1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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-config.h"
49 #include "hard-reg-set.h"
56 #include "basic-block.h"
63 #include "diagnostic.h"
67 #include "dwarf2asm.h"
68 #include "integrate.h"
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
85 #include "xcoffout.h" /* Needed for external data
86 declarations for e.g. AIX 4.x. */
90 /* The extra parameters substantially improve the I/O performance. */
93 vms_fopen (fname, type)
97 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
98 fixed arguments, which matches ANSI's specification but not VAXCRTL's
99 pre-ANSI implementation. This hack circumvents the mismatch problem. */
100 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
103 return (*vmslib_fopen) (fname, type, "mbc=32",
104 "deq=64", "fop=tef", "shr=nil");
106 return (*vmslib_fopen) (fname, type, "mbc=32");
109 #define fopen vms_fopen
112 #ifndef DEFAULT_GDB_EXTENSIONS
113 #define DEFAULT_GDB_EXTENSIONS 1
116 /* If more than one debugging type is supported, you must define
117 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
119 This is one long line cause VAXC can't handle a \-newline. */
120 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
121 #ifndef PREFERRED_DEBUGGING_TYPE
122 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
123 #endif /* no PREFERRED_DEBUGGING_TYPE */
124 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
125 so the following code needn't care. */
126 #ifdef DBX_DEBUGGING_INFO
127 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
129 #ifdef SDB_DEBUGGING_INFO
130 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
132 #ifdef DWARF_DEBUGGING_INFO
133 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
135 #ifdef DWARF2_DEBUGGING_INFO
136 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
138 #ifdef XCOFF_DEBUGGING_INFO
139 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
141 #endif /* More than one debugger format enabled. */
143 /* If still not defined, must have been because no debugging formats
145 #ifndef PREFERRED_DEBUGGING_TYPE
146 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
149 #if defined (HAVE_DECL_ENVIRON) && !HAVE_DECL_ENVIRON
150 extern char **environ;
153 /* Carry information from ASM_DECLARE_OBJECT_NAME
154 to ASM_FINISH_DECLARE_OBJECT. */
156 extern int size_directive_output;
157 extern tree last_assemble_variable_decl;
159 static void set_target_switch PARAMS ((const char *));
160 static const char *decl_name PARAMS ((tree, int));
162 static void float_signal PARAMS ((int)) ATTRIBUTE_NORETURN;
163 static void crash_signal PARAMS ((int)) ATTRIBUTE_NORETURN;
164 static void set_float_handler PARAMS ((jmp_buf));
165 static void compile_file PARAMS ((const char *));
166 static void display_help PARAMS ((void));
167 static void display_target_options 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 **));
175 static void print_version PARAMS ((FILE *, const char *));
176 static int print_single_switch PARAMS ((FILE *, int, int, const char *,
177 const char *, const char *,
178 const char *, const char *));
179 static void print_switch_values PARAMS ((FILE *, int, int, const char *,
180 const char *, const char *));
182 /* Length of line when printing switch values. */
185 /* Name of program invoked, sans directories. */
187 const char *progname;
189 /* Copy of arguments to toplev_main. */
193 /* Name of current original source file (what was input to cpp).
194 This comes from each #-command in the actual input. */
196 const char *input_filename;
198 /* Name of top-level original source file (what was input to cpp).
199 This comes from the #-command at the beginning of the actual input.
200 If there isn't any there, then this is the cc1 input file name. */
202 const char *main_input_filename;
204 /* Current line number in real source file. */
208 /* Nonzero if it is unsafe to create any new pseudo registers. */
211 /* Stack of currently pending input files. */
213 struct file_stack *input_file_stack;
215 /* Incremented on each change to input_file_stack. */
216 int input_file_stack_tick;
218 /* Name to use as base of names for dump output files. */
220 const char *dump_base_name;
222 /* Bit flags that specify the machine subtype we are compiling for.
223 Bits are tested using macros TARGET_... defined in the tm.h file
224 and set by `-m...' switches. Must be defined in rtlanal.c. */
226 extern int target_flags;
228 /* Debug hooks - dependent upon command line options. */
230 struct gcc_debug_hooks *debug_hooks;
232 /* Describes a dump file. */
234 struct dump_file_info
236 /* The unique extension to apply, e.g. ".jump". */
237 const char *const extension;
239 /* The -d<c> character that enables this dump file. */
240 char const debug_switch;
242 /* True if there is a corresponding graph dump file. */
243 char const graph_dump_p;
245 /* True if the user selected this dump. */
248 /* True if the files have been initialized (ie truncated). */
252 /* Enumerate the extant dump files. */
291 /* Describes all the dump files. Should be kept in order of the
292 pass and in sync with dump_file_index above.
294 Remaining -d letters:
300 struct dump_file_info dump_file[DFI_MAX] =
302 { "rtl", 'r', 0, 0, 0 },
303 { "sibling", 'i', 0, 0, 0 },
304 { "eh", 'h', 0, 0, 0 },
305 { "jump", 'j', 0, 0, 0 },
306 { "ssa", 'e', 1, 0, 0 },
307 { "ssaccp", 'W', 1, 0, 0 },
308 { "ssadce", 'X', 1, 0, 0 },
309 { "ussa", 'e', 1, 0, 0 }, /* Yes, duplicate enable switch. */
310 { "cse", 's', 0, 0, 0 },
311 { "addressof", 'F', 0, 0, 0 },
312 { "gcse", 'G', 1, 0, 0 },
313 { "loop", 'L', 1, 0, 0 },
314 { "cse2", 't', 1, 0, 0 },
315 { "cfg", 'f', 1, 0, 0 },
316 { "bp", 'b', 1, 0, 0 },
317 { "life", 'f', 1, 0, 0 }, /* Yes, duplicate enable switch. */
318 { "combine", 'c', 1, 0, 0 },
319 { "ce", 'C', 1, 0, 0 },
320 { "regmove", 'N', 1, 0, 0 },
321 { "sched", 'S', 1, 0, 0 },
322 { "lreg", 'l', 1, 0, 0 },
323 { "greg", 'g', 1, 0, 0 },
324 { "postreload", 'o', 1, 0, 0 },
325 { "flow2", 'w', 1, 0, 0 },
326 { "peephole2", 'z', 1, 0, 0 },
327 { "rnreg", 'n', 1, 0, 0 },
328 { "ce2", 'E', 1, 0, 0 },
329 { "sched2", 'R', 1, 0, 0 },
330 { "stack", 'k', 1, 0, 0 },
331 { "bbro", 'B', 1, 0, 0 },
332 { "mach", 'M', 1, 0, 0 },
333 { "dbr", 'd', 0, 0, 0 },
336 static int open_dump_file PARAMS ((enum dump_file_index, tree));
337 static void close_dump_file PARAMS ((enum dump_file_index,
338 void (*) (FILE *, rtx), rtx));
340 /* Other flags saying which kinds of debugging dump have been requested. */
342 int rtl_dump_and_exit;
343 int flag_print_asm_name;
344 static int version_flag;
345 static char *filename;
346 enum graph_dump_types graph_dump_format;
348 /* Name for output file of assembly code, specified with -o. */
352 /* Value of the -G xx switch, and whether it was passed or not. */
356 /* Type(s) of debugging information we are producing (if any).
357 See flags.h for the definitions of the different possible
358 types of debugging information. */
359 enum debug_info_type write_symbols = NO_DEBUG;
361 /* Level of debugging information we are producing. See flags.h
362 for the definitions of the different possible levels. */
363 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
365 /* Nonzero means use GNU-only extensions in the generated symbolic
366 debugging information. */
367 /* Currently, this only has an effect when write_symbols is set to
368 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
369 int use_gnu_debug_info_extensions = 0;
371 /* Nonzero means do optimizations. -O.
372 Particular numeric values stand for particular amounts of optimization;
373 thus, -O2 stores 2 here. However, the optimizations beyond the basic
374 ones are not controlled directly by this variable. Instead, they are
375 controlled by individual `flag_...' variables that are defaulted
376 based on this variable. */
380 /* Nonzero means optimize for size. -Os.
381 The only valid values are zero and non-zero. When optimize_size is
382 non-zero, optimize defaults to 2, but certain individual code
383 bloating optimizations are disabled. */
385 int optimize_size = 0;
387 /* Nonzero if we should exit after parsing options. */
388 static int exit_after_options = 0;
390 /* The FUNCTION_DECL for the function currently being compiled,
391 or 0 if between functions. */
392 tree current_function_decl;
394 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
396 tree current_function_func_begin_label;
398 /* Pointer to function to compute the name to use to print a declaration.
399 DECL is the declaration in question.
400 VERBOSITY determines what information will be printed:
401 0: DECL_NAME, demangled as necessary.
402 1: and scope information.
403 2: and any other information that might be interesting, such as function
404 parameter types in C++. */
406 const char *(*decl_printable_name) PARAMS ((tree, int));
408 /* Pointer to function to compute rtl for a language-specific tree code. */
410 typedef rtx (*lang_expand_expr_t)
411 PARAMS ((union tree_node *, rtx, enum machine_mode,
412 enum expand_modifier modifier));
414 lang_expand_expr_t lang_expand_expr = 0;
416 tree (*lang_expand_constant) PARAMS ((tree)) = 0;
418 /* Pointer to function to finish handling an incomplete decl at the
419 end of compilation. */
421 void (*incomplete_decl_finalize_hook) PARAMS ((tree)) = 0;
423 /* Nonzero if doing dwarf2 duplicate elimination. */
425 int flag_eliminate_dwarf2_dups = 0;
427 /* Nonzero if generating code to do profiling. */
429 int profile_flag = 0;
431 /* Nonzero if generating code to do profiling on a line-by-line basis. */
433 int profile_block_flag;
435 /* Nonzero if generating code to profile program flow graph arcs. */
437 int profile_arc_flag = 0;
439 /* Nonzero if generating info for gcov to calculate line test coverage. */
441 int flag_test_coverage = 0;
443 /* Nonzero indicates that branch taken probabilities should be calculated. */
445 int flag_branch_probabilities = 0;
447 /* Nonzero if basic blocks should be reordered. */
449 int flag_reorder_blocks = 0;
451 /* Nonzero if registers should be renamed. */
453 int flag_rename_registers = 0;
455 /* Nonzero for -pedantic switch: warn about anything
456 that standard spec forbids. */
460 /* Temporarily suppress certain warnings.
461 This is set while reading code from a system header file. */
463 int in_system_header = 0;
465 /* Don't print functions as they are compiled. -quiet. */
469 /* Print times taken by the various passes. -ftime-report. */
473 /* Print memory still in use at end of compilation (which may have little
474 to do with peak memory consumption). -fmem-report. */
478 /* Non-zero means to collect statistics which might be expensive
479 and to print them when we are done. */
480 int flag_detailed_statistics = 0;
485 /* Nonzero means `char' should be signed. */
487 int flag_signed_char;
489 /* Nonzero means give an enum type only as many bytes as it needs. */
491 int flag_short_enums;
493 /* Nonzero for -fcaller-saves: allocate values in regs that need to
494 be saved across function calls, if that produces overall better code.
495 Optional now, so people can test it. */
497 #ifdef DEFAULT_CALLER_SAVES
498 int flag_caller_saves = 1;
500 int flag_caller_saves = 0;
503 /* Nonzero if structures and unions should be returned in memory.
505 This should only be defined if compatibility with another compiler or
506 with an ABI is needed, because it results in slower code. */
508 #ifndef DEFAULT_PCC_STRUCT_RETURN
509 #define DEFAULT_PCC_STRUCT_RETURN 1
512 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
514 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
516 /* Nonzero for -fforce-mem: load memory value into a register
517 before arithmetic on it. This makes better cse but slower compilation. */
519 int flag_force_mem = 0;
521 /* Nonzero for -fforce-addr: load memory address into a register before
522 reference to memory. This makes better cse but slower compilation. */
524 int flag_force_addr = 0;
526 /* Nonzero for -fdefer-pop: don't pop args after each function call;
527 instead save them up to pop many calls' args with one insns. */
529 int flag_defer_pop = 0;
531 /* Nonzero for -ffloat-store: don't allocate floats and doubles
532 in extended-precision registers. */
534 int flag_float_store = 0;
536 /* Nonzero for -fcse-follow-jumps:
537 have cse follow jumps to do a more extensive job. */
539 int flag_cse_follow_jumps;
541 /* Nonzero for -fcse-skip-blocks:
542 have cse follow a branch around a block. */
543 int flag_cse_skip_blocks;
545 /* Nonzero for -fexpensive-optimizations:
546 perform miscellaneous relatively-expensive optimizations. */
547 int flag_expensive_optimizations;
549 /* Nonzero for -fthread-jumps:
550 have jump optimize output of loop. */
552 int flag_thread_jumps;
554 /* Nonzero enables strength-reduction in loop.c. */
556 int flag_strength_reduce = 0;
558 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
559 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
560 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
563 int flag_unroll_loops;
565 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
566 This is generally not a win. */
568 int flag_unroll_all_loops;
570 /* Nonzero forces all invariant computations in loops to be moved
573 int flag_move_all_movables = 0;
575 /* Nonzero forces all general induction variables in loops to be
578 int flag_reduce_all_givs = 0;
580 /* Nonzero to perform full register move optimization passes. This is the
583 int flag_regmove = 0;
585 /* Nonzero for -fwritable-strings:
586 store string constants in data segment and don't uniquize them. */
588 int flag_writable_strings = 0;
590 /* Nonzero means don't put addresses of constant functions in registers.
591 Used for compiling the Unix kernel, where strange substitutions are
592 done on the assembly output. */
594 int flag_no_function_cse = 0;
596 /* Nonzero for -fomit-frame-pointer:
597 don't make a frame pointer in simple functions that don't require one. */
599 int flag_omit_frame_pointer = 0;
601 /* Nonzero means place each function into its own section on those platforms
602 which support arbitrary section names and unlimited numbers of sections. */
604 int flag_function_sections = 0;
606 /* ... and similar for data. */
608 int flag_data_sections = 0;
610 /* Nonzero to inhibit use of define_optimization peephole opts. */
612 int flag_no_peephole = 0;
614 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
616 int flag_optimize_sibling_calls = 0;
618 /* Nonzero means the front end generally wants `errno' maintained by math
619 operations, like built-in SQRT. */
621 int flag_errno_math = 1;
623 /* Nonzero means that unsafe floating-point math optimizations are allowed
624 for the sake of speed. IEEE compliance is not guaranteed, and operations
625 are allowed to assume that their arguments and results are "normal"
626 (e.g., nonnegative for SQRT). */
628 int flag_unsafe_math_optimizations = 0;
630 /* Zero means that floating-point math operations cannot generate a
631 (user-visible) trap. This is the case, for example, in nonstop
632 IEEE 754 arithmetic. */
634 int flag_trapping_math = 1;
636 /* 0 means straightforward implementation of complex divide acceptable.
637 1 means wide ranges of inputs must work for complex divide.
638 2 means C99-like requirements for complex divide (not yet implemented). */
640 int flag_complex_divide_method = 0;
642 /* Nonzero means all references through pointers are volatile. */
646 /* Nonzero means treat all global and extern variables as volatile. */
648 int flag_volatile_global;
650 /* Nonzero means treat all static variables as volatile. */
652 int flag_volatile_static;
654 /* Nonzero means just do syntax checking; don't output anything. */
656 int flag_syntax_only = 0;
658 /* Nonzero means perform global cse. */
660 static int flag_gcse;
662 /* Nonzero means to use global dataflow analysis to eliminate
663 useless null pointer tests. */
665 static int flag_delete_null_pointer_checks;
667 /* Nonzero means to do the enhanced load motion during gcse, which trys
668 to hoist loads by not killing them when a store to the same location
671 int flag_gcse_lm = 1;
673 /* Nonzero means to perform store motion after gcse, which will try to
674 move stores closer to the exit block. Its not very effective without
677 int flag_gcse_sm = 1;
679 /* Nonzero means to rerun cse after loop optimization. This increases
680 compilation time about 20% and picks up a few more common expressions. */
682 static int flag_rerun_cse_after_loop;
684 /* Nonzero means to run loop optimizations twice. */
686 int flag_rerun_loop_opt;
688 /* Nonzero for -finline-functions: ok to inline functions that look like
689 good inline candidates. */
691 int flag_inline_functions;
693 /* Nonzero for -fkeep-inline-functions: even if we make a function
694 go inline everywhere, keep its definition around for debugging
697 int flag_keep_inline_functions;
699 /* Nonzero means that functions will not be inlined. */
703 /* Nonzero means that we should emit static const variables
704 regardless of whether or not optimization is turned on. */
706 int flag_keep_static_consts = 1;
708 /* Nonzero means we should be saving declaration info into a .X file. */
710 int flag_gen_aux_info = 0;
712 /* Specified name of aux-info file. */
714 static char *aux_info_file_name;
716 /* Nonzero means make the text shared if supported. */
718 int flag_shared_data;
720 /* Nonzero means schedule into delayed branch slots if supported. */
722 int flag_delayed_branch;
724 /* Nonzero if we are compiling pure (sharable) code.
725 Value is 1 if we are doing reasonable (i.e. simple
726 offset into offset table) pic. Value is 2 if we can
727 only perform register offsets. */
731 /* Nonzero means generate extra code for exception handling and enable
732 exception handling. */
736 /* Nonzero means generate frame unwind info table when supported. */
738 int flag_unwind_tables = 0;
740 /* Nonzero means generate frame unwind info table exact at each insn boundary */
742 int flag_asynchronous_unwind_tables = 0;
744 /* Nonzero means don't place uninitialized global data in common storage
749 /* Nonzero means pretend it is OK to examine bits of target floats,
750 even if that isn't true. The resulting code will have incorrect constants,
751 but the same series of instructions that the native compiler would make. */
753 int flag_pretend_float;
755 /* Nonzero means change certain warnings into errors.
756 Usually these are warnings about failure to conform to some standard. */
758 int flag_pedantic_errors = 0;
760 /* flag_schedule_insns means schedule insns within basic blocks (before
762 flag_schedule_insns_after_reload means schedule insns after
765 int flag_schedule_insns = 0;
766 int flag_schedule_insns_after_reload = 0;
768 /* The following flags have effect only for scheduling before register
771 flag_schedule_interblock means schedule insns accross basic blocks.
772 flag_schedule_speculative means allow speculative motion of non-load insns.
773 flag_schedule_speculative_load means allow speculative motion of some
775 flag_schedule_speculative_load_dangerous allows speculative motion of more
778 int flag_schedule_interblock = 1;
779 int flag_schedule_speculative = 1;
780 int flag_schedule_speculative_load = 0;
781 int flag_schedule_speculative_load_dangerous = 0;
783 int flag_single_precision_constant;
785 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
786 by a cheaper branch on a count register. */
787 int flag_branch_on_count_reg = 1;
789 /* -finhibit-size-directive inhibits output of .size for ELF.
790 This is used only for compiling crtstuff.c,
791 and it may be extended to other effects
792 needed for crtstuff.c on other systems. */
793 int flag_inhibit_size_directive = 0;
795 /* -fverbose-asm causes extra commentary information to be produced in
796 the generated assembly code (to make it more readable). This option
797 is generally only of use to those who actually need to read the
798 generated assembly code (perhaps while debugging the compiler itself).
799 -fno-verbose-asm, the default, causes the extra information
800 to be omitted and is useful when comparing two assembler files. */
802 int flag_verbose_asm = 0;
804 /* -dA causes debug commentary information to be produced in
805 the generated assembly code (to make it more readable). This option
806 is generally only of use to those who actually need to read the
807 generated assembly code (perhaps while debugging the compiler itself).
808 Currently, this switch is only used by dwarfout.c; however, it is intended
809 to be a catchall for printing debug information in the assembler file. */
811 int flag_debug_asm = 0;
813 /* -dP causes the rtl to be emitted as a comment in assembly. */
815 int flag_dump_rtl_in_asm = 0;
817 /* -fgnu-linker specifies use of the GNU linker for initializations.
818 (Or, more generally, a linker that handles initializations.)
819 -fno-gnu-linker says that collect2 will be used. */
821 int flag_gnu_linker = 0;
823 int flag_gnu_linker = 1;
829 /* Enable ssa conditional constant propagation. */
830 int flag_ssa_ccp = 0;
832 /* Enable ssa aggressive dead code elimination. */
833 int flag_ssa_dce = 0;
835 /* Tag all structures with __attribute__(packed). */
836 int flag_pack_struct = 0;
838 /* Emit code to check for stack overflow; also may cause large objects
839 to be allocated dynamically. */
840 int flag_stack_check;
842 /* When non-NULL, indicates that whenever space is allocated on the
843 stack, the resulting stack pointer must not pass this
844 address---that is, for stacks that grow downward, the stack pointer
845 must always be greater than or equal to this address; for stacks
846 that grow upward, the stack pointer must be less than this address.
847 At present, the rtx may be either a REG or a SYMBOL_REF, although
848 the support provided depends on the backend. */
851 /* -fcheck-memory-usage causes extra code to be generated in order to check
852 memory accesses. This is used by a detector of bad memory accesses such
854 int flag_check_memory_usage = 0;
856 /* -fprefix-function-name causes function name to be prefixed. This
857 can be used with -fcheck-memory-usage to isolate code compiled with
858 -fcheck-memory-usage. */
859 int flag_prefix_function_name = 0;
861 /* 0 if pointer arguments may alias each other. True in C.
862 1 if pointer arguments may not alias each other but may alias
864 2 if pointer arguments may not alias each other and may not
865 alias global variables. True in Fortran.
866 This defaults to 0 for C. */
867 int flag_argument_noalias = 0;
869 /* Nonzero if we should do (language-dependent) alias analysis.
870 Typically, this analysis will assume that expressions of certain
871 types do not alias expressions of certain other types. Only used
872 if alias analysis (in general) is enabled. */
873 int flag_strict_aliasing = 0;
875 /* Instrument functions with calls at entry and exit, for profiling. */
876 int flag_instrument_function_entry_exit = 0;
878 /* Nonzero means ignore `#ident' directives. 0 means handle them.
879 On SVR4 targets, it also controls whether or not to emit a
880 string identifying the compiler. */
882 int flag_no_ident = 0;
884 /* This will perform a peephole pass before sched2. */
885 int flag_peephole2 = 0;
887 /* This will try to guess branch probabilities. */
888 int flag_guess_branch_prob = 0;
890 /* -fbounded-pointers causes gcc to compile pointers as composite
891 objects occupying three words: the pointer value, the base address
892 of the referent object, and the address immediately beyond the end
893 of the referent object. The base and extent allow us to perform
894 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
895 int flag_bounded_pointers = 0;
897 /* -fcheck-bounds causes gcc to generate array bounds checks.
898 For C, C++: defaults to value of flag_bounded_pointers.
899 For ObjC: defaults to off.
900 For Java: defaults to on.
901 For Fortran: defaults to off.
902 For CHILL: defaults to off. */
903 int flag_bounds_check = 0;
905 /* This will attempt to merge constant section constants, if 1 only
906 string constants and constants from constant pool, if 2 also constant
908 int flag_merge_constants = 1;
910 /* If one, renumber instruction UIDs to reduce the number of
911 unused UIDs if there are a lot of instructions. If greater than
912 one, unconditionally renumber instruction UIDs. */
913 int flag_renumber_insns = 1;
915 /* Values of the -falign-* flags: how much to align labels in code.
916 0 means `use default', 1 means `don't align'.
917 For each variable, there is an _log variant which is the power
918 of two not less than the variable, for .align output. */
925 int align_labels_log;
927 int align_functions_log;
929 /* Table of supported debugging formats. */
932 const char *const arg;
933 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
934 constant expression, we use NO_DEBUG in its place. */
935 const enum debug_info_type debug_type;
936 const int use_extensions_p;
937 const char *const description;
941 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
942 N_("Generate debugging info in default format") },
943 { "gdb", NO_DEBUG, 1, N_("Generate debugging info in default extended format") },
944 #ifdef DBX_DEBUGGING_INFO
945 { "stabs", DBX_DEBUG, 0, N_("Generate STABS format debug info") },
946 { "stabs+", DBX_DEBUG, 1, N_("Generate extended STABS format debug info") },
948 #ifdef DWARF_DEBUGGING_INFO
949 { "dwarf", DWARF_DEBUG, 0, N_("Generate DWARF-1 format debug info") },
950 { "dwarf+", DWARF_DEBUG, 1,
951 N_("Generate extended DWARF-1 format debug info") },
953 #ifdef DWARF2_DEBUGGING_INFO
954 { "dwarf-2", DWARF2_DEBUG, 0, N_("Generate DWARF-2 debug info") },
956 #ifdef XCOFF_DEBUGGING_INFO
957 { "xcoff", XCOFF_DEBUG, 0, N_("Generate XCOFF format debug info") },
958 { "xcoff+", XCOFF_DEBUG, 1, N_("Generate extended XCOFF format debug info") },
960 #ifdef SDB_DEBUGGING_INFO
961 { "coff", SDB_DEBUG, 0, N_("Generate COFF format debug info") },
971 const char *description;
973 lang_independent_options;
977 /* Add or remove a leading underscore from user symbols. */
978 int flag_leading_underscore = -1;
980 /* The user symbol prefix after having resolved same. */
981 const char *user_label_prefix;
983 static const param_info lang_independent_params[] = {
984 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \
985 { OPTION, DEFAULT, HELP },
986 #include "params.def"
991 /* A default for same. */
992 #ifndef USER_LABEL_PREFIX
993 #define USER_LABEL_PREFIX ""
996 /* Table of language-independent -f options.
997 STRING is the option name. VARIABLE is the address of the variable.
998 ON_VALUE is the value to store in VARIABLE
999 if `-fSTRING' is seen as an option.
1000 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
1002 lang_independent_options f_options[] =
1004 {"eliminate-dwarf2-dups", &flag_eliminate_dwarf2_dups, 1,
1005 N_("Perform DWARF2 duplicate elimination") },
1006 {"float-store", &flag_float_store, 1,
1007 N_("Do not store floats in registers") },
1008 {"volatile", &flag_volatile, 1,
1009 N_("Consider all mem refs through pointers as volatile") },
1010 {"volatile-global", &flag_volatile_global, 1,
1011 N_("Consider all mem refs to global data to be volatile") },
1012 {"volatile-static", &flag_volatile_static, 1,
1013 N_("Consider all mem refs to static data to be volatile") },
1014 {"defer-pop", &flag_defer_pop, 1,
1015 N_("Defer popping functions args from stack until later") },
1016 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
1017 N_("When possible do not generate stack frames") },
1018 {"optimize-sibling-calls", &flag_optimize_sibling_calls, 1,
1019 N_("Optimize sibling and tail recursive calls") },
1020 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
1021 N_("When running CSE, follow jumps to their targets") },
1022 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
1023 N_("When running CSE, follow conditional jumps") },
1024 {"expensive-optimizations", &flag_expensive_optimizations, 1,
1025 N_("Perform a number of minor, expensive optimisations") },
1026 {"thread-jumps", &flag_thread_jumps, 1,
1027 N_("Perform jump threading optimisations") },
1028 {"strength-reduce", &flag_strength_reduce, 1,
1029 N_("Perform strength reduction optimisations") },
1030 {"unroll-loops", &flag_unroll_loops, 1,
1031 N_("Perform loop unrolling when iteration count is known") },
1032 {"unroll-all-loops", &flag_unroll_all_loops, 1,
1033 N_("Perform loop unrolling for all loops") },
1034 {"move-all-movables", &flag_move_all_movables, 1,
1035 N_("Force all loop invariant computations out of loops") },
1036 {"reduce-all-givs", &flag_reduce_all_givs, 1,
1037 N_("Strength reduce all loop general induction variables") },
1038 {"writable-strings", &flag_writable_strings, 1,
1039 N_("Store strings in writable data section") },
1040 {"peephole", &flag_no_peephole, 0,
1041 N_("Enable machine specific peephole optimisations") },
1042 {"force-mem", &flag_force_mem, 1,
1043 N_("Copy memory operands into registers before using") },
1044 {"force-addr", &flag_force_addr, 1,
1045 N_("Copy memory address constants into regs before using") },
1046 {"function-cse", &flag_no_function_cse, 0,
1047 N_("Allow function addresses to be held in registers") },
1048 {"inline-functions", &flag_inline_functions, 1,
1049 N_("Integrate simple functions into their callers") },
1050 {"keep-inline-functions", &flag_keep_inline_functions, 1,
1051 N_("Generate code for funcs even if they are fully inlined") },
1052 {"inline", &flag_no_inline, 0,
1053 N_("Pay attention to the 'inline' keyword") },
1054 {"keep-static-consts", &flag_keep_static_consts, 1,
1055 N_("Emit static const variables even if they are not used") },
1056 {"syntax-only", &flag_syntax_only, 1,
1057 N_("Check for syntax errors, then stop") },
1058 {"shared-data", &flag_shared_data, 1,
1059 N_("Mark data as shared rather than private") },
1060 {"caller-saves", &flag_caller_saves, 1,
1061 N_("Enable saving registers around function calls") },
1062 {"pcc-struct-return", &flag_pcc_struct_return, 1,
1063 N_("Return 'short' aggregates in memory, not registers") },
1064 {"reg-struct-return", &flag_pcc_struct_return, 0,
1065 N_("Return 'short' aggregates in registers") },
1066 {"delayed-branch", &flag_delayed_branch, 1,
1067 N_("Attempt to fill delay slots of branch instructions") },
1068 {"gcse", &flag_gcse, 1,
1069 N_("Perform the global common subexpression elimination") },
1070 {"gcse-lm", &flag_gcse_lm, 1,
1071 N_("Perform enhanced load motion during global subexpression elimination") },
1072 {"gcse-sm", &flag_gcse_sm, 1,
1073 N_("Perform store motion after global subexpression elimination") },
1074 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
1075 N_("Run CSE pass after loop optimisations") },
1076 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
1077 N_("Run the loop optimiser twice") },
1078 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
1079 N_("Delete useless null pointer checks") },
1080 {"pretend-float", &flag_pretend_float, 1,
1081 N_("Pretend that host and target use the same FP format") },
1082 {"schedule-insns", &flag_schedule_insns, 1,
1083 N_("Reschedule instructions before register allocation") },
1084 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
1085 N_("Reschedule instructions after register allocation") },
1086 {"sched-interblock",&flag_schedule_interblock, 1,
1087 N_("Enable scheduling across basic blocks") },
1088 {"sched-spec",&flag_schedule_speculative, 1,
1089 N_("Allow speculative motion of non-loads") },
1090 {"sched-spec-load",&flag_schedule_speculative_load, 1,
1091 N_("Allow speculative motion of some loads") },
1092 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
1093 N_("Allow speculative motion of more loads") },
1094 {"branch-count-reg",&flag_branch_on_count_reg, 1,
1095 N_("Replace add,compare,branch with branch on count reg") },
1096 {"pic", &flag_pic, 1,
1097 N_("Generate position independent code, if possible") },
1098 {"PIC", &flag_pic, 2, ""},
1099 {"exceptions", &flag_exceptions, 1,
1100 N_("Enable exception handling") },
1101 {"unwind-tables", &flag_unwind_tables, 1,
1102 N_("Just generate unwind tables for exception handling") },
1103 {"asynchronous-unwind-tables", &flag_asynchronous_unwind_tables, 1,
1104 N_("Generate unwind tables exact at each instruction boundary") },
1105 {"non-call-exceptions", &flag_non_call_exceptions, 1,
1106 N_("Support synchronous non-call exceptions") },
1107 {"profile-arcs", &profile_arc_flag, 1,
1108 N_("Insert arc based program profiling code") },
1109 {"test-coverage", &flag_test_coverage, 1,
1110 N_("Create data files needed by gcov") },
1111 {"branch-probabilities", &flag_branch_probabilities, 1,
1112 N_("Use profiling information for branch probabilities") },
1113 {"reorder-blocks", &flag_reorder_blocks, 1,
1114 N_("Reorder basic blocks to improve code placement") },
1115 {"rename-registers", &flag_rename_registers, 1,
1116 N_("Do the register renaming optimization pass") },
1117 {"common", &flag_no_common, 0,
1118 N_("Do not put unitialised globals in the common section") },
1119 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
1120 N_("Do not generate .size directives") },
1121 {"function-sections", &flag_function_sections, 1,
1122 N_("place each function into its own section") },
1123 {"data-sections", &flag_data_sections, 1,
1124 N_("place data items into their own section") },
1125 {"verbose-asm", &flag_verbose_asm, 1,
1126 N_("Add extra commentry to assembler output") },
1127 {"gnu-linker", &flag_gnu_linker, 1,
1128 N_("Output GNU ld formatted global initialisers") },
1129 {"regmove", &flag_regmove, 1,
1130 N_("Enables a register move optimisation") },
1131 {"optimize-register-move", &flag_regmove, 1,
1132 N_("Do the full regmove optimization pass") },
1133 {"pack-struct", &flag_pack_struct, 1,
1134 N_("Pack structure members together without holes") },
1135 {"stack-check", &flag_stack_check, 1,
1136 N_("Insert stack checking code into the program") },
1137 {"argument-alias", &flag_argument_noalias, 0,
1138 N_("Specify that arguments may alias each other & globals") },
1139 {"argument-noalias", &flag_argument_noalias, 1,
1140 N_("Assume arguments may alias globals but not each other") },
1141 {"argument-noalias-global", &flag_argument_noalias, 2,
1142 N_("Assume arguments do not alias each other or globals") },
1143 {"strict-aliasing", &flag_strict_aliasing, 1,
1144 N_("Assume strict aliasing rules apply") },
1145 {"align-loops", &align_loops, 0,
1146 N_("Align the start of loops") },
1147 {"align-jumps", &align_jumps, 0,
1148 N_("Align labels which are only reached by jumping") },
1149 {"align-labels", &align_labels, 0,
1150 N_("Align all labels") },
1151 {"align-functions", &align_functions, 0,
1152 N_("Align the start of functions") },
1153 {"merge-constants", &flag_merge_constants, 1,
1154 N_("Attempt to merge identical constants accross compilation units") },
1155 {"merge-all-constants", &flag_merge_constants, 2,
1156 N_("Attempt to merge identical constants and constant variables") },
1157 {"check-memory-usage", &flag_check_memory_usage, 1,
1158 N_("Generate code to check every memory access") },
1159 {"prefix-function-name", &flag_prefix_function_name, 1,
1160 N_("Add a prefix to all function names") },
1161 {"dump-unnumbered", &flag_dump_unnumbered, 1,
1162 N_("Suppress output of instruction numbers and line number notes in debugging dumps") },
1163 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
1164 N_("Instrument function entry/exit with profiling calls") },
1165 {"ssa", &flag_ssa, 1,
1166 N_("Enable SSA optimizations") },
1167 {"ssa-ccp", &flag_ssa_ccp, 1,
1168 N_("Enable SSA conditonal constant propagation") },
1169 {"ssa-dce", &flag_ssa_dce, 1,
1170 N_("Enable aggressive SSA dead code elimination") },
1171 {"leading-underscore", &flag_leading_underscore, 1,
1172 N_("External symbols have a leading underscore") },
1173 {"ident", &flag_no_ident, 0,
1174 N_("Process #ident directives") },
1175 { "peephole2", &flag_peephole2, 1,
1176 N_("Enables an rtl peephole pass run before sched2") },
1177 { "guess-branch-probability", &flag_guess_branch_prob, 1,
1178 N_("Enables guessing of branch probabilities") },
1179 {"math-errno", &flag_errno_math, 1,
1180 N_("Set errno after built-in math functions") },
1181 {"trapping-math", &flag_trapping_math, 1,
1182 N_("Floating-point operations can trap") },
1183 {"unsafe-math-optimizations", &flag_unsafe_math_optimizations, 1,
1184 N_("Allow math optimizations that may violate IEEE or ANSI standards") },
1185 {"bounded-pointers", &flag_bounded_pointers, 1,
1186 N_("Compile pointers as triples: value, base & end") },
1187 {"bounds-check", &flag_bounds_check, 1,
1188 N_("Generate code to check bounds before dereferencing pointers and arrays") },
1189 {"single-precision-constant", &flag_single_precision_constant, 1,
1190 N_("Convert floating point constant to single precision constant") },
1191 {"time-report", &time_report, 1,
1192 N_("Report time taken by each compiler pass at end of run") },
1193 {"mem-report", &mem_report, 1,
1194 N_("Report on permanent memory allocation at end of run") },
1195 { "trapv", &flag_trapv, 1,
1196 N_("Trap for signed overflow in addition / subtraction / multiplication.") },
1199 /* Table of language-specific options. */
1201 static const struct lang_opt
1203 const char *const option;
1204 const char *const description;
1206 documented_lang_options[] =
1208 /* In order not to overload the --help output, the convention
1209 used here is to only describe those options which are not
1210 enabled by default. */
1213 N_("Compile just for ISO C89") },
1214 { "-fallow-single-precision",
1215 N_("Do not promote floats to double if using -traditional") },
1217 N_("Determine language standard") },
1219 { "-fsigned-bitfields", "" },
1220 { "-funsigned-bitfields",
1221 N_("Make bitfields by unsigned by default") },
1222 { "-fno-signed-bitfields", "" },
1223 { "-fno-unsigned-bitfields","" },
1225 N_("Make 'char' be signed by default") },
1226 { "-funsigned-char",
1227 N_("Make 'char' be unsigned by default") },
1228 { "-fno-signed-char", "" },
1229 { "-fno-unsigned-char", "" },
1231 { "-ftraditional", "" },
1233 N_("Attempt to support traditional K&R style C") },
1234 { "-fnotraditional", "" },
1235 { "-fno-traditional", "" },
1239 N_("Do not recognise the 'asm' keyword") },
1240 { "-fbuiltin", "" },
1242 N_("Do not recognise any built in functions") },
1244 N_("Assume normal C execution environment") },
1245 { "-fno-hosted", "" },
1247 N_("Assume that standard libraries & main might not exist") },
1248 { "-fno-freestanding", "" },
1249 { "-fcond-mismatch",
1250 N_("Allow different types as args of ? operator") },
1251 { "-fno-cond-mismatch", "" },
1252 { "-fdollars-in-identifiers",
1253 N_("Allow the use of $ inside identifiers") },
1254 { "-fno-dollars-in-identifiers", "" },
1255 { "-fpreprocessed", "" },
1256 { "-fno-preprocessed", "" },
1258 N_("Use the same size for double as for float") },
1259 { "-fno-short-double", "" },
1261 N_("Use the smallest fitting integer to hold enums") },
1262 { "-fno-short-enums", "" },
1264 N_("Override the underlying type for wchar_t to `unsigned short'") },
1265 { "-fno-short-wchar", "" },
1268 N_("Enable most warning messages") },
1269 { "-Wbad-function-cast",
1270 N_("Warn about casting functions to incompatible types") },
1271 { "-Wno-bad-function-cast", "" },
1272 { "-Wno-missing-noreturn", "" },
1273 { "-Wmissing-format-attribute",
1274 N_("Warn about functions which might be candidates for format attributes") },
1275 { "-Wno-missing-format-attribute", "" },
1277 N_("Warn about casts which discard qualifiers") },
1278 { "-Wno-cast-qual", "" },
1279 { "-Wchar-subscripts",
1280 N_("Warn about subscripts whose type is 'char'") },
1281 { "-Wno-char-subscripts", "" },
1283 N_("Warn if nested comments are detected") },
1284 { "-Wno-comment", "" },
1286 N_("Warn if nested comments are detected") },
1287 { "-Wno-comments", "" },
1289 N_("Warn about possibly confusing type conversions") },
1290 { "-Wno-conversion", "" },
1292 N_("Warn about printf/scanf/strftime/strfmon format anomalies") },
1293 { "-Wno-format", "" },
1294 { "-Wformat-y2k", "" },
1295 { "-Wno-format-y2k",
1296 N_("Don't warn about strftime formats yielding 2 digit years") },
1297 { "-Wformat-extra-args", "" },
1298 { "-Wno-format-extra-args",
1299 N_("Don't warn about too many arguments to format functions") },
1300 { "-Wformat-nonliteral",
1301 N_("Warn about non-string-literal format strings") },
1302 { "-Wno-format-nonliteral", "" },
1303 { "-Wformat-security",
1304 N_("Warn about possible security problems with format functions") },
1305 { "-Wno-format-security", "" },
1306 { "-Wimplicit-function-declaration",
1307 N_("Warn about implicit function declarations") },
1308 { "-Wno-implicit-function-declaration", "" },
1309 { "-Werror-implicit-function-declaration", "" },
1311 N_("Warn when a declaration does not specify a type") },
1312 { "-Wno-implicit-int", "" },
1313 { "-Wimplicit", "" },
1314 { "-Wno-implicit", "" },
1316 N_("Warn about the use of the #import directive") },
1317 { "-Wno-import", "" },
1318 { "-Wlong-long","" },
1320 N_("Do not warn about using 'long long' when -pedantic") },
1322 N_("Warn about suspicious declarations of main") },
1323 { "-Wno-main", "" },
1324 { "-Wmissing-braces",
1325 N_("Warn about possibly missing braces around initialisers") },
1326 { "-Wno-missing-braces", "" },
1327 { "-Wmissing-declarations",
1328 N_("Warn about global funcs without previous declarations") },
1329 { "-Wno-missing-declarations", "" },
1330 { "-Wmissing-prototypes",
1331 N_("Warn about global funcs without prototypes") },
1332 { "-Wno-missing-prototypes", "" },
1334 N_("Warn about use of multicharacter literals") },
1335 { "-Wno-multichar", "" },
1336 { "-Wnested-externs",
1337 N_("Warn about externs not at file scope level") },
1338 { "-Wno-nested-externs", "" },
1340 N_("Warn about possible missing parentheses") },
1341 { "-Wno-parentheses", "" },
1342 { "-Wsequence-point",
1343 N_("Warn about possible violations of sequence point rules") },
1344 { "-Wno-sequence-point", "" },
1345 { "-Wpointer-arith",
1346 N_("Warn about function pointer arithmetic") },
1347 { "-Wno-pointer-arith", "" },
1348 { "-Wredundant-decls",
1349 N_("Warn about multiple declarations of the same object") },
1350 { "-Wno-redundant-decls", "" },
1352 N_("Warn about signed/unsigned comparisons") },
1353 { "-Wno-sign-compare", "" },
1355 N_("Warn about testing equality of floating point numbers") },
1356 { "-Wno-float-equal", "" },
1357 { "-Wunknown-pragmas",
1358 N_("Warn about unrecognized pragmas") },
1359 { "-Wno-unknown-pragmas", "" },
1360 { "-Wstrict-prototypes",
1361 N_("Warn about non-prototyped function decls") },
1362 { "-Wno-strict-prototypes", "" },
1364 N_("Warn about constructs whose meaning change in ISO C") },
1365 { "-Wno-traditional", "" },
1367 N_("Warn when trigraphs are encountered") },
1368 { "-Wno-trigraphs", "" },
1370 { "-Wno-undef", "" },
1371 { "-Wwrite-strings",
1372 N_("Mark strings as 'const char *'") },
1373 { "-Wno-write-strings", "" },
1375 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1377 #include "options.h"
1381 /* Here is a table, controlled by the tm.h file, listing each -m switch
1382 and which bits in `target_switches' it should set or clear.
1383 If VALUE is positive, it is bits to set.
1384 If VALUE is negative, -VALUE is bits to clear.
1385 (The sign bit is not used so there is no confusion.) */
1389 const char *const name;
1391 const char *const description;
1393 target_switches [] = TARGET_SWITCHES;
1395 /* This table is similar, but allows the switch to have a value. */
1397 #ifdef TARGET_OPTIONS
1400 const char *const prefix;
1401 const char **const variable;
1402 const char *const description;
1404 target_options [] = TARGET_OPTIONS;
1407 /* Options controlling warnings. */
1409 /* Don't print warning messages. -w. */
1411 int inhibit_warnings = 0;
1413 /* Don't suppress warnings from system headers. -Wsystem-headers. */
1415 int warn_system_headers = 0;
1417 /* Print various extra warnings. -W. */
1419 int extra_warnings = 0;
1421 /* Treat warnings as errors. -Werror. */
1423 int warnings_are_errors = 0;
1425 /* Nonzero to warn about unused variables, functions et.al. */
1427 int warn_unused_function;
1428 int warn_unused_label;
1429 int warn_unused_parameter;
1430 int warn_unused_variable;
1431 int warn_unused_value;
1434 set_Wunused (setting)
1437 warn_unused_function = setting;
1438 warn_unused_label = setting;
1439 /* Unused function parameter warnings are reported when either ``-W
1440 -Wunused'' or ``-Wunused-parameter'' is specified. Differentiate
1441 -Wunused by setting WARN_UNUSED_PARAMETER to -1. */
1443 warn_unused_parameter = 0;
1444 else if (!warn_unused_parameter)
1445 warn_unused_parameter = -1;
1446 warn_unused_variable = setting;
1447 warn_unused_value = setting;
1450 /* Nonzero to warn about code which is never reached. */
1452 int warn_notreached;
1454 /* Nonzero to warn about variables used before they are initialized. */
1456 int warn_uninitialized;
1458 /* Nonzero means warn about all declarations which shadow others. */
1462 /* Warn if a switch on an enum fails to have a case for every enum value. */
1466 /* Nonzero means warn about function definitions that default the return type
1467 or that use a null return and have a return-type other than void. */
1469 int warn_return_type;
1471 /* Nonzero means warn about pointer casts that increase the required
1472 alignment of the target type (and might therefore lead to a crash
1473 due to a misaligned access). */
1475 int warn_cast_align;
1477 /* Nonzero means warn about any objects definitions whose size is larger
1478 than N bytes. Also want about function definitions whose returned
1479 values are larger than N bytes. The value N is in `larger_than_size'. */
1481 int warn_larger_than;
1482 HOST_WIDE_INT larger_than_size;
1484 /* Nonzero means warn if inline function is too large. */
1488 /* Warn if a function returns an aggregate,
1489 since there are often incompatible calling conventions for doing this. */
1491 int warn_aggregate_return;
1493 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1497 /* Warn when gcc pads a structure to an alignment boundary. */
1501 /* Warn when an optimization pass is disabled. */
1503 int warn_disabled_optimization;
1505 /* Warn about functions which might be candidates for attribute noreturn. */
1507 int warn_missing_noreturn;
1509 /* Likewise for -W. */
1511 lang_independent_options W_options[] =
1513 {"unused-function", &warn_unused_function, 1,
1514 N_("Warn when a function is unused") },
1515 {"unused-label", &warn_unused_label, 1,
1516 N_("Warn when a label is unused") },
1517 {"unused-parameter", &warn_unused_parameter, 1,
1518 N_("Warn when a function parameter is unused") },
1519 {"unused-variable", &warn_unused_variable, 1,
1520 N_("Warn when a variable is unused") },
1521 {"unused-value", &warn_unused_value, 1,
1522 N_("Warn when an expression value is unused") },
1523 {"system-headers", &warn_system_headers, 1,
1524 N_("Do not suppress warnings from system headers") },
1525 {"error", &warnings_are_errors, 1,
1526 N_("Treat all warnings as errors") },
1527 {"shadow", &warn_shadow, 1,
1528 N_("Warn when one local variable shadows another") },
1529 {"switch", &warn_switch, 1,
1530 N_("Warn about enumerated switches missing a specific case") },
1531 {"aggregate-return", &warn_aggregate_return, 1,
1532 N_("Warn about returning structures, unions or arrays") },
1533 {"cast-align", &warn_cast_align, 1,
1534 N_("Warn about pointer casts which increase alignment") },
1535 {"unreachable-code", &warn_notreached, 1,
1536 N_("Warn about code that will never be executed") },
1537 {"uninitialized", &warn_uninitialized, 1,
1538 N_("Warn about unitialized automatic variables") },
1539 {"inline", &warn_inline, 1,
1540 N_("Warn when an inlined function cannot be inlined") },
1541 {"packed", &warn_packed, 1,
1542 N_("Warn when the packed attribute has no effect on struct layout") },
1543 {"padded", &warn_padded, 1,
1544 N_("Warn when padding is required to align struct members") },
1545 {"disabled-optimization", &warn_disabled_optimization, 1,
1546 N_("Warn when an optimization pass is disabled") },
1547 {"missing-noreturn", &warn_missing_noreturn, 1,
1548 N_("Warn about functions which might be candidates for attribute noreturn") }
1551 /* The following routines are useful in setting all the flags that
1552 -ffast-math and -fno-fast-math imply. */
1555 set_fast_math_flags ()
1557 flag_trapping_math = 0;
1558 flag_unsafe_math_optimizations = 1;
1559 flag_errno_math = 0;
1563 set_no_fast_math_flags ()
1565 flag_trapping_math = 1;
1566 flag_unsafe_math_optimizations = 0;
1567 flag_errno_math = 1;
1571 /* Output files for assembler code (real compiler output)
1572 and debugging dumps. */
1575 FILE *aux_info_file;
1576 FILE *rtl_dump_file = NULL;
1578 /* Decode the string P as an integral parameter.
1579 If the string is indeed an integer return its numeric value else
1580 issue an Invalid Option error for the option PNAME and return DEFVAL.
1581 If PNAME is zero just return DEFVAL, do not call error. */
1584 read_integral_parameter (p, pname, defval)
1589 const char *endp = p;
1593 if (*endp >= '0' && *endp <= '9')
1602 error ("Invalid option `%s'", pname);
1610 /* This is the default decl_printable_name function. */
1613 decl_name (decl, verbosity)
1615 int verbosity ATTRIBUTE_UNUSED;
1617 return IDENTIFIER_POINTER (DECL_NAME (decl));
1621 /* This calls abort and is used to avoid problems when abort if a macro.
1622 It is used when we need to pass the address of abort. */
1630 /* When `malloc.c' is compiled with `rcheck' defined,
1631 it calls this function to report clobberage. */
1635 const char *s ATTRIBUTE_UNUSED;
1640 /* Return the logarithm of X, base 2, considering X unsigned,
1641 if X is a power of 2. Otherwise, returns -1.
1643 This should be used via the `exact_log2' macro. */
1647 unsigned HOST_WIDE_INT x;
1650 /* Test for 0 or a power of 2. */
1651 if (x == 0 || x != (x & -x))
1653 while ((x >>= 1) != 0)
1658 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1659 If X is 0, return -1.
1661 This should be used via the floor_log2 macro. */
1665 unsigned HOST_WIDE_INT x;
1674 static int float_handler_set;
1676 jmp_buf float_handler;
1678 /* Signals actually come here. */
1681 float_signal (signo)
1682 /* If this is missing, some compilers complain. */
1683 int signo ATTRIBUTE_UNUSED;
1685 if (float_handled == 0)
1686 crash_signal (signo);
1689 /* On System-V derived systems, we must reinstall the signal handler.
1690 This is harmless on BSD-derived systems. */
1691 signal (SIGFPE, float_signal);
1692 longjmp (float_handler, 1);
1695 /* Specify where to longjmp to when a floating arithmetic error happens.
1696 If HANDLER is 0, it means don't handle the errors any more. */
1699 set_float_handler (handler)
1702 float_handled = (handler != 0);
1704 memcpy (float_handler, handler, sizeof (float_handler));
1706 if (float_handled && ! float_handler_set)
1708 signal (SIGFPE, float_signal);
1709 float_handler_set = 1;
1713 /* This is a wrapper function for code which might elicit an
1714 arithmetic exception. That code should be passed in as a function
1715 pointer FN, and one argument DATA. DATA is usually a struct which
1716 contains the real input and output for function FN. This function
1717 returns 0 (failure) if longjmp was called (i.e. an exception
1718 occured.) It returns 1 (success) otherwise. */
1721 do_float_handler (fn, data)
1722 void (*fn) PARAMS ((PTR));
1729 /* We got here via longjmp () caused by an exception in function
1731 set_float_handler (NULL);
1735 set_float_handler (buf);
1737 set_float_handler (NULL);
1741 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1742 into ICE messages, which is much more user friendly. */
1745 crash_signal (signo)
1748 internal_error ("Internal error: %s", strsignal (signo));
1751 /* Strip off a legitimate source ending from the input string NAME of
1752 length LEN. Rather than having to know the names used by all of
1753 our front ends, we strip off an ending of a period followed by
1754 up to five characters. (Java uses ".class".) */
1757 strip_off_ending (name, len)
1762 for (i = 2; i < 6 && len > i; i++)
1764 if (name[len - i] == '.')
1766 name[len - i] = '\0';
1772 /* Output a quoted string. */
1775 output_quoted_string (asm_file, string)
1779 #ifdef OUTPUT_QUOTED_STRING
1780 OUTPUT_QUOTED_STRING (asm_file, string);
1784 putc ('\"', asm_file);
1785 while ((c = *string++) != 0)
1787 if (c == '\"' || c == '\\')
1788 putc ('\\', asm_file);
1791 putc ('\"', asm_file);
1795 /* Output a file name in the form wanted by System V. */
1798 output_file_directive (asm_file, input_name)
1800 const char *input_name;
1802 int len = strlen (input_name);
1803 const char *na = input_name + len;
1805 /* NA gets INPUT_NAME sans directory names. */
1806 while (na > input_name)
1808 if (IS_DIR_SEPARATOR (na[-1]))
1813 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1814 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1816 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1817 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1819 fprintf (asm_file, "\t.file\t");
1820 output_quoted_string (asm_file, na);
1821 fputc ('\n', asm_file);
1826 /* Routine to open a dump file. Return true if the dump file is enabled. */
1829 open_dump_file (index, decl)
1830 enum dump_file_index index;
1834 const char *open_arg;
1837 if (! dump_file[index].enabled)
1840 timevar_push (TV_DUMP);
1841 if (rtl_dump_file != NULL)
1842 fclose (rtl_dump_file);
1844 sprintf (seq, ".%02d.", index);
1846 if (! dump_file[index].initialized)
1848 /* If we've not initialized the files, do so now. */
1849 if (graph_dump_format != no_graph
1850 && dump_file[index].graph_dump_p)
1852 dump_name = concat (seq, dump_file[index].extension, NULL);
1853 clean_graph_dump_file (dump_base_name, dump_name);
1856 dump_file[index].initialized = 1;
1862 dump_name = concat (dump_base_name, seq,
1863 dump_file[index].extension, NULL);
1865 rtl_dump_file = fopen (dump_name, open_arg);
1866 if (rtl_dump_file == NULL)
1867 fatal_io_error ("can't open %s", dump_name);
1872 fprintf (rtl_dump_file, "\n;; Function %s\n\n",
1873 decl_printable_name (decl, 2));
1875 timevar_pop (TV_DUMP);
1879 /* Routine to close a dump file. */
1882 close_dump_file (index, func, insns)
1883 enum dump_file_index index;
1884 void (*func) PARAMS ((FILE *, rtx));
1887 if (! rtl_dump_file)
1890 timevar_push (TV_DUMP);
1892 && graph_dump_format != no_graph
1893 && dump_file[index].graph_dump_p)
1898 sprintf (seq, ".%02d.", index);
1899 suffix = concat (seq, dump_file[index].extension, NULL);
1900 print_rtl_graph_with_bb (dump_base_name, suffix, insns);
1905 func (rtl_dump_file, insns);
1907 fflush (rtl_dump_file);
1908 fclose (rtl_dump_file);
1910 rtl_dump_file = NULL;
1911 timevar_pop (TV_DUMP);
1914 /* Do any final processing required for the declarations in VEC, of
1915 which there are LEN. We write out inline functions and variables
1916 that have been deferred until this point, but which are required.
1917 Returns non-zero if anything was put out. */
1920 wrapup_global_declarations (vec, len)
1927 int output_something = 0;
1929 for (i = 0; i < len; i++)
1933 /* We're not deferring this any longer. */
1934 DECL_DEFER_OUTPUT (decl) = 0;
1936 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1937 && incomplete_decl_finalize_hook != 0)
1938 (*incomplete_decl_finalize_hook) (decl);
1941 /* Now emit any global variables or functions that we have been
1942 putting off. We need to loop in case one of the things emitted
1943 here references another one which comes earlier in the list. */
1947 for (i = 0; i < len; i++)
1951 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1954 /* Don't write out static consts, unless we still need them.
1956 We also keep static consts if not optimizing (for debugging),
1957 unless the user specified -fno-keep-static-consts.
1958 ??? They might be better written into the debug information.
1959 This is possible when using DWARF.
1961 A language processor that wants static constants to be always
1962 written out (even if it is not used) is responsible for
1963 calling rest_of_decl_compilation itself. E.g. the C front-end
1964 calls rest_of_decl_compilation from finish_decl.
1965 One motivation for this is that is conventional in some
1966 environments to write things like:
1967 static const char rcsid[] = "... version string ...";
1968 intending to force the string to be in the executable.
1970 A language processor that would prefer to have unneeded
1971 static constants "optimized away" would just defer writing
1972 them out until here. E.g. C++ does this, because static
1973 constants are often defined in header files.
1975 ??? A tempting alternative (for both C and C++) would be
1976 to force a constant to be written if and only if it is
1977 defined in a main file, as opposed to an include file. */
1979 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1980 && (((! TREE_READONLY (decl) || TREE_PUBLIC (decl))
1981 && !DECL_COMDAT (decl))
1983 && flag_keep_static_consts
1984 && !DECL_ARTIFICIAL (decl))
1985 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1988 rest_of_decl_compilation (decl, NULL, 1, 1);
1991 if (TREE_CODE (decl) == FUNCTION_DECL
1992 && DECL_INITIAL (decl) != 0
1993 && DECL_SAVED_INSNS (decl) != 0
1994 && (flag_keep_inline_functions
1995 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1996 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1999 output_inline_function (decl);
2004 output_something = 1;
2008 return output_something;
2011 /* Issue appropriate warnings for the global declarations in VEC (of
2012 which there are LEN). Output debugging information for them. */
2015 check_global_declarations (vec, len)
2022 for (i = 0; i < len; i++)
2026 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2027 && ! TREE_ASM_WRITTEN (decl))
2028 /* Cancel the RTL for this decl so that, if debugging info
2029 output for global variables is still to come,
2030 this one will be omitted. */
2031 SET_DECL_RTL (decl, NULL_RTX);
2033 /* Warn about any function
2034 declared static but not defined.
2035 We don't warn about variables,
2036 because many programs have static variables
2037 that exist only to get some text into the object file. */
2038 if (TREE_CODE (decl) == FUNCTION_DECL
2039 && (warn_unused_function
2040 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2041 && DECL_INITIAL (decl) == 0
2042 && DECL_EXTERNAL (decl)
2043 && ! DECL_ARTIFICIAL (decl)
2044 && ! TREE_PUBLIC (decl))
2046 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2047 pedwarn_with_decl (decl,
2048 "`%s' used but never defined");
2050 warning_with_decl (decl,
2051 "`%s' declared `static' but never defined");
2052 /* This symbol is effectively an "extern" declaration now. */
2053 TREE_PUBLIC (decl) = 1;
2054 assemble_external (decl);
2057 /* Warn about static fns or vars defined but not used,
2058 but not about inline functions or static consts
2059 since defining those in header files is normal practice. */
2060 if (((warn_unused_function
2061 && TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
2062 || (warn_unused_variable
2063 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
2064 && ! DECL_IN_SYSTEM_HEADER (decl)
2065 && ! DECL_EXTERNAL (decl)
2066 && ! TREE_PUBLIC (decl)
2067 && ! TREE_USED (decl)
2068 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
2069 /* The TREE_USED bit for file-scope decls
2070 is kept in the identifier, to handle multiple
2071 external decls in different scopes. */
2072 && ! TREE_USED (DECL_NAME (decl)))
2073 warning_with_decl (decl, "`%s' defined but not used");
2075 timevar_push (TV_SYMOUT);
2076 (*debug_hooks->global_decl) (decl);
2077 timevar_pop (TV_SYMOUT);
2081 /* Save the current INPUT_FILENAME and LINENO on the top entry in the
2082 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
2083 INPUT_FILENAME and LINENO accordingly. */
2086 push_srcloc (file, line)
2090 struct file_stack *fs;
2092 if (input_file_stack)
2094 input_file_stack->name = input_filename;
2095 input_file_stack->line = lineno;
2098 fs = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2099 fs->name = input_filename = file;
2100 fs->line = lineno = line;
2101 fs->indent_level = 0;
2102 fs->next = input_file_stack;
2103 input_file_stack = fs;
2104 input_file_stack_tick++;
2107 /* Pop the top entry off the stack of presently open source files.
2108 Restore the INPUT_FILENAME and LINENO from the new topmost entry on
2114 struct file_stack *fs;
2116 fs = input_file_stack;
2117 input_file_stack = fs->next;
2119 input_file_stack_tick++;
2120 /* The initial source file is never popped. */
2121 if (!input_file_stack)
2123 input_filename = input_file_stack->name;
2124 lineno = input_file_stack->line;
2127 /* Compile an entire translation unit, whose primary source file is
2128 named NAME. Write a file of assembly output and various debugging
2137 int name_specified = name != 0;
2139 if (dump_base_name == 0)
2140 dump_base_name = name ? name : "gccdump";
2145 /* Start timing total execution time. */
2148 timevar_start (TV_TOTAL);
2150 /* Open assembly code output file. Do this even if -fsyntax-only is on,
2151 because then the driver will have provided the name of a temporary
2152 file or bit bucket for us. */
2154 if (! name_specified && asm_file_name == 0)
2155 asm_out_file = stdout;
2158 if (asm_file_name == 0)
2160 int len = strlen (dump_base_name);
2161 char *dumpname = (char *) xmalloc (len + 6);
2162 memcpy (dumpname, dump_base_name, len + 1);
2163 strip_off_ending (dumpname, len);
2164 strcat (dumpname, ".s");
2165 asm_file_name = dumpname;
2167 if (!strcmp (asm_file_name, "-"))
2168 asm_out_file = stdout;
2170 asm_out_file = fopen (asm_file_name, "w");
2171 if (asm_out_file == 0)
2172 fatal_io_error ("can't open %s for writing", asm_file_name);
2175 /* Initialize data in various passes. */
2178 name = init_parse (name);
2179 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2180 || debug_info_level == DINFO_LEVEL_VERBOSE
2181 || flag_test_coverage
2182 || warn_notreached);
2185 init_decl_processing ();
2191 init_function_once ();
2192 init_stor_layout_once ();
2193 init_varasm_once ();
2194 init_EXPR_INSN_LIST_cache ();
2196 /* The following initialization functions need to generate rtl, so
2197 provide a dummy function context for them. */
2198 init_dummy_function_start ();
2201 if (flag_caller_saves)
2202 init_caller_save ();
2203 expand_dummy_function_end ();
2205 /* If auxiliary info generation is desired, open the output file.
2206 This goes in the same directory as the source file--unlike
2207 all the other output files. */
2208 if (flag_gen_aux_info)
2210 aux_info_file = fopen (aux_info_file_name, "w");
2211 if (aux_info_file == 0)
2212 fatal_io_error ("can't open %s", aux_info_file_name);
2215 #ifdef IO_BUFFER_SIZE
2216 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2217 _IOFBF, IO_BUFFER_SIZE);
2221 name = ggc_strdup (name);
2223 input_filename = name;
2225 /* Put an entry on the input file stack for the main input file. */
2226 push_srcloc (input_filename, 0);
2228 /* Perform language-specific initialization.
2229 This may set main_input_filename. */
2230 (*lang_hooks.init) ();
2232 /* If the input doesn't start with a #line, use the input name
2233 as the official input file name. */
2234 if (main_input_filename == 0)
2235 main_input_filename = name;
2237 if (flag_syntax_only)
2239 write_symbols = NO_DEBUG;
2241 profile_block_flag = 0;
2245 #ifdef ASM_FILE_START
2246 ASM_FILE_START (asm_out_file);
2249 #ifdef ASM_COMMENT_START
2250 if (flag_verbose_asm)
2252 /* Print the list of options in effect. */
2253 print_version (asm_out_file, ASM_COMMENT_START);
2254 print_switch_values (asm_out_file, 0, MAX_LINE,
2255 ASM_COMMENT_START, " ", "\n");
2256 /* Add a blank line here so it appears in assembler output but not
2258 fprintf (asm_out_file, "\n");
2261 } /* ! flag_syntax_only */
2263 /* Set up the debug hooks based on write_symbols. Default to doing
2265 debug_hooks = &do_nothing_debug_hooks;
2266 #if defined(DBX_DEBUGGING_INFO)
2267 if (write_symbols == DBX_DEBUG)
2268 debug_hooks = &dbx_debug_hooks;
2270 #if defined(XCOFF_DEBUGGING_INFO)
2271 if (write_symbols == XCOFF_DEBUG)
2272 debug_hooks = &xcoff_debug_hooks;
2274 #ifdef SDB_DEBUGGING_INFO
2275 if (write_symbols == SDB_DEBUG)
2276 debug_hooks = &sdb_debug_hooks;
2278 #ifdef DWARF_DEBUGGING_INFO
2279 if (write_symbols == DWARF_DEBUG)
2280 debug_hooks = &dwarf_debug_hooks;
2282 #ifdef DWARF2_DEBUGGING_INFO
2283 if (write_symbols == DWARF2_DEBUG)
2284 debug_hooks = &dwarf2_debug_hooks;
2287 if (! targetm.have_named_sections)
2289 if (flag_function_sections)
2291 warning ("-ffunction-sections not supported for this target.");
2292 flag_function_sections = 0;
2294 if (flag_data_sections)
2296 warning ("-fdata-sections not supported for this target.");
2297 flag_data_sections = 0;
2301 if (flag_function_sections
2302 && (profile_flag || profile_block_flag))
2304 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2305 flag_function_sections = 0;
2308 #ifndef OBJECT_FORMAT_ELF
2309 if (flag_function_sections && write_symbols != NO_DEBUG)
2310 warning ("-ffunction-sections may affect debugging on some targets.");
2313 /* If dbx symbol table desired, initialize writing it
2314 and output the predefined types. */
2315 timevar_push (TV_SYMOUT);
2316 #ifdef DWARF2_UNWIND_INFO
2317 if (dwarf2out_do_frame ())
2318 dwarf2out_frame_init ();
2321 (*debug_hooks->init) (main_input_filename);
2322 timevar_pop (TV_SYMOUT);
2324 /* Initialize yet another pass. */
2326 init_final (main_input_filename);
2327 init_branch_prob (dump_base_name);
2329 timevar_push (TV_PARSE);
2331 /* Call the parser, which parses the entire file
2332 (calling rest_of_compilation for each function). */
2335 /* In case there were missing block closers,
2336 get us back to the global binding level. */
2337 while (! global_bindings_p ())
2340 /* Compilation is now finished except for writing
2341 what's left of the symbol table output. */
2343 timevar_pop (TV_PARSE);
2345 if (flag_syntax_only)
2348 globals = getdecls ();
2350 /* Really define vars that have had only a tentative definition.
2351 Really output inline functions that must actually be callable
2352 and have not been output so far. */
2355 int len = list_length (globals);
2356 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2360 /* Process the decls in reverse order--earliest first.
2361 Put them into VEC from back to front, then take out from front. */
2363 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2364 vec[len - i - 1] = decl;
2366 wrapup_global_declarations (vec, len);
2368 /* This must occur after the loop to output deferred functions. Else
2369 the profiler initializer would not be emitted if all the functions
2370 in this compilation unit were deferred.
2372 output_func_start_profiler can not cause any additional functions or
2373 data to need to be output, so it need not be in the deferred function
2375 output_func_start_profiler ();
2377 check_global_declarations (vec, len);
2383 /* Write out any pending weak symbol declarations. */
2387 /* Do dbx symbols. */
2388 timevar_push (TV_SYMOUT);
2390 #ifdef DWARF2_UNWIND_INFO
2391 if (dwarf2out_do_frame ())
2392 dwarf2out_frame_finish ();
2395 (*debug_hooks->finish) (main_input_filename);
2396 timevar_pop (TV_SYMOUT);
2398 /* Output some stuff at end of file if nec. */
2400 dw2_output_indirect_constants ();
2402 end_final (dump_base_name);
2404 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
2406 timevar_push (TV_DUMP);
2407 open_dump_file (DFI_bp, NULL);
2411 close_dump_file (DFI_bp, NULL, NULL_RTX);
2412 timevar_pop (TV_DUMP);
2416 ASM_FILE_END (asm_out_file);
2419 /* Attach a special .ident directive to the end of the file to identify
2420 the version of GCC which compiled this code. The format of the .ident
2421 string is patterned after the ones produced by native SVR4 compilers. */
2424 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
2425 IDENT_ASM_OP, version_string);
2428 /* Language-specific end of compilation actions. */
2430 (*lang_hooks.finish) ();
2432 /* Close the dump files. */
2434 if (flag_gen_aux_info)
2436 fclose (aux_info_file);
2438 unlink (aux_info_file_name);
2441 if (optimize > 0 && open_dump_file (DFI_combine, NULL))
2443 timevar_push (TV_DUMP);
2444 dump_combine_total_stats (rtl_dump_file);
2445 close_dump_file (DFI_combine, NULL, NULL_RTX);
2446 timevar_pop (TV_DUMP);
2449 /* Close non-debugging input and output files. Take special care to note
2450 whether fclose returns an error, since the pages might still be on the
2451 buffer chain while the file is open. */
2455 if (ferror (asm_out_file) != 0)
2456 fatal_io_error ("error writing to %s", asm_file_name);
2457 if (fclose (asm_out_file) != 0)
2458 fatal_io_error ("error closing %s", asm_file_name);
2460 /* Do whatever is necessary to finish printing the graphs. */
2461 if (graph_dump_format != no_graph)
2465 for (i = 0; i < (int) DFI_MAX; ++i)
2466 if (dump_file[i].initialized && dump_file[i].graph_dump_p)
2471 sprintf (seq, ".%02d.", i);
2472 suffix = concat (seq, dump_file[i].extension, NULL);
2473 finish_graph_dump_file (dump_base_name, suffix);
2480 ggc_print_statistics ();
2481 stringpool_statistics ();
2484 /* Free up memory for the benefit of leak detectors. */
2487 /* Stop timing total execution time. */
2488 timevar_stop (TV_TOTAL);
2490 /* Print the times. */
2492 timevar_print (stderr);
2495 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2496 and TYPE_DECL nodes.
2498 This does nothing for local (non-static) variables, unless the
2499 variable is a register variable with an ASMSPEC. In that case, or
2500 if the variable is not an automatic, it sets up the RTL and
2501 outputs any assembler code (label definition, storage allocation
2502 and initialization).
2504 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2505 the assembler symbol name to be used. TOP_LEVEL is nonzero
2506 if this declaration is not within a function. */
2509 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2511 const char *asmspec;
2515 /* Declarations of variables, and of functions defined elsewhere. */
2517 /* The most obvious approach, to put an #ifndef around where
2518 this macro is used, doesn't work since it's inside a macro call. */
2519 #ifndef ASM_FINISH_DECLARE_OBJECT
2520 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2523 /* Forward declarations for nested functions are not "external",
2524 but we need to treat them as if they were. */
2525 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2526 || TREE_CODE (decl) == FUNCTION_DECL)
2528 timevar_push (TV_VARCONST);
2530 make_decl_rtl (decl, asmspec);
2531 /* Don't output anything
2532 when a tentative file-scope definition is seen.
2533 But at end of compilation, do output code for them. */
2534 if (at_end || !DECL_DEFER_OUTPUT (decl))
2535 assemble_variable (decl, top_level, at_end, 0);
2536 if (decl == last_assemble_variable_decl)
2538 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2541 timevar_pop (TV_VARCONST);
2543 else if (DECL_REGISTER (decl) && asmspec != 0)
2545 if (decode_reg_name (asmspec) >= 0)
2547 SET_DECL_RTL (decl, NULL_RTX);
2548 make_decl_rtl (decl, asmspec);
2552 error ("invalid register name `%s' for register variable", asmspec);
2553 DECL_REGISTER (decl) = 0;
2558 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2559 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2560 && TREE_CODE (decl) == TYPE_DECL)
2562 timevar_push (TV_SYMOUT);
2563 dbxout_symbol (decl, 0);
2564 timevar_pop (TV_SYMOUT);
2567 #ifdef SDB_DEBUGGING_INFO
2568 else if (write_symbols == SDB_DEBUG && top_level
2569 && TREE_CODE (decl) == TYPE_DECL)
2571 timevar_push (TV_SYMOUT);
2572 sdbout_symbol (decl, 0);
2573 timevar_pop (TV_SYMOUT);
2578 /* Called after finishing a record, union or enumeral type. */
2581 rest_of_type_compilation (type, toplev)
2582 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2586 tree type ATTRIBUTE_UNUSED;
2587 int toplev ATTRIBUTE_UNUSED;
2590 timevar_push (TV_SYMOUT);
2591 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2592 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2593 dbxout_symbol (TYPE_STUB_DECL (type), !toplev);
2595 #ifdef SDB_DEBUGGING_INFO
2596 if (write_symbols == SDB_DEBUG)
2597 sdbout_symbol (TYPE_STUB_DECL (type), !toplev);
2599 #ifdef DWARF2_DEBUGGING_INFO
2600 if (write_symbols == DWARF2_DEBUG && toplev)
2601 dwarf2out_decl (TYPE_STUB_DECL (type));
2603 timevar_pop (TV_SYMOUT);
2606 /* This is called from finish_function (within yyparse)
2607 after each top-level definition is parsed.
2608 It is supposed to compile that function or variable
2609 and output the assembler code for it.
2610 After we return, the tree storage is freed. */
2613 rest_of_compilation (decl)
2619 int rebuild_label_notes_after_reload;
2620 int register_life_up_to_date;
2622 timevar_push (TV_REST_OF_COMPILATION);
2624 /* Now that we're out of the frontend, we shouldn't have any more
2625 CONCATs anywhere. */
2626 generating_concat_p = 0;
2628 /* When processing delayed functions, prepare_function_start() won't
2629 have been run to re-initialize it. */
2630 cse_not_expected = ! optimize;
2632 /* First, make sure that NOTE_BLOCK is set correctly for each
2633 NOTE_INSN_BLOCK_BEG/NOTE_INSN_BLOCK_END note. */
2634 if (!cfun->x_whole_function_mode_p)
2637 /* Then remove any notes we don't need. That will make iterating
2638 over the instruction sequence faster, and allow the garbage
2639 collector to reclaim the memory used by the notes. */
2640 remove_unnecessary_notes ();
2642 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2643 tree in sensible shape. So, we just recalculate it here. */
2644 if (cfun->x_whole_function_mode_p)
2649 /* If we are reconsidering an inline function
2650 at the end of compilation, skip the stuff for making it inline. */
2652 if (DECL_SAVED_INSNS (decl) == 0)
2658 /* If this is nested inside an inlined external function, pretend
2659 it was only declared. Since we cannot inline such functions,
2660 generating code for this one is not only not necessary but will
2661 confuse some debugging output writers. */
2662 for (parent = DECL_CONTEXT (current_function_decl);
2663 parent != NULL_TREE;
2664 parent = get_containing_scope (parent))
2665 if (TREE_CODE (parent) == FUNCTION_DECL
2666 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2668 DECL_INITIAL (decl) = 0;
2669 goto exit_rest_of_compilation;
2672 /* If requested, consider whether to make this function inline. */
2673 if ((DECL_INLINE (decl) && !flag_no_inline)
2674 || flag_inline_functions)
2676 timevar_push (TV_INTEGRATION);
2677 lose = function_cannot_inline_p (decl);
2678 timevar_pop (TV_INTEGRATION);
2679 if (lose || ! optimize)
2681 if (warn_inline && DECL_INLINE (decl))
2682 warning_with_decl (decl, lose);
2683 DECL_ABSTRACT_ORIGIN (decl) = 0;
2684 /* Don't really compile an extern inline function.
2685 If we can't make it inline, pretend
2686 it was only declared. */
2687 if (DECL_EXTERNAL (decl))
2689 DECL_INITIAL (decl) = 0;
2690 goto exit_rest_of_compilation;
2694 /* ??? Note that this has the effect of making it look
2695 like "inline" was specified for a function if we choose
2696 to inline it. This isn't quite right, but it's
2697 probably not worth the trouble to fix. */
2698 inlinable = DECL_INLINE (decl) = 1;
2701 insns = get_insns ();
2703 /* Dump the rtl code if we are dumping rtl. */
2705 if (open_dump_file (DFI_rtl, decl))
2707 if (DECL_SAVED_INSNS (decl))
2708 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2709 close_dump_file (DFI_rtl, print_rtl, insns);
2712 /* Convert from NOTE_INSN_EH_REGION style notes, and do other
2713 sorts of eh initialization. Delay this until after the
2714 initial rtl dump so that we can see the original nesting. */
2715 convert_from_eh_region_ranges ();
2717 /* If function is inline, and we don't yet know whether to
2718 compile it by itself, defer decision till end of compilation.
2719 finish_compilation will call rest_of_compilation again
2720 for those functions that need to be output. Also defer those
2721 functions that we are supposed to defer. */
2724 || (DECL_INLINE (decl)
2725 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2726 && ! flag_keep_inline_functions)
2727 || DECL_EXTERNAL (decl))))
2728 DECL_DEFER_OUTPUT (decl) = 1;
2730 if (DECL_INLINE (decl))
2731 /* DWARF wants separate debugging info for abstract and
2732 concrete instances of all inline functions, including those
2733 declared inline but not inlined, and those inlined even
2734 though they weren't declared inline. Conveniently, that's
2735 what DECL_INLINE means at this point. */
2736 (*debug_hooks->deferred_inline_function) (decl);
2738 if (DECL_DEFER_OUTPUT (decl))
2740 /* If -Wreturn-type, we have to do a bit of compilation. We just
2741 want to call cleanup the cfg to figure out whether or not we can
2742 fall off the end of the function; we do the minimum amount of
2743 work necessary to make that safe. */
2744 if (warn_return_type)
2746 int saved_optimize = optimize;
2749 rebuild_jump_labels (insns);
2750 find_exception_handler_labels ();
2751 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2752 cleanup_cfg (CLEANUP_PRE_SIBCALL | CLEANUP_PRE_LOOP);
2753 optimize = saved_optimize;
2755 /* CFG is no longer maitained up-to-date. */
2756 free_bb_for_insn ();
2759 current_function_nothrow = nothrow_function_p ();
2760 if (current_function_nothrow)
2761 /* Now we know that this can't throw; set the flag for the benefit
2762 of other functions later in this translation unit. */
2763 TREE_NOTHROW (current_function_decl) = 1;
2765 timevar_push (TV_INTEGRATION);
2766 save_for_inline (decl);
2767 timevar_pop (TV_INTEGRATION);
2768 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2769 goto exit_rest_of_compilation;
2772 /* If specified extern inline but we aren't inlining it, we are
2773 done. This goes for anything that gets here with DECL_EXTERNAL
2774 set, not just things with DECL_INLINE. */
2775 if (DECL_EXTERNAL (decl))
2776 goto exit_rest_of_compilation;
2781 /* Initialize some variables used by the optimizers. */
2782 init_function_for_compilation ();
2784 if (! DECL_DEFER_OUTPUT (decl))
2785 TREE_ASM_WRITTEN (decl) = 1;
2787 /* Now that integrate will no longer see our rtl, we need not
2788 distinguish between the return value of this function and the
2789 return value of called functions. Also, we can remove all SETs
2790 of subregs of hard registers; they are only here because of
2791 integrate. Also, we can now initialize pseudos intended to
2792 carry magic hard reg data throughout the function. */
2793 rtx_equal_function_value_matters = 0;
2794 purge_hard_subreg_sets (get_insns ());
2795 emit_initial_value_sets ();
2797 /* Don't return yet if -Wreturn-type; we need to do cleanup_cfg. */
2798 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2799 goto exit_rest_of_compilation;
2801 /* We may have potential sibling or tail recursion sites. Select one
2802 (of possibly multiple) methods of performing the call. */
2803 if (flag_optimize_sibling_calls)
2805 timevar_push (TV_JUMP);
2806 open_dump_file (DFI_sibling, decl);
2808 optimize_sibling_and_tail_recursive_calls ();
2810 close_dump_file (DFI_sibling, print_rtl, get_insns ());
2811 timevar_pop (TV_JUMP);
2814 /* Complete generation of exception handling code. */
2815 find_exception_handler_labels ();
2818 timevar_push (TV_JUMP);
2819 open_dump_file (DFI_eh, decl);
2821 finish_eh_generation ();
2823 close_dump_file (DFI_eh, print_rtl, get_insns ());
2824 timevar_pop (TV_JUMP);
2828 /* If we are doing position-independent code generation, now
2829 is the time to output special prologues and epilogues.
2830 We do not want to do this earlier, because it just clutters
2831 up inline functions with meaningless insns. */
2836 insns = get_insns ();
2838 /* Copy any shared structure that should not be shared. */
2839 unshare_all_rtl (current_function_decl, insns);
2841 #ifdef SETJMP_VIA_SAVE_AREA
2842 /* This must be performed before virtual register instantiation. */
2843 if (current_function_calls_alloca)
2844 optimize_save_area_alloca (insns);
2847 /* Instantiate all virtual registers. */
2848 instantiate_virtual_regs (current_function_decl, insns);
2850 open_dump_file (DFI_jump, decl);
2852 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2853 are initialized and to compute whether control can drop off the end
2856 timevar_push (TV_JUMP);
2857 /* Turn NOTE_INSN_EXPECTED_VALUE into REG_BR_PROB. Do this
2858 before jump optimization switches branch directions. */
2859 expected_value_to_br_prob ();
2861 reg_scan (insns, max_reg_num (), 0);
2862 rebuild_jump_labels (insns);
2863 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2864 cleanup_cfg ((optimize ? CLEANUP_EXPENSIVE : 0) | CLEANUP_PRE_LOOP);
2866 /* CFG is no longer maitained up-to-date. */
2867 free_bb_for_insn ();
2868 copy_loop_headers (insns);
2869 purge_line_number_notes (insns);
2871 timevar_pop (TV_JUMP);
2873 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2874 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
2876 close_dump_file (DFI_jump, print_rtl, insns);
2877 goto exit_rest_of_compilation;
2880 /* Long term, this should probably move before the jump optimizer too,
2881 but I didn't want to disturb the rtl_dump_and_exit and related
2882 stuff at this time. */
2883 if (optimize > 0 && flag_ssa)
2885 /* Convert to SSA form. */
2887 timevar_push (TV_TO_SSA);
2888 open_dump_file (DFI_ssa, decl);
2890 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2891 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
2894 close_dump_file (DFI_ssa, print_rtl_with_bb, insns);
2895 timevar_pop (TV_TO_SSA);
2897 /* Perform sparse conditional constant propagation, if requested. */
2900 timevar_push (TV_SSA_CCP);
2901 open_dump_file (DFI_ssa_ccp, decl);
2905 close_dump_file (DFI_ssa_ccp, print_rtl_with_bb, get_insns ());
2906 timevar_pop (TV_SSA_CCP);
2909 /* It would be useful to cleanup the CFG at this point, but block
2910 merging and possibly other transformations might leave a PHI
2911 node in the middle of a basic block, which is a strict no-no. */
2913 /* The SSA implementation uses basic block numbers in its phi
2914 nodes. Thus, changing the control-flow graph or the basic
2915 blocks, e.g., calling find_basic_blocks () or cleanup_cfg (),
2916 may cause problems. */
2920 /* Remove dead code. */
2922 timevar_push (TV_SSA_DCE);
2923 open_dump_file (DFI_ssa_dce, decl);
2925 insns = get_insns ();
2926 ssa_eliminate_dead_code();
2928 close_dump_file (DFI_ssa_dce, print_rtl_with_bb, insns);
2929 timevar_pop (TV_SSA_DCE);
2932 /* Convert from SSA form. */
2934 timevar_push (TV_FROM_SSA);
2935 open_dump_file (DFI_ussa, decl);
2937 convert_from_ssa ();
2938 /* New registers have been created. Rescan their usage. */
2939 reg_scan (insns, max_reg_num (), 1);
2941 close_dump_file (DFI_ussa, print_rtl_with_bb, insns);
2942 timevar_pop (TV_FROM_SSA);
2945 /* CFG is no longer maitained up-to-date. */
2946 free_bb_for_insn ();
2949 timevar_push (TV_JUMP);
2953 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
2954 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
2956 /* ??? Run if-conversion before delete_null_pointer_checks,
2957 since the later does not preserve the CFG. This should
2958 be changed -- no since converting if's that are going to
2960 timevar_push (TV_IFCVT);
2962 timevar_pop (TV_IFCVT);
2964 /* CFG is no longer maitained up-to-date. */
2965 free_bb_for_insn ();
2966 /* Try to identify useless null pointer tests and delete them. */
2967 if (flag_delete_null_pointer_checks)
2968 delete_null_pointer_checks (insns);
2971 /* Jump optimization, and the removal of NULL pointer checks, may
2972 have reduced the number of instructions substantially. CSE, and
2973 future passes, allocate arrays whose dimensions involve the
2974 maximum instruction UID, so if we can reduce the maximum UID
2975 we'll save big on memory. */
2976 renumber_insns (rtl_dump_file);
2977 timevar_pop (TV_JUMP);
2979 close_dump_file (DFI_jump, print_rtl, insns);
2983 /* Perform common subexpression elimination.
2984 Nonzero value from `cse_main' means that jumps were simplified
2985 and some code may now be unreachable, so do
2986 jump optimization again. */
2990 open_dump_file (DFI_cse, decl);
2991 timevar_push (TV_CSE);
2993 reg_scan (insns, max_reg_num (), 1);
2995 if (flag_thread_jumps)
2997 timevar_push (TV_JUMP);
2998 thread_jumps (insns, max_reg_num (), 1);
2999 timevar_pop (TV_JUMP);
3002 tem = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
3004 /* If we are not running more CSE passes, then we are no longer
3005 expecting CSE to be run. But always rerun it in a cheap mode. */
3006 cse_not_expected = !flag_rerun_cse_after_loop && !flag_gcse;
3008 if (tem || optimize > 1)
3010 timevar_push (TV_JUMP);
3011 rebuild_jump_labels (insns);
3012 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3013 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
3014 timevar_pop (TV_JUMP);
3015 /* CFG is no longer maitained up-to-date. */
3016 free_bb_for_insn ();
3019 /* Run this after jump optmizations remove all the unreachable code
3020 so that unreachable code will not keep values live. */
3021 delete_trivially_dead_insns (insns, max_reg_num (), 0);
3023 /* Try to identify useless null pointer tests and delete them. */
3024 if (flag_delete_null_pointer_checks)
3026 timevar_push (TV_JUMP);
3027 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3029 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
3031 delete_null_pointer_checks (insns);
3032 /* CFG is no longer maitained up-to-date. */
3033 free_bb_for_insn ();
3034 timevar_pop (TV_JUMP);
3037 /* The second pass of jump optimization is likely to have
3038 removed a bunch more instructions. */
3039 renumber_insns (rtl_dump_file);
3041 timevar_pop (TV_CSE);
3042 close_dump_file (DFI_cse, print_rtl, insns);
3045 open_dump_file (DFI_addressof, decl);
3047 purge_addressof (insns);
3048 reg_scan (insns, max_reg_num (), 1);
3050 close_dump_file (DFI_addressof, print_rtl, insns);
3054 /* Perform global cse. */
3056 if (optimize > 0 && flag_gcse)
3058 int save_csb, save_cfj;
3061 timevar_push (TV_GCSE);
3062 open_dump_file (DFI_gcse, decl);
3064 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3065 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
3066 tem = gcse_main (insns, rtl_dump_file);
3068 save_csb = flag_cse_skip_blocks;
3069 save_cfj = flag_cse_follow_jumps;
3070 flag_cse_skip_blocks = flag_cse_follow_jumps = 0;
3072 /* CFG is no longer maitained up-to-date. */
3073 free_bb_for_insn ();
3074 /* If -fexpensive-optimizations, re-run CSE to clean up things done
3076 if (flag_expensive_optimizations)
3078 timevar_push (TV_CSE);
3079 reg_scan (insns, max_reg_num (), 1);
3080 tem2 = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
3081 timevar_pop (TV_CSE);
3082 cse_not_expected = !flag_rerun_cse_after_loop;
3085 /* If gcse or cse altered any jumps, rerun jump optimizations to clean
3086 things up. Then possibly re-run CSE again. */
3090 timevar_push (TV_JUMP);
3091 rebuild_jump_labels (insns);
3092 delete_trivially_dead_insns (insns, max_reg_num (), 0);
3093 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3094 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_PRE_LOOP);
3095 /* CFG is no longer maitained up-to-date. */
3096 free_bb_for_insn ();
3097 timevar_pop (TV_JUMP);
3099 if (flag_expensive_optimizations)
3101 timevar_push (TV_CSE);
3102 reg_scan (insns, max_reg_num (), 1);
3103 tem2 = cse_main (insns, max_reg_num (), 0, rtl_dump_file);
3104 timevar_pop (TV_CSE);
3108 close_dump_file (DFI_gcse, print_rtl, insns);
3109 timevar_pop (TV_GCSE);
3112 flag_cse_skip_blocks = save_csb;
3113 flag_cse_follow_jumps = save_cfj;
3116 /* Move constant computations out of loops. */
3120 timevar_push (TV_LOOP);
3121 open_dump_file (DFI_loop, decl);
3122 free_bb_for_insn ();
3124 if (flag_rerun_loop_opt)
3126 cleanup_barriers ();
3128 /* We only want to perform unrolling once. */
3130 loop_optimize (insns, rtl_dump_file, 0);
3132 /* The first call to loop_optimize makes some instructions
3133 trivially dead. We delete those instructions now in the
3134 hope that doing so will make the heuristics in loop work
3135 better and possibly speed up compilation. */
3136 delete_trivially_dead_insns (insns, max_reg_num (), 0);
3138 /* The regscan pass is currently necessary as the alias
3139 analysis code depends on this information. */
3140 reg_scan (insns, max_reg_num (), 1);
3142 cleanup_barriers ();
3143 loop_optimize (insns, rtl_dump_file,
3144 (flag_unroll_loops ? LOOP_UNROLL : 0) | LOOP_BCT);
3146 close_dump_file (DFI_loop, print_rtl, insns);
3147 timevar_pop (TV_LOOP);
3154 timevar_push (TV_CSE2);
3155 open_dump_file (DFI_cse2, decl);
3157 if (flag_rerun_cse_after_loop)
3159 /* Running another jump optimization pass before the second
3160 cse pass sometimes simplifies the RTL enough to allow
3161 the second CSE pass to do a better job. Jump_optimize can change
3162 max_reg_num so we must rerun reg_scan afterwards.
3163 ??? Rework to not call reg_scan so often. */
3164 timevar_push (TV_JUMP);
3166 /* The previous call to loop_optimize makes some instructions
3167 trivially dead. We delete those instructions now in the
3168 hope that doing so will make the heuristics in jump work
3169 better and possibly speed up compilation. */
3170 delete_trivially_dead_insns (insns, max_reg_num (), 0);
3172 reg_scan (insns, max_reg_num (), 0);
3174 timevar_push (TV_IFCVT);
3176 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3177 cleanup_cfg (CLEANUP_EXPENSIVE);
3180 timevar_pop(TV_IFCVT);
3182 timevar_pop (TV_JUMP);
3184 /* CFG is no longer maitained up-to-date. */
3185 free_bb_for_insn ();
3186 reg_scan (insns, max_reg_num (), 0);
3187 tem = cse_main (insns, max_reg_num (), 1, rtl_dump_file);
3191 timevar_push (TV_JUMP);
3192 rebuild_jump_labels (insns);
3193 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3194 cleanup_cfg (CLEANUP_EXPENSIVE);
3195 /* CFG is no longer maitained up-to-date. */
3196 free_bb_for_insn ();
3197 timevar_pop (TV_JUMP);
3201 if (flag_thread_jumps)
3203 /* This pass of jump threading straightens out code
3204 that was kinked by loop optimization. */
3205 timevar_push (TV_JUMP);
3206 reg_scan (insns, max_reg_num (), 0);
3207 thread_jumps (insns, max_reg_num (), 0);
3208 timevar_pop (TV_JUMP);
3211 close_dump_file (DFI_cse2, print_rtl, insns);
3212 timevar_pop (TV_CSE2);
3217 cse_not_expected = 1;
3221 /* Do control and data flow analysis; wrote some of the results to
3224 timevar_push (TV_FLOW);
3225 open_dump_file (DFI_cfg, decl);
3227 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3228 cleanup_cfg (optimize ? CLEANUP_EXPENSIVE : 0);
3229 check_function_return_warnings ();
3231 /* It may make more sense to mark constant functions after dead code is
3232 eliminated by life_analyzis, but we need to do it early, as -fprofile-arcs
3233 may insert code making function non-constant, but we still must consider
3234 it as constant, otherwise -fbranch-probabilities will not read data back.
3236 life_analyzis rarely eliminates modification of external memory.
3238 mark_constant_function ();
3240 close_dump_file (DFI_cfg, print_rtl_with_bb, insns);
3242 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3244 timevar_push (TV_BRANCH_PROB);
3245 open_dump_file (DFI_bp, decl);
3249 close_dump_file (DFI_bp, print_rtl_with_bb, insns);
3250 timevar_pop (TV_BRANCH_PROB);
3253 open_dump_file (DFI_life, decl);
3258 /* Discover and record the loop depth at the head of each basic
3259 block. The loop infrastructure does the real job for us. */
3260 flow_loops_find (&loops, LOOP_TREE);
3262 /* Estimate using heuristics if no profiling info is available. */
3263 if (flag_guess_branch_prob)
3264 estimate_probability (&loops);
3267 flow_loops_dump (&loops, rtl_dump_file, NULL, 0);
3269 flow_loops_free (&loops);
3271 life_analysis (insns, rtl_dump_file, PROP_FINAL);
3272 timevar_pop (TV_FLOW);
3276 if (warn_uninitialized || extra_warnings)
3278 uninitialized_vars_warning (DECL_INITIAL (decl));
3280 setjmp_args_warning ();
3283 close_dump_file (DFI_life, print_rtl_with_bb, insns);
3287 /* If -opt, try combining insns through substitution. */
3291 int rebuild_jump_labels_after_combine = 0;
3293 timevar_push (TV_COMBINE);
3294 open_dump_file (DFI_combine, decl);
3296 rebuild_jump_labels_after_combine
3297 = combine_instructions (insns, max_reg_num ());
3299 /* Always purge dead edges, as we may eliminate an insn throwing
3301 rebuild_jump_labels_after_combine |= purge_all_dead_edges ();
3303 /* Combining insns may have turned an indirect jump into a
3304 direct jump. Rebuid the JUMP_LABEL fields of jumping
3306 if (rebuild_jump_labels_after_combine)
3308 timevar_push (TV_JUMP);
3309 rebuild_jump_labels (insns);
3310 timevar_pop (TV_JUMP);
3312 timevar_push (TV_FLOW);
3313 cleanup_cfg (CLEANUP_EXPENSIVE);
3315 /* Blimey. We've got to have the CFG up to date for the call to
3316 if_convert below. However, the random deletion of blocks
3317 without updating life info can wind up with Wierd Stuff in
3318 global_live_at_end. We then run sched1, which updates things
3319 properly, discovers the wierdness and aborts. */
3320 allocate_bb_life_data ();
3321 update_life_info (NULL, UPDATE_LIFE_GLOBAL_RM_NOTES,
3322 PROP_DEATH_NOTES | PROP_KILL_DEAD_CODE
3323 | PROP_SCAN_DEAD_CODE);
3325 timevar_pop (TV_FLOW);
3328 close_dump_file (DFI_combine, print_rtl_with_bb, insns);
3329 timevar_pop (TV_COMBINE);
3334 /* Rerun if-conversion, as combine may have simplified things enough to
3335 now meet sequence length restrictions. */
3338 timevar_push (TV_IFCVT);
3339 open_dump_file (DFI_ce, decl);
3345 close_dump_file (DFI_ce, print_rtl_with_bb, insns);
3346 timevar_pop (TV_IFCVT);
3349 /* Register allocation pre-pass, to reduce number of moves
3350 necessary for two-address machines. */
3351 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3353 timevar_push (TV_REGMOVE);
3354 open_dump_file (DFI_regmove, decl);
3356 regmove_optimize (insns, max_reg_num (), rtl_dump_file);
3358 close_dump_file (DFI_regmove, print_rtl_with_bb, insns);
3359 timevar_pop (TV_REGMOVE);
3364 /* Do unconditional splitting before register allocation to allow machine
3365 description to add extra information not needed previously. */
3366 split_all_insns (1);
3368 /* Any of the several passes since flow1 will have munged register
3369 lifetime data a bit. */
3370 register_life_up_to_date = 0;
3372 #ifdef OPTIMIZE_MODE_SWITCHING
3373 timevar_push (TV_MODE_SWITCH);
3376 if (optimize_mode_switching (NULL))
3378 /* We did work, and so had to regenerate global life information.
3379 Take advantage of this and don't re-recompute register life
3380 information below. */
3381 register_life_up_to_date = 1;
3385 timevar_pop (TV_MODE_SWITCH);
3388 timevar_push (TV_SCHED);
3390 #ifdef INSN_SCHEDULING
3392 /* Print function header into sched dump now
3393 because doing the sched analysis makes some of the dump. */
3394 if (optimize > 0 && flag_schedule_insns)
3396 open_dump_file (DFI_sched, decl);
3398 /* Do control and data sched analysis,
3399 and write some of the results to dump file. */
3401 schedule_insns (rtl_dump_file);
3403 close_dump_file (DFI_sched, print_rtl_with_bb, insns);
3405 /* Register lifetime information was updated as part of verifying
3407 register_life_up_to_date = 1;
3410 timevar_pop (TV_SCHED);
3414 /* Determine if the current function is a leaf before running reload
3415 since this can impact optimizations done by the prologue and
3416 epilogue thus changing register elimination offsets. */
3417 current_function_is_leaf = leaf_function_p ();
3419 timevar_push (TV_LOCAL_ALLOC);
3420 open_dump_file (DFI_lreg, decl);
3422 /* Allocate pseudo-regs that are used only within 1 basic block.
3424 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3425 jump optimizer after register allocation and reloading are finished. */
3427 if (! register_life_up_to_date)
3428 recompute_reg_usage (insns, ! optimize_size);
3430 /* Allocate the reg_renumber array. */
3431 allocate_reg_info (max_regno, FALSE, TRUE);
3433 /* And the reg_equiv_memory_loc array. */
3434 reg_equiv_memory_loc = (rtx *) xcalloc (max_regno, sizeof (rtx));
3436 allocate_initial_values (reg_equiv_memory_loc);
3438 regclass (insns, max_reg_num (), rtl_dump_file);
3439 rebuild_label_notes_after_reload = local_alloc ();
3441 timevar_pop (TV_LOCAL_ALLOC);
3443 if (dump_file[DFI_lreg].enabled)
3445 timevar_push (TV_DUMP);
3447 dump_flow_info (rtl_dump_file);
3448 dump_local_alloc (rtl_dump_file);
3450 close_dump_file (DFI_lreg, print_rtl_with_bb, insns);
3451 timevar_pop (TV_DUMP);
3456 timevar_push (TV_GLOBAL_ALLOC);
3457 open_dump_file (DFI_greg, decl);
3459 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3460 pass fixing up any insns that are invalid. */
3463 failure = global_alloc (rtl_dump_file);
3466 build_insn_chain (insns);
3467 failure = reload (insns, 0);
3470 timevar_pop (TV_GLOBAL_ALLOC);
3472 if (dump_file[DFI_greg].enabled)
3474 timevar_push (TV_DUMP);
3476 dump_global_regs (rtl_dump_file);
3478 close_dump_file (DFI_greg, print_rtl_with_bb, insns);
3479 timevar_pop (TV_DUMP);
3483 goto exit_rest_of_compilation;
3487 open_dump_file (DFI_postreload, decl);
3489 /* Do a very simple CSE pass over just the hard registers. */
3492 timevar_push (TV_RELOAD_CSE_REGS);
3493 reload_cse_regs (insns);
3494 timevar_pop (TV_RELOAD_CSE_REGS);
3497 /* Register allocation and reloading may have turned an indirect jump into
3498 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3499 jumping instructions. */
3500 if (rebuild_label_notes_after_reload)
3502 timevar_push (TV_JUMP);
3504 rebuild_jump_labels (insns);
3506 timevar_pop (TV_JUMP);
3509 close_dump_file (DFI_postreload, print_rtl_with_bb, insns);
3511 /* Re-create the death notes which were deleted during reload. */
3512 timevar_push (TV_FLOW2);
3513 open_dump_file (DFI_flow2, decl);
3515 #ifdef ENABLE_CHECKING
3516 verify_flow_info ();
3519 /* If optimizing, then go ahead and split insns now. */
3521 split_all_insns (0);
3523 cleanup_cfg (optimize ? CLEANUP_EXPENSIVE : 0);
3525 /* On some machines, the prologue and epilogue code, or parts thereof,
3526 can be represented as RTL. Doing so lets us schedule insns between
3527 it and the rest of the code and also allows delayed branch
3528 scheduling to operate in the epilogue. */
3529 thread_prologue_and_epilogue_insns (insns);
3533 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_CROSSJUMP);
3534 life_analysis (insns, rtl_dump_file, PROP_FINAL);
3536 /* This is kind of a heuristic. We need to run combine_stack_adjustments
3537 even for machines with possibly nonzero RETURN_POPS_ARGS
3538 and ACCUMULATE_OUTGOING_ARGS. We expect that only ports having
3539 push instructions will have popping returns. */
3540 #ifndef PUSH_ROUNDING
3541 if (!ACCUMULATE_OUTGOING_ARGS)
3543 combine_stack_adjustments ();
3548 flow2_completed = 1;
3550 close_dump_file (DFI_flow2, print_rtl_with_bb, insns);
3551 timevar_pop (TV_FLOW2);
3553 #ifdef HAVE_peephole2
3554 if (optimize > 0 && flag_peephole2)
3556 timevar_push (TV_PEEPHOLE2);
3557 open_dump_file (DFI_peephole2, decl);
3559 peephole2_optimize (rtl_dump_file);
3561 close_dump_file (DFI_peephole2, print_rtl_with_bb, insns);
3562 timevar_pop (TV_PEEPHOLE2);
3566 if (optimize > 0 && flag_rename_registers)
3568 timevar_push (TV_RENAME_REGISTERS);
3569 open_dump_file (DFI_rnreg, decl);
3571 regrename_optimize ();
3573 close_dump_file (DFI_rnreg, print_rtl_with_bb, insns);
3574 timevar_pop (TV_RENAME_REGISTERS);
3579 timevar_push (TV_IFCVT2);
3580 open_dump_file (DFI_ce2, decl);
3584 close_dump_file (DFI_ce2, print_rtl_with_bb, insns);
3585 timevar_pop (TV_IFCVT2);
3589 split_all_insns (1);
3592 #ifdef INSN_SCHEDULING
3593 if (optimize > 0 && flag_schedule_insns_after_reload)
3595 timevar_push (TV_SCHED2);
3596 open_dump_file (DFI_sched2, decl);
3598 /* Do control and data sched analysis again,
3599 and write some more of the results to dump file. */
3601 split_all_insns (1);
3603 schedule_insns (rtl_dump_file);
3605 close_dump_file (DFI_sched2, print_rtl_with_bb, insns);
3606 timevar_pop (TV_SCHED2);
3612 #ifdef LEAF_REGISTERS
3613 current_function_uses_only_leaf_regs
3614 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3618 timevar_push (TV_REG_STACK);
3619 open_dump_file (DFI_stack, decl);
3621 reg_to_stack (insns, rtl_dump_file);
3623 close_dump_file (DFI_stack, print_rtl_with_bb, insns);
3624 timevar_pop (TV_REG_STACK);
3630 timevar_push (TV_REORDER_BLOCKS);
3631 open_dump_file (DFI_bbro, decl);
3633 /* Last attempt to optimize CFG, as life analyzis possibly removed
3634 some instructions. */
3635 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_POST_REGSTACK
3636 | CLEANUP_CROSSJUMP);
3637 if (flag_reorder_blocks)
3639 reorder_basic_blocks ();
3640 cleanup_cfg (CLEANUP_EXPENSIVE | CLEANUP_POST_REGSTACK);
3643 close_dump_file (DFI_bbro, print_rtl_with_bb, insns);
3644 timevar_pop (TV_REORDER_BLOCKS);
3646 compute_alignments ();
3648 /* CFG is no longer maitained up-to-date. */
3649 free_bb_for_insn ();
3651 /* If a machine dependent reorganization is needed, call it. */
3652 #ifdef MACHINE_DEPENDENT_REORG
3653 timevar_push (TV_MACH_DEP);
3654 open_dump_file (DFI_mach, decl);
3656 MACHINE_DEPENDENT_REORG (insns);
3658 close_dump_file (DFI_mach, print_rtl, insns);
3659 timevar_pop (TV_MACH_DEP);
3664 purge_line_number_notes (insns);
3665 cleanup_barriers ();
3667 /* If a scheduling pass for delayed branches is to be done,
3668 call the scheduling code. */
3671 if (optimize > 0 && flag_delayed_branch)
3673 timevar_push (TV_DBR_SCHED);
3674 open_dump_file (DFI_dbr, decl);
3676 dbr_schedule (insns, rtl_dump_file);
3678 close_dump_file (DFI_dbr, print_rtl, insns);
3679 timevar_pop (TV_DBR_SCHED);
3685 #if defined (HAVE_ATTR_length) && !defined (STACK_REGS)
3686 timevar_push (TV_SHORTEN_BRANCH);
3687 split_all_insns_noflow ();
3688 timevar_pop (TV_SHORTEN_BRANCH);
3691 convert_to_eh_region_ranges ();
3693 /* Shorten branches. */
3694 timevar_push (TV_SHORTEN_BRANCH);
3695 shorten_branches (get_insns ());
3696 timevar_pop (TV_SHORTEN_BRANCH);
3698 current_function_nothrow = nothrow_function_p ();
3699 if (current_function_nothrow)
3700 /* Now we know that this can't throw; set the flag for the benefit
3701 of other functions later in this translation unit. */
3702 TREE_NOTHROW (current_function_decl) = 1;
3704 /* Now turn the rtl into assembler code. */
3706 timevar_push (TV_FINAL);
3711 /* Get the function's name, as described by its RTL. This may be
3712 different from the DECL_NAME name used in the source file. */
3714 x = DECL_RTL (decl);
3715 if (GET_CODE (x) != MEM)
3718 if (GET_CODE (x) != SYMBOL_REF)
3720 fnname = XSTR (x, 0);
3722 assemble_start_function (decl, fnname);
3723 final_start_function (insns, asm_out_file, optimize);
3724 final (insns, asm_out_file, optimize, 0);
3725 final_end_function ();
3727 #ifdef IA64_UNWIND_INFO
3728 /* ??? The IA-64 ".handlerdata" directive must be issued before
3729 the ".endp" directive that closes the procedure descriptor. */
3730 output_function_exception_table ();
3733 assemble_end_function (decl, fnname);
3735 #ifndef IA64_UNWIND_INFO
3736 /* Otherwise, it feels unclean to switch sections in the middle. */
3737 output_function_exception_table ();
3741 fflush (asm_out_file);
3743 /* Release all memory allocated by flow. */
3744 free_basic_block_vars (0);
3746 /* Release all memory held by regsets now. */
3747 regset_release_memory ();
3749 timevar_pop (TV_FINAL);
3753 /* Write DBX symbols if requested. */
3755 /* Note that for those inline functions where we don't initially
3756 know for certain that we will be generating an out-of-line copy,
3757 the first invocation of this routine (rest_of_compilation) will
3758 skip over this code by doing a `goto exit_rest_of_compilation;'.
3759 Later on, finish_compilation will call rest_of_compilation again
3760 for those inline functions that need to have out-of-line copies
3761 generated. During that call, we *will* be routed past here. */
3763 timevar_push (TV_SYMOUT);
3764 (*debug_hooks->function_decl) (decl);
3765 timevar_pop (TV_SYMOUT);
3767 exit_rest_of_compilation:
3769 /* In case the function was not output,
3770 don't leave any temporary anonymous types
3771 queued up for sdb output. */
3772 #ifdef SDB_DEBUGGING_INFO
3773 if (write_symbols == SDB_DEBUG)
3774 sdbout_types (NULL_TREE);
3777 reload_completed = 0;
3778 flow2_completed = 0;
3781 timevar_push (TV_FINAL);
3783 /* Clear out the insn_length contents now that they are no
3785 init_insn_lengths ();
3787 /* Clear out the real_constant_chain before some of the rtx's
3788 it runs through become garbage. */
3789 clear_const_double_mem ();
3791 /* Show no temporary slots allocated. */
3794 free_basic_block_vars (0);
3796 timevar_pop (TV_FINAL);
3798 /* Make sure volatile mem refs aren't considered valid operands for
3799 arithmetic insns. We must call this here if this is a nested inline
3800 function, since the above code leaves us in the init_recog state
3801 (from final.c), and the function context push/pop code does not
3802 save/restore volatile_ok.
3804 ??? Maybe it isn't necessary for expand_start_function to call this
3805 anymore if we do it here? */
3807 init_recog_no_volatile ();
3809 /* We're done with this function. Free up memory if we can. */
3810 free_after_parsing (cfun);
3811 if (! DECL_DEFER_OUTPUT (decl))
3813 free_after_compilation (cfun);
3815 /* Clear integrate.c's pointer to the cfun structure we just
3817 DECL_SAVED_INSNS (decl) = 0;
3823 timevar_pop (TV_REST_OF_COMPILATION);
3833 printf (_(" -ffixed-<register> Mark <register> as being unavailable to the compiler\n"));
3834 printf (_(" -fcall-used-<register> Mark <register> as being corrupted by function calls\n"));
3835 printf (_(" -fcall-saved-<register> Mark <register> as being preserved across functions\n"));
3836 printf (_(" -finline-limit=<number> Limits the size of inlined functions to <number>\n"));
3837 printf (_(" -fmessage-length=<number> Limits diagnostics messages lengths to <number> characters per line. 0 suppresses line-wrapping\n"));
3838 printf (_(" -fdiagnostics-show-location=[once | every-line] Indicates how often source location information should be emitted, as prefix, at the beginning of diagnostics when line-wrapping\n"));
3840 for (i = ARRAY_SIZE (f_options); i--;)
3842 const char *description = f_options[i].description;
3844 if (description != NULL && * description != 0)
3845 printf (" -f%-21s %s\n",
3846 f_options[i].string, _(description));
3849 printf (_(" -O[number] Set optimisation level to [number]\n"));
3850 printf (_(" -Os Optimise for space rather than speed\n"));
3851 for (i = LAST_PARAM; i--;)
3853 const char *description = compiler_params[i].help;
3854 const int length = 21-strlen(compiler_params[i].option);
3856 if (description != NULL && * description != 0)
3857 printf (" --param %s=<value>%.*s%s\n",
3858 compiler_params[i].option,
3859 length > 0 ? length : 1, " ",
3862 printf (_(" -pedantic Issue warnings needed by strict compliance to ISO C\n"));
3863 printf (_(" -pedantic-errors Like -pedantic except that errors are produced\n"));
3864 printf (_(" -w Suppress warnings\n"));
3865 printf (_(" -W Enable extra warnings\n"));
3867 for (i = ARRAY_SIZE (W_options); i--;)
3869 const char *description = W_options[i].description;
3871 if (description != NULL && * description != 0)
3872 printf (" -W%-21s %s\n",
3873 W_options[i].string, _(description));
3876 printf (_(" -Wunused Enable unused warnings\n"));
3877 printf (_(" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n"));
3878 printf (_(" -p Enable function profiling\n"));
3879 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3880 printf (_(" -a Enable block profiling \n"));
3882 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3883 printf (_(" -ax Enable jump profiling \n"));
3885 printf (_(" -o <file> Place output into <file> \n"));
3887 -G <number> Put global and static data smaller than <number>\n\
3888 bytes into a special section (on some targets)\n"));
3890 for (i = ARRAY_SIZE (debug_args); i--;)
3892 if (debug_args[i].description != NULL)
3893 printf (" -g%-21s %s\n",
3894 debug_args[i].arg, _(debug_args[i].description));
3897 printf (_(" -aux-info <file> Emit declaration info into <file>\n"));
3898 printf (_(" -quiet Do not display functions compiled or elapsed time\n"));
3899 printf (_(" -version Display the compiler's version\n"));
3900 printf (_(" -d[letters] Enable dumps from specific passes of the compiler\n"));
3901 printf (_(" -dumpbase <file> Base name to be used for dumps from specific passes\n"));
3902 #if defined INSN_SCHEDULING
3903 printf (_(" -fsched-verbose=<number> Set the verbosity level of the scheduler\n"));
3905 printf (_(" --help Display this information\n"));
3910 /* Display descriptions of language specific options.
3911 If there is no description, note that there is an undocumented option.
3912 If the description is empty, do not display anything. (This allows
3913 options to be deliberately undocumented, for whatever reason).
3914 If the option string is missing, then this is a marker, indicating
3915 that the description string is in fact the name of a language, whose
3916 language specific options are to follow. */
3918 if (ARRAY_SIZE (documented_lang_options) > 1)
3920 printf (_("\nLanguage specific options:\n"));
3922 for (i = 0; i < ARRAY_SIZE (documented_lang_options); i++)
3924 const char *description = documented_lang_options[i].description;
3925 const char *option = documented_lang_options[i].option;
3927 if (description == NULL)
3932 printf (_(" %-23.23s [undocumented]\n"), option);
3934 else if (*description == 0)
3936 else if (option == NULL)
3940 (_("\nThere are undocumented %s specific options as well.\n"),
3944 printf (_("\n Options for %s:\n"), description);
3949 printf (" %-23.23s %s\n", option, _(description));
3954 printf (_("\nThere are undocumented %s specific options as well.\n"),
3957 display_target_options ();
3961 display_target_options ()
3965 if (ARRAY_SIZE (target_switches) > 1
3966 #ifdef TARGET_OPTIONS
3967 || ARRAY_SIZE (target_options) > 1
3975 printf (_("\nTarget specific options:\n"));
3977 for (i = ARRAY_SIZE (target_switches); i--;)
3979 const char *option = target_switches[i].name;
3980 const char *description = target_switches[i].description;
3982 if (option == NULL || *option == 0)
3984 else if (description == NULL)
3989 printf (_(" -m%-23.23s [undocumented]\n"), option);
3991 else if (* description != 0)
3992 doc += printf (" -m%-23.23s %s\n", option, _(description));
3995 #ifdef TARGET_OPTIONS
3996 for (i = ARRAY_SIZE (target_options); i--;)
3998 const char *option = target_options[i].prefix;
3999 const char *description = target_options[i].description;
4001 if (option == NULL || *option == 0)
4003 else if (description == NULL)
4008 printf (_(" -m%-23.23s [undocumented]\n"), option);
4010 else if (* description != 0)
4011 doc += printf (" -m%-23.23s %s\n", option, _(description));
4017 printf (_("\nThere are undocumented target specific options as well.\n"));
4019 printf (_(" They exist, but they are not documented.\n"));
4024 /* Parse a -d... comand line switch. */
4027 decode_d_option (arg)
4036 for (i = 0; i < (int) DFI_MAX; ++i)
4037 dump_file[i].enabled = 1;
4043 flag_print_asm_name = 1;
4046 flag_dump_rtl_in_asm = 1;
4047 flag_print_asm_name = 1;
4050 graph_dump_format = vcg;
4053 rtl_dump_and_exit = 1;
4058 case 'D': /* These are handled by the preprocessor. */
4064 for (i = 0; i < (int) DFI_MAX; ++i)
4065 if (c == dump_file[i].debug_switch)
4067 dump_file[i].enabled = 1;
4072 warning ("unrecognized gcc debugging option: %c", c);
4077 /* Parse a -f... comand line switch. ARG is the value after the -f.
4078 It is safe to access 'ARG - 2' to generate the full switch name.
4079 Return the number of strings consumed. */
4082 decode_f_option (arg)
4086 const char *option_value = NULL;
4088 /* Search for the option in the table of binary f options. */
4089 for (j = ARRAY_SIZE (f_options); j--;)
4091 if (!strcmp (arg, f_options[j].string))
4093 *f_options[j].variable = f_options[j].on_value;
4097 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4098 && ! strcmp (arg + 3, f_options[j].string))
4100 *f_options[j].variable = ! f_options[j].on_value;
4105 if (!strcmp (arg, "fast-math"))
4106 set_fast_math_flags();
4107 else if (!strcmp (arg, "no-fast-math"))
4108 set_no_fast_math_flags();
4109 else if ((option_value = skip_leading_substring (arg, "inline-limit-"))
4110 || (option_value = skip_leading_substring (arg, "inline-limit=")))
4113 read_integral_parameter (option_value, arg - 2,
4115 set_param_value ("max-inline-insns", val);
4117 #ifdef INSN_SCHEDULING
4118 else if ((option_value = skip_leading_substring (arg, "sched-verbose=")))
4119 fix_sched_param ("verbose", option_value);
4121 else if ((option_value = skip_leading_substring (arg, "fixed-")))
4122 fix_register (option_value, 1, 1);
4123 else if ((option_value = skip_leading_substring (arg, "call-used-")))
4124 fix_register (option_value, 0, 1);
4125 else if ((option_value = skip_leading_substring (arg, "call-saved-")))
4126 fix_register (option_value, 0, 0);
4127 else if ((option_value = skip_leading_substring (arg, "align-loops=")))
4128 align_loops = read_integral_parameter (option_value, arg - 2, align_loops);
4129 else if ((option_value = skip_leading_substring (arg, "align-functions=")))
4131 = read_integral_parameter (option_value, arg - 2, align_functions);
4132 else if ((option_value = skip_leading_substring (arg, "align-jumps=")))
4133 align_jumps = read_integral_parameter (option_value, arg - 2, align_jumps);
4134 else if ((option_value = skip_leading_substring (arg, "align-labels=")))
4136 = read_integral_parameter (option_value, arg - 2, align_labels);
4137 else if ((option_value
4138 = skip_leading_substring (arg, "stack-limit-register=")))
4140 int reg = decode_reg_name (option_value);
4142 error ("unrecognized register name `%s'", option_value);
4144 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
4146 else if ((option_value
4147 = skip_leading_substring (arg, "stack-limit-symbol=")))
4150 nm = ggc_strdup (option_value);
4151 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
4153 else if ((option_value
4154 = skip_leading_substring (arg, "message-length=")))
4155 output_set_maximum_length
4156 (&global_dc->buffer, read_integral_parameter
4157 (option_value, arg - 2, diagnostic_line_cutoff (global_dc)));
4158 else if ((option_value
4159 = skip_leading_substring (arg, "diagnostics-show-location=")))
4161 if (!strcmp (option_value, "once"))
4162 diagnostic_prefixing_rule (global_dc) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
4163 else if (!strcmp (option_value, "every-line"))
4164 diagnostic_prefixing_rule (global_dc)
4165 = DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE;
4167 error ("Unrecognized option `%s'", arg - 2);
4169 else if (!strcmp (arg, "no-stack-limit"))
4170 stack_limit_rtx = NULL_RTX;
4171 else if (!strcmp (arg, "preprocessed"))
4172 /* Recognise this switch but do nothing. This prevents warnings
4173 about an unrecognized switch if cpplib has not been linked in. */
4181 /* Parse a -W... comand line switch. ARG is the value after the -W.
4182 It is safe to access 'ARG - 2' to generate the full switch name.
4183 Return the number of strings consumed. */
4186 decode_W_option (arg)
4189 const char *option_value = NULL;
4192 /* Search for the option in the table of binary W options. */
4194 for (j = ARRAY_SIZE (W_options); j--;)
4196 if (!strcmp (arg, W_options[j].string))
4198 *W_options[j].variable = W_options[j].on_value;
4202 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4203 && ! strcmp (arg + 3, W_options[j].string))
4205 *W_options[j].variable = ! W_options[j].on_value;
4210 if ((option_value = skip_leading_substring (arg, "id-clash-")))
4211 warning ("-Wid-clash-LEN is no longer supported");
4212 else if ((option_value = skip_leading_substring (arg, "larger-than-")))
4214 larger_than_size = read_integral_parameter (option_value, arg - 2, -1);
4216 warn_larger_than = larger_than_size != -1;
4218 else if (!strcmp (arg, "unused"))
4222 else if (!strcmp (arg, "no-unused"))
4232 /* Parse a -g... comand line switch. ARG is the value after the -g.
4233 It is safe to access 'ARG - 2' to generate the full switch name.
4234 Return the number of strings consumed. */
4237 decode_g_option (arg)
4240 static unsigned level=0;
4241 /* A lot of code assumes write_symbols == NO_DEBUG if the
4242 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4243 of what debugging type has been selected). This records the
4244 selected type. It is an error to specify more than one
4246 static enum debug_info_type selected_debug_type = NO_DEBUG;
4247 /* Non-zero if debugging format has been explicitly set.
4248 -g and -ggdb don't explicitly set the debugging format so
4249 -gdwarf -g3 is equivalent to -gdwarf3. */
4250 static int type_explicitly_set_p = 0;
4251 /* Indexed by enum debug_info_type. */
4252 static const char *const debug_type_names[] =
4254 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4257 /* The maximum admissible debug level value. */
4258 static const unsigned max_debug_level = 3;
4260 /* Look up ARG in the table. */
4261 for (da = debug_args; da->arg; da++)
4263 const int da_len = strlen (da->arg);
4265 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4267 enum debug_info_type type = da->debug_type;
4268 const char *p = arg + da_len;
4270 if (*p && (*p < '0' || *p > '9'))
4273 /* A debug flag without a level defaults to level 2.
4274 Note we do not want to call read_integral_parameter
4275 for that case since it will call atoi which
4278 ??? We may want to generalize the interface to
4279 read_integral_parameter to better handle this case
4280 if this case shows up often. */
4282 level = read_integral_parameter (p, 0, max_debug_level + 1);
4284 level = (level == 0) ? 2 : level;
4286 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
4288 error ("use -gdwarf -g%d for DWARF v1, level %d",
4291 error ("use -gdwarf-2 for DWARF v2");
4294 if (level > max_debug_level)
4297 ignoring option `%s' due to invalid debug level specification",
4299 level = debug_info_level;
4302 if (type == NO_DEBUG)
4304 type = PREFERRED_DEBUGGING_TYPE;
4306 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
4308 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4309 type = DWARF2_DEBUG;
4311 #ifdef DBX_DEBUGGING_INFO
4318 if (type == NO_DEBUG)
4319 warning ("`%s': unknown or unsupported -g option", arg - 2);
4321 /* Does it conflict with an already selected type? */
4322 if (type_explicitly_set_p
4323 /* -g/-ggdb don't conflict with anything. */
4324 && da->debug_type != NO_DEBUG
4325 && type != selected_debug_type)
4326 warning ("`%s' ignored, conflicts with `-g%s'",
4327 arg - 2, debug_type_names[(int) selected_debug_type]);
4330 /* If the format has already been set, -g/-ggdb
4331 only change the debug level. */
4332 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4333 /* Don't change debugging type. */
4337 selected_debug_type = type;
4338 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4341 write_symbols = (level == 0
4343 : selected_debug_type);
4344 use_gnu_debug_info_extensions = da->use_extensions_p;
4345 debug_info_level = (enum debug_info_level) level;
4358 /* Decode the first argument in the argv as a language-independent option.
4359 Return the number of strings consumed. */
4362 independent_decode_option (argc, argv)
4366 char *arg = argv[0];
4368 if (arg[0] != '-' || arg[1] == 0)
4380 if (!strcmp (arg, "-help"))
4383 exit_after_options = 1;
4386 if (!strcmp (arg, "-target-help"))
4388 display_target_options ();
4389 exit_after_options = 1;
4392 if (!strcmp (arg, "-version"))
4394 print_version (stderr, "");
4395 exit_after_options = 1;
4398 /* Handle '--param <name>=<value>'. */
4399 if (strcmp (arg, "-param") == 0)
4405 error ("-param option missing argument");
4409 /* Get the '<name>=<value>' parameter. */
4411 /* Look for the `='. */
4412 equal = strchr (arg, '=');
4414 error ("invalid --param option: %s", arg);
4419 /* Zero out the `=' sign so that we get two separate strings. */
4421 /* Figure out what value is specified. */
4422 val = read_integral_parameter (equal + 1, NULL, INVALID_PARAM_VAL);
4423 if (val != INVALID_PARAM_VAL)
4424 set_param_value (arg, val);
4426 error ("invalid parameter value `%s'", equal + 1);
4441 /* Already been treated in main (). Do nothing. */
4445 set_target_switch (arg + 1);
4449 return decode_f_option (arg + 1);
4452 return decode_g_option (arg + 1);
4455 if (!strcmp (arg, "dumpbase"))
4460 dump_base_name = argv[1];
4464 decode_d_option (arg + 1);
4468 if (!strcmp (arg, "pedantic"))
4470 else if (!strcmp (arg, "pedantic-errors"))
4471 flag_pedantic_errors = pedantic = 1;
4472 else if (arg[1] == 0)
4479 if (!strcmp (arg, "quiet"))
4486 if (!strcmp (arg, "version"))
4494 inhibit_warnings = 1;
4503 /* We save the value of warn_uninitialized, since if they put
4504 -Wuninitialized on the command line, we need to generate a
4505 warning about not using it without also specifying -O. */
4506 if (warn_uninitialized != 1)
4507 warn_uninitialized = 2;
4510 return decode_W_option (arg + 1);
4516 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4517 warning ("`-a' option (basic block profile) not supported");
4519 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4522 else if (!strcmp (arg, "ax"))
4524 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4525 warning ("`-ax' option (jump profiling) not supported");
4527 profile_block_flag = (!profile_block_flag
4528 || profile_block_flag == 2) ? 2 : 3;
4531 else if (!strncmp (arg, "aux-info", 8))
4538 aux_info_file_name = argv[1];
4539 flag_gen_aux_info = 1;
4542 else if (arg[8] == '=')
4544 aux_info_file_name = arg + 9;
4545 flag_gen_aux_info = 1;
4560 asm_file_name = argv[1];
4575 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4580 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4584 if (g_switch_val == -1)
4588 g_switch_set = TRUE;
4589 g_switch_value = g_switch_val;
4599 /* Entry point of cc1, cc1plus, jc1, f771, etc.
4600 Decode command args, then call compile_file.
4601 Exit code is FATAL_EXIT_CODE if can't open files or if there were
4602 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
4604 It is not safe to call this function more than once. */
4607 toplev_main (argc, argv)
4614 /* save in case md file wants to emit args as a comment. */
4618 p = argv[0] + strlen (argv[0]);
4619 while (p != argv[0] && !IS_DIR_SEPARATOR (p[-1]))
4623 xmalloc_set_program_name (progname);
4625 gcc_init_libintl ();
4627 /* Install handler for SIGFPE, which may be received while we do
4628 compile-time floating point arithmetic. */
4629 signal (SIGFPE, float_signal);
4631 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
4633 signal (SIGSEGV, crash_signal);
4636 signal (SIGILL, crash_signal);
4639 signal (SIGBUS, crash_signal);
4642 signal (SIGABRT, crash_signal);
4644 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
4645 signal (SIGIOT, crash_signal);
4648 decl_printable_name = decl_name;
4649 lang_expand_expr = (lang_expand_expr_t) do_abort;
4651 /* Initialize whether `char' is signed. */
4652 flag_signed_char = DEFAULT_SIGNED_CHAR;
4653 #ifdef DEFAULT_SHORT_ENUMS
4654 /* Initialize how much space enums occupy, by default. */
4655 flag_short_enums = DEFAULT_SHORT_ENUMS;
4658 /* Initialize the garbage-collector. */
4661 ggc_add_rtx_root (&stack_limit_rtx, 1);
4662 ggc_add_tree_root (¤t_function_decl, 1);
4663 ggc_add_tree_root (¤t_function_func_begin_label, 1);
4665 /* Initialize the diagnostics reporting machinery. */
4666 diagnostic_initialize (global_dc);
4668 /* Register the language-independent parameters. */
4669 add_params (lang_independent_params, LAST_PARAM);
4671 /* Perform language-specific options intialization. */
4672 (*lang_hooks.init_options) ();
4674 /* Scan to see what optimization level has been specified. That will
4675 determine the default value of many flags. */
4676 for (i = 1; i < argc; i++)
4678 if (!strcmp (argv[i], "-O"))
4683 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4685 /* Handle -Os, -O2, -O3, -O69, ... */
4686 char *p = &argv[i][2];
4688 if ((p[0] == 's') && (p[1] == 0))
4692 /* Optimizing for size forces optimize to be 2. */
4697 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4698 if (optimize_val != -1)
4700 optimize = optimize_val;
4709 flag_merge_constants = 0;
4715 flag_thread_jumps = 1;
4717 flag_delayed_branch = 1;
4719 #ifdef CAN_DEBUG_WITHOUT_FP
4720 flag_omit_frame_pointer = 1;
4722 flag_guess_branch_prob = 1;
4727 flag_optimize_sibling_calls = 1;
4728 flag_cse_follow_jumps = 1;
4729 flag_cse_skip_blocks = 1;
4731 flag_expensive_optimizations = 1;
4732 flag_strength_reduce = 1;
4733 flag_rerun_cse_after_loop = 1;
4734 flag_rerun_loop_opt = 1;
4735 flag_caller_saves = 1;
4738 #ifdef INSN_SCHEDULING
4739 flag_schedule_insns = 1;
4740 flag_schedule_insns_after_reload = 1;
4743 flag_strict_aliasing = 1;
4744 flag_delete_null_pointer_checks = 1;
4745 flag_reorder_blocks = 1;
4750 flag_inline_functions = 1;
4751 flag_rename_registers = 1;
4754 if (optimize < 2 || optimize_size)
4759 align_functions = 1;
4762 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4765 set_target_switch ("");
4767 /* Unwind tables are always present in an ABI-conformant IA-64
4768 object file, so the default should be ON. */
4769 #ifdef IA64_UNWIND_INFO
4770 flag_unwind_tables = IA64_UNWIND_INFO;
4773 #ifdef OPTIMIZATION_OPTIONS
4774 /* Allow default optimizations to be specified on a per-machine basis. */
4775 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4778 /* Initialize register usage now so switches may override. */
4781 /* Perform normal command line switch decoding. */
4782 for (i = 1; i < argc;)
4785 int indep_processed;
4787 /* Give the language a chance to decode the option for itself. */
4788 lang_processed = (*lang_hooks.decode_option) (argc - i, argv + i);
4790 if (lang_processed >= 0)
4791 /* Now see if the option also has a language independent meaning.
4792 Some options are both language specific and language independent,
4794 indep_processed = independent_decode_option (argc - i, argv + i);
4797 lang_processed = -lang_processed;
4798 indep_processed = 0;
4801 if (lang_processed || indep_processed)
4802 i += MAX (lang_processed, indep_processed);
4805 const char *option = NULL;
4806 const char *lang = NULL;
4809 /* It is possible that the command line switch is not valid for the
4810 current language, but it is valid for another language. In order
4811 to be compatible with previous versions of the compiler (which
4812 did not issue an error message in this case) we check for this
4813 possibility here. If we do find a match, then if extra_warnings
4814 is set we generate a warning message, otherwise we will just
4815 ignore the option. */
4816 for (j = 0; j < ARRAY_SIZE (documented_lang_options); j++)
4818 option = documented_lang_options[j].option;
4821 lang = documented_lang_options[j].description;
4822 else if (! strncmp (argv[i], option, strlen (option)))
4826 if (j != ARRAY_SIZE (documented_lang_options))
4830 warning ("Ignoring command line option '%s'", argv[i]);
4833 ("(It is valid for %s but not the selected language)",
4837 else if (argv[i][0] == '-' && argv[i][1] == 'g')
4838 warning ("`%s': unknown or unsupported -g option", &argv[i][2]);
4840 error ("Unrecognized option `%s'", argv[i]);
4846 /* All command line options have been processed. */
4847 (*lang_hooks.post_options) ();
4849 if (exit_after_options)
4852 /* Checker uses the frame pointer. */
4853 if (flag_check_memory_usage)
4854 flag_omit_frame_pointer = 0;
4858 /* Inlining does not work if not optimizing,
4859 so force it not to be done. */
4863 /* The c_decode_option function and decode_option hook set
4864 this to `2' if -Wall is used, so we can avoid giving out
4865 lots of errors for people who don't realize what -Wall does. */
4866 if (warn_uninitialized == 1)
4867 warning ("-Wuninitialized is not supported without -O");
4870 /* We do not currently support sibling-call optimization in the
4871 presence of exceptions. See PR2975 for a test-case that will
4872 fail if we try to combine both of these features. */
4873 if (flag_exceptions)
4874 flag_optimize_sibling_calls = 0;
4876 #ifdef OVERRIDE_OPTIONS
4877 /* Some machines may reject certain combinations of options. */
4881 /* Set up the align_*_log variables, defaulting them to 1 if they
4882 were still unset. */
4883 if (align_loops <= 0) align_loops = 1;
4884 align_loops_log = floor_log2 (align_loops * 2 - 1);
4885 if (align_jumps <= 0) align_jumps = 1;
4886 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
4887 if (align_labels <= 0) align_labels = 1;
4888 align_labels_log = floor_log2 (align_labels * 2 - 1);
4889 if (align_functions <= 0) align_functions = 1;
4890 align_functions_log = floor_log2 (align_functions * 2 - 1);
4892 if (profile_block_flag == 3)
4894 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4895 profile_block_flag = 2;
4898 /* Unrolling all loops implies that standard loop unrolling must also
4900 if (flag_unroll_all_loops)
4901 flag_unroll_loops = 1;
4902 /* Loop unrolling requires that strength_reduction be on also. Silently
4903 turn on strength reduction here if it isn't already on. Also, the loop
4904 unrolling code assumes that cse will be run after loop, so that must
4905 be turned on also. */
4906 if (flag_unroll_loops)
4908 flag_strength_reduce = 1;
4909 flag_rerun_cse_after_loop = 1;
4912 if (flag_non_call_exceptions)
4913 flag_asynchronous_unwind_tables = 1;
4914 if (flag_asynchronous_unwind_tables)
4915 flag_unwind_tables = 1;
4917 /* Warn about options that are not supported on this machine. */
4918 #ifndef INSN_SCHEDULING
4919 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4920 warning ("instruction scheduling not supported on this target machine");
4923 if (flag_delayed_branch)
4924 warning ("this target machine does not have delayed branches");
4927 /* Some operating systems do not allow profiling without a frame
4929 if (!TARGET_ALLOWS_PROFILING_WITHOUT_FRAME_POINTER
4931 && flag_omit_frame_pointer)
4933 error ("profiling does not work without a frame pointer");
4934 flag_omit_frame_pointer = 0;
4937 user_label_prefix = USER_LABEL_PREFIX;
4938 if (flag_leading_underscore != -1)
4940 /* If the default prefix is more complicated than "" or "_",
4941 issue a warning and ignore this option. */
4942 if (user_label_prefix[0] == 0 ||
4943 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4945 user_label_prefix = flag_leading_underscore ? "_" : "";
4948 warning ("-f%sleading-underscore not supported on this target machine",
4949 flag_leading_underscore ? "" : "no-");
4952 /* If we are in verbose mode, write out the version and maybe all the
4953 option flags in use. */
4956 print_version (stderr, "");
4958 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4961 compile_file (filename);
4964 return (FATAL_EXIT_CODE);
4966 return (FATAL_EXIT_CODE);
4967 return (SUCCESS_EXIT_CODE);
4970 /* Decode -m switches. */
4971 /* Decode the switch -mNAME. */
4974 set_target_switch (name)
4978 int valid_target_option = 0;
4980 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
4981 if (!strcmp (target_switches[j].name, name))
4983 if (target_switches[j].value < 0)
4984 target_flags &= ~-target_switches[j].value;
4986 target_flags |= target_switches[j].value;
4987 valid_target_option = 1;
4990 #ifdef TARGET_OPTIONS
4991 if (!valid_target_option)
4992 for (j = 0; j < ARRAY_SIZE (target_options); j++)
4994 int len = strlen (target_options[j].prefix);
4995 if (!strncmp (target_options[j].prefix, name, len))
4997 *target_options[j].variable = name + len;
4998 valid_target_option = 1;
5003 if (!valid_target_option)
5004 error ("Invalid option `%s'", name);
5007 /* Print version information to FILE.
5008 Each line begins with INDENT (for the case where FILE is the
5009 assembler output file). */
5012 print_version (file, indent)
5017 #define __VERSION__ "[?]"
5021 "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n"
5023 "%s%s%s version %s (%s) compiled by CC.\n"
5025 , indent, *indent != 0 ? " " : "",
5026 language_string, version_string, TARGET_NAME,
5027 indent, __VERSION__);
5030 /* Print an option value and return the adjusted position in the line.
5031 ??? We don't handle error returns from fprintf (disk full); presumably
5032 other code will catch a disk full though. */
5035 print_single_switch (file, pos, max, indent, sep, term, type, name)
5038 const char *indent, *sep, *term, *type, *name;
5040 /* The ultrix fprintf returns 0 on success, so compute the result we want
5041 here since we need it for the following test. */
5042 int len = strlen (sep) + strlen (type) + strlen (name);
5047 fprintf (file, "%s", term);
5052 fprintf (file, "%s", indent);
5053 pos = strlen (indent);
5055 fprintf (file, "%s%s%s", sep, type, name);
5060 /* Print active target switches to FILE.
5061 POS is the current cursor position and MAX is the size of a "line".
5062 Each line begins with INDENT and ends with TERM.
5063 Each switch is separated from the next by SEP. */
5066 print_switch_values (file, pos, max, indent, sep, term)
5069 const char *indent, *sep, *term;
5074 /* Print the options as passed. */
5076 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
5077 _("options passed: "), "");
5079 for (p = &save_argv[1]; *p != NULL; p++)
5083 if (strcmp (*p, "-o") == 0)
5089 if (strcmp (*p, "-quiet") == 0)
5091 if (strcmp (*p, "-version") == 0)
5096 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
5099 fprintf (file, "%s", term);
5101 /* Print the -f and -m options that have been enabled.
5102 We don't handle language specific options but printing argv
5105 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
5106 _("options enabled: "), "");
5108 for (j = 0; j < ARRAY_SIZE (f_options); j++)
5109 if (*f_options[j].variable == f_options[j].on_value)
5110 pos = print_single_switch (file, pos, max, indent, sep, term,
5111 "-f", f_options[j].string);
5113 /* Print target specific options. */
5115 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
5116 if (target_switches[j].name[0] != '\0'
5117 && target_switches[j].value > 0
5118 && ((target_switches[j].value & target_flags)
5119 == target_switches[j].value))
5121 pos = print_single_switch (file, pos, max, indent, sep, term,
5122 "-m", target_switches[j].name);
5125 #ifdef TARGET_OPTIONS
5126 for (j = 0; j < ARRAY_SIZE (target_options); j++)
5127 if (*target_options[j].variable != NULL)
5130 sprintf (prefix, "-m%s", target_options[j].prefix);
5131 pos = print_single_switch (file, pos, max, indent, sep, term,
5132 prefix, *target_options[j].variable);
5136 fprintf (file, "%s", term);