* Describes all the dump files. Should be kept in order of the
282 pass and in sync with dump_file_index above. */
284 struct dump_file_info dump_file[DFI_MAX] =
286 { "rtl", 'r', 0, 0, 0 },
287 { "jump", 'j', 0, 0, 0 },
288 { "cse", 's', 0, 0, 0 },
289 { "addressof", 'F', 0, 0, 0 },
290 { "ssa", 'e', 1, 0, 0 },
291 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
292 { "gcse", 'G', 1, 0, 0 },
293 { "loop", 'L', 1, 0, 0 },
294 { "cse2", 't', 1, 0, 0 },
295 { "bp", 'b', 1, 0, 0 },
296 { "flow", 'f', 1, 0, 0 },
297 { "combine", 'c', 1, 0, 0 },
298 { "regmove", 'N', 1, 0, 0 },
299 { "sched", 'S', 1, 0, 0 },
300 { "lreg", 'l', 1, 0, 0 },
301 { "greg", 'g', 1, 0, 0 },
302 { "flow2", 'w', 1, 0, 0 },
303 { "peephole2", 'z', 1, 0, 0 },
304 { "sched2", 'R', 1, 0, 0 },
305 { "bbro", 'B', 1, 0, 0 },
306 { "rnreg", 'n', 1, 0, 0 },
307 { "jump2", 'J', 1, 0, 0 },
308 { "mach", 'M', 1, 0, 0 },
309 { "dbr", 'd', 0, 0, 0 },
310 { "stack", 'k', 1, 0, 0 },
313 static int open_dump_file PARAMS ((enum dump_file_index, tree));
314 static void close_dump_file PARAMS ((enum dump_file_index,
315 void (*) (FILE *, rtx), rtx));
317 /* Other flags saying which kinds of debugging dump have been requested. */
319 int rtl_dump_and_exit;
320 int flag_print_asm_name;
321 static int flag_print_mem;
322 static int version_flag;
323 static char * filename;
324 enum graph_dump_types graph_dump_format;
326 /* Name for output file of assembly code, specified with -o. */
330 /* Value of the -G xx switch, and whether it was passed or not. */
334 /* Type(s) of debugging information we are producing (if any).
335 See flags.h for the definitions of the different possible
336 types of debugging information. */
337 enum debug_info_type write_symbols = NO_DEBUG;
339 /* Level of debugging information we are producing. See flags.h
340 for the definitions of the different possible levels. */
341 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
343 /* Nonzero means use GNU-only extensions in the generated symbolic
344 debugging information. */
345 /* Currently, this only has an effect when write_symbols is set to
346 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
347 int use_gnu_debug_info_extensions = 0;
349 /* Nonzero means do optimizations. -O.
350 Particular numeric values stand for particular amounts of optimization;
351 thus, -O2 stores 2 here. However, the optimizations beyond the basic
352 ones are not controlled directly by this variable. Instead, they are
353 controlled by individual `flag_...' variables that are defaulted
354 based on this variable. */
358 /* Nonzero means optimize for size. -Os.
359 The only valid values are zero and non-zero. When optimize_size is
360 non-zero, optimize defaults to 2, but certain individual code
361 bloating optimizations are disabled. */
363 int optimize_size = 0;
365 /* Number of error messages and warning messages so far. */
368 int warningcount = 0;
371 /* The FUNCTION_DECL for the function currently being compiled,
372 or 0 if between functions. */
373 tree current_function_decl;
375 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
377 tree current_function_func_begin_label;
379 /* Pointer to function to compute the name to use to print a declaration.
380 DECL is the declaration in question.
381 VERBOSITY determines what information will be printed:
382 0: DECL_NAME, demangled as necessary.
383 1: and scope information.
384 2: and any other information that might be interesting, such as function
385 parameter types in C++. */
387 const char *(*decl_printable_name) PARAMS ((tree, int));
389 /* Pointer to function to compute rtl for a language-specific tree code. */
391 typedef rtx (*lang_expand_expr_t)
392 PARAMS ((union tree_node *, rtx, enum machine_mode,
393 enum expand_modifier modifier));
395 lang_expand_expr_t lang_expand_expr = 0;
397 tree (*lang_expand_constant) PARAMS ((tree)) = 0;
399 /* Pointer to function to finish handling an incomplete decl at the
400 end of compilation. */
402 void (*incomplete_decl_finalize_hook) PARAMS ((tree)) = 0;
404 /* Nonzero if generating code to do profiling. */
406 int profile_flag = 0;
408 /* Nonzero if generating code to do profiling on a line-by-line basis. */
410 int profile_block_flag;
412 /* Nonzero if generating code to profile program flow graph arcs. */
414 int profile_arc_flag = 0;
416 /* Nonzero if generating info for gcov to calculate line test coverage. */
418 int flag_test_coverage = 0;
420 /* Nonzero indicates that branch taken probabilities should be calculated. */
422 int flag_branch_probabilities = 0;
424 /* Nonzero if basic blocks should be reordered. */
426 int flag_reorder_blocks = 0;
428 /* Nonzero if registers should be renamed */
430 int flag_rename_registers = 0;
432 /* Nonzero for -pedantic switch: warn about anything
433 that standard spec forbids. */
437 /* Temporarily suppress certain warnings.
438 This is set while reading code from a system header file. */
440 int in_system_header = 0;
442 /* Don't print functions as they are compiled and don't print
443 times taken by the various passes. -quiet. */
449 /* Nonzero means `char' should be signed. */
451 int flag_signed_char;
453 /* Nonzero means give an enum type only as many bytes as it needs. */
455 int flag_short_enums;
457 /* Nonzero for -fcaller-saves: allocate values in regs that need to
458 be saved across function calls, if that produces overall better code.
459 Optional now, so people can test it. */
461 #ifdef DEFAULT_CALLER_SAVES
462 int flag_caller_saves = 1;
464 int flag_caller_saves = 0;
467 /* Nonzero if structures and unions should be returned in memory.
469 This should only be defined if compatibility with another compiler or
470 with an ABI is needed, because it results in slower code. */
472 #ifndef DEFAULT_PCC_STRUCT_RETURN
473 #define DEFAULT_PCC_STRUCT_RETURN 1
476 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
478 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
480 /* Nonzero for -fforce-mem: load memory value into a register
481 before arithmetic on it. This makes better cse but slower compilation. */
483 int flag_force_mem = 0;
485 /* Nonzero for -fforce-addr: load memory address into a register before
486 reference to memory. This makes better cse but slower compilation. */
488 int flag_force_addr = 0;
490 /* Nonzero for -fdefer-pop: don't pop args after each function call;
491 instead save them up to pop many calls' args with one insns. */
493 int flag_defer_pop = 0;
495 /* Nonzero for -ffloat-store: don't allocate floats and doubles
496 in extended-precision registers. */
498 int flag_float_store = 0;
500 /* Nonzero for -fcse-follow-jumps:
501 have cse follow jumps to do a more extensive job. */
503 int flag_cse_follow_jumps;
505 /* Nonzero for -fcse-skip-blocks:
506 have cse follow a branch around a block. */
507 int flag_cse_skip_blocks;
509 /* Nonzero for -fexpensive-optimizations:
510 perform miscellaneous relatively-expensive optimizations. */
511 int flag_expensive_optimizations;
513 /* Nonzero for -fthread-jumps:
514 have jump optimize output of loop. */
516 int flag_thread_jumps;
518 /* Nonzero enables strength-reduction in loop.c. */
520 int flag_strength_reduce = 0;
522 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
523 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
524 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
527 int flag_unroll_loops;
529 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
530 This is generally not a win. */
532 int flag_unroll_all_loops;
534 /* Nonzero forces all invariant computations in loops to be moved
537 int flag_move_all_movables = 0;
539 /* Nonzero forces all general induction variables in loops to be
542 int flag_reduce_all_givs = 0;
544 /* Nonzero to perform full register move optimization passes. This is the
547 int flag_regmove = 0;
549 /* Nonzero for -fwritable-strings:
550 store string constants in data segment and don't uniquize them. */
552 int flag_writable_strings = 0;
554 /* Nonzero means don't put addresses of constant functions in registers.
555 Used for compiling the Unix kernel, where strange substitutions are
556 done on the assembly output. */
558 int flag_no_function_cse = 0;
560 /* Nonzero for -fomit-frame-pointer:
561 don't make a frame pointer in simple functions that don't require one. */
563 int flag_omit_frame_pointer = 0;
565 /* Nonzero means place each function into its own section on those platforms
566 which support arbitrary section names and unlimited numbers of sections. */
568 int flag_function_sections = 0;
570 /* ... and similar for data. */
572 int flag_data_sections = 0;
574 /* Nonzero to inhibit use of define_optimization peephole opts. */
576 int flag_no_peephole = 0;
578 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
579 operations in the interest of optimization. For example it allows
580 GCC to assume arguments to sqrt are nonnegative numbers, allowing
581 faster code for sqrt to be generated. */
583 int flag_fast_math = 0;
585 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
587 int flag_optimize_sibling_calls = 0;
589 /* Nonzero means the front end generally wants `errno' maintained by math
590 operations, like built-in SQRT, unless overridden by flag_fast_math. */
592 int flag_errno_math = 1;
594 /* 0 means straightforward implementation of complex divide acceptable.
595 1 means wide ranges of inputs must work for complex divide.
596 2 means C9X-like requirements for complex divide (not yet implemented). */
598 int flag_complex_divide_method = 0;
600 /* Nonzero means all references through pointers are volatile. */
604 /* Nonzero means treat all global and extern variables as volatile. */
606 int flag_volatile_global;
608 /* Nonzero means treat all static variables as volatile. */
610 int flag_volatile_static;
612 /* Nonzero means just do syntax checking; don't output anything. */
614 int flag_syntax_only = 0;
616 /* Nonzero means perform global cse. */
618 static int flag_gcse;
620 /* Nonzero means to use global dataflow analysis to eliminate
621 useless null pointer tests. */
623 static int flag_delete_null_pointer_checks;
625 /* Nonzero means to rerun cse after loop optimization. This increases
626 compilation time about 20% and picks up a few more common expressions. */
628 static int flag_rerun_cse_after_loop;
630 /* Nonzero means to run loop optimizations twice. */
632 int flag_rerun_loop_opt;
634 /* Nonzero for -finline-functions: ok to inline functions that look like
635 good inline candidates. */
637 int flag_inline_functions;
639 /* Nonzero for -fkeep-inline-functions: even if we make a function
640 go inline everywhere, keep its definition around for debugging
643 int flag_keep_inline_functions;
645 /* Nonzero means that functions will not be inlined. */
649 /* Nonzero means that we should emit static const variables
650 regardless of whether or not optimization is turned on. */
652 int flag_keep_static_consts = 1;
654 /* Nonzero means we should be saving declaration info into a .X file. */
656 int flag_gen_aux_info = 0;
658 /* Specified name of aux-info file. */
660 static char *aux_info_file_name;
662 /* Nonzero means make the text shared if supported. */
664 int flag_shared_data;
666 /* Nonzero means schedule into delayed branch slots if supported. */
668 int flag_delayed_branch;
670 /* Nonzero if we are compiling pure (sharable) code.
671 Value is 1 if we are doing reasonable (i.e. simple
672 offset into offset table) pic. Value is 2 if we can
673 only perform register offsets. */
677 /* Nonzero means generate extra code for exception handling and enable
678 exception handling. */
682 /* Nonzero means use the new model for exception handling. Replaces
683 -DNEW_EH_MODEL as a compile option. */
685 int flag_new_exceptions = 1;
687 /* Nonzero means generate frame unwind info table when supported */
689 int flag_unwind_tables = 0;
691 /* Nonzero means don't place uninitialized global data in common storage
696 /* Nonzero means pretend it is OK to examine bits of target floats,
697 even if that isn't true. The resulting code will have incorrect constants,
698 but the same series of instructions that the native compiler would make. */
700 int flag_pretend_float;
702 /* Nonzero means change certain warnings into errors.
703 Usually these are warnings about failure to conform to some standard. */
705 int flag_pedantic_errors = 0;
707 /* flag_schedule_insns means schedule insns within basic blocks (before
709 flag_schedule_insns_after_reload means schedule insns after
712 int flag_schedule_insns = 0;
713 int flag_schedule_insns_after_reload = 0;
715 /* The following flags have effect only for scheduling before register
718 flag_schedule_interblock means schedule insns accross basic blocks.
719 flag_schedule_speculative means allow speculative motion of non-load insns.
720 flag_schedule_speculative_load means allow speculative motion of some
722 flag_schedule_speculative_load_dangerous allows speculative motion of more
725 int flag_schedule_interblock = 1;
726 int flag_schedule_speculative = 1;
727 int flag_schedule_speculative_load = 0;
728 int flag_schedule_speculative_load_dangerous = 0;
730 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
731 by a cheaper branch, on a count register. */
732 int flag_branch_on_count_reg;
734 /* -finhibit-size-directive inhibits output of .size for ELF.
735 This is used only for compiling crtstuff.c,
736 and it may be extended to other effects
737 needed for crtstuff.c on other systems. */
738 int flag_inhibit_size_directive = 0;
740 /* -fverbose-asm causes extra commentary information to be produced in
741 the generated assembly code (to make it more readable). This option
742 is generally only of use to those who actually need to read the
743 generated assembly code (perhaps while debugging the compiler itself).
744 -fno-verbose-asm, the default, causes the extra information
745 to be omitted and is useful when comparing two assembler files. */
747 int flag_verbose_asm = 0;
749 /* -dA causes debug commentary information to be produced in
750 the generated assembly code (to make it more readable). This option
751 is generally only of use to those who actually need to read the
752 generated assembly code (perhaps while debugging the compiler itself).
753 Currently, this switch is only used by dwarfout.c; however, it is intended
754 to be a catchall for printing debug information in the assembler file. */
756 int flag_debug_asm = 0;
758 /* -fgnu-linker specifies use of the GNU linker for initializations.
759 (Or, more generally, a linker that handles initializations.)
760 -fno-gnu-linker says that collect2 will be used. */
762 int flag_gnu_linker = 0;
764 int flag_gnu_linker = 1;
770 /* Tag all structures with __attribute__(packed) */
771 int flag_pack_struct = 0;
773 /* Emit code to check for stack overflow; also may cause large objects
774 to be allocated dynamically. */
775 int flag_stack_check;
777 /* When non-NULL, indicates that whenever space is allocated on the
778 stack, the resulting stack pointer must not pass this
779 address---that is, for stacks that grow downward, the stack pointer
780 must always be greater than or equal to this address; for stacks
781 that grow upward, the stack pointer must be less than this address.
782 At present, the rtx may be either a REG or a SYMBOL_REF, although
783 the support provided depends on the backend. */
786 /* -fcheck-memory-usage causes extra code to be generated in order to check
787 memory accesses. This is used by a detector of bad memory accesses such
789 int flag_check_memory_usage = 0;
791 /* -fprefix-function-name causes function name to be prefixed. This
792 can be used with -fcheck-memory-usage to isolate code compiled with
793 -fcheck-memory-usage. */
794 int flag_prefix_function_name = 0;
796 /* 0 if pointer arguments may alias each other. True in C.
797 1 if pointer arguments may not alias each other but may alias
799 2 if pointer arguments may not alias each other and may not
800 alias global variables. True in Fortran.
801 This defaults to 0 for C. */
802 int flag_argument_noalias = 0;
804 /* Nonzero if we should do (language-dependent) alias analysis.
805 Typically, this analysis will assume that expressions of certain
806 types do not alias expressions of certain other types. Only used
807 if alias analysis (in general) is enabled. */
808 int flag_strict_aliasing = 0;
810 /* Instrument functions with calls at entry and exit, for profiling. */
811 int flag_instrument_function_entry_exit = 0;
813 /* Nonzero means ignore `#ident' directives. 0 means handle them.
814 On SVR4 targets, it also controls whether or not to emit a
815 string identifying the compiler. */
817 int flag_no_ident = 0;
819 /* This will perform a peephole pass before sched2. */
820 int flag_peephole2 = 0;
822 /* -fbounded-pointers causes gcc to compile pointers as composite
823 objects occupying three words: the pointer value, the base address
824 of the referent object, and the address immediately beyond the end
825 of the referent object. The base and extent allow us to perform
826 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
827 int flag_bounded_pointers = 0;
829 /* -fcheck-bounds causes gcc to generate array bounds checks.
830 For C, C++: defaults to value of flag_bounded_pointers.
831 For ObjC: defaults to off.
832 For Java: defaults to on.
833 For Fortran: defaults to off.
834 For CHILL: defaults to off. */
835 int flag_bounds_check = 0;
837 /* If one, renumber instruction UIDs to reduce the number of
838 unused UIDs if there are a lot of instructions. If greater than
839 one, unconditionally renumber instruction UIDs. */
840 int flag_renumber_insns = 1;
842 /* Values of the -falign-* flags: how much to align labels in code.
843 0 means `use default', 1 means `don't align'.
844 For each variable, there is an _log variant which is the power
845 of two not less than the variable, for .align output. */
852 int align_labels_log;
854 int align_functions_log;
856 /* Table of supported debugging formats. */
860 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
861 constant expression, we use NO_DEBUG in its place. */
862 enum debug_info_type debug_type;
863 int use_extensions_p;
864 const char * description;
868 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
869 "Generate default debug format output" },
870 { "gdb", NO_DEBUG, 1, "Generate default extended debug format output" },
871 #ifdef DBX_DEBUGGING_INFO
872 { "stabs", DBX_DEBUG, 0, "Generate STABS format debug output" },
873 { "stabs+", DBX_DEBUG, 1, "Generate extended STABS format debug output" },
875 #ifdef DWARF_DEBUGGING_INFO
876 { "dwarf", DWARF_DEBUG, 0, "Generate DWARF-1 format debug output"},
877 { "dwarf+", DWARF_DEBUG, 1,
878 "Generated extended DWARF-1 format debug output" },
880 #ifdef DWARF2_DEBUGGING_INFO
881 { "dwarf-2", DWARF2_DEBUG, 0, "Enable DWARF-2 debug output" },
883 #ifdef XCOFF_DEBUGGING_INFO
884 { "xcoff", XCOFF_DEBUG, 0, "Generate XCOFF format debug output" },
885 { "xcoff+", XCOFF_DEBUG, 1, "Generate extended XCOFF format debug output" },
887 #ifdef SDB_DEBUGGING_INFO
888 { "coff", SDB_DEBUG, 0, "Generate COFF format debug output" },
898 const char * description;
900 lang_independent_options;
902 /* Add or remove a leading underscore from user symbols. */
903 int flag_leading_underscore = -1;
905 /* The user symbol prefix after having resolved same. */
906 const char *user_label_prefix;
908 /* A default for same. */
909 #ifndef USER_LABEL_PREFIX
910 #define USER_LABEL_PREFIX ""
913 /* Table of language-independent -f options.
914 STRING is the option name. VARIABLE is the address of the variable.
915 ON_VALUE is the value to store in VARIABLE
916 if `-fSTRING' is seen as an option.
917 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
919 lang_independent_options f_options[] =
921 {"float-store", &flag_float_store, 1,
922 "Do not store floats in registers" },
923 {"volatile", &flag_volatile, 1,
924 "Consider all mem refs through pointers as volatile"},
925 {"volatile-global", &flag_volatile_global, 1,
926 "Consider all mem refs to global data to be volatile" },
927 {"volatile-static", &flag_volatile_static, 1,
928 "Consider all mem refs to static data to be volatile" },
929 {"defer-pop", &flag_defer_pop, 1,
930 "Defer popping functions args from stack until later" },
931 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
932 "When possible do not generate stack frames"},
933 {"optimize-sibling-calls", &flag_optimize_sibling_calls, 1,
934 "Optimize sibling and tail recursive calls" },
935 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
936 "When running CSE, follow jumps to their targets" },
937 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
938 "When running CSE, follow conditional jumps" },
939 {"expensive-optimizations", &flag_expensive_optimizations, 1,
940 "Perform a number of minor, expensive optimisations" },
941 {"thread-jumps", &flag_thread_jumps, 1,
942 "Perform jump threading optimisations"},
943 {"strength-reduce", &flag_strength_reduce, 1,
944 "Perform strength reduction optimisations" },
945 {"unroll-loops", &flag_unroll_loops, 1,
946 "Perform loop unrolling when iteration count is known" },
947 {"unroll-all-loops", &flag_unroll_all_loops, 1,
948 "Perform loop unrolling for all loops" },
949 {"move-all-movables", &flag_move_all_movables, 1,
950 "Force all loop invariant computations out of loops" },
951 {"reduce-all-givs", &flag_reduce_all_givs, 1,
952 "Strength reduce all loop general induction variables" },
953 {"writable-strings", &flag_writable_strings, 1,
954 "Store strings in writable data section" },
955 {"peephole", &flag_no_peephole, 0,
956 "Enable machine specific peephole optimisations" },
957 {"force-mem", &flag_force_mem, 1,
958 "Copy memory operands into registers before using" },
959 {"force-addr", &flag_force_addr, 1,
960 "Copy memory address constants into regs before using" },
961 {"function-cse", &flag_no_function_cse, 0,
962 "Allow function addresses to be held in registers" },
963 {"inline-functions", &flag_inline_functions, 1,
964 "Integrate simple functions into their callers" },
965 {"keep-inline-functions", &flag_keep_inline_functions, 1,
966 "Generate code for funcs even if they are fully inlined" },
967 {"inline", &flag_no_inline, 0,
968 "Pay attention to the 'inline' keyword"},
969 {"keep-static-consts", &flag_keep_static_consts, 1,
970 "Emit static const variables even if they are not used" },
971 {"syntax-only", &flag_syntax_only, 1,
972 "Check for syntax errors, then stop" },
973 {"shared-data", &flag_shared_data, 1,
974 "Mark data as shared rather than private" },
975 {"caller-saves", &flag_caller_saves, 1,
976 "Enable saving registers around function calls" },
977 {"pcc-struct-return", &flag_pcc_struct_return, 1,
978 "Return 'short' aggregates in memory, not registers" },
979 {"reg-struct-return", &flag_pcc_struct_return, 0,
980 "Return 'short' aggregates in registers" },
981 {"delayed-branch", &flag_delayed_branch, 1,
982 "Attempt to fill delay slots of branch instructions" },
983 {"gcse", &flag_gcse, 1,
984 "Perform the global common subexpression elimination" },
985 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
986 "Run CSE pass after loop optimisations"},
987 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
988 "Run the loop optimiser twice"},
989 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
990 "Delete useless null pointer checks" },
991 {"pretend-float", &flag_pretend_float, 1,
992 "Pretend that host and target use the same FP format"},
993 {"schedule-insns", &flag_schedule_insns, 1,
994 "Reschedule instructions to avoid pipeline stalls"},
995 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
996 "Run two passes of the instruction scheduler"},
997 {"sched-interblock",&flag_schedule_interblock, 1,
998 "Enable scheduling across basic blocks" },
999 {"sched-spec",&flag_schedule_speculative, 1,
1000 "Allow speculative motion of non-loads" },
1001 {"sched-spec-load",&flag_schedule_speculative_load, 1,
1002 "Allow speculative motion of some loads" },
1003 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
1004 "Allow speculative motion of more loads" },
1005 {"branch-count-reg",&flag_branch_on_count_reg, 1,
1006 "Replace add,compare,branch with branch on count reg"},
1007 {"pic", &flag_pic, 1,
1008 "Generate position independent code, if possible"},
1009 {"PIC", &flag_pic, 2, ""},
1010 {"exceptions", &flag_exceptions, 1,
1011 "Enable exception handling" },
1012 {"new-exceptions", &flag_new_exceptions, 1,
1013 "Use the new model for exception handling" },
1014 {"unwind-tables", &flag_unwind_tables, 1,
1015 "Just generate unwind tables for exception handling" },
1016 {"sjlj-exceptions", &exceptions_via_longjmp, 1,
1017 "Use setjmp/longjmp to handle exceptions" },
1018 {"asynchronous-exceptions", &asynchronous_exceptions, 1,
1019 "Support asynchronous exceptions" },
1020 {"profile-arcs", &profile_arc_flag, 1,
1021 "Insert arc based program profiling code" },
1022 {"test-coverage", &flag_test_coverage, 1,
1023 "Create data files needed by gcov" },
1024 {"branch-probabilities", &flag_branch_probabilities, 1,
1025 "Use profiling information for branch probabilities" },
1026 {"reorder-blocks", &flag_reorder_blocks, 1,
1027 "Reorder basic blocks to improve code placement" },
1028 {"rename-registers", &flag_rename_registers, 1,
1029 "Do the register renaming optimization pass"},
1030 {"fast-math", &flag_fast_math, 1,
1031 "Improve FP speed by violating ANSI & IEEE rules" },
1032 {"common", &flag_no_common, 0,
1033 "Do not put unitialised globals in the common section" },
1034 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
1035 "Do not generate .size directives" },
1036 {"function-sections", &flag_function_sections, 1,
1037 "place each function into its own section" },
1038 {"data-sections", &flag_data_sections, 1,
1039 "place data items into their own section" },
1040 {"verbose-asm", &flag_verbose_asm, 1,
1041 "Add extra commentry to assembler output"},
1042 {"gnu-linker", &flag_gnu_linker, 1,
1043 "Output GNU ld formatted global initialisers"},
1044 {"regmove", &flag_regmove, 1,
1045 "Enables a register move optimisation"},
1046 {"optimize-register-move", &flag_regmove, 1,
1047 "Do the full regmove optimization pass"},
1048 {"pack-struct", &flag_pack_struct, 1,
1049 "Pack structure members together without holes" },
1050 {"stack-check", &flag_stack_check, 1,
1051 "Insert stack checking code into the program" },
1052 {"argument-alias", &flag_argument_noalias, 0,
1053 "Specify that arguments may alias each other & globals"},
1054 {"argument-noalias", &flag_argument_noalias, 1,
1055 "Assume arguments may alias globals but not each other"},
1056 {"argument-noalias-global", &flag_argument_noalias, 2,
1057 "Assume arguments do not alias each other or globals" },
1058 {"strict-aliasing", &flag_strict_aliasing, 1,
1059 "Assume strict aliasing rules apply" },
1060 {"align-loops", &align_loops, 0,
1061 "Align the start of loops" },
1062 {"align-jumps", &align_jumps, 0,
1063 "Align labels which are only reached by jumping" },
1064 {"align-labels", &align_labels, 0,
1065 "Align all labels" },
1066 {"align-functions", &align_functions, 0,
1067 "Align the start of functions" },
1068 {"check-memory-usage", &flag_check_memory_usage, 1,
1069 "Generate code to check every memory access" },
1070 {"prefix-function-name", &flag_prefix_function_name, 1,
1071 "Add a prefix to all function names" },
1072 {"dump-unnumbered", &flag_dump_unnumbered, 1,
1073 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1074 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
1075 "Instrument function entry/exit with profiling calls"},
1076 {"ssa", &flag_ssa, 1,
1077 "Enable SSA optimizations" },
1078 {"leading-underscore", &flag_leading_underscore, 1,
1079 "External symbols have a leading underscore" },
1080 {"ident", &flag_no_ident, 0,
1081 "Process #ident directives"},
1082 { "peephole2", &flag_peephole2, 1,
1083 "Enables an rtl peephole pass run before sched2" },
1084 {"math-errno", &flag_errno_math, 1,
1085 "Set errno after built-in math functions"},
1086 {"bounded-pointers", &flag_bounded_pointers, 1,
1087 "Compile pointers as triples: value, base & end" },
1088 {"bounds-check", &flag_bounds_check, 1,
1089 "Generate code to check bounds before dereferencing pointers and arrays" }
1092 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1094 /* Table of language-specific options. */
1096 static struct lang_opt
1098 const char * option;
1099 const char * description;
1101 documented_lang_options[] =
1103 /* In order not to overload the --help output, the convention
1104 used here is to only describe those options which are not
1105 enabled by default. */
1107 { "-ansi", "Compile just for ANSI C" },
1108 { "-fallow-single-precision",
1109 "Do not promote floats to double if using -traditional" },
1110 { "-std= ", "Determine language standard"},
1112 { "-fsigned-bitfields", "" },
1113 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1114 { "-fno-signed-bitfields", "" },
1115 { "-fno-unsigned-bitfields","" },
1116 { "-fsigned-char", "Make 'char' be signed by default"},
1117 { "-funsigned-char", "Make 'char' be unsigned by default"},
1118 { "-fno-signed-char", "" },
1119 { "-fno-unsigned-char", "" },
1121 { "-ftraditional", "" },
1122 { "-traditional", "Attempt to support traditional K&R style C"},
1123 { "-fnotraditional", "" },
1124 { "-fno-traditional", "" },
1127 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1128 { "-fbuiltin", "" },
1129 { "-fno-builtin", "Do not recognise any built in functions" },
1130 { "-fhosted", "Assume normal C execution environment" },
1131 { "-fno-hosted", "" },
1133 "Assume that standard libraries & main might not exist" },
1134 { "-fno-freestanding", "" },
1135 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1136 { "-fno-cond-mismatch", "" },
1137 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1138 { "-fno-dollars-in-identifiers", "" },
1139 { "-fpreprocessed", "" },
1140 { "-fno-preprocessed", "" },
1141 { "-fshort-double", "Use the same size for double as for float" },
1142 { "-fno-short-double", "" },
1143 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1144 { "-fno-short-enums", "" },
1145 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1146 { "-fno-short-wchar", "" },
1148 { "-Wall", "Enable most warning messages" },
1149 { "-Wbad-function-cast",
1150 "Warn about casting functions to incompatible types" },
1151 { "-Wno-bad-function-cast", "" },
1152 { "-Wmissing-noreturn",
1153 "Warn about functions which might be candidates for attribute noreturn" },
1154 { "-Wno-missing-noreturn", "" },
1155 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1156 { "-Wno-cast-qual", "" },
1157 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1158 { "-Wno-char-subscripts", "" },
1159 { "-Wcomment", "Warn if nested comments are detected" },
1160 { "-Wno-comment", "" },
1161 { "-Wcomments", "Warn if nested comments are detected" },
1162 { "-Wno-comments", "" },
1163 { "-Wconversion", "Warn about possibly confusing type conversions" },
1164 { "-Wno-conversion", "" },
1165 { "-Wformat", "Warn about printf format anomalies" },
1166 { "-Wno-format", "" },
1167 { "-Wimplicit-function-declaration",
1168 "Warn about implicit function declarations" },
1169 { "-Wno-implicit-function-declaration", "" },
1170 { "-Werror-implicit-function-declaration", "" },
1171 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1172 { "-Wno-implicit-int", "" },
1173 { "-Wimplicit", "" },
1174 { "-Wno-implicit", "" },
1175 { "-Wimport", "Warn about the use of the #import directive" },
1176 { "-Wno-import", "" },
1177 { "-Wlong-long","" },
1178 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1179 { "-Wmain", "Warn about suspicious declarations of main" },
1180 { "-Wno-main", "" },
1181 { "-Wmissing-braces",
1182 "Warn about possibly missing braces around initialisers" },
1183 { "-Wno-missing-braces", "" },
1184 { "-Wmissing-declarations",
1185 "Warn about global funcs without previous declarations"},
1186 { "-Wno-missing-declarations", "" },
1187 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1188 { "-Wno-missing-prototypes", "" },
1189 { "-Wmultichar", "Warn about use of multicharacter literals"},
1190 { "-Wno-multichar", "" },
1191 { "-Wnested-externs", "Warn about externs not at file scope level" },
1192 { "-Wno-nested-externs", "" },
1193 { "-Wparentheses", "Warn about possible missing parentheses" },
1194 { "-Wno-parentheses", "" },
1195 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1196 { "-Wno-pointer-arith", "" },
1197 { "-Wredundant-decls",
1198 "Warn about multiple declarations of the same object" },
1199 { "-Wno-redundant-decls", "" },
1200 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1201 { "-Wno-sign-compare", "" },
1202 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1203 { "-Wno-float-equal", "" },
1204 { "-Wunknown-pragmas", "Warn about unrecognized pragmas" },
1205 { "-Wno-unknown-pragmas", "" },
1206 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1207 { "-Wno-strict-prototypes", "" },
1208 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1209 { "-Wno-traditional", "" },
1210 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1211 { "-Wno-trigraphs", "" },
1213 { "-Wno-undef", "" },
1214 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1215 { "-Wno-write-strings", "" },
1217 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1219 /* These are for Objective C. */
1220 DEFINE_LANG_NAME ("Objective C")
1222 { "-lang-objc", "" },
1223 { "-gen-decls", "Dump decls to a .decl file" },
1224 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1225 { "-fno-gnu-runtime", "" },
1226 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1227 { "-fno-next-runtime", "" },
1228 { "-Wselector", "Warn if a selector has multiple methods" },
1229 { "-Wno-selector", "" },
1230 { "-Wprotocol", "" },
1231 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1232 { "-print-objc-runtime-info",
1233 "Generate C header of platform specific features" },
1235 #include "options.h"
1239 /* Here is a table, controlled by the tm.h file, listing each -m switch
1240 and which bits in `target_switches' it should set or clear.
1241 If VALUE is positive, it is bits to set.
1242 If VALUE is negative, -VALUE is bits to clear.
1243 (The sign bit is not used so there is no confusion.) */
1249 const char * description;
1251 target_switches [] = TARGET_SWITCHES;
1253 /* This table is similar, but allows the switch to have a value. */
1255 #ifdef TARGET_OPTIONS
1258 const char * prefix;
1259 const char ** variable;
1260 const char * description;
1262 target_options [] = TARGET_OPTIONS;
1265 /* Options controlling warnings */
1267 /* Don't print warning messages. -w. */
1269 int inhibit_warnings = 0;
1271 /* Print various extra warnings. -W. */
1273 int extra_warnings = 0;
1275 /* Treat warnings as errors. -Werror. */
1277 int warnings_are_errors = 0;
1279 /* Nonzero to warn about unused local variables. */
1283 /* Nonzero to warn about code which is never reached. */
1285 int warn_notreached;
1287 /* Nonzero to warn about variables used before they are initialized. */
1289 int warn_uninitialized;
1291 /* Nonzero means warn about all declarations which shadow others. */
1295 /* Warn if a switch on an enum fails to have a case for every enum value. */
1299 /* Nonzero means warn about function definitions that default the return type
1300 or that use a null return and have a return-type other than void. */
1302 int warn_return_type;
1304 /* Nonzero means warn about pointer casts that increase the required
1305 alignment of the target type (and might therefore lead to a crash
1306 due to a misaligned access). */
1308 int warn_cast_align;
1310 /* Nonzero means warn about any identifiers that match in the first N
1311 characters. The value N is in `id_clash_len'. */
1316 /* Nonzero means warn about any objects definitions whose size is larger
1317 than N bytes. Also want about function definitions whose returned
1318 values are larger than N bytes. The value N is in `larger_than_size'. */
1320 int warn_larger_than;
1321 HOST_WIDE_INT larger_than_size;
1323 /* Nonzero means warn if inline function is too large. */
1327 /* Warn if a function returns an aggregate,
1328 since there are often incompatible calling conventions for doing this. */
1330 int warn_aggregate_return;
1332 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1336 /* Warn when gcc pads a structure to an alignment boundary. */
1340 /* Likewise for -W. */
1342 lang_independent_options W_options[] =
1344 {"unused", &warn_unused, 1, "Warn when a variable is unused" },
1345 {"error", &warnings_are_errors, 1, ""},
1346 {"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
1347 {"switch", &warn_switch, 1,
1348 "Warn about enumerated switches missing a specific case" },
1349 {"aggregate-return", &warn_aggregate_return, 1,
1350 "Warn about returning structures, unions or arrays" },
1351 {"cast-align", &warn_cast_align, 1,
1352 "Warn about pointer casts which increase alignment" },
1353 {"unreachable-code", &warn_notreached, 1,
1354 "Warn about code that will never be executed" },
1355 {"uninitialized", &warn_uninitialized, 1,
1356 "Warn about unitialized automatic variables"},
1357 {"inline", &warn_inline, 1,
1358 "Warn when an inlined function cannot be inlined"},
1359 {"packed", &warn_packed, 1,
1360 "Warn when the packed attribute has no effect on struct layout"},
1361 {"padded", &warn_padded, 1,
1362 "Warn when padding is required to align struct members"}
1365 /* Output files for assembler code (real compiler output)
1366 and debugging dumps. */
1369 FILE *aux_info_file;
1370 FILE *rtl_dump_file = NULL;
1372 /* Decode the string P as an integral parameter.
1373 If the string is indeed an integer return its numeric value else
1374 issue an Invalid Option error for the option PNAME and return DEFVAL.
1375 If PNAME is zero just return DEFVAL, do not call error. */
1378 read_integral_parameter (p, pname, defval)
1383 const char *endp = p;
1387 if (*endp >= '0' && *endp <= '9')
1396 error ("Invalid option `%s'", pname);
1404 /* Time accumulators, to count the total time spent in various passes. */
1408 int integration_time;
1414 int branch_prob_time;
1419 int local_alloc_time;
1420 int global_alloc_time;
1425 int reorder_blocks_time;
1426 int rename_registers_time;
1427 int shorten_branch_time;
1435 /* Return time used so far, in microseconds. */
1445 #else /* not BeOS */
1446 #if defined (_WIN32) && !defined (__CYGWIN__)
1450 return (clock() * 1000);
1451 #else /* not _WIN32 */
1457 tick = 1000000 / sysconf(_SC_CLK_TCK);
1459 return (tms.tms_utime + tms.tms_stime) * tick;
1465 # if HAVE_SYSCONF && defined _SC_CLK_TCK
1466 # define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
1469 # define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
1471 # define TICKS_PER_SECOND HZ /* traditional UNIX */
1475 return (tms.tms_utime + tms.tms_stime) * (1000000 / TICKS_PER_SECOND);
1480 struct rusage rusage;
1481 getrusage (0, &rusage);
1482 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
1483 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
1490 int proc_system_time;
1491 int child_user_time;
1492 int child_system_time;
1494 times ((void *) &vms_times);
1495 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
1499 #endif /* _SC_CLK_TCK */
1501 #endif /* __BEOS__ */
1504 #define TIMEVAR(VAR, BODY) \
1505 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
1508 print_time (str, total)
1513 "time in %s: %d.%06d (%.0f%%)\n",
1514 str, total / 1000000, total % 1000000,
1515 all_time == 0 ? 0.00 : (double) total / (double) all_time * 100.0);
1518 /* This is the default decl_printable_name function. */
1521 decl_name (decl, verbosity)
1523 int verbosity ATTRIBUTE_UNUSED;
1525 return IDENTIFIER_POINTER (DECL_NAME (decl));
1528 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1533 struct file_stack *stack = *(struct file_stack **)p;
1535 /* We're only called for input_file_stack, so we can mark the current
1536 input_filename here as well. */
1537 ggc_mark_string (main_input_filename);
1538 ggc_mark_string (input_filename);
1542 ggc_mark_string (stack->name);
1543 stack = stack->next;
1548 /* This calls abort and is used to avoid problems when abort if a macro.
1549 It is used when we need to pass the address of abort. */
1557 /* When `malloc.c' is compiled with `rcheck' defined,
1558 it calls this function to report clobberage. */
1562 const char * s ATTRIBUTE_UNUSED;
1567 /* Return the logarithm of X, base 2, considering X unsigned,
1568 if X is a power of 2. Otherwise, returns -1.
1570 This should be used via the `exact_log2' macro. */
1574 register unsigned HOST_WIDE_INT x;
1576 register int log = 0;
1577 /* Test for 0 or a power of 2. */
1578 if (x == 0 || x != (x & -x))
1580 while ((x >>= 1) != 0)
1585 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1586 If X is 0, return -1.
1588 This should be used via the floor_log2 macro. */
1592 register unsigned HOST_WIDE_INT x;
1594 register int log = -1;
1601 static int float_handler_set;
1603 jmp_buf float_handler;
1605 /* Signals actually come here. */
1608 float_signal (signo)
1609 /* If this is missing, some compilers complain. */
1610 int signo ATTRIBUTE_UNUSED;
1612 if (float_handled == 0)
1614 #if defined (USG) || defined (hpux)
1615 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1618 signal (SIGFPE, float_signal);
1619 longjmp (float_handler, 1);
1622 /* Specify where to longjmp to when a floating arithmetic error happens.
1623 If HANDLER is 0, it means don't handle the errors any more. */
1626 set_float_handler (handler)
1629 float_handled = (handler != 0);
1631 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1633 if (float_handled && ! float_handler_set)
1635 signal (SIGFPE, float_signal);
1636 float_handler_set = 1;
1640 /* This is a wrapper function for code which might elicit an
1641 arithmetic exception. That code should be passed in as a function
1642 pointer FN, and one argument DATA. DATA is usually a struct which
1643 contains the real input and output for function FN. This function
1644 returns 0 (failure) if longjmp was called (i.e. an exception
1645 occured.) It returns 1 (success) otherwise. */
1648 do_float_handler (fn, data)
1649 void (*fn) PARAMS ((PTR));
1656 /* We got here via longjmp() caused by an exception in function fn() */
1657 set_float_handler (NULL);
1661 set_float_handler (buf);
1663 set_float_handler (NULL);
1667 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1668 error happens, pushing the previous specification into OLD_HANDLER.
1669 Return an indication of whether there was a previous handler in effect. */
1672 push_float_handler (handler, old_handler)
1673 jmp_buf handler, old_handler;
1675 int was_handled = float_handled;
1679 memcpy ((char *) old_handler, (char *) float_handler,
1680 sizeof (float_handler));
1682 memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
1686 /* Restore the previous specification of whether and where to longjmp to
1687 when a floating arithmetic error happens. */
1690 pop_float_handler (handled, handler)
1694 float_handled = handled;
1696 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1699 /* Handler for SIGPIPE. */
1703 /* If this is missing, some compilers complain. */
1704 int signo ATTRIBUTE_UNUSED;
1706 fatal ("output pipe has been closed");
1709 /* Strip off a legitimate source ending from the input string NAME of
1710 length LEN. Rather than having to know the names used by all of
1711 our front ends, we strip off an ending of a period followed by
1712 up to five characters. (Java uses ".class".) */
1715 strip_off_ending (name, len)
1720 for (i = 2; i < 6 && len > i; i++)
1722 if (name[len - i] == '.')
1724 name[len - i] = '\0';
1730 /* Output a quoted string. */
1733 output_quoted_string (asm_file, string)
1737 #ifdef OUTPUT_QUOTED_STRING
1738 OUTPUT_QUOTED_STRING (asm_file, string);
1742 putc ('\"', asm_file);
1743 while ((c = *string++) != 0)
1745 if (c == '\"' || c == '\\')
1746 putc ('\\', asm_file);
1749 putc ('\"', asm_file);
1753 /* Output a file name in the form wanted by System V. */
1756 output_file_directive (asm_file, input_name)
1758 const char *input_name;
1760 int len = strlen (input_name);
1761 const char *na = input_name + len;
1763 /* NA gets INPUT_NAME sans directory names. */
1764 while (na > input_name)
1768 #ifdef DIR_SEPARATOR
1769 if (na[-1] == DIR_SEPARATOR)
1775 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1776 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1778 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1779 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1781 fprintf (asm_file, "\t.file\t");
1782 output_quoted_string (asm_file, na);
1783 fputc ('\n', asm_file);
1788 #ifdef ASM_IDENTIFY_LANGUAGE
1789 /* Routine to build language identifier for object file. */
1791 output_lang_identify (asm_out_file)
1794 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1795 char *s = (char *) alloca (len);
1796 sprintf (s, "__gnu_compiled_%s", lang_identify ());
1797 ASM_OUTPUT_LABEL (asm_out_file, s);
1801 /* Routine to open a dump file. Return true if the dump file is enabled. */
1804 open_dump_file (index, decl)
1805 enum dump_file_index index;
1809 const char *open_arg;
1812 if (! dump_file[index].enabled)
1818 if (rtl_dump_file != NULL)
1819 fclose (rtl_dump_file);
1821 sprintf (seq, ".%02d.", index);
1823 if (! dump_file[index].initialized)
1825 /* If we've not initialized the files, do so now. */
1826 if (graph_dump_format != no_graph
1827 && dump_file[index].graph_dump_p)
1829 dump_name = concat (seq, dump_file[index].extension, NULL);
1830 clean_graph_dump_file (dump_base_name, dump_name);
1833 dump_file[index].initialized = 1;
1839 dump_name = concat (dump_base_name, seq,
1840 dump_file[index].extension, NULL);
1842 rtl_dump_file = fopen (dump_name, open_arg);
1843 if (rtl_dump_file == NULL)
1844 pfatal_with_name (dump_name);
1849 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
1850 decl_printable_name (decl, 2));
1856 /* Routine to close a dump file. */
1859 close_dump_file (index, func, insns)
1860 enum dump_file_index index;
1861 void (*func) PARAMS ((FILE *, rtx));
1864 if (! rtl_dump_file)
1871 && graph_dump_format != no_graph
1872 && dump_file[index].graph_dump_p)
1877 sprintf (seq, ".%02d.", index);
1878 suffix = concat (seq, dump_file[index].extension, NULL);
1879 print_rtl_graph_with_bb (dump_base_name, suffix, insns);
1884 func (rtl_dump_file, insns);
1886 fflush (rtl_dump_file);
1887 fclose (rtl_dump_file);
1889 rtl_dump_file = NULL;
1893 /* Do any final processing required for the declarations in VEC, of
1894 which there are LEN. We write out inline functions and variables
1895 that have been deferred until this point, but which are required.
1896 Returns non-zero if anything was put out. */
1898 wrapup_global_declarations (vec, len)
1905 int output_something = 0;
1907 for (i = 0; i < len; i++)
1911 /* We're not deferring this any longer. */
1912 DECL_DEFER_OUTPUT (decl) = 0;
1914 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1915 && incomplete_decl_finalize_hook != 0)
1916 (*incomplete_decl_finalize_hook) (decl);
1919 /* Now emit any global variables or functions that we have been
1920 putting off. We need to loop in case one of the things emitted
1921 here references another one which comes earlier in the list. */
1925 for (i = 0; i < len; i++)
1929 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1932 /* Don't write out static consts, unless we still need them.
1934 We also keep static consts if not optimizing (for debugging),
1935 unless the user specified -fno-keep-static-consts.
1936 ??? They might be better written into the debug information.
1937 This is possible when using DWARF.
1939 A language processor that wants static constants to be always
1940 written out (even if it is not used) is responsible for
1941 calling rest_of_decl_compilation itself. E.g. the C front-end
1942 calls rest_of_decl_compilation from finish_decl.
1943 One motivation for this is that is conventional in some
1944 environments to write things like:
1945 static const char rcsid[] = "... version string ...";
1946 intending to force the string to be in the executable.
1948 A language processor that would prefer to have unneeded
1949 static constants "optimized away" would just defer writing
1950 them out until here. E.g. C++ does this, because static
1951 constants are often defined in header files.
1953 ??? A tempting alternative (for both C and C++) would be
1954 to force a constant to be written if and only if it is
1955 defined in a main file, as opposed to an include file. */
1957 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1958 && (! TREE_READONLY (decl)
1959 || TREE_PUBLIC (decl)
1960 || (!optimize && flag_keep_static_consts)
1961 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1964 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1967 if (TREE_CODE (decl) == FUNCTION_DECL
1968 && DECL_INITIAL (decl) != 0
1969 && DECL_SAVED_INSNS (decl) != 0
1970 && (flag_keep_inline_functions
1971 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1972 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1975 temporary_allocation ();
1976 output_inline_function (decl);
1977 permanent_allocation (1);
1982 output_something = 1;
1986 return output_something;
1989 /* Issue appropriate warnings for the global declarations in VEC (of
1990 which there are LEN). Output debugging information for them. */
1992 check_global_declarations (vec, len)
1999 for (i = 0; i < len; i++)
2003 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2004 && ! TREE_ASM_WRITTEN (decl))
2005 /* Cancel the RTL for this decl so that, if debugging info
2006 output for global variables is still to come,
2007 this one will be omitted. */
2008 DECL_RTL (decl) = NULL;
2010 /* Warn about any function
2011 declared static but not defined.
2012 We don't warn about variables,
2013 because many programs have static variables
2014 that exist only to get some text into the object file. */
2015 if (TREE_CODE (decl) == FUNCTION_DECL
2017 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2018 && DECL_INITIAL (decl) == 0
2019 && DECL_EXTERNAL (decl)
2020 && ! DECL_ARTIFICIAL (decl)
2021 && ! TREE_PUBLIC (decl))
2023 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2024 pedwarn_with_decl (decl,
2025 "`%s' used but never defined");
2027 warning_with_decl (decl,
2028 "`%s' declared `static' but never defined");
2029 /* This symbol is effectively an "extern" declaration now. */
2030 TREE_PUBLIC (decl) = 1;
2031 assemble_external (decl);
2034 /* Warn about static fns or vars defined but not used,
2035 but not about inline functions or static consts
2036 since defining those in header files is normal practice. */
2038 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
2039 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
2040 && ! DECL_IN_SYSTEM_HEADER (decl)
2041 && ! DECL_EXTERNAL (decl)
2042 && ! TREE_PUBLIC (decl)
2043 && ! TREE_USED (decl)
2044 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
2045 /* The TREE_USED bit for file-scope decls
2046 is kept in the identifier, to handle multiple
2047 external decls in different scopes. */
2048 && ! TREE_USED (DECL_NAME (decl)))
2049 warning_with_decl (decl, "`%s' defined but not used");
2051 #ifdef SDB_DEBUGGING_INFO
2052 /* The COFF linker can move initialized global vars to the end.
2053 And that can screw up the symbol ordering.
2054 By putting the symbols in that order to begin with,
2055 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2056 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
2057 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
2058 && ! DECL_EXTERNAL (decl)
2059 && DECL_RTL (decl) != 0)
2060 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2062 /* Output COFF information for non-global
2063 file-scope initialized variables. */
2064 if (write_symbols == SDB_DEBUG
2065 && TREE_CODE (decl) == VAR_DECL
2066 && DECL_INITIAL (decl)
2067 && ! DECL_EXTERNAL (decl)
2068 && DECL_RTL (decl) != 0
2069 && GET_CODE (DECL_RTL (decl)) == MEM)
2070 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
2071 #endif /* SDB_DEBUGGING_INFO */
2072 #ifdef DWARF_DEBUGGING_INFO
2073 /* Output DWARF information for file-scope tentative data object
2074 declarations, file-scope (extern) function declarations (which
2075 had no corresponding body) and file-scope tagged type declarations
2076 and definitions which have not yet been forced out. */
2078 if (write_symbols == DWARF_DEBUG
2079 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2080 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
2082 #ifdef DWARF2_DEBUGGING_INFO
2083 /* Output DWARF2 information for file-scope tentative data object
2084 declarations, file-scope (extern) function declarations (which
2085 had no corresponding body) and file-scope tagged type declarations
2086 and definitions which have not yet been forced out. */
2088 if (write_symbols == DWARF2_DEBUG
2089 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2090 TIMEVAR (symout_time, dwarf2out_decl (decl));
2095 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2096 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2097 INPUT_FILENAME and LINENO accordingly. */
2100 push_srcloc (file, line)
2104 struct file_stack *fs;
2106 if (input_file_stack)
2108 input_file_stack->name = input_filename;
2109 input_file_stack->line = lineno;
2112 fs = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2113 fs->name = input_filename = file;
2114 fs->line = lineno = line;
2115 fs->indent_level = 0;
2116 fs->next = input_file_stack;
2117 input_file_stack = fs;
2118 input_file_stack_tick++;
2121 /* Pop the top entry off the stack of presently open source files.
2122 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2128 struct file_stack *fs;
2130 fs = input_file_stack;
2131 input_file_stack = fs->next;
2133 input_file_stack_tick++;
2134 /* The initial souce file is never popped. */
2135 if (!input_file_stack)
2137 input_filename = input_file_stack->name;
2138 lineno = input_file_stack->line;
2141 /* Compile an entire file of output from cpp, named NAME.
2142 Write a file of assembly output and various debugging dumps. */
2151 int name_specified = name != 0;
2153 if (dump_base_name == 0)
2154 dump_base_name = name ? name : "gccdump";
2158 integration_time = 0;
2164 branch_prob_time = 0;
2169 local_alloc_time = 0;
2170 global_alloc_time = 0;
2175 reorder_blocks_time = 0;
2176 rename_registers_time = 0;
2177 shorten_branch_time = 0;
2183 /* Initialize data in various passes. */
2187 name = init_parse (name);
2188 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2189 || debug_info_level == DINFO_LEVEL_VERBOSE
2190 || flag_test_coverage
2191 || warn_notreached);
2193 init_decl_processing ();
2200 init_function_once ();
2201 init_stor_layout_once ();
2202 init_varasm_once ();
2204 /* The following initialization functions need to generate rtl, so
2205 provide a dummy function context for them. */
2206 init_dummy_function_start ();
2209 if (flag_caller_saves)
2210 init_caller_save ();
2211 expand_dummy_function_end ();
2213 /* If auxiliary info generation is desired, open the output file.
2214 This goes in the same directory as the source file--unlike
2215 all the other output files. */
2216 if (flag_gen_aux_info)
2218 aux_info_file = fopen (aux_info_file_name, "w");
2219 if (aux_info_file == 0)
2220 pfatal_with_name (aux_info_file_name);
2223 /* Open assembler code output file. */
2225 if (flag_syntax_only)
2226 asm_out_file = NULL;
2229 if (! name_specified && asm_file_name == 0)
2230 asm_out_file = stdout;
2233 if (asm_file_name == 0)
2235 int len = strlen (dump_base_name);
2236 char *dumpname = (char *) xmalloc (len + 6);
2237 memcpy (dumpname, dump_base_name, len + 1);
2238 strip_off_ending (dumpname, len);
2239 strcat (dumpname, ".s");
2240 asm_file_name = dumpname;
2242 if (!strcmp (asm_file_name, "-"))
2243 asm_out_file = stdout;
2245 asm_out_file = fopen (asm_file_name, "w");
2246 if (asm_out_file == 0)
2247 pfatal_with_name (asm_file_name);
2250 #ifdef IO_BUFFER_SIZE
2251 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2252 _IOFBF, IO_BUFFER_SIZE);
2257 name = ggc_alloc_string (name, strlen (name));
2258 input_filename = name;
2260 /* Put an entry on the input file stack for the main input file. */
2261 push_srcloc (input_filename, 0);
2263 /* Perform language-specific initialization.
2264 This may set main_input_filename. */
2267 /* If the input doesn't start with a #line, use the input name
2268 as the official input file name. */
2269 if (main_input_filename == 0)
2270 main_input_filename = name;
2272 if (flag_syntax_only)
2274 write_symbols = NO_DEBUG;
2276 profile_block_flag = 0;
2280 ASM_FILE_START (asm_out_file);
2282 #ifdef ASM_COMMENT_START
2283 if (flag_verbose_asm)
2285 /* Print the list of options in effect. */
2286 print_version (asm_out_file, ASM_COMMENT_START);
2287 print_switch_values (asm_out_file, 0, MAX_LINE,
2288 ASM_COMMENT_START, " ", "\n");
2289 /* Add a blank line here so it appears in assembler output but not
2291 fprintf (asm_out_file, "\n");
2295 /* Output something to inform GDB that this compilation was by GCC. */
2296 #ifndef ASM_IDENTIFY_GCC
2297 fprintf (asm_out_file, "gcc2_compiled.:\n");
2299 ASM_IDENTIFY_GCC (asm_out_file);
2302 /* Output something to identify which front-end produced this file. */
2303 #ifdef ASM_IDENTIFY_LANGUAGE
2304 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2306 } /* ! flag_syntax_only */
2308 #ifndef ASM_OUTPUT_SECTION_NAME
2309 if (flag_function_sections)
2311 warning ("-ffunction-sections not supported for this target.");
2312 flag_function_sections = 0;
2314 if (flag_data_sections)
2316 warning ("-fdata-sections not supported for this target.");
2317 flag_data_sections = 0;
2321 if (flag_function_sections
2322 && (profile_flag || profile_block_flag))
2324 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2325 flag_function_sections = 0;
2328 #ifndef OBJECT_FORMAT_ELF
2329 if (flag_function_sections && write_symbols != NO_DEBUG)
2330 warning ("-ffunction-sections may affect debugging on some targets.");
2333 /* ??? Note: There used to be a conditional here
2334 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2335 This was to guarantee separation between gcc_compiled. and
2336 the first function, for the sake of dbx on Suns.
2337 However, having the extra zero here confused the Emacs
2338 code for unexec, and might confuse other programs too.
2339 Therefore, I took out that change.
2340 In future versions we should find another way to solve
2341 that dbx problem. -- rms, 23 May 93. */
2343 /* Don't let the first function fall at the same address
2344 as gcc_compiled., if profiling. */
2345 if (profile_flag || profile_block_flag)
2347 /* It's best if we can write a nop here since some
2348 assemblers don't tolerate zeros in the text section. */
2349 output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
2352 /* If dbx symbol table desired, initialize writing it
2353 and output the predefined types. */
2354 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2355 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2356 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
2359 #ifdef SDB_DEBUGGING_INFO
2360 if (write_symbols == SDB_DEBUG)
2361 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
2364 #ifdef DWARF_DEBUGGING_INFO
2365 if (write_symbols == DWARF_DEBUG)
2366 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
2368 #ifdef DWARF2_UNWIND_INFO
2369 if (dwarf2out_do_frame ())
2370 dwarf2out_frame_init ();
2372 #ifdef DWARF2_DEBUGGING_INFO
2373 if (write_symbols == DWARF2_DEBUG)
2374 TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
2377 /* Initialize yet another pass. */
2379 init_final (main_input_filename);
2380 init_branch_prob (dump_base_name);
2382 start_time = get_run_time ();
2384 /* Call the parser, which parses the entire file
2385 (calling rest_of_compilation for each function). */
2387 if (yyparse () != 0)
2389 if (errorcount == 0)
2390 fnotice (stderr, "Errors detected in input file (your bison.simple is out of date)\n");
2392 /* In case there were missing closebraces,
2393 get us back to the global binding level. */
2394 while (! global_bindings_p ())
2398 /* Compilation is now finished except for writing
2399 what's left of the symbol table output. */
2401 parse_time += get_run_time () - start_time;
2403 parse_time -= integration_time;
2404 parse_time -= varconst_time;
2406 if (flag_syntax_only)
2409 globals = getdecls ();
2411 /* Really define vars that have had only a tentative definition.
2412 Really output inline functions that must actually be callable
2413 and have not been output so far. */
2416 int len = list_length (globals);
2417 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2421 /* Process the decls in reverse order--earliest first.
2422 Put them into VEC from back to front, then take out from front. */
2424 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2425 vec[len - i - 1] = decl;
2427 wrapup_global_declarations (vec, len);
2429 /* This must occur after the loop to output deferred functions. Else
2430 the profiler initializer would not be emitted if all the functions
2431 in this compilation unit were deferred.
2433 output_func_start_profiler can not cause any additional functions or
2434 data to need to be output, so it need not be in the deferred function
2436 output_func_start_profiler ();
2438 /* Now that all possible functions have been output, we can dump
2439 the exception table. */
2441 output_exception_table ();
2443 check_global_declarations (vec, len);
2449 /* Write out any pending weak symbol declarations. */
2453 /* Do dbx symbols */
2454 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2455 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2456 TIMEVAR (symout_time,
2458 dbxout_finish (asm_out_file, main_input_filename);
2462 #ifdef DWARF_DEBUGGING_INFO
2463 if (write_symbols == DWARF_DEBUG)
2464 TIMEVAR (symout_time,
2470 #ifdef DWARF2_UNWIND_INFO
2471 if (dwarf2out_do_frame ())
2472 dwarf2out_frame_finish ();
2475 #ifdef DWARF2_DEBUGGING_INFO
2476 if (write_symbols == DWARF2_DEBUG)
2477 TIMEVAR (symout_time,
2479 dwarf2out_finish ();
2483 /* Output some stuff at end of file if nec. */
2485 end_final (dump_base_name);
2487 if (flag_test_coverage || flag_branch_probabilities)
2489 open_dump_file (DFI_bp, NULL);
2491 TIMEVAR (dump_time, end_branch_prob (rtl_dump_file));
2493 close_dump_file (DFI_bp, NULL, NULL_RTX);
2497 ASM_FILE_END (asm_out_file);
2500 /* Language-specific end of compilation actions. */
2504 /* Close the dump files. */
2506 if (flag_gen_aux_info)
2508 fclose (aux_info_file);
2510 unlink (aux_info_file_name);
2513 if (optimize > 0 && open_dump_file (DFI_combine, NULL))
2515 TIMEVAR (dump_time, dump_combine_total_stats (rtl_dump_file));
2516 close_dump_file (DFI_combine, NULL, NULL_RTX);
2519 /* Close non-debugging input and output files. Take special care to note
2520 whether fclose returns an error, since the pages might still be on the
2521 buffer chain while the file is open. */
2525 if (! flag_syntax_only
2526 && (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0))
2527 fatal_io_error (asm_file_name);
2529 /* Do whatever is necessary to finish printing the graphs. */
2530 if (graph_dump_format != no_graph)
2534 for (i = 0; i < DFI_MAX; ++i)
2535 if (dump_file[i].initialized && dump_file[i].graph_dump_p)
2540 sprintf (seq, ".%02d.", i);
2541 suffix = concat (seq, dump_file[i].extension, NULL);
2542 finish_graph_dump_file (dump_base_name, suffix);
2547 /* Free up memory for the benefit of leak detectors. */
2550 /* Print the times. */
2554 all_time = get_run_time ();
2556 fprintf (stderr,"\n");
2558 print_time ("parse", parse_time);
2559 print_time ("integration", integration_time);
2560 print_time ("jump", jump_time);
2561 print_time ("cse", cse_time);
2562 print_time ("gcse", gcse_time);
2563 print_time ("loop", loop_time);
2564 print_time ("cse2", cse2_time);
2565 print_time ("branch-prob", branch_prob_time);
2566 print_time ("flow", flow_time);
2567 print_time ("combine", combine_time);
2568 print_time ("regmove", regmove_time);
2569 #ifdef INSN_SCHEDULING
2570 print_time ("sched", sched_time);
2572 print_time ("local-alloc", local_alloc_time);
2573 print_time ("global-alloc", global_alloc_time);
2574 print_time ("flow2", flow2_time);
2575 #ifdef HAVE_peephole2
2576 print_time ("peephole2", peephole2_time);
2578 #ifdef INSN_SCHEDULING
2579 print_time ("sched2", sched2_time);
2582 print_time ("dbranch", dbr_sched_time);
2584 print_time ("bbro", reorder_blocks_time);
2585 print_time ("rnreg", rename_registers_time);
2586 print_time ("shorten-branch", shorten_branch_time);
2588 print_time ("stack-reg", stack_reg_time);
2590 print_time ("final", final_time);
2591 print_time ("varconst", varconst_time);
2592 print_time ("symout", symout_time);
2593 print_time ("dump", dump_time);
2595 print_time ("gc", gc_time);
2599 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2600 and TYPE_DECL nodes.
2602 This does nothing for local (non-static) variables, unless the
2603 variable is a register variable with an ASMSPEC. In that case, or
2604 if the variable is not an automatice, it sets up the RTL and
2605 outputs any assembler code (label definition, storage allocation
2606 and initialization).
2608 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2609 the assembler symbol name to be used. TOP_LEVEL is nonzero
2610 if this declaration is not within a function. */
2613 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2615 const char *asmspec;
2619 /* Declarations of variables, and of functions defined elsewhere. */
2621 /* The most obvious approach, to put an #ifndef around where
2622 this macro is used, doesn't work since it's inside a macro call. */
2623 #ifndef ASM_FINISH_DECLARE_OBJECT
2624 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2627 /* Forward declarations for nested functions are not "external",
2628 but we need to treat them as if they were. */
2629 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2630 || TREE_CODE (decl) == FUNCTION_DECL)
2631 TIMEVAR (varconst_time,
2633 make_decl_rtl (decl, asmspec, top_level);
2634 /* Initialized extern variable exists to be replaced
2635 with its value, or represents something that will be
2636 output in another file. */
2637 if (! (TREE_CODE (decl) == VAR_DECL
2638 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2639 && DECL_INITIAL (decl) != 0
2640 && DECL_INITIAL (decl) != error_mark_node))
2641 /* Don't output anything
2642 when a tentative file-scope definition is seen.
2643 But at end of compilation, do output code for them. */
2644 if (! (! at_end && top_level
2645 && (DECL_INITIAL (decl) == 0
2646 || DECL_INITIAL (decl) == error_mark_node)))
2647 assemble_variable (decl, top_level, at_end, 0);
2648 if (decl == last_assemble_variable_decl)
2650 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2654 else if (DECL_REGISTER (decl) && asmspec != 0)
2656 if (decode_reg_name (asmspec) >= 0)
2658 DECL_RTL (decl) = 0;
2659 make_decl_rtl (decl, asmspec, top_level);
2662 error ("invalid register name `%s' for register variable", asmspec);
2664 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2665 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2666 && TREE_CODE (decl) == TYPE_DECL)
2667 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2669 #ifdef SDB_DEBUGGING_INFO
2670 else if (write_symbols == SDB_DEBUG && top_level
2671 && TREE_CODE (decl) == TYPE_DECL)
2672 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2676 /* Called after finishing a record, union or enumeral type. */
2679 rest_of_type_compilation (type, toplev)
2680 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2684 tree type ATTRIBUTE_UNUSED;
2685 int toplev ATTRIBUTE_UNUSED;
2688 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2689 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2690 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2692 #ifdef SDB_DEBUGGING_INFO
2693 if (write_symbols == SDB_DEBUG)
2694 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2698 /* DECL is an inline function, whose body is present, but which is not
2699 being output at this point. (We're putting that off until we need
2700 to do it.) If there are any actions that need to take place,
2701 including the emission of debugging information for the function,
2702 this is where they should go. This function may be called by
2703 language-dependent code for front-ends that do not even generate
2704 RTL for functions that don't need to be put out. */
2707 note_deferral_of_defined_inline_function (decl)
2708 tree decl ATTRIBUTE_UNUSED;
2710 #ifdef DWARF_DEBUGGING_INFO
2711 /* Generate the DWARF info for the "abstract" instance of a function
2712 which we may later generate inlined and/or out-of-line instances
2714 if (write_symbols == DWARF_DEBUG)
2716 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2717 DWARF code expects it to be set in this case. Intuitively,
2718 DECL is the function we just finished defining, so setting
2719 CURRENT_FUNCTION_DECL is sensible. */
2720 tree saved_cfd = current_function_decl;
2721 current_function_decl = decl;
2723 /* Let the DWARF code do its work. */
2724 set_decl_abstract_flags (decl, 1);
2725 dwarfout_file_scope_decl (decl, 0);
2726 set_decl_abstract_flags (decl, 0);
2728 /* Reset CURRENT_FUNCTION_DECL. */
2729 current_function_decl = saved_cfd;
2734 /* This is called from finish_function (within yyparse)
2735 after each top-level definition is parsed.
2736 It is supposed to compile that function or variable
2737 and output the assembler code for it.
2738 After we return, the tree storage is freed. */
2741 rest_of_compilation (decl)
2745 int start_time = get_run_time ();
2748 int rebuild_label_notes_after_reload;
2750 /* When processing delayed functions, prepare_function_start() won't
2751 have been run to re-initialize it. */
2752 cse_not_expected = ! optimize;
2754 /* First, make sure that NOTE_BLOCK is set correctly for each
2755 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2756 if (!cfun->x_whole_function_mode_p)
2759 /* Then remove any notes we don't need. That will make iterating
2760 over the instruction sequence faster, and allow the garbage
2761 collector to reclaim the memory used by the notes. */
2762 remove_unncessary_notes ();
2764 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2765 tree in sensible shape. So, we just recalculate it here. */
2766 if (cfun->x_whole_function_mode_p)
2769 /* If we are reconsidering an inline function
2770 at the end of compilation, skip the stuff for making it inline. */
2772 if (DECL_SAVED_INSNS (decl) == 0)
2778 /* If this is nested inside an inlined external function, pretend
2779 it was only declared. Since we cannot inline such functions,
2780 generating code for this one is not only not necessary but will
2781 confuse some debugging output writers. */
2782 for (parent = DECL_CONTEXT (current_function_decl);
2783 parent != NULL_TREE;
2784 parent = get_containing_scope (parent))
2785 if (TREE_CODE (parent) == FUNCTION_DECL
2786 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2788 DECL_INITIAL (decl) = 0;
2789 goto exit_rest_of_compilation;
2792 /* If requested, consider whether to make this function inline. */
2793 if (DECL_INLINE (decl) || flag_inline_functions)
2794 TIMEVAR (integration_time,
2796 lose = function_cannot_inline_p (decl);
2797 if (lose || ! optimize)
2799 if (warn_inline && DECL_INLINE (decl))
2800 warning_with_decl (decl, lose);
2801 DECL_ABSTRACT_ORIGIN (decl) = 0;
2802 /* Don't really compile an extern inline function.
2803 If we can't make it inline, pretend
2804 it was only declared. */
2805 if (DECL_EXTERNAL (decl))
2807 DECL_INITIAL (decl) = 0;
2808 goto exit_rest_of_compilation;
2812 /* ??? Note that this has the effect of making it look
2813 like "inline" was specified for a function if we choose
2814 to inline it. This isn't quite right, but it's
2815 probably not worth the trouble to fix. */
2816 inlinable = DECL_INLINE (decl) = 1;
2819 insns = get_insns ();
2821 /* Dump the rtl code if we are dumping rtl. */
2823 if (open_dump_file (DFI_rtl, decl))
2825 if (DECL_SAVED_INSNS (decl))
2826 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2827 close_dump_file (DFI_rtl, print_rtl, insns);
2830 /* If function is inline, and we don't yet know whether to
2831 compile it by itself, defer decision till end of compilation.
2832 finish_compilation will call rest_of_compilation again
2833 for those functions that need to be output. Also defer those
2834 functions that we are supposed to defer. */
2837 || (DECL_INLINE (decl)
2838 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2839 && ! flag_keep_inline_functions)
2840 || DECL_EXTERNAL (decl))))
2841 DECL_DEFER_OUTPUT (decl) = 1;
2843 if (DECL_DEFER_OUTPUT (decl))
2845 /* If -Wreturn-type, we have to do a bit of compilation.
2846 However, if we just fall through we will call
2847 save_for_inline_copying() which results in excessive
2848 memory use. Instead, we just want to call
2849 jump_optimize() to figure out whether or not we can fall
2850 off the end of the function; we do the minimum amount of
2851 work necessary to make that safe. And, we set optimize
2852 to zero to keep jump_optimize from working too hard. */
2853 if (warn_return_type)
2855 int saved_optimize = optimize;
2857 find_exception_handler_labels ();
2858 jump_optimize (get_insns(), !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2859 !JUMP_AFTER_REGSCAN);
2860 optimize = saved_optimize;
2863 current_function_nothrow = nothrow_function_p ();
2864 if (current_function_nothrow)
2865 /* Now we know that this can't throw; set the flag for the benefit
2866 of other functions later in this translation unit. */
2867 TREE_NOTHROW (current_function_decl) = 1;
2869 note_deferral_of_defined_inline_function (decl);
2870 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2871 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2872 goto exit_rest_of_compilation;
2875 /* If specified extern inline but we aren't inlining it, we are
2876 done. This goes for anything that gets here with DECL_EXTERNAL
2877 set, not just things with DECL_INLINE. */
2878 if (DECL_EXTERNAL (decl))
2879 goto exit_rest_of_compilation;
2882 /* We may have potential sibling or tail recursion sites. Select one
2883 (of possibly multiple) methods of performing the call. */
2884 init_EXPR_INSN_LIST_cache ();
2885 if (flag_optimize_sibling_calls)
2886 optimize_sibling_and_tail_recursive_calls ();
2891 /* Initialize some variables used by the optimizers. */
2892 init_function_for_compilation ();
2894 if (! DECL_DEFER_OUTPUT (decl))
2895 TREE_ASM_WRITTEN (decl) = 1;
2897 /* Now that integrate will no longer see our rtl, we need not distinguish
2898 between the return value of this function and the return value of called
2900 rtx_equal_function_value_matters = 0;
2902 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2903 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2905 goto exit_rest_of_compilation;
2908 /* Emit code to get eh context, if needed. */
2912 /* If we are doing position-independent code generation, now
2913 is the time to output special prologues and epilogues.
2914 We do not want to do this earlier, because it just clutters
2915 up inline functions with meaningless insns. */
2920 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2921 Note that that may have been done above, in save_for_inline_copying.
2922 The call to resume_temporary_allocation near the end of this function
2923 goes back to the usual state of affairs. This must be done after
2924 we've built up any unwinders for exception handling, and done
2925 the FINALIZE_PIC work, if necessary. */
2927 rtl_in_current_obstack ();
2929 insns = get_insns ();
2931 /* Copy any shared structure that should not be shared. */
2933 unshare_all_rtl (current_function_decl, insns);
2935 #ifdef SETJMP_VIA_SAVE_AREA
2936 /* This must be performed before virutal register instantiation. */
2937 if (current_function_calls_alloca)
2938 optimize_save_area_alloca (insns);
2941 /* Instantiate all virtual registers. */
2943 instantiate_virtual_regs (current_function_decl, get_insns ());
2945 /* See if we have allocated stack slots that are not directly addressable.
2946 If so, scan all the insns and create explicit address computation
2947 for all references to such slots. */
2948 /* fixup_stack_slots (); */
2950 /* Find all the EH handlers. */
2951 find_exception_handler_labels ();
2953 open_dump_file (DFI_jump, decl);
2955 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2956 are initialized and to compute whether control can drop off the end
2958 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
2959 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2960 JUMP_AFTER_REGSCAN));
2962 /* Jump optimization, and the removal of NULL pointer checks, may
2963 have reduced the number of instructions substantially. CSE, and
2964 future passes, allocate arrays whose dimensions involve the maximum
2965 instruction UID, so if we can reduce the maximum UID we'll save big on
2967 renumber_insns (rtl_dump_file);
2969 close_dump_file (DFI_jump, print_rtl, insns);
2971 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2972 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
2973 goto exit_rest_of_compilation;
2975 /* Try to identify useless null pointer tests and delete them. */
2976 if (flag_delete_null_pointer_checks)
2977 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
2982 /* Perform common subexpression elimination.
2983 Nonzero value from `cse_main' means that jumps were simplified
2984 and some code may now be unreachable, so do
2985 jump optimization again. */
2989 open_dump_file (DFI_cse, decl);
2991 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
2993 if (flag_thread_jumps)
2994 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
2996 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
2998 /* If we are not running the second CSE pass, then we are no longer
2999 expecting CSE to be run. */
3000 cse_not_expected = !flag_rerun_cse_after_loop;
3002 if (tem || optimize > 1)
3003 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3005 !JUMP_AFTER_REGSCAN));
3007 /* Run this after jump optmizations remove all the unreachable code
3008 so that unreachable code will not keep values live. */
3009 TIMEVAR (cse_time, delete_trivially_dead_insns (insns, max_reg_num ()));
3011 /* Try to identify useless null pointer tests and delete them. */
3012 if (flag_delete_null_pointer_checks)
3013 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3015 /* The second pass of jump optimization is likely to have
3016 removed a bunch more instructions. */
3017 renumber_insns (rtl_dump_file);
3019 close_dump_file (DFI_cse, print_rtl, insns);
3022 open_dump_file (DFI_addressof, decl);
3024 purge_addressof (insns);
3025 reg_scan (insns, max_reg_num (), 1);
3027 close_dump_file (DFI_addressof, print_rtl, insns);
3034 open_dump_file (DFI_ssa, decl);
3036 close_dump_file (DFI_ssa, print_rtl_with_bb, insns);
3038 open_dump_file (DFI_ussa, decl);
3039 convert_from_ssa ();
3040 /* New registers have been created. Rescan their usage. */
3041 reg_scan (insns, max_reg_num (), 1);
3042 close_dump_file (DFI_ussa, print_rtl_with_bb, insns);
3044 /* Life analysis used in SSA adds log_links but these shouldn't
3045 be there until the flow stage, so clear them away. */
3046 clear_log_links (insns);
3052 /* Perform global cse. */
3054 if (optimize > 0 && flag_gcse)
3056 open_dump_file (DFI_gcse, decl);
3058 TIMEVAR (gcse_time, tem = gcse_main (insns, rtl_dump_file));
3060 /* If gcse altered any jumps, rerun jump optimizations to clean
3064 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3066 !JUMP_AFTER_REGSCAN));
3069 close_dump_file (DFI_gcse, print_rtl, insns);
3074 /* Move constant computations out of loops. */
3078 open_dump_file (DFI_loop, decl);
3083 if (flag_rerun_loop_opt)
3085 /* We only want to perform unrolling once. */
3087 loop_optimize (insns, rtl_dump_file, 0, 0);
3090 /* The first call to loop_optimize makes some instructions
3091 trivially dead. We delete those instructions now in the
3092 hope that doing so will make the heuristics in loop work
3093 better and possibly speed up compilation. */
3094 delete_trivially_dead_insns (insns, max_reg_num ());
3096 /* The regscan pass is currently necessary as the alias
3097 analysis code depends on this information. */
3098 reg_scan (insns, max_reg_num (), 1);
3100 loop_optimize (insns, rtl_dump_file, flag_unroll_loops, 1);
3103 close_dump_file (DFI_loop, print_rtl, insns);
3109 /* ??? Well, nearly. If HAVE_conditional_arithmetic, jump_optimize
3110 has put off all if-conversion until "after CSE". If we put this
3111 off any longer we may miss out doing if-conversion entirely. */
3112 cse_not_expected = 1;
3116 open_dump_file (DFI_cse2, decl);
3118 if (flag_rerun_cse_after_loop)
3120 /* Running another jump optimization pass before the second
3121 cse pass sometimes simplifies the RTL enough to allow
3122 the second CSE pass to do a better job. Jump_optimize can change
3123 max_reg_num so we must rerun reg_scan afterwards.
3124 ??? Rework to not call reg_scan so often. */
3125 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3126 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3128 JUMP_AFTER_REGSCAN));
3130 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3131 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3134 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3136 !JUMP_AFTER_REGSCAN));
3139 if (flag_thread_jumps)
3141 /* This pass of jump threading straightens out code
3142 that was kinked by loop optimization. */
3143 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3144 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3147 close_dump_file (DFI_cse2, print_rtl, insns);
3153 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3155 open_dump_file (DFI_bp, decl);
3160 branch_prob (insns, rtl_dump_file);
3163 close_dump_file (DFI_bp, print_rtl, insns);
3171 /* Print function header into flow dump now
3172 because doing the flow analysis makes some of the dump. */
3174 open_dump_file (DFI_flow, decl);
3176 /* Do control and data flow analysis; wrote some of the results to
3182 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3183 cleanup_cfg (insns);
3185 calculate_loop_depth (rtl_dump_file);
3186 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3187 mark_constant_function ();
3190 if (warn_uninitialized || extra_warnings)
3192 uninitialized_vars_warning (DECL_INITIAL (decl));
3194 setjmp_args_warning ();
3197 close_dump_file (DFI_flow, print_rtl_with_bb, insns);
3202 /* The first life analysis pass has finished. From now on we can not
3203 generate any new pseudos. */
3206 /* If -opt, try combining insns through substitution. */
3210 int rebuild_jump_labels_after_combine = 0;
3212 open_dump_file (DFI_combine, decl);
3214 TIMEVAR (combine_time,
3216 rebuild_jump_labels_after_combine
3217 = combine_instructions (insns, max_reg_num ());
3220 /* Combining insns may have turned an indirect jump into a
3221 direct jump. Rebuid the JUMP_LABEL fields of jumping
3223 if (rebuild_jump_labels_after_combine)
3225 TIMEVAR (jump_time, rebuild_jump_labels (insns));
3228 close_dump_file (DFI_combine, print_rtl_with_bb, insns);
3234 /* Register allocation pre-pass, to reduce number of moves
3235 necessary for two-address machines. */
3236 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3238 open_dump_file (DFI_regmove, decl);
3240 TIMEVAR (regmove_time, regmove_optimize (insns, max_reg_num (),
3243 close_dump_file (DFI_regmove, print_rtl_with_bb, insns);
3249 if (optimize && n_basic_blocks)
3251 TIMEVAR (gcse_time, optimize_mode_switching (NULL_PTR));
3254 #ifdef INSN_SCHEDULING
3256 /* Print function header into sched dump now
3257 because doing the sched analysis makes some of the dump. */
3258 if (optimize > 0 && flag_schedule_insns)
3260 open_dump_file (DFI_sched, decl);
3262 /* Do control and data sched analysis,
3263 and write some of the results to dump file. */
3265 TIMEVAR (sched_time, schedule_insns (rtl_dump_file));
3267 close_dump_file (DFI_sched, print_rtl_with_bb, insns);
3274 /* Determine if the current function is a leaf before running reload
3275 since this can impact optimizations done by the prologue and
3276 epilogue thus changing register elimination offsets. */
3277 current_function_is_leaf = leaf_function_p ();
3279 open_dump_file (DFI_lreg, decl);
3281 /* Allocate pseudo-regs that are used only within 1 basic block.
3283 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3284 jump optimizer after register allocation and reloading are finished. */
3286 TIMEVAR (local_alloc_time,
3288 /* We recomputed reg usage as part of updating the rest
3289 of life info during sched. */
3290 if (! flag_schedule_insns)
3291 recompute_reg_usage (insns, ! optimize_size);
3292 regclass (insns, max_reg_num (), rtl_dump_file);
3293 rebuild_label_notes_after_reload = local_alloc ();
3296 if (dump_file[DFI_lreg].enabled)
3298 TIMEVAR (dump_time, dump_flow_info (rtl_dump_file));
3299 TIMEVAR (dump_time, dump_local_alloc (rtl_dump_file));
3301 close_dump_file (DFI_lreg, print_rtl_with_bb, insns);
3307 open_dump_file (DFI_greg, decl);
3309 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3310 pass fixing up any insns that are invalid. */
3312 TIMEVAR (global_alloc_time,
3315 failure = global_alloc (rtl_dump_file);
3318 build_insn_chain (insns);
3319 failure = reload (insns, 0, rtl_dump_file);
3324 goto exit_rest_of_compilation;
3329 /* Do a very simple CSE pass over just the hard registers. */
3331 reload_cse_regs (insns);
3333 /* If optimizing and we are performing instruction scheduling after
3334 reload, then go ahead and split insns now since we are about to
3335 recompute flow information anyway.
3337 reload_cse_regs may expose more splitting opportunities, expecially
3338 for double-word operations. */
3339 if (optimize > 0 && flag_schedule_insns_after_reload)
3340 split_all_insns (0);
3342 /* Register allocation and reloading may have turned an indirect jump into
3343 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3344 jumping instructions. */
3345 if (rebuild_label_notes_after_reload)
3346 TIMEVAR (jump_time, rebuild_jump_labels (insns));
3348 if (dump_file[DFI_greg].enabled)
3350 TIMEVAR (dump_time, dump_global_regs (rtl_dump_file));
3351 close_dump_file (DFI_greg, print_rtl_with_bb, insns);
3354 /* Re-create the death notes which were deleted during reload. */
3355 open_dump_file (DFI_flow2, decl);
3357 TIMEVAR (flow2_time,
3359 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3362 /* On some machines, the prologue and epilogue code, or parts thereof,
3363 can be represented as RTL. Doing so lets us schedule insns between
3364 it and the rest of the code and also allows delayed branch
3365 scheduling to operate in the epilogue. */
3366 thread_prologue_and_epilogue_insns (insns);
3370 TIMEVAR (flow2_time,
3372 cleanup_cfg (insns);
3373 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3376 /* This is kind of heruistics. We need to run combine_stack_adjustments
3377 even for machines with possibly nonzero RETURN_POPS_ARGS
3378 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3379 push instructions will have popping returns. */
3380 #ifndef PUSH_ROUNDING
3381 if (!ACCUMULATE_OUTGOING_ARGS)
3383 TIMEVAR (flow2_time, { combine_stack_adjustments (); });
3389 flow2_completed = 1;
3391 close_dump_file (DFI_flow2, print_rtl_with_bb, insns);
3393 #ifdef HAVE_peephole2
3394 if (optimize > 0 && flag_peephole2)
3396 open_dump_file (DFI_peephole2, decl);
3398 TIMEVAR (peephole2_time, peephole2_optimize (rtl_dump_file));
3400 close_dump_file (DFI_peephole2, print_rtl_with_bb, insns);
3404 #ifdef INSN_SCHEDULING
3405 if (optimize > 0 && flag_schedule_insns_after_reload)
3407 open_dump_file (DFI_sched2, decl);
3409 /* Do control and data sched analysis again,
3410 and write some more of the results to dump file. */
3412 TIMEVAR (sched2_time, schedule_insns (rtl_dump_file));
3414 close_dump_file (DFI_sched2, print_rtl_with_bb, insns);
3421 #ifdef LEAF_REGISTERS
3422 current_function_uses_only_leaf_regs
3423 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3426 if (optimize > 0 && flag_reorder_blocks)
3428 open_dump_file (DFI_bbro, decl);
3430 TIMEVAR (reorder_blocks_time, reorder_basic_blocks ());
3432 close_dump_file (DFI_bbro, print_rtl_with_bb, insns);
3435 if (optimize > 0 && flag_rename_registers)
3437 open_dump_file (DFI_rnreg, decl);
3439 TIMEVAR (rename_registers_time, regrename_optimize ());
3441 close_dump_file (DFI_rnreg, print_rtl_with_bb, insns);
3444 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3445 Also do cross-jumping this time and delete no-op move insns. */
3449 open_dump_file (DFI_jump2, decl);
3451 TIMEVAR (jump_time, jump_optimize (insns, JUMP_CROSS_JUMP,
3453 !JUMP_AFTER_REGSCAN));
3455 close_dump_file (DFI_jump2, print_rtl_with_bb, insns);
3458 /* If a machine dependent reorganization is needed, call it. */
3459 #ifdef MACHINE_DEPENDENT_REORG
3460 open_dump_file (DFI_mach, decl);
3462 MACHINE_DEPENDENT_REORG (insns);
3464 close_dump_file (DFI_mach, print_rtl_with_bb, insns);
3470 /* If a scheduling pass for delayed branches is to be done,
3471 call the scheduling code. */
3474 if (optimize > 0 && flag_delayed_branch)
3476 open_dump_file (DFI_dbr, decl);
3481 dbr_schedule (insns, rtl_dump_file);
3484 close_dump_file (DFI_dbr, print_rtl_with_bb, insns);
3491 /* Shorten branches.
3493 Note this must run before reg-stack because of death note (ab)use
3494 in the ia32 backend. */
3495 TIMEVAR (shorten_branch_time,
3497 shorten_branches (get_insns ());
3501 open_dump_file (DFI_stack, decl);
3503 TIMEVAR (stack_reg_time, reg_to_stack (insns, rtl_dump_file));
3505 close_dump_file (DFI_stack, print_rtl_with_bb, insns);
3511 current_function_nothrow = nothrow_function_p ();
3512 if (current_function_nothrow)
3513 /* Now we know that this can't throw; set the flag for the benefit
3514 of other functions later in this translation unit. */
3515 TREE_NOTHROW (current_function_decl) = 1;
3517 /* Now turn the rtl into assembler code. */
3519 TIMEVAR (final_time,
3524 /* Get the function's name, as described by its RTL.
3525 This may be different from the DECL_NAME name used
3526 in the source file. */
3528 x = DECL_RTL (decl);
3529 if (GET_CODE (x) != MEM)
3532 if (GET_CODE (x) != SYMBOL_REF)
3534 fnname = XSTR (x, 0);
3536 assemble_start_function (decl, fnname);
3537 final_start_function (insns, asm_out_file, optimize);
3538 final (insns, asm_out_file, optimize, 0);
3539 final_end_function (insns, asm_out_file, optimize);
3540 assemble_end_function (decl, fnname);
3542 fflush (asm_out_file);
3544 /* Release all memory allocated by flow. */
3545 free_basic_block_vars (0);
3547 /* Release all memory held by regsets now */
3548 regset_release_memory ();
3554 /* Write DBX symbols if requested */
3556 /* Note that for those inline functions where we don't initially
3557 know for certain that we will be generating an out-of-line copy,
3558 the first invocation of this routine (rest_of_compilation) will
3559 skip over this code by doing a `goto exit_rest_of_compilation;'.
3560 Later on, finish_compilation will call rest_of_compilation again
3561 for those inline functions that need to have out-of-line copies
3562 generated. During that call, we *will* be routed past here. */
3564 #ifdef DBX_DEBUGGING_INFO
3565 if (write_symbols == DBX_DEBUG)
3566 TIMEVAR (symout_time, dbxout_function (decl));
3569 #ifdef DWARF_DEBUGGING_INFO
3570 if (write_symbols == DWARF_DEBUG)
3571 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3574 #ifdef DWARF2_DEBUGGING_INFO
3575 if (write_symbols == DWARF2_DEBUG)
3576 TIMEVAR (symout_time, dwarf2out_decl (decl));
3579 exit_rest_of_compilation:
3581 /* In case the function was not output,
3582 don't leave any temporary anonymous types
3583 queued up for sdb output. */
3584 #ifdef SDB_DEBUGGING_INFO
3585 if (write_symbols == SDB_DEBUG)
3586 sdbout_types (NULL_TREE);
3589 reload_completed = 0;
3590 flow2_completed = 0;
3593 TIMEVAR (final_time,
3595 /* Clear out the insn_length contents now that they are no
3597 init_insn_lengths ();
3599 /* Clear out the real_constant_chain before some of the rtx's
3600 it runs through become garbage. */
3601 clear_const_double_mem ();
3603 /* Cancel the effect of rtl_in_current_obstack. */
3604 resume_temporary_allocation ();
3606 /* Show no temporary slots allocated. */
3609 free_basic_block_vars (0);
3612 /* Make sure volatile mem refs aren't considered valid operands for
3613 arithmetic insns. We must call this here if this is a nested inline
3614 function, since the above code leaves us in the init_recog state
3615 (from final.c), and the function context push/pop code does not
3616 save/restore volatile_ok.
3618 ??? Maybe it isn't necessary for expand_start_function to call this
3619 anymore if we do it here? */
3621 init_recog_no_volatile ();
3623 /* We're done with this function. Free up memory if we can. */
3624 free_after_parsing (cfun);
3625 if (! DECL_DEFER_OUTPUT (decl))
3626 free_after_compilation (cfun);
3632 /* The parsing time is all the time spent in yyparse
3633 *except* what is spent in this function. */
3635 parse_time -= get_run_time () - start_time;
3646 printf ("Usage: %s input [switches]\n", progname);
3647 printf ("Switches:\n");
3649 printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
3650 printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
3651 printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
3652 printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
3654 for (i = NUM_ELEM (f_options); i--;)
3656 const char * description = f_options[i].description;
3658 if (description != NULL && * description != 0)
3659 printf (" -f%-21s %s\n",
3660 f_options[i].string, description);
3663 printf (" -O[number] Set optimisation level to [number]\n");
3664 printf (" -Os Optimise for space rather than speed\n");
3665 printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
3666 printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
3667 printf (" -w Suppress warnings\n");
3668 printf (" -W Enable extra warnings\n");
3670 for (i = NUM_ELEM (W_options); i--;)
3672 const char * description = W_options[i].description;
3674 if (description != NULL && * description != 0)
3675 printf (" -W%-21s %s\n",
3676 W_options[i].string, description);
3679 printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
3680 printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
3681 printf (" -p Enable function profiling\n");
3682 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3683 printf (" -a Enable block profiling \n");
3685 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3686 printf (" -ax Enable jump profiling \n");
3688 printf (" -o <file> Place output into <file> \n");
3689 printf (" -G <number> Put global and static data smaller than <number>\n");
3690 printf (" bytes into a special section (on some targets)\n");
3692 for (i = NUM_ELEM (debug_args); i--;)
3694 if (debug_args[i].description != NULL)
3695 printf (" -g%-21s %s\n", debug_args[i].arg, debug_args[i].description);
3698 printf (" -aux-info <file> Emit declaration info into <file>.X\n");
3699 printf (" -quiet Do not display functions compiled or elapsed time\n");
3700 printf (" -version Display the compiler's version\n");
3701 printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
3702 printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
3703 #if defined INSN_SCHEDULING
3704 printf (" -sched-verbose=<number> Set the verbosity level of the scheduler\n");
3706 printf (" --help Display this information\n");
3711 /* Display descriptions of language specific options.
3712 If there is no description, note that there is an undocumented option.
3713 If the description is empty, do not display anything. (This allows
3714 options to be deliberately undocumented, for whatever reason).
3715 If the option string is missing, then this is a marker, indicating
3716 that the description string is in fact the name of a language, whose
3717 language specific options are to follow. */
3719 if (NUM_ELEM (documented_lang_options) > 1)
3721 printf ("\nLanguage specific options:\n");
3723 for (i = 0; i < NUM_ELEM (documented_lang_options); i++)
3725 const char * description = documented_lang_options[i].description;
3726 const char * option = documented_lang_options[i].option;
3728 if (description == NULL)
3733 printf (" %-23.23s [undocumented]\n", option);
3735 else if (* description == 0)
3737 else if (option == NULL)
3741 ("\nThere are undocumented %s specific options as well.\n",
3745 printf ("\n Options for %s:\n", description);
3750 printf (" %-23.23s %s\n", option, description);
3755 printf ("\nThere are undocumented %s specific options as well.\n", lang);
3757 if (NUM_ELEM (target_switches) > 1
3758 #ifdef TARGET_OPTIONS
3759 || NUM_ELEM (target_options) > 1
3767 printf ("\nTarget specific options:\n");
3769 for (i = NUM_ELEM (target_switches); i--;)
3771 const char * option = target_switches[i].name;
3772 const char * description = target_switches[i].description;
3774 if (option == NULL || * option == 0)
3776 else if (description == NULL)
3781 printf (" -m%-21.21s [undocumented]\n", option);
3783 else if (* description != 0)
3784 doc += printf (" -m%-21.21s %s\n", option, description);
3787 #ifdef TARGET_OPTIONS
3788 for (i = NUM_ELEM (target_options); i--;)
3790 const char * option = target_options[i].prefix;
3791 const char * description = target_options[i].description;
3793 if (option == NULL || * option == 0)
3795 else if (description == NULL)
3800 printf (" -m%-21.21s [undocumented]\n", option);
3802 else if (* description != 0)
3803 doc += printf (" -m%-21.21s %s\n", option, description);
3809 printf ("\nThere are undocumented target specific options as well.\n");
3811 printf (" They exist, but they are not documented.\n");
3816 /* Parse a -d... comand line switch. */
3819 decode_d_option (arg)
3828 for (i = 0; i < DFI_MAX; ++i)
3829 dump_file[i].enabled = 1;
3838 flag_print_asm_name = 1;
3841 graph_dump_format = vcg;
3844 rtl_dump_and_exit = 1;
3849 case 'D': /* These are handled by the preprocessor. */
3855 for (i = 0; i < DFI_MAX; ++i)
3856 if (c == dump_file[i].debug_switch)
3858 dump_file[i].enabled = 1;
3863 warning ("unrecognized gcc debugging option: %c", c);
3868 /* Parse a -f... comand line switch. ARG is the value after the -f.
3869 It is safe to access 'ARG - 2' to generate the full switch name.
3870 Return the number of strings consumed. */
3873 decode_f_option (arg)
3878 /* Search for the option in the table of binary f options. */
3879 for (j = sizeof (f_options) / sizeof (f_options[0]); j--;)
3881 if (!strcmp (arg, f_options[j].string))
3883 *f_options[j].variable = f_options[j].on_value;
3887 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
3888 && ! strcmp (arg + 3, f_options[j].string))
3890 *f_options[j].variable = ! f_options[j].on_value;
3895 if (!strncmp (arg, "inline-limit-", 13)
3896 || !strncmp (arg, "inline-limit=", 13))
3898 read_integral_parameter (arg + 13, arg - 2, inline_max_insns);
3899 #ifdef INSN_SCHEDULING
3900 else if (!strncmp (arg, "sched-verbose=", 14))
3901 fix_sched_param ("verbose", (const char *)(arg + 14));
3903 else if (!strncmp (arg, "fixed-", 6))
3904 fix_register ((const char *)(arg + 6), 1, 1);
3905 else if (!strncmp (arg, "call-used-", 10))
3906 fix_register ((const char *)(arg + 10), 0, 1);
3907 else if (!strncmp (arg, "call-saved-", 11))
3908 fix_register ((const char *)(arg + 11), 0, 0);
3909 else if (!strncmp (arg, "align-loops=", 12))
3910 align_loops = read_integral_parameter (arg + 12, arg - 2, align_loops);
3911 else if (!strncmp (arg, "align-functions=", 16))
3913 = read_integral_parameter (arg + 16, arg - 2, align_functions);
3914 else if (!strncmp (arg, "align-jumps=", 12))
3915 align_jumps = read_integral_parameter (arg + 12, arg - 2, align_jumps);
3916 else if (!strncmp (arg, "align-labels=", 13))
3917 align_labels = read_integral_parameter (arg + 13, arg - 2, align_labels);
3918 else if (!strncmp (arg, "stack-limit-register=", 21))
3920 int reg = decode_reg_name (arg + 21);
3922 error ("unrecognized register name `%s'", arg + 21);
3924 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
3926 else if (!strncmp (arg, "stack-limit-symbol=", 19))
3930 nm = ggc_alloc_string (arg + 19, strlen (arg + 19));
3932 nm = xstrdup (arg + 19);
3933 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
3935 else if (!strcmp (arg, "no-stack-limit"))
3936 stack_limit_rtx = NULL_RTX;
3937 else if (!strcmp (arg, "preprocessed"))
3938 /* Recognise this switch but do nothing. This prevents warnings
3939 about an unrecognized switch if cpplib has not been linked in. */
3947 /* Parse a -W... comand line switch. ARG is the value after the -W.
3948 It is safe to access 'ARG - 2' to generate the full switch name.
3949 Return the number of strings consumed. */
3952 decode_W_option (arg)
3957 /* Search for the option in the table of binary W options. */
3959 for (j = sizeof (W_options) / sizeof (W_options[0]); j--;)
3961 if (!strcmp (arg, W_options[j].string))
3963 *W_options[j].variable = W_options[j].on_value;
3967 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
3968 && ! strcmp (arg + 3, W_options[j].string))
3970 *W_options[j].variable = ! W_options[j].on_value;
3975 if (!strncmp (arg, "id-clash-", 9))
3977 id_clash_len = read_integral_parameter (arg + 9, arg - 2, -1);
3979 if (id_clash_len != -1)
3982 else if (!strncmp (arg, "larger-than-", 12))
3984 larger_than_size = read_integral_parameter (arg + 12, arg - 2, -1);
3986 if (larger_than_size != -1)
3987 warn_larger_than = 1;
3995 /* Parse a -g... comand line switch. ARG is the value after the -g.
3996 It is safe to access 'ARG - 2' to generate the full switch name.
3997 Return the number of strings consumed. */
4000 decode_g_option (arg)
4004 /* A lot of code assumes write_symbols == NO_DEBUG if the
4005 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4006 of what debugging type has been selected). This records the
4007 selected type. It is an error to specify more than one
4009 static enum debug_info_type selected_debug_type = NO_DEBUG;
4010 /* Non-zero if debugging format has been explicitly set.
4011 -g and -ggdb don't explicitly set the debugging format so
4012 -gdwarf -g3 is equivalent to -gdwarf3. */
4013 static int type_explicitly_set_p = 0;
4014 /* Indexed by enum debug_info_type. */
4015 static const char * debug_type_names[] =
4017 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4020 /* The maximum admissible debug level value. */
4021 static const unsigned max_debug_level = 3;
4023 /* Look up ARG in the table. */
4024 for (da = debug_args; da->arg; da++)
4026 const int da_len = strlen (da->arg);
4028 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4030 enum debug_info_type type = da->debug_type;
4031 const char * p = arg + da_len;
4033 if (*p && (*p < '0' || *p > '9'))
4036 /* A debug flag without a level defaults to level 2.
4037 Note we do not want to call read_integral_parameter
4038 for that case since it will call atoi which
4041 ??? We may want to generalize the interface to
4042 read_integral_parameter to better handle this case
4043 if this case shows up often. */
4045 level = read_integral_parameter (p, 0, max_debug_level + 1);
4049 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
4051 error ("use -gdwarf -g%d for DWARF v1, level %d",
4054 error ("use -gdwarf-2 for DWARF v2");
4057 if (level > max_debug_level)
4060 ignoring option `%s' due to invalid debug level specification",
4062 level = debug_info_level;
4065 if (type == NO_DEBUG)
4067 type = PREFERRED_DEBUGGING_TYPE;
4069 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
4071 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4072 type = DWARF2_DEBUG;
4074 #ifdef DBX_DEBUGGING_INFO
4081 if (type == NO_DEBUG)
4082 warning ("`%s': unknown or unsupported -g option", arg - 2);
4084 /* Does it conflict with an already selected type? */
4085 if (type_explicitly_set_p
4086 /* -g/-ggdb don't conflict with anything */
4087 && da->debug_type != NO_DEBUG
4088 && type != selected_debug_type)
4089 warning ("`%s' ignored, conflicts with `-g%s'",
4090 arg - 2, debug_type_names[(int) selected_debug_type]);
4093 /* If the format has already been set, -g/-ggdb
4094 only change the debug level. */
4095 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4096 ; /* don't change debugging type */
4099 selected_debug_type = type;
4100 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4103 write_symbols = (level == 0
4105 : selected_debug_type);
4106 use_gnu_debug_info_extensions = da->use_extensions_p;
4107 debug_info_level = (enum debug_info_level) level;
4115 warning ("`%s': unknown or unsupported -g option", arg - 2);
4120 /* Decode the first argument in the argv as a language-independent option.
4121 Return the number of strings consumed. 'strings_processed' is the
4122 number of strings that have already been decoded in a language
4123 specific fashion before this function was invoked. */
4126 independent_decode_option (argc, argv, strings_processed)
4129 unsigned int strings_processed;
4131 char *arg = argv[0];
4133 if (arg[0] != '-' || arg[1] == 0)
4145 if (!strcmp (arg, "-help"))
4160 /* Already been treated in main (). Do nothing. */
4164 set_target_switch (arg + 1);
4168 return decode_f_option (arg + 1);
4171 if (strings_processed == 0)
4172 return decode_g_option (arg + 1);
4174 return strings_processed;
4177 if (!strcmp (arg, "dumpbase"))
4182 dump_base_name = argv[1];
4186 decode_d_option (arg + 1);
4190 if (!strcmp (arg, "pedantic"))
4192 else if (!strcmp (arg, "pedantic-errors"))
4193 flag_pedantic_errors = pedantic = 1;
4194 else if (arg[1] == 0)
4201 if (!strcmp (arg, "quiet"))
4208 if (!strcmp (arg, "version"))
4216 inhibit_warnings = 1;
4225 /* We save the value of warn_uninitialized, since if they put
4226 -Wuninitialized on the command line, we need to generate a
4227 warning about not using it without also specifying -O. */
4228 if (warn_uninitialized != 1)
4229 warn_uninitialized = 2;
4232 return decode_W_option (arg + 1);
4238 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4239 warning ("`-a' option (basic block profile) not supported");
4241 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4244 else if (!strcmp (arg, "ax"))
4246 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4247 warning ("`-ax' option (jump profiling) not supported");
4249 profile_block_flag = (!profile_block_flag
4250 || profile_block_flag == 2) ? 2 : 3;
4253 else if (!strncmp (arg, "aux-info", 8))
4255 flag_gen_aux_info = 1;
4261 aux_info_file_name = argv[1];
4265 aux_info_file_name = arg + 8;
4277 asm_file_name = argv[1];
4292 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4297 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4301 if (g_switch_val == -1)
4305 g_switch_set = TRUE;
4306 g_switch_value = g_switch_val;
4316 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4317 Exit code is 35 if can't open files, 34 if fatal error,
4318 33 if had nonfatal errors, else success. */
4320 extern int main PARAMS ((int, char **));
4330 /* save in case md file wants to emit args as a comment. */
4334 p = argv[0] + strlen (argv[0]);
4335 while (p != argv[0] && p[-1] != '/'
4336 #ifdef DIR_SEPARATOR
4337 && p[-1] != DIR_SEPARATOR
4343 #ifdef HAVE_LC_MESSAGES
4344 setlocale (LC_MESSAGES, "");
4346 (void) bindtextdomain (PACKAGE, localedir);
4347 (void) textdomain (PACKAGE);
4349 signal (SIGFPE, float_signal);
4352 signal (SIGPIPE, pipe_closed);
4355 decl_printable_name = decl_name;
4356 lang_expand_expr = (lang_expand_expr_t) do_abort;
4358 /* Initialize whether `char' is signed. */
4359 flag_signed_char = DEFAULT_SIGNED_CHAR;
4360 #ifdef DEFAULT_SHORT_ENUMS
4361 /* Initialize how much space enums occupy, by default. */
4362 flag_short_enums = DEFAULT_SHORT_ENUMS;
4365 /* Initialize the garbage-collector. */
4367 ggc_add_root (&input_file_stack, 1, sizeof input_file_stack,
4369 ggc_add_rtx_root (&stack_limit_rtx, 1);
4370 ggc_add_tree_root (¤t_function_decl, 1);
4371 ggc_add_tree_root (¤t_function_func_begin_label, 1);
4373 /* Perform language-specific options intialization. */
4374 lang_init_options ();
4376 /* Scan to see what optimization level has been specified. That will
4377 determine the default value of many flags. */
4378 for (i = 1; i < argc; i++)
4380 if (!strcmp (argv[i], "-O"))
4385 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4387 /* Handle -Os, -O2, -O3, -O69, ... */
4388 char *p = &argv[i][2];
4390 if ((p[0] == 's') && (p[1] == 0))
4394 /* Optimizing for size forces optimize to be 2. */
4399 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4400 if (optimize_val != -1)
4402 optimize = optimize_val;
4412 flag_thread_jumps = 1;
4414 flag_delayed_branch = 1;
4416 #ifdef CAN_DEBUG_WITHOUT_FP
4417 flag_omit_frame_pointer = 1;
4423 flag_optimize_sibling_calls = 1;
4424 flag_cse_follow_jumps = 1;
4425 flag_cse_skip_blocks = 1;
4427 flag_expensive_optimizations = 1;
4428 flag_strength_reduce = 1;
4429 flag_rerun_cse_after_loop = 1;
4430 flag_rerun_loop_opt = 1;
4431 flag_caller_saves = 1;
4434 #ifdef INSN_SCHEDULING
4435 flag_schedule_insns = 1;
4436 flag_schedule_insns_after_reload = 1;
4439 flag_strict_aliasing = 1;
4440 flag_delete_null_pointer_checks = 1;
4445 flag_inline_functions = 1;
4448 if (optimize < 2 || optimize_size)
4453 align_functions = 1;
4456 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4459 set_target_switch ("");
4461 #ifdef OPTIMIZATION_OPTIONS
4462 /* Allow default optimizations to be specified on a per-machine basis. */
4463 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4466 /* Initialize register usage now so switches may override. */
4469 /* Perform normal command line switch decoding. */
4470 for (i = 1; i < argc;)
4472 unsigned int lang_processed;
4473 unsigned int indep_processed;
4475 /* Give the language a chance to decode the option for itself. */
4476 lang_processed = lang_decode_option (argc - i, argv + i);
4478 /* Now see if the option also has a language independent meaning.
4479 Some options are both language specific and language independent,
4480 eg --help. It is possible that there might be options that should
4481 only be decoded in a language independent way if they were not
4482 decoded in a langauge specific way, which is why 'lang_processed'
4484 indep_processed = independent_decode_option (argc - i, argv + i,
4487 if (lang_processed || indep_processed)
4488 i += (lang_processed > indep_processed
4489 ? lang_processed : indep_processed);
4492 const char * option = NULL;
4493 const char * lang = NULL;
4496 /* It is possible that the command line switch is not valid for the
4497 current language, but it is valid for another language. In order
4498 to be compatible with previous versions of the compiler (which
4499 did not issue an error message in this case) we check for this
4500 possibilty here. If we do find a match, then if extra_warnings
4501 is set we generate a warning message, otherwise we will just
4502 ignore the option. */
4503 for (j = 0; j < NUM_ELEM (documented_lang_options); j++)
4505 option = documented_lang_options[j].option;
4508 lang = documented_lang_options[j].description;
4509 else if (! strncmp (argv[i], option, strlen (option)))
4513 if (j != NUM_ELEM (documented_lang_options))
4517 warning ("Ignoring command line option '%s'", argv[i]);
4520 (It is valid for %s but not the selected langauge)", lang);
4524 error ("Unrecognized option `%s'", argv[i]);
4530 /* Checker uses the frame pointer. */
4531 if (flag_check_memory_usage)
4532 flag_omit_frame_pointer = 0;
4536 /* Inlining does not work if not optimizing,
4537 so force it not to be done. */
4541 /* The c_decode_option and lang_decode_option functions set
4542 this to `2' if -Wall is used, so we can avoid giving out
4543 lots of errors for people who don't realize what -Wall does. */
4544 if (warn_uninitialized == 1)
4545 warning ("-Wuninitialized is not supported without -O");
4548 #ifdef OVERRIDE_OPTIONS
4549 /* Some machines may reject certain combinations of options. */
4553 if (exceptions_via_longjmp == 2)
4555 #ifdef DWARF2_UNWIND_INFO
4556 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4558 exceptions_via_longjmp = 1;
4562 /* Set up the align_*_log variables, defaulting them to 1 if they
4563 were still unset. */
4564 if (align_loops <= 0) align_loops = 1;
4565 align_loops_log = floor_log2 (align_loops*2-1);
4566 if (align_jumps <= 0) align_jumps = 1;
4567 align_jumps_log = floor_log2 (align_jumps*2-1);
4568 if (align_labels <= 0) align_labels = 1;
4569 align_labels_log = floor_log2 (align_labels*2-1);
4570 if (align_functions <= 0) align_functions = 1;
4571 align_functions_log = floor_log2 (align_functions*2-1);
4573 if (profile_block_flag == 3)
4575 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4576 profile_block_flag = 2;
4579 /* Unrolling all loops implies that standard loop unrolling must also
4581 if (flag_unroll_all_loops)
4582 flag_unroll_loops = 1;
4583 /* Loop unrolling requires that strength_reduction be on also. Silently
4584 turn on strength reduction here if it isn't already on. Also, the loop
4585 unrolling code assumes that cse will be run after loop, so that must
4586 be turned on also. */
4587 if (flag_unroll_loops)
4589 flag_strength_reduce = 1;
4590 flag_rerun_cse_after_loop = 1;
4593 /* Warn about options that are not supported on this machine. */
4594 #ifndef INSN_SCHEDULING
4595 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4596 warning ("instruction scheduling not supported on this target machine");
4599 if (flag_delayed_branch)
4600 warning ("this target machine does not have delayed branches");
4603 user_label_prefix = USER_LABEL_PREFIX;
4604 if (flag_leading_underscore != -1)
4606 /* If the default prefix is more complicated than "" or "_",
4607 issue a warning and ignore this option. */
4608 if (user_label_prefix[0] == 0 ||
4609 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4611 user_label_prefix = flag_leading_underscore ? "_" : "";
4614 warning ("-f%sleading-underscore not supported on this target machine",
4615 flag_leading_underscore ? "" : "no-");
4618 /* If we are in verbose mode, write out the version and maybe all the
4619 option flags in use. */
4622 print_version (stderr, "");
4624 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4627 compile_file (filename);
4629 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4632 char *lim = (char *) sbrk (0);
4634 fnotice (stderr, "Data size %ld.\n", (long) (lim - (char *) &environ));
4639 system ("ps -l 1>&2");
4642 #endif /* not USG */
4645 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4648 return (FATAL_EXIT_CODE);
4650 return (FATAL_EXIT_CODE);
4651 return (SUCCESS_EXIT_CODE);
4654 /* Decode -m switches. */
4655 /* Decode the switch -mNAME. */
4658 set_target_switch (name)
4662 int valid_target_option = 0;
4664 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4665 if (!strcmp (target_switches[j].name, name))
4667 if (target_switches[j].value < 0)
4668 target_flags &= ~-target_switches[j].value;
4670 target_flags |= target_switches[j].value;
4671 valid_target_option = 1;
4674 #ifdef TARGET_OPTIONS
4675 if (!valid_target_option)
4676 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4678 int len = strlen (target_options[j].prefix);
4679 if (!strncmp (target_options[j].prefix, name, len))
4681 *target_options[j].variable = name + len;
4682 valid_target_option = 1;
4687 if (!valid_target_option)
4688 error ("Invalid option `%s'", name);
4691 /* Print version information to FILE.
4692 Each line begins with INDENT (for the case where FILE is the
4693 assembler output file). */
4696 print_version (file, indent)
4701 #define __VERSION__ "[?]"
4705 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4707 "%s%s%s version %s (%s) compiled by CC.\n"
4709 , indent, *indent != 0 ? " " : "",
4710 language_string, version_string, TARGET_NAME, __VERSION__);
4713 /* Print an option value and return the adjusted position in the line.
4714 ??? We don't handle error returns from fprintf (disk full); presumably
4715 other code will catch a disk full though. */
4718 print_single_switch (file, pos, max, indent, sep, term, type, name)
4721 const char *indent, *sep, *term, *type, *name;
4723 /* The ultrix fprintf returns 0 on success, so compute the result we want
4724 here since we need it for the following test. */
4725 int len = strlen (sep) + strlen (type) + strlen (name);
4730 fprintf (file, "%s", term);
4735 fprintf (file, "%s", indent);
4736 pos = strlen (indent);
4738 fprintf (file, "%s%s%s", sep, type, name);
4743 /* Print active target switches to FILE.
4744 POS is the current cursor position and MAX is the size of a "line".
4745 Each line begins with INDENT and ends with TERM.
4746 Each switch is separated from the next by SEP. */
4749 print_switch_values (file, pos, max, indent, sep, term)
4752 const char *indent, *sep, *term;
4757 /* Print the options as passed. */
4759 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4760 _("options passed: "), "");
4762 for (p = &save_argv[1]; *p != NULL; p++)
4766 if (strcmp (*p, "-o") == 0)
4772 if (strcmp (*p, "-quiet") == 0)
4774 if (strcmp (*p, "-version") == 0)
4779 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4782 fprintf (file, "%s", term);
4784 /* Print the -f and -m options that have been enabled.
4785 We don't handle language specific options but printing argv
4788 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4789 _("options enabled: "), "");
4791 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
4792 if (*f_options[j].variable == f_options[j].on_value)
4793 pos = print_single_switch (file, pos, max, indent, sep, term,
4794 "-f", f_options[j].string);
4796 /* Print target specific options. */
4798 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4799 if (target_switches[j].name[0] != '\0'
4800 && target_switches[j].value > 0
4801 && ((target_switches[j].value & target_flags)
4802 == target_switches[j].value))
4804 pos = print_single_switch (file, pos, max, indent, sep, term,
4805 "-m", target_switches[j].name);
4808 #ifdef TARGET_OPTIONS
4809 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4810 if (*target_options[j].variable != NULL)
4813 sprintf (prefix, "-m%s", target_options[j].prefix);
4814 pos = print_single_switch (file, pos, max, indent, sep, term,
4815 prefix, *target_options[j].variable);
4819 fprintf (file, "%s", term);
4822 /* Record the beginning of a new source file, named FILENAME. */
4825 debug_start_source_file (filename)
4826 register char *filename ATTRIBUTE_UNUSED;
4828 #ifdef DBX_DEBUGGING_INFO
4829 if (write_symbols == DBX_DEBUG)
4830 dbxout_start_new_source_file (filename);
4832 #ifdef DWARF_DEBUGGING_INFO
4833 if (debug_info_level == DINFO_LEVEL_VERBOSE
4834 && write_symbols == DWARF_DEBUG)
4835 dwarfout_start_new_source_file (filename);
4836 #endif /* DWARF_DEBUGGING_INFO */
4837 #ifdef DWARF2_DEBUGGING_INFO
4838 if (debug_info_level == DINFO_LEVEL_VERBOSE
4839 && write_symbols == DWARF2_DEBUG)
4840 dwarf2out_start_source_file (filename);
4841 #endif /* DWARF2_DEBUGGING_INFO */
4842 #ifdef SDB_DEBUGGING_INFO
4843 if (write_symbols == SDB_DEBUG)
4844 sdbout_start_new_source_file (filename);
4848 /* Record the resumption of a source file. LINENO is the line number in
4849 the source file we are returning to. */
4852 debug_end_source_file (lineno)
4853 register unsigned lineno ATTRIBUTE_UNUSED;
4855 #ifdef DBX_DEBUGGING_INFO
4856 if (write_symbols == DBX_DEBUG)
4857 dbxout_resume_previous_source_file ();
4859 #ifdef DWARF_DEBUGGING_INFO
4860 if (debug_info_level == DINFO_LEVEL_VERBOSE
4861 && write_symbols == DWARF_DEBUG)
4862 dwarfout_resume_previous_source_file (lineno);
4863 #endif /* DWARF_DEBUGGING_INFO */
4864 #ifdef DWARF2_DEBUGGING_INFO
4865 if (debug_info_level == DINFO_LEVEL_VERBOSE
4866 && write_symbols == DWARF2_DEBUG)
4867 dwarf2out_end_source_file ();
4868 #endif /* DWARF2_DEBUGGING_INFO */
4869 #ifdef SDB_DEBUGGING_INFO
4870 if (write_symbols == SDB_DEBUG)
4871 sdbout_resume_previous_source_file ();
4875 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4876 the tail part of the directive line, i.e. the part which is past the
4877 initial whitespace, #, whitespace, directive-name, whitespace part. */
4880 debug_define (lineno, buffer)
4881 register unsigned lineno ATTRIBUTE_UNUSED;
4882 register char *buffer ATTRIBUTE_UNUSED;
4884 #ifdef DWARF_DEBUGGING_INFO
4885 if (debug_info_level == DINFO_LEVEL_VERBOSE
4886 && write_symbols == DWARF_DEBUG)
4887 dwarfout_define (lineno, buffer);
4888 #endif /* DWARF_DEBUGGING_INFO */
4889 #ifdef DWARF2_DEBUGGING_INFO
4890 if (debug_info_level == DINFO_LEVEL_VERBOSE
4891 && write_symbols == DWARF2_DEBUG)
4892 dwarf2out_define (lineno, buffer);
4893 #endif /* DWARF2_DEBUGGING_INFO */
4896 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
4897 the tail part of the directive line, i.e. the part which is past the
4898 initial whitespace, #, whitespace, directive-name, whitespace part. */
4901 debug_undef (lineno, buffer)
4902 register unsigned lineno ATTRIBUTE_UNUSED;
4903 register char *buffer ATTRIBUTE_UNUSED;
4905 #ifdef DWARF_DEBUGGING_INFO
4906 if (debug_info_level == DINFO_LEVEL_VERBOSE
4907 && write_symbols == DWARF_DEBUG)
4908 dwarfout_undef (lineno, buffer);
4909 #endif /* DWARF_DEBUGGING_INFO */
4910 #ifdef DWARF2_DEBUGGING_INFO
4911 if (debug_info_level == DINFO_LEVEL_VERBOSE
4912 && write_symbols == DWARF2_DEBUG)
4913 dwarf2out_undef (lineno, buffer);
4914 #endif /* DWARF2_DEBUGGING_INFO */
4917 /* Tell the debugging backend that we've decided not to emit any
4918 debugging information for BLOCK, so it can clean up after any local
4919 classes or nested functions. */
4922 debug_ignore_block (block)
4923 tree block ATTRIBUTE_UNUSED;
4925 #ifdef DWARF2_DEBUGGING_INFO
4926 if (write_symbols == DWARF2_DEBUG)
4927 dwarf2out_ignore_block (block);