1 /* Top level of GNU C compiler
2 Copyright (C) 1987, 88, 89, 92-98, 1999, 2000 Free Software Foundation, Inc.
4 This file is part of GNU CC.
6 GNU CC is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 GNU CC is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU CC; see the file COPYING. If not, write to
18 the Free Software Foundation, 59 Temple Place - Suite 330,
19 Boston, MA 02111-1307, USA. */
21 /* This is the top level of cc1/c++.
22 It parses command args, opens files, invokes the various passes
23 in the proper order, and counts the time used by each.
24 Error messages and low-level interface to malloc also handled here. */
27 #undef FLOAT /* This is for hpux. They should change hpux. */
28 #undef FFS /* Some systems define this in param.h. */
33 #ifdef HAVE_SYS_RESOURCE_H
34 # include <sys/resource.h>
37 #ifdef HAVE_SYS_TIMES_H
38 # include <sys/times.h>
46 #include "insn-attr.h"
47 #include "insn-codes.h"
48 #include "insn-config.h"
56 #include "basic-block.h"
63 #ifdef DWARF_DEBUGGING_INFO
67 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
68 #include "dwarf2out.h"
71 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
75 #ifdef SDB_DEBUGGING_INFO
79 #ifdef XCOFF_DEBUGGING_INFO
84 /* The extra parameters substantially improve the I/O performance. */
86 vms_fopen (fname, type)
90 /* The <stdio.h> in the gcc-vms-1.42 distribution prototypes fopen with two
91 fixed arguments, which matches ANSI's specification but not VAXCRTL's
92 pre-ANSI implementation. This hack circumvents the mismatch problem. */
93 FILE *(*vmslib_fopen)() = (FILE *(*)()) fopen;
96 return (*vmslib_fopen) (fname, type, "mbc=32",
97 "deq=64", "fop=tef", "shr=nil");
99 return (*vmslib_fopen) (fname, type, "mbc=32");
101 #define fopen vms_fopen
104 #ifndef DEFAULT_GDB_EXTENSIONS
105 #define DEFAULT_GDB_EXTENSIONS 1
108 /* If more than one debugging type is supported, you must define
109 PREFERRED_DEBUGGING_TYPE to choose a format in a system-dependent way.
111 This is one long line cause VAXC can't handle a \-newline. */
112 #if 1 < (defined (DBX_DEBUGGING_INFO) + defined (SDB_DEBUGGING_INFO) + defined (DWARF_DEBUGGING_INFO) + defined (DWARF2_DEBUGGING_INFO) + defined (XCOFF_DEBUGGING_INFO))
113 #ifndef PREFERRED_DEBUGGING_TYPE
114 You Lose! You must define PREFERRED_DEBUGGING_TYPE!
115 #endif /* no PREFERRED_DEBUGGING_TYPE */
116 #else /* Only one debugging format supported. Define PREFERRED_DEBUGGING_TYPE
117 so the following code needn't care. */
118 #ifdef DBX_DEBUGGING_INFO
119 #define PREFERRED_DEBUGGING_TYPE DBX_DEBUG
121 #ifdef SDB_DEBUGGING_INFO
122 #define PREFERRED_DEBUGGING_TYPE SDB_DEBUG
124 #ifdef DWARF_DEBUGGING_INFO
125 #define PREFERRED_DEBUGGING_TYPE DWARF_DEBUG
127 #ifdef DWARF2_DEBUGGING_INFO
128 #define PREFERRED_DEBUGGING_TYPE DWARF2_DEBUG
130 #ifdef XCOFF_DEBUGGING_INFO
131 #define PREFERRED_DEBUGGING_TYPE XCOFF_DEBUG
133 #endif /* More than one debugger format enabled. */
135 /* If still not defined, must have been because no debugging formats
137 #ifndef PREFERRED_DEBUGGING_TYPE
138 #define PREFERRED_DEBUGGING_TYPE NO_DEBUG
141 #ifdef NEED_DECLARATION_ENVIRON
142 extern char **environ;
145 /* Carry information from ASM_DECLARE_OBJECT_NAME
146 to ASM_FINISH_DECLARE_OBJECT. */
148 extern int size_directive_output;
149 extern tree last_assemble_variable_decl;
151 static void set_target_switch PARAMS ((const char *));
152 static const char *decl_name PARAMS ((tree, int));
154 static void float_signal PARAMS ((int)) ATTRIBUTE_NORETURN;
155 static void pipe_closed PARAMS ((int)) ATTRIBUTE_NORETURN;
156 #ifdef ASM_IDENTIFY_LANGUAGE
157 /* This might or might not be used in ASM_IDENTIFY_LANGUAGE. */
158 static void output_lang_identify PARAMS ((FILE *)) ATTRIBUTE_UNUSED;
160 static void open_dump_file PARAMS ((const char *, const char *));
161 static void close_dump_file PARAMS ((void (*) (FILE *, rtx), rtx));
162 static void dump_rtl PARAMS ((const char *, tree, void (*) (FILE *, rtx), rtx));
163 static void clean_dump_file PARAMS ((const char *));
164 static void compile_file PARAMS ((char *));
165 static void display_help PARAMS ((void));
166 static void mark_file_stack PARAMS ((void *));
168 static void decode_d_option PARAMS ((const char *));
169 static int decode_f_option PARAMS ((const char *));
170 static int decode_W_option PARAMS ((const char *));
171 static int decode_g_option PARAMS ((const char *));
172 static unsigned independent_decode_option PARAMS ((int, char **, unsigned));
174 static void print_version PARAMS ((FILE *, const char *));
175 static int print_single_switch PARAMS ((FILE *, int, int, const char *,
176 const char *, const char *,
177 const char *, const char *));
178 static void print_switch_values PARAMS ((FILE *, int, int, const char *,
179 const char *, const char *));
181 /* Length of line when printing switch values. */
184 /* Name of program invoked, sans directories. */
186 const char *progname;
188 /* Copy of arguments to main. */
192 /* Name of current original source file (what was input to cpp).
193 This comes from each #-command in the actual input. */
195 char *input_filename;
197 /* Name of top-level original source file (what was input to cpp).
198 This comes from the #-command at the beginning of the actual input.
199 If there isn't any there, then this is the cc1 input file name. */
201 char *main_input_filename;
203 /* Current line number in real source file. */
207 /* Nonzero if it is unsafe to create any new pseudo registers. */
210 /* Stack of currently pending input files. */
212 struct file_stack *input_file_stack;
214 /* Incremented on each change to input_file_stack. */
215 int input_file_stack_tick;
217 /* Name to use as base of names for dump output files. */
219 const char *dump_base_name;
221 /* Bit flags that specify the machine subtype we are compiling for.
222 Bits are tested using macros TARGET_... defined in the tm.h file
223 and set by `-m...' switches. Must be defined in rtlanal.c. */
225 extern int target_flags;
227 /* Flags saying which kinds of debugging dump have been requested. */
230 int rtl_dump_and_exit = 0;
231 int jump_opt_dump = 0;
232 int addressof_dump = 0;
237 int branch_prob_dump = 0;
239 int combine_dump = 0;
240 int regmove_dump = 0;
242 int local_reg_dump = 0;
243 int global_reg_dump = 0;
245 int peephole2_dump = 0;
247 int jump2_opt_dump = 0;
249 int dbr_sched_dump = 0;
251 int reorder_blocks_dump = 0;
252 int flag_print_asm_name = 0;
254 int stack_reg_dump = 0;
256 #ifdef MACHINE_DEPENDENT_REORG
257 int mach_dep_reorg_dump = 0;
259 static int flag_print_mem = 0;
260 static int version_flag = 0;
261 static char * filename = 0;
262 enum graph_dump_types graph_dump_format;
264 /* Name for output file of assembly code, specified with -o. */
268 /* Value of the -G xx switch, and whether it was passed or not. */
272 /* Type(s) of debugging information we are producing (if any).
273 See flags.h for the definitions of the different possible
274 types of debugging information. */
275 enum debug_info_type write_symbols = NO_DEBUG;
277 /* Level of debugging information we are producing. See flags.h
278 for the definitions of the different possible levels. */
279 enum debug_info_level debug_info_level = DINFO_LEVEL_NONE;
281 /* Nonzero means use GNU-only extensions in the generated symbolic
282 debugging information. */
283 /* Currently, this only has an effect when write_symbols is set to
284 DBX_DEBUG, XCOFF_DEBUG, or DWARF_DEBUG. */
285 int use_gnu_debug_info_extensions = 0;
287 /* Nonzero means do optimizations. -O.
288 Particular numeric values stand for particular amounts of optimization;
289 thus, -O2 stores 2 here. However, the optimizations beyond the basic
290 ones are not controlled directly by this variable. Instead, they are
291 controlled by individual `flag_...' variables that are defaulted
292 based on this variable. */
296 /* Nonzero means optimize for size. -Os.
297 The only valid values are zero and non-zero. When optimize_size is
298 non-zero, optimize defaults to 2, but certain individual code
299 bloating optimizations are disabled. */
301 int optimize_size = 0;
303 /* Number of error messages and warning messages so far. */
306 int warningcount = 0;
309 /* Pointer to function to compute the name to use to print a declaration.
310 DECL is the declaration in question.
311 VERBOSITY determines what information will be printed:
312 0: DECL_NAME, demangled as necessary.
313 1: and scope information.
314 2: and any other information that might be interesting, such as function
315 parameter types in C++. */
317 const char *(*decl_printable_name) PARAMS ((tree, int));
319 /* Pointer to function to compute rtl for a language-specific tree code. */
321 typedef rtx (*lang_expand_expr_t)
322 PARAMS ((union tree_node *, rtx, enum machine_mode,
323 enum expand_modifier modifier));
325 lang_expand_expr_t lang_expand_expr = 0;
327 tree (*lang_expand_constant) PARAMS ((tree)) = 0;
329 /* Pointer to function to finish handling an incomplete decl at the
330 end of compilation. */
332 void (*incomplete_decl_finalize_hook) PARAMS ((tree)) = 0;
334 /* Nonzero if generating code to do profiling. */
336 int profile_flag = 0;
338 /* Nonzero if generating code to do profiling on a line-by-line basis. */
340 int profile_block_flag;
342 /* Nonzero if generating code to profile program flow graph arcs. */
344 int profile_arc_flag = 0;
346 /* Nonzero if generating info for gcov to calculate line test coverage. */
348 int flag_test_coverage = 0;
350 /* Nonzero indicates that branch taken probabilities should be calculated. */
352 int flag_branch_probabilities = 0;
354 /* Nonzero if basic blocks should be reordered. */
356 int flag_reorder_blocks = 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 /* Don't print functions as they are compiled and don't print
369 times taken by the various passes. -quiet. */
375 /* Nonzero means `char' should be signed. */
377 int flag_signed_char;
379 /* Nonzero means give an enum type only as many bytes as it needs. */
381 int flag_short_enums;
383 /* Nonzero for -fcaller-saves: allocate values in regs that need to
384 be saved across function calls, if that produces overall better code.
385 Optional now, so people can test it. */
387 #ifdef DEFAULT_CALLER_SAVES
388 int flag_caller_saves = 1;
390 int flag_caller_saves = 0;
393 /* Nonzero if structures and unions should be returned in memory.
395 This should only be defined if compatibility with another compiler or
396 with an ABI is needed, because it results in slower code. */
398 #ifndef DEFAULT_PCC_STRUCT_RETURN
399 #define DEFAULT_PCC_STRUCT_RETURN 1
402 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
404 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
406 /* Nonzero for -fforce-mem: load memory value into a register
407 before arithmetic on it. This makes better cse but slower compilation. */
409 int flag_force_mem = 0;
411 /* Nonzero for -fforce-addr: load memory address into a register before
412 reference to memory. This makes better cse but slower compilation. */
414 int flag_force_addr = 0;
416 /* Nonzero for -fdefer-pop: don't pop args after each function call;
417 instead save them up to pop many calls' args with one insns. */
419 int flag_defer_pop = 0;
421 /* Nonzero for -ffloat-store: don't allocate floats and doubles
422 in extended-precision registers. */
424 int flag_float_store = 0;
426 /* Nonzero for -fcse-follow-jumps:
427 have cse follow jumps to do a more extensive job. */
429 int flag_cse_follow_jumps;
431 /* Nonzero for -fcse-skip-blocks:
432 have cse follow a branch around a block. */
433 int flag_cse_skip_blocks;
435 /* Nonzero for -fexpensive-optimizations:
436 perform miscellaneous relatively-expensive optimizations. */
437 int flag_expensive_optimizations;
439 /* Nonzero for -fthread-jumps:
440 have jump optimize output of loop. */
442 int flag_thread_jumps;
444 /* Nonzero enables strength-reduction in loop.c. */
446 int flag_strength_reduce = 0;
448 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
449 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
450 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
453 int flag_unroll_loops;
455 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
456 This is generally not a win. */
458 int flag_unroll_all_loops;
460 /* Nonzero forces all invariant computations in loops to be moved
463 int flag_move_all_movables = 0;
465 /* Nonzero forces all general induction variables in loops to be
468 int flag_reduce_all_givs = 0;
470 /* Nonzero to perform full register move optimization passes. This is the
473 int flag_regmove = 0;
475 /* Nonzero for -fwritable-strings:
476 store string constants in data segment and don't uniquize them. */
478 int flag_writable_strings = 0;
480 /* Nonzero means don't put addresses of constant functions in registers.
481 Used for compiling the Unix kernel, where strange substitutions are
482 done on the assembly output. */
484 int flag_no_function_cse = 0;
486 /* Nonzero for -fomit-frame-pointer:
487 don't make a frame pointer in simple functions that don't require one. */
489 int flag_omit_frame_pointer = 0;
491 /* Nonzero means place each function into its own section on those platforms
492 which support arbitrary section names and unlimited numbers of sections. */
494 int flag_function_sections = 0;
496 /* ... and similar for data. */
498 int flag_data_sections = 0;
500 /* Nonzero to inhibit use of define_optimization peephole opts. */
502 int flag_no_peephole = 0;
504 /* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
505 operations in the interest of optimization. For example it allows
506 GCC to assume arguments to sqrt are nonnegative numbers, allowing
507 faster code for sqrt to be generated. */
509 int flag_fast_math = 0;
511 /* Nonzero means the front end generally wants `errno' maintained by math
512 operations, like built-in SQRT, unless overridden by flag_fast_math. */
514 int flag_errno_math = 1;
516 /* 0 means straightforward implementation of complex divide acceptable.
517 1 means wide ranges of inputs must work for complex divide.
518 2 means C9X-like requirements for complex divide (not yet implemented). */
520 int flag_complex_divide_method = 0;
522 /* Nonzero means all references through pointers are volatile. */
526 /* Nonzero means treat all global and extern variables as volatile. */
528 int flag_volatile_global;
530 /* Nonzero means treat all static variables as volatile. */
532 int flag_volatile_static;
534 /* Nonzero means just do syntax checking; don't output anything. */
536 int flag_syntax_only = 0;
538 /* Nonzero means perform global cse. */
540 static int flag_gcse;
542 /* Nonzero means to use global dataflow analysis to eliminate
543 useless null pointer tests. */
545 static int flag_delete_null_pointer_checks;
547 /* Nonzero means to rerun cse after loop optimization. This increases
548 compilation time about 20% and picks up a few more common expressions. */
550 static int flag_rerun_cse_after_loop;
552 /* Nonzero means to run loop optimizations twice. */
554 int flag_rerun_loop_opt;
556 /* Nonzero for -finline-functions: ok to inline functions that look like
557 good inline candidates. */
559 int flag_inline_functions;
561 /* Nonzero for -fkeep-inline-functions: even if we make a function
562 go inline everywhere, keep its definition around for debugging
565 int flag_keep_inline_functions;
567 /* Nonzero means that functions will not be inlined. */
571 /* Nonzero means that we should emit static const variables
572 regardless of whether or not optimization is turned on. */
574 int flag_keep_static_consts = 1;
576 /* Nonzero means we should be saving declaration info into a .X file. */
578 int flag_gen_aux_info = 0;
580 /* Specified name of aux-info file. */
582 static char *aux_info_file_name;
584 /* Nonzero means make the text shared if supported. */
586 int flag_shared_data;
588 /* Nonzero means schedule into delayed branch slots if supported. */
590 int flag_delayed_branch;
592 /* Nonzero if we are compiling pure (sharable) code.
593 Value is 1 if we are doing reasonable (i.e. simple
594 offset into offset table) pic. Value is 2 if we can
595 only perform register offsets. */
599 /* Nonzero means generate extra code for exception handling and enable
600 exception handling. */
604 /* Nonzero means use the new model for exception handling. Replaces
605 -DNEW_EH_MODEL as a compile option. */
607 int flag_new_exceptions = 1;
609 /* Nonzero means generate frame unwind info table when supported */
611 int flag_unwind_tables = 0;
613 /* Nonzero means don't place uninitialized global data in common storage
618 /* Nonzero means pretend it is OK to examine bits of target floats,
619 even if that isn't true. The resulting code will have incorrect constants,
620 but the same series of instructions that the native compiler would make. */
622 int flag_pretend_float;
624 /* Nonzero means change certain warnings into errors.
625 Usually these are warnings about failure to conform to some standard. */
627 int flag_pedantic_errors = 0;
629 /* flag_schedule_insns means schedule insns within basic blocks (before
631 flag_schedule_insns_after_reload means schedule insns after
634 int flag_schedule_insns = 0;
635 int flag_schedule_insns_after_reload = 0;
637 /* The following flags have effect only for scheduling before register
640 flag_schedule_interblock means schedule insns accross basic blocks.
641 flag_schedule_speculative means allow speculative motion of non-load insns.
642 flag_schedule_speculative_load means allow speculative motion of some
644 flag_schedule_speculative_load_dangerous allows speculative motion of more
647 int flag_schedule_interblock = 1;
648 int flag_schedule_speculative = 1;
649 int flag_schedule_speculative_load = 0;
650 int flag_schedule_speculative_load_dangerous = 0;
652 /* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
653 by a cheaper branch, on a count register. */
654 int flag_branch_on_count_reg;
656 /* -finhibit-size-directive inhibits output of .size for ELF.
657 This is used only for compiling crtstuff.c,
658 and it may be extended to other effects
659 needed for crtstuff.c on other systems. */
660 int flag_inhibit_size_directive = 0;
662 /* -fverbose-asm causes extra commentary information to be produced in
663 the generated assembly code (to make it more readable). This option
664 is generally only of use to those who actually need to read the
665 generated assembly code (perhaps while debugging the compiler itself).
666 -fno-verbose-asm, the default, causes the extra information
667 to be omitted and is useful when comparing two assembler files. */
669 int flag_verbose_asm = 0;
671 /* -dA causes debug commentary information to be produced in
672 the generated assembly code (to make it more readable). This option
673 is generally only of use to those who actually need to read the
674 generated assembly code (perhaps while debugging the compiler itself).
675 Currently, this switch is only used by dwarfout.c; however, it is intended
676 to be a catchall for printing debug information in the assembler file. */
678 int flag_debug_asm = 0;
680 /* -fgnu-linker specifies use of the GNU linker for initializations.
681 (Or, more generally, a linker that handles initializations.)
682 -fno-gnu-linker says that collect2 will be used. */
684 int flag_gnu_linker = 0;
686 int flag_gnu_linker = 1;
689 /* Tag all structures with __attribute__(packed) */
690 int flag_pack_struct = 0;
692 /* Emit code to check for stack overflow; also may cause large objects
693 to be allocated dynamically. */
694 int flag_stack_check;
696 /* When non-NULL, indicates that whenever space is allocated on the
697 stack, the resulting stack pointer must not pass this
698 address---that is, for stacks that grow downward, the stack pointer
699 must always be greater than or equal to this address; for stacks
700 that grow upward, the stack pointer must be less than this address.
701 At present, the rtx may be either a REG or a SYMBOL_REF, although
702 the support provided depends on the backend. */
705 /* -fcheck-memory-usage causes extra code to be generated in order to check
706 memory accesses. This is used by a detector of bad memory accesses such
708 int flag_check_memory_usage = 0;
710 /* -fprefix-function-name causes function name to be prefixed. This
711 can be used with -fcheck-memory-usage to isolate code compiled with
712 -fcheck-memory-usage. */
713 int flag_prefix_function_name = 0;
715 /* 0 if pointer arguments may alias each other. True in C.
716 1 if pointer arguments may not alias each other but may alias
718 2 if pointer arguments may not alias each other and may not
719 alias global variables. True in Fortran.
720 This defaults to 0 for C. */
721 int flag_argument_noalias = 0;
723 /* Nonzero if we should do (language-dependent) alias analysis.
724 Typically, this analysis will assume that expressions of certain
725 types do not alias expressions of certain other types. Only used
726 if alias analysis (in general) is enabled. */
727 int flag_strict_aliasing = 0;
729 /* Instrument functions with calls at entry and exit, for profiling. */
730 int flag_instrument_function_entry_exit = 0;
732 /* Nonzero means ignore `#ident' directives. 0 means handle them.
733 On SVR4 targets, it also controls whether or not to emit a
734 string identifying the compiler. */
736 int flag_no_ident = 0;
738 /* This will perform a peephole pass before sched2. */
739 int flag_peephole2 = 0;
741 /* -fbounded-pointers causes gcc to compile pointers as composite
742 objects occupying three words: the pointer value, the base address
743 of the referent object, and the address immediately beyond the end
744 of the referent object. The base and extent allow us to perform
745 runtime bounds checking. -fbounded-pointers implies -fcheck-bounds. */
746 int flag_bounded_pointers = 0;
748 /* -fcheck-bounds causes gcc to generate array bounds checks.
749 For C, C++: defaults to value of flag_bounded_pointers.
750 For ObjC: defaults to off.
751 For Java: defaults to on.
752 For Fortran: defaults to off.
753 For CHILL: defaults to off. */
754 int flag_bounds_check = 0;
756 /* If one, renumber instruction UIDs to reduce the number of
757 unused UIDs if there are a lot of instructions. If greater than
758 one, unconditionally renumber instruction UIDs. */
759 int flag_renumber_insns = 1;
761 /* Values of the -falign-* flags: how much to align labels in code.
762 0 means `use default', 1 means `don't align'.
763 For each variable, there is an _log variant which is the power
764 of two not less than the variable, for .align output. */
771 int align_labels_log;
773 int align_functions_log;
775 /* Table of supported debugging formats. */
779 /* Since PREFERRED_DEBUGGING_TYPE isn't necessarily a
780 constant expression, we use NO_DEBUG in its place. */
781 enum debug_info_type debug_type;
782 int use_extensions_p;
783 const char * description;
787 { "", NO_DEBUG, DEFAULT_GDB_EXTENSIONS,
788 "Generate default debug format output" },
789 { "gdb", NO_DEBUG, 1, "Generate default extended debug format output" },
790 #ifdef DBX_DEBUGGING_INFO
791 { "stabs", DBX_DEBUG, 0, "Generate STABS format debug output" },
792 { "stabs+", DBX_DEBUG, 1, "Generate extended STABS format debug output" },
794 #ifdef DWARF_DEBUGGING_INFO
795 { "dwarf", DWARF_DEBUG, 0, "Generate DWARF-1 format debug output"},
796 { "dwarf+", DWARF_DEBUG, 1,
797 "Generated extended DWARF-1 format debug output" },
799 #ifdef DWARF2_DEBUGGING_INFO
800 { "dwarf-2", DWARF2_DEBUG, 0, "Enable DWARF-2 debug output" },
802 #ifdef XCOFF_DEBUGGING_INFO
803 { "xcoff", XCOFF_DEBUG, 0, "Generate XCOFF format debug output" },
804 { "xcoff+", XCOFF_DEBUG, 1, "Generate extended XCOFF format debug output" },
806 #ifdef SDB_DEBUGGING_INFO
807 { "coff", SDB_DEBUG, 0, "Generate COFF format debug output" },
817 const char * description;
819 lang_independent_options;
821 /* Add or remove a leading underscore from user symbols. */
822 int flag_leading_underscore = -1;
824 /* The user symbol prefix after having resolved same. */
825 const char *user_label_prefix;
827 /* A default for same. */
828 #ifndef USER_LABEL_PREFIX
829 #define USER_LABEL_PREFIX ""
832 /* Table of language-independent -f options.
833 STRING is the option name. VARIABLE is the address of the variable.
834 ON_VALUE is the value to store in VARIABLE
835 if `-fSTRING' is seen as an option.
836 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
838 lang_independent_options f_options[] =
840 {"float-store", &flag_float_store, 1,
841 "Do not store floats in registers" },
842 {"volatile", &flag_volatile, 1,
843 "Consider all mem refs through pointers as volatile"},
844 {"volatile-global", &flag_volatile_global, 1,
845 "Consider all mem refs to global data to be volatile" },
846 {"volatile-static", &flag_volatile_static, 1,
847 "Consider all mem refs to static data to be volatile" },
848 {"defer-pop", &flag_defer_pop, 1,
849 "Defer popping functions args from stack until later" },
850 {"omit-frame-pointer", &flag_omit_frame_pointer, 1,
851 "When possible do not generate stack frames"},
852 {"cse-follow-jumps", &flag_cse_follow_jumps, 1,
853 "When running CSE, follow jumps to their targets" },
854 {"cse-skip-blocks", &flag_cse_skip_blocks, 1,
855 "When running CSE, follow conditional jumps" },
856 {"expensive-optimizations", &flag_expensive_optimizations, 1,
857 "Perform a number of minor, expensive optimisations" },
858 {"thread-jumps", &flag_thread_jumps, 1,
859 "Perform jump threading optimisations"},
860 {"strength-reduce", &flag_strength_reduce, 1,
861 "Perform strength reduction optimisations" },
862 {"unroll-loops", &flag_unroll_loops, 1,
863 "Perform loop unrolling when iteration count is known" },
864 {"unroll-all-loops", &flag_unroll_all_loops, 1,
865 "Perform loop unrolling for all loops" },
866 {"move-all-movables", &flag_move_all_movables, 1,
867 "Force all loop invariant computations out of loops" },
868 {"reduce-all-givs", &flag_reduce_all_givs, 1,
869 "Strength reduce all loop general induction variables" },
870 {"writable-strings", &flag_writable_strings, 1,
871 "Store strings in writable data section" },
872 {"peephole", &flag_no_peephole, 0,
873 "Enable machine specific peephole optimisations" },
874 {"force-mem", &flag_force_mem, 1,
875 "Copy memory operands into registers before using" },
876 {"force-addr", &flag_force_addr, 1,
877 "Copy memory address constants into regs before using" },
878 {"function-cse", &flag_no_function_cse, 0,
879 "Allow function addresses to be held in registers" },
880 {"inline-functions", &flag_inline_functions, 1,
881 "Integrate simple functions into their callers" },
882 {"keep-inline-functions", &flag_keep_inline_functions, 1,
883 "Generate code for funcs even if they are fully inlined" },
884 {"inline", &flag_no_inline, 0,
885 "Pay attention to the 'inline' keyword"},
886 {"keep-static-consts", &flag_keep_static_consts, 1,
887 "Emit static const variables even if they are not used" },
888 {"syntax-only", &flag_syntax_only, 1,
889 "Check for syntax errors, then stop" },
890 {"shared-data", &flag_shared_data, 1,
891 "Mark data as shared rather than private" },
892 {"caller-saves", &flag_caller_saves, 1,
893 "Enable saving registers around function calls" },
894 {"pcc-struct-return", &flag_pcc_struct_return, 1,
895 "Return 'short' aggregates in memory, not registers" },
896 {"reg-struct-return", &flag_pcc_struct_return, 0,
897 "Return 'short' aggregates in registers" },
898 {"delayed-branch", &flag_delayed_branch, 1,
899 "Attempt to fill delay slots of branch instructions" },
900 {"gcse", &flag_gcse, 1,
901 "Perform the global common subexpression elimination" },
902 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1,
903 "Run CSE pass after loop optimisations"},
904 {"rerun-loop-opt", &flag_rerun_loop_opt, 1,
905 "Run the loop optimiser twice"},
906 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1,
907 "Delete useless null pointer checks" },
908 {"pretend-float", &flag_pretend_float, 1,
909 "Pretend that host and target use the same FP format"},
910 {"schedule-insns", &flag_schedule_insns, 1,
911 "Reschedule instructions to avoid pipeline stalls"},
912 {"schedule-insns2", &flag_schedule_insns_after_reload, 1,
913 "Run two passes of the instruction scheduler"},
914 {"sched-interblock",&flag_schedule_interblock, 1,
915 "Enable scheduling across basic blocks" },
916 {"sched-spec",&flag_schedule_speculative, 1,
917 "Allow speculative motion of non-loads" },
918 {"sched-spec-load",&flag_schedule_speculative_load, 1,
919 "Allow speculative motion of some loads" },
920 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1,
921 "Allow speculative motion of more loads" },
922 {"branch-count-reg",&flag_branch_on_count_reg, 1,
923 "Replace add,compare,branch with branch on count reg"},
924 {"pic", &flag_pic, 1,
925 "Generate position independent code, if possible"},
926 {"PIC", &flag_pic, 2, ""},
927 {"exceptions", &flag_exceptions, 1,
928 "Enable exception handling" },
929 {"new-exceptions", &flag_new_exceptions, 1,
930 "Use the new model for exception handling" },
931 {"unwind-tables", &flag_unwind_tables, 1,
932 "Just generate unwind tables for exception handling" },
933 {"sjlj-exceptions", &exceptions_via_longjmp, 1,
934 "Use setjmp/longjmp to handle exceptions" },
935 {"asynchronous-exceptions", &asynchronous_exceptions, 1,
936 "Support asynchronous exceptions" },
937 {"profile-arcs", &profile_arc_flag, 1,
938 "Insert arc based program profiling code" },
939 {"test-coverage", &flag_test_coverage, 1,
940 "Create data files needed by gcov" },
941 {"branch-probabilities", &flag_branch_probabilities, 1,
942 "Use profiling information for branch probabilities" },
943 {"reorder-blocks", &flag_reorder_blocks, 1,
944 "Reorder basic blocks to improve code placement" },
945 {"fast-math", &flag_fast_math, 1,
946 "Improve FP speed by violating ANSI & IEEE rules" },
947 {"common", &flag_no_common, 0,
948 "Do not put unitialised globals in the common section" },
949 {"inhibit-size-directive", &flag_inhibit_size_directive, 1,
950 "Do not generate .size directives" },
951 {"function-sections", &flag_function_sections, 1,
952 "place each function into its own section" },
953 {"data-sections", &flag_data_sections, 1,
954 "place data items into their own section" },
955 {"verbose-asm", &flag_verbose_asm, 1,
956 "Add extra commentry to assembler output"},
957 {"gnu-linker", &flag_gnu_linker, 1,
958 "Output GNU ld formatted global initialisers"},
959 {"regmove", &flag_regmove, 1,
960 "Enables a register move optimisation"},
961 {"optimize-register-move", &flag_regmove, 1,
962 "Do the full regmove optimization pass"},
963 {"pack-struct", &flag_pack_struct, 1,
964 "Pack structure members together without holes" },
965 {"stack-check", &flag_stack_check, 1,
966 "Insert stack checking code into the program" },
967 {"argument-alias", &flag_argument_noalias, 0,
968 "Specify that arguments may alias each other & globals"},
969 {"argument-noalias", &flag_argument_noalias, 1,
970 "Assume arguments may alias globals but not each other"},
971 {"argument-noalias-global", &flag_argument_noalias, 2,
972 "Assume arguments do not alias each other or globals" },
973 {"strict-aliasing", &flag_strict_aliasing, 1,
974 "Assume strict aliasing rules apply" },
975 {"align-loops", &align_loops, 0,
976 "Align the start of loops" },
977 {"align-jumps", &align_jumps, 0,
978 "Align labels which are only reached by jumping" },
979 {"align-labels", &align_labels, 0,
980 "Align all labels" },
981 {"align-functions", &align_functions, 0,
982 "Align the start of functions" },
983 {"check-memory-usage", &flag_check_memory_usage, 1,
984 "Generate code to check every memory access" },
985 {"prefix-function-name", &flag_prefix_function_name, 1,
986 "Add a prefix to all function names" },
987 {"dump-unnumbered", &flag_dump_unnumbered, 1,
988 "Suppress output of instruction numbers and line number notes in debugging dumps"},
989 {"instrument-functions", &flag_instrument_function_entry_exit, 1,
990 "Instrument function entry/exit with profiling calls"},
991 {"leading-underscore", &flag_leading_underscore, 1,
992 "External symbols have a leading underscore" },
993 {"ident", &flag_no_ident, 0,
994 "Process #ident directives"},
995 { "peephole2", &flag_peephole2, 1,
996 "Enables an rtl peephole pass run before sched2" },
997 {"math-errno", &flag_errno_math, 1,
998 "Set errno after built-in math functions"},
999 {"bounded-pointers", &flag_bounded_pointers, 1,
1000 "Compile pointers as triples: value, base & end" },
1001 {"bounds-check", &flag_bounds_check, 1,
1002 "Generate code to check bounds before dereferencing pointers and arrays" }
1005 #define NUM_ELEM(a) (sizeof (a) / sizeof ((a)[0]))
1007 /* Table of language-specific options. */
1009 static struct lang_opt
1011 const char * option;
1012 const char * description;
1014 documented_lang_options[] =
1016 /* In order not to overload the --help output, the convention
1017 used here is to only describe those options which are not
1018 enabled by default. */
1020 { "-ansi", "Compile just for ANSI C" },
1021 { "-fallow-single-precision",
1022 "Do not promote floats to double if using -traditional" },
1023 { "-std= ", "Determine language standard"},
1025 { "-fsigned-bitfields", "" },
1026 { "-funsigned-bitfields","Make bitfields by unsigned by default" },
1027 { "-fno-signed-bitfields", "" },
1028 { "-fno-unsigned-bitfields","" },
1029 { "-fsigned-char", "Make 'char' be signed by default"},
1030 { "-funsigned-char", "Make 'char' be unsigned by default"},
1031 { "-fno-signed-char", "" },
1032 { "-fno-unsigned-char", "" },
1034 { "-ftraditional", "" },
1035 { "-traditional", "Attempt to support traditional K&R style C"},
1036 { "-fnotraditional", "" },
1037 { "-fno-traditional", "" },
1040 { "-fno-asm", "Do not recognise the 'asm' keyword" },
1041 { "-fbuiltin", "" },
1042 { "-fno-builtin", "Do not recognise any built in functions" },
1043 { "-fhosted", "Assume normal C execution environment" },
1044 { "-fno-hosted", "" },
1046 "Assume that standard libraries & main might not exist" },
1047 { "-fno-freestanding", "" },
1048 { "-fcond-mismatch", "Allow different types as args of ? operator"},
1049 { "-fno-cond-mismatch", "" },
1050 { "-fdollars-in-identifiers", "Allow the use of $ inside identifiers" },
1051 { "-fno-dollars-in-identifiers", "" },
1052 { "-fpreprocessed", "" },
1053 { "-fno-preprocessed", "" },
1054 { "-fshort-double", "Use the same size for double as for float" },
1055 { "-fno-short-double", "" },
1056 { "-fshort-enums", "Use the smallest fitting integer to hold enums"},
1057 { "-fno-short-enums", "" },
1058 { "-fshort-wchar", "Override the underlying type for wchar_t to `unsigned short'" },
1059 { "-fno-short-wchar", "" },
1061 { "-Wall", "Enable most warning messages" },
1062 { "-Wbad-function-cast",
1063 "Warn about casting functions to incompatible types" },
1064 { "-Wno-bad-function-cast", "" },
1065 { "-Wmissing-noreturn",
1066 "Warn about functions which might be candidates for attribute noreturn" },
1067 { "-Wno-missing-noreturn", "" },
1068 { "-Wcast-qual", "Warn about casts which discard qualifiers"},
1069 { "-Wno-cast-qual", "" },
1070 { "-Wchar-subscripts", "Warn about subscripts whose type is 'char'"},
1071 { "-Wno-char-subscripts", "" },
1072 { "-Wcomment", "Warn if nested comments are detected" },
1073 { "-Wno-comment", "" },
1074 { "-Wcomments", "Warn if nested comments are detected" },
1075 { "-Wno-comments", "" },
1076 { "-Wconversion", "Warn about possibly confusing type conversions" },
1077 { "-Wno-conversion", "" },
1078 { "-Wformat", "Warn about printf format anomalies" },
1079 { "-Wno-format", "" },
1080 { "-Wimplicit-function-declaration",
1081 "Warn about implicit function declarations" },
1082 { "-Wno-implicit-function-declaration", "" },
1083 { "-Werror-implicit-function-declaration", "" },
1084 { "-Wimplicit-int", "Warn when a declaration does not specify a type" },
1085 { "-Wno-implicit-int", "" },
1086 { "-Wimplicit", "" },
1087 { "-Wno-implicit", "" },
1088 { "-Wimport", "Warn about the use of the #import directive" },
1089 { "-Wno-import", "" },
1090 { "-Wlong-long","" },
1091 { "-Wno-long-long", "Do not warn about using 'long long' when -pedantic" },
1092 { "-Wmain", "Warn about suspicious declarations of main" },
1093 { "-Wno-main", "" },
1094 { "-Wmissing-braces",
1095 "Warn about possibly missing braces around initialisers" },
1096 { "-Wno-missing-braces", "" },
1097 { "-Wmissing-declarations",
1098 "Warn about global funcs without previous declarations"},
1099 { "-Wno-missing-declarations", "" },
1100 { "-Wmissing-prototypes", "Warn about global funcs without prototypes" },
1101 { "-Wno-missing-prototypes", "" },
1102 { "-Wmultichar", "Warn about use of multicharacter literals"},
1103 { "-Wno-multichar", "" },
1104 { "-Wnested-externs", "Warn about externs not at file scope level" },
1105 { "-Wno-nested-externs", "" },
1106 { "-Wparentheses", "Warn about possible missing parentheses" },
1107 { "-Wno-parentheses", "" },
1108 { "-Wpointer-arith", "Warn about function pointer arithmetic" },
1109 { "-Wno-pointer-arith", "" },
1110 { "-Wredundant-decls",
1111 "Warn about multiple declarations of the same object" },
1112 { "-Wno-redundant-decls", "" },
1113 { "-Wsign-compare", "Warn about signed/unsigned comparisons" },
1114 { "-Wno-sign-compare", "" },
1115 { "-Wfloat-equal", "Warn about testing equality of floating point numbers" },
1116 { "-Wno-float-equal", "" },
1117 { "-Wunknown-pragmas", "Warn about unrecognised pragmas" },
1118 { "-Wno-unknown-pragmas", "" },
1119 { "-Wstrict-prototypes", "Warn about non-prototyped function decls" },
1120 { "-Wno-strict-prototypes", "" },
1121 { "-Wtraditional", "Warn about constructs whose meaning change in ANSI C"},
1122 { "-Wno-traditional", "" },
1123 { "-Wtrigraphs", "Warn when trigraphs are encountered" },
1124 { "-Wno-trigraphs", "" },
1126 { "-Wno-undef", "" },
1127 { "-Wwrite-strings", "Mark strings as 'const char *'"},
1128 { "-Wno-write-strings", "" },
1130 #define DEFINE_LANG_NAME(NAME) { NULL, NAME },
1132 /* These are for Objective C. */
1133 DEFINE_LANG_NAME ("Objective C")
1135 { "-lang-objc", "" },
1136 { "-gen-decls", "Dump decls to a .decl file" },
1137 { "-fgnu-runtime", "Generate code for GNU runtime environment" },
1138 { "-fno-gnu-runtime", "" },
1139 { "-fnext-runtime", "Generate code for NeXT runtime environment" },
1140 { "-fno-next-runtime", "" },
1141 { "-Wselector", "Warn if a selector has multiple methods" },
1142 { "-Wno-selector", "" },
1143 { "-Wprotocol", "" },
1144 { "-Wno-protocol", "Do not warn if inherited methods are unimplemented"},
1145 { "-print-objc-runtime-info",
1146 "Generate C header of platform specific features" },
1148 #include "options.h"
1152 /* Here is a table, controlled by the tm.h file, listing each -m switch
1153 and which bits in `target_switches' it should set or clear.
1154 If VALUE is positive, it is bits to set.
1155 If VALUE is negative, -VALUE is bits to clear.
1156 (The sign bit is not used so there is no confusion.) */
1162 const char * description;
1164 target_switches [] = TARGET_SWITCHES;
1166 /* This table is similar, but allows the switch to have a value. */
1168 #ifdef TARGET_OPTIONS
1171 const char * prefix;
1172 const char ** variable;
1173 const char * description;
1175 target_options [] = TARGET_OPTIONS;
1178 /* Options controlling warnings */
1180 /* Don't print warning messages. -w. */
1182 int inhibit_warnings = 0;
1184 /* Print various extra warnings. -W. */
1186 int extra_warnings = 0;
1188 /* Treat warnings as errors. -Werror. */
1190 int warnings_are_errors = 0;
1192 /* Nonzero to warn about unused local variables. */
1196 /* Nonzero to warn about code which is never reached. */
1198 int warn_notreached;
1200 /* Nonzero to warn about variables used before they are initialized. */
1202 int warn_uninitialized;
1204 /* Nonzero means warn about all declarations which shadow others. */
1208 /* Warn if a switch on an enum fails to have a case for every enum value. */
1212 /* Nonzero means warn about function definitions that default the return type
1213 or that use a null return and have a return-type other than void. */
1215 int warn_return_type;
1217 /* Nonzero means warn about pointer casts that increase the required
1218 alignment of the target type (and might therefore lead to a crash
1219 due to a misaligned access). */
1221 int warn_cast_align;
1223 /* Nonzero means warn about any identifiers that match in the first N
1224 characters. The value N is in `id_clash_len'. */
1227 unsigned id_clash_len;
1229 /* Nonzero means warn about any objects definitions whose size is larger
1230 than N bytes. Also want about function definitions whose returned
1231 values are larger than N bytes. The value N is in `larger_than_size'. */
1233 int warn_larger_than;
1234 unsigned larger_than_size;
1236 /* Nonzero means warn if inline function is too large. */
1240 /* Warn if a function returns an aggregate,
1241 since there are often incompatible calling conventions for doing this. */
1243 int warn_aggregate_return;
1245 /* Warn if packed attribute on struct is unnecessary and inefficient. */
1249 /* Warn when gcc pads a structure to an alignment boundary. */
1253 /* Likewise for -W. */
1255 lang_independent_options W_options[] =
1257 {"unused", &warn_unused, 1, "Warn when a variable is unused" },
1258 {"error", &warnings_are_errors, 1, ""},
1259 {"shadow", &warn_shadow, 1, "Warn when one local variable shadows another" },
1260 {"switch", &warn_switch, 1,
1261 "Warn about enumerated switches missing a specific case" },
1262 {"aggregate-return", &warn_aggregate_return, 1,
1263 "Warn about returning structures, unions or arrays" },
1264 {"cast-align", &warn_cast_align, 1,
1265 "Warn about pointer casts which increase alignment" },
1266 {"unreachable-code", &warn_notreached, 1,
1267 "Warn about code that will never be executed" },
1268 {"uninitialized", &warn_uninitialized, 1,
1269 "Warn about unitialized automatic variables"},
1270 {"inline", &warn_inline, 1,
1271 "Warn when an inlined function cannot be inlined"},
1272 {"packed", &warn_packed, 1,
1273 "Warn when the packed attribute has no effect on struct layout"},
1274 {"padded", &warn_padded, 1,
1275 "Warn when padding is required to align struct members"}
1278 /* Output files for assembler code (real compiler output)
1279 and debugging dumps. */
1282 FILE *aux_info_file;
1283 FILE *rtl_dump_file = NULL;
1285 /* Decode the string P as an integral parameter.
1286 If the string is indeed an integer return its numeric value else
1287 issue an Invalid Option error for the option PNAME and return DEFVAL.
1288 If PNAME is zero just return DEFVAL, do not call error. */
1291 read_integral_parameter (p, pname, defval)
1296 const char *endp = p;
1300 if (*endp >= '0' && *endp <= '9')
1309 error ("Invalid option `%s'", pname);
1317 /* Time accumulators, to count the total time spent in various passes. */
1321 int integration_time;
1327 int branch_prob_time;
1332 int local_alloc_time;
1333 int global_alloc_time;
1338 int reorder_blocks_time;
1339 int shorten_branch_time;
1347 /* Return time used so far, in microseconds. */
1357 #else /* not BeOS */
1358 #if defined (_WIN32) && !defined (__CYGWIN__)
1362 return (clock() * 1000);
1363 #else /* not _WIN32 */
1369 tick = 1000000 / sysconf(_SC_CLK_TCK);
1371 return (tms.tms_utime + tms.tms_stime) * tick;
1377 # if HAVE_SYSCONF && defined _SC_CLK_TCK
1378 # define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
1381 # define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
1383 # define TICKS_PER_SECOND HZ /* traditional UNIX */
1387 return (tms.tms_utime + tms.tms_stime) * (1000000 / TICKS_PER_SECOND);
1392 struct rusage rusage;
1393 getrusage (0, &rusage);
1394 return (rusage.ru_utime.tv_sec * 1000000 + rusage.ru_utime.tv_usec
1395 + rusage.ru_stime.tv_sec * 1000000 + rusage.ru_stime.tv_usec);
1402 int proc_system_time;
1403 int child_user_time;
1404 int child_system_time;
1406 times ((void *) &vms_times);
1407 return (vms_times.proc_user_time + vms_times.proc_system_time) * 10000;
1411 #endif /* _SC_CLK_TCK */
1413 #endif /* __BEOS__ */
1416 #define TIMEVAR(VAR, BODY) \
1417 do { int otime = get_run_time (); BODY; VAR += get_run_time () - otime; } while (0)
1420 print_time (str, total)
1425 "time in %s: %d.%06d (%.0f%%)\n",
1426 str, total / 1000000, total % 1000000,
1427 (double)total / (double)all_time * 100.0);
1430 /* This is the default decl_printable_name function. */
1433 decl_name (decl, verbosity)
1435 int verbosity ATTRIBUTE_UNUSED;
1437 return IDENTIFIER_POINTER (DECL_NAME (decl));
1440 /* Mark P for GC. Also mark main_input_filename and input_filename. */
1445 struct file_stack *stack = *(struct file_stack **)p;
1447 /* We're only called for input_file_stack, so we can mark the current
1448 input_filename here as well. */
1449 ggc_mark_string (main_input_filename);
1450 ggc_mark_string (input_filename);
1454 ggc_mark_string (stack->name);
1455 stack = stack->next;
1460 /* This calls abort and is used to avoid problems when abort if a macro.
1461 It is used when we need to pass the address of abort. */
1469 /* When `malloc.c' is compiled with `rcheck' defined,
1470 it calls this function to report clobberage. */
1474 const char * s ATTRIBUTE_UNUSED;
1479 /* Return the logarithm of X, base 2, considering X unsigned,
1480 if X is a power of 2. Otherwise, returns -1.
1482 This should be used via the `exact_log2' macro. */
1486 register unsigned HOST_WIDE_INT x;
1488 register int log = 0;
1489 /* Test for 0 or a power of 2. */
1490 if (x == 0 || x != (x & -x))
1492 while ((x >>= 1) != 0)
1497 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1498 If X is 0, return -1.
1500 This should be used via the floor_log2 macro. */
1504 register unsigned HOST_WIDE_INT x;
1506 register int log = -1;
1513 static int float_handler_set;
1515 jmp_buf float_handler;
1517 /* Signals actually come here. */
1520 float_signal (signo)
1521 /* If this is missing, some compilers complain. */
1522 int signo ATTRIBUTE_UNUSED;
1524 if (float_handled == 0)
1526 #if defined (USG) || defined (hpux)
1527 signal (SIGFPE, float_signal); /* re-enable the signal catcher */
1530 signal (SIGFPE, float_signal);
1531 longjmp (float_handler, 1);
1534 /* Specify where to longjmp to when a floating arithmetic error happens.
1535 If HANDLER is 0, it means don't handle the errors any more. */
1538 set_float_handler (handler)
1541 float_handled = (handler != 0);
1543 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1545 if (float_handled && ! float_handler_set)
1547 signal (SIGFPE, float_signal);
1548 float_handler_set = 1;
1552 /* This is a wrapper function for code which might elicit an
1553 arithmetic exception. That code should be passed in as a function
1554 pointer FN, and one argument DATA. DATA is usually a struct which
1555 contains the real input and output for function FN. This function
1556 returns 0 (failure) if longjmp was called (i.e. an exception
1557 occured.) It returns 1 (success) otherwise. */
1560 do_float_handler (fn, data)
1561 void (*fn) PARAMS ((PTR));
1568 /* We got here via longjmp() caused by an exception in function fn() */
1569 set_float_handler (NULL);
1573 set_float_handler (buf);
1575 set_float_handler (NULL);
1579 /* Specify, in HANDLER, where to longjmp to when a floating arithmetic
1580 error happens, pushing the previous specification into OLD_HANDLER.
1581 Return an indication of whether there was a previous handler in effect. */
1584 push_float_handler (handler, old_handler)
1585 jmp_buf handler, old_handler;
1587 int was_handled = float_handled;
1591 memcpy ((char *) old_handler, (char *) float_handler,
1592 sizeof (float_handler));
1594 memcpy ((char *) float_handler, (char *) handler, sizeof (float_handler));
1598 /* Restore the previous specification of whether and where to longjmp to
1599 when a floating arithmetic error happens. */
1602 pop_float_handler (handled, handler)
1606 float_handled = handled;
1608 bcopy ((char *) handler, (char *) float_handler, sizeof (float_handler));
1611 /* Handler for SIGPIPE. */
1615 /* If this is missing, some compilers complain. */
1616 int signo ATTRIBUTE_UNUSED;
1618 fatal ("output pipe has been closed");
1621 /* Strip off a legitimate source ending from the input string NAME of
1622 length LEN. Rather than having to know the names used by all of
1623 our front ends, we strip off an ending of a period followed by
1624 up to five characters. (Java uses ".class".) */
1627 strip_off_ending (name, len)
1632 for (i = 2; i < 6 && len > i; i++)
1634 if (name[len - i] == '.')
1636 name[len - i] = '\0';
1642 /* Output a quoted string. */
1645 output_quoted_string (asm_file, string)
1649 #ifdef OUTPUT_QUOTED_STRING
1650 OUTPUT_QUOTED_STRING (asm_file, string);
1654 putc ('\"', asm_file);
1655 while ((c = *string++) != 0)
1657 if (c == '\"' || c == '\\')
1658 putc ('\\', asm_file);
1661 putc ('\"', asm_file);
1665 /* Output a file name in the form wanted by System V. */
1668 output_file_directive (asm_file, input_name)
1670 const char *input_name;
1672 int len = strlen (input_name);
1673 const char *na = input_name + len;
1675 /* NA gets INPUT_NAME sans directory names. */
1676 while (na > input_name)
1680 #ifdef DIR_SEPARATOR
1681 if (na[-1] == DIR_SEPARATOR)
1687 #ifdef ASM_OUTPUT_MAIN_SOURCE_FILENAME
1688 ASM_OUTPUT_MAIN_SOURCE_FILENAME (asm_file, na);
1690 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1691 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1693 fprintf (asm_file, "\t.file\t");
1694 output_quoted_string (asm_file, na);
1695 fputc ('\n', asm_file);
1700 #ifdef ASM_IDENTIFY_LANGUAGE
1701 /* Routine to build language identifier for object file. */
1703 output_lang_identify (asm_out_file)
1706 int len = strlen (lang_identify ()) + sizeof ("__gnu_compiled_") + 1;
1707 char *s = (char *) alloca (len);
1708 sprintf (s, "__gnu_compiled_%s", lang_identify ());
1709 ASM_OUTPUT_LABEL (asm_out_file, s);
1713 /* Routine to open a dump file. */
1715 open_dump_file (suffix, function_name)
1717 const char *function_name;
1724 dumpname = concat (dump_base_name, suffix, NULL);
1726 if (rtl_dump_file != NULL)
1727 fclose (rtl_dump_file);
1729 rtl_dump_file = fopen (dumpname, "a");
1731 if (rtl_dump_file == NULL)
1732 pfatal_with_name (dumpname);
1737 fprintf (rtl_dump_file, "\n;; Function %s\n\n", function_name);
1743 /* Routine to close a dump file. */
1745 close_dump_file (func, insns)
1746 void (*func) PARAMS ((FILE *, rtx));
1753 func (rtl_dump_file, insns);
1755 fflush (rtl_dump_file);
1756 fclose (rtl_dump_file);
1758 rtl_dump_file = NULL;
1764 /* Routine to dump rtl into a file. */
1766 dump_rtl (suffix, decl, func, insns)
1769 void (*func) PARAMS ((FILE *, rtx));
1772 open_dump_file (suffix, decl_printable_name (decl, 2));
1773 close_dump_file (func, insns);
1776 /* Routine to empty a dump file. */
1778 clean_dump_file (suffix)
1781 char * const dumpname = concat (dump_base_name, suffix, NULL);
1783 rtl_dump_file = fopen (dumpname, "w");
1785 if (rtl_dump_file == NULL)
1786 pfatal_with_name (dumpname);
1790 fclose (rtl_dump_file);
1791 rtl_dump_file = NULL;
1796 /* Do any final processing required for the declarations in VEC, of
1797 which there are LEN. We write out inline functions and variables
1798 that have been deferred until this point, but which are required.
1799 Returns non-zero if anything was put out. */
1801 wrapup_global_declarations (vec, len)
1808 int output_something = 0;
1810 for (i = 0; i < len; i++)
1814 /* We're not deferring this any longer. */
1815 DECL_DEFER_OUTPUT (decl) = 0;
1817 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0
1818 && incomplete_decl_finalize_hook != 0)
1819 (*incomplete_decl_finalize_hook) (decl);
1822 /* Now emit any global variables or functions that we have been
1823 putting off. We need to loop in case one of the things emitted
1824 here references another one which comes earlier in the list. */
1828 for (i = 0; i < len; i++)
1832 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1835 /* Don't write out static consts, unless we still need them.
1837 We also keep static consts if not optimizing (for debugging),
1838 unless the user specified -fno-keep-static-consts.
1839 ??? They might be better written into the debug information.
1840 This is possible when using DWARF.
1842 A language processor that wants static constants to be always
1843 written out (even if it is not used) is responsible for
1844 calling rest_of_decl_compilation itself. E.g. the C front-end
1845 calls rest_of_decl_compilation from finish_decl.
1846 One motivation for this is that is conventional in some
1847 environments to write things like:
1848 static const char rcsid[] = "... version string ...";
1849 intending to force the string to be in the executable.
1851 A language processor that would prefer to have unneeded
1852 static constants "optimized away" would just defer writing
1853 them out until here. E.g. C++ does this, because static
1854 constants are often defined in header files.
1856 ??? A tempting alternative (for both C and C++) would be
1857 to force a constant to be written if and only if it is
1858 defined in a main file, as opposed to an include file. */
1860 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1861 && (! TREE_READONLY (decl)
1862 || TREE_PUBLIC (decl)
1863 || (!optimize && flag_keep_static_consts)
1864 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1867 rest_of_decl_compilation (decl, NULL_PTR, 1, 1);
1870 if (TREE_CODE (decl) == FUNCTION_DECL
1871 && DECL_INITIAL (decl) != 0
1872 && DECL_SAVED_INSNS (decl) != 0
1873 && (flag_keep_inline_functions
1874 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1875 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1878 temporary_allocation ();
1879 output_inline_function (decl);
1880 permanent_allocation (1);
1885 output_something = 1;
1889 return output_something;
1892 /* Issue appropriate warnings for the global declarations in VEC (of
1893 which there are LEN). Output debugging information for them. */
1895 check_global_declarations (vec, len)
1902 for (i = 0; i < len; i++)
1906 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1907 && ! TREE_ASM_WRITTEN (decl))
1908 /* Cancel the RTL for this decl so that, if debugging info
1909 output for global variables is still to come,
1910 this one will be omitted. */
1911 DECL_RTL (decl) = NULL;
1913 /* Warn about any function
1914 declared static but not defined.
1915 We don't warn about variables,
1916 because many programs have static variables
1917 that exist only to get some text into the object file. */
1918 if (TREE_CODE (decl) == FUNCTION_DECL
1920 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1921 && DECL_INITIAL (decl) == 0
1922 && DECL_EXTERNAL (decl)
1923 && ! DECL_ARTIFICIAL (decl)
1924 && ! TREE_PUBLIC (decl))
1926 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1927 pedwarn_with_decl (decl,
1928 "`%s' used but never defined");
1930 warning_with_decl (decl,
1931 "`%s' declared `static' but never defined");
1932 /* This symbol is effectively an "extern" declaration now. */
1933 TREE_PUBLIC (decl) = 1;
1934 assemble_external (decl);
1937 /* Warn about static fns or vars defined but not used,
1938 but not about inline functions or static consts
1939 since defining those in header files is normal practice. */
1941 && ((TREE_CODE (decl) == FUNCTION_DECL && ! DECL_INLINE (decl))
1942 || (TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
1943 && ! DECL_IN_SYSTEM_HEADER (decl)
1944 && ! DECL_EXTERNAL (decl)
1945 && ! TREE_PUBLIC (decl)
1946 && ! TREE_USED (decl)
1947 && (TREE_CODE (decl) == FUNCTION_DECL || ! DECL_REGISTER (decl))
1948 /* The TREE_USED bit for file-scope decls
1949 is kept in the identifier, to handle multiple
1950 external decls in different scopes. */
1951 && ! TREE_USED (DECL_NAME (decl)))
1952 warning_with_decl (decl, "`%s' defined but not used");
1954 #ifdef SDB_DEBUGGING_INFO
1955 /* The COFF linker can move initialized global vars to the end.
1956 And that can screw up the symbol ordering.
1957 By putting the symbols in that order to begin with,
1958 we avoid a problem. mcsun!unido!fauern!tumuc!pes@uunet.uu.net. */
1959 if (write_symbols == SDB_DEBUG && TREE_CODE (decl) == VAR_DECL
1960 && TREE_PUBLIC (decl) && DECL_INITIAL (decl)
1961 && ! DECL_EXTERNAL (decl)
1962 && DECL_RTL (decl) != 0)
1963 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
1965 /* Output COFF information for non-global
1966 file-scope initialized variables. */
1967 if (write_symbols == SDB_DEBUG
1968 && TREE_CODE (decl) == VAR_DECL
1969 && DECL_INITIAL (decl)
1970 && ! DECL_EXTERNAL (decl)
1971 && DECL_RTL (decl) != 0
1972 && GET_CODE (DECL_RTL (decl)) == MEM)
1973 TIMEVAR (symout_time, sdbout_toplevel_data (decl));
1974 #endif /* SDB_DEBUGGING_INFO */
1975 #ifdef DWARF_DEBUGGING_INFO
1976 /* Output DWARF information for file-scope tentative data object
1977 declarations, file-scope (extern) function declarations (which
1978 had no corresponding body) and file-scope tagged type declarations
1979 and definitions which have not yet been forced out. */
1981 if (write_symbols == DWARF_DEBUG
1982 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1983 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 1));
1985 #ifdef DWARF2_DEBUGGING_INFO
1986 /* Output DWARF2 information for file-scope tentative data object
1987 declarations, file-scope (extern) function declarations (which
1988 had no corresponding body) and file-scope tagged type declarations
1989 and definitions which have not yet been forced out. */
1991 if (write_symbols == DWARF2_DEBUG
1992 && (TREE_CODE (decl) != FUNCTION_DECL || !DECL_INITIAL (decl)))
1993 TIMEVAR (symout_time, dwarf2out_decl (decl));
1998 /* Compile an entire file of output from cpp, named NAME.
1999 Write a file of assembly output and various debugging dumps. */
2008 int name_specified = name != 0;
2010 if (dump_base_name == 0)
2011 dump_base_name = name ? name : "gccdump";
2015 integration_time = 0;
2021 branch_prob_time = 0;
2026 local_alloc_time = 0;
2027 global_alloc_time = 0;
2032 reorder_blocks_time = 0;
2033 shorten_branch_time = 0;
2039 /* Initialize data in various passes. */
2043 name = init_parse (name);
2044 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2045 || debug_info_level == DINFO_LEVEL_VERBOSE
2046 || flag_test_coverage
2047 || warn_notreached);
2049 init_decl_processing ();
2056 init_function_once ();
2057 init_stor_layout_once ();
2058 init_varasm_once ();
2060 /* The following initialization functions need to generate rtl, so
2061 provide a dummy function context for them. */
2062 init_dummy_function_start ();
2065 if (flag_caller_saves)
2066 init_caller_save ();
2067 expand_dummy_function_end ();
2069 /* If auxiliary info generation is desired, open the output file.
2070 This goes in the same directory as the source file--unlike
2071 all the other output files. */
2072 if (flag_gen_aux_info)
2074 aux_info_file = fopen (aux_info_file_name, "w");
2075 if (aux_info_file == 0)
2076 pfatal_with_name (aux_info_file_name);
2079 /* Clear the dump files. */
2081 clean_dump_file (".00.rtl");
2084 clean_dump_file (".01.jump");
2085 if (graph_dump_format != no_graph)
2086 clean_graph_dump_file (dump_base_name, ".01.jump");
2090 clean_dump_file (".02.cse");
2091 if (graph_dump_format != no_graph)
2092 clean_graph_dump_file (dump_base_name, ".02.cse");
2096 clean_dump_file (".03.addressof");
2097 if (graph_dump_format != no_graph)
2098 clean_graph_dump_file (dump_base_name, ".03.addressof");
2102 clean_dump_file (".04.gcse");
2103 if (graph_dump_format != no_graph)
2104 clean_graph_dump_file (dump_base_name, ".04.gcse");
2108 clean_dump_file (".05.loop");
2109 if (graph_dump_format != no_graph)
2110 clean_graph_dump_file (dump_base_name, ".05.loop");
2114 clean_dump_file (".06.cse2");
2115 if (graph_dump_format != no_graph)
2116 clean_graph_dump_file (dump_base_name, ".06.cse2");
2118 if (branch_prob_dump)
2120 clean_dump_file (".07.bp");
2121 if (graph_dump_format != no_graph)
2122 clean_graph_dump_file (dump_base_name, ".07.bp");
2126 clean_dump_file (".08.flow");
2127 if (graph_dump_format != no_graph)
2128 clean_graph_dump_file (dump_base_name, ".08.flow");
2132 clean_dump_file (".09.combine");
2133 if (graph_dump_format != no_graph)
2134 clean_graph_dump_file (dump_base_name, ".09.combine");
2138 clean_dump_file (".10.regmove");
2139 if (graph_dump_format != no_graph)
2140 clean_graph_dump_file (dump_base_name, ".10.regmove");
2142 #ifdef INSN_SCHEDULING
2145 clean_dump_file (".11.sched");
2146 if (graph_dump_format != no_graph)
2147 clean_graph_dump_file (dump_base_name, ".11.sched");
2152 clean_dump_file (".12.lreg");
2153 if (graph_dump_format != no_graph)
2154 clean_graph_dump_file (dump_base_name, ".12.lreg");
2156 if (global_reg_dump)
2158 clean_dump_file (".13.greg");
2159 if (graph_dump_format != no_graph)
2160 clean_graph_dump_file (dump_base_name, ".13.greg");
2164 clean_dump_file (".14.flow2");
2165 if (graph_dump_format != no_graph)
2166 clean_graph_dump_file (dump_base_name, ".14.flow2");
2168 #ifdef HAVE_peephole2
2171 clean_dump_file (".15.peephole2");
2172 if (graph_dump_format != no_graph)
2173 clean_graph_dump_file (dump_base_name, ".15.peephole2");
2176 #ifdef INSN_SCHEDULING
2179 clean_dump_file (".16.sched2");
2180 if (graph_dump_format != no_graph)
2181 clean_graph_dump_file (dump_base_name, ".16.sched2");
2184 if (reorder_blocks_dump)
2186 clean_dump_file (".bbro");
2187 if (graph_dump_format != no_graph)
2188 clean_graph_dump_file (dump_base_name, ".bbro");
2192 clean_dump_file (".17.jump2");
2193 if (graph_dump_format != no_graph)
2194 clean_graph_dump_file (dump_base_name, ".17.jump2");
2196 #ifdef MACHINE_DEPENDENT_REORG
2197 if (mach_dep_reorg_dump)
2199 clean_dump_file (".18.mach");
2200 if (graph_dump_format != no_graph)
2201 clean_graph_dump_file (dump_base_name, ".18.mach");
2207 clean_dump_file (".19.dbr");
2208 if (graph_dump_format != no_graph)
2209 clean_graph_dump_file (dump_base_name, ".19.dbr");
2215 clean_dump_file (".20.stack");
2216 if (graph_dump_format != no_graph)
2217 clean_graph_dump_file (dump_base_name, ".20.stack");
2221 /* Open assembler code output file. */
2223 if (flag_syntax_only)
2224 asm_out_file = NULL;
2227 if (! name_specified && asm_file_name == 0)
2228 asm_out_file = stdout;
2231 if (asm_file_name == 0)
2233 int len = strlen (dump_base_name);
2234 char *dumpname = (char *) xmalloc (len + 6);
2235 memcpy (dumpname, dump_base_name, len + 1);
2236 strip_off_ending (dumpname, len);
2237 strcat (dumpname, ".s");
2238 asm_file_name = dumpname;
2240 if (!strcmp (asm_file_name, "-"))
2241 asm_out_file = stdout;
2243 asm_out_file = fopen (asm_file_name, "w");
2244 if (asm_out_file == 0)
2245 pfatal_with_name (asm_file_name);
2248 #ifdef IO_BUFFER_SIZE
2249 setvbuf (asm_out_file, (char *) xmalloc (IO_BUFFER_SIZE),
2250 _IOFBF, IO_BUFFER_SIZE);
2255 name = ggc_alloc_string (name, strlen (name));
2256 input_filename = name;
2258 /* Put an entry on the input file stack for the main input file. */
2260 = (struct file_stack *) xmalloc (sizeof (struct file_stack));
2261 input_file_stack->next = 0;
2262 input_file_stack->name = input_filename;
2264 /* Perform language-specific initialization.
2265 This may set main_input_filename. */
2268 /* If the input doesn't start with a #line, use the input name
2269 as the official input file name. */
2270 if (main_input_filename == 0)
2271 main_input_filename = name;
2273 if (flag_syntax_only)
2275 write_symbols = NO_DEBUG;
2277 profile_block_flag = 0;
2281 ASM_FILE_START (asm_out_file);
2283 #ifdef ASM_COMMENT_START
2284 if (flag_verbose_asm)
2286 /* Print the list of options in effect. */
2287 print_version (asm_out_file, ASM_COMMENT_START);
2288 print_switch_values (asm_out_file, 0, MAX_LINE,
2289 ASM_COMMENT_START, " ", "\n");
2290 /* Add a blank line here so it appears in assembler output but not
2292 fprintf (asm_out_file, "\n");
2296 /* Output something to inform GDB that this compilation was by GCC. */
2297 #ifndef ASM_IDENTIFY_GCC
2298 fprintf (asm_out_file, "gcc2_compiled.:\n");
2300 ASM_IDENTIFY_GCC (asm_out_file);
2303 /* Output something to identify which front-end produced this file. */
2304 #ifdef ASM_IDENTIFY_LANGUAGE
2305 ASM_IDENTIFY_LANGUAGE (asm_out_file);
2307 } /* ! flag_syntax_only */
2309 #ifndef ASM_OUTPUT_SECTION_NAME
2310 if (flag_function_sections)
2312 warning ("-ffunction-sections not supported for this target.");
2313 flag_function_sections = 0;
2315 if (flag_data_sections)
2317 warning ("-fdata-sections not supported for this target.");
2318 flag_data_sections = 0;
2322 if (flag_function_sections
2323 && (profile_flag || profile_block_flag))
2325 warning ("-ffunction-sections disabled; it makes profiling impossible.");
2326 flag_function_sections = 0;
2329 #ifndef OBJECT_FORMAT_ELF
2330 if (flag_function_sections && write_symbols != NO_DEBUG)
2331 warning ("-ffunction-sections may affect debugging on some targets.");
2334 /* ??? Note: There used to be a conditional here
2335 to call assemble_zeros without fail if DBX_DEBUGGING_INFO is defined.
2336 This was to guarantee separation between gcc_compiled. and
2337 the first function, for the sake of dbx on Suns.
2338 However, having the extra zero here confused the Emacs
2339 code for unexec, and might confuse other programs too.
2340 Therefore, I took out that change.
2341 In future versions we should find another way to solve
2342 that dbx problem. -- rms, 23 May 93. */
2344 /* Don't let the first function fall at the same address
2345 as gcc_compiled., if profiling. */
2346 if (profile_flag || profile_block_flag)
2348 /* It's best if we can write a nop here since some
2349 assemblers don't tolerate zeros in the text section. */
2350 output_asm_insn (get_insn_template (CODE_FOR_nop, NULL), NULL_PTR);
2353 /* If dbx symbol table desired, initialize writing it
2354 and output the predefined types. */
2355 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2356 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2357 TIMEVAR (symout_time, dbxout_init (asm_out_file, main_input_filename,
2360 #ifdef SDB_DEBUGGING_INFO
2361 if (write_symbols == SDB_DEBUG)
2362 TIMEVAR (symout_time, sdbout_init (asm_out_file, main_input_filename,
2365 #ifdef DWARF_DEBUGGING_INFO
2366 if (write_symbols == DWARF_DEBUG)
2367 TIMEVAR (symout_time, dwarfout_init (asm_out_file, main_input_filename));
2369 #ifdef DWARF2_UNWIND_INFO
2370 if (dwarf2out_do_frame ())
2371 dwarf2out_frame_init ();
2373 #ifdef DWARF2_DEBUGGING_INFO
2374 if (write_symbols == DWARF2_DEBUG)
2375 TIMEVAR (symout_time, dwarf2out_init (asm_out_file, main_input_filename));
2378 /* Initialize yet another pass. */
2380 init_final (main_input_filename);
2381 init_branch_prob (dump_base_name);
2383 start_time = get_run_time ();
2385 /* Call the parser, which parses the entire file
2386 (calling rest_of_compilation for each function). */
2388 if (yyparse () != 0)
2390 if (errorcount == 0)
2391 fnotice (stderr, "Errors detected in input file (your bison.simple is out of date)\n");
2393 /* In case there were missing closebraces,
2394 get us back to the global binding level. */
2395 while (! global_bindings_p ())
2399 /* Compilation is now finished except for writing
2400 what's left of the symbol table output. */
2402 parse_time += get_run_time () - start_time;
2404 parse_time -= integration_time;
2405 parse_time -= varconst_time;
2407 if (flag_syntax_only)
2410 globals = getdecls ();
2412 /* Really define vars that have had only a tentative definition.
2413 Really output inline functions that must actually be callable
2414 and have not been output so far. */
2417 int len = list_length (globals);
2418 tree *vec = (tree *) xmalloc (sizeof (tree) * len);
2422 /* Process the decls in reverse order--earliest first.
2423 Put them into VEC from back to front, then take out from front. */
2425 for (i = 0, decl = globals; i < len; i++, decl = TREE_CHAIN (decl))
2426 vec[len - i - 1] = decl;
2428 wrapup_global_declarations (vec, len);
2430 /* This must occur after the loop to output deferred functions. Else
2431 the profiler initializer would not be emitted if all the functions
2432 in this compilation unit were deferred.
2434 output_func_start_profiler can not cause any additional functions or
2435 data to need to be output, so it need not be in the deferred function
2437 output_func_start_profiler ();
2439 /* Now that all possible functions have been output, we can dump
2440 the exception table. */
2442 output_exception_table ();
2444 check_global_declarations (vec, len);
2450 /* Write out any pending weak symbol declarations. */
2454 /* Do dbx symbols */
2455 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2456 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2457 TIMEVAR (symout_time,
2459 dbxout_finish (asm_out_file, main_input_filename);
2463 #ifdef DWARF_DEBUGGING_INFO
2464 if (write_symbols == DWARF_DEBUG)
2465 TIMEVAR (symout_time,
2471 #ifdef DWARF2_UNWIND_INFO
2472 if (dwarf2out_do_frame ())
2473 dwarf2out_frame_finish ();
2476 #ifdef DWARF2_DEBUGGING_INFO
2477 if (write_symbols == DWARF2_DEBUG)
2478 TIMEVAR (symout_time,
2480 dwarf2out_finish ();
2484 /* Output some stuff at end of file if nec. */
2486 end_final (dump_base_name);
2488 if (branch_prob_dump)
2489 open_dump_file (".07.bp", NULL);
2491 TIMEVAR (dump_time, end_branch_prob (rtl_dump_file));
2493 if (branch_prob_dump)
2494 close_dump_file (NULL, NULL_RTX);
2497 ASM_FILE_END (asm_out_file);
2501 /* Language-specific end of compilation actions. */
2505 /* Close the dump files. */
2507 if (flag_gen_aux_info)
2509 fclose (aux_info_file);
2511 unlink (aux_info_file_name);
2516 open_dump_file (".09.combine", NULL);
2517 TIMEVAR (dump_time, dump_combine_total_stats (rtl_dump_file));
2518 close_dump_file (NULL, NULL_RTX);
2521 /* Close non-debugging input and output files. Take special care to note
2522 whether fclose returns an error, since the pages might still be on the
2523 buffer chain while the file is open. */
2527 if (! flag_syntax_only
2528 && (ferror (asm_out_file) != 0 || fclose (asm_out_file) != 0))
2529 fatal_io_error (asm_file_name);
2531 /* Do whatever is necessary to finish printing the graphs. */
2532 if (graph_dump_format != no_graph)
2535 finish_graph_dump_file (dump_base_name, ".01.jump");
2537 finish_graph_dump_file (dump_base_name, ".02.cse");
2539 finish_graph_dump_file (dump_base_name, ".03.addressof");
2541 finish_graph_dump_file (dump_base_name, ".04.gcse");
2543 finish_graph_dump_file (dump_base_name, ".05.loop");
2545 finish_graph_dump_file (dump_base_name, ".06.cse2");
2546 if (branch_prob_dump)
2547 finish_graph_dump_file (dump_base_name, ".07.bp");
2549 finish_graph_dump_file (dump_base_name, ".08.flow");
2551 finish_graph_dump_file (dump_base_name, ".09.combine");
2553 finish_graph_dump_file (dump_base_name, ".10.regmove");
2554 #ifdef INSN_SCHEDULING
2556 finish_graph_dump_file (dump_base_name, ".11.sched");
2559 finish_graph_dump_file (dump_base_name, ".12.lreg");
2560 if (global_reg_dump)
2561 finish_graph_dump_file (dump_base_name, ".13.greg");
2563 finish_graph_dump_file (dump_base_name, ".14.flow2");
2564 #ifdef HAVE_peephole2
2566 finish_graph_dump_file (dump_base_name, ".15.peephole2");
2568 #ifdef INSN_SCHEDULING
2570 finish_graph_dump_file (dump_base_name, ".16.sched2");
2572 if (reorder_blocks_dump)
2573 finish_graph_dump_file (dump_base_name, ".bbro");
2575 finish_graph_dump_file (dump_base_name, ".17.jump2");
2576 #ifdef MACHINE_DEPENDENT_REORG
2577 if (mach_dep_reorg_dump)
2578 finish_graph_dump_file (dump_base_name, ".18.mach");
2582 finish_graph_dump_file (dump_base_name, ".19.dbr");
2586 finish_graph_dump_file (dump_base_name, ".20.stack");
2590 /* Free up memory for the benefit of leak detectors. */
2593 /* Print the times. */
2597 all_time = get_run_time ();
2599 fprintf (stderr,"\n");
2601 print_time ("parse", parse_time);
2602 print_time ("integration", integration_time);
2603 print_time ("jump", jump_time);
2604 print_time ("cse", cse_time);
2605 print_time ("gcse", gcse_time);
2606 print_time ("loop", loop_time);
2607 print_time ("cse2", cse2_time);
2608 print_time ("branch-prob", branch_prob_time);
2609 print_time ("flow", flow_time);
2610 print_time ("combine", combine_time);
2611 print_time ("regmove", regmove_time);
2612 #ifdef INSN_SCHEDULING
2613 print_time ("sched", sched_time);
2615 print_time ("local-alloc", local_alloc_time);
2616 print_time ("global-alloc", global_alloc_time);
2617 print_time ("flow2", flow2_time);
2618 #ifdef HAVE_peephole2
2619 print_time ("peephole2", peephole2_time);
2621 #ifdef INSN_SCHEDULING
2622 print_time ("sched2", sched2_time);
2625 print_time ("dbranch", dbr_sched_time);
2627 print_time ("bbro", reorder_blocks_time);
2628 print_time ("shorten-branch", shorten_branch_time);
2630 print_time ("stack-reg", stack_reg_time);
2632 print_time ("final", final_time);
2633 print_time ("varconst", varconst_time);
2634 print_time ("symout", symout_time);
2635 print_time ("dump", dump_time);
2637 print_time ("gc", gc_time);
2641 /* This is called from various places for FUNCTION_DECL, VAR_DECL,
2642 and TYPE_DECL nodes.
2644 This does nothing for local (non-static) variables, unless the
2645 variable is a register variable with an ASMSPEC. In that case, or
2646 if the variable is not an automatice, it sets up the RTL and
2647 outputs any assembler code (label definition, storage allocation
2648 and initialization).
2650 DECL is the declaration. If ASMSPEC is nonzero, it specifies
2651 the assembler symbol name to be used. TOP_LEVEL is nonzero
2652 if this declaration is not within a function. */
2655 rest_of_decl_compilation (decl, asmspec, top_level, at_end)
2657 const char *asmspec;
2661 /* Declarations of variables, and of functions defined elsewhere. */
2663 /* The most obvious approach, to put an #ifndef around where
2664 this macro is used, doesn't work since it's inside a macro call. */
2665 #ifndef ASM_FINISH_DECLARE_OBJECT
2666 #define ASM_FINISH_DECLARE_OBJECT(FILE, DECL, TOP, END)
2669 /* Forward declarations for nested functions are not "external",
2670 but we need to treat them as if they were. */
2671 if (TREE_STATIC (decl) || DECL_EXTERNAL (decl)
2672 || TREE_CODE (decl) == FUNCTION_DECL)
2673 TIMEVAR (varconst_time,
2675 make_decl_rtl (decl, asmspec, top_level);
2676 /* Initialized extern variable exists to be replaced
2677 with its value, or represents something that will be
2678 output in another file. */
2679 if (! (TREE_CODE (decl) == VAR_DECL
2680 && DECL_EXTERNAL (decl) && TREE_READONLY (decl)
2681 && DECL_INITIAL (decl) != 0
2682 && DECL_INITIAL (decl) != error_mark_node))
2683 /* Don't output anything
2684 when a tentative file-scope definition is seen.
2685 But at end of compilation, do output code for them. */
2686 if (! (! at_end && top_level
2687 && (DECL_INITIAL (decl) == 0
2688 || DECL_INITIAL (decl) == error_mark_node)))
2689 assemble_variable (decl, top_level, at_end, 0);
2690 if (decl == last_assemble_variable_decl)
2692 ASM_FINISH_DECLARE_OBJECT (asm_out_file, decl,
2696 else if (DECL_REGISTER (decl) && asmspec != 0)
2698 if (decode_reg_name (asmspec) >= 0)
2700 DECL_RTL (decl) = 0;
2701 make_decl_rtl (decl, asmspec, top_level);
2704 error ("invalid register name `%s' for register variable", asmspec);
2706 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2707 else if ((write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2708 && TREE_CODE (decl) == TYPE_DECL)
2709 TIMEVAR (symout_time, dbxout_symbol (decl, 0));
2711 #ifdef SDB_DEBUGGING_INFO
2712 else if (write_symbols == SDB_DEBUG && top_level
2713 && TREE_CODE (decl) == TYPE_DECL)
2714 TIMEVAR (symout_time, sdbout_symbol (decl, 0));
2718 /* Called after finishing a record, union or enumeral type. */
2721 rest_of_type_compilation (type, toplev)
2722 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO) || defined (SDB_DEBUGGING_INFO)
2726 tree type ATTRIBUTE_UNUSED;
2727 int toplev ATTRIBUTE_UNUSED;
2730 #if defined (DBX_DEBUGGING_INFO) || defined (XCOFF_DEBUGGING_INFO)
2731 if (write_symbols == DBX_DEBUG || write_symbols == XCOFF_DEBUG)
2732 TIMEVAR (symout_time, dbxout_symbol (TYPE_STUB_DECL (type), !toplev));
2734 #ifdef SDB_DEBUGGING_INFO
2735 if (write_symbols == SDB_DEBUG)
2736 TIMEVAR (symout_time, sdbout_symbol (TYPE_STUB_DECL (type), !toplev));
2740 /* DECL is an inline function, whose body is present, but which is not
2741 being output at this point. (We're putting that off until we need
2742 to do it.) If there are any actions that need to take place,
2743 including the emission of debugging information for the function,
2744 this is where they should go. This function may be called by
2745 language-dependent code for front-ends that do not even generate
2746 RTL for functions that don't need to be put out. */
2749 note_deferral_of_defined_inline_function (decl)
2750 tree decl ATTRIBUTE_UNUSED;
2752 #ifdef DWARF_DEBUGGING_INFO
2753 /* Generate the DWARF info for the "abstract" instance of a function
2754 which we may later generate inlined and/or out-of-line instances
2756 if (write_symbols == DWARF_DEBUG)
2758 /* The front-end may not have set CURRENT_FUNCTION_DECL, but the
2759 DWARF code expects it to be set in this case. Intuitively,
2760 DECL is the function we just finished defining, so setting
2761 CURRENT_FUNCTION_DECL is sensible. */
2762 tree saved_cfd = current_function_decl;
2763 current_function_decl = decl;
2765 /* Let the DWARF code do its work. */
2766 set_decl_abstract_flags (decl, 1);
2767 dwarfout_file_scope_decl (decl, 0);
2768 set_decl_abstract_flags (decl, 0);
2770 /* Reset CURRENT_FUNCTION_DECL. */
2771 current_function_decl = saved_cfd;
2776 /* This is called from finish_function (within yyparse)
2777 after each top-level definition is parsed.
2778 It is supposed to compile that function or variable
2779 and output the assembler code for it.
2780 After we return, the tree storage is freed. */
2783 rest_of_compilation (decl)
2787 int start_time = get_run_time ();
2790 int rebuild_label_notes_after_reload;
2792 /* When processing delayed functions, prepare_function_start() won't
2793 have been run to re-initialize it. */
2794 cse_not_expected = ! optimize;
2796 /* First, remove any notes we don't need. That will make iterating
2797 over the instruction sequence faster, and allow the garbage
2798 collector to reclaim the memory used by the notes. */
2799 remove_unncessary_notes ();
2801 /* In function-at-a-time mode, we do not attempt to keep the BLOCK
2802 tree in sensible shape. So, we just recalculate it here. */
2803 if (cfun->x_whole_function_mode_p)
2805 find_loop_tree_blocks ();
2806 unroll_block_trees ();
2809 /* If we are reconsidering an inline function
2810 at the end of compilation, skip the stuff for making it inline. */
2812 if (DECL_SAVED_INSNS (decl) == 0)
2818 /* If this is nested inside an inlined external function, pretend
2819 it was only declared. Since we cannot inline such functions,
2820 generating code for this one is not only not necessary but will
2821 confuse some debugging output writers. */
2822 for (parent = DECL_CONTEXT (current_function_decl);
2823 parent != NULL_TREE;
2824 parent = get_containing_scope (parent))
2825 if (TREE_CODE (parent) == FUNCTION_DECL
2826 && DECL_INLINE (parent) && DECL_EXTERNAL (parent))
2828 DECL_INITIAL (decl) = 0;
2829 goto exit_rest_of_compilation;
2832 /* If requested, consider whether to make this function inline. */
2833 if (DECL_INLINE (decl) || flag_inline_functions)
2834 TIMEVAR (integration_time,
2836 lose = function_cannot_inline_p (decl);
2837 if (lose || ! optimize)
2839 if (warn_inline && DECL_INLINE (decl))
2840 warning_with_decl (decl, lose);
2841 DECL_ABSTRACT_ORIGIN (decl) = 0;
2842 /* Don't really compile an extern inline function.
2843 If we can't make it inline, pretend
2844 it was only declared. */
2845 if (DECL_EXTERNAL (decl))
2847 DECL_INITIAL (decl) = 0;
2848 goto exit_rest_of_compilation;
2852 /* ??? Note that this has the effect of making it look
2853 like "inline" was specified for a function if we choose
2854 to inline it. This isn't quite right, but it's
2855 probably not worth the trouble to fix. */
2856 inlinable = DECL_INLINE (decl) = 1;
2859 insns = get_insns ();
2861 /* Dump the rtl code if we are dumping rtl. */
2865 open_dump_file (".00.rtl", decl_printable_name (decl, 2));
2867 if (DECL_SAVED_INSNS (decl))
2868 fprintf (rtl_dump_file, ";; (integrable)\n\n");
2870 close_dump_file (print_rtl, insns);
2873 /* If function is inline, and we don't yet know whether to
2874 compile it by itself, defer decision till end of compilation.
2875 finish_compilation will call rest_of_compilation again
2876 for those functions that need to be output. Also defer those
2877 functions that we are supposed to defer. */
2880 DECL_DEFER_OUTPUT (decl) = 1;
2882 if (DECL_DEFER_OUTPUT (decl)
2883 || (DECL_INLINE (decl)
2884 && ((! TREE_PUBLIC (decl) && ! TREE_ADDRESSABLE (decl)
2885 && ! flag_keep_inline_functions)
2886 || DECL_EXTERNAL (decl))))
2888 DECL_DEFER_OUTPUT (decl) = 1;
2890 /* If -Wreturn-type, we have to do a bit of compilation.
2891 However, if we just fall through we will call
2892 save_for_inline_copying() which results in excessive
2893 memory use. Instead, we just want to call
2894 jump_optimize() to figure out whether or not we can fall
2895 off the end of the function; we do the minimum amount of
2896 work necessary to make that safe. And, we set optimize
2897 to zero to keep jump_optimize from working too hard. */
2898 if (warn_return_type)
2900 int saved_optimize = optimize;
2902 find_exception_handler_labels ();
2903 jump_optimize (get_insns(), !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2904 !JUMP_AFTER_REGSCAN);
2905 optimize = saved_optimize;
2908 note_deferral_of_defined_inline_function (decl);
2909 TIMEVAR (integration_time, save_for_inline_nocopy (decl));
2910 DECL_SAVED_INSNS (decl)->inlinable = inlinable;
2911 goto exit_rest_of_compilation;
2914 /* If specified extern inline but we aren't inlining it, we are
2915 done. This goes for anything that gets here with DECL_EXTERNAL
2916 set, not just things with DECL_INLINE. */
2917 if (DECL_EXTERNAL (decl))
2918 goto exit_rest_of_compilation;
2921 /* Initialize some variables used by the optimizers. */
2922 init_function_for_compilation ();
2924 if (! DECL_DEFER_OUTPUT (decl))
2925 TREE_ASM_WRITTEN (decl) = 1;
2927 /* Now that integrate will no longer see our rtl, we need not distinguish
2928 between the return value of this function and the return value of called
2930 rtx_equal_function_value_matters = 0;
2932 /* Don't return yet if -Wreturn-type; we need to do jump_optimize. */
2933 if ((rtl_dump_and_exit || flag_syntax_only) && !warn_return_type)
2935 goto exit_rest_of_compilation;
2938 /* Emit code to get eh context, if needed. */
2942 /* If we are doing position-independent code generation, now
2943 is the time to output special prologues and epilogues.
2944 We do not want to do this earlier, because it just clutters
2945 up inline functions with meaningless insns. */
2950 /* From now on, allocate rtl in current_obstack, not in saveable_obstack.
2951 Note that that may have been done above, in save_for_inline_copying.
2952 The call to resume_temporary_allocation near the end of this function
2953 goes back to the usual state of affairs. This must be done after
2954 we've built up any unwinders for exception handling, and done
2955 the FINALIZE_PIC work, if necessary. */
2957 rtl_in_current_obstack ();
2959 insns = get_insns ();
2961 /* Copy any shared structure that should not be shared. */
2963 unshare_all_rtl (current_function_decl, insns);
2965 init_EXPR_INSN_LIST_cache ();
2967 #ifdef SETJMP_VIA_SAVE_AREA
2968 /* This must be performed before virutal register instantiation. */
2969 if (current_function_calls_alloca)
2970 optimize_save_area_alloca (insns);
2973 /* Instantiate all virtual registers. */
2975 instantiate_virtual_regs (current_function_decl, get_insns ());
2977 /* See if we have allocated stack slots that are not directly addressable.
2978 If so, scan all the insns and create explicit address computation
2979 for all references to such slots. */
2980 /* fixup_stack_slots (); */
2982 /* Find all the EH handlers. */
2983 find_exception_handler_labels ();
2986 open_dump_file (".01.jump", decl_printable_name (decl, 2));
2988 /* Always do one jump optimization pass to ensure that JUMP_LABEL fields
2989 are initialized and to compute whether control can drop off the end
2991 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
2992 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP, !JUMP_NOOP_MOVES,
2993 JUMP_AFTER_REGSCAN));
2995 /* Jump optimization, and the removal of NULL pointer checks, may
2996 have reduced the number of instructions substantially. CSE, and
2997 future passes, allocate arrays whose dimensions involve the maximum
2998 instruction UID, so if we can reduce the maximum UID we'll save big on
3000 renumber_insns (rtl_dump_file);
3002 /* Dump rtl code after jump, if we are doing that. */
3004 close_dump_file (print_rtl, insns);
3006 /* Now is when we stop if -fsyntax-only and -Wreturn-type. */
3007 if (rtl_dump_and_exit || flag_syntax_only || DECL_DEFER_OUTPUT (decl))
3008 goto exit_rest_of_compilation;
3010 /* Try to identify useless null pointer tests and delete them. */
3011 if (flag_delete_null_pointer_checks)
3012 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3017 /* Perform common subexpression elimination.
3018 Nonzero value from `cse_main' means that jumps were simplified
3019 and some code may now be unreachable, so do
3020 jump optimization again. */
3025 open_dump_file (".02.cse", decl_printable_name (decl, 2));
3027 TIMEVAR (cse_time, reg_scan (insns, max_reg_num (), 1));
3029 if (flag_thread_jumps)
3030 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 1));
3032 TIMEVAR (cse_time, tem = cse_main (insns, max_reg_num (),
3034 /* If we are not running the second CSE pass, then we are no longer
3035 expecting CSE to be run. */
3036 cse_not_expected = !flag_rerun_cse_after_loop;
3038 if (tem || optimize > 1)
3039 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3041 !JUMP_AFTER_REGSCAN));
3043 /* Run this after jump optmizations remove all the unreachable code
3044 so that unreachable code will not keep values live. */
3045 TIMEVAR (cse_time, delete_trivially_dead_insns (insns, max_reg_num ()));
3047 /* Try to identify useless null pointer tests and delete them. */
3048 if (flag_delete_null_pointer_checks)
3049 TIMEVAR (jump_time, delete_null_pointer_checks (get_insns ()));
3051 /* The second pass of jump optimization is likely to have
3052 removed a bunch more instructions. */
3053 renumber_insns (rtl_dump_file);
3055 /* Dump rtl code after cse, if we are doing that. */
3058 close_dump_file (print_rtl, insns);
3059 if (graph_dump_format != no_graph)
3060 print_rtl_graph_with_bb (dump_base_name, ".02.cse", insns);
3064 purge_addressof (insns);
3065 reg_scan (insns, max_reg_num (), 1);
3069 dump_rtl (".03.addressof", decl, print_rtl, insns);
3070 if (graph_dump_format != no_graph)
3071 print_rtl_graph_with_bb (dump_base_name, ".03.addressof", insns);
3077 /* Perform global cse. */
3079 if (optimize > 0 && flag_gcse)
3082 open_dump_file (".04.gcse", decl_printable_name (decl, 2));
3084 TIMEVAR (gcse_time, tem = gcse_main (insns, rtl_dump_file));
3086 /* If gcse altered any jumps, rerun jump optimizations to clean
3090 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3092 !JUMP_AFTER_REGSCAN));
3097 close_dump_file (print_rtl, insns);
3098 if (graph_dump_format != no_graph)
3099 print_rtl_graph_with_bb (dump_base_name, ".04.gcse", insns);
3105 /* Move constant computations out of loops. */
3110 open_dump_file (".05.loop", decl_printable_name (decl, 2));
3115 if (flag_rerun_loop_opt)
3117 /* We only want to perform unrolling once. */
3119 loop_optimize (insns, rtl_dump_file, 0, 0);
3122 /* The first call to loop_optimize makes some instructions
3123 trivially dead. We delete those instructions now in the
3124 hope that doing so will make the heuristics in loop work
3125 better and possibly speed up compilation. */
3126 delete_trivially_dead_insns (insns, max_reg_num ());
3128 /* The regscan pass is currently necessary as the alias
3129 analysis code depends on this information. */
3130 reg_scan (insns, max_reg_num (), 1);
3132 loop_optimize (insns, rtl_dump_file, flag_unroll_loops, 1);
3135 /* Dump rtl code after loop opt, if we are doing that. */
3139 close_dump_file (print_rtl, insns);
3140 if (graph_dump_format != no_graph)
3141 print_rtl_graph_with_bb (dump_base_name, ".05.loop", insns);
3148 /* ??? Well, nearly. If HAVE_conditional_arithmetic, jump_optimize
3149 has put off all if-conversion until "after CSE". If we put this
3150 off any longer we may miss out doing if-conversion entirely. */
3151 cse_not_expected = 1;
3156 open_dump_file (".06.cse2", decl_printable_name (decl, 2));
3158 if (flag_rerun_cse_after_loop)
3160 /* Running another jump optimization pass before the second
3161 cse pass sometimes simplifies the RTL enough to allow
3162 the second CSE pass to do a better job. Jump_optimize can change
3163 max_reg_num so we must rerun reg_scan afterwards.
3164 ??? Rework to not call reg_scan so often. */
3165 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3166 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3168 JUMP_AFTER_REGSCAN));
3170 TIMEVAR (cse2_time, reg_scan (insns, max_reg_num (), 0));
3171 TIMEVAR (cse2_time, tem = cse_main (insns, max_reg_num (),
3174 TIMEVAR (jump_time, jump_optimize (insns, !JUMP_CROSS_JUMP,
3176 !JUMP_AFTER_REGSCAN));
3179 if (flag_thread_jumps)
3181 /* This pass of jump threading straightens out code
3182 that was kinked by loop optimization. */
3183 TIMEVAR (jump_time, reg_scan (insns, max_reg_num (), 0));
3184 TIMEVAR (jump_time, thread_jumps (insns, max_reg_num (), 0));
3187 /* Dump rtl code after cse, if we are doing that. */
3190 close_dump_file (print_rtl, insns);
3191 if (graph_dump_format != no_graph)
3192 print_rtl_graph_with_bb (dump_base_name, ".06.cse2", insns);
3199 if (profile_arc_flag || flag_test_coverage || flag_branch_probabilities)
3201 if (branch_prob_dump)
3202 open_dump_file (".07.bp", decl_printable_name (decl, 2));
3207 branch_prob (insns, rtl_dump_file);
3210 if (branch_prob_dump)
3212 close_dump_file (print_rtl, insns);
3213 if (graph_dump_format != no_graph)
3214 print_rtl_graph_with_bb (dump_base_name, ".07.bp", insns);
3223 /* Print function header into flow dump now
3224 because doing the flow analysis makes some of the dump. */
3227 open_dump_file (".08.flow", decl_printable_name (decl, 2));
3229 /* Do control and data flow analysis; wrote some of the results to
3235 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3236 cleanup_cfg (insns);
3238 calculate_loop_depth (rtl_dump_file);
3239 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3242 if (warn_uninitialized || extra_warnings)
3244 uninitialized_vars_warning (DECL_INITIAL (decl));
3246 setjmp_args_warning ();
3249 /* Dump rtl after flow analysis. */
3253 close_dump_file (print_rtl_with_bb, insns);
3254 if (graph_dump_format != no_graph)
3255 print_rtl_graph_with_bb (dump_base_name, ".08.flow", insns);
3261 /* The first life analysis pass has finished. From now on we can not
3262 generate any new pseudos. */
3265 /* If -opt, try combining insns through substitution. */
3269 TIMEVAR (combine_time, combine_instructions (insns, max_reg_num ()));
3271 /* Dump rtl code after insn combination. */
3275 dump_rtl (".09.combine", decl, print_rtl_with_bb, insns);
3276 if (graph_dump_format != no_graph)
3277 print_rtl_graph_with_bb (dump_base_name, ".09.combine", insns);
3284 /* Register allocation pre-pass, to reduce number of moves
3285 necessary for two-address machines. */
3286 if (optimize > 0 && (flag_regmove || flag_expensive_optimizations))
3289 open_dump_file (".10.regmove", decl_printable_name (decl, 2));
3291 TIMEVAR (regmove_time, regmove_optimize (insns, max_reg_num (),
3296 close_dump_file (print_rtl_with_bb, insns);
3297 if (graph_dump_format != no_graph)
3298 print_rtl_graph_with_bb (dump_base_name, ".10.regmove", insns);
3305 /* Print function header into sched dump now
3306 because doing the sched analysis makes some of the dump. */
3308 if (optimize && n_basic_blocks)
3310 optimize_mode_switching (NULL_PTR);
3313 #ifdef INSN_SCHEDULING
3314 if (optimize > 0 && flag_schedule_insns)
3317 open_dump_file (".11.sched", decl_printable_name (decl, 2));
3319 /* Do control and data sched analysis,
3320 and write some of the results to dump file. */
3322 TIMEVAR (sched_time, schedule_insns (rtl_dump_file));
3324 /* Dump rtl after instruction scheduling. */
3328 close_dump_file (print_rtl_with_bb, insns);
3329 if (graph_dump_format != no_graph)
3330 print_rtl_graph_with_bb (dump_base_name, ".11.sched", insns);
3338 /* Determine if the current function is a leaf before running reload
3339 since this can impact optimizations done by the prologue and
3340 epilogue thus changing register elimination offsets. */
3341 current_function_is_leaf = leaf_function_p ();
3344 open_dump_file (".12.lreg", decl_printable_name (decl, 2));
3346 /* Allocate pseudo-regs that are used only within 1 basic block.
3348 RUN_JUMP_AFTER_RELOAD records whether or not we need to rerun the
3349 jump optimizer after register allocation and reloading are finished. */
3351 TIMEVAR (local_alloc_time,
3353 /* We recomputed reg usage as part of updating the rest
3354 of life info during sched. */
3355 if (! flag_schedule_insns)
3356 recompute_reg_usage (insns, ! optimize_size);
3357 regclass (insns, max_reg_num (), rtl_dump_file);
3358 rebuild_label_notes_after_reload = local_alloc ();
3361 /* Dump rtl code after allocating regs within basic blocks. */
3365 TIMEVAR (dump_time, dump_flow_info (rtl_dump_file));
3366 TIMEVAR (dump_time, dump_local_alloc (rtl_dump_file));
3368 close_dump_file (print_rtl_with_bb, insns);
3369 if (graph_dump_format != no_graph)
3370 print_rtl_graph_with_bb (dump_base_name, ".12.lreg", insns);
3376 if (global_reg_dump)
3377 open_dump_file (".13.greg", decl_printable_name (decl, 2));
3379 /* If optimizing, allocate remaining pseudo-regs. Do the reload
3380 pass fixing up any insns that are invalid. */
3382 TIMEVAR (global_alloc_time,
3385 failure = global_alloc (rtl_dump_file);
3388 build_insn_chain (insns);
3389 failure = reload (insns, 0, rtl_dump_file);
3394 goto exit_rest_of_compilation;
3399 /* Do a very simple CSE pass over just the hard registers. */
3401 reload_cse_regs (insns);
3403 /* If optimizing and we are performing instruction scheduling after
3404 reload, then go ahead and split insns now since we are about to
3405 recompute flow information anyway.
3407 reload_cse_regs may expose more splitting opportunities, expecially
3408 for double-word operations. */
3409 if (optimize > 0 && flag_schedule_insns_after_reload)
3410 split_all_insns (0);
3412 /* Register allocation and reloading may have turned an indirect jump into
3413 a direct jump. If so, we must rebuild the JUMP_LABEL fields of
3414 jumping instructions. */
3415 if (rebuild_label_notes_after_reload)
3416 TIMEVAR (jump_time, rebuild_jump_labels (insns));
3418 if (global_reg_dump)
3420 TIMEVAR (dump_time, dump_global_regs (rtl_dump_file));
3421 close_dump_file (print_rtl_with_bb, insns);
3422 if (graph_dump_format != no_graph)
3423 print_rtl_graph_with_bb (dump_base_name, ".13.greg", insns);
3426 /* Re-create the death notes which were deleted during reload. */
3428 open_dump_file (".14.flow2", decl_printable_name (decl, 2));
3430 TIMEVAR (flow2_time,
3432 find_basic_blocks (insns, max_reg_num (), rtl_dump_file);
3435 /* On some machines, the prologue and epilogue code, or parts thereof,
3436 can be represented as RTL. Doing so lets us schedule insns between
3437 it and the rest of the code and also allows delayed branch
3438 scheduling to operate in the epilogue. */
3439 thread_prologue_and_epilogue_insns (insns);
3446 cleanup_cfg (insns);
3447 life_analysis (insns, max_reg_num (), rtl_dump_file, 1);
3454 flow2_completed = 1;
3458 close_dump_file (print_rtl_with_bb, insns);
3459 if (graph_dump_format != no_graph)
3460 print_rtl_graph_with_bb (dump_base_name, ".14.flow2", insns);
3463 #ifdef HAVE_peephole2
3464 if (optimize > 0 && flag_peephole2)
3467 open_dump_file (".15.peephole2", decl_printable_name (decl, 2));
3469 TIMEVAR (peephole2_time, peephole2_optimize (rtl_dump_file));
3473 close_dump_file (print_rtl_with_bb, insns);
3474 if (graph_dump_format != no_graph)
3475 print_rtl_graph_with_bb (dump_base_name, ".15.peephole2", insns);
3480 #ifdef INSN_SCHEDULING
3481 if (optimize > 0 && flag_schedule_insns_after_reload)
3484 open_dump_file (".16.sched2", decl_printable_name (decl, 2));
3486 /* Do control and data sched analysis again,
3487 and write some more of the results to dump file. */
3489 TIMEVAR (sched2_time, schedule_insns (rtl_dump_file));
3491 /* Dump rtl after post-reorder instruction scheduling. */
3495 close_dump_file (print_rtl_with_bb, insns);
3496 if (graph_dump_format != no_graph)
3497 print_rtl_graph_with_bb (dump_base_name, ".16.sched2", insns);
3505 #ifdef LEAF_REGISTERS
3506 current_function_uses_only_leaf_regs
3507 = optimize > 0 && only_leaf_regs_used () && leaf_function_p ();
3510 if (optimize > 0 && flag_reorder_blocks)
3512 if (reorder_blocks_dump)
3513 open_dump_file (".bbro", decl_printable_name (decl, 2));
3515 TIMEVAR (reorder_blocks_time, reorder_basic_blocks ());
3517 if (reorder_blocks_dump)
3519 close_dump_file (print_rtl_with_bb, insns);
3520 if (graph_dump_format != no_graph)
3521 print_rtl_graph_with_bb (dump_base_name, ".bbro", insns);
3525 /* One more attempt to remove jumps to .+1 left by dead-store elimination.
3526 Also do cross-jumping this time and delete no-op move insns. */
3530 TIMEVAR (jump_time, jump_optimize (insns, JUMP_CROSS_JUMP,
3532 !JUMP_AFTER_REGSCAN));
3534 /* Dump rtl code after jump, if we are doing that. */
3538 dump_rtl (".17.jump2", decl, print_rtl_with_bb, insns);
3539 if (graph_dump_format != no_graph)
3540 print_rtl_graph_with_bb (dump_base_name, ".17.jump2", insns);
3544 /* If a machine dependent reorganization is needed, call it. */
3545 #ifdef MACHINE_DEPENDENT_REORG
3546 if (mach_dep_reorg_dump)
3547 open_dump_file (".18.mach", decl_printable_name (decl, 2));
3549 MACHINE_DEPENDENT_REORG (insns);
3551 if (mach_dep_reorg_dump)
3553 close_dump_file (print_rtl_with_bb, insns);
3554 if (graph_dump_format != no_graph)
3555 print_rtl_graph_with_bb (dump_base_name, ".18.mach", insns);
3562 /* If a scheduling pass for delayed branches is to be done,
3563 call the scheduling code. */
3566 if (optimize > 0 && flag_delayed_branch)
3569 open_dump_file (".19.dbr", decl_printable_name (decl, 2));
3574 dbr_schedule (insns, rtl_dump_file);
3579 close_dump_file (print_rtl_with_bb, insns);
3580 if (graph_dump_format != no_graph)
3581 print_rtl_graph_with_bb (dump_base_name, ".19.dbr", insns);
3589 /* Shorten branches.
3591 Note this must run before reg-stack because of death note (ab)use
3592 in the ia32 backend. */
3593 TIMEVAR (shorten_branch_time,
3595 shorten_branches (get_insns ());
3600 open_dump_file (".20.stack", decl_printable_name (decl, 2));
3602 TIMEVAR (stack_reg_time, reg_to_stack (insns, rtl_dump_file));
3606 close_dump_file (print_rtl_with_bb, insns);
3607 if (graph_dump_format != no_graph)
3608 print_rtl_graph_with_bb (dump_base_name, ".20.stack", insns);
3615 /* Now turn the rtl into assembler code. */
3617 TIMEVAR (final_time,
3622 /* Get the function's name, as described by its RTL.
3623 This may be different from the DECL_NAME name used
3624 in the source file. */
3626 x = DECL_RTL (decl);
3627 if (GET_CODE (x) != MEM)
3630 if (GET_CODE (x) != SYMBOL_REF)
3632 fnname = XSTR (x, 0);
3634 assemble_start_function (decl, fnname);
3635 final_start_function (insns, asm_out_file, optimize);
3636 final (insns, asm_out_file, optimize, 0);
3637 final_end_function (insns, asm_out_file, optimize);
3638 assemble_end_function (decl, fnname);
3640 fflush (asm_out_file);
3642 /* Release all memory allocated by flow. */
3643 free_basic_block_vars (0);
3645 /* Release all memory held by regsets now */
3646 regset_release_memory ();
3652 /* Write DBX symbols if requested */
3654 /* Note that for those inline functions where we don't initially
3655 know for certain that we will be generating an out-of-line copy,
3656 the first invocation of this routine (rest_of_compilation) will
3657 skip over this code by doing a `goto exit_rest_of_compilation;'.
3658 Later on, finish_compilation will call rest_of_compilation again
3659 for those inline functions that need to have out-of-line copies
3660 generated. During that call, we *will* be routed past here. */
3662 #ifdef DBX_DEBUGGING_INFO
3663 if (write_symbols == DBX_DEBUG)
3664 TIMEVAR (symout_time, dbxout_function (decl));
3667 #ifdef DWARF_DEBUGGING_INFO
3668 if (write_symbols == DWARF_DEBUG)
3669 TIMEVAR (symout_time, dwarfout_file_scope_decl (decl, 0));
3672 #ifdef DWARF2_DEBUGGING_INFO
3673 if (write_symbols == DWARF2_DEBUG)
3674 TIMEVAR (symout_time, dwarf2out_decl (decl));
3677 exit_rest_of_compilation:
3679 /* In case the function was not output,
3680 don't leave any temporary anonymous types
3681 queued up for sdb output. */
3682 #ifdef SDB_DEBUGGING_INFO
3683 if (write_symbols == SDB_DEBUG)
3684 sdbout_types (NULL_TREE);
3687 reload_completed = 0;
3688 flow2_completed = 0;
3691 TIMEVAR (final_time,
3693 /* Clear out the insn_length contents now that they are no
3695 init_insn_lengths ();
3697 /* Clear out the real_constant_chain before some of the rtx's
3698 it runs through become garbage. */
3699 clear_const_double_mem ();
3701 /* Cancel the effect of rtl_in_current_obstack. */
3702 resume_temporary_allocation ();
3704 /* Show no temporary slots allocated. */
3707 free_basic_block_vars (0);
3710 /* Make sure volatile mem refs aren't considered valid operands for
3711 arithmetic insns. We must call this here if this is a nested inline
3712 function, since the above code leaves us in the init_recog state
3713 (from final.c), and the function context push/pop code does not
3714 save/restore volatile_ok.
3716 ??? Maybe it isn't necessary for expand_start_function to call this
3717 anymore if we do it here? */
3719 init_recog_no_volatile ();
3721 /* We're done with this function. Free up memory if we can. */
3722 free_after_parsing (cfun);
3723 if (! DECL_DEFER_OUTPUT (decl))
3724 free_after_compilation (cfun);
3730 /* The parsing time is all the time spent in yyparse
3731 *except* what is spent in this function. */
3733 parse_time -= get_run_time () - start_time;
3744 printf ("Usage: %s input [switches]\n", progname);
3745 printf ("Switches:\n");
3747 printf (" -ffixed-<register> Mark <register> as being unavailable to the compiler\n");
3748 printf (" -fcall-used-<register> Mark <register> as being corrupted by function calls\n");
3749 printf (" -fcall-saved-<register> Mark <register> as being preserved across functions\n");
3750 printf (" -finline-limit=<number> Limits the size of inlined functions to <number>\n");
3752 for (i = NUM_ELEM (f_options); i--;)
3754 const char * description = f_options[i].description;
3756 if (description != NULL && * description != 0)
3757 printf (" -f%-21s %s\n",
3758 f_options[i].string, description);
3761 printf (" -O[number] Set optimisation level to [number]\n");
3762 printf (" -Os Optimise for space rather than speed\n");
3763 printf (" -pedantic Issue warnings needed by strict compliance to ANSI C\n");
3764 printf (" -pedantic-errors Like -pedantic except that errors are produced\n");
3765 printf (" -w Suppress warnings\n");
3766 printf (" -W Enable extra warnings\n");
3768 for (i = NUM_ELEM (W_options); i--;)
3770 const char * description = W_options[i].description;
3772 if (description != NULL && * description != 0)
3773 printf (" -W%-21s %s\n",
3774 W_options[i].string, description);
3777 printf (" -Wid-clash-<num> Warn if 2 identifiers have the same first <num> chars\n");
3778 printf (" -Wlarger-than-<number> Warn if an object is larger than <number> bytes\n");
3779 printf (" -p Enable function profiling\n");
3780 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER)
3781 printf (" -a Enable block profiling \n");
3783 #if defined (BLOCK_PROFILER) || defined (FUNCTION_BLOCK_PROFILER) || defined FUNCTION_BLOCK_PROFILER_EXIT
3784 printf (" -ax Enable jump profiling \n");
3786 printf (" -o <file> Place output into <file> \n");
3787 printf (" -G <number> Put global and static data smaller than <number>\n");
3788 printf (" bytes into a special section (on some targets)\n");
3790 for (i = NUM_ELEM (debug_args); i--;)
3792 if (debug_args[i].description != NULL)
3793 printf (" -g%-21s %s\n", debug_args[i].arg, debug_args[i].description);
3796 printf (" -aux-info <file> Emit declaration info into <file>.X\n");
3797 printf (" -quiet Do not display functions compiled or elapsed time\n");
3798 printf (" -version Display the compiler's version\n");
3799 printf (" -d[letters] Enable dumps from specific passes of the compiler\n");
3800 printf (" -dumpbase <file> Base name to be used for dumps from specific passes\n");
3801 #if defined INSN_SCHEDULING
3802 printf (" -sched-verbose=<number> Set the verbosity level of the scheduler\n");
3804 printf (" --help Display this information\n");
3809 /* Display descriptions of language specific options.
3810 If there is no description, note that there is an undocumented option.
3811 If the description is empty, do not display anything. (This allows
3812 options to be deliberately undocumented, for whatever reason).
3813 If the option string is missing, then this is a marker, indicating
3814 that the description string is in fact the name of a language, whose
3815 language specific options are to follow. */
3817 if (NUM_ELEM (documented_lang_options) > 1)
3819 printf ("\nLanguage specific options:\n");
3821 for (i = 0; i < NUM_ELEM (documented_lang_options); i++)
3823 const char * description = documented_lang_options[i].description;
3824 const char * option = documented_lang_options[i].option;
3826 if (description == NULL)
3831 printf (" %-23.23s [undocumented]\n", option);
3833 else if (* description == 0)
3835 else if (option == NULL)
3839 ("\nThere are undocumented %s specific options as well.\n",
3843 printf ("\n Options for %s:\n", description);
3848 printf (" %-23.23s %s\n", option, description);
3853 printf ("\nThere are undocumented %s specific options as well.\n", lang);
3855 if (NUM_ELEM (target_switches) > 1
3856 #ifdef TARGET_OPTIONS
3857 || NUM_ELEM (target_options) > 1
3865 printf ("\nTarget specific options:\n");
3867 for (i = NUM_ELEM (target_switches); i--;)
3869 const char * option = target_switches[i].name;
3870 const char * description = target_switches[i].description;
3872 if (option == NULL || * option == 0)
3874 else if (description == NULL)
3879 printf (" -m%-21.21s [undocumented]\n", option);
3881 else if (* description != 0)
3882 doc += printf (" -m%-21.21s %s\n", option, description);
3885 #ifdef TARGET_OPTIONS
3886 for (i = NUM_ELEM (target_options); i--;)
3888 const char * option = target_options[i].prefix;
3889 const char * description = target_options[i].description;
3891 if (option == NULL || * option == 0)
3893 else if (description == NULL)
3898 printf (" -m%-21.21s [undocumented]\n", option);
3900 else if (* description != 0)
3901 doc += printf (" -m%-21.21s %s\n", option, description);
3907 printf ("\nThere are undocumented target specific options as well.\n");
3909 printf (" They exist, but they are not documented.\n");
3914 /* Parse a -d... comand line switch. */
3917 decode_d_option (arg)
3924 branch_prob_dump = 1;
3929 reorder_blocks_dump = 1;
3932 global_reg_dump = 1;
3948 #ifdef MACHINE_DEPENDENT_REORG
3949 mach_dep_reorg_dump = 1;
3957 branch_prob_dump = 1;
3960 reorder_blocks_dump = 1;
3977 global_reg_dump = 1;
4002 #ifdef MACHINE_DEPENDENT_REORG
4004 mach_dep_reorg_dump = 1;
4008 flag_print_asm_name = 1;
4029 graph_dump_format = vcg;
4035 rtl_dump_and_exit = 1;
4043 case 'D': /* These are handled by the preprocessor. */
4047 warning ("unrecognised gcc debugging option: %c", arg[-1]);
4052 /* Parse a -f... comand line switch. ARG is the value after the -f.
4053 It is safe to access 'ARG - 2' to generate the full switch name.
4054 Return the number of strings consumed. */
4057 decode_f_option (arg)
4062 /* Search for the option in the table of binary f options. */
4063 for (j = sizeof (f_options) / sizeof (f_options[0]); j--;)
4065 if (!strcmp (arg, f_options[j].string))
4067 *f_options[j].variable = f_options[j].on_value;
4071 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4072 && ! strcmp (arg + 3, f_options[j].string))
4074 *f_options[j].variable = ! f_options[j].on_value;
4079 if (!strncmp (arg, "inline-limit-", 13)
4080 || !strncmp (arg, "inline-limit=", 13))
4082 read_integral_parameter (arg + 13, arg - 2, inline_max_insns);
4083 #ifdef INSN_SCHEDULING
4084 else if (!strncmp (arg, "sched-verbose=", 14))
4085 fix_sched_param ("verbose", (const char *)(arg + 14));
4087 else if (!strncmp (arg, "fixed-", 6))
4088 fix_register ((const char *)(arg + 6), 1, 1);
4089 else if (!strncmp (arg, "call-used-", 10))
4090 fix_register ((const char *)(arg + 10), 0, 1);
4091 else if (!strncmp (arg, "call-saved-", 11))
4092 fix_register ((const char *)(arg + 11), 0, 0);
4093 else if (!strncmp (arg, "align-loops=", 12))
4094 align_loops = read_integral_parameter (arg + 12, arg - 2, align_loops);
4095 else if (!strncmp (arg, "align-functions=", 16))
4097 read_integral_parameter (arg + 16, arg - 2, align_functions);
4098 else if (!strncmp (arg, "align-jumps=", 12))
4099 align_jumps = read_integral_parameter (arg + 12, arg - 2, align_jumps);
4100 else if (!strncmp (arg, "align-labels=", 13))
4101 align_labels = read_integral_parameter (arg + 13, arg - 2, align_labels);
4102 else if (!strncmp (arg, "stack-limit-register=", 21))
4104 int reg = decode_reg_name (arg + 21);
4106 error ("unrecognized register name `%s'", arg + 21);
4108 stack_limit_rtx = gen_rtx_REG (Pmode, reg);
4110 else if (!strncmp (arg, "stack-limit-symbol=", 19))
4114 nm = ggc_alloc_string (arg + 19, strlen (arg + 19));
4116 nm = xstrdup (arg + 19);
4117 stack_limit_rtx = gen_rtx_SYMBOL_REF (Pmode, nm);
4119 else if (!strcmp (arg, "no-stack-limit"))
4120 stack_limit_rtx = NULL_RTX;
4121 else if (!strcmp (arg, "preprocessed"))
4122 /* Recognise this switch but do nothing. This prevents warnings
4123 about an unrecognised switch if cpplib has not been linked in. */
4131 /* Parse a -W... comand line switch. ARG is the value after the -W.
4132 It is safe to access 'ARG - 2' to generate the full switch name.
4133 Return the number of strings consumed. */
4135 decode_W_option (arg)
4140 /* Search for the option in the table of binary W options. */
4142 for (j = sizeof (W_options) / sizeof (W_options[0]); j--;)
4144 if (!strcmp (arg, W_options[j].string))
4146 *W_options[j].variable = W_options[j].on_value;
4150 if (arg[0] == 'n' && arg[1] == 'o' && arg[2] == '-'
4151 && ! strcmp (arg + 3, W_options[j].string))
4153 *W_options[j].variable = ! W_options[j].on_value;
4158 if (!strncmp (arg, "id-clash-", 9))
4160 const int id_clash_val = read_integral_parameter (arg + 9, arg - 2, -1);
4162 if (id_clash_val != -1)
4164 id_clash_len = id_clash_val;
4168 else if (!strncmp (arg, "larger-than-", 12))
4170 const int larger_than_val =
4171 read_integral_parameter (arg + 12, arg - 2, -1);
4172 if (larger_than_val != -1)
4174 larger_than_size = larger_than_val;
4175 warn_larger_than = 1;
4184 /* Parse a -g... comand line switch. ARG is the value after the -g.
4185 It is safe to access 'ARG - 2' to generate the full switch name.
4186 Return the number of strings consumed. */
4189 decode_g_option (arg)
4193 /* A lot of code assumes write_symbols == NO_DEBUG if the
4194 debugging level is 0 (thus -gstabs1 -gstabs0 would lose track
4195 of what debugging type has been selected). This records the
4196 selected type. It is an error to specify more than one
4198 static enum debug_info_type selected_debug_type = NO_DEBUG;
4199 /* Non-zero if debugging format has been explicitly set.
4200 -g and -ggdb don't explicitly set the debugging format so
4201 -gdwarf -g3 is equivalent to -gdwarf3. */
4202 static int type_explicitly_set_p = 0;
4203 /* Indexed by enum debug_info_type. */
4204 static const char * debug_type_names[] =
4206 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff"
4209 /* The maximum admissible debug level value. */
4210 static const unsigned max_debug_level = 3;
4212 /* Look up ARG in the table. */
4213 for (da = debug_args; da->arg; da++)
4215 const int da_len = strlen (da->arg);
4217 if (da_len == 0 || ! strncmp (arg, da->arg, da_len))
4219 enum debug_info_type type = da->debug_type;
4220 const char * p = arg + da_len;
4222 if (*p && (*p < '0' || *p > '9'))
4225 /* A debug flag without a level defaults to level 2.
4226 Note we do not want to call read_integral_parameter
4227 for that case since it will call atoi which
4230 ??? We may want to generalize the interface to
4231 read_integral_parameter to better handle this case
4232 if this case shows up often. */
4234 level = read_integral_parameter (p, 0, max_debug_level + 1);
4238 if (da_len > 1 && *p && !strncmp (arg, "dwarf", da_len))
4240 error ("use -gdwarf -g%d for DWARF v1, level %d",
4243 error ("use -gdwarf-2 for DWARF v2");
4246 if (level > max_debug_level)
4249 ignoring option `%s' due to invalid debug level specification",
4251 level = debug_info_level;
4254 if (type == NO_DEBUG)
4256 type = PREFERRED_DEBUGGING_TYPE;
4258 if (da_len > 1 && strncmp (arg, "gdb", da_len) == 0)
4260 #if defined (DWARF2_DEBUGGING_INFO) && !defined (LINKER_DOES_NOT_WORK_WITH_DWARF2)
4261 type = DWARF2_DEBUG;
4263 #ifdef DBX_DEBUGGING_INFO
4270 if (type == NO_DEBUG)
4271 warning ("`%s': unknown or unsupported -g option", arg - 2);
4273 /* Does it conflict with an already selected type? */
4274 if (type_explicitly_set_p
4275 /* -g/-ggdb don't conflict with anything */
4276 && da->debug_type != NO_DEBUG
4277 && type != selected_debug_type)
4278 warning ("`%s' ignored, conflicts with `-g%s'",
4279 arg - 2, debug_type_names[(int) selected_debug_type]);
4282 /* If the format has already been set, -g/-ggdb
4283 only change the debug level. */
4284 if (type_explicitly_set_p && da->debug_type == NO_DEBUG)
4285 ; /* don't change debugging type */
4288 selected_debug_type = type;
4289 type_explicitly_set_p = da->debug_type != NO_DEBUG;
4292 write_symbols = (level == 0
4294 : selected_debug_type);
4295 use_gnu_debug_info_extensions = da->use_extensions_p;
4296 debug_info_level = (enum debug_info_level) level;
4304 warning ("`%s': unknown or unsupported -g option", arg - 2);
4309 /* Decode the first argument in the argv as a language-independent option.
4310 Return the number of strings consumed. 'strings_processed' is the
4311 number of strings that have already been decoded in a language
4312 specific fashion before this function was invoked. */
4315 independent_decode_option (argc, argv, strings_processed)
4318 unsigned strings_processed ATTRIBUTE_UNUSED;
4320 char * arg = argv[0];
4322 if (arg[0] != '-' || arg[1] == 0)
4334 if (!strcmp (arg, "-help"))
4349 /* Already been treated in main (). Do nothing. */
4353 set_target_switch (arg + 1);
4357 return decode_f_option (arg + 1);
4360 return decode_g_option (arg + 1);
4363 if (!strcmp (arg, "dumpbase"))
4368 dump_base_name = argv[1];
4372 decode_d_option (arg + 1);
4376 if (!strcmp (arg, "pedantic"))
4378 else if (!strcmp (arg, "pedantic-errors"))
4379 flag_pedantic_errors = pedantic = 1;
4380 else if (arg[1] == 0)
4387 if (!strcmp (arg, "quiet"))
4394 if (!strcmp (arg, "version"))
4402 inhibit_warnings = 1;
4411 /* We save the value of warn_uninitialized, since if they put
4412 -Wuninitialized on the command line, we need to generate a
4413 warning about not using it without also specifying -O. */
4414 if (warn_uninitialized != 1)
4415 warn_uninitialized = 2;
4418 return decode_W_option (arg + 1);
4424 #if !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4425 warning ("`-a' option (basic block profile) not supported");
4427 profile_block_flag = (profile_block_flag < 2) ? 1 : 3;
4430 else if (!strcmp (arg, "ax"))
4432 #if !defined (FUNCTION_BLOCK_PROFILER_EXIT) || !defined (BLOCK_PROFILER) || !defined (FUNCTION_BLOCK_PROFILER)
4433 warning ("`-ax' option (jump profiling) not supported");
4435 profile_block_flag = (!profile_block_flag
4436 || profile_block_flag == 2) ? 2 : 3;
4439 else if (!strncmp (arg, "aux-info", 8))
4441 flag_gen_aux_info = 1;
4447 aux_info_file_name = argv[1];
4451 aux_info_file_name = arg + 8;
4463 asm_file_name = argv[1];
4478 g_switch_val = read_integral_parameter (argv[1], 0, -1);
4483 g_switch_val = read_integral_parameter (arg + 1, 0, -1);
4487 if (g_switch_val == -1)
4491 g_switch_set = TRUE;
4492 g_switch_value = g_switch_val;
4502 /* Entry point of cc1/c++. Decode command args, then call compile_file.
4503 Exit code is 35 if can't open files, 34 if fatal error,
4504 33 if had nonfatal errors, else success. */
4506 extern int main PARAMS ((int, char **));
4516 /* save in case md file wants to emit args as a comment. */
4520 p = argv[0] + strlen (argv[0]);
4521 while (p != argv[0] && p[-1] != '/'
4522 #ifdef DIR_SEPARATOR
4523 && p[-1] != DIR_SEPARATOR
4529 #ifdef HAVE_LC_MESSAGES
4530 setlocale (LC_MESSAGES, "");
4532 (void) bindtextdomain (PACKAGE, localedir);
4533 (void) textdomain (PACKAGE);
4535 signal (SIGFPE, float_signal);
4538 signal (SIGPIPE, pipe_closed);
4541 decl_printable_name = decl_name;
4542 lang_expand_expr = (lang_expand_expr_t) do_abort;
4544 /* Initialize whether `char' is signed. */
4545 flag_signed_char = DEFAULT_SIGNED_CHAR;
4546 #ifdef DEFAULT_SHORT_ENUMS
4547 /* Initialize how much space enums occupy, by default. */
4548 flag_short_enums = DEFAULT_SHORT_ENUMS;
4551 /* Initialize the garbage-collector. */
4553 ggc_add_root (&input_file_stack, 1, sizeof input_file_stack,
4555 ggc_add_rtx_root (&stack_limit_rtx, 1);
4557 /* Perform language-specific options intialization. */
4558 lang_init_options ();
4560 /* Scan to see what optimization level has been specified. That will
4561 determine the default value of many flags. */
4562 for (i = 1; i < argc; i++)
4564 if (!strcmp (argv[i], "-O"))
4569 else if (argv[i][0] == '-' && argv[i][1] == 'O')
4571 /* Handle -Os, -O2, -O3, -O69, ... */
4572 char *p = &argv[i][2];
4574 if ((p[0] == 's') && (p[1] == 0))
4578 /* Optimizing for size forces optimize to be 2. */
4583 const int optimize_val = read_integral_parameter (p, p - 2, -1);
4584 if (optimize_val != -1)
4586 optimize = optimize_val;
4596 flag_thread_jumps = 1;
4598 flag_delayed_branch = 1;
4600 #ifdef CAN_DEBUG_WITHOUT_FP
4601 flag_omit_frame_pointer = 1;
4607 flag_cse_follow_jumps = 1;
4608 flag_cse_skip_blocks = 1;
4610 flag_expensive_optimizations = 1;
4611 flag_strength_reduce = 1;
4612 flag_rerun_cse_after_loop = 1;
4613 flag_rerun_loop_opt = 1;
4614 flag_caller_saves = 1;
4617 #ifdef INSN_SCHEDULING
4618 flag_schedule_insns = 1;
4619 flag_schedule_insns_after_reload = 1;
4622 flag_strict_aliasing = 1;
4623 flag_delete_null_pointer_checks = 1;
4628 flag_inline_functions = 1;
4631 if (optimize < 2 || optimize_size)
4636 align_functions = 1;
4639 /* Initialize target_flags before OPTIMIZATION_OPTIONS so the latter can
4642 set_target_switch ("");
4644 #ifdef OPTIMIZATION_OPTIONS
4645 /* Allow default optimizations to be specified on a per-machine basis. */
4646 OPTIMIZATION_OPTIONS (optimize, optimize_size);
4649 /* Initialize register usage now so switches may override. */
4652 /* Perform normal command line switch decoding. */
4653 for (i = 1; i < argc;)
4655 unsigned lang_processed;
4656 unsigned indep_processed;
4658 /* Give the language a chance to decode the option for itself. */
4659 lang_processed = lang_decode_option (argc - i, argv + i);
4661 /* Now see if the option also has a language independent meaning.
4662 Some options are both language specific and language independent,
4663 eg --help. It is possible that there might be options that should
4664 only be decoded in a language independent way if the were not
4665 decoded in a langauge specific way, which is why 'lang_processed'
4667 indep_processed = independent_decode_option (argc - i, argv + i,
4670 if (lang_processed || indep_processed)
4671 i += (lang_processed > indep_processed
4672 ? lang_processed : indep_processed);
4675 const char * option = NULL;
4676 const char * lang = NULL;
4679 /* It is possible that the command line switch is not valid for the
4680 current language, but it is valid for another language. In order
4681 to be compatible with previous versions of the compiler (which
4682 did not issue an error message in this case) we check for this
4683 possibilty here. If we do find a match, then if extra_warnings
4684 is set we generate a warning message, otherwise we will just
4685 ignore the option. */
4686 for (j = 0; j < NUM_ELEM (documented_lang_options); j++)
4688 option = documented_lang_options[j].option;
4691 lang = documented_lang_options[j].description;
4692 else if (! strncmp (argv[i], option, strlen (option)))
4696 if (j != NUM_ELEM (documented_lang_options))
4700 warning ("Ignoring command line option '%s'", argv[i]);
4703 (It is valid for %s but not the selected langauge)", lang);
4707 error ("Unrecognised option `%s'", argv[i]);
4713 /* Checker uses the frame pointer. */
4714 if (flag_check_memory_usage)
4715 flag_omit_frame_pointer = 0;
4719 /* Inlining does not work if not optimizing,
4720 so force it not to be done. */
4724 /* The c_decode_option and lang_decode_option functions set
4725 this to `2' if -Wall is used, so we can avoid giving out
4726 lots of errors for people who don't realize what -Wall does. */
4727 if (warn_uninitialized == 1)
4728 warning ("-Wuninitialized is not supported without -O");
4731 #ifdef OVERRIDE_OPTIONS
4732 /* Some machines may reject certain combinations of options. */
4736 if (exceptions_via_longjmp == 2)
4738 #ifdef DWARF2_UNWIND_INFO
4739 exceptions_via_longjmp = ! DWARF2_UNWIND_INFO;
4741 exceptions_via_longjmp = 1;
4745 /* Set up the align_*_log variables, defaulting them to 1 if they
4746 were still unset. */
4747 if (align_loops <= 0) align_loops = 1;
4748 align_loops_log = floor_log2 (align_loops*2-1);
4749 if (align_jumps <= 0) align_jumps = 1;
4750 align_jumps_log = floor_log2 (align_jumps*2-1);
4751 if (align_labels <= 0) align_labels = 1;
4752 align_labels_log = floor_log2 (align_labels*2-1);
4753 if (align_functions <= 0) align_functions = 1;
4754 align_functions_log = floor_log2 (align_functions*2-1);
4756 if (profile_block_flag == 3)
4758 warning ("`-ax' and `-a' are conflicting options. `-a' ignored.");
4759 profile_block_flag = 2;
4762 /* Unrolling all loops implies that standard loop unrolling must also
4764 if (flag_unroll_all_loops)
4765 flag_unroll_loops = 1;
4766 /* Loop unrolling requires that strength_reduction be on also. Silently
4767 turn on strength reduction here if it isn't already on. Also, the loop
4768 unrolling code assumes that cse will be run after loop, so that must
4769 be turned on also. */
4770 if (flag_unroll_loops)
4772 flag_strength_reduce = 1;
4773 flag_rerun_cse_after_loop = 1;
4776 /* Warn about options that are not supported on this machine. */
4777 #ifndef INSN_SCHEDULING
4778 if (flag_schedule_insns || flag_schedule_insns_after_reload)
4779 warning ("instruction scheduling not supported on this target machine");
4782 if (flag_delayed_branch)
4783 warning ("this target machine does not have delayed branches");
4786 user_label_prefix = USER_LABEL_PREFIX;
4787 if (flag_leading_underscore != -1)
4789 /* If the default prefix is more complicated than "" or "_",
4790 issue a warning and ignore this option. */
4791 if (user_label_prefix[0] == 0 ||
4792 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
4794 user_label_prefix = flag_leading_underscore ? "_" : "";
4797 warning ("-f%sleading-underscore not supported on this target machine",
4798 flag_leading_underscore ? "" : "no-");
4801 /* If we are in verbose mode, write out the version and maybe all the
4802 option flags in use. */
4805 print_version (stderr, "");
4807 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
4810 compile_file (filename);
4812 #if !defined(OS2) && !defined(VMS) && (!defined(_WIN32) || defined (__CYGWIN__)) && !defined(__INTERIX)
4815 char *lim = (char *) sbrk (0);
4817 fnotice (stderr, "Data size %ld.\n", (long) (lim - (char *) &environ));
4822 system ("ps -l 1>&2");
4825 #endif /* not USG */
4828 #endif /* ! OS2 && ! VMS && (! _WIN32 || CYGWIN) && ! __INTERIX */
4831 return (FATAL_EXIT_CODE);
4833 return (FATAL_EXIT_CODE);
4834 return (SUCCESS_EXIT_CODE);
4837 /* Decode -m switches. */
4838 /* Decode the switch -mNAME. */
4841 set_target_switch (name)
4845 int valid_target_option = 0;
4847 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4848 if (!strcmp (target_switches[j].name, name))
4850 if (target_switches[j].value < 0)
4851 target_flags &= ~-target_switches[j].value;
4853 target_flags |= target_switches[j].value;
4854 valid_target_option = 1;
4857 #ifdef TARGET_OPTIONS
4858 if (!valid_target_option)
4859 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4861 int len = strlen (target_options[j].prefix);
4862 if (!strncmp (target_options[j].prefix, name, len))
4864 *target_options[j].variable = name + len;
4865 valid_target_option = 1;
4870 if (!valid_target_option)
4871 error ("Invalid option `%s'", name);
4874 /* Print version information to FILE.
4875 Each line begins with INDENT (for the case where FILE is the
4876 assembler output file). */
4879 print_version (file, indent)
4884 #define __VERSION__ "[?]"
4888 "%s%s%s version %s (%s) compiled by GNU C version %s.\n"
4890 "%s%s%s version %s (%s) compiled by CC.\n"
4892 , indent, *indent != 0 ? " " : "",
4893 language_string, version_string, TARGET_NAME, __VERSION__);
4896 /* Print an option value and return the adjusted position in the line.
4897 ??? We don't handle error returns from fprintf (disk full); presumably
4898 other code will catch a disk full though. */
4901 print_single_switch (file, pos, max, indent, sep, term, type, name)
4904 const char *indent, *sep, *term, *type, *name;
4906 /* The ultrix fprintf returns 0 on success, so compute the result we want
4907 here since we need it for the following test. */
4908 int len = strlen (sep) + strlen (type) + strlen (name);
4913 fprintf (file, "%s", term);
4918 fprintf (file, "%s", indent);
4919 pos = strlen (indent);
4921 fprintf (file, "%s%s%s", sep, type, name);
4926 /* Print active target switches to FILE.
4927 POS is the current cursor position and MAX is the size of a "line".
4928 Each line begins with INDENT and ends with TERM.
4929 Each switch is separated from the next by SEP. */
4932 print_switch_values (file, pos, max, indent, sep, term)
4935 const char *indent, *sep, *term;
4940 /* Print the options as passed. */
4942 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
4943 _("options passed: "), "");
4945 for (p = &save_argv[1]; *p != NULL; p++)
4949 if (strcmp (*p, "-o") == 0)
4955 if (strcmp (*p, "-quiet") == 0)
4957 if (strcmp (*p, "-version") == 0)
4962 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
4965 fprintf (file, "%s", term);
4967 /* Print the -f and -m options that have been enabled.
4968 We don't handle language specific options but printing argv
4971 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
4972 _("options enabled: "), "");
4974 for (j = 0; j < sizeof f_options / sizeof f_options[0]; j++)
4975 if (*f_options[j].variable == f_options[j].on_value)
4976 pos = print_single_switch (file, pos, max, indent, sep, term,
4977 "-f", f_options[j].string);
4979 /* Print target specific options. */
4981 for (j = 0; j < sizeof target_switches / sizeof target_switches[0]; j++)
4982 if (target_switches[j].name[0] != '\0'
4983 && target_switches[j].value > 0
4984 && ((target_switches[j].value & target_flags)
4985 == target_switches[j].value))
4987 pos = print_single_switch (file, pos, max, indent, sep, term,
4988 "-m", target_switches[j].name);
4991 #ifdef TARGET_OPTIONS
4992 for (j = 0; j < sizeof target_options / sizeof target_options[0]; j++)
4993 if (*target_options[j].variable != NULL)
4996 sprintf (prefix, "-m%s", target_options[j].prefix);
4997 pos = print_single_switch (file, pos, max, indent, sep, term,
4998 prefix, *target_options[j].variable);
5002 fprintf (file, "%s", term);
5005 /* Record the beginning of a new source file, named FILENAME. */
5008 debug_start_source_file (filename)
5009 register char *filename ATTRIBUTE_UNUSED;
5011 #ifdef DBX_DEBUGGING_INFO
5012 if (write_symbols == DBX_DEBUG)
5013 dbxout_start_new_source_file (filename);
5015 #ifdef DWARF_DEBUGGING_INFO
5016 if (debug_info_level == DINFO_LEVEL_VERBOSE
5017 && write_symbols == DWARF_DEBUG)
5018 dwarfout_start_new_source_file (filename);
5019 #endif /* DWARF_DEBUGGING_INFO */
5020 #ifdef DWARF2_DEBUGGING_INFO
5021 if (debug_info_level == DINFO_LEVEL_VERBOSE
5022 && write_symbols == DWARF2_DEBUG)
5023 dwarf2out_start_source_file (filename);
5024 #endif /* DWARF2_DEBUGGING_INFO */
5025 #ifdef SDB_DEBUGGING_INFO
5026 if (write_symbols == SDB_DEBUG)
5027 sdbout_start_new_source_file (filename);
5031 /* Record the resumption of a source file. LINENO is the line number in
5032 the source file we are returning to. */
5035 debug_end_source_file (lineno)
5036 register unsigned lineno ATTRIBUTE_UNUSED;
5038 #ifdef DBX_DEBUGGING_INFO
5039 if (write_symbols == DBX_DEBUG)
5040 dbxout_resume_previous_source_file ();
5042 #ifdef DWARF_DEBUGGING_INFO
5043 if (debug_info_level == DINFO_LEVEL_VERBOSE
5044 && write_symbols == DWARF_DEBUG)
5045 dwarfout_resume_previous_source_file (lineno);
5046 #endif /* DWARF_DEBUGGING_INFO */
5047 #ifdef DWARF2_DEBUGGING_INFO
5048 if (debug_info_level == DINFO_LEVEL_VERBOSE
5049 && write_symbols == DWARF2_DEBUG)
5050 dwarf2out_end_source_file ();
5051 #endif /* DWARF2_DEBUGGING_INFO */
5052 #ifdef SDB_DEBUGGING_INFO
5053 if (write_symbols == SDB_DEBUG)
5054 sdbout_resume_previous_source_file ();
5058 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5059 the tail part of the directive line, i.e. the part which is past the
5060 initial whitespace, #, whitespace, directive-name, whitespace part. */
5063 debug_define (lineno, buffer)
5064 register unsigned lineno ATTRIBUTE_UNUSED;
5065 register char *buffer ATTRIBUTE_UNUSED;
5067 #ifdef DWARF_DEBUGGING_INFO
5068 if (debug_info_level == DINFO_LEVEL_VERBOSE
5069 && write_symbols == DWARF_DEBUG)
5070 dwarfout_define (lineno, buffer);
5071 #endif /* DWARF_DEBUGGING_INFO */
5072 #ifdef DWARF2_DEBUGGING_INFO
5073 if (debug_info_level == DINFO_LEVEL_VERBOSE
5074 && write_symbols == DWARF2_DEBUG)
5075 dwarf2out_define (lineno, buffer);
5076 #endif /* DWARF2_DEBUGGING_INFO */
5079 /* Called from check_newline in c-parse.y. The `buffer' parameter contains
5080 the tail part of the directive line, i.e. the part which is past the
5081 initial whitespace, #, whitespace, directive-name, whitespace part. */
5084 debug_undef (lineno, buffer)
5085 register unsigned lineno ATTRIBUTE_UNUSED;
5086 register char *buffer ATTRIBUTE_UNUSED;
5088 #ifdef DWARF_DEBUGGING_INFO
5089 if (debug_info_level == DINFO_LEVEL_VERBOSE
5090 && write_symbols == DWARF_DEBUG)
5091 dwarfout_undef (lineno, buffer);
5092 #endif /* DWARF_DEBUGGING_INFO */
5093 #ifdef DWARF2_DEBUGGING_INFO
5094 if (debug_info_level == DINFO_LEVEL_VERBOSE
5095 && write_symbols == DWARF2_DEBUG)
5096 dwarf2out_undef (lineno, buffer);
5097 #endif /* DWARF2_DEBUGGING_INFO */