1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 88, 89, 92-98, 1999 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* This is the top level of cc1/c++.
22 It parses command args, opens files, invokes the various passes
23 in the proper order, and counts the time used by each.
24 Error messages and low-level interface to malloc also handled here. */
27 #undef FLOAT /* This is for hpux. They should change hpux. */
28 #undef FFS /* Some systems define this in param.h. */
33 #ifdef HAVE_SYS_RESOURCE_H
34 # include <sys/resource.h>
37 #ifdef HAVE_SYS_TIMES_H
38 # include <sys/times.h>
46 #include "insn-attr.h"
47 #include "insn-codes.h"
48 #include "insn-config.h"
56 #include "basic-block.h"
61 #ifdef DWARF_DEBUGGING_INFO
65 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
66 #include "dwarf2out.h"
69 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
73 #ifdef SDB_DEBUGGING_INFO
77 #ifdef XCOFF_DEBUGGING_INFO
82 /* The extra parameters substantially improve the I/O performance. */
84 vms_fopen (fname, type)
88 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
89 fixed arguments, which matches ANSI's specification but not VAXCRTL's
90 pre-ANSI implementation. This hack circumvents the mismatch problem. */
91 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
94 return (*vmslib_fopen) (fname, type, "mbc=32",
95 "deq=64", "fop=tef", "shr=nil");
97 return (*vmslib_fopen) (fname, type, "mbc=32");
99 #define fopen vms_fopen
102 #ifndef DEFAULT_GDB_EXTENSIONS
103 #define DEFAULT_GDB_EXTENSIONS 1
106 /* If more than one debugging type is supported, you must define
107 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
109 This is one long line cause VAXC can't handle a \-newline. */
110 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
111 #ifndef PREFERRED_DEBUGGING_TYPE
112 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
113 #endif /* no PREFERRED_DEBUGGING_TYPE */
114 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
115 so the following code needn't care. */
116 #ifdef DBX_DEBUGGING_INFO
117 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
119 #ifdef SDB_DEBUGGING_INFO
120 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
122 #ifdef DWARF_DEBUGGING_INFO
123 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
125 #ifdef DWARF2_DEBUGGING_INFO
126 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
128 #ifdef XCOFF_DEBUGGING_INFO
129 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
131 #endif /* More than one debugger format enabled. */
133 /* If still not defined, must have been because no debugging formats
135 #ifndef PREFERRED_DEBUGGING_TYPE
136 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
139 #ifndef DIR_SEPARATOR
140 #define DIR_SEPARATOR '/'
143 #if ! (defined (VMS) || defined (OS2))
144 extern char **environ;
146 extern char *version_string;
148 /* Carry information from ASM_DECLARE_OBJECT_NAME
149 to ASM_FINISH_DECLARE_OBJECT. */
151 extern int size_directive_output;
152 extern tree last_assemble_variable_decl;
154 static void notice PVPROTO((const char *s, ...)) ATTRIBUTE_PRINTF_1;
155 static void set_target_switch PROTO((const char *));
156 static const char *decl_name PROTO((tree, int));
157 static void vmessage PROTO((const char *, const char *, va_list));
158 static void v_message_with_file_and_line PROTO((const char *, int, int,
159 const char *, va_list));
160 static void v_message_with_decl PROTO((tree, int, const char *, va_list));
161 static void file_and_line_for_asm PROTO((rtx, char **, int *));
162 static void v_error_with_file_and_line PROTO((const char *, int,
163 const char *, va_list));
164 static void v_error_with_decl PROTO((tree, const char *, va_list));
165 static void v_error_for_asm PROTO((rtx, const char *, va_list));
166 static void verror PROTO((const char *, va_list));
167 static void vfatal PROTO((const char *, va_list)) ATTRIBUTE_NORETURN;
168 static void v_warning_with_file_and_line PROTO ((const char *, int,
169 const char *, va_list));
170 static void v_warning_with_decl PROTO((tree, const char *, va_list));
171 static void v_warning_for_asm PROTO((rtx, const char *, va_list));
172 static void vwarning PROTO((const char *, va_list));
173 static void vpedwarn PROTO((const char *, va_list));
174 static void v_pedwarn_with_decl PROTO((tree, const char *, va_list));
175 static void v_pedwarn_with_file_and_line PROTO((const char *, int,
176 const char *, va_list));
177 static void vsorry PROTO((const char *, va_list));
178 extern void set_fatal_function PROTO((void (*)(const char *, va_list)));
179 static void float_signal PROTO((int)) ATTRIBUTE_NORETURN;
180 static void pipe_closed PROTO((int)) ATTRIBUTE_NORETURN;
181 #ifdef ASM_IDENTIFY_LANGUAGE
182 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
183 static void output_lang_identify PROTO((FILE *)) ATTRIBUTE_UNUSED;
185 static void open_dump_file PROTO((const char *, const char *));
186 static void close_dump_file PROTO((void (*) (FILE *, rtx), rtx));
187 static void dump_rtl PROTO((const char *, tree, void (*) (FILE *, rtx), rtx));
188 static void clean_dump_file PROTO((const char *));
189 static void compile_file PROTO((char *));
190 static void display_help PROTO ((void));
191 static void report_file_and_line PROTO ((const char *, int, int));
192 static void vnotice PROTO ((FILE *, const char *, va_list));
193 static void mark_file_stack PROTO ((void *));
195 static void decode_d_option PROTO ((const char *));
196 static int decode_f_option PROTO ((const char *));
197 static int decode_W_option PROTO ((const char *));
198 static int decode_g_option PROTO ((const char *));
199 static unsigned independent_decode_option PROTO ((int, char **, unsigned));
201 static void print_version PROTO((FILE *, const char *));
202 static int print_single_switch PROTO((FILE *, int, int, const char *,
203 const char *, const char *,
204 const char *, const char *));
205 static void print_switch_values PROTO((FILE *, int, int, const char *,
206 const char *, const char *));
208 /* Length of line when printing switch values. */
211 /* Name of program invoked, sans directories. */
213 const char *progname;
215 /* Copy of arguments to main. */
219 /* Name of current original source file (what was input to cpp).
220 This comes from each #-command in the actual input. */
222 char *input_filename;
224 /* Name of top-level original source file (what was input to cpp).
225 This comes from the #-command at the beginning of the actual input.
226 If there isn't any there, then this is the cc1 input file name. */
228 char *main_input_filename;
230 /* Current line number in real source file. */
234 /* Nonzero if it is unsafe to create any new pseudo registers. */
237 /* Stack of currently pending input files. */
239 struct file_stack *input_file_stack;
241 /* Incremented on each change to input_file_stack. */
242 int input_file_stack_tick;
244 /* Name to use as base of names for dump output files. */
246 const char *dump_base_name;
248 /* Bit flags that specify the machine subtype we are compiling for.
249 Bits are tested using macros TARGET_... defined in the tm.h file
250 and set by `-m...' switches. Must be defined in rtlanal.c. */
252 extern int target_flags;
254 /* Flags saying which kinds of debugging dump have been requested. */
257 int rtl_dump_and_exit = 0;
258 int jump_opt_dump = 0;
259 int addressof_dump = 0;
264 int branch_prob_dump = 0;
266 int combine_dump = 0;
267 int regmove_dump = 0;
269 int local_reg_dump = 0;
270 int global_reg_dump = 0;
272 int peephole2_dump = 0;
274 int jump2_opt_dump = 0;
276 int dbr_sched_dump = 0;
278 int flag_print_asm_name = 0;
280 int stack_reg_dump = 0;
282 #ifdef MACHINE_DEPENDENT_REORG
283 int mach_dep_reorg_dump = 0;
285 static int flag_print_mem = 0;
286 static int version_flag = 0;
287 static char * filename = 0;
288 enum graph_dump_types graph_dump_format;
290 /* Name for output file of assembly code, specified with -o. */
294 /* Value of the -G xx switch, and whether it was passed or not. */
298 /* Type(s) of debugging information we are producing (if any).
299 See flags.h for the definitions of the different possible
300 types of debugging information. */
301 enum debug_info_type write_symbols = NO_DEBUG;
303 /* Level of debugging information we are producing. See flags.h
304 for the definitions of the different possible levels. */
305 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
307 /* Nonzero means use GNU-only extensions in the generated symbolic
308 debugging information. */
309 /* Currently, this only has an effect when write_symbols is set to
310 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
311 int use_gnu_debug_info_extensions = 0;
313 /* Nonzero means do optimizations. -O.
314 Particular numeric values stand for particular amounts of optimization;
315 thus, -O2 stores 2 here. However, the optimizations beyond the basic
316 ones are not controlled directly by this variable. Instead, they are
317 controlled by individual `flag_...' variables that are defaulted
318 based on this variable. */
322 /* Nonzero means optimize for size. -Os.
323 The only valid values are zero and non-zero. When optimize_size is
324 non-zero, optimize defaults to 2, but certain individual code
325 bloating optimizations are disabled. */
327 int optimize_size = 0;
329 /* Number of error messages and warning messages so far. */
332 int warningcount = 0;
335 /* Pointer to function to compute the name to use to print a declaration.
336 DECL is the declaration in question.
337 VERBOSITY determines what information will be printed:
338 0: DECL_NAME, demangled as necessary.
339 1: and scope information.
340 2: and any other information that might be interesting, such as function
341 parameter types in C++. */
343 const char *(*decl_printable_name) PROTO ((tree, int));
345 /* Pointer to function to compute rtl for a language-specific tree code. */
347 typedef rtx (*lang_expand_expr_t)
348 PROTO ((union tree_node *, rtx, enum machine_mode,
349 enum expand_modifier modifier));
351 lang_expand_expr_t lang_expand_expr = 0;
353 tree (*lang_expand_constant) PROTO((tree)) = 0;
355 /* Pointer to function to finish handling an incomplete decl at the
356 end of compilation. */
358 void (*incomplete_decl_finalize_hook) PROTO((tree)) = 0;
360 /* Nonzero if generating code to do profiling. */
362 int profile_flag = 0;
364 /* Nonzero if generating code to do profiling on a line-by-line basis. */
366 int profile_block_flag;
368 /* Nonzero if generating code to profile program flow graph arcs. */
370 int profile_arc_flag = 0;
372 /* Nonzero if generating info for gcov to calculate line test coverage. */
374 int flag_test_coverage = 0;
376 /* Nonzero indicates that branch taken probabilities should be calculated. */
378 int flag_branch_probabilities = 0;
380 /* Nonzero for -pedantic switch: warn about anything
381 that standard spec forbids. */
385 /* Temporarily suppress certain warnings.
386 This is set while reading code from a system header file. */
388 int in_system_header = 0;
390 /* Nonzero means do stupid register allocation.
391 Currently, this is 1 if `optimize' is 0. */
393 int obey_regdecls = 0;
395 /* Don't print functions as they are compiled and don't print
396 times taken by the various passes. -quiet. */
402 /* Nonzero means `char' should be signed. */
404 int flag_signed_char;
406 /* Nonzero means give an enum type only as many bytes as it needs. */
408 int flag_short_enums;
410 /* Nonzero for -fcaller-saves: allocate values in regs that need to
411 be saved across function calls, if that produces overall better code.
412 Optional now, so people can test it. */
414 #ifdef DEFAULT_CALLER_SAVES
415 int flag_caller_saves = 1;
417 int flag_caller_saves = 0;
420 /* Nonzero if structures and unions should be returned in memory.
422 This should only be defined if compatibility with another compiler or
423 with an ABI is needed, because it results in slower code. */
425 #ifndef DEFAULT_PCC_STRUCT_RETURN
426 #define DEFAULT_PCC_STRUCT_RETURN 1
429 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
431 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
433 /* Nonzero for -fforce-mem: load memory value into a register
434 before arithmetic on it. This makes better cse but slower compilation. */
436 int flag_force_mem = 0;
438 /* Nonzero for -fforce-addr: load memory address into a register before
439 reference to memory. This makes better cse but slower compilation. */
441 int flag_force_addr = 0;
443 /* Nonzero for -fdefer-pop: don't pop args after each function call;
444 instead save them up to pop many calls' args with one insns. */
446 int flag_defer_pop = 0;
448 /* Nonzero for -ffloat-store: don't allocate floats and doubles
449 in extended-precision registers. */
451 int flag_float_store = 0;
453 /* Nonzero for -fcse-follow-jumps:
454 have cse follow jumps to do a more extensive job. */
456 int flag_cse_follow_jumps;
458 /* Nonzero for -fcse-skip-blocks:
459 have cse follow a branch around a block. */
460 int flag_cse_skip_blocks;
462 /* Nonzero for -fexpensive-optimizations:
463 perform miscellaneous relatively-expensive optimizations. */
464 int flag_expensive_optimizations;
466 /* Nonzero for -fthread-jumps:
467 have jump optimize output of loop. */
469 int flag_thread_jumps;
471 /* Nonzero enables strength-reduction in loop.c. */
473 int flag_strength_reduce = 0;
475 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
476 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
477 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
480 int flag_unroll_loops;
482 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
483 This is generally not a win. */
485 int flag_unroll_all_loops;
487 /* Nonzero forces all invariant computations in loops to be moved
490 int flag_move_all_movables = 0;
492 /* Nonzero forces all general induction variables in loops to be
495 int flag_reduce_all_givs = 0;
497 /* Nonzero to perform full register move optimization passes. This is the
500 int flag_regmove = 0;
502 /* Nonzero for -fwritable-strings:
503 store string constants in data segment and don't uniquize them. */
505 int flag_writable_strings = 0;
507 /* Nonzero means don't put addresses of constant functions in registers.
508 Used for compiling the Unix kernel, where strange substitutions are
509 done on the assembly output. */
511 int flag_no_function_cse = 0;
513 /* Nonzero for -fomit-frame-pointer:
514 don't make a frame pointer in simple functions that don't require one. */
516 int flag_omit_frame_pointer = 0;
518 /* Nonzero means place each function into its own section on those platforms
519 which support arbitrary section names and unlimited numbers of sections. */
521 int flag_function_sections = 0;
523 /* ... and similar for data. */
525 int flag_data_sections = 0;
527 /* Nonzero to inhibit use of define_optimization peephole opts. */
529 int flag_no_peephole = 0;
531 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
532 operations in the interest of optimization. For example it allows
533 GCC to assume arguments to sqrt are nonnegative numbers, allowing
534 faster code for sqrt to be generated. */
536 int flag_fast_math = 0;
538 /* Nonzero means the front end generally wants `errno' maintained by math
539 operations, like built-in SQRT, unless overridden by flag_fast_math. */
541 int flag_errno_math = 1;
543 /* 0 means straightforward implementation of complex divide acceptable.
544 1 means wide ranges of inputs must work for complex divide.
545 2 means C9X-like requirements for complex divide (not yet implemented). */
547 int flag_complex_divide_method = 0;
549 /* Nonzero means all references through pointers are volatile. */
553 /* Nonzero means treat all global and extern variables as volatile. */
555 int flag_volatile_global;
557 /* Nonzero means treat all static variables as volatile. */
559 int flag_volatile_static;
561 /* Nonzero means just do syntax checking; don't output anything. */
563 int flag_syntax_only = 0;
565 /* Nonzero means perform global cse. */
567 static int flag_gcse;
569 /* Nonzero means to use global dataflow analysis to eliminate
570 useless null pointer tests. */
572 static int flag_delete_null_pointer_checks;
574 /* Nonzero means to rerun cse after loop optimization. This increases
575 compilation time about 20% and picks up a few more common expressions. */
577 static int flag_rerun_cse_after_loop;
579 /* Nonzero means to run loop optimizations twice. */
581 int flag_rerun_loop_opt;
583 /* Nonzero for -finline-functions: ok to inline functions that look like
584 good inline candidates. */
586 int flag_inline_functions;
588 /* Nonzero for -fkeep-inline-functions: even if we make a function
589 go inline everywhere, keep its definition around for debugging
592 int flag_keep_inline_functions;
594 /* Nonzero means that functions will not be inlined. */
598 /* Nonzero means that we should emit static const variables
599 regardless of whether or not optimization is turned on. */
601 int flag_keep_static_consts = 1;
603 /* Nonzero means we should be saving declaration info into a .X file. */
605 int flag_gen_aux_info = 0;
607 /* Specified name of aux-info file. */
609 static char *aux_info_file_name;
611 /* Nonzero means make the text shared if supported. */
613 int flag_shared_data;
615 /* Nonzero means schedule into delayed branch slots if supported. */
617 int flag_delayed_branch;
619 /* Nonzero if we are compiling pure (sharable) code.
620 Value is 1 if we are doing reasonable (i.e. simple
621 offset into offset table) pic. Value is 2 if we can
622 only perform register offsets. */
626 /* Nonzero means generate extra code for exception handling and enable
627 exception handling. */
631 /* Nonzero means use the new model for exception handling. Replaces
632 -DNEW_EH_MODEL as a compile option. */
634 int flag_new_exceptions = 1;
636 /* Nonzero means generate frame unwind info table when supported */
638 int flag_unwind_tables = 0;
640 /* Nonzero means don't place uninitialized global data in common storage
645 /* Nonzero means pretend it is OK to examine bits of target floats,
646 even if that isn't true. The resulting code will have incorrect constants,
647 but the same series of instructions that the native compiler would make. */
649 int flag_pretend_float;
651 /* Nonzero means change certain warnings into errors.
652 Usually these are warnings about failure to conform to some standard. */
654 int flag_pedantic_errors = 0;
656 /* flag_schedule_insns means schedule insns within basic blocks (before
658 flag_schedule_insns_after_reload means schedule insns after
661 int flag_schedule_insns = 0;
662 int flag_schedule_insns_after_reload = 0;
664 /* The following flags have effect only for scheduling before register
667 flag_schedule_interblock means schedule insns accross basic blocks.
668 flag_schedule_speculative means allow speculative motion of non-load insns.
669 flag_schedule_speculative_load means allow speculative motion of some
671 flag_schedule_speculative_load_dangerous allows speculative motion of more
674 int flag_schedule_interblock = 1;
675 int flag_schedule_speculative = 1;
676 int flag_schedule_speculative_load = 0;
677 int flag_schedule_speculative_load_dangerous = 0;
679 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
680 by a cheaper branch, on a count register. */
681 int flag_branch_on_count_reg;
683 /* -finhibit-size-directive inhibits output of .size for ELF.
684 This is used only for compiling crtstuff.c,
685 and it may be extended to other effects
686 needed for crtstuff.c on other systems. */
687 int flag_inhibit_size_directive = 0;
689 /* -fverbose-asm causes extra commentary information to be produced in
690 the generated assembly code (to make it more readable). This option
691 is generally only of use to those who actually need to read the
692 generated assembly code (perhaps while debugging the compiler itself).
693 -fno-verbose-asm, the default, causes the extra information
694 to be omitted and is useful when comparing two assembler files. */
696 int flag_verbose_asm = 0;
698 /* -dA causes debug commentary information to be produced in
699 the generated assembly code (to make it more readable). This option
700 is generally only of use to those who actually need to read the
701 generated assembly code (perhaps while debugging the compiler itself).
702 Currently, this switch is only used by dwarfout.c; however, it is intended
703 to be a catchall for printing debug information in the assembler file. */
705 int flag_debug_asm = 0;
707 /* -fgnu-linker specifies use of the GNU linker for initializations.
708 (Or, more generally, a linker that handles initializations.)
709 -fno-gnu-linker says that collect2 will be used. */
711 int flag_gnu_linker = 0;
713 int flag_gnu_linker = 1;
716 /* Tag all structures with __attribute__(packed) */
717 int flag_pack_struct = 0;
719 /* Emit code to check for stack overflow; also may cause large objects
720 to be allocated dynamically. */
721 int flag_stack_check;
723 /* -fcheck-memory-usage causes extra code to be generated in order to check
724 memory accesses. This is used by a detector of bad memory accesses such
726 int flag_check_memory_usage = 0;
728 /* -fprefix-function-name causes function name to be prefixed. This
729 can be used with -fcheck-memory-usage to isolate code compiled with
730 -fcheck-memory-usage. */
731 int flag_prefix_function_name = 0;
733 /* 0 if pointer arguments may alias each other. True in C.
734 1 if pointer arguments may not alias each other but may alias
736 2 if pointer arguments may not alias each other and may not
737 alias global variables. True in Fortran.
738 This defaults to 0 for C. */
739 int flag_argument_noalias = 0;
741 /* Nonzero if we should do (language-dependent) alias analysis.
742 Typically, this analysis will assume that expressions of certain
743 types do not alias expressions of certain other types. Only used
744 if alias analysis (in general) is enabled. */
745 int flag_strict_aliasing = 0;
747 /* Instrument functions with calls at entry and exit, for profiling. */
748 int flag_instrument_function_entry_exit = 0;
750 /* Nonzero means ignore `#ident' directives. 0 means handle them.
751 On SVR4 targets, it also controls whether or not to emit a
752 string identifying the compiler. */
754 int flag_no_ident = 0;
756 /* This will perform a peephole pass before sched2. */
757 int flag_peephole2 = 0;
759 /* -fbounded-pointers causes gcc to compile pointers as composite
760 objects occupying three words: the pointer value, the base address
761 of the referent object, and the address immediately beyond the end
762 of the referent object. The base and extent allow us to perform
763 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
764 int flag_bounded_pointers = 0;
766 /* -fcheck-bounds causes gcc to generate array bounds checks.
767 For C, C++: defaults to value of flag_bounded_pointers.
768 For ObjC: defaults to off.
769 For Java: defaults to on.
770 For Fortran: defaults to off.
771 For CHILL: defaults to off. */
772 int flag_bounds_check = 0;
774 /* If one, renumber instruction UIDs to reduce the number of
775 unused UIDs if there are a lot of instructions. If greater than
776 one, unconditionally renumber instruction UIDs. */
777 int flag_renumber_insns = 1;
779 /* Values of the -falign-* flags: how much to align labels in code.
780 0 means `use default', 1 means `don't align'.
781 For each variable, there is an _log variant which is the power
782 of two not less than the variable, for .align output. */
789 int align_labels_log;
791 int align_functions_log;
793 /* Table of supported debugging formats. */
797 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
798 constant expression, we use NO_DEBUG in its place. */
799 enum debug_info_type debug_type;
800 int use_extensions_p;
801 const char * description;
805 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
806 "Generate default debug format output" },
807 { "gdb", NO_DEBUG, 1, "Generate default extended debug format output" },
808 #ifdef DBX_DEBUGGING_INFO
809 { "stabs", DBX_DEBUG, 0, "Generate STABS format debug output" },
810 { "stabs+", DBX_DEBUG, 1, "Generate extended STABS format debug output" },
812 #ifdef DWARF_DEBUGGING_INFO
813 { "dwarf", DWARF_DEBUG, 0, "Generate DWARF-1 format debug output"},
814 { "dwarf+", DWARF_DEBUG, 1,
815 "Generated extended DWARF-1 format debug output" },
817 #ifdef DWARF2_DEBUGGING_INFO
818 { "dwarf-2", DWARF2_DEBUG, 0, "Enable DWARF-2 debug output" },
820 #ifdef XCOFF_DEBUGGING_INFO
821 { "xcoff", XCOFF_DEBUG, 0, "Generate XCOFF format debug output" },
822 { "xcoff+", XCOFF_DEBUG, 1, "Generate extended XCOFF format debug output" },
824 #ifdef SDB_DEBUGGING_INFO
825 { "coff", SDB_DEBUG, 0, "Generate COFF format debug output" },
835 const char * description;
837 lang_independent_options;
839 /* Add or remove a leading underscore from user symbols. */
840 int flag_leading_underscore = -1;
842 /* The user symbol prefix after having resolved same. */
843 const char *user_label_prefix;
845 /* A default for same. */
846 #ifndef USER_LABEL_PREFIX
847 #define USER_LABEL_PREFIX ""
850 /* Table of language-independent -f options.
851 STRING is the option name. VARIABLE is the address of the variable.
852 ON_VALUE is the value to store in VARIABLE
853 if `-fSTRING' is seen as an option.
854 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
856 lang_independent_options f_options[] =
858 {"float-store", &flag_float_store, 1,
859 "Do not store floats in registers" },
860 {"volatile", &flag_volatile, 1,
861 "Consider all mem refs through pointers as volatile"},
862 {"volatile-global", &flag_volatile_global, 1,
863 "Consider all mem refs to global data to be volatile" },
864 {"volatile-static", &flag_volatile_static, 1,
865 "Consider all mem refs to static data to be volatile" },
866 {"defer-pop", &flag_defer_pop, 1,
867 "Defer popping functions args from stack until later" },
868 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
869 "When possible do not generate stack frames"},
870 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
871 "When running CSE, follow jumps to their targets" },
872 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
873 "When running CSE, follow conditional jumps" },
874 {"expensive-optimizations", &flag_expensive_optimizations, 1,
875 "Perform a number of minor, expensive optimisations" },
876 {"thread-jumps", &flag_thread_jumps, 1,
877 "Perform jump threading optimisations"},
878 {"strength-reduce", &flag_strength_reduce, 1,
879 "Perform strength reduction optimisations" },
880 {"unroll-loops", &flag_unroll_loops, 1,
881 "Perform loop unrolling when iteration count is known" },
882 {"unroll-all-loops", &flag_unroll_all_loops, 1,
883 "Perform loop unrolling for all loops" },
884 {"move-all-movables", &flag_move_all_movables, 1,
885 "Force all loop invariant computations out of loops" },
886 {"reduce-all-givs", &flag_reduce_all_givs, 1,
887 "Strength reduce all loop general induction variables" },
888 {"writable-strings", &flag_writable_strings, 1,
889 "Store strings in writable data section" },
890 {"peephole", &flag_no_peephole, 0,
891 "Enable machine specific peephole optimisations" },
892 {"force-mem", &flag_force_mem, 1,
893 "Copy memory operands into registers before using" },
894 {"force-addr", &flag_force_addr, 1,
895 "Copy memory address constants into regs before using" },
896 {"function-cse", &flag_no_function_cse, 0,
897 "Allow function addresses to be held in registers" },
898 {"inline-functions", &flag_inline_functions, 1,
899 "Integrate simple functions into their callers" },
900 {"keep-inline-functions", &flag_keep_inline_functions, 1,
901 "Generate code for funcs even if they are fully inlined" },
902 {"inline", &flag_no_inline, 0,
903 "Pay attention to the 'inline' keyword"},
904 {"keep-static-consts", &flag_keep_static_consts, 1,
905 "Emit static const variables even if they are not used" },
906 {"syntax-only", &flag_syntax_only, 1,
907 "Check for syntax errors, then stop" },
908 {"shared-data", &flag_shared_data, 1,
909 "Mark data as shared rather than private" },
910 {"caller-saves", &flag_caller_saves, 1,
911 "Enable saving registers around function calls" },
912 {"pcc-struct-return", &flag_pcc_struct_return, 1,
913 "Return 'short' aggregates in memory, not registers" },
914 {"reg-struct-return", &flag_pcc_struct_return, 0,
915 "Return 'short' aggregates in registers" },
916 {"delayed-branch", &flag_delayed_branch, 1,
917 "Attempt to fill delay slots of branch instructions" },
918 {"gcse", &flag_gcse, 1,
919 "Perform the global common subexpression elimination" },
920 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
921 "Run CSE pass after loop optimisations"},
922 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
923 "Run the loop optimiser twice"},
924 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
925 "Delete useless null pointer checks" },
926 {"pretend-float", &flag_pretend_float, 1,
927 "Pretend that host and target use the same FP format"},
928 {"schedule-insns", &flag_schedule_insns, 1,
929 "Reschedule instructions to avoid pipeline stalls"},
930 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
931 "Run two passes of the instruction scheduler"},
932 {"sched-interblock",&flag_schedule_interblock, 1,
933 "Enable scheduling across basic blocks" },
934 {"sched-spec",&flag_schedule_speculative, 1,
935 "Allow speculative motion of non-loads" },
936 {"sched-spec-load",&flag_schedule_speculative_load, 1,
937 "Allow speculative motion of some loads" },
938 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
939 "Allow speculative motion of more loads" },
940 {"branch-count-reg",&flag_branch_on_count_reg, 1,
941 "Replace add,compare,branch with branch on count reg"},
942 {"pic", &flag_pic, 1,
943 "Generate position independent code, if possible"},
944 {"PIC", &flag_pic, 2, ""},
945 {"exceptions", &flag_exceptions, 1,
946 "Enable exception handling" },
947 {"new-exceptions", &flag_new_exceptions, 1,
948 "Use the new model for exception handling" },
949 {"unwind-tables", &flag_unwind_tables, 1,
950 "Just generate unwind tables for exception handling" },
951 {"sjlj-exceptions", &exceptions_via_longjmp, 1,
952 "Use setjmp/longjmp to handle exceptions" },
953 {"asynchronous-exceptions", &asynchronous_exceptions, 1,
954 "Support asynchronous exceptions" },
955 {"profile-arcs", &profile_arc_flag, 1,
956 "Insert arc based program profiling code" },
957 {"test-coverage", &flag_test_coverage, 1,
958 "Create data files needed by gcov" },
959 {"branch-probabilities", &flag_branch_probabilities, 1,
960 "Use profiling information for branch probabilities" },
961 {"fast-math", &flag_fast_math, 1,
962 "Improve FP speed by violating ANSI & IEEE rules" },
963 {"common", &flag_no_common, 0,
964 "Do not put unitialised globals in the common section" },
965 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
966 "Do not generate .size directives" },
967 {"function-sections", &flag_function_sections, 1,
968 "place each function into its own section" },
969 {"data-sections", &flag_data_sections, 1,
970 "place data items into their own section" },
971 {"verbose-asm", &flag_verbose_asm, 1,
972 "Add extra commentry to assembler output"},
973 {"gnu-linker", &flag_gnu_linker, 1,
974 "Output GNU ld formatted global initialisers"},
975 {"regmove", &flag_regmove, 1,
976 "Enables a register move optimisation"},
977 {"optimize-register-move", &flag_regmove, 1,
978 "Do the full regmove optimization pass"},
979 {"pack-struct", &flag_pack_struct, 1,
980 "Pack structure members together without holes" },
981 {"stack-check", &flag_stack_check, 1,
982 "Insert stack checking code into the program" },
983 {"argument-alias", &flag_argument_noalias, 0,
984 "Specify that arguments may alias each other & globals"},
985 {"argument-noalias", &flag_argument_noalias, 1,
986 "Assume arguments may alias globals but not each other"},
987 {"argument-noalias-global", &flag_argument_noalias, 2,
988 "Assume arguments do not alias each other or globals" },
989 {"strict-aliasing", &flag_strict_aliasing, 1,
990 "Assume strict aliasing rules apply" },
991 {"align-loops", &align_loops, 0,
992 "Align the start of loops" },
993 {"align-jumps", &align_jumps, 0,
994 "Align labels which are only reached by jumping" },
995 {"align-labels", &align_labels, 0,
996 "Align all labels" },
997 {"align-functions", &align_functions, 0,
998 "Align the start of functions" },
999 {"check-memory-usage", &flag_check_memory_usage, 1,
1000 "Generate code to check every memory access" },
1001 {"prefix-function-name", &flag_prefix_function_name, 1,
1002 "Add a prefix to all function names" },
1003 {"dump-unnumbered", &flag_dump_unnumbered, 1,
1004 "Suppress output of instruction numbers and line number notes in debugging dumps"},
1005 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
1006 "Instrument function entry/exit with profiling calls"},
1007 {"leading-underscore", &flag_leading_underscore, 1,
1008 "External symbols have a leading underscore" },
1009 {"ident", &flag_no_ident, 0,
1010 "Process #ident directives"},
1011 { "peephole2", &flag_peephole2, 1,
1012 "Enables an rtl peephole pass run before sched2" },
1013 {"math-errno", &flag_errno_math, 1,
1014 "Set errno after built-in math functions"},
1015 {"bounded-pointers", &flag_bounded_pointers, 1,
1016 "Compile pointers as triples: value, base & end" },
1017 {"bounds-check", &flag_bounds_check, 1,
1018 "Generate code to check bounds before dereferencing pointers and arrays" }
1021 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1023 /* Table of language-specific options. */
1025 static struct lang_opt
1027 const char * option;
1028 const char * description;
1030 documented_lang_options[] =
1032 /* In order not to overload the --help output, the convention
1033 used here is to only describe those options which are not
1034 enabled by default. */
1036 { "-ansi", "Compile just for ANSI C" },
1037 { "-fallow-single-precision",
1038 "Do not promote floats to double if using -traditional" },
1039 { "-std= ", "Determine language standard"},
1041 { "-fsigned-bitfields", "" },
1042 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1043 { "-fno-signed-bitfields", "" },
1044 { "-fno-unsigned-bitfields","" },
1045 { "-fsigned-char", "Make 'char' be signed by default"},
1046 { "-funsigned-char", "Make 'char' be unsigned by default"},
1047 { "-fno-signed-char", "" },
1048 { "-fno-unsigned-char", "" },
1050 { "-ftraditional", "" },
1051 { "-traditional", "Attempt to support traditional K&R style C"},
1052 { "-fnotraditional", "" },
1053 { "-fno-traditional", "" },
1056 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1057 { "-fbuiltin", "" },
1058 { "-fno-builtin", "Do not recognise any built in functions" },
1059 { "-fhosted", "Assume normal C execution environment" },
1060 { "-fno-hosted", "" },
1062 "Assume that standard libraries & main might not exist" },
1063 { "-fno-freestanding", "" },
1064 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1065 { "-fno-cond-mismatch", "" },
1066 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1067 { "-fno-dollars-in-identifiers", "" },
1068 { "-fpreprocessed", "" },
1069 { "-fno-preprocessed", "" },
1070 { "-fshort-double", "Use the same size for double as for float" },
1071 { "-fno-short-double", "" },
1072 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1073 { "-fno-short-enums", "" },
1074 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1075 { "-fno-short-wchar", "" },
1077 { "-Wall", "Enable most warning messages" },
1078 { "-Wbad-function-cast",
1079 "Warn about casting functions to incompatible types" },
1080 { "-Wno-bad-function-cast", "" },
1081 { "-Wmissing-noreturn",
1082 "Warn about functions which might be candidates for attribute noreturn" },
1083 { "-Wno-missing-noreturn", "" },
1084 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1085 { "-Wno-cast-qual", "" },
1086 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1087 { "-Wno-char-subscripts", "" },
1088 { "-Wcomment", "Warn if nested comments are detected" },
1089 { "-Wno-comment", "" },
1090 { "-Wcomments", "Warn if nested comments are detected" },
1091 { "-Wno-comments", "" },
1092 { "-Wconversion", "Warn about possibly confusing type conversions" },
1093 { "-Wno-conversion", "" },
1094 { "-Wformat", "Warn about printf format anomalies" },
1095 { "-Wno-format", "" },
1096 { "-Wimplicit-function-declaration",
1097 "Warn about implicit function declarations" },
1098 { "-Wno-implicit-function-declaration", "" },
1099 { "-Werror-implicit-function-declaration", "" },
1100 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1101 { "-Wno-implicit-int", "" },
1102 { "-Wimplicit", "" },
1103 { "-Wno-implicit", "" },
1104 { "-Wimport", "Warn about the use of the #import directive" },
1105 { "-Wno-import", "" },
1106 { "-Wlong-long","" },
1107 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1108 { "-Wmain", "Warn about suspicious declarations of main" },
1109 { "-Wno-main", "" },
1110 { "-Wmissing-braces",
1111 "Warn about possibly missing braces around initialisers" },
1112 { "-Wno-missing-braces", "" },
1113 { "-Wmissing-declarations",
1114 "Warn about global funcs without previous declarations"},
1115 { "-Wno-missing-declarations", "" },
1116 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1117 { "-Wno-missing-prototypes", "" },
1118 { "-Wmultichar", "Warn about use of multicharacter literals"},
1119 { "-Wno-multichar", "" },
1120 { "-Wnested-externs", "Warn about externs not at file scope level" },
1121 { "-Wno-nested-externs", "" },
1122 { "-Wparentheses", "Warn about possible missing parentheses" },
1123 { "-Wno-parentheses", "" },
1124 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1125 { "-Wno-pointer-arith", "" },
1126 { "-Wredundant-decls",
1127 "Warn about multiple declarations of the same object" },
1128 { "-Wno-redundant-decls", "" },
1129 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1130 { "-Wno-sign-compare", "" },
1131 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1132 { "-Wno-float-equal", "" },
1133 { "-Wunknown-pragmas", "Warn about unrecognised pragmas" },
1134 { "-Wno-unknown-pragmas", "" },
1135 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1136 { "-Wno-strict-prototypes", "" },
1137 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1138 { "-Wno-traditional", "" },
1139 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1140 { "-Wno-trigraphs", "" },
1142 { "-Wno-undef", "" },
1143 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1144 { "-Wno-write-strings", "" },
1146 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1148 /* These are for Objective C. */
1149 DEFINE_LANG_NAME ("Objective C")
1151 { "-lang-objc", "" },
1152 { "-gen-decls", "Dump decls to a .decl file" },
1153 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1154 { "-fno-gnu-runtime", "" },
1155 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1156 { "-fno-next-runtime", "" },
1157 { "-Wselector", "Warn if a selector has multiple methods" },
1158 { "-Wno-selector", "" },
1159 { "-Wprotocol", "" },
1160 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1161 { "-print-objc-runtime-info",
1162 "Generate C header of platform specific features" },
1164 #include "options.h"
1168 /* Here is a table, controlled by the tm.h file, listing each -m switch
1169 and which bits in `target_switches' it should set or clear.
1170 If VALUE is positive, it is bits to set.
1171 If VALUE is negative, -VALUE is bits to clear.
1172 (The sign bit is not used so there is no confusion.) */
1178 const char * description;
1180 target_switches [] = TARGET_SWITCHES;
1182 /* This table is similar, but allows the switch to have a value. */
1184 #ifdef TARGET_OPTIONS
1187 const char * prefix;
1188 const char ** variable;
1189 const char * description;
1191 target_options [] = TARGET_OPTIONS;
1194 /* Options controlling warnings */
1196 /* Don't print warning messages. -w. */
1198 int inhibit_warnings = 0;
1200 /* Print various extra warnings. -W. */
1202 int extra_warnings = 0;
1204 /* Treat warnings as errors. -Werror. */
1206 int warnings_are_errors = 0;
1208 /* Nonzero to warn about unused local variables. */
1212 /* Nonzero to warn about code which is never reached. */
1214 int warn_notreached;
1216 /* Nonzero to warn about variables used before they are initialized. */
1218 int warn_uninitialized;
1220 /* Nonzero means warn about all declarations which shadow others. */
1224 /* Warn if a switch on an enum fails to have a case for every enum value. */
1228 /* Nonzero means warn about function definitions that default the return type
1229 or that use a null return and have a return-type other than void. */
1231 int warn_return_type;
1233 /* Nonzero means warn about pointer casts that increase the required
1234 alignment of the target type (and might therefore lead to a crash
1235 due to a misaligned access). */
1237 int warn_cast_align;
1239 /* Nonzero means warn about any identifiers that match in the first N
1240 characters. The value N is in `id_clash_len'. */
1243 unsigned id_clash_len;
1245 /* Nonzero means warn about any objects definitions whose size is larger
1246 than N bytes. Also want about function definitions whose returned
1247 values are larger than N bytes. The value N is in `larger_than_size'. */
1249 int warn_larger_than;
1250 unsigned larger_than_size;
1252 /* Nonzero means warn if inline function is too large. */
1256 /* Warn if a function returns an aggregate,
1257 since there are often incompatible calling conventions for doing this. */
1259 int warn_aggregate_return;
1261 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1265 /* Warn when gcc pads a structure to an alignment boundary. */
1269 /* Likewise for -W. */
1271 lang_independent_options W_options[] =
1273 {"unused", &warn_unused, 1, "Warn when a variable is unused" },
1274 {"error", &warnings_are_errors, 1, ""},
1275 {"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
1276 {"switch", &warn_switch, 1,
1277 "Warn about enumerated switches missing a specific case" },
1278 {"aggregate-return", &warn_aggregate_return, 1,
1279 "Warn about returning structures, unions or arrays" },
1280 {"cast-align", &warn_cast_align, 1,
1281 "Warn about pointer casts which increase alignment" },
1282 {"unreachable-code", &warn_notreached, 1,
1283 "Warn about code that will never be executed" },
1284 {"uninitialized", &warn_uninitialized, 1,
1285 "Warn about unitialized automatic variables"},
1286 {"inline", &warn_inline, 1,
1287 "Warn when an inlined function cannot be inlined"},
1288 {"packed", &warn_packed, 1,
1289 "Warn when the packed attribute has no effect on struct layout"},
1290 {"padded", &warn_padded, 1,
1291 "Warn when padding is required to align struct members"}
1294 /* Output files for assembler code (real compiler output)
1295 and debugging dumps. */
1298 FILE *aux_info_file;
1299 FILE *rtl_dump_file = NULL;
1301 /* Decode the string P as an integral parameter.
1302 If the string is indeed an integer return its numeric value else
1303 issue an Invalid Option error for the option PNAME and return DEFVAL.
1304 If PNAME is zero just return DEFVAL, do not call error. */
1307 read_integral_parameter (p, pname, defval)
1312 const char *endp = p;
1316 if (*endp >= '0' && *endp <= '9')
1325 error ("Invalid option `%s'", pname);
1333 /* Time accumulators, to count the total time spent in various passes. */
1337 int integration_time;
1343 int branch_prob_time;
1348 int local_alloc_time;
1349 int global_alloc_time;
1354 int shorten_branch_time;
1362 /* Return time used so far, in microseconds. */
1372 #else /* not BeOS */
1373 #if defined (_WIN32) && !defined (__CYGWIN__)
1377 return (clock() * 1000);
1378 #else /* not _WIN32 */
1384 tick = 1000000 / sysconf(_SC_CLK_TCK);
1386 return (tms.tms_utime + tms.tms_stime) * tick;
1392 # if HAVE_SYSCONF && defined _SC_CLK_TCK
1393 # define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
1396 # define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
1398 # define TICKS_PER_SECOND HZ /* traditional UNIX */
1402 return (tms.tms_utime + tms.tms_stime) * (1000000 / TICKS_PER_SECOND);
1407 struct rusage rusage;
1408 getrusage (0, &rusage);
1409 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
1410 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
1417 int proc_system_time;
1418 int child_user_time;
1419 int child_system_time;
1421 times ((void *) &vms_times);
1422 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
1426 #endif /* _SC_CLK_TCK */
1428 #endif /* __BEOS__ */
1431 #define TIMEVAR(VAR, BODY) \
1432 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
1435 print_time (str, total)
1440 "time in %s: %d.%06d (%.0f%%)\n",
1441 str, total / 1000000, total % 1000000,
1442 (double)total / (double)all_time * 100.0);
1445 /* Count an error or warning. Return 1 if the message should be printed. */
1448 count_error (warningp)
1451 if (warningp && inhibit_warnings)
1454 if (warningp && !warnings_are_errors)
1458 static int warning_message = 0;
1460 if (warningp && !warning_message)
1462 notice ("%s: warnings being treated as errors\n", progname);
1463 warning_message = 1;
1471 /* Print a fatal error message. NAME is the text.
1472 Also include a system error message based on `errno'. */
1475 pfatal_with_name (name)
1478 fprintf (stderr, "%s: ", progname);
1480 exit (FATAL_EXIT_CODE);
1484 fatal_io_error (name)
1487 notice ("%s: %s: I/O error\n", progname, name);
1488 exit (FATAL_EXIT_CODE);
1491 /* This is the default decl_printable_name function. */
1494 decl_name (decl, verbosity)
1496 int verbosity ATTRIBUTE_UNUSED;
1498 return IDENTIFIER_POINTER (DECL_NAME (decl));
1501 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1506 struct file_stack *stack = *(struct file_stack **)p;
1508 /* We're only called for input_file_stack, so we can mark the current
1509 input_filename here as well. */
1510 ggc_mark_string (main_input_filename);
1511 ggc_mark_string (input_filename);
1515 ggc_mark_string (stack->name);
1516 stack = stack->next;
1520 static int need_error_newline;
1522 /* Function of last error message;
1523 more generally, function such that if next error message is in it
1524 then we don't have to mention the function name. */
1525 static tree last_error_function = NULL;
1527 /* Used to detect when input_file_stack has changed since last described. */
1528 static int last_error_tick;
1530 /* Called when the start of a function definition is parsed,
1531 this function prints on stderr the name of the function. */
1534 announce_function (decl)
1539 if (rtl_dump_and_exit)
1540 fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
1542 fprintf (stderr, " %s", (*decl_printable_name) (decl, 2));
1544 need_error_newline = 1;
1545 last_error_function = current_function_decl;
1549 /* The default function to print out name of current function that caused
1553 default_print_error_function (file)
1556 if (last_error_function != current_function_decl)
1559 fprintf (stderr, "%s: ", file);
1561 if (current_function_decl == NULL)
1562 notice ("At top level:\n");
1565 if (TREE_CODE (TREE_TYPE (current_function_decl)) == METHOD_TYPE)
1566 notice ("In method `%s':\n",
1567 (*decl_printable_name) (current_function_decl, 2));
1569 notice ("In function `%s':\n",
1570 (*decl_printable_name) (current_function_decl, 2));
1573 last_error_function = current_function_decl;
1577 /* Called by report_error_function to print out function name.
1578 * Default may be overridden by language front-ends. */
1580 void (*print_error_function) PROTO((const char *)) =
1581 default_print_error_function;
1583 /* Prints out, if necessary, the name of the current function
1584 that caused an error. Called from all error and warning functions.
1585 We ignore the FILE parameter, as it cannot be relied upon. */
1588 report_error_function (file)
1589 const char *file ATTRIBUTE_UNUSED;
1591 struct file_stack *p;
1593 if (need_error_newline)
1595 fprintf (stderr, "\n");
1596 need_error_newline = 0;
1599 if (input_file_stack && input_file_stack->next != 0
1600 && input_file_stack_tick != last_error_tick)
1602 for (p = input_file_stack->next; p; p = p->next)
1603 if (p == input_file_stack->next)
1604 notice ("In file included from %s:%d", p->name, p->line);
1606 notice (",\n from %s:%d", p->name, p->line);
1607 fprintf (stderr, ":\n");
1608 last_error_tick = input_file_stack_tick;
1611 (*print_error_function) (input_filename);
1614 /* Print a message. */
1617 vnotice (file, msgid, ap)
1622 vfprintf (file, _(msgid), ap);
1626 notice VPROTO((const char *msgid, ...))
1628 #ifndef ANSI_PROTOTYPES
1633 VA_START (ap, msgid);
1635 #ifndef ANSI_PROTOTYPES
1636 msgid = va_arg (ap, char *);
1639 vnotice (stderr, msgid, ap);
1644 fnotice VPROTO((FILE *file, const char *msgid, ...))
1646 #ifndef ANSI_PROTOTYPES
1652 VA_START (ap, msgid);
1654 #ifndef ANSI_PROTOTYPES
1655 file = va_arg (ap, FILE *);
1656 msgid = va_arg (ap, const char *);
1659 vnotice (file, msgid, ap);
1663 /* Report FILE and LINE (or program name), and optionally just WARN. */
1666 report_file_and_line (file, line, warn)
1672 fprintf (stderr, "%s:%d: ", file, line);
1674 fprintf (stderr, "%s: ", progname);
1677 notice ("warning: ");
1680 /* Print a message. */
1683 vmessage (prefix, msgid, ap)
1689 fprintf (stderr, "%s: ", prefix);
1691 vfprintf (stderr, msgid, ap);
1694 /* Print a message relevant to line LINE of file FILE. */
1697 v_message_with_file_and_line (file, line, warn, msgid, ap)
1704 report_file_and_line (file, line, warn);
1705 vnotice (stderr, msgid, ap);
1706 fputc ('\n', stderr);
1709 /* Print a message relevant to the given DECL. */
1712 v_message_with_decl (decl, warn, msgid, ap)
1720 report_file_and_line (DECL_SOURCE_FILE (decl),
1721 DECL_SOURCE_LINE (decl), warn);
1723 /* Do magic to get around lack of varargs support for insertion
1724 of arguments into existing list. We know that the decl is first;
1725 we ass_u_me that it will be printed with "%s". */
1727 for (p = _(msgid); *p; ++p)
1731 if (*(p + 1) == '%')
1733 else if (*(p + 1) != 's')
1740 if (p > _(msgid)) /* Print the left-hand substring. */
1742 char fmt[sizeof "%.255s"];
1743 long width = p - _(msgid);
1745 if (width > 255L) width = 255L; /* arbitrary */
1746 sprintf (fmt, "%%.%lds", width);
1747 fprintf (stderr, fmt, _(msgid));
1750 if (*p == '%') /* Print the name. */
1752 const char *n = (DECL_NAME (decl)
1753 ? (*decl_printable_name) (decl, 2)
1759 if (ISALPHA (*(p - 1) & 0xFF))
1764 if (*p) /* Print the rest of the message. */
1765 vmessage ((char *)NULL, p, ap);
1767 fputc ('\n', stderr);
1770 /* Figure file and line of the given INSN. */
1773 file_and_line_for_asm (insn, pfile, pline)
1778 rtx body = PATTERN (insn);
1781 /* Find the (or one of the) ASM_OPERANDS in the insn. */
1782 if (GET_CODE (body) == SET && GET_CODE (SET_SRC (body)) == ASM_OPERANDS)
1783 asmop = SET_SRC (body);
1784 else if (GET_CODE (body) == ASM_OPERANDS)
1786 else if (GET_CODE (body) == PARALLEL
1787 && GET_CODE (XVECEXP (body, 0, 0)) == SET)
1788 asmop = SET_SRC (XVECEXP (body, 0, 0));
1789 else if (GET_CODE (body) == PARALLEL
1790 && GET_CODE (XVECEXP (body, 0, 0)) == ASM_OPERANDS)
1791 asmop = XVECEXP (body, 0, 0);
1797 *pfile = ASM_OPERANDS_SOURCE_FILE (asmop);
1798 *pline = ASM_OPERANDS_SOURCE_LINE (asmop);
1802 *pfile = input_filename;
1807 /* Report an error at line LINE of file FILE. */
1810 v_error_with_file_and_line (file, line, msgid, ap)
1817 report_error_function (file);
1818 v_message_with_file_and_line (file, line, 0, msgid, ap);
1822 error_with_file_and_line VPROTO((const char *file, int line,
1823 const char *msgid, ...))
1825 #ifndef ANSI_PROTOTYPES
1832 VA_START (ap, msgid);
1834 #ifndef ANSI_PROTOTYPES
1835 file = va_arg (ap, const char *);
1836 line = va_arg (ap, int);
1837 msgid = va_arg (ap, const char *);
1840 v_error_with_file_and_line (file, line, msgid, ap);
1844 /* Report an error at the declaration DECL.
1845 MSGID is a format string which uses %s to substitute the declaration
1846 name; subsequent substitutions are a la printf. */
1849 v_error_with_decl (decl, msgid, ap)
1855 report_error_function (DECL_SOURCE_FILE (decl));
1856 v_message_with_decl (decl, 0, msgid, ap);
1860 error_with_decl VPROTO((tree decl, const char *msgid, ...))
1862 #ifndef ANSI_PROTOTYPES
1868 VA_START (ap, msgid);
1870 #ifndef ANSI_PROTOTYPES
1871 decl = va_arg (ap, tree);
1872 msgid = va_arg (ap, const char *);
1875 v_error_with_decl (decl, msgid, ap);
1879 /* Report an error at the line number of the insn INSN.
1880 This is used only when INSN is an `asm' with operands,
1881 and each ASM_OPERANDS records its own source file and line. */
1884 v_error_for_asm (insn, msgid, ap)
1893 file_and_line_for_asm (insn, &file, &line);
1894 report_error_function (file);
1895 v_message_with_file_and_line (file, line, 0, msgid, ap);
1899 error_for_asm VPROTO((rtx insn, const char *msgid, ...))
1901 #ifndef ANSI_PROTOTYPES
1907 VA_START (ap, msgid);
1909 #ifndef ANSI_PROTOTYPES
1910 insn = va_arg (ap, rtx);
1911 msgid = va_arg (ap, const char *);
1914 v_error_for_asm (insn, msgid, ap);
1918 /* Report an error at the current line number. */
1925 v_error_with_file_and_line (input_filename, lineno, msgid, ap);
1929 error VPROTO((const char *msgid, ...))
1931 #ifndef ANSI_PROTOTYPES
1936 VA_START (ap, msgid);
1938 #ifndef ANSI_PROTOTYPES
1939 msgid = va_arg (ap, const char *);
1946 /* Report a fatal error at the current line number. Allow a front end to
1947 intercept the message. */
1949 static void (*fatal_function) PROTO ((const char *, va_list));
1951 /* Set the function to call when a fatal error occurs. */
1954 set_fatal_function (f)
1955 void (*f) PROTO ((const char *, va_list));
1965 if (fatal_function != 0)
1966 (*fatal_function) (_(msgid), ap);
1969 exit (FATAL_EXIT_CODE);
1973 fatal VPROTO((const char *msgid, ...))
1975 #ifndef ANSI_PROTOTYPES
1980 VA_START (ap, msgid);
1982 #ifndef ANSI_PROTOTYPES
1983 msgid = va_arg (ap, const char *);
1991 _fatal_insn (msgid, insn, file, line, function)
1996 const char *function;
1998 error ("%s", msgid);
2000 fancy_abort (file, line, function);
2004 _fatal_insn_not_found (insn, file, line, function)
2008 const char *function;
2010 if (INSN_CODE (insn) < 0)
2011 _fatal_insn ("Unrecognizable insn:", insn, file, line, function);
2013 _fatal_insn ("Insn does not satisfy its constraints:",
2014 insn, file, line, function);
2017 /* Report a warning at line LINE of file FILE. */
2020 v_warning_with_file_and_line (file, line, msgid, ap)
2026 if (count_error (1))
2028 report_error_function (file);
2029 v_message_with_file_and_line (file, line, 1, msgid, ap);
2034 warning_with_file_and_line VPROTO((const char *file, int line,
2035 const char *msgid, ...))
2037 #ifndef ANSI_PROTOTYPES
2044 VA_START (ap, msgid);
2046 #ifndef ANSI_PROTOTYPES
2047 file = va_arg (ap, const char *);
2048 line = va_arg (ap, int);
2049 msgid = va_arg (ap, const char *);
2052 v_warning_with_file_and_line (file, line, msgid, ap);
2056 /* Report a warning at the declaration DECL.
2057 MSGID is a format string which uses %s to substitute the declaration
2058 name; subsequent substitutions are a la printf. */
2061 v_warning_with_decl (decl, msgid, ap)
2066 if (count_error (1))
2068 report_error_function (DECL_SOURCE_FILE (decl));
2069 v_message_with_decl (decl, 1, msgid, ap);
2074 warning_with_decl VPROTO((tree decl, const char *msgid, ...))
2076 #ifndef ANSI_PROTOTYPES
2082 VA_START (ap, msgid);
2084 #ifndef ANSI_PROTOTYPES
2085 decl = va_arg (ap, tree);
2086 msgid = va_arg (ap, const char *);
2089 v_warning_with_decl (decl, msgid, ap);
2093 /* Report a warning at the line number of the insn INSN.
2094 This is used only when INSN is an `asm' with operands,
2095 and each ASM_OPERANDS records its own source file and line. */
2098 v_warning_for_asm (insn, msgid, ap)
2103 if (count_error (1))
2108 file_and_line_for_asm (insn, &file, &line);
2109 report_error_function (file);
2110 v_message_with_file_and_line (file, line, 1, msgid, ap);
2115 warning_for_asm VPROTO((rtx insn, const char *msgid, ...))
2117 #ifndef ANSI_PROTOTYPES
2123 VA_START (ap, msgid);
2125 #ifndef ANSI_PROTOTYPES
2126 insn = va_arg (ap, rtx);
2127 msgid = va_arg (ap, const char *);
2130 v_warning_for_asm (insn, msgid, ap);
2134 /* Report a warning at the current line number. */
2137 vwarning (msgid, ap)
2141 v_warning_with_file_and_line (input_filename, lineno, msgid, ap);
2145 warning VPROTO((const char *msgid, ...))
2147 #ifndef ANSI_PROTOTYPES
2152 VA_START (ap, msgid);
2154 #ifndef ANSI_PROTOTYPES
2155 msgid = va_arg (ap, const char *);
2158 vwarning (msgid, ap);
2162 /* These functions issue either warnings or errors depending on
2163 -pedantic-errors. */
2166 vpedwarn (msgid, ap)
2170 if (flag_pedantic_errors)
2173 vwarning (msgid, ap);
2177 pedwarn VPROTO((const char *msgid, ...))
2179 #ifndef ANSI_PROTOTYPES
2184 VA_START (ap, msgid);
2186 #ifndef ANSI_PROTOTYPES
2187 msgid = va_arg (ap, const char *);
2190 vpedwarn (msgid, ap);
2195 v_pedwarn_with_decl (decl, msgid, ap)
2200 /* We don't want -pedantic-errors to cause the compilation to fail from
2201 "errors" in system header files. Sometimes fixincludes can't fix what's
2202 broken (eg: unsigned char bitfields - fixing it may change the alignment
2203 which will cause programs to mysteriously fail because the C library
2204 or kernel uses the original layout). There's no point in issuing a
2205 warning either, it's just unnecessary noise. */
2207 if (! DECL_IN_SYSTEM_HEADER (decl))
2209 if (flag_pedantic_errors)
2210 v_error_with_decl (decl, msgid, ap);
2212 v_warning_with_decl (decl, msgid, ap);
2217 pedwarn_with_decl VPROTO((tree decl, const char *msgid, ...))
2219 #ifndef ANSI_PROTOTYPES
2225 VA_START (ap, msgid);
2227 #ifndef ANSI_PROTOTYPES
2228 decl = va_arg (ap, tree);
2229 msgid = va_arg (ap, const char *);
2232 v_pedwarn_with_decl (decl, msgid, ap);
2237 v_pedwarn_with_file_and_line (file, line, msgid, ap)
2243 if (flag_pedantic_errors)
2244 v_error_with_file_and_line (file, line, msgid, ap);
2246 v_warning_with_file_and_line (file, line, msgid, ap);
2250 pedwarn_with_file_and_line VPROTO((const char *file, int line,
2251 const char *msgid, ...))
2253 #ifndef ANSI_PROTOTYPES
2260 VA_START (ap, msgid);
2262 #ifndef ANSI_PROTOTYPES
2263 file = va_arg (ap, const char *);
2264 line = va_arg (ap, int);
2265 msgid = va_arg (ap, const char *);
2268 v_pedwarn_with_file_and_line (file, line, msgid, ap);
2272 /* Apologize for not implementing some feature. */
2281 fprintf (stderr, "%s:%d: ", input_filename, lineno);
2283 fprintf (stderr, "%s: ", progname);
2284 notice ("sorry, not implemented: ");
2285 vnotice (stderr, msgid, ap);
2286 fputc ('\n', stderr);
2290 sorry VPROTO((const char *msgid, ...))
2292 #ifndef ANSI_PROTOTYPES
2297 VA_START (ap, msgid);
2299 #ifndef ANSI_PROTOTYPES
2300 msgid = va_arg (ap, const char *);
2308 /* This calls abort and is used to avoid problems when abort if a macro.
2309 It is used when we need to pass the address of abort. */
2317 /* When `malloc.c' is compiled with `rcheck' defined,
2318 it calls this function to report clobberage. */
2322 const char * s ATTRIBUTE_UNUSED;
2327 /* Return the logarithm of X, base 2, considering X unsigned,
2328 if X is a power of 2. Otherwise, returns -1.
2330 This should be used via the `exact_log2' macro. */
2334 register unsigned HOST_WIDE_INT x;
2336 register int log = 0;
2337 /* Test for 0 or a power of 2. */
2338 if (x == 0 || x != (x & -x))
2340 while ((x >>= 1) != 0)
2345 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
2346 If X is 0, return -1.
2348 This should be used via the floor_log2 macro. */
2352 register unsigned HOST_WIDE_INT x;
2354 register int log = -1;
2361 static int float_handler_set;
2363 jmp_buf float_handler;
2365 /* Signals actually come here. */
2368 float_signal (signo)
2369 /* If this is missing, some compilers complain. */
2370 int signo ATTRIBUTE_UNUSED;
2372 if (float_handled == 0)
2374 #if defined (USG) || defined (hpux)
2375 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
2378 signal (SIGFPE, float_signal);
2379 longjmp (float_handler, 1);
2382 /* Specify where to longjmp to when a floating arithmetic error happens.
2383 If HANDLER is 0, it means don't handle the errors any more. */
2386 set_float_handler (handler)
2389 float_handled = (handler != 0);
2391 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
2393 if (float_handled && ! float_handler_set)
2395 signal (SIGFPE, float_signal);
2396 float_handler_set = 1;
2400 /* This is a wrapper function for code which might elicit an
2401 arithmetic exception. That code should be passed in as a function
2402 pointer FN, and one argument DATA. DATA is usually a struct which
2403 contains the real input and output for function FN. This function
2404 returns 0 (failure) if longjmp was called (i.e. an exception
2405 occured.) It returns 1 (success) otherwise. */
2408 do_float_handler (fn, data)
2409 void (*fn) PROTO ((PTR));
2416 /* We got here via longjmp() caused by an exception in function fn() */
2417 set_float_handler (NULL);
2421 set_float_handler (buf);
2423 set_float_handler (NULL);
2427 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
2428 error happens, pushing the previous specification into OLD_HANDLER.
2429 Return an indication of whether there was a previous handler in effect. */
2432 push_float_handler (handler, old_handler)
2433 jmp_buf handler, old_handler;
2435 int was_handled = float_handled;
2439 memcpy ((char *) old_handler, (char *) float_handler,
2440 sizeof (float_handler));
2442 memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
2446 /* Restore the previous specification of whether and where to longjmp to
2447 when a floating arithmetic error happens. */
2450 pop_float_handler (handled, handler)
2454 float_handled = handled;
2456 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
2459 /* Handler for SIGPIPE. */
2463 /* If this is missing, some compilers complain. */
2464 int signo ATTRIBUTE_UNUSED;
2466 fatal ("output pipe has been closed");
2469 /* Strip off a legitimate source ending from the input string NAME of
2470 length LEN. Rather than having to know the names used by all of
2471 our front ends, we strip off an ending of a period followed by
2472 up to five characters. (Java uses ".class".) */
2475 strip_off_ending (name, len)
2480 for (i = 2; i < 6 && len > i; i++)
2482 if (name[len - i] == '.')
2484 name[len - i] = '\0';
2490 /* Output a quoted string. */
2493 output_quoted_string (asm_file, string)
2497 #ifdef OUTPUT_QUOTED_STRING
2498 OUTPUT_QUOTED_STRING (asm_file, string);
2502 putc ('\"', asm_file);
2503 while ((c = *string++) != 0)
2505 if (c == '\"' || c == '\\')
2506 putc ('\\', asm_file);
2509 putc ('\"', asm_file);
2513 /* Output a file name in the form wanted by System V. */
2516 output_file_directive (asm_file, input_name)
2518 const char *input_name;
2520 int len = strlen (input_name);
2521 const char *na = input_name + len;
2523 /* NA gets INPUT_NAME sans directory names. */
2524 while (na > input_name)
2528 #ifdef DIR_SEPARATOR
2529 if (na[-1] == DIR_SEPARATOR)
2535 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
2536 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
2538 #ifdef ASM_OUTPUT_SOURCE_FILENAME
2539 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
2541 fprintf (asm_file, "\t.file\t");
2542 output_quoted_string (asm_file, na);
2543 fputc ('\n', asm_file);
2548 #ifdef ASM_IDENTIFY_LANGUAGE
2549 /* Routine to build language identifier for object file. */
2551 output_lang_identify (asm_out_file)
2554 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
2555 char *s = (char *) alloca (len);
2556 sprintf (s, "__gnu_compiled_%s", lang_identify ());
2557 ASM_OUTPUT_LABEL (asm_out_file, s);
2561 /* Routine to open a dump file. */
2563 open_dump_file (suffix, function_name)
2565 const char *function_name;
2572 dumpname = concat (dump_base_name, suffix, NULL);
2574 if (rtl_dump_file != NULL)
2575 fclose (rtl_dump_file);
2577 rtl_dump_file = fopen (dumpname, "a");
2579 if (rtl_dump_file == NULL)
2580 pfatal_with_name (dumpname);
2585 fprintf (rtl_dump_file, "\n;; Function %s\n\n", function_name);
2591 /* Routine to close a dump file. */
2593 close_dump_file (func, insns)
2594 void (*func) PROTO ((FILE *, rtx));
2601 func (rtl_dump_file, insns);
2603 fflush (rtl_dump_file);
2604 fclose (rtl_dump_file);
2606 rtl_dump_file = NULL;
2612 /* Routine to dump rtl into a file. */
2614 dump_rtl (suffix, decl, func, insns)
2617 void (*func) PROTO ((FILE *, rtx));
2620 open_dump_file (suffix, decl_printable_name (decl, 2));
2621 close_dump_file (func, insns);
2624 /* Routine to empty a dump file. */
2626 clean_dump_file (suffix)
2629 char * const dumpname = concat (dump_base_name, suffix, NULL);
2631 rtl_dump_file = fopen (dumpname, "w");
2633 if (rtl_dump_file == NULL)
2634 pfatal_with_name (dumpname);
2638 fclose (rtl_dump_file);
2639 rtl_dump_file = NULL;
2644 /* Do any final processing required for the declarations in VEC, of
2645 which there are LEN. We write out inline functions and variables
2646 that have been deferred until this point, but which are required.
2647 Returns non-zero if anything was put out. */
2649 wrapup_global_declarations (vec, len)
2656 int output_something = 0;
2658 for (i = 0; i < len; i++)
2662 /* We're not deferring this any longer. */
2663 DECL_DEFER_OUTPUT (decl) = 0;
2665 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
2666 && incomplete_decl_finalize_hook != 0)
2667 (*incomplete_decl_finalize_hook) (decl);
2670 /* Now emit any global variables or functions that we have been
2671 putting off. We need to loop in case one of the things emitted
2672 here references another one which comes earlier in the list. */
2676 for (i = 0; i < len; i++)
2680 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
2683 /* Don't write out static consts, unless we still need them.
2685 We also keep static consts if not optimizing (for debugging),
2686 unless the user specified -fno-keep-static-consts.
2687 ??? They might be better written into the debug information.
2688 This is possible when using DWARF.
2690 A language processor that wants static constants to be always
2691 written out (even if it is not used) is responsible for
2692 calling rest_of_decl_compilation itself. E.g. the C front-end
2693 calls rest_of_decl_compilation from finish_decl.
2694 One motivation for this is that is conventional in some
2695 environments to write things like:
2696 static const char rcsid[] = "... version string ...";
2697 intending to force the string to be in the executable.
2699 A language processor that would prefer to have unneeded
2700 static constants "optimized away" would just defer writing
2701 them out until here. E.g. C++ does this, because static
2702 constants are often defined in header files.
2704 ??? A tempting alternative (for both C and C++) would be
2705 to force a constant to be written if and only if it is
2706 defined in a main file, as opposed to an include file. */
2708 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2709 && (! TREE_READONLY (decl)
2710 || TREE_PUBLIC (decl)
2711 || (!optimize && flag_keep_static_consts)
2712 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2715 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
2718 if (TREE_CODE (decl) == FUNCTION_DECL
2719 && DECL_INITIAL (decl) != 0
2720 && DECL_SAVED_INSNS (decl) != 0
2721 && (flag_keep_inline_functions
2722 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
2723 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
2726 temporary_allocation ();
2727 output_inline_function (decl);
2728 permanent_allocation (1);
2733 output_something = 1;
2737 return output_something;
2740 /* Issue appropriate warnings for the global declarations in VEC (of
2741 which there are LEN). Output debugging information for them. */
2743 check_global_declarations (vec, len)
2750 for (i = 0; i < len; i++)
2754 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
2755 && ! TREE_ASM_WRITTEN (decl))
2756 /* Cancel the RTL for this decl so that, if debugging info
2757 output for global variables is still to come,
2758 this one will be omitted. */
2759 DECL_RTL (decl) = NULL;
2761 /* Warn about any function
2762 declared static but not defined.
2763 We don't warn about variables,
2764 because many programs have static variables
2765 that exist only to get some text into the object file. */
2766 if (TREE_CODE (decl) == FUNCTION_DECL
2768 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2769 && DECL_INITIAL (decl) == 0
2770 && DECL_EXTERNAL (decl)
2771 && ! DECL_ARTIFICIAL (decl)
2772 && ! TREE_PUBLIC (decl))
2774 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
2775 pedwarn_with_decl (decl,
2776 "`%s' used but never defined");
2778 warning_with_decl (decl,
2779 "`%s' declared `static' but never defined");
2780 /* This symbol is effectively an "extern" declaration now. */
2781 TREE_PUBLIC (decl) = 1;
2782 assemble_external (decl);
2785 /* Warn about static fns or vars defined but not used,
2786 but not about inline functions or static consts
2787 since defining those in header files is normal practice. */
2789 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
2790 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
2791 && ! DECL_IN_SYSTEM_HEADER (decl)
2792 && ! DECL_EXTERNAL (decl)
2793 && ! TREE_PUBLIC (decl)
2794 && ! TREE_USED (decl)
2795 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
2796 /* The TREE_USED bit for file-scope decls
2797 is kept in the identifier, to handle multiple
2798 external decls in different scopes. */
2799 && ! TREE_USED (DECL_NAME (decl)))
2800 warning_with_decl (decl, "`%s' defined but not used");
2802 #ifdef SDB_DEBUGGING_INFO
2803 /* The COFF linker can move initialized global vars to the end.
2804 And that can screw up the symbol ordering.
2805 By putting the symbols in that order to begin with,
2806 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
2807 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
2808 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
2809 && ! DECL_EXTERNAL (decl)
2810 && DECL_RTL (decl) != 0)
2811 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2813 /* Output COFF information for non-global
2814 file-scope initialized variables. */
2815 if (write_symbols == SDB_DEBUG
2816 && TREE_CODE (decl) == VAR_DECL
2817 && DECL_INITIAL (decl)
2818 && ! DECL_EXTERNAL (decl)
2819 && DECL_RTL (decl) != 0
2820 && GET_CODE (DECL_RTL (decl)) == MEM)
2821 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
2822 #endif /* SDB_DEBUGGING_INFO */
2823 #ifdef DWARF_DEBUGGING_INFO
2824 /* Output DWARF information for file-scope tentative data object
2825 declarations, file-scope (extern) function declarations (which
2826 had no corresponding body) and file-scope tagged type declarations
2827 and definitions which have not yet been forced out. */
2829 if (write_symbols == DWARF_DEBUG
2830 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2831 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
2833 #ifdef DWARF2_DEBUGGING_INFO
2834 /* Output DWARF2 information for file-scope tentative data object
2835 declarations, file-scope (extern) function declarations (which
2836 had no corresponding body) and file-scope tagged type declarations
2837 and definitions which have not yet been forced out. */
2839 if (write_symbols == DWARF2_DEBUG
2840 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
2841 TIMEVAR (symout_time, dwarf2out_decl (decl));
2846 /* Compile an entire file of output from cpp, named NAME.
2847 Write a file of assembly output and various debugging dumps. */
2856 int name_specified = name != 0;
2858 if (dump_base_name == 0)
2859 dump_base_name = name ? name : "gccdump";
2863 integration_time = 0;
2869 branch_prob_time = 0;
2874 local_alloc_time = 0;
2875 global_alloc_time = 0;
2880 shorten_branch_time = 0;
2886 /* Initialize data in various passes. */
2890 name = init_parse (name);
2891 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2892 || debug_info_level == DINFO_LEVEL_VERBOSE
2893 || flag_test_coverage
2894 || warn_notreached);
2896 init_decl_processing ();
2903 init_function_once ();
2904 init_stor_layout_once ();
2905 init_varasm_once ();
2907 /* The following initialization functions need to generate rtl, so
2908 provide a dummy function context for them. */
2909 init_dummy_function_start ();
2912 if (flag_caller_saves)
2913 init_caller_save ();
2914 expand_dummy_function_end ();
2916 /* If auxiliary info generation is desired, open the output file.
2917 This goes in the same directory as the source file--unlike
2918 all the other output files. */
2919 if (flag_gen_aux_info)
2921 aux_info_file = fopen (aux_info_file_name, "w");
2922 if (aux_info_file == 0)
2923 pfatal_with_name (aux_info_file_name);
2926 /* Clear the dump files. */
2928 clean_dump_file (".00.rtl");
2931 clean_dump_file (".01.jump");
2932 if (graph_dump_format != no_graph)
2933 clean_graph_dump_file (dump_base_name, ".01.jump");
2937 clean_dump_file (".02.cse");
2938 if (graph_dump_format != no_graph)
2939 clean_graph_dump_file (dump_base_name, ".02.cse");
2943 clean_dump_file (".03.addressof");
2944 if (graph_dump_format != no_graph)
2945 clean_graph_dump_file (dump_base_name, ".03.addressof");
2949 clean_dump_file (".04.gcse");
2950 if (graph_dump_format != no_graph)
2951 clean_graph_dump_file (dump_base_name, ".04.gcse");
2955 clean_dump_file (".05.loop");
2956 if (graph_dump_format != no_graph)
2957 clean_graph_dump_file (dump_base_name, ".05.loop");
2961 clean_dump_file (".06.cse2");
2962 if (graph_dump_format != no_graph)
2963 clean_graph_dump_file (dump_base_name, ".06.cse2");
2965 if (branch_prob_dump)
2967 clean_dump_file (".07.bp");
2968 if (graph_dump_format != no_graph)
2969 clean_graph_dump_file (dump_base_name, ".07.bp");
2973 clean_dump_file (".08.flow");
2974 if (graph_dump_format != no_graph)
2975 clean_graph_dump_file (dump_base_name, ".08.flow");
2979 clean_dump_file (".09.combine");
2980 if (graph_dump_format != no_graph)
2981 clean_graph_dump_file (dump_base_name, ".09.combine");
2985 clean_dump_file (".10.regmove");
2986 if (graph_dump_format != no_graph)
2987 clean_graph_dump_file (dump_base_name, ".10.regmove");
2989 #ifdef INSN_SCHEDULING
2992 clean_dump_file (".11.sched");
2993 if (graph_dump_format != no_graph)
2994 clean_graph_dump_file (dump_base_name, ".11.sched");
2999 clean_dump_file (".12.lreg");
3000 if (graph_dump_format != no_graph)
3001 clean_graph_dump_file (dump_base_name, ".12.lreg");
3003 if (global_reg_dump)
3005 clean_dump_file (".13.greg");
3006 if (graph_dump_format != no_graph)
3007 clean_graph_dump_file (dump_base_name, ".13.greg");
3011 clean_dump_file (".14.flow2");
3012 if (graph_dump_format != no_graph)
3013 clean_graph_dump_file (dump_base_name, ".14.flow2");
3015 #ifdef HAVE_peephole2
3018 clean_dump_file (".15.peephole2");
3019 if (graph_dump_format != no_graph)
3020 clean_graph_dump_file (dump_base_name, ".15.peephole2");
3023 #ifdef INSN_SCHEDULING
3026 clean_dump_file (".16.sched2");
3027 if (graph_dump_format != no_graph)
3028 clean_graph_dump_file (dump_base_name, ".16.sched2");
3033 clean_dump_file (".17.jump2");
3034 if (graph_dump_format != no_graph)
3035 clean_graph_dump_file (dump_base_name, ".17.jump2");
3037 #ifdef MACHINE_DEPENDENT_REORG
3038 if (mach_dep_reorg_dump)
3040 clean_dump_file (".18.mach");
3041 if (graph_dump_format != no_graph)
3042 clean_graph_dump_file (dump_base_name, ".18.mach");
3048 clean_dump_file (".19.dbr");
3049 if (graph_dump_format != no_graph)
3050 clean_graph_dump_file (dump_base_name, ".19.dbr");
3056 clean_dump_file (".20.stack");
3057 if (graph_dump_format != no_graph)
3058 clean_graph_dump_file (dump_base_name, ".20.stack");
3062 /* Open assembler code output file. */
3064 if (flag_syntax_only)
3065 asm_out_file = NULL;
3068 if (! name_specified && asm_file_name == 0)
3069 asm_out_file = stdout;
3072 if (asm_file_name == 0)
3074 int len = strlen (dump_base_name);
3075 char *dumpname = (char *) xmalloc (len + 6);
3076 memcpy (dumpname, dump_base_name, len + 1);
3077 strip_off_ending (dumpname, len);
3078 strcat (dumpname, ".s");
3079 asm_file_name = dumpname;
3081 if (!strcmp (asm_file_name, "-"))
3082 asm_out_file = stdout;
3084 asm_out_file = fopen (asm_file_name, "w");
3085 if (asm_out_file == 0)
3086 pfatal_with_name (asm_file_name);
3089 #ifdef IO_BUFFER_SIZE
3090 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
3091 _IOFBF, IO_BUFFER_SIZE);
3096 name = ggc_alloc_string (name, strlen (name));
3097 input_filename = name;
3099 /* Put an entry on the input file stack for the main input file. */
3101 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
3102 input_file_stack->next = 0;
3103 input_file_stack->name = input_filename;
3105 /* Perform language-specific initialization.
3106 This may set main_input_filename. */
3109 /* If the input doesn't start with a #line, use the input name
3110 as the official input file name. */
3111 if (main_input_filename == 0)
3112 main_input_filename = name;
3114 if (flag_syntax_only)
3116 write_symbols = NO_DEBUG;
3118 profile_block_flag = 0;
3122 ASM_FILE_START (asm_out_file);
3124 #ifdef ASM_COMMENT_START
3125 if (flag_verbose_asm)
3127 /* Print the list of options in effect. */
3128 print_version (asm_out_file, ASM_COMMENT_START);
3129 print_switch_values (asm_out_file, 0, MAX_LINE,
3130 ASM_COMMENT_START, " ", "\n");
3131 /* Add a blank line here so it appears in assembler output but not
3133 fprintf (asm_out_file, "\n");
3137 /* Output something to inform GDB that this compilation was by GCC. */
3138 #ifndef ASM_IDENTIFY_GCC
3139 fprintf (asm_out_file, "gcc2_compiled.:\n");
3141 ASM_IDENTIFY_GCC (asm_out_file);
3144 /* Output something to identify which front-end produced this file. */
3145 #ifdef ASM_IDENTIFY_LANGUAGE
3146 ASM_IDENTIFY_LANGUAGE (asm_out_file);
3148 } /* ! flag_syntax_only */
3150 #ifndef ASM_OUTPUT_SECTION_NAME
3151 if (flag_function_sections)
3153 warning ("-ffunction-sections not supported for this target.");
3154 flag_function_sections = 0;
3156 if (flag_data_sections)
3158 warning ("-fdata-sections not supported for this target.");
3159 flag_data_sections = 0;
3163 if (flag_function_sections
3164 && (profile_flag || profile_block_flag))
3166 warning ("-ffunction-sections disabled; it makes profiling impossible.");
3167 flag_function_sections = 0;
3170 #ifndef OBJECT_FORMAT_ELF
3171 if (flag_function_sections && write_symbols != NO_DEBUG)
3172 warning ("-ffunction-sections may affect debugging on some targets.");
3175 /* ??? Note: There used to be a conditional here
3176 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
3177 This was to guarantee separation between gcc_compiled. and
3178 the first function, for the sake of dbx on Suns.
3179 However, having the extra zero here confused the Emacs
3180 code for unexec, and might confuse other programs too.
3181 Therefore, I took out that change.
3182 In future versions we should find another way to solve
3183 that dbx problem. -- rms, 23 May 93. */
3185 /* Don't let the first function fall at the same address
3186 as gcc_compiled., if profiling. */
3187 if (profile_flag || profile_block_flag)
3189 /* It's best if we can write a nop here since some
3190 assemblers don't tolerate zeros in the text section. */
3191 output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
3194 /* If dbx symbol table desired, initialize writing it
3195 and output the predefined types. */
3196 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3197 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
3198 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
3201 #ifdef SDB_DEBUGGING_INFO
3202 if (write_symbols == SDB_DEBUG)
3203 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
3206 #ifdef DWARF_DEBUGGING_INFO
3207 if (write_symbols == DWARF_DEBUG)
3208 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
3210 #ifdef DWARF2_UNWIND_INFO
3211 if (dwarf2out_do_frame ())
3212 dwarf2out_frame_init ();
3214 #ifdef DWARF2_DEBUGGING_INFO
3215 if (write_symbols == DWARF2_DEBUG)
3216 TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
3219 /* Initialize yet another pass. */
3221 init_final (main_input_filename);
3222 init_branch_prob (dump_base_name);
3224 start_time = get_run_time ();
3226 /* Call the parser, which parses the entire file
3227 (calling rest_of_compilation for each function). */
3229 if (yyparse () != 0)
3231 if (errorcount == 0)
3232 notice ("Errors detected in input file (your bison.simple is out of date)\n");
3234 /* In case there were missing closebraces,
3235 get us back to the global binding level. */
3236 while (! global_bindings_p ())
3240 /* Compilation is now finished except for writing
3241 what's left of the symbol table output. */
3243 parse_time += get_run_time () - start_time;
3245 parse_time -= integration_time;
3246 parse_time -= varconst_time;
3248 if (flag_syntax_only)
3251 globals = getdecls ();
3253 /* Really define vars that have had only a tentative definition.
3254 Really output inline functions that must actually be callable
3255 and have not been output so far. */
3258 int len = list_length (globals);
3259 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
3263 /* Process the decls in reverse order--earliest first.
3264 Put them into VEC from back to front, then take out from front. */
3266 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
3267 vec[len - i - 1] = decl;
3269 wrapup_global_declarations (vec, len);
3271 /* This must occur after the loop to output deferred functions. Else
3272 the profiler initializer would not be emitted if all the functions
3273 in this compilation unit were deferred.
3275 output_func_start_profiler can not cause any additional functions or
3276 data to need to be output, so it need not be in the deferred function
3278 output_func_start_profiler ();
3280 /* Now that all possible functions have been output, we can dump
3281 the exception table. */
3283 output_exception_table ();
3285 check_global_declarations (vec, len);
3291 /* Write out any pending weak symbol declarations. */
3295 /* Do dbx symbols */
3296 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3297 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
3298 TIMEVAR (symout_time,
3300 dbxout_finish (asm_out_file, main_input_filename);
3304 #ifdef DWARF_DEBUGGING_INFO
3305 if (write_symbols == DWARF_DEBUG)
3306 TIMEVAR (symout_time,
3312 #ifdef DWARF2_UNWIND_INFO
3313 if (dwarf2out_do_frame ())
3314 dwarf2out_frame_finish ();
3317 #ifdef DWARF2_DEBUGGING_INFO
3318 if (write_symbols == DWARF2_DEBUG)
3319 TIMEVAR (symout_time,
3321 dwarf2out_finish ();
3325 /* Output some stuff at end of file if nec. */
3327 end_final (dump_base_name);
3329 if (branch_prob_dump)
3330 open_dump_file (".07.bp", NULL);
3332 TIMEVAR (dump_time, end_branch_prob (rtl_dump_file));
3334 if (branch_prob_dump)
3335 close_dump_file (NULL, NULL_RTX);
3338 ASM_FILE_END (asm_out_file);
3342 /* Language-specific end of compilation actions. */
3346 /* Close the dump files. */
3348 if (flag_gen_aux_info)
3350 fclose (aux_info_file);
3352 unlink (aux_info_file_name);
3357 open_dump_file (".09.combine", NULL);
3358 TIMEVAR (dump_time, dump_combine_total_stats (rtl_dump_file));
3359 close_dump_file (NULL, NULL_RTX);
3362 /* Close non-debugging input and output files. Take special care to note
3363 whether fclose returns an error, since the pages might still be on the
3364 buffer chain while the file is open. */
3368 if (! flag_syntax_only
3369 && (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0))
3370 fatal_io_error (asm_file_name);
3372 /* Do whatever is necessary to finish printing the graphs. */
3373 if (graph_dump_format != no_graph)
3376 finish_graph_dump_file (dump_base_name, ".01.jump");
3378 finish_graph_dump_file (dump_base_name, ".02.cse");
3380 finish_graph_dump_file (dump_base_name, ".03.addressof");
3382 finish_graph_dump_file (dump_base_name, ".04.gcse");
3384 finish_graph_dump_file (dump_base_name, ".05.loop");
3386 finish_graph_dump_file (dump_base_name, ".06.cse2");
3387 if (branch_prob_dump)
3388 finish_graph_dump_file (dump_base_name, ".07.bp");
3390 finish_graph_dump_file (dump_base_name, ".08.flow");
3392 finish_graph_dump_file (dump_base_name, ".09.combine");
3394 finish_graph_dump_file (dump_base_name, ".10.regmove");
3395 #ifdef INSN_SCHEDULING
3397 finish_graph_dump_file (dump_base_name, ".11.sched");
3400 finish_graph_dump_file (dump_base_name, ".12.lreg");
3401 if (global_reg_dump)
3402 finish_graph_dump_file (dump_base_name, ".13.greg");
3404 finish_graph_dump_file (dump_base_name, ".14.flow2");
3405 #ifdef HAVE_peephole2
3407 finish_graph_dump_file (dump_base_name, ".15.peephole2");
3409 #ifdef INSN_SCHEDULING
3411 finish_graph_dump_file (dump_base_name, ".16.sched2");
3414 finish_graph_dump_file (dump_base_name, ".17.jump2");
3415 #ifdef MACHINE_DEPENDENT_REORG
3416 if (mach_dep_reorg_dump)
3417 finish_graph_dump_file (dump_base_name, ".18.mach");
3421 finish_graph_dump_file (dump_base_name, ".19.dbr");
3425 finish_graph_dump_file (dump_base_name, ".20.stack");
3429 /* Free up memory for the benefit of leak detectors. */
3432 /* Print the times. */
3436 all_time = get_run_time ();
3438 fprintf (stderr,"\n");
3440 print_time ("parse", parse_time);
3441 print_time ("integration", integration_time);
3442 print_time ("jump", jump_time);
3443 print_time ("cse", cse_time);
3444 print_time ("gcse", gcse_time);
3445 print_time ("loop", loop_time);
3446 print_time ("cse2", cse2_time);
3447 print_time ("branch-prob", branch_prob_time);
3448 print_time ("flow", flow_time);
3449 print_time ("combine", combine_time);
3450 print_time ("regmove", regmove_time);
3451 #ifdef INSN_SCHEDULING
3452 print_time ("sched", sched_time);
3454 print_time ("local-alloc", local_alloc_time);
3455 print_time ("global-alloc", global_alloc_time);
3456 print_time ("flow2", flow2_time);
3457 #ifdef HAVE_peephole2
3458 print_time ("peephole2", peephole2_time);
3460 #ifdef INSN_SCHEDULING
3461 print_time ("sched2", sched2_time);
3464 print_time ("dbranch", dbr_sched_time);
3466 print_time ("shorten-branch", shorten_branch_time);
3468 print_time ("stack-reg", stack_reg_time);
3470 print_time ("final", final_time);
3471 print_time ("varconst", varconst_time);
3472 print_time ("symout", symout_time);
3473 print_time ("dump", dump_time);
3475 print_time ("gc", gc_time);
3479 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
3480 and TYPE_DECL nodes.
3482 This does nothing for local (non-static) variables, unless the
3483 variable is a register variable with an ASMSPEC. In that case, or
3484 if the variable is not an automatice, it sets up the RTL and
3485 outputs any assembler code (label definition, storage allocation
3486 and initialization).
3488 DECL is the declaration. If ASMSPEC is nonzero, it specifies
3489 the assembler symbol name to be used. TOP_LEVEL is nonzero
3490 if this declaration is not within a function. */
3493 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
3495 const char *asmspec;
3499 /* Declarations of variables, and of functions defined elsewhere. */
3501 /* The most obvious approach, to put an #ifndef around where
3502 this macro is used, doesn't work since it's inside a macro call. */
3503 #ifndef ASM_FINISH_DECLARE_OBJECT
3504 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
3507 /* Forward declarations for nested functions are not "external",
3508 but we need to treat them as if they were. */
3509 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
3510 || TREE_CODE (decl) == FUNCTION_DECL)
3511 TIMEVAR (varconst_time,
3513 make_decl_rtl (decl, asmspec, top_level);
3514 /* Initialized extern variable exists to be replaced
3515 with its value, or represents something that will be
3516 output in another file. */
3517 if (! (TREE_CODE (decl) == VAR_DECL
3518 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
3519 && DECL_INITIAL (decl) != 0
3520 && DECL_INITIAL (decl) != error_mark_node))
3521 /* Don't output anything
3522 when a tentative file-scope definition is seen.
3523 But at end of compilation, do output code for them. */
3524 if (! (! at_end && top_level
3525 && (DECL_INITIAL (decl) == 0
3526 || DECL_INITIAL (decl) == error_mark_node)))
3527 assemble_variable (decl, top_level, at_end, 0);
3528 if (decl == last_assemble_variable_decl)
3530 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
3534 else if (DECL_REGISTER (decl) && asmspec != 0)
3536 if (decode_reg_name (asmspec) >= 0)
3538 DECL_RTL (decl) = 0;
3539 make_decl_rtl (decl, asmspec, top_level);
3542 error ("invalid register name `%s' for register variable", asmspec);
3544 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3545 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
3546 && TREE_CODE (decl) == TYPE_DECL)
3547 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
3549 #ifdef SDB_DEBUGGING_INFO
3550 else if (write_symbols == SDB_DEBUG && top_level
3551 && TREE_CODE (decl) == TYPE_DECL)
3552 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
3556 /* Called after finishing a record, union or enumeral type. */
3559 rest_of_type_compilation (type, toplev)
3560 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
3564 tree type ATTRIBUTE_UNUSED;
3565 int toplev ATTRIBUTE_UNUSED;
3568 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
3569 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
3570 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
3572 #ifdef SDB_DEBUGGING_INFO
3573 if (write_symbols == SDB_DEBUG)
3574 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
3578 /* This is called from finish_function (within yyparse)
3579 after each top-level definition is parsed.
3580 It is supposed to compile that function or variable
3581 and output the assembler code for it.
3582 After we return, the tree storage is freed. */
3585 rest_of_compilation (decl)
3589 int start_time = get_run_time ();
3592 int rebuild_label_notes_after_reload;
3594 /* First, remove any notes we don't need. That will make iterating
3595 over the instruction sequence faster, and allow the garbage
3596 collector to reclaim the memory used by the notes. */
3597 remove_unncessary_notes ();
3599 /* If we are reconsidering an inline function
3600 at the end of compilation, skip the stuff for making it inline. */
3602 if (DECL_SAVED_INSNS (decl) == 0)
3608 /* If this is nested inside an inlined external function, pretend
3609 it was only declared. Since we cannot inline such functions,
3610 generating code for this one is not only not necessary but will
3611 confuse some debugging output writers. */
3612 for (parent = DECL_CONTEXT (current_function_decl);
3613 parent != NULL_TREE;
3614 parent = get_containing_scope (parent))
3615 if (TREE_CODE (parent) == FUNCTION_DECL
3616 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
3618 DECL_INITIAL (decl) = 0;
3619 goto exit_rest_of_compilation;
3622 /* If requested, consider whether to make this function inline. */
3623 if (DECL_INLINE (decl) || flag_inline_functions)
3624 TIMEVAR (integration_time,
3626 lose = function_cannot_inline_p (decl);
3627 if (lose || ! optimize)
3629 if (warn_inline && DECL_INLINE (decl))
3630 warning_with_decl (decl, lose);
3631 DECL_ABSTRACT_ORIGIN (decl) = 0;
3632 /* Don't really compile an extern inline function.
3633 If we can't make it inline, pretend
3634 it was only declared. */
3635 if (DECL_EXTERNAL (decl))
3637 DECL_INITIAL (decl) = 0;
3638 goto exit_rest_of_compilation;
3642 /* ??? Note that this has the effect of making it look
3643 like "inline" was specified for a function if we choose
3644 to inline it. This isn't quite right, but it's
3645 probably not worth the trouble to fix. */
3646 inlinable = DECL_INLINE (decl) = 1;
3649 insns = get_insns ();
3651 /* Dump the rtl code if we are dumping rtl. */
3655 open_dump_file (".00.rtl", decl_printable_name (decl, 2));
3657 if (DECL_SAVED_INSNS (decl))
3658 fprintf (rtl_dump_file, ";; (integrable)\n\n");
3660 close_dump_file (print_rtl, insns);
3663 /* If function is inline, and we don't yet know whether to
3664 compile it by itself, defer decision till end of compilation.
3665 finish_compilation will call rest_of_compilation again
3666 for those functions that need to be output. Also defer those
3667 functions that we are supposed to defer. */
3670 DECL_DEFER_OUTPUT (decl) = 1;
3672 if (DECL_DEFER_OUTPUT (decl)
3673 || (DECL_INLINE (decl)
3674 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
3675 && ! flag_keep_inline_functions)
3676 || DECL_EXTERNAL (decl))))
3678 DECL_DEFER_OUTPUT (decl) = 1;
3680 /* If -Wreturn-type, we have to do a bit of compilation.
3681 However, if we just fall through we will call
3682 save_for_inline_copying() which results in excessive
3683 memory use. Instead, we just want to call
3684 jump_optimize() to figure out whether or not we can fall
3685 off the end of the function; we do the minimum amount of
3686 work necessary to make that safe. And, we set optimize
3687 to zero to keep jump_optimize from working too hard. */
3688 if (warn_return_type)
3690 int saved_optimize = optimize;
3692 find_exception_handler_labels ();
3693 jump_optimize (get_insns(), !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
3694 !JUMP_AFTER_REGSCAN);
3695 optimize = saved_optimize;
3698 #ifdef DWARF_DEBUGGING_INFO
3699 /* Generate the DWARF info for the "abstract" instance
3700 of a function which we may later generate inlined and/or
3701 out-of-line instances of. */
3702 if (write_symbols == DWARF_DEBUG)
3704 set_decl_abstract_flags (decl, 1);
3705 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3706 set_decl_abstract_flags (decl, 0);
3709 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
3710 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
3711 goto exit_rest_of_compilation;
3714 /* If specified extern inline but we aren't inlining it, we are
3715 done. This goes for anything that gets here with DECL_EXTERNAL
3716 set, not just things with DECL_INLINE. */
3717 if (DECL_EXTERNAL (decl))
3718 goto exit_rest_of_compilation;
3721 /* Initialize some variables used by the optimizers. */
3722 init_function_for_compilation ();
3724 if (! DECL_DEFER_OUTPUT (decl))
3725 TREE_ASM_WRITTEN (decl) = 1;
3727 /* Now that integrate will no longer see our rtl, we need not distinguish
3728 between the return value of this function and the return value of called
3730 rtx_equal_function_value_matters = 0;
3732 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
3733 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
3735 goto exit_rest_of_compilation;
3738 /* Emit code to get eh context, if needed. */
3742 /* If we are doing position-independent code generation, now
3743 is the time to output special prologues and epilogues.
3744 We do not want to do this earlier, because it just clutters
3745 up inline functions with meaningless insns. */
3750 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
3751 Note that that may have been done above, in save_for_inline_copying.
3752 The call to resume_temporary_allocation near the end of this function
3753 goes back to the usual state of affairs. This must be done after
3754 we've built up any unwinders for exception handling, and done
3755 the FINALIZE_PIC work, if necessary. */
3757 rtl_in_current_obstack ();
3759 insns = get_insns ();
3761 /* Copy any shared structure that should not be shared. */
3763 unshare_all_rtl (insns);
3765 init_EXPR_INSN_LIST_cache ();
3767 #ifdef SETJMP_VIA_SAVE_AREA
3768 /* This must be performed before virutal register instantiation. */
3769 if (current_function_calls_alloca)
3770 optimize_save_area_alloca (insns);
3773 /* Instantiate all virtual registers. */
3775 instantiate_virtual_regs (current_function_decl, get_insns ());
3777 /* See if we have allocated stack slots that are not directly addressable.
3778 If so, scan all the insns and create explicit address computation
3779 for all references to such slots. */
3780 /* fixup_stack_slots (); */
3782 /* Find all the EH handlers. */
3783 find_exception_handler_labels ();
3786 open_dump_file (".01.jump", decl_printable_name (decl, 2));
3788 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
3789 are initialized and to compute whether control can drop off the end
3791 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3792 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
3793 JUMP_AFTER_REGSCAN));
3795 /* Jump optimization, and the removal of NULL pointer checks, may
3796 have reduced the number of instructions substantially. CSE, and
3797 future passes, allocate arrays whose dimensions involve the maximum
3798 instruction UID, so if we can reduce the maximum UID we'll save big on
3800 renumber_insns (rtl_dump_file);
3802 /* Dump rtl code after jump, if we are doing that. */
3804 close_dump_file (print_rtl, insns);
3806 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
3807 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
3808 goto exit_rest_of_compilation;
3810 /* Try to identify useless null pointer tests and delete them. */
3811 if (flag_delete_null_pointer_checks)
3812 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3817 /* Perform common subexpression elimination.
3818 Nonzero value from `cse_main' means that jumps were simplified
3819 and some code may now be unreachable, so do
3820 jump optimization again. */
3825 open_dump_file (".02.cse", decl_printable_name (decl, 2));
3827 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
3829 if (flag_thread_jumps)
3830 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
3832 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
3834 /* If we are not running the second CSE pass, then we are no longer
3835 expecting CSE to be run. */
3836 cse_not_expected = !flag_rerun_cse_after_loop;
3838 if (tem || optimize > 1)
3839 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3841 !JUMP_AFTER_REGSCAN));
3843 /* Run this after jump optmizations remove all the unreachable code
3844 so that unreachable code will not keep values live. */
3845 TIMEVAR (cse_time, delete_trivially_dead_insns (insns, max_reg_num ()));
3847 /* Try to identify useless null pointer tests and delete them. */
3848 if (flag_delete_null_pointer_checks)
3849 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3851 /* The second pass of jump optimization is likely to have
3852 removed a bunch more instructions. */
3853 renumber_insns (rtl_dump_file);
3855 /* Dump rtl code after cse, if we are doing that. */
3858 close_dump_file (print_rtl, insns);
3859 if (graph_dump_format != no_graph)
3860 print_rtl_graph_with_bb (dump_base_name, ".02.cse", insns);
3864 purge_addressof (insns);
3865 reg_scan (insns, max_reg_num (), 1);
3869 dump_rtl (".03.addressof", decl, print_rtl, insns);
3870 if (graph_dump_format != no_graph)
3871 print_rtl_graph_with_bb (dump_base_name, ".03.addressof", insns);
3877 /* Perform global cse. */
3879 if (optimize > 0 && flag_gcse)
3882 open_dump_file (".04.gcse", decl_printable_name (decl, 2));
3884 TIMEVAR (gcse_time, tem = gcse_main (insns, rtl_dump_file));
3886 /* If gcse altered any jumps, rerun jump optimizations to clean
3890 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3892 !JUMP_AFTER_REGSCAN));
3897 close_dump_file (print_rtl, insns);
3898 if (graph_dump_format != no_graph)
3899 print_rtl_graph_with_bb (dump_base_name, ".04.gcse", insns);
3905 /* Move constant computations out of loops. */
3910 open_dump_file (".05.loop", decl_printable_name (decl, 2));
3915 if (flag_rerun_loop_opt)
3917 /* We only want to perform unrolling once. */
3919 loop_optimize (insns, rtl_dump_file, 0, 0);
3922 /* The first call to loop_optimize makes some instructions
3923 trivially dead. We delete those instructions now in the
3924 hope that doing so will make the heuristics in loop work
3925 better and possibly speed up compilation. */
3926 delete_trivially_dead_insns (insns, max_reg_num ());
3928 /* The regscan pass is currently necessary as the alias
3929 analysis code depends on this information. */
3930 reg_scan (insns, max_reg_num (), 1);
3932 loop_optimize (insns, rtl_dump_file, flag_unroll_loops, 1);
3935 /* Dump rtl code after loop opt, if we are doing that. */
3939 close_dump_file (print_rtl, insns);
3940 if (graph_dump_format != no_graph)
3941 print_rtl_graph_with_bb (dump_base_name, ".05.loop", insns);
3948 /* ??? Well, nearly. If HAVE_conditional_arithmetic, jump_optimize
3949 has put off all if-conversion until "after CSE". If we put this
3950 off any longer we may miss out doing if-conversion entirely. */
3951 cse_not_expected = 1;
3956 open_dump_file (".06.cse2", decl_printable_name (decl, 2));
3958 if (flag_rerun_cse_after_loop)
3960 /* Running another jump optimization pass before the second
3961 cse pass sometimes simplifies the RTL enough to allow
3962 the second CSE pass to do a better job. Jump_optimize can change
3963 max_reg_num so we must rerun reg_scan afterwards.
3964 ??? Rework to not call reg_scan so often. */
3965 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3966 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3968 JUMP_AFTER_REGSCAN));
3970 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3971 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3974 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3976 !JUMP_AFTER_REGSCAN));
3979 if (flag_thread_jumps)
3981 /* This pass of jump threading straightens out code
3982 that was kinked by loop optimization. */
3983 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3984 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3987 /* Dump rtl code after cse, if we are doing that. */
3990 close_dump_file (print_rtl, insns);
3991 if (graph_dump_format != no_graph)
3992 print_rtl_graph_with_bb (dump_base_name, ".06.cse2", insns);
3999 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
4001 if (branch_prob_dump)
4002 open_dump_file (".07.bp", decl_printable_name (decl, 2));
4007 branch_prob (insns, rtl_dump_file);
4010 if (branch_prob_dump)
4012 close_dump_file (print_rtl, insns);
4013 if (graph_dump_format != no_graph)
4014 print_rtl_graph_with_bb (dump_base_name, ".07.bp", insns);
4021 /* Now we choose between stupid (pcc-like) register allocation
4022 (if we got the -noreg switch and not -opt)
4023 and smart register allocation. */
4025 if (optimize > 0) /* Stupid allocation probably won't work */
4026 obey_regdecls = 0; /* if optimizations being done. */
4030 /* Print function header into flow dump now
4031 because doing the flow analysis makes some of the dump. */
4034 open_dump_file (".08.flow", decl_printable_name (decl, 2));
4040 regclass (insns, max_reg_num (), NULL);
4041 stupid_life_analysis (insns, max_reg_num (),
4047 /* Do control and data flow analysis,
4048 and write some of the results to dump file. */
4053 find_basic_blocks (insns, max_reg_num (), rtl_dump_file, 1);
4054 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
4057 if (warn_uninitialized || extra_warnings)
4059 uninitialized_vars_warning (DECL_INITIAL (decl));
4061 setjmp_args_warning ();
4065 /* Dump rtl after flow analysis. */
4069 close_dump_file (print_rtl_with_bb, insns);
4070 if (graph_dump_format != no_graph)
4071 print_rtl_graph_with_bb (dump_base_name, ".08.flow", insns);
4077 /* The first life analysis pass has finished. From now on we can not
4078 generate any new pseudos. */
4081 /* If -opt, try combining insns through substitution. */
4085 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
4087 /* Dump rtl code after insn combination. */
4091 dump_rtl (".09.combine", decl, print_rtl_with_bb, insns);
4092 if (graph_dump_format != no_graph)
4093 print_rtl_graph_with_bb (dump_base_name, ".09.combine", insns);
4100 /* Register allocation pre-pass, to reduce number of moves
4101 necessary for two-address machines. */
4102 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
4105 open_dump_file (".10.regmove", decl_printable_name (decl, 2));
4107 TIMEVAR (regmove_time, regmove_optimize (insns, max_reg_num (),
4112 close_dump_file (print_rtl_with_bb, insns);
4113 if (graph_dump_format != no_graph)
4114 print_rtl_graph_with_bb (dump_base_name, ".10.regmove", insns);
4121 /* Print function header into sched dump now
4122 because doing the sched analysis makes some of the dump. */
4124 #ifdef INSN_SCHEDULING
4125 if (optimize > 0 && flag_schedule_insns)
4128 open_dump_file (".11.sched", decl_printable_name (decl, 2));
4130 /* Do control and data sched analysis,
4131 and write some of the results to dump file. */
4133 TIMEVAR (sched_time, schedule_insns (rtl_dump_file));
4135 /* Dump rtl after instruction scheduling. */
4139 close_dump_file (print_rtl_with_bb, insns);
4140 if (graph_dump_format != no_graph)
4141 print_rtl_graph_with_bb (dump_base_name, ".11.sched", insns);
4149 /* Determine if the current function is a leaf before running reload
4150 since this can impact optimizations done by the prologue and
4151 epilogue thus changing register elimination offsets. */
4152 current_function_is_leaf = leaf_function_p ();
4155 open_dump_file (".12.lreg", decl_printable_name (decl, 2));
4157 /* Unless we did stupid register allocation,
4158 allocate pseudo-regs that are used only within 1 basic block.
4160 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
4161 jump optimizer after register allocation and reloading are finished. */
4164 TIMEVAR (local_alloc_time,
4166 /* We recomputed reg usage as part of updating the rest
4167 of life info during sched. */
4168 if (! flag_schedule_insns)
4169 recompute_reg_usage (insns, ! optimize_size);
4170 regclass (insns, max_reg_num (), rtl_dump_file);
4171 rebuild_label_notes_after_reload = local_alloc ();
4174 rebuild_label_notes_after_reload = 0;
4176 /* Dump rtl code after allocating regs within basic blocks. */
4180 TIMEVAR (dump_time, dump_flow_info (rtl_dump_file));
4181 TIMEVAR (dump_time, dump_local_alloc (rtl_dump_file));
4183 close_dump_file (print_rtl_with_bb, insns);
4184 if (graph_dump_format != no_graph)
4185 print_rtl_graph_with_bb (dump_base_name, ".12.lreg", insns);
4191 if (global_reg_dump)
4192 open_dump_file (".13.greg", decl_printable_name (decl, 2));
4194 /* Unless we did stupid register allocation,
4195 allocate remaining pseudo-regs, then do the reload pass
4196 fixing up any insns that are invalid. */
4198 TIMEVAR (global_alloc_time,
4201 failure = global_alloc (rtl_dump_file);
4203 failure = reload (insns, 0, rtl_dump_file);
4208 goto exit_rest_of_compilation;
4213 /* Do a very simple CSE pass over just the hard registers. */
4215 reload_cse_regs (insns);
4217 /* Register allocation and reloading may have turned an indirect jump into
4218 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
4219 jumping instructions. */
4220 if (rebuild_label_notes_after_reload)
4221 TIMEVAR (jump_time, rebuild_jump_labels (insns));
4223 /* On some machines, the prologue and epilogue code, or parts thereof,
4224 can be represented as RTL. Doing so lets us schedule insns between
4225 it and the rest of the code and also allows delayed branch
4226 scheduling to operate in the epilogue. */
4228 thread_prologue_and_epilogue_insns (insns);
4230 /* If optimizing and we are performing instruction scheduling after
4231 reload, then go ahead and split insns now since we are about to
4232 recompute flow information anyway.
4234 reload_cse_regs may expose more splitting opportunities, expecially
4235 for double-word operations. */
4236 if (optimize > 0 && flag_schedule_insns_after_reload)
4237 split_all_insns (0);
4239 if (global_reg_dump)
4241 TIMEVAR (dump_time, dump_global_regs (rtl_dump_file));
4242 close_dump_file (print_rtl_with_bb, insns);
4243 if (graph_dump_format != no_graph)
4244 print_rtl_graph_with_bb (dump_base_name, ".13.greg", insns);
4247 /* Re-create the death notes which were deleted during reload. */
4249 open_dump_file (".14.flow2", decl_printable_name (decl, 2));
4256 find_basic_blocks (insns, max_reg_num (), rtl_dump_file, 1);
4257 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
4264 flow2_completed = 1;
4268 close_dump_file (print_rtl_with_bb, insns);
4269 if (graph_dump_format != no_graph)
4270 print_rtl_graph_with_bb (dump_base_name, ".14.flow2", insns);
4273 #ifdef HAVE_peephole2
4274 if (optimize > 0 && flag_peephole2)
4277 open_dump_file (".15.peephole2", decl_printable_name (decl, 2));
4279 TIMEVAR (peephole2_time, peephole2_optimize (rtl_dump_file));
4283 close_dump_file (print_rtl_with_bb, insns);
4284 if (graph_dump_format != no_graph)
4285 print_rtl_graph_with_bb (dump_base_name, ".15.peephole2", insns);
4290 #ifdef INSN_SCHEDULING
4291 if (optimize > 0 && flag_schedule_insns_after_reload)
4294 open_dump_file (".16.sched2", decl_printable_name (decl, 2));
4296 /* Do control and data sched analysis again,
4297 and write some more of the results to dump file. */
4299 TIMEVAR (sched2_time, schedule_insns (rtl_dump_file));
4301 /* Dump rtl after post-reorder instruction scheduling. */
4305 close_dump_file (print_rtl_with_bb, insns);
4306 if (graph_dump_format != no_graph)
4307 print_rtl_graph_with_bb (dump_base_name, ".16.sched2", insns);
4315 #ifdef LEAF_REGISTERS
4316 current_function_uses_only_leaf_regs
4317 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
4320 /* One more attempt to remove jumps to .+1
4321 left by dead-store-elimination.
4322 Also do cross-jumping this time
4323 and delete no-op move insns. */
4327 TIMEVAR (jump_time, jump_optimize (insns, JUMP_CROSS_JUMP,
4329 !JUMP_AFTER_REGSCAN));
4331 /* Dump rtl code after jump, if we are doing that. */
4335 dump_rtl (".17.jump2", decl, print_rtl_with_bb, insns);
4336 if (graph_dump_format != no_graph)
4337 print_rtl_graph_with_bb (dump_base_name, ".17.jump2", insns);
4341 /* If a machine dependent reorganization is needed, call it. */
4342 #ifdef MACHINE_DEPENDENT_REORG
4343 if (mach_dep_reorg_dump)
4344 open_dump_file (".18.mach", decl_printable_name (decl, 2));
4346 MACHINE_DEPENDENT_REORG (insns);
4348 if (mach_dep_reorg_dump)
4350 close_dump_file (print_rtl_with_bb, insns);
4351 if (graph_dump_format != no_graph)
4352 print_rtl_graph_with_bb (dump_base_name, ".18.mach", insns);
4359 /* If a scheduling pass for delayed branches is to be done,
4360 call the scheduling code. */
4363 if (optimize > 0 && flag_delayed_branch)
4366 open_dump_file (".19.dbr", decl_printable_name (decl, 2));
4371 dbr_schedule (insns, rtl_dump_file);
4376 close_dump_file (print_rtl_with_bb, insns);
4377 if (graph_dump_format != no_graph)
4378 print_rtl_graph_with_bb (dump_base_name, ".19.dbr", insns);
4386 /* Shorten branches. */
4387 TIMEVAR (shorten_branch_time,
4389 shorten_branches (get_insns ());
4394 open_dump_file (".20.stack", decl_printable_name (decl, 2));
4396 TIMEVAR (stack_reg_time, reg_to_stack (insns, rtl_dump_file));
4400 close_dump_file (print_rtl_with_bb, insns);
4401 if (graph_dump_format != no_graph)
4402 print_rtl_graph_with_bb (dump_base_name, ".20.stack", insns);
4409 /* Now turn the rtl into assembler code. */
4411 TIMEVAR (final_time,
4416 /* Get the function's name, as described by its RTL.
4417 This may be different from the DECL_NAME name used
4418 in the source file. */
4420 x = DECL_RTL (decl);
4421 if (GET_CODE (x) != MEM)
4424 if (GET_CODE (x) != SYMBOL_REF)
4426 fnname = XSTR (x, 0);
4428 assemble_start_function (decl, fnname);
4429 final_start_function (insns, asm_out_file, optimize);
4430 final (insns, asm_out_file, optimize, 0);
4431 final_end_function (insns, asm_out_file, optimize);
4432 assemble_end_function (decl, fnname);
4434 fflush (asm_out_file);
4436 /* Release all memory allocated by flow. */
4437 free_basic_block_vars (0);
4439 /* Release all memory held by regsets now */
4440 regset_release_memory ();
4446 /* Write DBX symbols if requested */
4448 /* Note that for those inline functions where we don't initially
4449 know for certain that we will be generating an out-of-line copy,
4450 the first invocation of this routine (rest_of_compilation) will
4451 skip over this code by doing a `goto exit_rest_of_compilation;'.
4452 Later on, finish_compilation will call rest_of_compilation again
4453 for those inline functions that need to have out-of-line copies
4454 generated. During that call, we *will* be routed past here. */
4456 #ifdef DBX_DEBUGGING_INFO
4457 if (write_symbols == DBX_DEBUG)
4458 TIMEVAR (symout_time, dbxout_function (decl));
4461 #ifdef DWARF_DEBUGGING_INFO
4462 if (write_symbols == DWARF_DEBUG)
4463 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
4466 #ifdef DWARF2_DEBUGGING_INFO
4467 if (write_symbols == DWARF2_DEBUG)
4468 TIMEVAR (symout_time, dwarf2out_decl (decl));
4471 exit_rest_of_compilation:
4473 /* In case the function was not output,
4474 don't leave any temporary anonymous types
4475 queued up for sdb output. */
4476 #ifdef SDB_DEBUGGING_INFO
4477 if (write_symbols == SDB_DEBUG)
4478 sdbout_types (NULL_TREE);
4481 reload_completed = 0;
4482 flow2_completed = 0;
4485 TIMEVAR (final_time,
4487 /* Clear out the insn_length contents now that they are no
4489 init_insn_lengths ();
4491 /* Clear out the real_constant_chain before some of the rtx's
4492 it runs through become garbage. */
4493 clear_const_double_mem ();
4495 /* Cancel the effect of rtl_in_current_obstack. */
4496 resume_temporary_allocation ();
4498 /* Show no temporary slots allocated. */
4501 free_basic_block_vars (0);
4504 /* Make sure volatile mem refs aren't considered valid operands for
4505 arithmetic insns. We must call this here if this is a nested inline
4506 function, since the above code leaves us in the init_recog state
4507 (from final.c), and the function context push/pop code does not
4508 save/restore volatile_ok.
4510 ??? Maybe it isn't necessary for expand_start_function to call this
4511 anymore if we do it here? */
4513 init_recog_no_volatile ();
4515 /* We're done with this function. Free up memory if we can. */
4516 free_after_parsing (current_function);
4517 if (! DECL_DEFER_OUTPUT (decl))
4518 free_after_compilation (current_function);
4519 current_function = 0;
4524 /* The parsing time is all the time spent in yyparse
4525 *except* what is spent in this function. */
4527 parse_time -= get_run_time () - start_time;
4538 printf ("Usage: %s input [switches]\n", progname);
4539 printf ("Switches:\n");
4541 printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
4542 printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
4543 printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
4544 printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
4546 for (i = NUM_ELEM (f_options); i--;)
4548 const char * description = f_options[i].description;
4550 if (description != NULL && * description != 0)
4551 printf (" -f%-21s %s\n",
4552 f_options[i].string, description);
4555 printf (" -O[number] Set optimisation level to [number]\n");
4556 printf (" -Os Optimise for space rather than speed\n");
4557 printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
4558 printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
4559 printf (" -w Suppress warnings\n");
4560 printf (" -W Enable extra warnings\n");
4562 for (i = NUM_ELEM (W_options); i--;)
4564 const char * description = W_options[i].description;
4566 if (description != NULL && * description != 0)
4567 printf (" -W%-21s %s\n",
4568 W_options[i].string, description);
4571 printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
4572 printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
4573 printf (" -p Enable function profiling\n");
4574 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
4575 printf (" -a Enable block profiling \n");
4577 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
4578 printf (" -ax Enable jump profiling \n");
4580 printf (" -o <file> Place output into <file> \n");
4581 printf (" -G <number> Put global and static data smaller than <number>\n");
4582 printf (" bytes into a special section (on some targets)\n");
4584 for (i = NUM_ELEM (debug_args); i--;)
4586 if (debug_args[i].description != NULL)
4587 printf (" -g%-21s %s\n", debug_args[i].arg, debug_args[i].description);
4590 printf (" -aux-info <file> Emit declaration info into <file>.X\n");
4591 printf (" -quiet Do not display functions compiled or elapsed time\n");
4592 printf (" -version Display the compiler's version\n");
4593 printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
4594 printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
4595 #if defined INSN_SCHEDULING
4596 printf (" -sched-verbose=<number> Set the verbosity level of the scheduler\n");
4598 printf (" --help Display this information\n");
4603 /* Display descriptions of language specific options.
4604 If there is no description, note that there is an undocumented option.
4605 If the description is empty, do not display anything. (This allows
4606 options to be deliberately undocumented, for whatever reason).
4607 If the option string is missing, then this is a marker, indicating
4608 that the description string is in fact the name of a language, whose
4609 language specific options are to follow. */
4611 if (NUM_ELEM (documented_lang_options) > 1)
4613 printf ("\nLanguage specific options:\n");
4615 for (i = 0; i < NUM_ELEM (documented_lang_options); i++)
4617 const char * description = documented_lang_options[i].description;
4618 const char * option = documented_lang_options[i].option;
4620 if (description == NULL)
4625 printf (" %-23.23s [undocumented]\n", option);
4627 else if (* description == 0)
4629 else if (option == NULL)
4633 ("\nThere are undocumented %s specific options as well.\n",
4637 printf ("\n Options for %s:\n", description);
4642 printf (" %-23.23s %s\n", option, description);
4647 printf ("\nThere are undocumented %s specific options as well.\n", lang);
4649 if (NUM_ELEM (target_switches) > 1
4650 #ifdef TARGET_OPTIONS
4651 || NUM_ELEM (target_options) > 1
4659 printf ("\nTarget specific options:\n");
4661 for (i = NUM_ELEM (target_switches); i--;)
4663 const char * option = target_switches[i].name;
4664 const char * description = target_switches[i].description;
4666 if (option == NULL || * option == 0)
4668 else if (description == NULL)
4673 printf (" -m%-21.21s [undocumented]\n", option);
4675 else if (* description != 0)
4676 doc += printf (" -m%-21.21s %s\n", option, description);
4679 #ifdef TARGET_OPTIONS
4680 for (i = NUM_ELEM (target_options); i--;)
4682 const char * option = target_options[i].prefix;
4683 const char * description = target_options[i].description;
4685 if (option == NULL || * option == 0)
4687 else if (description == NULL)
4692 printf (" -m%-21.21s [undocumented]\n", option);
4694 else if (* description != 0)
4695 doc += printf (" -m%-21.21s %s\n", option, description);
4701 printf ("\nThere are undocumented target specific options as well.\n");
4703 printf (" They exist, but they are not documented.\n");
4708 /* Parse a -d... comand line switch. */
4711 decode_d_option (arg)
4718 branch_prob_dump = 1;
4725 global_reg_dump = 1;
4741 #ifdef MACHINE_DEPENDENT_REORG
4742 mach_dep_reorg_dump = 1;
4750 branch_prob_dump = 1;
4767 global_reg_dump = 1;
4792 #ifdef MACHINE_DEPENDENT_REORG
4794 mach_dep_reorg_dump = 1;
4798 flag_print_asm_name = 1;
4819 graph_dump_format = vcg;
4825 rtl_dump_and_exit = 1;
4833 case 'D': /* These are handled by the preprocessor. */
4837 warning ("unrecognised gcc debugging option: %c", arg[-1]);
4842 /* Parse a -f... comand line switch. ARG is the value after the -f.
4843 It is safe to access 'ARG - 2' to generate the full switch name.
4844 Return the number of strings consumed. */
4847 decode_f_option (arg)
4852 /* Search for the option in the table of binary f options. */
4853 for (j = sizeof (f_options) / sizeof (f_options[0]); j--;)
4855 if (!strcmp (arg, f_options[j].string))
4857 *f_options[j].variable = f_options[j].on_value;
4861 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4862 && ! strcmp (arg + 3, f_options[j].string))
4864 *f_options[j].variable = ! f_options[j].on_value;
4869 if (!strncmp (arg, "inline-limit-", 13)
4870 || !strncmp (arg, "inline-limit=", 13))
4872 read_integral_parameter (arg + 13, arg - 2, inline_max_insns);
4873 #ifdef INSN_SCHEDULING
4874 else if (!strncmp (arg, "sched-verbose=", 14))
4875 fix_sched_param ("verbose", (const char *)(arg + 14));
4877 else if (!strncmp (arg, "fixed-", 6))
4878 fix_register ((const char *)(arg + 6), 1, 1);
4879 else if (!strncmp (arg, "call-used-", 10))
4880 fix_register ((const char *)(arg + 10), 0, 1);
4881 else if (!strncmp (arg, "call-saved-", 11))
4882 fix_register ((const char *)(arg + 11), 0, 0);
4883 else if (!strncmp (arg, "align-loops=", 12))
4884 align_loops = read_integral_parameter (arg + 12, arg - 2, align_loops);
4885 else if (!strncmp (arg, "align-functions=", 16))
4887 read_integral_parameter (arg + 16, arg - 2, align_functions);
4888 else if (!strncmp (arg, "align-jumps=", 12))
4889 align_jumps = read_integral_parameter (arg + 12, arg - 2, align_jumps);
4890 else if (!strncmp (arg, "align-labels=", 13))
4891 align_labels = read_integral_parameter (arg + 13, arg - 2, align_labels);
4892 else if (!strcmp (arg, "preprocessed"))
4893 /* Recognise this switch but do nothing. This prevents warnings
4894 about an unrecognised switch if cpplib has not been linked in. */
4902 /* Parse a -W... comand line switch. ARG is the value after the -W.
4903 It is safe to access 'ARG - 2' to generate the full switch name.
4904 Return the number of strings consumed. */
4906 decode_W_option (arg)
4911 /* Search for the option in the table of binary W options. */
4913 for (j = sizeof (W_options) / sizeof (W_options[0]); j--;)
4915 if (!strcmp (arg, W_options[j].string))
4917 *W_options[j].variable = W_options[j].on_value;
4921 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4922 && ! strcmp (arg + 3, W_options[j].string))
4924 *W_options[j].variable = ! W_options[j].on_value;
4929 if (!strncmp (arg, "id-clash-", 9))
4931 const int id_clash_val = read_integral_parameter (arg + 9, arg - 2, -1);
4933 if (id_clash_val != -1)
4935 id_clash_len = id_clash_val;
4939 else if (!strncmp (arg, "larger-than-", 12))
4941 const int larger_than_val =
4942 read_integral_parameter (arg + 12, arg - 2, -1);
4943 if (larger_than_val != -1)
4945 larger_than_size = larger_than_val;
4946 warn_larger_than = 1;
4955 /* Parse a -g... comand line switch. ARG is the value after the -g.
4956 It is safe to access 'ARG - 2' to generate the full switch name.
4957 Return the number of strings consumed. */
4960 decode_g_option (arg)
4964 /* A lot of code assumes write_symbols == NO_DEBUG if the
4965 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4966 of what debugging type has been selected). This records the
4967 selected type. It is an error to specify more than one
4969 static enum debug_info_type selected_debug_type = NO_DEBUG;
4970 /* Non-zero if debugging format has been explicitly set.
4971 -g and -ggdb don't explicitly set the debugging format so
4972 -gdwarf -g3 is equivalent to -gdwarf3. */
4973 static int type_explicitly_set_p = 0;
4974 /* Indexed by enum debug_info_type. */
4975 static const char * debug_type_names[] =
4977 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4980 /* The maximum admissible debug level value. */
4981 static const unsigned max_debug_level = 3;
4983 /* Look up ARG in the table. */
4984 for (da = debug_args; da->arg; da++)
4986 const int da_len = strlen (da->arg);
4988 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4990 enum debug_info_type type = da->debug_type;
4991 const char * p = arg + da_len;
4993 if (*p && (*p < '0' || *p > '9'))
4996 /* A debug flag without a level defaults to level 2.
4997 Note we do not want to call read_integral_parameter
4998 for that case since it will call atoi which
5001 ??? We may want to generalize the interface to
5002 read_integral_parameter to better handle this case
5003 if this case shows up often. */
5005 level = read_integral_parameter (p, 0, max_debug_level + 1);
5009 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
5011 error ("use -gdwarf -g%d for DWARF v1, level %d",
5014 error ("use -gdwarf-2 for DWARF v2");
5017 if (level > max_debug_level)
5020 ignoring option `%s' due to invalid debug level specification",
5022 level = debug_info_level;
5025 if (type == NO_DEBUG)
5027 type = PREFERRED_DEBUGGING_TYPE;
5029 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
5031 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
5032 type = DWARF2_DEBUG;
5034 #ifdef DBX_DEBUGGING_INFO
5041 if (type == NO_DEBUG)
5042 warning ("`%s': unknown or unsupported -g option", arg - 2);
5044 /* Does it conflict with an already selected type? */
5045 if (type_explicitly_set_p
5046 /* -g/-ggdb don't conflict with anything */
5047 && da->debug_type != NO_DEBUG
5048 && type != selected_debug_type)
5049 warning ("`%s' ignored, conflicts with `-g%s'",
5050 arg - 2, debug_type_names[(int) selected_debug_type]);
5053 /* If the format has already been set, -g/-ggdb
5054 only change the debug level. */
5055 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
5056 ; /* don't change debugging type */
5059 selected_debug_type = type;
5060 type_explicitly_set_p = da->debug_type != NO_DEBUG;
5063 write_symbols = (level == 0
5065 : selected_debug_type);
5066 use_gnu_debug_info_extensions = da->use_extensions_p;
5067 debug_info_level = (enum debug_info_level) level;
5075 warning ("`%s': unknown or unsupported -g option", arg - 2);
5080 /* Decode the first argument in the argv as a language-independent option.
5081 Return the number of strings consumed. 'strings_processed' is the
5082 number of strings that have already been decoded in a language
5083 specific fashion before this function was invoked. */
5086 independent_decode_option (argc, argv, strings_processed)
5089 unsigned strings_processed ATTRIBUTE_UNUSED;
5091 char * arg = argv[0];
5093 if (arg[0] != '-' || arg[1] == 0)
5105 if (!strcmp (arg, "-help"))
5120 /* Already been treated in main (). Do nothing. */
5124 set_target_switch (arg + 1);
5128 return decode_f_option (arg + 1);
5131 return decode_g_option (arg + 1);
5134 if (!strcmp (arg, "dumpbase"))
5139 dump_base_name = argv[1];
5143 decode_d_option (arg + 1);
5147 if (!strcmp (arg, "pedantic"))
5149 else if (!strcmp (arg, "pedantic-errors"))
5150 flag_pedantic_errors = pedantic = 1;
5151 else if (arg[1] == 0)
5158 if (!strcmp (arg, "quiet"))
5165 if (!strcmp (arg, "version"))
5173 inhibit_warnings = 1;
5182 /* We save the value of warn_uninitialized, since if they put
5183 -Wuninitialized on the command line, we need to generate a
5184 warning about not using it without also specifying -O. */
5185 if (warn_uninitialized != 1)
5186 warn_uninitialized = 2;
5189 return decode_W_option (arg + 1);
5195 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
5196 warning ("`-a' option (basic block profile) not supported");
5198 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
5201 else if (!strcmp (arg, "ax"))
5203 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
5204 warning ("`-ax' option (jump profiling) not supported");
5206 profile_block_flag = (!profile_block_flag
5207 || profile_block_flag == 2) ? 2 : 3;
5210 else if (!strncmp (arg, "aux-info", 8))
5212 flag_gen_aux_info = 1;
5218 aux_info_file_name = argv[1];
5222 aux_info_file_name = arg + 8;
5234 asm_file_name = argv[1];
5249 g_switch_val = read_integral_parameter (argv[1], 0, -1);
5254 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
5258 if (g_switch_val == -1)
5262 g_switch_set = TRUE;
5263 g_switch_value = g_switch_val;
5273 /* Entry point of cc1/c++. Decode command args, then call compile_file.
5274 Exit code is 35 if can't open files, 34 if fatal error,
5275 33 if had nonfatal errors, else success. */
5277 extern int main PROTO ((int, char **));
5287 /* save in case md file wants to emit args as a comment. */
5291 p = argv[0] + strlen (argv[0]);
5292 while (p != argv[0] && p[-1] != '/'
5293 #ifdef DIR_SEPARATOR
5294 && p[-1] != DIR_SEPARATOR
5300 #ifdef HAVE_LC_MESSAGES
5301 setlocale (LC_MESSAGES, "");
5303 (void) bindtextdomain (PACKAGE, localedir);
5304 (void) textdomain (PACKAGE);
5306 signal (SIGFPE, float_signal);
5309 signal (SIGPIPE, pipe_closed);
5312 decl_printable_name = decl_name;
5313 lang_expand_expr = (lang_expand_expr_t) do_abort;
5315 /* Initialize whether `char' is signed. */
5316 flag_signed_char = DEFAULT_SIGNED_CHAR;
5317 #ifdef DEFAULT_SHORT_ENUMS
5318 /* Initialize how much space enums occupy, by default. */
5319 flag_short_enums = DEFAULT_SHORT_ENUMS;
5322 /* Initialize the garbage-collector. */
5324 ggc_add_root (&input_file_stack, 1, sizeof input_file_stack,
5327 /* Perform language-specific options intialization. */
5328 lang_init_options ();
5330 /* Scan to see what optimization level has been specified. That will
5331 determine the default value of many flags. */
5332 for (i = 1; i < argc; i++)
5334 if (!strcmp (argv[i], "-O"))
5339 else if (argv[i][0] == '-' && argv[i][1] == 'O')
5341 /* Handle -Os, -O2, -O3, -O69, ... */
5342 char *p = &argv[i][2];
5344 if ((p[0] == 's') && (p[1] == 0))
5348 /* Optimizing for size forces optimize to be 2. */
5353 const int optimize_val = read_integral_parameter (p, p - 2, -1);
5354 if (optimize_val != -1)
5356 optimize = optimize_val;
5363 obey_regdecls = (optimize == 0);
5368 flag_thread_jumps = 1;
5370 flag_delayed_branch = 1;
5372 #ifdef CAN_DEBUG_WITHOUT_FP
5373 flag_omit_frame_pointer = 1;
5379 flag_cse_follow_jumps = 1;
5380 flag_cse_skip_blocks = 1;
5382 flag_expensive_optimizations = 1;
5383 flag_strength_reduce = 1;
5384 flag_rerun_cse_after_loop = 1;
5385 flag_rerun_loop_opt = 1;
5386 flag_caller_saves = 1;
5389 #ifdef INSN_SCHEDULING
5390 flag_schedule_insns = 1;
5391 flag_schedule_insns_after_reload = 1;
5394 flag_strict_aliasing = 1;
5395 flag_delete_null_pointer_checks = 1;
5400 flag_inline_functions = 1;
5403 if (optimize < 2 || optimize_size)
5408 align_functions = 1;
5411 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
5414 set_target_switch ("");
5416 #ifdef OPTIMIZATION_OPTIONS
5417 /* Allow default optimizations to be specified on a per-machine basis. */
5418 OPTIMIZATION_OPTIONS (optimize, optimize_size);
5421 /* Initialize register usage now so switches may override. */
5424 /* Perform normal command line switch decoding. */
5425 for (i = 1; i < argc;)
5427 unsigned lang_processed;
5428 unsigned indep_processed;
5430 /* Give the language a chance to decode the option for itself. */
5431 lang_processed = lang_decode_option (argc - i, argv + i);
5433 /* Now see if the option also has a language independent meaning.
5434 Some options are both language specific and language independent,
5435 eg --help. It is possible that there might be options that should
5436 only be decoded in a language independent way if the were not
5437 decoded in a langauge specific way, which is why 'lang_processed'
5439 indep_processed = independent_decode_option (argc - i, argv + i,
5442 if (lang_processed || indep_processed)
5443 i += (lang_processed > indep_processed
5444 ? lang_processed : indep_processed);
5447 const char * option = NULL;
5448 const char * lang = NULL;
5451 /* It is possible that the command line switch is not valid for the
5452 current language, but it is valid for another language. In order
5453 to be compatible with previous versions of the compiler (which
5454 did not issue an error message in this case) we check for this
5455 possibilty here. If we do find a match, then if extra_warnings
5456 is set we generate a warning message, otherwise we will just
5457 ignore the option. */
5458 for (j = 0; j < NUM_ELEM (documented_lang_options); j++)
5460 option = documented_lang_options[j].option;
5463 lang = documented_lang_options[j].description;
5464 else if (! strncmp (argv[i], option, strlen (option)))
5468 if (j != NUM_ELEM (documented_lang_options))
5472 warning ("Ignoring command line option '%s'", argv[i]);
5475 (It is valid for %s but not the selected langauge)", lang);
5479 error ("Unrecognised option `%s'", argv[i]);
5485 /* Checker uses the frame pointer. */
5486 if (flag_check_memory_usage)
5487 flag_omit_frame_pointer = 0;
5491 /* Inlining does not work if not optimizing,
5492 so force it not to be done. */
5496 /* The c_decode_option and lang_decode_option functions set
5497 this to `2' if -Wall is used, so we can avoid giving out
5498 lots of errors for people who don't realize what -Wall does. */
5499 if (warn_uninitialized == 1)
5500 warning ("-Wuninitialized is not supported without -O");
5503 #ifdef OVERRIDE_OPTIONS
5504 /* Some machines may reject certain combinations of options. */
5508 if (exceptions_via_longjmp == 2)
5510 #ifdef DWARF2_UNWIND_INFO
5511 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
5513 exceptions_via_longjmp = 1;
5517 /* Set up the align_*_log variables, defaulting them to 1 if they
5518 were still unset. */
5519 if (align_loops <= 0) align_loops = 1;
5520 align_loops_log = floor_log2 (align_loops*2-1);
5521 if (align_jumps <= 0) align_jumps = 1;
5522 align_jumps_log = floor_log2 (align_jumps*2-1);
5523 if (align_labels <= 0) align_labels = 1;
5524 align_labels_log = floor_log2 (align_labels*2-1);
5525 if (align_functions <= 0) align_functions = 1;
5526 align_functions_log = floor_log2 (align_functions*2-1);
5528 if (profile_block_flag == 3)
5530 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
5531 profile_block_flag = 2;
5534 /* Unrolling all loops implies that standard loop unrolling must also
5536 if (flag_unroll_all_loops)
5537 flag_unroll_loops = 1;
5538 /* Loop unrolling requires that strength_reduction be on also. Silently
5539 turn on strength reduction here if it isn't already on. Also, the loop
5540 unrolling code assumes that cse will be run after loop, so that must
5541 be turned on also. */
5542 if (flag_unroll_loops)
5544 flag_strength_reduce = 1;
5545 flag_rerun_cse_after_loop = 1;
5548 /* Warn about options that are not supported on this machine. */
5549 #ifndef INSN_SCHEDULING
5550 if (flag_schedule_insns || flag_schedule_insns_after_reload)
5551 warning ("instruction scheduling not supported on this target machine");
5554 if (flag_delayed_branch)
5555 warning ("this target machine does not have delayed branches");
5558 user_label_prefix = USER_LABEL_PREFIX;
5559 if (flag_leading_underscore != -1)
5561 /* If the default prefix is more complicated than "" or "_",
5562 issue a warning and ignore this option. */
5563 if (user_label_prefix[0] == 0 ||
5564 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
5566 user_label_prefix = flag_leading_underscore ? "_" : "";
5569 warning ("-f%sleading-underscore not supported on this target machine",
5570 flag_leading_underscore ? "" : "no-");
5573 /* If we are in verbose mode, write out the version and maybe all the
5574 option flags in use. */
5577 print_version (stderr, "");
5579 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
5582 compile_file (filename);
5584 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
5587 char *lim = (char *) sbrk (0);
5589 notice ("Data size %ld.\n", (long) (lim - (char *) &environ));
5594 system ("ps -l 1>&2");
5597 #endif /* not USG */
5600 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
5603 return (FATAL_EXIT_CODE);
5605 return (FATAL_EXIT_CODE);
5606 return (SUCCESS_EXIT_CODE);
5609 /* Decode -m switches. */
5610 /* Decode the switch -mNAME. */
5613 set_target_switch (name)
5617 int valid_target_option = 0;
5619 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
5620 if (!strcmp (target_switches[j].name, name))
5622 if (target_switches[j].value < 0)
5623 target_flags &= ~-target_switches[j].value;
5625 target_flags |= target_switches[j].value;
5626 valid_target_option = 1;
5629 #ifdef TARGET_OPTIONS
5630 if (!valid_target_option)
5631 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
5633 int len = strlen (target_options[j].prefix);
5634 if (!strncmp (target_options[j].prefix, name, len))
5636 *target_options[j].variable = name + len;
5637 valid_target_option = 1;
5642 if (!valid_target_option)
5643 error ("Invalid option `%s'", name);
5646 /* Print version information to FILE.
5647 Each line begins with INDENT (for the case where FILE is the
5648 assembler output file). */
5651 print_version (file, indent)
5656 #define __VERSION__ "[?]"
5660 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
5662 "%s%s%s version %s (%s) compiled by CC.\n"
5664 , indent, *indent != 0 ? " " : "",
5665 language_string, version_string, TARGET_NAME, __VERSION__);
5668 /* Print an option value and return the adjusted position in the line.
5669 ??? We don't handle error returns from fprintf (disk full); presumably
5670 other code will catch a disk full though. */
5673 print_single_switch (file, pos, max, indent, sep, term, type, name)
5676 const char *indent, *sep, *term, *type, *name;
5678 /* The ultrix fprintf returns 0 on success, so compute the result we want
5679 here since we need it for the following test. */
5680 int len = strlen (sep) + strlen (type) + strlen (name);
5685 fprintf (file, "%s", term);
5690 fprintf (file, "%s", indent);
5691 pos = strlen (indent);
5693 fprintf (file, "%s%s%s", sep, type, name);
5698 /* Print active target switches to FILE.
5699 POS is the current cursor position and MAX is the size of a "line".
5700 Each line begins with INDENT and ends with TERM.
5701 Each switch is separated from the next by SEP. */
5704 print_switch_values (file, pos, max, indent, sep, term)
5707 const char *indent, *sep, *term;
5712 /* Print the options as passed. */
5714 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
5715 _("options passed: "), "");
5717 for (p = &save_argv[1]; *p != NULL; p++)
5721 if (strcmp (*p, "-o") == 0)
5727 if (strcmp (*p, "-quiet") == 0)
5729 if (strcmp (*p, "-version") == 0)
5734 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
5737 fprintf (file, "%s", term);
5739 /* Print the -f and -m options that have been enabled.
5740 We don't handle language specific options but printing argv
5743 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
5744 _("options enabled: "), "");
5746 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
5747 if (*f_options[j].variable == f_options[j].on_value)
5748 pos = print_single_switch (file, pos, max, indent, sep, term,
5749 "-f", f_options[j].string);
5751 /* Print target specific options. */
5753 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
5754 if (target_switches[j].name[0] != '\0'
5755 && target_switches[j].value > 0
5756 && ((target_switches[j].value & target_flags)
5757 == target_switches[j].value))
5759 pos = print_single_switch (file, pos, max, indent, sep, term,
5760 "-m", target_switches[j].name);
5763 #ifdef TARGET_OPTIONS
5764 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
5765 if (*target_options[j].variable != NULL)
5768 sprintf (prefix, "-m%s", target_options[j].prefix);
5769 pos = print_single_switch (file, pos, max, indent, sep, term,
5770 prefix, *target_options[j].variable);
5774 fprintf (file, "%s", term);
5777 /* Record the beginning of a new source file, named FILENAME. */
5780 debug_start_source_file (filename)
5781 register char *filename ATTRIBUTE_UNUSED;
5783 #ifdef DBX_DEBUGGING_INFO
5784 if (write_symbols == DBX_DEBUG)
5785 dbxout_start_new_source_file (filename);
5787 #ifdef DWARF_DEBUGGING_INFO
5788 if (debug_info_level == DINFO_LEVEL_VERBOSE
5789 && write_symbols == DWARF_DEBUG)
5790 dwarfout_start_new_source_file (filename);
5791 #endif /* DWARF_DEBUGGING_INFO */
5792 #ifdef DWARF2_DEBUGGING_INFO
5793 if (debug_info_level == DINFO_LEVEL_VERBOSE
5794 && write_symbols == DWARF2_DEBUG)
5795 dwarf2out_start_source_file (filename);
5796 #endif /* DWARF2_DEBUGGING_INFO */
5797 #ifdef SDB_DEBUGGING_INFO
5798 if (write_symbols == SDB_DEBUG)
5799 sdbout_start_new_source_file (filename);
5803 /* Record the resumption of a source file. LINENO is the line number in
5804 the source file we are returning to. */
5807 debug_end_source_file (lineno)
5808 register unsigned lineno ATTRIBUTE_UNUSED;
5810 #ifdef DBX_DEBUGGING_INFO
5811 if (write_symbols == DBX_DEBUG)
5812 dbxout_resume_previous_source_file ();
5814 #ifdef DWARF_DEBUGGING_INFO
5815 if (debug_info_level == DINFO_LEVEL_VERBOSE
5816 && write_symbols == DWARF_DEBUG)
5817 dwarfout_resume_previous_source_file (lineno);
5818 #endif /* DWARF_DEBUGGING_INFO */
5819 #ifdef DWARF2_DEBUGGING_INFO
5820 if (debug_info_level == DINFO_LEVEL_VERBOSE
5821 && write_symbols == DWARF2_DEBUG)
5822 dwarf2out_end_source_file ();
5823 #endif /* DWARF2_DEBUGGING_INFO */
5824 #ifdef SDB_DEBUGGING_INFO
5825 if (write_symbols == SDB_DEBUG)
5826 sdbout_resume_previous_source_file ();
5830 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5831 the tail part of the directive line, i.e. the part which is past the
5832 initial whitespace, #, whitespace, directive-name, whitespace part. */
5835 debug_define (lineno, buffer)
5836 register unsigned lineno ATTRIBUTE_UNUSED;
5837 register char *buffer ATTRIBUTE_UNUSED;
5839 #ifdef DWARF_DEBUGGING_INFO
5840 if (debug_info_level == DINFO_LEVEL_VERBOSE
5841 && write_symbols == DWARF_DEBUG)
5842 dwarfout_define (lineno, buffer);
5843 #endif /* DWARF_DEBUGGING_INFO */
5844 #ifdef DWARF2_DEBUGGING_INFO
5845 if (debug_info_level == DINFO_LEVEL_VERBOSE
5846 && write_symbols == DWARF2_DEBUG)
5847 dwarf2out_define (lineno, buffer);
5848 #endif /* DWARF2_DEBUGGING_INFO */
5851 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5852 the tail part of the directive line, i.e. the part which is past the
5853 initial whitespace, #, whitespace, directive-name, whitespace part. */
5856 debug_undef (lineno, buffer)
5857 register unsigned lineno ATTRIBUTE_UNUSED;
5858 register char *buffer ATTRIBUTE_UNUSED;
5860 #ifdef DWARF_DEBUGGING_INFO
5861 if (debug_info_level == DINFO_LEVEL_VERBOSE
5862 && write_symbols == DWARF_DEBUG)
5863 dwarfout_undef (lineno, buffer);
5864 #endif /* DWARF_DEBUGGING_INFO */
5865 #ifdef DWARF2_DEBUGGING_INFO
5866 if (debug_info_level == DINFO_LEVEL_VERBOSE
5867 && write_symbols == DWARF2_DEBUG)
5868 dwarf2out_undef (lineno, buffer);
5869 #endif /* DWARF2_DEBUGGING_INFO */