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 set_target_switch PROTO((const char *));
155 static const char *decl_name PROTO((tree, int));
157 extern void set_fatal_function PROTO((void (*)(const char *, va_list)));
158 static void float_signal PROTO((int)) ATTRIBUTE_NORETURN;
159 static void pipe_closed PROTO((int)) ATTRIBUTE_NORETURN;
160 #ifdef ASM_IDENTIFY_LANGUAGE
161 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
162 static void output_lang_identify PROTO((FILE *)) ATTRIBUTE_UNUSED;
164 static void open_dump_file PROTO((const char *, const char *));
165 static void close_dump_file PROTO((void (*) (FILE *, rtx), rtx));
166 static void dump_rtl PROTO((const char *, tree, void (*) (FILE *, rtx), rtx));
167 static void clean_dump_file PROTO((const char *));
168 static void compile_file PROTO((char *));
169 static void display_help PROTO ((void));
170 static void report_file_and_line PROTO ((const char *, int, int));
171 static void mark_file_stack PROTO ((void *));
173 static void decode_d_option PROTO ((const char *));
174 static int decode_f_option PROTO ((const char *));
175 static int decode_W_option PROTO ((const char *));
176 static int decode_g_option PROTO ((const char *));
177 static unsigned independent_decode_option PROTO ((int, char **, unsigned));
179 static void print_version PROTO((FILE *, const char *));
180 static int print_single_switch PROTO((FILE *, int, int, const char *,
181 const char *, const char *,
182 const char *, const char *));
183 static void print_switch_values PROTO((FILE *, int, int, const char *,
184 const char *, const char *));
186 /* Length of line when printing switch values. */
189 /* Name of program invoked, sans directories. */
191 const char *progname;
193 /* Copy of arguments to main. */
197 /* Name of current original source file (what was input to cpp).
198 This comes from each #-command in the actual input. */
200 char *input_filename;
202 /* Name of top-level original source file (what was input to cpp).
203 This comes from the #-command at the beginning of the actual input.
204 If there isn't any there, then this is the cc1 input file name. */
206 char *main_input_filename;
208 /* Current line number in real source file. */
212 /* Nonzero if it is unsafe to create any new pseudo registers. */
215 /* Stack of currently pending input files. */
217 struct file_stack *input_file_stack;
219 /* Incremented on each change to input_file_stack. */
220 int input_file_stack_tick;
222 /* Name to use as base of names for dump output files. */
224 const char *dump_base_name;
226 /* Bit flags that specify the machine subtype we are compiling for.
227 Bits are tested using macros TARGET_... defined in the tm.h file
228 and set by `-m...' switches. Must be defined in rtlanal.c. */
230 extern int target_flags;
232 /* Flags saying which kinds of debugging dump have been requested. */
235 int rtl_dump_and_exit = 0;
236 int jump_opt_dump = 0;
237 int addressof_dump = 0;
242 int branch_prob_dump = 0;
244 int combine_dump = 0;
245 int regmove_dump = 0;
247 int local_reg_dump = 0;
248 int global_reg_dump = 0;
250 int peephole2_dump = 0;
252 int jump2_opt_dump = 0;
254 int dbr_sched_dump = 0;
256 int flag_print_asm_name = 0;
258 int stack_reg_dump = 0;
260 #ifdef MACHINE_DEPENDENT_REORG
261 int mach_dep_reorg_dump = 0;
263 static int flag_print_mem = 0;
264 static int version_flag = 0;
265 static char * filename = 0;
266 enum graph_dump_types graph_dump_format;
268 /* Name for output file of assembly code, specified with -o. */
272 /* Value of the -G xx switch, and whether it was passed or not. */
276 /* Type(s) of debugging information we are producing (if any).
277 See flags.h for the definitions of the different possible
278 types of debugging information. */
279 enum debug_info_type write_symbols = NO_DEBUG;
281 /* Level of debugging information we are producing. See flags.h
282 for the definitions of the different possible levels. */
283 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
285 /* Nonzero means use GNU-only extensions in the generated symbolic
286 debugging information. */
287 /* Currently, this only has an effect when write_symbols is set to
288 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
289 int use_gnu_debug_info_extensions = 0;
291 /* Nonzero means do optimizations. -O.
292 Particular numeric values stand for particular amounts of optimization;
293 thus, -O2 stores 2 here. However, the optimizations beyond the basic
294 ones are not controlled directly by this variable. Instead, they are
295 controlled by individual `flag_...' variables that are defaulted
296 based on this variable. */
300 /* Nonzero means optimize for size. -Os.
301 The only valid values are zero and non-zero. When optimize_size is
302 non-zero, optimize defaults to 2, but certain individual code
303 bloating optimizations are disabled. */
305 int optimize_size = 0;
307 /* Number of error messages and warning messages so far. */
310 int warningcount = 0;
313 /* Pointer to function to compute the name to use to print a declaration.
314 DECL is the declaration in question.
315 VERBOSITY determines what information will be printed:
316 0: DECL_NAME, demangled as necessary.
317 1: and scope information.
318 2: and any other information that might be interesting, such as function
319 parameter types in C++. */
321 const char *(*decl_printable_name) PROTO ((tree, int));
323 /* Pointer to function to compute rtl for a language-specific tree code. */
325 typedef rtx (*lang_expand_expr_t)
326 PROTO ((union tree_node *, rtx, enum machine_mode,
327 enum expand_modifier modifier));
329 lang_expand_expr_t lang_expand_expr = 0;
331 tree (*lang_expand_constant) PROTO((tree)) = 0;
333 /* Pointer to function to finish handling an incomplete decl at the
334 end of compilation. */
336 void (*incomplete_decl_finalize_hook) PROTO((tree)) = 0;
338 /* Nonzero if generating code to do profiling. */
340 int profile_flag = 0;
342 /* Nonzero if generating code to do profiling on a line-by-line basis. */
344 int profile_block_flag;
346 /* Nonzero if generating code to profile program flow graph arcs. */
348 int profile_arc_flag = 0;
350 /* Nonzero if generating info for gcov to calculate line test coverage. */
352 int flag_test_coverage = 0;
354 /* Nonzero indicates that branch taken probabilities should be calculated. */
356 int flag_branch_probabilities = 0;
358 /* Nonzero for -pedantic switch: warn about anything
359 that standard spec forbids. */
363 /* Temporarily suppress certain warnings.
364 This is set while reading code from a system header file. */
366 int in_system_header = 0;
368 /* Nonzero means do stupid register allocation.
369 Currently, this is 1 if `optimize' is 0. */
371 int obey_regdecls = 0;
373 /* Don't print functions as they are compiled and don't print
374 times taken by the various passes. -quiet. */
380 /* Nonzero means `char' should be signed. */
382 int flag_signed_char;
384 /* Nonzero means give an enum type only as many bytes as it needs. */
386 int flag_short_enums;
388 /* Nonzero for -fcaller-saves: allocate values in regs that need to
389 be saved across function calls, if that produces overall better code.
390 Optional now, so people can test it. */
392 #ifdef DEFAULT_CALLER_SAVES
393 int flag_caller_saves = 1;
395 int flag_caller_saves = 0;
398 /* Nonzero if structures and unions should be returned in memory.
400 This should only be defined if compatibility with another compiler or
401 with an ABI is needed, because it results in slower code. */
403 #ifndef DEFAULT_PCC_STRUCT_RETURN
404 #define DEFAULT_PCC_STRUCT_RETURN 1
407 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
409 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
411 /* Nonzero for -fforce-mem: load memory value into a register
412 before arithmetic on it. This makes better cse but slower compilation. */
414 int flag_force_mem = 0;
416 /* Nonzero for -fforce-addr: load memory address into a register before
417 reference to memory. This makes better cse but slower compilation. */
419 int flag_force_addr = 0;
421 /* Nonzero for -fdefer-pop: don't pop args after each function call;
422 instead save them up to pop many calls' args with one insns. */
424 int flag_defer_pop = 0;
426 /* Nonzero for -ffloat-store: don't allocate floats and doubles
427 in extended-precision registers. */
429 int flag_float_store = 0;
431 /* Nonzero for -fcse-follow-jumps:
432 have cse follow jumps to do a more extensive job. */
434 int flag_cse_follow_jumps;
436 /* Nonzero for -fcse-skip-blocks:
437 have cse follow a branch around a block. */
438 int flag_cse_skip_blocks;
440 /* Nonzero for -fexpensive-optimizations:
441 perform miscellaneous relatively-expensive optimizations. */
442 int flag_expensive_optimizations;
444 /* Nonzero for -fthread-jumps:
445 have jump optimize output of loop. */
447 int flag_thread_jumps;
449 /* Nonzero enables strength-reduction in loop.c. */
451 int flag_strength_reduce = 0;
453 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
454 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
455 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
458 int flag_unroll_loops;
460 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
461 This is generally not a win. */
463 int flag_unroll_all_loops;
465 /* Nonzero forces all invariant computations in loops to be moved
468 int flag_move_all_movables = 0;
470 /* Nonzero forces all general induction variables in loops to be
473 int flag_reduce_all_givs = 0;
475 /* Nonzero to perform full register move optimization passes. This is the
478 int flag_regmove = 0;
480 /* Nonzero for -fwritable-strings:
481 store string constants in data segment and don't uniquize them. */
483 int flag_writable_strings = 0;
485 /* Nonzero means don't put addresses of constant functions in registers.
486 Used for compiling the Unix kernel, where strange substitutions are
487 done on the assembly output. */
489 int flag_no_function_cse = 0;
491 /* Nonzero for -fomit-frame-pointer:
492 don't make a frame pointer in simple functions that don't require one. */
494 int flag_omit_frame_pointer = 0;
496 /* Nonzero means place each function into its own section on those platforms
497 which support arbitrary section names and unlimited numbers of sections. */
499 int flag_function_sections = 0;
501 /* ... and similar for data. */
503 int flag_data_sections = 0;
505 /* Nonzero to inhibit use of define_optimization peephole opts. */
507 int flag_no_peephole = 0;
509 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
510 operations in the interest of optimization. For example it allows
511 GCC to assume arguments to sqrt are nonnegative numbers, allowing
512 faster code for sqrt to be generated. */
514 int flag_fast_math = 0;
516 /* Nonzero means the front end generally wants `errno' maintained by math
517 operations, like built-in SQRT, unless overridden by flag_fast_math. */
519 int flag_errno_math = 1;
521 /* 0 means straightforward implementation of complex divide acceptable.
522 1 means wide ranges of inputs must work for complex divide.
523 2 means C9X-like requirements for complex divide (not yet implemented). */
525 int flag_complex_divide_method = 0;
527 /* Nonzero means all references through pointers are volatile. */
531 /* Nonzero means treat all global and extern variables as volatile. */
533 int flag_volatile_global;
535 /* Nonzero means treat all static variables as volatile. */
537 int flag_volatile_static;
539 /* Nonzero means just do syntax checking; don't output anything. */
541 int flag_syntax_only = 0;
543 /* Nonzero means perform global cse. */
545 static int flag_gcse;
547 /* Nonzero means to use global dataflow analysis to eliminate
548 useless null pointer tests. */
550 static int flag_delete_null_pointer_checks;
552 /* Nonzero means to rerun cse after loop optimization. This increases
553 compilation time about 20% and picks up a few more common expressions. */
555 static int flag_rerun_cse_after_loop;
557 /* Nonzero means to run loop optimizations twice. */
559 int flag_rerun_loop_opt;
561 /* Nonzero for -finline-functions: ok to inline functions that look like
562 good inline candidates. */
564 int flag_inline_functions;
566 /* Nonzero for -fkeep-inline-functions: even if we make a function
567 go inline everywhere, keep its definition around for debugging
570 int flag_keep_inline_functions;
572 /* Nonzero means that functions will not be inlined. */
576 /* Nonzero means that we should emit static const variables
577 regardless of whether or not optimization is turned on. */
579 int flag_keep_static_consts = 1;
581 /* Nonzero means we should be saving declaration info into a .X file. */
583 int flag_gen_aux_info = 0;
585 /* Specified name of aux-info file. */
587 static char *aux_info_file_name;
589 /* Nonzero means make the text shared if supported. */
591 int flag_shared_data;
593 /* Nonzero means schedule into delayed branch slots if supported. */
595 int flag_delayed_branch;
597 /* Nonzero if we are compiling pure (sharable) code.
598 Value is 1 if we are doing reasonable (i.e. simple
599 offset into offset table) pic. Value is 2 if we can
600 only perform register offsets. */
604 /* Nonzero means generate extra code for exception handling and enable
605 exception handling. */
609 /* Nonzero means use the new model for exception handling. Replaces
610 -DNEW_EH_MODEL as a compile option. */
612 int flag_new_exceptions = 1;
614 /* Nonzero means generate frame unwind info table when supported */
616 int flag_unwind_tables = 0;
618 /* Nonzero means don't place uninitialized global data in common storage
623 /* Nonzero means pretend it is OK to examine bits of target floats,
624 even if that isn't true. The resulting code will have incorrect constants,
625 but the same series of instructions that the native compiler would make. */
627 int flag_pretend_float;
629 /* Nonzero means change certain warnings into errors.
630 Usually these are warnings about failure to conform to some standard. */
632 int flag_pedantic_errors = 0;
634 /* flag_schedule_insns means schedule insns within basic blocks (before
636 flag_schedule_insns_after_reload means schedule insns after
639 int flag_schedule_insns = 0;
640 int flag_schedule_insns_after_reload = 0;
642 /* The following flags have effect only for scheduling before register
645 flag_schedule_interblock means schedule insns accross basic blocks.
646 flag_schedule_speculative means allow speculative motion of non-load insns.
647 flag_schedule_speculative_load means allow speculative motion of some
649 flag_schedule_speculative_load_dangerous allows speculative motion of more
652 int flag_schedule_interblock = 1;
653 int flag_schedule_speculative = 1;
654 int flag_schedule_speculative_load = 0;
655 int flag_schedule_speculative_load_dangerous = 0;
657 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
658 by a cheaper branch, on a count register. */
659 int flag_branch_on_count_reg;
661 /* -finhibit-size-directive inhibits output of .size for ELF.
662 This is used only for compiling crtstuff.c,
663 and it may be extended to other effects
664 needed for crtstuff.c on other systems. */
665 int flag_inhibit_size_directive = 0;
667 /* -fverbose-asm causes extra commentary information to be produced in
668 the generated assembly code (to make it more readable). This option
669 is generally only of use to those who actually need to read the
670 generated assembly code (perhaps while debugging the compiler itself).
671 -fno-verbose-asm, the default, causes the extra information
672 to be omitted and is useful when comparing two assembler files. */
674 int flag_verbose_asm = 0;
676 /* -dA causes debug commentary information to be produced in
677 the generated assembly code (to make it more readable). This option
678 is generally only of use to those who actually need to read the
679 generated assembly code (perhaps while debugging the compiler itself).
680 Currently, this switch is only used by dwarfout.c; however, it is intended
681 to be a catchall for printing debug information in the assembler file. */
683 int flag_debug_asm = 0;
685 /* -fgnu-linker specifies use of the GNU linker for initializations.
686 (Or, more generally, a linker that handles initializations.)
687 -fno-gnu-linker says that collect2 will be used. */
689 int flag_gnu_linker = 0;
691 int flag_gnu_linker = 1;
694 /* Tag all structures with __attribute__(packed) */
695 int flag_pack_struct = 0;
697 /* Emit code to check for stack overflow; also may cause large objects
698 to be allocated dynamically. */
699 int flag_stack_check;
701 /* When non-NULL, indicates that whenever space is allocated on the
702 stack, the resulting stack pointer must not pass this
703 address---that is, for stacks that grow downward, the stack pointer
704 must always be greater than or equal to this address; for stacks
705 that grow upward, the stack pointer must be less than this address.
706 At present, the rtx may be either a REG or a SYMBOL_REF, although
707 the support provided depends on the backend. */
710 /* -fcheck-memory-usage causes extra code to be generated in order to check
711 memory accesses. This is used by a detector of bad memory accesses such
713 int flag_check_memory_usage = 0;
715 /* -fprefix-function-name causes function name to be prefixed. This
716 can be used with -fcheck-memory-usage to isolate code compiled with
717 -fcheck-memory-usage. */
718 int flag_prefix_function_name = 0;
720 /* 0 if pointer arguments may alias each other. True in C.
721 1 if pointer arguments may not alias each other but may alias
723 2 if pointer arguments may not alias each other and may not
724 alias global variables. True in Fortran.
725 This defaults to 0 for C. */
726 int flag_argument_noalias = 0;
728 /* Nonzero if we should do (language-dependent) alias analysis.
729 Typically, this analysis will assume that expressions of certain
730 types do not alias expressions of certain other types. Only used
731 if alias analysis (in general) is enabled. */
732 int flag_strict_aliasing = 0;
734 /* Instrument functions with calls at entry and exit, for profiling. */
735 int flag_instrument_function_entry_exit = 0;
737 /* Nonzero means ignore `#ident' directives. 0 means handle them.
738 On SVR4 targets, it also controls whether or not to emit a
739 string identifying the compiler. */
741 int flag_no_ident = 0;
743 /* This will perform a peephole pass before sched2. */
744 int flag_peephole2 = 0;
746 /* -fbounded-pointers causes gcc to compile pointers as composite
747 objects occupying three words: the pointer value, the base address
748 of the referent object, and the address immediately beyond the end
749 of the referent object. The base and extent allow us to perform
750 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
751 int flag_bounded_pointers = 0;
753 /* -fcheck-bounds causes gcc to generate array bounds checks.
754 For C, C++: defaults to value of flag_bounded_pointers.
755 For ObjC: defaults to off.
756 For Java: defaults to on.
757 For Fortran: defaults to off.
758 For CHILL: defaults to off. */
759 int flag_bounds_check = 0;
761 /* If one, renumber instruction UIDs to reduce the number of
762 unused UIDs if there are a lot of instructions. If greater than
763 one, unconditionally renumber instruction UIDs. */
764 int flag_renumber_insns = 1;
766 /* Values of the -falign-* flags: how much to align labels in code.
767 0 means `use default', 1 means `don't align'.
768 For each variable, there is an _log variant which is the power
769 of two not less than the variable, for .align output. */
776 int align_labels_log;
778 int align_functions_log;
780 /* Table of supported debugging formats. */
784 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
785 constant expression, we use NO_DEBUG in its place. */
786 enum debug_info_type debug_type;
787 int use_extensions_p;
788 const char * description;
792 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
793 "Generate default debug format output" },
794 { "gdb", NO_DEBUG, 1, "Generate default extended debug format output" },
795 #ifdef DBX_DEBUGGING_INFO
796 { "stabs", DBX_DEBUG, 0, "Generate STABS format debug output" },
797 { "stabs+", DBX_DEBUG, 1, "Generate extended STABS format debug output" },
799 #ifdef DWARF_DEBUGGING_INFO
800 { "dwarf", DWARF_DEBUG, 0, "Generate DWARF-1 format debug output"},
801 { "dwarf+", DWARF_DEBUG, 1,
802 "Generated extended DWARF-1 format debug output" },
804 #ifdef DWARF2_DEBUGGING_INFO
805 { "dwarf-2", DWARF2_DEBUG, 0, "Enable DWARF-2 debug output" },
807 #ifdef XCOFF_DEBUGGING_INFO
808 { "xcoff", XCOFF_DEBUG, 0, "Generate XCOFF format debug output" },
809 { "xcoff+", XCOFF_DEBUG, 1, "Generate extended XCOFF format debug output" },
811 #ifdef SDB_DEBUGGING_INFO
812 { "coff", SDB_DEBUG, 0, "Generate COFF format debug output" },
822 const char * description;
824 lang_independent_options;
826 /* Add or remove a leading underscore from user symbols. */
827 int flag_leading_underscore = -1;
829 /* The user symbol prefix after having resolved same. */
830 const char *user_label_prefix;
832 /* A default for same. */
833 #ifndef USER_LABEL_PREFIX
834 #define USER_LABEL_PREFIX ""
837 /* Table of language-independent -f options.
838 STRING is the option name. VARIABLE is the address of the variable.
839 ON_VALUE is the value to store in VARIABLE
840 if `-fSTRING' is seen as an option.
841 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
843 lang_independent_options f_options[] =
845 {"float-store", &flag_float_store, 1,
846 "Do not store floats in registers" },
847 {"volatile", &flag_volatile, 1,
848 "Consider all mem refs through pointers as volatile"},
849 {"volatile-global", &flag_volatile_global, 1,
850 "Consider all mem refs to global data to be volatile" },
851 {"volatile-static", &flag_volatile_static, 1,
852 "Consider all mem refs to static data to be volatile" },
853 {"defer-pop", &flag_defer_pop, 1,
854 "Defer popping functions args from stack until later" },
855 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
856 "When possible do not generate stack frames"},
857 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
858 "When running CSE, follow jumps to their targets" },
859 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
860 "When running CSE, follow conditional jumps" },
861 {"expensive-optimizations", &flag_expensive_optimizations, 1,
862 "Perform a number of minor, expensive optimisations" },
863 {"thread-jumps", &flag_thread_jumps, 1,
864 "Perform jump threading optimisations"},
865 {"strength-reduce", &flag_strength_reduce, 1,
866 "Perform strength reduction optimisations" },
867 {"unroll-loops", &flag_unroll_loops, 1,
868 "Perform loop unrolling when iteration count is known" },
869 {"unroll-all-loops", &flag_unroll_all_loops, 1,
870 "Perform loop unrolling for all loops" },
871 {"move-all-movables", &flag_move_all_movables, 1,
872 "Force all loop invariant computations out of loops" },
873 {"reduce-all-givs", &flag_reduce_all_givs, 1,
874 "Strength reduce all loop general induction variables" },
875 {"writable-strings", &flag_writable_strings, 1,
876 "Store strings in writable data section" },
877 {"peephole", &flag_no_peephole, 0,
878 "Enable machine specific peephole optimisations" },
879 {"force-mem", &flag_force_mem, 1,
880 "Copy memory operands into registers before using" },
881 {"force-addr", &flag_force_addr, 1,
882 "Copy memory address constants into regs before using" },
883 {"function-cse", &flag_no_function_cse, 0,
884 "Allow function addresses to be held in registers" },
885 {"inline-functions", &flag_inline_functions, 1,
886 "Integrate simple functions into their callers" },
887 {"keep-inline-functions", &flag_keep_inline_functions, 1,
888 "Generate code for funcs even if they are fully inlined" },
889 {"inline", &flag_no_inline, 0,
890 "Pay attention to the 'inline' keyword"},
891 {"keep-static-consts", &flag_keep_static_consts, 1,
892 "Emit static const variables even if they are not used" },
893 {"syntax-only", &flag_syntax_only, 1,
894 "Check for syntax errors, then stop" },
895 {"shared-data", &flag_shared_data, 1,
896 "Mark data as shared rather than private" },
897 {"caller-saves", &flag_caller_saves, 1,
898 "Enable saving registers around function calls" },
899 {"pcc-struct-return", &flag_pcc_struct_return, 1,
900 "Return 'short' aggregates in memory, not registers" },
901 {"reg-struct-return", &flag_pcc_struct_return, 0,
902 "Return 'short' aggregates in registers" },
903 {"delayed-branch", &flag_delayed_branch, 1,
904 "Attempt to fill delay slots of branch instructions" },
905 {"gcse", &flag_gcse, 1,
906 "Perform the global common subexpression elimination" },
907 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
908 "Run CSE pass after loop optimisations"},
909 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
910 "Run the loop optimiser twice"},
911 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
912 "Delete useless null pointer checks" },
913 {"pretend-float", &flag_pretend_float, 1,
914 "Pretend that host and target use the same FP format"},
915 {"schedule-insns", &flag_schedule_insns, 1,
916 "Reschedule instructions to avoid pipeline stalls"},
917 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
918 "Run two passes of the instruction scheduler"},
919 {"sched-interblock",&flag_schedule_interblock, 1,
920 "Enable scheduling across basic blocks" },
921 {"sched-spec",&flag_schedule_speculative, 1,
922 "Allow speculative motion of non-loads" },
923 {"sched-spec-load",&flag_schedule_speculative_load, 1,
924 "Allow speculative motion of some loads" },
925 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
926 "Allow speculative motion of more loads" },
927 {"branch-count-reg",&flag_branch_on_count_reg, 1,
928 "Replace add,compare,branch with branch on count reg"},
929 {"pic", &flag_pic, 1,
930 "Generate position independent code, if possible"},
931 {"PIC", &flag_pic, 2, ""},
932 {"exceptions", &flag_exceptions, 1,
933 "Enable exception handling" },
934 {"new-exceptions", &flag_new_exceptions, 1,
935 "Use the new model for exception handling" },
936 {"unwind-tables", &flag_unwind_tables, 1,
937 "Just generate unwind tables for exception handling" },
938 {"sjlj-exceptions", &exceptions_via_longjmp, 1,
939 "Use setjmp/longjmp to handle exceptions" },
940 {"asynchronous-exceptions", &asynchronous_exceptions, 1,
941 "Support asynchronous exceptions" },
942 {"profile-arcs", &profile_arc_flag, 1,
943 "Insert arc based program profiling code" },
944 {"test-coverage", &flag_test_coverage, 1,
945 "Create data files needed by gcov" },
946 {"branch-probabilities", &flag_branch_probabilities, 1,
947 "Use profiling information for branch probabilities" },
948 {"fast-math", &flag_fast_math, 1,
949 "Improve FP speed by violating ANSI & IEEE rules" },
950 {"common", &flag_no_common, 0,
951 "Do not put unitialised globals in the common section" },
952 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
953 "Do not generate .size directives" },
954 {"function-sections", &flag_function_sections, 1,
955 "place each function into its own section" },
956 {"data-sections", &flag_data_sections, 1,
957 "place data items into their own section" },
958 {"verbose-asm", &flag_verbose_asm, 1,
959 "Add extra commentry to assembler output"},
960 {"gnu-linker", &flag_gnu_linker, 1,
961 "Output GNU ld formatted global initialisers"},
962 {"regmove", &flag_regmove, 1,
963 "Enables a register move optimisation"},
964 {"optimize-register-move", &flag_regmove, 1,
965 "Do the full regmove optimization pass"},
966 {"pack-struct", &flag_pack_struct, 1,
967 "Pack structure members together without holes" },
968 {"stack-check", &flag_stack_check, 1,
969 "Insert stack checking code into the program" },
970 {"argument-alias", &flag_argument_noalias, 0,
971 "Specify that arguments may alias each other & globals"},
972 {"argument-noalias", &flag_argument_noalias, 1,
973 "Assume arguments may alias globals but not each other"},
974 {"argument-noalias-global", &flag_argument_noalias, 2,
975 "Assume arguments do not alias each other or globals" },
976 {"strict-aliasing", &flag_strict_aliasing, 1,
977 "Assume strict aliasing rules apply" },
978 {"align-loops", &align_loops, 0,
979 "Align the start of loops" },
980 {"align-jumps", &align_jumps, 0,
981 "Align labels which are only reached by jumping" },
982 {"align-labels", &align_labels, 0,
983 "Align all labels" },
984 {"align-functions", &align_functions, 0,
985 "Align the start of functions" },
986 {"check-memory-usage", &flag_check_memory_usage, 1,
987 "Generate code to check every memory access" },
988 {"prefix-function-name", &flag_prefix_function_name, 1,
989 "Add a prefix to all function names" },
990 {"dump-unnumbered", &flag_dump_unnumbered, 1,
991 "Suppress output of instruction numbers and line number notes in debugging dumps"},
992 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
993 "Instrument function entry/exit with profiling calls"},
994 {"leading-underscore", &flag_leading_underscore, 1,
995 "External symbols have a leading underscore" },
996 {"ident", &flag_no_ident, 0,
997 "Process #ident directives"},
998 { "peephole2", &flag_peephole2, 1,
999 "Enables an rtl peephole pass run before sched2" },
1000 {"math-errno", &flag_errno_math, 1,
1001 "Set errno after built-in math functions"},
1002 {"bounded-pointers", &flag_bounded_pointers, 1,
1003 "Compile pointers as triples: value, base & end" },
1004 {"bounds-check", &flag_bounds_check, 1,
1005 "Generate code to check bounds before dereferencing pointers and arrays" }
1008 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1010 /* Table of language-specific options. */
1012 static struct lang_opt
1014 const char * option;
1015 const char * description;
1017 documented_lang_options[] =
1019 /* In order not to overload the --help output, the convention
1020 used here is to only describe those options which are not
1021 enabled by default. */
1023 { "-ansi", "Compile just for ANSI C" },
1024 { "-fallow-single-precision",
1025 "Do not promote floats to double if using -traditional" },
1026 { "-std= ", "Determine language standard"},
1028 { "-fsigned-bitfields", "" },
1029 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1030 { "-fno-signed-bitfields", "" },
1031 { "-fno-unsigned-bitfields","" },
1032 { "-fsigned-char", "Make 'char' be signed by default"},
1033 { "-funsigned-char", "Make 'char' be unsigned by default"},
1034 { "-fno-signed-char", "" },
1035 { "-fno-unsigned-char", "" },
1037 { "-ftraditional", "" },
1038 { "-traditional", "Attempt to support traditional K&R style C"},
1039 { "-fnotraditional", "" },
1040 { "-fno-traditional", "" },
1043 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1044 { "-fbuiltin", "" },
1045 { "-fno-builtin", "Do not recognise any built in functions" },
1046 { "-fhosted", "Assume normal C execution environment" },
1047 { "-fno-hosted", "" },
1049 "Assume that standard libraries & main might not exist" },
1050 { "-fno-freestanding", "" },
1051 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1052 { "-fno-cond-mismatch", "" },
1053 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1054 { "-fno-dollars-in-identifiers", "" },
1055 { "-fpreprocessed", "" },
1056 { "-fno-preprocessed", "" },
1057 { "-fshort-double", "Use the same size for double as for float" },
1058 { "-fno-short-double", "" },
1059 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1060 { "-fno-short-enums", "" },
1061 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1062 { "-fno-short-wchar", "" },
1064 { "-Wall", "Enable most warning messages" },
1065 { "-Wbad-function-cast",
1066 "Warn about casting functions to incompatible types" },
1067 { "-Wno-bad-function-cast", "" },
1068 { "-Wmissing-noreturn",
1069 "Warn about functions which might be candidates for attribute noreturn" },
1070 { "-Wno-missing-noreturn", "" },
1071 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1072 { "-Wno-cast-qual", "" },
1073 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1074 { "-Wno-char-subscripts", "" },
1075 { "-Wcomment", "Warn if nested comments are detected" },
1076 { "-Wno-comment", "" },
1077 { "-Wcomments", "Warn if nested comments are detected" },
1078 { "-Wno-comments", "" },
1079 { "-Wconversion", "Warn about possibly confusing type conversions" },
1080 { "-Wno-conversion", "" },
1081 { "-Wformat", "Warn about printf format anomalies" },
1082 { "-Wno-format", "" },
1083 { "-Wimplicit-function-declaration",
1084 "Warn about implicit function declarations" },
1085 { "-Wno-implicit-function-declaration", "" },
1086 { "-Werror-implicit-function-declaration", "" },
1087 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1088 { "-Wno-implicit-int", "" },
1089 { "-Wimplicit", "" },
1090 { "-Wno-implicit", "" },
1091 { "-Wimport", "Warn about the use of the #import directive" },
1092 { "-Wno-import", "" },
1093 { "-Wlong-long","" },
1094 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1095 { "-Wmain", "Warn about suspicious declarations of main" },
1096 { "-Wno-main", "" },
1097 { "-Wmissing-braces",
1098 "Warn about possibly missing braces around initialisers" },
1099 { "-Wno-missing-braces", "" },
1100 { "-Wmissing-declarations",
1101 "Warn about global funcs without previous declarations"},
1102 { "-Wno-missing-declarations", "" },
1103 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1104 { "-Wno-missing-prototypes", "" },
1105 { "-Wmultichar", "Warn about use of multicharacter literals"},
1106 { "-Wno-multichar", "" },
1107 { "-Wnested-externs", "Warn about externs not at file scope level" },
1108 { "-Wno-nested-externs", "" },
1109 { "-Wparentheses", "Warn about possible missing parentheses" },
1110 { "-Wno-parentheses", "" },
1111 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1112 { "-Wno-pointer-arith", "" },
1113 { "-Wredundant-decls",
1114 "Warn about multiple declarations of the same object" },
1115 { "-Wno-redundant-decls", "" },
1116 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1117 { "-Wno-sign-compare", "" },
1118 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1119 { "-Wno-float-equal", "" },
1120 { "-Wunknown-pragmas", "Warn about unrecognised pragmas" },
1121 { "-Wno-unknown-pragmas", "" },
1122 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1123 { "-Wno-strict-prototypes", "" },
1124 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1125 { "-Wno-traditional", "" },
1126 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1127 { "-Wno-trigraphs", "" },
1129 { "-Wno-undef", "" },
1130 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1131 { "-Wno-write-strings", "" },
1133 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1135 /* These are for Objective C. */
1136 DEFINE_LANG_NAME ("Objective C")
1138 { "-lang-objc", "" },
1139 { "-gen-decls", "Dump decls to a .decl file" },
1140 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1141 { "-fno-gnu-runtime", "" },
1142 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1143 { "-fno-next-runtime", "" },
1144 { "-Wselector", "Warn if a selector has multiple methods" },
1145 { "-Wno-selector", "" },
1146 { "-Wprotocol", "" },
1147 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1148 { "-print-objc-runtime-info",
1149 "Generate C header of platform specific features" },
1151 #include "options.h"
1155 /* Here is a table, controlled by the tm.h file, listing each -m switch
1156 and which bits in `target_switches' it should set or clear.
1157 If VALUE is positive, it is bits to set.
1158 If VALUE is negative, -VALUE is bits to clear.
1159 (The sign bit is not used so there is no confusion.) */
1165 const char * description;
1167 target_switches [] = TARGET_SWITCHES;
1169 /* This table is similar, but allows the switch to have a value. */
1171 #ifdef TARGET_OPTIONS
1174 const char * prefix;
1175 const char ** variable;
1176 const char * description;
1178 target_options [] = TARGET_OPTIONS;
1181 /* Options controlling warnings */
1183 /* Don't print warning messages. -w. */
1185 int inhibit_warnings = 0;
1187 /* Print various extra warnings. -W. */
1189 int extra_warnings = 0;
1191 /* Treat warnings as errors. -Werror. */
1193 int warnings_are_errors = 0;
1195 /* Nonzero to warn about unused local variables. */
1199 /* Nonzero to warn about code which is never reached. */
1201 int warn_notreached;
1203 /* Nonzero to warn about variables used before they are initialized. */
1205 int warn_uninitialized;
1207 /* Nonzero means warn about all declarations which shadow others. */
1211 /* Warn if a switch on an enum fails to have a case for every enum value. */
1215 /* Nonzero means warn about function definitions that default the return type
1216 or that use a null return and have a return-type other than void. */
1218 int warn_return_type;
1220 /* Nonzero means warn about pointer casts that increase the required
1221 alignment of the target type (and might therefore lead to a crash
1222 due to a misaligned access). */
1224 int warn_cast_align;
1226 /* Nonzero means warn about any identifiers that match in the first N
1227 characters. The value N is in `id_clash_len'. */
1230 unsigned id_clash_len;
1232 /* Nonzero means warn about any objects definitions whose size is larger
1233 than N bytes. Also want about function definitions whose returned
1234 values are larger than N bytes. The value N is in `larger_than_size'. */
1236 int warn_larger_than;
1237 unsigned larger_than_size;
1239 /* Nonzero means warn if inline function is too large. */
1243 /* Warn if a function returns an aggregate,
1244 since there are often incompatible calling conventions for doing this. */
1246 int warn_aggregate_return;
1248 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1252 /* Warn when gcc pads a structure to an alignment boundary. */
1256 /* Likewise for -W. */
1258 lang_independent_options W_options[] =
1260 {"unused", &warn_unused, 1, "Warn when a variable is unused" },
1261 {"error", &warnings_are_errors, 1, ""},
1262 {"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
1263 {"switch", &warn_switch, 1,
1264 "Warn about enumerated switches missing a specific case" },
1265 {"aggregate-return", &warn_aggregate_return, 1,
1266 "Warn about returning structures, unions or arrays" },
1267 {"cast-align", &warn_cast_align, 1,
1268 "Warn about pointer casts which increase alignment" },
1269 {"unreachable-code", &warn_notreached, 1,
1270 "Warn about code that will never be executed" },
1271 {"uninitialized", &warn_uninitialized, 1,
1272 "Warn about unitialized automatic variables"},
1273 {"inline", &warn_inline, 1,
1274 "Warn when an inlined function cannot be inlined"},
1275 {"packed", &warn_packed, 1,
1276 "Warn when the packed attribute has no effect on struct layout"},
1277 {"padded", &warn_padded, 1,
1278 "Warn when padding is required to align struct members"}
1281 /* Output files for assembler code (real compiler output)
1282 and debugging dumps. */
1285 FILE *aux_info_file;
1286 FILE *rtl_dump_file = NULL;
1288 /* Decode the string P as an integral parameter.
1289 If the string is indeed an integer return its numeric value else
1290 issue an Invalid Option error for the option PNAME and return DEFVAL.
1291 If PNAME is zero just return DEFVAL, do not call error. */
1294 read_integral_parameter (p, pname, defval)
1299 const char *endp = p;
1303 if (*endp >= '0' && *endp <= '9')
1312 error ("Invalid option `%s'", pname);
1320 /* Time accumulators, to count the total time spent in various passes. */
1324 int integration_time;
1330 int branch_prob_time;
1335 int local_alloc_time;
1336 int global_alloc_time;
1341 int shorten_branch_time;
1349 /* Return time used so far, in microseconds. */
1359 #else /* not BeOS */
1360 #if defined (_WIN32) && !defined (__CYGWIN__)
1364 return (clock() * 1000);
1365 #else /* not _WIN32 */
1371 tick = 1000000 / sysconf(_SC_CLK_TCK);
1373 return (tms.tms_utime + tms.tms_stime) * tick;
1379 # if HAVE_SYSCONF && defined _SC_CLK_TCK
1380 # define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
1383 # define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
1385 # define TICKS_PER_SECOND HZ /* traditional UNIX */
1389 return (tms.tms_utime + tms.tms_stime) * (1000000 / TICKS_PER_SECOND);
1394 struct rusage rusage;
1395 getrusage (0, &rusage);
1396 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
1397 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
1404 int proc_system_time;
1405 int child_user_time;
1406 int child_system_time;
1408 times ((void *) &vms_times);
1409 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
1413 #endif /* _SC_CLK_TCK */
1415 #endif /* __BEOS__ */
1418 #define TIMEVAR(VAR, BODY) \
1419 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
1422 print_time (str, total)
1427 "time in %s: %d.%06d (%.0f%%)\n",
1428 str, total / 1000000, total % 1000000,
1429 (double)total / (double)all_time * 100.0);
1432 /* This is the default decl_printable_name function. */
1435 decl_name (decl, verbosity)
1437 int verbosity ATTRIBUTE_UNUSED;
1439 return IDENTIFIER_POINTER (DECL_NAME (decl));
1442 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1447 struct file_stack *stack = *(struct file_stack **)p;
1449 /* We're only called for input_file_stack, so we can mark the current
1450 input_filename here as well. */
1451 ggc_mark_string (main_input_filename);
1452 ggc_mark_string (input_filename);
1456 ggc_mark_string (stack->name);
1457 stack = stack->next;
1462 /* This calls abort and is used to avoid problems when abort if a macro.
1463 It is used when we need to pass the address of abort. */
1471 /* When `malloc.c' is compiled with `rcheck' defined,
1472 it calls this function to report clobberage. */
1476 const char * s ATTRIBUTE_UNUSED;
1481 /* Return the logarithm of X, base 2, considering X unsigned,
1482 if X is a power of 2. Otherwise, returns -1.
1484 This should be used via the `exact_log2' macro. */
1488 register unsigned HOST_WIDE_INT x;
1490 register int log = 0;
1491 /* Test for 0 or a power of 2. */
1492 if (x == 0 || x != (x & -x))
1494 while ((x >>= 1) != 0)
1499 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1500 If X is 0, return -1.
1502 This should be used via the floor_log2 macro. */
1506 register unsigned HOST_WIDE_INT x;
1508 register int log = -1;
1515 static int float_handler_set;
1517 jmp_buf float_handler;
1519 /* Signals actually come here. */
1522 float_signal (signo)
1523 /* If this is missing, some compilers complain. */
1524 int signo ATTRIBUTE_UNUSED;
1526 if (float_handled == 0)
1528 #if defined (USG) || defined (hpux)
1529 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1532 signal (SIGFPE, float_signal);
1533 longjmp (float_handler, 1);
1536 /* Specify where to longjmp to when a floating arithmetic error happens.
1537 If HANDLER is 0, it means don't handle the errors any more. */
1540 set_float_handler (handler)
1543 float_handled = (handler != 0);
1545 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1547 if (float_handled && ! float_handler_set)
1549 signal (SIGFPE, float_signal);
1550 float_handler_set = 1;
1554 /* This is a wrapper function for code which might elicit an
1555 arithmetic exception. That code should be passed in as a function
1556 pointer FN, and one argument DATA. DATA is usually a struct which
1557 contains the real input and output for function FN. This function
1558 returns 0 (failure) if longjmp was called (i.e. an exception
1559 occured.) It returns 1 (success) otherwise. */
1562 do_float_handler (fn, data)
1563 void (*fn) PROTO ((PTR));
1570 /* We got here via longjmp() caused by an exception in function fn() */
1571 set_float_handler (NULL);
1575 set_float_handler (buf);
1577 set_float_handler (NULL);
1581 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1582 error happens, pushing the previous specification into OLD_HANDLER.
1583 Return an indication of whether there was a previous handler in effect. */
1586 push_float_handler (handler, old_handler)
1587 jmp_buf handler, old_handler;
1589 int was_handled = float_handled;
1593 memcpy ((char *) old_handler, (char *) float_handler,
1594 sizeof (float_handler));
1596 memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
1600 /* Restore the previous specification of whether and where to longjmp to
1601 when a floating arithmetic error happens. */
1604 pop_float_handler (handled, handler)
1608 float_handled = handled;
1610 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1613 /* Handler for SIGPIPE. */
1617 /* If this is missing, some compilers complain. */
1618 int signo ATTRIBUTE_UNUSED;
1620 fatal ("output pipe has been closed");
1623 /* Strip off a legitimate source ending from the input string NAME of
1624 length LEN. Rather than having to know the names used by all of
1625 our front ends, we strip off an ending of a period followed by
1626 up to five characters. (Java uses ".class".) */
1629 strip_off_ending (name, len)
1634 for (i = 2; i < 6 && len > i; i++)
1636 if (name[len - i] == '.')
1638 name[len - i] = '\0';
1644 /* Output a quoted string. */
1647 output_quoted_string (asm_file, string)
1651 #ifdef OUTPUT_QUOTED_STRING
1652 OUTPUT_QUOTED_STRING (asm_file, string);
1656 putc ('\"', asm_file);
1657 while ((c = *string++) != 0)
1659 if (c == '\"' || c == '\\')
1660 putc ('\\', asm_file);
1663 putc ('\"', asm_file);
1667 /* Output a file name in the form wanted by System V. */
1670 output_file_directive (asm_file, input_name)
1672 const char *input_name;
1674 int len = strlen (input_name);
1675 const char *na = input_name + len;
1677 /* NA gets INPUT_NAME sans directory names. */
1678 while (na > input_name)
1682 #ifdef DIR_SEPARATOR
1683 if (na[-1] == DIR_SEPARATOR)
1689 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1690 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1692 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1693 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1695 fprintf (asm_file, "\t.file\t");
1696 output_quoted_string (asm_file, na);
1697 fputc ('\n', asm_file);
1702 #ifdef ASM_IDENTIFY_LANGUAGE
1703 /* Routine to build language identifier for object file. */
1705 output_lang_identify (asm_out_file)
1708 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1709 char *s = (char *) alloca (len);
1710 sprintf (s, "__gnu_compiled_%s", lang_identify ());
1711 ASM_OUTPUT_LABEL (asm_out_file, s);
1715 /* Routine to open a dump file. */
1717 open_dump_file (suffix, function_name)
1719 const char *function_name;
1726 dumpname = concat (dump_base_name, suffix, NULL);
1728 if (rtl_dump_file != NULL)
1729 fclose (rtl_dump_file);
1731 rtl_dump_file = fopen (dumpname, "a");
1733 if (rtl_dump_file == NULL)
1734 pfatal_with_name (dumpname);
1739 fprintf (rtl_dump_file, "\n;; Function %s\n\n", function_name);
1745 /* Routine to close a dump file. */
1747 close_dump_file (func, insns)
1748 void (*func) PROTO ((FILE *, rtx));
1755 func (rtl_dump_file, insns);
1757 fflush (rtl_dump_file);
1758 fclose (rtl_dump_file);
1760 rtl_dump_file = NULL;
1766 /* Routine to dump rtl into a file. */
1768 dump_rtl (suffix, decl, func, insns)
1771 void (*func) PROTO ((FILE *, rtx));
1774 open_dump_file (suffix, decl_printable_name (decl, 2));
1775 close_dump_file (func, insns);
1778 /* Routine to empty a dump file. */
1780 clean_dump_file (suffix)
1783 char * const dumpname = concat (dump_base_name, suffix, NULL);
1785 rtl_dump_file = fopen (dumpname, "w");
1787 if (rtl_dump_file == NULL)
1788 pfatal_with_name (dumpname);
1792 fclose (rtl_dump_file);
1793 rtl_dump_file = NULL;
1798 /* Do any final processing required for the declarations in VEC, of
1799 which there are LEN. We write out inline functions and variables
1800 that have been deferred until this point, but which are required.
1801 Returns non-zero if anything was put out. */
1803 wrapup_global_declarations (vec, len)
1810 int output_something = 0;
1812 for (i = 0; i < len; i++)
1816 /* We're not deferring this any longer. */
1817 DECL_DEFER_OUTPUT (decl) = 0;
1819 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1820 && incomplete_decl_finalize_hook != 0)
1821 (*incomplete_decl_finalize_hook) (decl);
1824 /* Now emit any global variables or functions that we have been
1825 putting off. We need to loop in case one of the things emitted
1826 here references another one which comes earlier in the list. */
1830 for (i = 0; i < len; i++)
1834 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1837 /* Don't write out static consts, unless we still need them.
1839 We also keep static consts if not optimizing (for debugging),
1840 unless the user specified -fno-keep-static-consts.
1841 ??? They might be better written into the debug information.
1842 This is possible when using DWARF.
1844 A language processor that wants static constants to be always
1845 written out (even if it is not used) is responsible for
1846 calling rest_of_decl_compilation itself. E.g. the C front-end
1847 calls rest_of_decl_compilation from finish_decl.
1848 One motivation for this is that is conventional in some
1849 environments to write things like:
1850 static const char rcsid[] = "... version string ...";
1851 intending to force the string to be in the executable.
1853 A language processor that would prefer to have unneeded
1854 static constants "optimized away" would just defer writing
1855 them out until here. E.g. C++ does this, because static
1856 constants are often defined in header files.
1858 ??? A tempting alternative (for both C and C++) would be
1859 to force a constant to be written if and only if it is
1860 defined in a main file, as opposed to an include file. */
1862 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1863 && (! TREE_READONLY (decl)
1864 || TREE_PUBLIC (decl)
1865 || (!optimize && flag_keep_static_consts)
1866 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1869 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1872 if (TREE_CODE (decl) == FUNCTION_DECL
1873 && DECL_INITIAL (decl) != 0
1874 && DECL_SAVED_INSNS (decl) != 0
1875 && (flag_keep_inline_functions
1876 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1877 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1880 temporary_allocation ();
1881 output_inline_function (decl);
1882 permanent_allocation (1);
1887 output_something = 1;
1891 return output_something;
1894 /* Issue appropriate warnings for the global declarations in VEC (of
1895 which there are LEN). Output debugging information for them. */
1897 check_global_declarations (vec, len)
1904 for (i = 0; i < len; i++)
1908 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1909 && ! TREE_ASM_WRITTEN (decl))
1910 /* Cancel the RTL for this decl so that, if debugging info
1911 output for global variables is still to come,
1912 this one will be omitted. */
1913 DECL_RTL (decl) = NULL;
1915 /* Warn about any function
1916 declared static but not defined.
1917 We don't warn about variables,
1918 because many programs have static variables
1919 that exist only to get some text into the object file. */
1920 if (TREE_CODE (decl) == FUNCTION_DECL
1922 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1923 && DECL_INITIAL (decl) == 0
1924 && DECL_EXTERNAL (decl)
1925 && ! DECL_ARTIFICIAL (decl)
1926 && ! TREE_PUBLIC (decl))
1928 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1929 pedwarn_with_decl (decl,
1930 "`%s' used but never defined");
1932 warning_with_decl (decl,
1933 "`%s' declared `static' but never defined");
1934 /* This symbol is effectively an "extern" declaration now. */
1935 TREE_PUBLIC (decl) = 1;
1936 assemble_external (decl);
1939 /* Warn about static fns or vars defined but not used,
1940 but not about inline functions or static consts
1941 since defining those in header files is normal practice. */
1943 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
1944 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
1945 && ! DECL_IN_SYSTEM_HEADER (decl)
1946 && ! DECL_EXTERNAL (decl)
1947 && ! TREE_PUBLIC (decl)
1948 && ! TREE_USED (decl)
1949 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
1950 /* The TREE_USED bit for file-scope decls
1951 is kept in the identifier, to handle multiple
1952 external decls in different scopes. */
1953 && ! TREE_USED (DECL_NAME (decl)))
1954 warning_with_decl (decl, "`%s' defined but not used");
1956 #ifdef SDB_DEBUGGING_INFO
1957 /* The COFF linker can move initialized global vars to the end.
1958 And that can screw up the symbol ordering.
1959 By putting the symbols in that order to begin with,
1960 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1961 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1962 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1963 && ! DECL_EXTERNAL (decl)
1964 && DECL_RTL (decl) != 0)
1965 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
1967 /* Output COFF information for non-global
1968 file-scope initialized variables. */
1969 if (write_symbols == SDB_DEBUG
1970 && TREE_CODE (decl) == VAR_DECL
1971 && DECL_INITIAL (decl)
1972 && ! DECL_EXTERNAL (decl)
1973 && DECL_RTL (decl) != 0
1974 && GET_CODE (DECL_RTL (decl)) == MEM)
1975 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
1976 #endif /* SDB_DEBUGGING_INFO */
1977 #ifdef DWARF_DEBUGGING_INFO
1978 /* Output DWARF information for file-scope tentative data object
1979 declarations, file-scope (extern) function declarations (which
1980 had no corresponding body) and file-scope tagged type declarations
1981 and definitions which have not yet been forced out. */
1983 if (write_symbols == DWARF_DEBUG
1984 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1985 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
1987 #ifdef DWARF2_DEBUGGING_INFO
1988 /* Output DWARF2 information for file-scope tentative data object
1989 declarations, file-scope (extern) function declarations (which
1990 had no corresponding body) and file-scope tagged type declarations
1991 and definitions which have not yet been forced out. */
1993 if (write_symbols == DWARF2_DEBUG
1994 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1995 TIMEVAR (symout_time, dwarf2out_decl (decl));
2000 /* Compile an entire file of output from cpp, named NAME.
2001 Write a file of assembly output and various debugging dumps. */
2010 int name_specified = name != 0;
2012 if (dump_base_name == 0)
2013 dump_base_name = name ? name : "gccdump";
2017 integration_time = 0;
2023 branch_prob_time = 0;
2028 local_alloc_time = 0;
2029 global_alloc_time = 0;
2034 shorten_branch_time = 0;
2040 /* Initialize data in various passes. */
2044 name = init_parse (name);
2045 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2046 || debug_info_level == DINFO_LEVEL_VERBOSE
2047 || flag_test_coverage
2048 || warn_notreached);
2050 init_decl_processing ();
2057 init_function_once ();
2058 init_stor_layout_once ();
2059 init_varasm_once ();
2061 /* The following initialization functions need to generate rtl, so
2062 provide a dummy function context for them. */
2063 init_dummy_function_start ();
2066 if (flag_caller_saves)
2067 init_caller_save ();
2068 expand_dummy_function_end ();
2070 /* If auxiliary info generation is desired, open the output file.
2071 This goes in the same directory as the source file--unlike
2072 all the other output files. */
2073 if (flag_gen_aux_info)
2075 aux_info_file = fopen (aux_info_file_name, "w");
2076 if (aux_info_file == 0)
2077 pfatal_with_name (aux_info_file_name);
2080 /* Clear the dump files. */
2082 clean_dump_file (".00.rtl");
2085 clean_dump_file (".01.jump");
2086 if (graph_dump_format != no_graph)
2087 clean_graph_dump_file (dump_base_name, ".01.jump");
2091 clean_dump_file (".02.cse");
2092 if (graph_dump_format != no_graph)
2093 clean_graph_dump_file (dump_base_name, ".02.cse");
2097 clean_dump_file (".03.addressof");
2098 if (graph_dump_format != no_graph)
2099 clean_graph_dump_file (dump_base_name, ".03.addressof");
2103 clean_dump_file (".04.gcse");
2104 if (graph_dump_format != no_graph)
2105 clean_graph_dump_file (dump_base_name, ".04.gcse");
2109 clean_dump_file (".05.loop");
2110 if (graph_dump_format != no_graph)
2111 clean_graph_dump_file (dump_base_name, ".05.loop");
2115 clean_dump_file (".06.cse2");
2116 if (graph_dump_format != no_graph)
2117 clean_graph_dump_file (dump_base_name, ".06.cse2");
2119 if (branch_prob_dump)
2121 clean_dump_file (".07.bp");
2122 if (graph_dump_format != no_graph)
2123 clean_graph_dump_file (dump_base_name, ".07.bp");
2127 clean_dump_file (".08.flow");
2128 if (graph_dump_format != no_graph)
2129 clean_graph_dump_file (dump_base_name, ".08.flow");
2133 clean_dump_file (".09.combine");
2134 if (graph_dump_format != no_graph)
2135 clean_graph_dump_file (dump_base_name, ".09.combine");
2139 clean_dump_file (".10.regmove");
2140 if (graph_dump_format != no_graph)
2141 clean_graph_dump_file (dump_base_name, ".10.regmove");
2143 #ifdef INSN_SCHEDULING
2146 clean_dump_file (".11.sched");
2147 if (graph_dump_format != no_graph)
2148 clean_graph_dump_file (dump_base_name, ".11.sched");
2153 clean_dump_file (".12.lreg");
2154 if (graph_dump_format != no_graph)
2155 clean_graph_dump_file (dump_base_name, ".12.lreg");
2157 if (global_reg_dump)
2159 clean_dump_file (".13.greg");
2160 if (graph_dump_format != no_graph)
2161 clean_graph_dump_file (dump_base_name, ".13.greg");
2165 clean_dump_file (".14.flow2");
2166 if (graph_dump_format != no_graph)
2167 clean_graph_dump_file (dump_base_name, ".14.flow2");
2169 #ifdef HAVE_peephole2
2172 clean_dump_file (".15.peephole2");
2173 if (graph_dump_format != no_graph)
2174 clean_graph_dump_file (dump_base_name, ".15.peephole2");
2177 #ifdef INSN_SCHEDULING
2180 clean_dump_file (".16.sched2");
2181 if (graph_dump_format != no_graph)
2182 clean_graph_dump_file (dump_base_name, ".16.sched2");
2187 clean_dump_file (".17.jump2");
2188 if (graph_dump_format != no_graph)
2189 clean_graph_dump_file (dump_base_name, ".17.jump2");
2191 #ifdef MACHINE_DEPENDENT_REORG
2192 if (mach_dep_reorg_dump)
2194 clean_dump_file (".18.mach");
2195 if (graph_dump_format != no_graph)
2196 clean_graph_dump_file (dump_base_name, ".18.mach");
2202 clean_dump_file (".19.dbr");
2203 if (graph_dump_format != no_graph)
2204 clean_graph_dump_file (dump_base_name, ".19.dbr");
2210 clean_dump_file (".20.stack");
2211 if (graph_dump_format != no_graph)
2212 clean_graph_dump_file (dump_base_name, ".20.stack");
2216 /* Open assembler code output file. */
2218 if (flag_syntax_only)
2219 asm_out_file = NULL;
2222 if (! name_specified && asm_file_name == 0)
2223 asm_out_file = stdout;
2226 if (asm_file_name == 0)
2228 int len = strlen (dump_base_name);
2229 char *dumpname = (char *) xmalloc (len + 6);
2230 memcpy (dumpname, dump_base_name, len + 1);
2231 strip_off_ending (dumpname, len);
2232 strcat (dumpname, ".s");
2233 asm_file_name = dumpname;
2235 if (!strcmp (asm_file_name, "-"))
2236 asm_out_file = stdout;
2238 asm_out_file = fopen (asm_file_name, "w");
2239 if (asm_out_file == 0)
2240 pfatal_with_name (asm_file_name);
2243 #ifdef IO_BUFFER_SIZE
2244 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2245 _IOFBF, IO_BUFFER_SIZE);
2250 name = ggc_alloc_string (name, strlen (name));
2251 input_filename = name;
2253 /* Put an entry on the input file stack for the main input file. */
2255 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2256 input_file_stack->next = 0;
2257 input_file_stack->name = input_filename;
2259 /* Perform language-specific initialization.
2260 This may set main_input_filename. */
2263 /* If the input doesn't start with a #line, use the input name
2264 as the official input file name. */
2265 if (main_input_filename == 0)
2266 main_input_filename = name;
2268 if (flag_syntax_only)
2270 write_symbols = NO_DEBUG;
2272 profile_block_flag = 0;
2276 ASM_FILE_START (asm_out_file);
2278 #ifdef ASM_COMMENT_START
2279 if (flag_verbose_asm)
2281 /* Print the list of options in effect. */
2282 print_version (asm_out_file, ASM_COMMENT_START);
2283 print_switch_values (asm_out_file, 0, MAX_LINE,
2284 ASM_COMMENT_START, " ", "\n");
2285 /* Add a blank line here so it appears in assembler output but not
2287 fprintf (asm_out_file, "\n");
2291 /* Output something to inform GDB that this compilation was by GCC. */
2292 #ifndef ASM_IDENTIFY_GCC
2293 fprintf (asm_out_file, "gcc2_compiled.:\n");
2295 ASM_IDENTIFY_GCC (asm_out_file);
2298 /* Output something to identify which front-end produced this file. */
2299 #ifdef ASM_IDENTIFY_LANGUAGE
2300 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2302 } /* ! flag_syntax_only */
2304 #ifndef ASM_OUTPUT_SECTION_NAME
2305 if (flag_function_sections)
2307 warning ("-ffunction-sections not supported for this target.");
2308 flag_function_sections = 0;
2310 if (flag_data_sections)
2312 warning ("-fdata-sections not supported for this target.");
2313 flag_data_sections = 0;
2317 if (flag_function_sections
2318 && (profile_flag || profile_block_flag))
2320 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2321 flag_function_sections = 0;
2324 #ifndef OBJECT_FORMAT_ELF
2325 if (flag_function_sections && write_symbols != NO_DEBUG)
2326 warning ("-ffunction-sections may affect debugging on some targets.");
2329 /* ??? Note: There used to be a conditional here
2330 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2331 This was to guarantee separation between gcc_compiled. and
2332 the first function, for the sake of dbx on Suns.
2333 However, having the extra zero here confused the Emacs
2334 code for unexec, and might confuse other programs too.
2335 Therefore, I took out that change.
2336 In future versions we should find another way to solve
2337 that dbx problem. -- rms, 23 May 93. */
2339 /* Don't let the first function fall at the same address
2340 as gcc_compiled., if profiling. */
2341 if (profile_flag || profile_block_flag)
2343 /* It's best if we can write a nop here since some
2344 assemblers don't tolerate zeros in the text section. */
2345 output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
2348 /* If dbx symbol table desired, initialize writing it
2349 and output the predefined types. */
2350 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2351 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2352 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
2355 #ifdef SDB_DEBUGGING_INFO
2356 if (write_symbols == SDB_DEBUG)
2357 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
2360 #ifdef DWARF_DEBUGGING_INFO
2361 if (write_symbols == DWARF_DEBUG)
2362 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
2364 #ifdef DWARF2_UNWIND_INFO
2365 if (dwarf2out_do_frame ())
2366 dwarf2out_frame_init ();
2368 #ifdef DWARF2_DEBUGGING_INFO
2369 if (write_symbols == DWARF2_DEBUG)
2370 TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
2373 /* Initialize yet another pass. */
2375 init_final (main_input_filename);
2376 init_branch_prob (dump_base_name);
2378 start_time = get_run_time ();
2380 /* Call the parser, which parses the entire file
2381 (calling rest_of_compilation for each function). */
2383 if (yyparse () != 0)
2385 if (errorcount == 0)
2386 fnotice (stderr, "Errors detected in input file (your bison.simple is out of date)\n");
2388 /* In case there were missing closebraces,
2389 get us back to the global binding level. */
2390 while (! global_bindings_p ())
2394 /* Compilation is now finished except for writing
2395 what's left of the symbol table output. */
2397 parse_time += get_run_time () - start_time;
2399 parse_time -= integration_time;
2400 parse_time -= varconst_time;
2402 if (flag_syntax_only)
2405 globals = getdecls ();
2407 /* Really define vars that have had only a tentative definition.
2408 Really output inline functions that must actually be callable
2409 and have not been output so far. */
2412 int len = list_length (globals);
2413 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2417 /* Process the decls in reverse order--earliest first.
2418 Put them into VEC from back to front, then take out from front. */
2420 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2421 vec[len - i - 1] = decl;
2423 wrapup_global_declarations (vec, len);
2425 /* This must occur after the loop to output deferred functions. Else
2426 the profiler initializer would not be emitted if all the functions
2427 in this compilation unit were deferred.
2429 output_func_start_profiler can not cause any additional functions or
2430 data to need to be output, so it need not be in the deferred function
2432 output_func_start_profiler ();
2434 /* Now that all possible functions have been output, we can dump
2435 the exception table. */
2437 output_exception_table ();
2439 check_global_declarations (vec, len);
2445 /* Write out any pending weak symbol declarations. */
2449 /* Do dbx symbols */
2450 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2451 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2452 TIMEVAR (symout_time,
2454 dbxout_finish (asm_out_file, main_input_filename);
2458 #ifdef DWARF_DEBUGGING_INFO
2459 if (write_symbols == DWARF_DEBUG)
2460 TIMEVAR (symout_time,
2466 #ifdef DWARF2_UNWIND_INFO
2467 if (dwarf2out_do_frame ())
2468 dwarf2out_frame_finish ();
2471 #ifdef DWARF2_DEBUGGING_INFO
2472 if (write_symbols == DWARF2_DEBUG)
2473 TIMEVAR (symout_time,
2475 dwarf2out_finish ();
2479 /* Output some stuff at end of file if nec. */
2481 end_final (dump_base_name);
2483 if (branch_prob_dump)
2484 open_dump_file (".07.bp", NULL);
2486 TIMEVAR (dump_time, end_branch_prob (rtl_dump_file));
2488 if (branch_prob_dump)
2489 close_dump_file (NULL, NULL_RTX);
2492 ASM_FILE_END (asm_out_file);
2496 /* Language-specific end of compilation actions. */
2500 /* Close the dump files. */
2502 if (flag_gen_aux_info)
2504 fclose (aux_info_file);
2506 unlink (aux_info_file_name);
2511 open_dump_file (".09.combine", NULL);
2512 TIMEVAR (dump_time, dump_combine_total_stats (rtl_dump_file));
2513 close_dump_file (NULL, NULL_RTX);
2516 /* Close non-debugging input and output files. Take special care to note
2517 whether fclose returns an error, since the pages might still be on the
2518 buffer chain while the file is open. */
2522 if (! flag_syntax_only
2523 && (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0))
2524 fatal_io_error (asm_file_name);
2526 /* Do whatever is necessary to finish printing the graphs. */
2527 if (graph_dump_format != no_graph)
2530 finish_graph_dump_file (dump_base_name, ".01.jump");
2532 finish_graph_dump_file (dump_base_name, ".02.cse");
2534 finish_graph_dump_file (dump_base_name, ".03.addressof");
2536 finish_graph_dump_file (dump_base_name, ".04.gcse");
2538 finish_graph_dump_file (dump_base_name, ".05.loop");
2540 finish_graph_dump_file (dump_base_name, ".06.cse2");
2541 if (branch_prob_dump)
2542 finish_graph_dump_file (dump_base_name, ".07.bp");
2544 finish_graph_dump_file (dump_base_name, ".08.flow");
2546 finish_graph_dump_file (dump_base_name, ".09.combine");
2548 finish_graph_dump_file (dump_base_name, ".10.regmove");
2549 #ifdef INSN_SCHEDULING
2551 finish_graph_dump_file (dump_base_name, ".11.sched");
2554 finish_graph_dump_file (dump_base_name, ".12.lreg");
2555 if (global_reg_dump)
2556 finish_graph_dump_file (dump_base_name, ".13.greg");
2558 finish_graph_dump_file (dump_base_name, ".14.flow2");
2559 #ifdef HAVE_peephole2
2561 finish_graph_dump_file (dump_base_name, ".15.peephole2");
2563 #ifdef INSN_SCHEDULING
2565 finish_graph_dump_file (dump_base_name, ".16.sched2");
2568 finish_graph_dump_file (dump_base_name, ".17.jump2");
2569 #ifdef MACHINE_DEPENDENT_REORG
2570 if (mach_dep_reorg_dump)
2571 finish_graph_dump_file (dump_base_name, ".18.mach");
2575 finish_graph_dump_file (dump_base_name, ".19.dbr");
2579 finish_graph_dump_file (dump_base_name, ".20.stack");
2583 /* Free up memory for the benefit of leak detectors. */
2586 /* Print the times. */
2590 all_time = get_run_time ();
2592 fprintf (stderr,"\n");
2594 print_time ("parse", parse_time);
2595 print_time ("integration", integration_time);
2596 print_time ("jump", jump_time);
2597 print_time ("cse", cse_time);
2598 print_time ("gcse", gcse_time);
2599 print_time ("loop", loop_time);
2600 print_time ("cse2", cse2_time);
2601 print_time ("branch-prob", branch_prob_time);
2602 print_time ("flow", flow_time);
2603 print_time ("combine", combine_time);
2604 print_time ("regmove", regmove_time);
2605 #ifdef INSN_SCHEDULING
2606 print_time ("sched", sched_time);
2608 print_time ("local-alloc", local_alloc_time);
2609 print_time ("global-alloc", global_alloc_time);
2610 print_time ("flow2", flow2_time);
2611 #ifdef HAVE_peephole2
2612 print_time ("peephole2", peephole2_time);
2614 #ifdef INSN_SCHEDULING
2615 print_time ("sched2", sched2_time);
2618 print_time ("dbranch", dbr_sched_time);
2620 print_time ("shorten-branch", shorten_branch_time);
2622 print_time ("stack-reg", stack_reg_time);
2624 print_time ("final", final_time);
2625 print_time ("varconst", varconst_time);
2626 print_time ("symout", symout_time);
2627 print_time ("dump", dump_time);
2629 print_time ("gc", gc_time);
2633 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2634 and TYPE_DECL nodes.
2636 This does nothing for local (non-static) variables, unless the
2637 variable is a register variable with an ASMSPEC. In that case, or
2638 if the variable is not an automatice, it sets up the RTL and
2639 outputs any assembler code (label definition, storage allocation
2640 and initialization).
2642 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2643 the assembler symbol name to be used. TOP_LEVEL is nonzero
2644 if this declaration is not within a function. */
2647 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2649 const char *asmspec;
2653 /* Declarations of variables, and of functions defined elsewhere. */
2655 /* The most obvious approach, to put an #ifndef around where
2656 this macro is used, doesn't work since it's inside a macro call. */
2657 #ifndef ASM_FINISH_DECLARE_OBJECT
2658 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2661 /* Forward declarations for nested functions are not "external",
2662 but we need to treat them as if they were. */
2663 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2664 || TREE_CODE (decl) == FUNCTION_DECL)
2665 TIMEVAR (varconst_time,
2667 make_decl_rtl (decl, asmspec, top_level);
2668 /* Initialized extern variable exists to be replaced
2669 with its value, or represents something that will be
2670 output in another file. */
2671 if (! (TREE_CODE (decl) == VAR_DECL
2672 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2673 && DECL_INITIAL (decl) != 0
2674 && DECL_INITIAL (decl) != error_mark_node))
2675 /* Don't output anything
2676 when a tentative file-scope definition is seen.
2677 But at end of compilation, do output code for them. */
2678 if (! (! at_end && top_level
2679 && (DECL_INITIAL (decl) == 0
2680 || DECL_INITIAL (decl) == error_mark_node)))
2681 assemble_variable (decl, top_level, at_end, 0);
2682 if (decl == last_assemble_variable_decl)
2684 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2688 else if (DECL_REGISTER (decl) && asmspec != 0)
2690 if (decode_reg_name (asmspec) >= 0)
2692 DECL_RTL (decl) = 0;
2693 make_decl_rtl (decl, asmspec, top_level);
2696 error ("invalid register name `%s' for register variable", asmspec);
2698 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2699 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2700 && TREE_CODE (decl) == TYPE_DECL)
2701 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2703 #ifdef SDB_DEBUGGING_INFO
2704 else if (write_symbols == SDB_DEBUG && top_level
2705 && TREE_CODE (decl) == TYPE_DECL)
2706 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2710 /* Called after finishing a record, union or enumeral type. */
2713 rest_of_type_compilation (type, toplev)
2714 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2718 tree type ATTRIBUTE_UNUSED;
2719 int toplev ATTRIBUTE_UNUSED;
2722 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2723 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2724 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2726 #ifdef SDB_DEBUGGING_INFO
2727 if (write_symbols == SDB_DEBUG)
2728 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2732 /* This is called from finish_function (within yyparse)
2733 after each top-level definition is parsed.
2734 It is supposed to compile that function or variable
2735 and output the assembler code for it.
2736 After we return, the tree storage is freed. */
2739 rest_of_compilation (decl)
2743 int start_time = get_run_time ();
2746 int rebuild_label_notes_after_reload;
2748 /* First, remove any notes we don't need. That will make iterating
2749 over the instruction sequence faster, and allow the garbage
2750 collector to reclaim the memory used by the notes. */
2751 remove_unncessary_notes ();
2753 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2754 tree in sensible shape. So, we just recalculate it here. */
2755 if (cfun->x_whole_function_mode_p)
2757 find_loop_tree_blocks ();
2758 unroll_block_trees ();
2761 /* If we are reconsidering an inline function
2762 at the end of compilation, skip the stuff for making it inline. */
2764 if (DECL_SAVED_INSNS (decl) == 0)
2770 /* If this is nested inside an inlined external function, pretend
2771 it was only declared. Since we cannot inline such functions,
2772 generating code for this one is not only not necessary but will
2773 confuse some debugging output writers. */
2774 for (parent = DECL_CONTEXT (current_function_decl);
2775 parent != NULL_TREE;
2776 parent = get_containing_scope (parent))
2777 if (TREE_CODE (parent) == FUNCTION_DECL
2778 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2780 DECL_INITIAL (decl) = 0;
2781 goto exit_rest_of_compilation;
2784 /* If requested, consider whether to make this function inline. */
2785 if (DECL_INLINE (decl) || flag_inline_functions)
2786 TIMEVAR (integration_time,
2788 lose = function_cannot_inline_p (decl);
2789 if (lose || ! optimize)
2791 if (warn_inline && DECL_INLINE (decl))
2792 warning_with_decl (decl, lose);
2793 DECL_ABSTRACT_ORIGIN (decl) = 0;
2794 /* Don't really compile an extern inline function.
2795 If we can't make it inline, pretend
2796 it was only declared. */
2797 if (DECL_EXTERNAL (decl))
2799 DECL_INITIAL (decl) = 0;
2800 goto exit_rest_of_compilation;
2804 /* ??? Note that this has the effect of making it look
2805 like "inline" was specified for a function if we choose
2806 to inline it. This isn't quite right, but it's
2807 probably not worth the trouble to fix. */
2808 inlinable = DECL_INLINE (decl) = 1;
2811 insns = get_insns ();
2813 /* Dump the rtl code if we are dumping rtl. */
2817 open_dump_file (".00.rtl", decl_printable_name (decl, 2));
2819 if (DECL_SAVED_INSNS (decl))
2820 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2822 close_dump_file (print_rtl, insns);
2825 /* If function is inline, and we don't yet know whether to
2826 compile it by itself, defer decision till end of compilation.
2827 finish_compilation will call rest_of_compilation again
2828 for those functions that need to be output. Also defer those
2829 functions that we are supposed to defer. */
2832 DECL_DEFER_OUTPUT (decl) = 1;
2834 if (DECL_DEFER_OUTPUT (decl)
2835 || (DECL_INLINE (decl)
2836 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2837 && ! flag_keep_inline_functions)
2838 || DECL_EXTERNAL (decl))))
2840 DECL_DEFER_OUTPUT (decl) = 1;
2842 /* If -Wreturn-type, we have to do a bit of compilation.
2843 However, if we just fall through we will call
2844 save_for_inline_copying() which results in excessive
2845 memory use. Instead, we just want to call
2846 jump_optimize() to figure out whether or not we can fall
2847 off the end of the function; we do the minimum amount of
2848 work necessary to make that safe. And, we set optimize
2849 to zero to keep jump_optimize from working too hard. */
2850 if (warn_return_type)
2852 int saved_optimize = optimize;
2854 find_exception_handler_labels ();
2855 jump_optimize (get_insns(), !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2856 !JUMP_AFTER_REGSCAN);
2857 optimize = saved_optimize;
2860 #ifdef DWARF_DEBUGGING_INFO
2861 /* Generate the DWARF info for the "abstract" instance
2862 of a function which we may later generate inlined and/or
2863 out-of-line instances of. */
2864 if (write_symbols == DWARF_DEBUG)
2866 set_decl_abstract_flags (decl, 1);
2867 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
2868 set_decl_abstract_flags (decl, 0);
2871 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2872 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2873 goto exit_rest_of_compilation;
2876 /* If specified extern inline but we aren't inlining it, we are
2877 done. This goes for anything that gets here with DECL_EXTERNAL
2878 set, not just things with DECL_INLINE. */
2879 if (DECL_EXTERNAL (decl))
2880 goto exit_rest_of_compilation;
2883 /* Initialize some variables used by the optimizers. */
2884 init_function_for_compilation ();
2886 if (! DECL_DEFER_OUTPUT (decl))
2887 TREE_ASM_WRITTEN (decl) = 1;
2889 /* Now that integrate will no longer see our rtl, we need not distinguish
2890 between the return value of this function and the return value of called
2892 rtx_equal_function_value_matters = 0;
2894 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2895 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2897 goto exit_rest_of_compilation;
2900 /* Emit code to get eh context, if needed. */
2904 /* If we are doing position-independent code generation, now
2905 is the time to output special prologues and epilogues.
2906 We do not want to do this earlier, because it just clutters
2907 up inline functions with meaningless insns. */
2912 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2913 Note that that may have been done above, in save_for_inline_copying.
2914 The call to resume_temporary_allocation near the end of this function
2915 goes back to the usual state of affairs. This must be done after
2916 we've built up any unwinders for exception handling, and done
2917 the FINALIZE_PIC work, if necessary. */
2919 rtl_in_current_obstack ();
2921 insns = get_insns ();
2923 /* Copy any shared structure that should not be shared. */
2925 unshare_all_rtl (insns);
2927 init_EXPR_INSN_LIST_cache ();
2929 #ifdef SETJMP_VIA_SAVE_AREA
2930 /* This must be performed before virutal register instantiation. */
2931 if (current_function_calls_alloca)
2932 optimize_save_area_alloca (insns);
2935 /* Instantiate all virtual registers. */
2937 instantiate_virtual_regs (current_function_decl, get_insns ());
2939 /* See if we have allocated stack slots that are not directly addressable.
2940 If so, scan all the insns and create explicit address computation
2941 for all references to such slots. */
2942 /* fixup_stack_slots (); */
2944 /* Find all the EH handlers. */
2945 find_exception_handler_labels ();
2948 open_dump_file (".01.jump", decl_printable_name (decl, 2));
2950 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2951 are initialized and to compute whether control can drop off the end
2953 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
2954 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2955 JUMP_AFTER_REGSCAN));
2957 /* Jump optimization, and the removal of NULL pointer checks, may
2958 have reduced the number of instructions substantially. CSE, and
2959 future passes, allocate arrays whose dimensions involve the maximum
2960 instruction UID, so if we can reduce the maximum UID we'll save big on
2962 renumber_insns (rtl_dump_file);
2964 /* Dump rtl code after jump, if we are doing that. */
2966 close_dump_file (print_rtl, insns);
2968 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
2969 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
2970 goto exit_rest_of_compilation;
2972 /* Try to identify useless null pointer tests and delete them. */
2973 if (flag_delete_null_pointer_checks)
2974 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
2979 /* Perform common subexpression elimination.
2980 Nonzero value from `cse_main' means that jumps were simplified
2981 and some code may now be unreachable, so do
2982 jump optimization again. */
2987 open_dump_file (".02.cse", decl_printable_name (decl, 2));
2989 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
2991 if (flag_thread_jumps)
2992 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
2994 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
2996 /* If we are not running the second CSE pass, then we are no longer
2997 expecting CSE to be run. */
2998 cse_not_expected = !flag_rerun_cse_after_loop;
3000 if (tem || optimize > 1)
3001 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3003 !JUMP_AFTER_REGSCAN));
3005 /* Run this after jump optmizations remove all the unreachable code
3006 so that unreachable code will not keep values live. */
3007 TIMEVAR (cse_time, delete_trivially_dead_insns (insns, max_reg_num ()));
3009 /* Try to identify useless null pointer tests and delete them. */
3010 if (flag_delete_null_pointer_checks)
3011 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3013 /* The second pass of jump optimization is likely to have
3014 removed a bunch more instructions. */
3015 renumber_insns (rtl_dump_file);
3017 /* Dump rtl code after cse, if we are doing that. */
3020 close_dump_file (print_rtl, insns);
3021 if (graph_dump_format != no_graph)
3022 print_rtl_graph_with_bb (dump_base_name, ".02.cse", insns);
3026 purge_addressof (insns);
3027 reg_scan (insns, max_reg_num (), 1);
3031 dump_rtl (".03.addressof", decl, print_rtl, insns);
3032 if (graph_dump_format != no_graph)
3033 print_rtl_graph_with_bb (dump_base_name, ".03.addressof", insns);
3039 /* Perform global cse. */
3041 if (optimize > 0 && flag_gcse)
3044 open_dump_file (".04.gcse", decl_printable_name (decl, 2));
3046 TIMEVAR (gcse_time, tem = gcse_main (insns, rtl_dump_file));
3048 /* If gcse altered any jumps, rerun jump optimizations to clean
3052 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3054 !JUMP_AFTER_REGSCAN));
3059 close_dump_file (print_rtl, insns);
3060 if (graph_dump_format != no_graph)
3061 print_rtl_graph_with_bb (dump_base_name, ".04.gcse", insns);
3067 /* Move constant computations out of loops. */
3072 open_dump_file (".05.loop", decl_printable_name (decl, 2));
3077 if (flag_rerun_loop_opt)
3079 /* We only want to perform unrolling once. */
3081 loop_optimize (insns, rtl_dump_file, 0, 0);
3084 /* The first call to loop_optimize makes some instructions
3085 trivially dead. We delete those instructions now in the
3086 hope that doing so will make the heuristics in loop work
3087 better and possibly speed up compilation. */
3088 delete_trivially_dead_insns (insns, max_reg_num ());
3090 /* The regscan pass is currently necessary as the alias
3091 analysis code depends on this information. */
3092 reg_scan (insns, max_reg_num (), 1);
3094 loop_optimize (insns, rtl_dump_file, flag_unroll_loops, 1);
3097 /* Dump rtl code after loop opt, if we are doing that. */
3101 close_dump_file (print_rtl, insns);
3102 if (graph_dump_format != no_graph)
3103 print_rtl_graph_with_bb (dump_base_name, ".05.loop", insns);
3110 /* ??? Well, nearly. If HAVE_conditional_arithmetic, jump_optimize
3111 has put off all if-conversion until "after CSE". If we put this
3112 off any longer we may miss out doing if-conversion entirely. */
3113 cse_not_expected = 1;
3118 open_dump_file (".06.cse2", decl_printable_name (decl, 2));
3120 if (flag_rerun_cse_after_loop)
3122 /* Running another jump optimization pass before the second
3123 cse pass sometimes simplifies the RTL enough to allow
3124 the second CSE pass to do a better job. Jump_optimize can change
3125 max_reg_num so we must rerun reg_scan afterwards.
3126 ??? Rework to not call reg_scan so often. */
3127 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3128 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3130 JUMP_AFTER_REGSCAN));
3132 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3133 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3136 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3138 !JUMP_AFTER_REGSCAN));
3141 if (flag_thread_jumps)
3143 /* This pass of jump threading straightens out code
3144 that was kinked by loop optimization. */
3145 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3146 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3149 /* Dump rtl code after cse, if we are doing that. */
3152 close_dump_file (print_rtl, insns);
3153 if (graph_dump_format != no_graph)
3154 print_rtl_graph_with_bb (dump_base_name, ".06.cse2", insns);
3161 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3163 if (branch_prob_dump)
3164 open_dump_file (".07.bp", decl_printable_name (decl, 2));
3169 branch_prob (insns, rtl_dump_file);
3172 if (branch_prob_dump)
3174 close_dump_file (print_rtl, insns);
3175 if (graph_dump_format != no_graph)
3176 print_rtl_graph_with_bb (dump_base_name, ".07.bp", insns);
3183 /* Now we choose between stupid (pcc-like) register allocation
3184 (if we got the -noreg switch and not -opt)
3185 and smart register allocation. */
3187 if (optimize > 0) /* Stupid allocation probably won't work */
3188 obey_regdecls = 0; /* if optimizations being done. */
3192 /* Print function header into flow dump now
3193 because doing the flow analysis makes some of the dump. */
3196 open_dump_file (".08.flow", decl_printable_name (decl, 2));
3202 regclass (insns, max_reg_num (), NULL);
3203 stupid_life_analysis (insns, max_reg_num (),
3209 /* Do control and data flow analysis,
3210 and write some of the results to dump file. */
3215 find_basic_blocks (insns, max_reg_num (), rtl_dump_file, 1);
3216 calculate_loop_depth (rtl_dump_file);
3217 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3220 if (warn_uninitialized || extra_warnings)
3222 uninitialized_vars_warning (DECL_INITIAL (decl));
3224 setjmp_args_warning ();
3228 /* Dump rtl after flow analysis. */
3232 close_dump_file (print_rtl_with_bb, insns);
3233 if (graph_dump_format != no_graph)
3234 print_rtl_graph_with_bb (dump_base_name, ".08.flow", insns);
3240 /* The first life analysis pass has finished. From now on we can not
3241 generate any new pseudos. */
3244 /* If -opt, try combining insns through substitution. */
3248 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
3250 /* Dump rtl code after insn combination. */
3254 dump_rtl (".09.combine", decl, print_rtl_with_bb, insns);
3255 if (graph_dump_format != no_graph)
3256 print_rtl_graph_with_bb (dump_base_name, ".09.combine", insns);
3263 /* Register allocation pre-pass, to reduce number of moves
3264 necessary for two-address machines. */
3265 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3268 open_dump_file (".10.regmove", decl_printable_name (decl, 2));
3270 TIMEVAR (regmove_time, regmove_optimize (insns, max_reg_num (),
3275 close_dump_file (print_rtl_with_bb, insns);
3276 if (graph_dump_format != no_graph)
3277 print_rtl_graph_with_bb (dump_base_name, ".10.regmove", insns);
3284 /* Print function header into sched dump now
3285 because doing the sched analysis makes some of the dump. */
3287 #ifdef INSN_SCHEDULING
3288 if (optimize > 0 && flag_schedule_insns)
3291 open_dump_file (".11.sched", decl_printable_name (decl, 2));
3293 /* Do control and data sched analysis,
3294 and write some of the results to dump file. */
3296 TIMEVAR (sched_time, schedule_insns (rtl_dump_file));
3298 /* Dump rtl after instruction scheduling. */
3302 close_dump_file (print_rtl_with_bb, insns);
3303 if (graph_dump_format != no_graph)
3304 print_rtl_graph_with_bb (dump_base_name, ".11.sched", insns);
3312 /* Determine if the current function is a leaf before running reload
3313 since this can impact optimizations done by the prologue and
3314 epilogue thus changing register elimination offsets. */
3315 current_function_is_leaf = leaf_function_p ();
3318 open_dump_file (".12.lreg", decl_printable_name (decl, 2));
3320 /* Unless we did stupid register allocation,
3321 allocate pseudo-regs that are used only within 1 basic block.
3323 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3324 jump optimizer after register allocation and reloading are finished. */
3327 TIMEVAR (local_alloc_time,
3329 /* We recomputed reg usage as part of updating the rest
3330 of life info during sched. */
3331 if (! flag_schedule_insns)
3332 recompute_reg_usage (insns, ! optimize_size);
3333 regclass (insns, max_reg_num (), rtl_dump_file);
3334 rebuild_label_notes_after_reload = local_alloc ();
3337 rebuild_label_notes_after_reload = 0;
3339 /* Dump rtl code after allocating regs within basic blocks. */
3343 TIMEVAR (dump_time, dump_flow_info (rtl_dump_file));
3344 TIMEVAR (dump_time, dump_local_alloc (rtl_dump_file));
3346 close_dump_file (print_rtl_with_bb, insns);
3347 if (graph_dump_format != no_graph)
3348 print_rtl_graph_with_bb (dump_base_name, ".12.lreg", insns);
3354 if (global_reg_dump)
3355 open_dump_file (".13.greg", decl_printable_name (decl, 2));
3357 /* Unless we did stupid register allocation,
3358 allocate remaining pseudo-regs, then do the reload pass
3359 fixing up any insns that are invalid. */
3361 TIMEVAR (global_alloc_time,
3364 failure = global_alloc (rtl_dump_file);
3366 failure = reload (insns, 0, rtl_dump_file);
3371 goto exit_rest_of_compilation;
3376 /* Do a very simple CSE pass over just the hard registers. */
3378 reload_cse_regs (insns);
3380 /* Register allocation and reloading may have turned an indirect jump into
3381 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3382 jumping instructions. */
3383 if (rebuild_label_notes_after_reload)
3384 TIMEVAR (jump_time, rebuild_jump_labels (insns));
3386 /* On some machines, the prologue and epilogue code, or parts thereof,
3387 can be represented as RTL. Doing so lets us schedule insns between
3388 it and the rest of the code and also allows delayed branch
3389 scheduling to operate in the epilogue. */
3391 thread_prologue_and_epilogue_insns (insns);
3393 /* If optimizing and we are performing instruction scheduling after
3394 reload, then go ahead and split insns now since we are about to
3395 recompute flow information anyway.
3397 reload_cse_regs may expose more splitting opportunities, expecially
3398 for double-word operations. */
3399 if (optimize > 0 && flag_schedule_insns_after_reload)
3400 split_all_insns (0);
3402 if (global_reg_dump)
3404 TIMEVAR (dump_time, dump_global_regs (rtl_dump_file));
3405 close_dump_file (print_rtl_with_bb, insns);
3406 if (graph_dump_format != no_graph)
3407 print_rtl_graph_with_bb (dump_base_name, ".13.greg", insns);
3410 /* Re-create the death notes which were deleted during reload. */
3412 open_dump_file (".14.flow2", decl_printable_name (decl, 2));
3419 find_basic_blocks (insns, max_reg_num (), rtl_dump_file, 1);
3420 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3427 flow2_completed = 1;
3431 close_dump_file (print_rtl_with_bb, insns);
3432 if (graph_dump_format != no_graph)
3433 print_rtl_graph_with_bb (dump_base_name, ".14.flow2", insns);
3436 #ifdef HAVE_peephole2
3437 if (optimize > 0 && flag_peephole2)
3440 open_dump_file (".15.peephole2", decl_printable_name (decl, 2));
3442 TIMEVAR (peephole2_time, peephole2_optimize (rtl_dump_file));
3446 close_dump_file (print_rtl_with_bb, insns);
3447 if (graph_dump_format != no_graph)
3448 print_rtl_graph_with_bb (dump_base_name, ".15.peephole2", insns);
3453 #ifdef INSN_SCHEDULING
3454 if (optimize > 0 && flag_schedule_insns_after_reload)
3457 open_dump_file (".16.sched2", decl_printable_name (decl, 2));
3459 /* Do control and data sched analysis again,
3460 and write some more of the results to dump file. */
3462 TIMEVAR (sched2_time, schedule_insns (rtl_dump_file));
3464 /* Dump rtl after post-reorder instruction scheduling. */
3468 close_dump_file (print_rtl_with_bb, insns);
3469 if (graph_dump_format != no_graph)
3470 print_rtl_graph_with_bb (dump_base_name, ".16.sched2", insns);
3478 #ifdef LEAF_REGISTERS
3479 current_function_uses_only_leaf_regs
3480 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3483 /* One more attempt to remove jumps to .+1
3484 left by dead-store-elimination.
3485 Also do cross-jumping this time
3486 and delete no-op move insns. */
3490 TIMEVAR (jump_time, jump_optimize (insns, JUMP_CROSS_JUMP,
3492 !JUMP_AFTER_REGSCAN));
3494 /* Dump rtl code after jump, if we are doing that. */
3498 dump_rtl (".17.jump2", decl, print_rtl_with_bb, insns);
3499 if (graph_dump_format != no_graph)
3500 print_rtl_graph_with_bb (dump_base_name, ".17.jump2", insns);
3504 /* If a machine dependent reorganization is needed, call it. */
3505 #ifdef MACHINE_DEPENDENT_REORG
3506 if (mach_dep_reorg_dump)
3507 open_dump_file (".18.mach", decl_printable_name (decl, 2));
3509 MACHINE_DEPENDENT_REORG (insns);
3511 if (mach_dep_reorg_dump)
3513 close_dump_file (print_rtl_with_bb, insns);
3514 if (graph_dump_format != no_graph)
3515 print_rtl_graph_with_bb (dump_base_name, ".18.mach", insns);
3522 /* If a scheduling pass for delayed branches is to be done,
3523 call the scheduling code. */
3526 if (optimize > 0 && flag_delayed_branch)
3529 open_dump_file (".19.dbr", decl_printable_name (decl, 2));
3534 dbr_schedule (insns, rtl_dump_file);
3539 close_dump_file (print_rtl_with_bb, insns);
3540 if (graph_dump_format != no_graph)
3541 print_rtl_graph_with_bb (dump_base_name, ".19.dbr", insns);
3551 open_dump_file (".20.stack", decl_printable_name (decl, 2));
3553 TIMEVAR (stack_reg_time, reg_to_stack (insns, rtl_dump_file));
3557 close_dump_file (print_rtl_with_bb, insns);
3558 if (graph_dump_format != no_graph)
3559 print_rtl_graph_with_bb (dump_base_name, ".20.stack", insns);
3566 /* Shorten branches. */
3567 TIMEVAR (shorten_branch_time,
3569 shorten_branches (get_insns ());
3572 /* Now turn the rtl into assembler code. */
3574 TIMEVAR (final_time,
3579 /* Get the function's name, as described by its RTL.
3580 This may be different from the DECL_NAME name used
3581 in the source file. */
3583 x = DECL_RTL (decl);
3584 if (GET_CODE (x) != MEM)
3587 if (GET_CODE (x) != SYMBOL_REF)
3589 fnname = XSTR (x, 0);
3591 assemble_start_function (decl, fnname);
3592 final_start_function (insns, asm_out_file, optimize);
3593 final (insns, asm_out_file, optimize, 0);
3594 final_end_function (insns, asm_out_file, optimize);
3595 assemble_end_function (decl, fnname);
3597 fflush (asm_out_file);
3599 /* Release all memory allocated by flow. */
3600 free_basic_block_vars (0);
3602 /* Release all memory held by regsets now */
3603 regset_release_memory ();
3609 /* Write DBX symbols if requested */
3611 /* Note that for those inline functions where we don't initially
3612 know for certain that we will be generating an out-of-line copy,
3613 the first invocation of this routine (rest_of_compilation) will
3614 skip over this code by doing a `goto exit_rest_of_compilation;'.
3615 Later on, finish_compilation will call rest_of_compilation again
3616 for those inline functions that need to have out-of-line copies
3617 generated. During that call, we *will* be routed past here. */
3619 #ifdef DBX_DEBUGGING_INFO
3620 if (write_symbols == DBX_DEBUG)
3621 TIMEVAR (symout_time, dbxout_function (decl));
3624 #ifdef DWARF_DEBUGGING_INFO
3625 if (write_symbols == DWARF_DEBUG)
3626 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3629 #ifdef DWARF2_DEBUGGING_INFO
3630 if (write_symbols == DWARF2_DEBUG)
3631 TIMEVAR (symout_time, dwarf2out_decl (decl));
3634 exit_rest_of_compilation:
3636 /* In case the function was not output,
3637 don't leave any temporary anonymous types
3638 queued up for sdb output. */
3639 #ifdef SDB_DEBUGGING_INFO
3640 if (write_symbols == SDB_DEBUG)
3641 sdbout_types (NULL_TREE);
3644 reload_completed = 0;
3645 flow2_completed = 0;
3648 TIMEVAR (final_time,
3650 /* Clear out the insn_length contents now that they are no
3652 init_insn_lengths ();
3654 /* Clear out the real_constant_chain before some of the rtx's
3655 it runs through become garbage. */
3656 clear_const_double_mem ();
3658 /* Cancel the effect of rtl_in_current_obstack. */
3659 resume_temporary_allocation ();
3661 /* Show no temporary slots allocated. */
3664 free_basic_block_vars (0);
3667 /* Make sure volatile mem refs aren't considered valid operands for
3668 arithmetic insns. We must call this here if this is a nested inline
3669 function, since the above code leaves us in the init_recog state
3670 (from final.c), and the function context push/pop code does not
3671 save/restore volatile_ok.
3673 ??? Maybe it isn't necessary for expand_start_function to call this
3674 anymore if we do it here? */
3676 init_recog_no_volatile ();
3678 /* We're done with this function. Free up memory if we can. */
3679 free_after_parsing (cfun);
3680 if (! DECL_DEFER_OUTPUT (decl))
3681 free_after_compilation (cfun);
3687 /* The parsing time is all the time spent in yyparse
3688 *except* what is spent in this function. */
3690 parse_time -= get_run_time () - start_time;
3701 printf ("Usage: %s input [switches]\n", progname);
3702 printf ("Switches:\n");
3704 printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
3705 printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
3706 printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
3707 printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
3709 for (i = NUM_ELEM (f_options); i--;)
3711 const char * description = f_options[i].description;
3713 if (description != NULL && * description != 0)
3714 printf (" -f%-21s %s\n",
3715 f_options[i].string, description);
3718 printf (" -O[number] Set optimisation level to [number]\n");
3719 printf (" -Os Optimise for space rather than speed\n");
3720 printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
3721 printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
3722 printf (" -w Suppress warnings\n");
3723 printf (" -W Enable extra warnings\n");
3725 for (i = NUM_ELEM (W_options); i--;)
3727 const char * description = W_options[i].description;
3729 if (description != NULL && * description != 0)
3730 printf (" -W%-21s %s\n",
3731 W_options[i].string, description);
3734 printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
3735 printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
3736 printf (" -p Enable function profiling\n");
3737 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3738 printf (" -a Enable block profiling \n");
3740 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3741 printf (" -ax Enable jump profiling \n");
3743 printf (" -o <file> Place output into <file> \n");
3744 printf (" -G <number> Put global and static data smaller than <number>\n");
3745 printf (" bytes into a special section (on some targets)\n");
3747 for (i = NUM_ELEM (debug_args); i--;)
3749 if (debug_args[i].description != NULL)
3750 printf (" -g%-21s %s\n", debug_args[i].arg, debug_args[i].description);
3753 printf (" -aux-info <file> Emit declaration info into <file>.X\n");
3754 printf (" -quiet Do not display functions compiled or elapsed time\n");
3755 printf (" -version Display the compiler's version\n");
3756 printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
3757 printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
3758 #if defined INSN_SCHEDULING
3759 printf (" -sched-verbose=<number> Set the verbosity level of the scheduler\n");
3761 printf (" --help Display this information\n");
3766 /* Display descriptions of language specific options.
3767 If there is no description, note that there is an undocumented option.
3768 If the description is empty, do not display anything. (This allows
3769 options to be deliberately undocumented, for whatever reason).
3770 If the option string is missing, then this is a marker, indicating
3771 that the description string is in fact the name of a language, whose
3772 language specific options are to follow. */
3774 if (NUM_ELEM (documented_lang_options) > 1)
3776 printf ("\nLanguage specific options:\n");
3778 for (i = 0; i < NUM_ELEM (documented_lang_options); i++)
3780 const char * description = documented_lang_options[i].description;
3781 const char * option = documented_lang_options[i].option;
3783 if (description == NULL)
3788 printf (" %-23.23s [undocumented]\n", option);
3790 else if (* description == 0)
3792 else if (option == NULL)
3796 ("\nThere are undocumented %s specific options as well.\n",
3800 printf ("\n Options for %s:\n", description);
3805 printf (" %-23.23s %s\n", option, description);
3810 printf ("\nThere are undocumented %s specific options as well.\n", lang);
3812 if (NUM_ELEM (target_switches) > 1
3813 #ifdef TARGET_OPTIONS
3814 || NUM_ELEM (target_options) > 1
3822 printf ("\nTarget specific options:\n");
3824 for (i = NUM_ELEM (target_switches); i--;)
3826 const char * option = target_switches[i].name;
3827 const char * description = target_switches[i].description;
3829 if (option == NULL || * option == 0)
3831 else if (description == NULL)
3836 printf (" -m%-21.21s [undocumented]\n", option);
3838 else if (* description != 0)
3839 doc += printf (" -m%-21.21s %s\n", option, description);
3842 #ifdef TARGET_OPTIONS
3843 for (i = NUM_ELEM (target_options); i--;)
3845 const char * option = target_options[i].prefix;
3846 const char * description = target_options[i].description;
3848 if (option == NULL || * option == 0)
3850 else if (description == NULL)
3855 printf (" -m%-21.21s [undocumented]\n", option);
3857 else if (* description != 0)
3858 doc += printf (" -m%-21.21s %s\n", option, description);
3864 printf ("\nThere are undocumented target specific options as well.\n");
3866 printf (" They exist, but they are not documented.\n");
3871 /* Parse a -d... comand line switch. */
3874 decode_d_option (arg)
3881 branch_prob_dump = 1;
3888 global_reg_dump = 1;
3904 #ifdef MACHINE_DEPENDENT_REORG
3905 mach_dep_reorg_dump = 1;
3913 branch_prob_dump = 1;
3930 global_reg_dump = 1;
3955 #ifdef MACHINE_DEPENDENT_REORG
3957 mach_dep_reorg_dump = 1;
3961 flag_print_asm_name = 1;
3982 graph_dump_format = vcg;
3988 rtl_dump_and_exit = 1;
3996 case 'D': /* These are handled by the preprocessor. */
4000 warning ("unrecognised gcc debugging option: %c", arg[-1]);
4005 /* Parse a -f... comand line switch. ARG is the value after the -f.
4006 It is safe to access 'ARG - 2' to generate the full switch name.
4007 Return the number of strings consumed. */
4010 decode_f_option (arg)
4015 /* Search for the option in the table of binary f options. */
4016 for (j = sizeof (f_options) / sizeof (f_options[0]); j--;)
4018 if (!strcmp (arg, f_options[j].string))
4020 *f_options[j].variable = f_options[j].on_value;
4024 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4025 && ! strcmp (arg + 3, f_options[j].string))
4027 *f_options[j].variable = ! f_options[j].on_value;
4032 if (!strncmp (arg, "inline-limit-", 13)
4033 || !strncmp (arg, "inline-limit=", 13))
4035 read_integral_parameter (arg + 13, arg - 2, inline_max_insns);
4036 #ifdef INSN_SCHEDULING
4037 else if (!strncmp (arg, "sched-verbose=", 14))
4038 fix_sched_param ("verbose", (const char *)(arg + 14));
4040 else if (!strncmp (arg, "fixed-", 6))
4041 fix_register ((const char *)(arg + 6), 1, 1);
4042 else if (!strncmp (arg, "call-used-", 10))
4043 fix_register ((const char *)(arg + 10), 0, 1);
4044 else if (!strncmp (arg, "call-saved-", 11))
4045 fix_register ((const char *)(arg + 11), 0, 0);
4046 else if (!strncmp (arg, "align-loops=", 12))
4047 align_loops = read_integral_parameter (arg + 12, arg - 2, align_loops);
4048 else if (!strncmp (arg, "align-functions=", 16))
4050 read_integral_parameter (arg + 16, arg - 2, align_functions);
4051 else if (!strncmp (arg, "align-jumps=", 12))
4052 align_jumps = read_integral_parameter (arg + 12, arg - 2, align_jumps);
4053 else if (!strncmp (arg, "align-labels=", 13))
4054 align_labels = read_integral_parameter (arg + 13, arg - 2, align_labels);
4055 else if (!strncmp (arg, "stack-limit-register=", 21))
4057 int reg = decode_reg_name (arg + 21);
4059 error ("unrecognized register name `%s'", arg + 21);
4061 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
4063 else if (!strncmp (arg, "stack-limit-symbol=", 19))
4067 nm = ggc_alloc_string (arg + 19, strlen (arg + 19));
4069 nm = xstrdup (arg + 19);
4070 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
4072 else if (!strcmp (arg, "no-stack-limit"))
4073 stack_limit_rtx = NULL_RTX;
4074 else if (!strcmp (arg, "preprocessed"))
4075 /* Recognise this switch but do nothing. This prevents warnings
4076 about an unrecognised switch if cpplib has not been linked in. */
4084 /* Parse a -W... comand line switch. ARG is the value after the -W.
4085 It is safe to access 'ARG - 2' to generate the full switch name.
4086 Return the number of strings consumed. */
4088 decode_W_option (arg)
4093 /* Search for the option in the table of binary W options. */
4095 for (j = sizeof (W_options) / sizeof (W_options[0]); j--;)
4097 if (!strcmp (arg, W_options[j].string))
4099 *W_options[j].variable = W_options[j].on_value;
4103 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4104 && ! strcmp (arg + 3, W_options[j].string))
4106 *W_options[j].variable = ! W_options[j].on_value;
4111 if (!strncmp (arg, "id-clash-", 9))
4113 const int id_clash_val = read_integral_parameter (arg + 9, arg - 2, -1);
4115 if (id_clash_val != -1)
4117 id_clash_len = id_clash_val;
4121 else if (!strncmp (arg, "larger-than-", 12))
4123 const int larger_than_val =
4124 read_integral_parameter (arg + 12, arg - 2, -1);
4125 if (larger_than_val != -1)
4127 larger_than_size = larger_than_val;
4128 warn_larger_than = 1;
4137 /* Parse a -g... comand line switch. ARG is the value after the -g.
4138 It is safe to access 'ARG - 2' to generate the full switch name.
4139 Return the number of strings consumed. */
4142 decode_g_option (arg)
4146 /* A lot of code assumes write_symbols == NO_DEBUG if the
4147 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4148 of what debugging type has been selected). This records the
4149 selected type. It is an error to specify more than one
4151 static enum debug_info_type selected_debug_type = NO_DEBUG;
4152 /* Non-zero if debugging format has been explicitly set.
4153 -g and -ggdb don't explicitly set the debugging format so
4154 -gdwarf -g3 is equivalent to -gdwarf3. */
4155 static int type_explicitly_set_p = 0;
4156 /* Indexed by enum debug_info_type. */
4157 static const char * debug_type_names[] =
4159 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4162 /* The maximum admissible debug level value. */
4163 static const unsigned max_debug_level = 3;
4165 /* Look up ARG in the table. */
4166 for (da = debug_args; da->arg; da++)
4168 const int da_len = strlen (da->arg);
4170 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4172 enum debug_info_type type = da->debug_type;
4173 const char * p = arg + da_len;
4175 if (*p && (*p < '0' || *p > '9'))
4178 /* A debug flag without a level defaults to level 2.
4179 Note we do not want to call read_integral_parameter
4180 for that case since it will call atoi which
4183 ??? We may want to generalize the interface to
4184 read_integral_parameter to better handle this case
4185 if this case shows up often. */
4187 level = read_integral_parameter (p, 0, max_debug_level + 1);
4191 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
4193 error ("use -gdwarf -g%d for DWARF v1, level %d",
4196 error ("use -gdwarf-2 for DWARF v2");
4199 if (level > max_debug_level)
4202 ignoring option `%s' due to invalid debug level specification",
4204 level = debug_info_level;
4207 if (type == NO_DEBUG)
4209 type = PREFERRED_DEBUGGING_TYPE;
4211 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
4213 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4214 type = DWARF2_DEBUG;
4216 #ifdef DBX_DEBUGGING_INFO
4223 if (type == NO_DEBUG)
4224 warning ("`%s': unknown or unsupported -g option", arg - 2);
4226 /* Does it conflict with an already selected type? */
4227 if (type_explicitly_set_p
4228 /* -g/-ggdb don't conflict with anything */
4229 && da->debug_type != NO_DEBUG
4230 && type != selected_debug_type)
4231 warning ("`%s' ignored, conflicts with `-g%s'",
4232 arg - 2, debug_type_names[(int) selected_debug_type]);
4235 /* If the format has already been set, -g/-ggdb
4236 only change the debug level. */
4237 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4238 ; /* don't change debugging type */
4241 selected_debug_type = type;
4242 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4245 write_symbols = (level == 0
4247 : selected_debug_type);
4248 use_gnu_debug_info_extensions = da->use_extensions_p;
4249 debug_info_level = (enum debug_info_level) level;
4257 warning ("`%s': unknown or unsupported -g option", arg - 2);
4262 /* Decode the first argument in the argv as a language-independent option.
4263 Return the number of strings consumed. 'strings_processed' is the
4264 number of strings that have already been decoded in a language
4265 specific fashion before this function was invoked. */
4268 independent_decode_option (argc, argv, strings_processed)
4271 unsigned strings_processed ATTRIBUTE_UNUSED;
4273 char * arg = argv[0];
4275 if (arg[0] != '-' || arg[1] == 0)
4287 if (!strcmp (arg, "-help"))
4302 /* Already been treated in main (). Do nothing. */
4306 set_target_switch (arg + 1);
4310 return decode_f_option (arg + 1);
4313 return decode_g_option (arg + 1);
4316 if (!strcmp (arg, "dumpbase"))
4321 dump_base_name = argv[1];
4325 decode_d_option (arg + 1);
4329 if (!strcmp (arg, "pedantic"))
4331 else if (!strcmp (arg, "pedantic-errors"))
4332 flag_pedantic_errors = pedantic = 1;
4333 else if (arg[1] == 0)
4340 if (!strcmp (arg, "quiet"))
4347 if (!strcmp (arg, "version"))
4355 inhibit_warnings = 1;
4364 /* We save the value of warn_uninitialized, since if they put
4365 -Wuninitialized on the command line, we need to generate a
4366 warning about not using it without also specifying -O. */
4367 if (warn_uninitialized != 1)
4368 warn_uninitialized = 2;
4371 return decode_W_option (arg + 1);
4377 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4378 warning ("`-a' option (basic block profile) not supported");
4380 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4383 else if (!strcmp (arg, "ax"))
4385 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4386 warning ("`-ax' option (jump profiling) not supported");
4388 profile_block_flag = (!profile_block_flag
4389 || profile_block_flag == 2) ? 2 : 3;
4392 else if (!strncmp (arg, "aux-info", 8))
4394 flag_gen_aux_info = 1;
4400 aux_info_file_name = argv[1];
4404 aux_info_file_name = arg + 8;
4416 asm_file_name = argv[1];
4431 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4436 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4440 if (g_switch_val == -1)
4444 g_switch_set = TRUE;
4445 g_switch_value = g_switch_val;
4455 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4456 Exit code is 35 if can't open files, 34 if fatal error,
4457 33 if had nonfatal errors, else success. */
4459 extern int main PROTO ((int, char **));
4469 /* save in case md file wants to emit args as a comment. */
4473 p = argv[0] + strlen (argv[0]);
4474 while (p != argv[0] && p[-1] != '/'
4475 #ifdef DIR_SEPARATOR
4476 && p[-1] != DIR_SEPARATOR
4482 #ifdef HAVE_LC_MESSAGES
4483 setlocale (LC_MESSAGES, "");
4485 (void) bindtextdomain (PACKAGE, localedir);
4486 (void) textdomain (PACKAGE);
4488 signal (SIGFPE, float_signal);
4491 signal (SIGPIPE, pipe_closed);
4494 decl_printable_name = decl_name;
4495 lang_expand_expr = (lang_expand_expr_t) do_abort;
4497 /* Initialize whether `char' is signed. */
4498 flag_signed_char = DEFAULT_SIGNED_CHAR;
4499 #ifdef DEFAULT_SHORT_ENUMS
4500 /* Initialize how much space enums occupy, by default. */
4501 flag_short_enums = DEFAULT_SHORT_ENUMS;
4504 /* Initialize the garbage-collector. */
4506 ggc_add_root (&input_file_stack, 1, sizeof input_file_stack,
4508 ggc_add_rtx_root (&stack_limit_rtx, 1);
4510 /* Perform language-specific options intialization. */
4511 lang_init_options ();
4513 /* Scan to see what optimization level has been specified. That will
4514 determine the default value of many flags. */
4515 for (i = 1; i < argc; i++)
4517 if (!strcmp (argv[i], "-O"))
4522 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4524 /* Handle -Os, -O2, -O3, -O69, ... */
4525 char *p = &argv[i][2];
4527 if ((p[0] == 's') && (p[1] == 0))
4531 /* Optimizing for size forces optimize to be 2. */
4536 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4537 if (optimize_val != -1)
4539 optimize = optimize_val;
4546 obey_regdecls = (optimize == 0);
4551 flag_thread_jumps = 1;
4553 flag_delayed_branch = 1;
4555 #ifdef CAN_DEBUG_WITHOUT_FP
4556 flag_omit_frame_pointer = 1;
4562 flag_cse_follow_jumps = 1;
4563 flag_cse_skip_blocks = 1;
4565 flag_expensive_optimizations = 1;
4566 flag_strength_reduce = 1;
4567 flag_rerun_cse_after_loop = 1;
4568 flag_rerun_loop_opt = 1;
4569 flag_caller_saves = 1;
4572 #ifdef INSN_SCHEDULING
4573 flag_schedule_insns = 1;
4574 flag_schedule_insns_after_reload = 1;
4577 flag_strict_aliasing = 1;
4578 flag_delete_null_pointer_checks = 1;
4583 flag_inline_functions = 1;
4586 if (optimize < 2 || optimize_size)
4591 align_functions = 1;
4594 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4597 set_target_switch ("");
4599 #ifdef OPTIMIZATION_OPTIONS
4600 /* Allow default optimizations to be specified on a per-machine basis. */
4601 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4604 /* Initialize register usage now so switches may override. */
4607 /* Perform normal command line switch decoding. */
4608 for (i = 1; i < argc;)
4610 unsigned lang_processed;
4611 unsigned indep_processed;
4613 /* Give the language a chance to decode the option for itself. */
4614 lang_processed = lang_decode_option (argc - i, argv + i);
4616 /* Now see if the option also has a language independent meaning.
4617 Some options are both language specific and language independent,
4618 eg --help. It is possible that there might be options that should
4619 only be decoded in a language independent way if the were not
4620 decoded in a langauge specific way, which is why 'lang_processed'
4622 indep_processed = independent_decode_option (argc - i, argv + i,
4625 if (lang_processed || indep_processed)
4626 i += (lang_processed > indep_processed
4627 ? lang_processed : indep_processed);
4630 const char * option = NULL;
4631 const char * lang = NULL;
4634 /* It is possible that the command line switch is not valid for the
4635 current language, but it is valid for another language. In order
4636 to be compatible with previous versions of the compiler (which
4637 did not issue an error message in this case) we check for this
4638 possibilty here. If we do find a match, then if extra_warnings
4639 is set we generate a warning message, otherwise we will just
4640 ignore the option. */
4641 for (j = 0; j < NUM_ELEM (documented_lang_options); j++)
4643 option = documented_lang_options[j].option;
4646 lang = documented_lang_options[j].description;
4647 else if (! strncmp (argv[i], option, strlen (option)))
4651 if (j != NUM_ELEM (documented_lang_options))
4655 warning ("Ignoring command line option '%s'", argv[i]);
4658 (It is valid for %s but not the selected langauge)", lang);
4662 error ("Unrecognised option `%s'", argv[i]);
4668 /* Checker uses the frame pointer. */
4669 if (flag_check_memory_usage)
4670 flag_omit_frame_pointer = 0;
4674 /* Inlining does not work if not optimizing,
4675 so force it not to be done. */
4679 /* The c_decode_option and lang_decode_option functions set
4680 this to `2' if -Wall is used, so we can avoid giving out
4681 lots of errors for people who don't realize what -Wall does. */
4682 if (warn_uninitialized == 1)
4683 warning ("-Wuninitialized is not supported without -O");
4686 #ifdef OVERRIDE_OPTIONS
4687 /* Some machines may reject certain combinations of options. */
4691 if (exceptions_via_longjmp == 2)
4693 #ifdef DWARF2_UNWIND_INFO
4694 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4696 exceptions_via_longjmp = 1;
4700 /* Set up the align_*_log variables, defaulting them to 1 if they
4701 were still unset. */
4702 if (align_loops <= 0) align_loops = 1;
4703 align_loops_log = floor_log2 (align_loops*2-1);
4704 if (align_jumps <= 0) align_jumps = 1;
4705 align_jumps_log = floor_log2 (align_jumps*2-1);
4706 if (align_labels <= 0) align_labels = 1;
4707 align_labels_log = floor_log2 (align_labels*2-1);
4708 if (align_functions <= 0) align_functions = 1;
4709 align_functions_log = floor_log2 (align_functions*2-1);
4711 if (profile_block_flag == 3)
4713 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4714 profile_block_flag = 2;
4717 /* Unrolling all loops implies that standard loop unrolling must also
4719 if (flag_unroll_all_loops)
4720 flag_unroll_loops = 1;
4721 /* Loop unrolling requires that strength_reduction be on also. Silently
4722 turn on strength reduction here if it isn't already on. Also, the loop
4723 unrolling code assumes that cse will be run after loop, so that must
4724 be turned on also. */
4725 if (flag_unroll_loops)
4727 flag_strength_reduce = 1;
4728 flag_rerun_cse_after_loop = 1;
4731 /* Warn about options that are not supported on this machine. */
4732 #ifndef INSN_SCHEDULING
4733 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4734 warning ("instruction scheduling not supported on this target machine");
4737 if (flag_delayed_branch)
4738 warning ("this target machine does not have delayed branches");
4741 user_label_prefix = USER_LABEL_PREFIX;
4742 if (flag_leading_underscore != -1)
4744 /* If the default prefix is more complicated than "" or "_",
4745 issue a warning and ignore this option. */
4746 if (user_label_prefix[0] == 0 ||
4747 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4749 user_label_prefix = flag_leading_underscore ? "_" : "";
4752 warning ("-f%sleading-underscore not supported on this target machine",
4753 flag_leading_underscore ? "" : "no-");
4756 /* If we are in verbose mode, write out the version and maybe all the
4757 option flags in use. */
4760 print_version (stderr, "");
4762 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4765 compile_file (filename);
4767 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4770 char *lim = (char *) sbrk (0);
4772 fnotice (stderr, "Data size %ld.\n", (long) (lim - (char *) &environ));
4777 system ("ps -l 1>&2");
4780 #endif /* not USG */
4783 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4786 return (FATAL_EXIT_CODE);
4788 return (FATAL_EXIT_CODE);
4789 return (SUCCESS_EXIT_CODE);
4792 /* Decode -m switches. */
4793 /* Decode the switch -mNAME. */
4796 set_target_switch (name)
4800 int valid_target_option = 0;
4802 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4803 if (!strcmp (target_switches[j].name, name))
4805 if (target_switches[j].value < 0)
4806 target_flags &= ~-target_switches[j].value;
4808 target_flags |= target_switches[j].value;
4809 valid_target_option = 1;
4812 #ifdef TARGET_OPTIONS
4813 if (!valid_target_option)
4814 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4816 int len = strlen (target_options[j].prefix);
4817 if (!strncmp (target_options[j].prefix, name, len))
4819 *target_options[j].variable = name + len;
4820 valid_target_option = 1;
4825 if (!valid_target_option)
4826 error ("Invalid option `%s'", name);
4829 /* Print version information to FILE.
4830 Each line begins with INDENT (for the case where FILE is the
4831 assembler output file). */
4834 print_version (file, indent)
4839 #define __VERSION__ "[?]"
4843 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4845 "%s%s%s version %s (%s) compiled by CC.\n"
4847 , indent, *indent != 0 ? " " : "",
4848 language_string, version_string, TARGET_NAME, __VERSION__);
4851 /* Print an option value and return the adjusted position in the line.
4852 ??? We don't handle error returns from fprintf (disk full); presumably
4853 other code will catch a disk full though. */
4856 print_single_switch (file, pos, max, indent, sep, term, type, name)
4859 const char *indent, *sep, *term, *type, *name;
4861 /* The ultrix fprintf returns 0 on success, so compute the result we want
4862 here since we need it for the following test. */
4863 int len = strlen (sep) + strlen (type) + strlen (name);
4868 fprintf (file, "%s", term);
4873 fprintf (file, "%s", indent);
4874 pos = strlen (indent);
4876 fprintf (file, "%s%s%s", sep, type, name);
4881 /* Print active target switches to FILE.
4882 POS is the current cursor position and MAX is the size of a "line".
4883 Each line begins with INDENT and ends with TERM.
4884 Each switch is separated from the next by SEP. */
4887 print_switch_values (file, pos, max, indent, sep, term)
4890 const char *indent, *sep, *term;
4895 /* Print the options as passed. */
4897 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4898 _("options passed: "), "");
4900 for (p = &save_argv[1]; *p != NULL; p++)
4904 if (strcmp (*p, "-o") == 0)
4910 if (strcmp (*p, "-quiet") == 0)
4912 if (strcmp (*p, "-version") == 0)
4917 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4920 fprintf (file, "%s", term);
4922 /* Print the -f and -m options that have been enabled.
4923 We don't handle language specific options but printing argv
4926 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4927 _("options enabled: "), "");
4929 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
4930 if (*f_options[j].variable == f_options[j].on_value)
4931 pos = print_single_switch (file, pos, max, indent, sep, term,
4932 "-f", f_options[j].string);
4934 /* Print target specific options. */
4936 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4937 if (target_switches[j].name[0] != '\0'
4938 && target_switches[j].value > 0
4939 && ((target_switches[j].value & target_flags)
4940 == target_switches[j].value))
4942 pos = print_single_switch (file, pos, max, indent, sep, term,
4943 "-m", target_switches[j].name);
4946 #ifdef TARGET_OPTIONS
4947 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4948 if (*target_options[j].variable != NULL)
4951 sprintf (prefix, "-m%s", target_options[j].prefix);
4952 pos = print_single_switch (file, pos, max, indent, sep, term,
4953 prefix, *target_options[j].variable);
4957 fprintf (file, "%s", term);
4960 /* Record the beginning of a new source file, named FILENAME. */
4963 debug_start_source_file (filename)
4964 register char *filename ATTRIBUTE_UNUSED;
4966 #ifdef DBX_DEBUGGING_INFO
4967 if (write_symbols == DBX_DEBUG)
4968 dbxout_start_new_source_file (filename);
4970 #ifdef DWARF_DEBUGGING_INFO
4971 if (debug_info_level == DINFO_LEVEL_VERBOSE
4972 && write_symbols == DWARF_DEBUG)
4973 dwarfout_start_new_source_file (filename);
4974 #endif /* DWARF_DEBUGGING_INFO */
4975 #ifdef DWARF2_DEBUGGING_INFO
4976 if (debug_info_level == DINFO_LEVEL_VERBOSE
4977 && write_symbols == DWARF2_DEBUG)
4978 dwarf2out_start_source_file (filename);
4979 #endif /* DWARF2_DEBUGGING_INFO */
4980 #ifdef SDB_DEBUGGING_INFO
4981 if (write_symbols == SDB_DEBUG)
4982 sdbout_start_new_source_file (filename);
4986 /* Record the resumption of a source file. LINENO is the line number in
4987 the source file we are returning to. */
4990 debug_end_source_file (lineno)
4991 register unsigned lineno ATTRIBUTE_UNUSED;
4993 #ifdef DBX_DEBUGGING_INFO
4994 if (write_symbols == DBX_DEBUG)
4995 dbxout_resume_previous_source_file ();
4997 #ifdef DWARF_DEBUGGING_INFO
4998 if (debug_info_level == DINFO_LEVEL_VERBOSE
4999 && write_symbols == DWARF_DEBUG)
5000 dwarfout_resume_previous_source_file (lineno);
5001 #endif /* DWARF_DEBUGGING_INFO */
5002 #ifdef DWARF2_DEBUGGING_INFO
5003 if (debug_info_level == DINFO_LEVEL_VERBOSE
5004 && write_symbols == DWARF2_DEBUG)
5005 dwarf2out_end_source_file ();
5006 #endif /* DWARF2_DEBUGGING_INFO */
5007 #ifdef SDB_DEBUGGING_INFO
5008 if (write_symbols == SDB_DEBUG)
5009 sdbout_resume_previous_source_file ();
5013 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5014 the tail part of the directive line, i.e. the part which is past the
5015 initial whitespace, #, whitespace, directive-name, whitespace part. */
5018 debug_define (lineno, buffer)
5019 register unsigned lineno ATTRIBUTE_UNUSED;
5020 register char *buffer ATTRIBUTE_UNUSED;
5022 #ifdef DWARF_DEBUGGING_INFO
5023 if (debug_info_level == DINFO_LEVEL_VERBOSE
5024 && write_symbols == DWARF_DEBUG)
5025 dwarfout_define (lineno, buffer);
5026 #endif /* DWARF_DEBUGGING_INFO */
5027 #ifdef DWARF2_DEBUGGING_INFO
5028 if (debug_info_level == DINFO_LEVEL_VERBOSE
5029 && write_symbols == DWARF2_DEBUG)
5030 dwarf2out_define (lineno, buffer);
5031 #endif /* DWARF2_DEBUGGING_INFO */
5034 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5035 the tail part of the directive line, i.e. the part which is past the
5036 initial whitespace, #, whitespace, directive-name, whitespace part. */
5039 debug_undef (lineno, buffer)
5040 register unsigned lineno ATTRIBUTE_UNUSED;
5041 register char *buffer ATTRIBUTE_UNUSED;
5043 #ifdef DWARF_DEBUGGING_INFO
5044 if (debug_info_level == DINFO_LEVEL_VERBOSE
5045 && write_symbols == DWARF_DEBUG)
5046 dwarfout_undef (lineno, buffer);
5047 #endif /* DWARF_DEBUGGING_INFO */
5048 #ifdef DWARF2_DEBUGGING_INFO
5049 if (debug_info_level == DINFO_LEVEL_VERBOSE
5050 && write_symbols == DWARF2_DEBUG)
5051 dwarf2out_undef (lineno, buffer);
5052 #endif /* DWARF2_DEBUGGING_INFO */