1 /* Top level of GCC compilers (cc1, cc1plus, etc.)
2 Copyright (C) 1987, 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
3 1999, 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 2, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
22 /* This is the top level of cc1/c++.
23 It parses command args, opens files, invokes the various passes
24 in the proper order, and counts the time used by each.
25 Error messages and low-level interface to malloc also handled here. */
28 #undef FLOAT /* This is for hpux. They should change hpux. */
29 #undef FFS /* Some systems define this in param.h. */
31 #include "coretypes.h"
35 #ifdef HAVE_SYS_RESOURCE_H
36 # include <sys/resource.h>
39 #ifdef HAVE_SYS_TIMES_H
40 # include <sys/times.h>
49 #include "insn-attr.h"
50 #include "insn-config.h"
51 #include "insn-flags.h"
52 #include "hard-reg-set.h"
59 #include "basic-block.h"
66 #include "diagnostic.h"
69 #include "dwarf2asm.h"
70 #include "integrate.h"
74 #include "langhooks.h"
75 #include "cfglayout.h"
77 #include "hosthooks.h"
81 #include "value-prof.h"
82 #include "alloc-pool.h"
84 #if defined (DWARF2_UNWIND_INFO) || defined (DWARF2_DEBUGGING_INFO)
85 #include "dwarf2out.h"
88 #if defined(DBX_DEBUGGING_INFO) || defined(XCOFF_DEBUGGING_INFO)
92 #ifdef SDB_DEBUGGING_INFO
96 #ifdef XCOFF_DEBUGGING_INFO
97 #include "xcoffout.h" /* Needed for external data
98 declarations for e.g. AIX 4.x. */
101 static void general_init (const char *);
102 static void do_compile (void);
103 static void process_options (void);
104 static void backend_init (void);
105 static int lang_dependent_init (const char *);
106 static void init_asm_output (const char *);
107 static void finalize (void);
109 static void crash_signal (int) ATTRIBUTE_NORETURN;
110 static void setup_core_dumping (void);
111 static void compile_file (void);
113 static int print_single_switch (FILE *, int, int, const char *,
114 const char *, const char *,
115 const char *, const char *);
116 static void print_switch_values (FILE *, int, int, const char *,
117 const char *, const char *);
119 /* Nonzero to dump debug info whilst parsing (-dy option). */
120 static int set_yydebug;
122 /* True if we don't need a backend (e.g. preprocessing only). */
123 static bool no_backend;
125 /* Length of line when printing switch values. */
128 /* Name of program invoked, sans directories. */
130 const char *progname;
132 /* Copy of argument vector to toplev_main. */
133 static const char **save_argv;
135 /* Name of top-level original source file (what was input to cpp).
136 This comes from the #-command at the beginning of the actual input.
137 If there isn't any there, then this is the cc1 input file name. */
139 const char *main_input_filename;
141 /* Used to enable -fvar-tracking, -fweb and -frename-registers according
142 to optimize and default_debug_hooks in process_options (). */
143 #define AUTODETECT_FLAG_VAR_TRACKING 2
145 /* Current position in real source file. */
147 location_t input_location;
149 struct line_maps line_table;
151 /* Nonzero if it is unsafe to create any new pseudo registers. */
154 /* Stack of currently pending input files. */
156 struct file_stack *input_file_stack;
158 /* Incremented on each change to input_file_stack. */
159 int input_file_stack_tick;
161 /* Name to use as base of names for dump output files. */
163 const char *dump_base_name;
165 /* Name to use as a base for auxiliary output files. */
167 const char *aux_base_name;
169 /* Bit flags that specify the machine subtype we are compiling for.
170 Bits are tested using macros TARGET_... defined in the tm.h file
171 and set by `-m...' switches. Must be defined in rtlanal.c. */
173 extern int target_flags;
175 /* A mask of target_flags that includes bit X if X was set or cleared
176 on the command line. */
178 int target_flags_explicit;
180 /* Debug hooks - dependent upon command line options. */
182 const struct gcc_debug_hooks *debug_hooks;
184 /* Debug hooks - target default. */
186 static const struct gcc_debug_hooks *default_debug_hooks;
188 /* Other flags saying which kinds of debugging dump have been requested. */
190 int rtl_dump_and_exit;
191 int flag_print_asm_name;
192 enum graph_dump_types graph_dump_format;
194 /* Name for output file of assembly code, specified with -o. */
196 const char *asm_file_name;
198 /* Nonzero means do optimizations. -O.
199 Particular numeric values stand for particular amounts of optimization;
200 thus, -O2 stores 2 here. However, the optimizations beyond the basic
201 ones are not controlled directly by this variable. Instead, they are
202 controlled by individual `flag_...' variables that are defaulted
203 based on this variable. */
207 /* Nonzero means optimize for size. -Os.
208 The only valid values are zero and nonzero. When optimize_size is
209 nonzero, optimize defaults to 2, but certain individual code
210 bloating optimizations are disabled. */
212 int optimize_size = 0;
214 /* The FUNCTION_DECL for the function currently being compiled,
215 or 0 if between functions. */
216 tree current_function_decl;
218 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
220 tree current_function_func_begin_label;
222 /* Nonzero if doing dwarf2 duplicate elimination. */
224 int flag_eliminate_dwarf2_dups = 0;
226 /* Nonzero if doing unused type elimination. */
228 int flag_eliminate_unused_debug_types = 1;
230 /* Nonzero means emit debugging information only for symbols which are used. */
231 int flag_debug_only_used_symbols = 0;
233 /* Nonzero if generating code to do profiling. */
235 int profile_flag = 0;
237 /* Nonzero if generating code to profile program flow graph arcs. */
239 int profile_arc_flag = 0;
241 /* Nonzero if value histograms should be measured. */
243 int flag_profile_values = 0;
245 /* Nonzero if value histograms should be used to optimize code. */
246 int flag_value_profile_transformations = 0;
248 /* Nonzero if generating info for gcov to calculate line test coverage. */
250 int flag_test_coverage = 0;
252 /* Nonzero indicates that branch taken probabilities should be calculated. */
254 int flag_branch_probabilities = 0;
256 /* Nonzero if basic blocks should be reordered. */
258 int flag_reorder_blocks = 0;
260 /* Nonzero if blocks should be partitioned into hot and cold sections in
261 addition to being reordered. */
263 int flag_reorder_blocks_and_partition = 0;
265 /* Nonzero if functions should be reordered. */
267 int flag_reorder_functions = 0;
269 /* Nonzero if registers should be renamed. When
270 flag_rename_registers == AUTODETECT_FLAG_VAR_TRACKING it will be set
271 according to optimize and default_debug_hooks in process_options (). */
272 int flag_rename_registers = AUTODETECT_FLAG_VAR_TRACKING;
273 int flag_cprop_registers = 0;
275 /* Nonzero for -pedantic switch: warn about anything
276 that standard spec forbids. */
280 /* Temporarily suppress certain warnings.
281 This is set while reading code from a system header file. */
283 int in_system_header = 0;
285 /* Don't print functions as they are compiled. -quiet. */
289 /* Print times taken by the various passes. -ftime-report. */
293 /* Print memory still in use at end of compilation (which may have little
294 to do with peak memory consumption). -fmem-report. */
298 /* Nonzero means to collect statistics which might be expensive
299 and to print them when we are done. */
300 int flag_detailed_statistics = 0;
302 /* A random sequence of characters, unless overridden by user. */
303 const char *flag_random_seed;
305 /* A local time stamp derived from the time of compilation. It will be
306 zero if the system cannot provide a time. It will be -1u, if the
307 user has specified a particular random seed. */
312 /* Nonzero means `char' should be signed. */
314 int flag_signed_char;
316 /* Nonzero means give an enum type only as many bytes as it needs. */
318 int flag_short_enums;
320 /* Nonzero for -fcaller-saves: allocate values in regs that need to
321 be saved across function calls, if that produces overall better code.
322 Optional now, so people can test it. */
324 int flag_caller_saves = 0;
326 /* Nonzero if structures and unions should be returned in memory.
328 This should only be defined if compatibility with another compiler or
329 with an ABI is needed, because it results in slower code. */
331 #ifndef DEFAULT_PCC_STRUCT_RETURN
332 #define DEFAULT_PCC_STRUCT_RETURN 1
335 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
337 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
339 /* Nonzero for -fforce-mem: load memory value into a register
340 before arithmetic on it. This makes better cse but slower compilation. */
342 int flag_force_mem = 0;
344 /* Nonzero for -fforce-addr: load memory address into a register before
345 reference to memory. This makes better cse but slower compilation. */
347 int flag_force_addr = 0;
349 /* Nonzero for -fdefer-pop: don't pop args after each function call;
350 instead save them up to pop many calls' args with one insns. */
352 int flag_defer_pop = 0;
354 /* Nonzero for -ffloat-store: don't allocate floats and doubles
355 in extended-precision registers. */
357 int flag_float_store = 0;
359 /* Nonzero for -fcse-follow-jumps:
360 have cse follow jumps to do a more extensive job. */
362 int flag_cse_follow_jumps;
364 /* Nonzero for -fcse-skip-blocks:
365 have cse follow a branch around a block. */
366 int flag_cse_skip_blocks;
368 /* Nonzero for -fexpensive-optimizations:
369 perform miscellaneous relatively-expensive optimizations. */
370 int flag_expensive_optimizations;
372 /* Nonzero for -fthread-jumps:
373 have jump optimize output of loop. */
375 int flag_thread_jumps;
377 /* Nonzero enables strength-reduction in loop.c. */
379 int flag_strength_reduce = 0;
381 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
382 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
383 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
386 int flag_old_unroll_loops;
388 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
389 This is generally not a win. */
391 int flag_old_unroll_all_loops;
393 /* Enables unrolling of simple loops in loop-unroll.c. */
394 int flag_unroll_loops;
396 /* Enables unrolling of all loops in loop-unroll.c. */
397 int flag_unroll_all_loops;
399 /* Nonzero enables loop peeling. */
402 /* Nonzero enables loop unswitching. */
403 int flag_unswitch_loops;
405 /* Nonzero enables prefetch optimizations for arrays in loops. */
407 int flag_prefetch_loop_arrays;
409 /* Nonzero forces all invariant computations in loops to be moved
412 int flag_move_all_movables = 0;
414 /* Nonzero forces all general induction variables in loops to be
417 int flag_reduce_all_givs = 0;
419 /* Nonzero to perform full register move optimization passes. This is the
422 int flag_regmove = 0;
424 /* Nonzero means don't put addresses of constant functions in registers.
425 Used for compiling the Unix kernel, where strange substitutions are
426 done on the assembly output. */
428 int flag_no_function_cse = 0;
430 /* Nonzero for -fomit-frame-pointer:
431 don't make a frame pointer in simple functions that don't require one. */
433 int flag_omit_frame_pointer = 0;
435 /* Nonzero means place each function into its own section on those platforms
436 which support arbitrary section names and unlimited numbers of sections. */
438 int flag_function_sections = 0;
440 /* ... and similar for data. */
442 int flag_data_sections = 0;
444 /* Nonzero to inhibit use of define_optimization peephole opts. */
446 int flag_no_peephole = 0;
448 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
450 int flag_optimize_sibling_calls = 0;
452 /* Nonzero means the front end generally wants `errno' maintained by math
453 operations, like built-in SQRT. */
455 int flag_errno_math = 1;
457 /* Nonzero means that unsafe floating-point math optimizations are allowed
458 for the sake of speed. IEEE compliance is not guaranteed, and operations
459 are allowed to assume that their arguments and results are "normal"
460 (e.g., nonnegative for SQRT). */
462 int flag_unsafe_math_optimizations = 0;
464 /* Nonzero means that no NaNs or +-Infs are expected. */
466 int flag_finite_math_only = 0;
468 /* Zero means that floating-point math operations cannot generate a
469 (user-visible) trap. This is the case, for example, in nonstop
470 IEEE 754 arithmetic. Trapping conditions include division by zero,
471 overflow, underflow, invalid and inexact, but does not include
472 operations on signaling NaNs (see below). */
474 int flag_trapping_math = 1;
476 /* Nonzero means disable transformations that assume default floating
477 point rounding behavior. */
479 int flag_rounding_math = 0;
481 /* Nonzero means disable transformations observable by signaling NaNs.
482 This option implies that any operation on an IEEE signaling NaN can
483 generate a (user-visible) trap. */
485 int flag_signaling_nans = 0;
487 /* 0 means straightforward implementation of complex divide acceptable.
488 1 means wide ranges of inputs must work for complex divide.
489 2 means C99-like requirements for complex divide (not yet implemented). */
491 int flag_complex_divide_method = 0;
493 /* Nonzero means just do syntax checking; don't output anything. */
495 int flag_syntax_only = 0;
497 /* Nonzero means performs web construction pass. When flag_web ==
498 AUTODETECT_FLAG_VAR_TRACKING it will be set according to optimize
499 and default_debug_hooks in process_options (). */
501 int flag_web = AUTODETECT_FLAG_VAR_TRACKING;
503 /* Nonzero means perform loop optimizer. */
505 int flag_loop_optimize;
507 /* Nonzero means perform crossjumping. */
509 int flag_crossjumping;
511 /* Nonzero means perform if conversion. */
513 int flag_if_conversion;
515 /* Nonzero means perform if conversion after reload. */
517 int flag_if_conversion2;
519 /* Nonzero means to use global dataflow analysis to eliminate
520 useless null pointer tests. */
522 int flag_delete_null_pointer_checks;
524 /* Nonzero means perform global CSE. */
528 /* Nonzero means to do the enhanced load motion during gcse, which trys
529 to hoist loads by not killing them when a store to the same location
532 int flag_gcse_lm = 1;
534 /* Nonzero means to perform store motion after gcse, which will try to
535 move stores closer to the exit block. Its not very effective without
538 int flag_gcse_sm = 1;
540 /* Nonzero if we want to perform redundant load after store elimination
543 int flag_gcse_las = 1;
545 /* Nonzero means perform global cse after register allocation. */
546 int flag_gcse_after_reload = 0;
548 /* Perform target register optimization before prologue / epilogue
551 int flag_branch_target_load_optimize = 0;
553 /* Perform target register optimization after prologue / epilogue
554 threading and jump2. */
556 int flag_branch_target_load_optimize2 = 0;
558 /* For the bt-load pass, nonzero means don't re-use branch target registers
559 in any basic block. */
561 int flag_btr_bb_exclusive;
563 /* Nonzero means to rerun cse after loop optimization. This increases
564 compilation time about 20% and picks up a few more common expressions. */
566 int flag_rerun_cse_after_loop;
568 /* Nonzero means to run loop optimizations twice. */
570 int flag_rerun_loop_opt;
572 /* Nonzero for -finline-functions: ok to inline functions that look like
573 good inline candidates. */
575 int flag_inline_functions;
577 /* Nonzero for -fkeep-inline-functions: even if we make a function
578 go inline everywhere, keep its definition around for debugging
581 int flag_keep_inline_functions;
583 /* Nonzero means that functions will not be inlined. */
585 int flag_no_inline = 2;
587 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
588 not just because the tree inliner turned us off. */
590 int flag_really_no_inline = 2;
592 /* Nonzero means that we should emit static const variables
593 regardless of whether or not optimization is turned on. */
595 int flag_keep_static_consts = 1;
597 /* Nonzero means we should be saving declaration info into a .X file. */
599 int flag_gen_aux_info = 0;
601 /* Specified name of aux-info file. */
603 const char *aux_info_file_name;
605 /* Nonzero means make the text shared if supported. */
607 int flag_shared_data;
609 /* Nonzero means schedule into delayed branch slots if supported. */
611 int flag_delayed_branch;
613 /* Nonzero if we are compiling pure (sharable) code.
614 Value is 1 if we are doing "small" pic; value is 2 if we're doing
619 /* Nonzero if we are compiling position independent code for executable.
620 The value is 1 if we are doing "small" pic; value is 2 if we're doing
625 /* Nonzero if we are compiling code for a shared library, zero for
630 /* Set to the default thread-local storage (tls) model to use. */
632 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
634 /* Nonzero means generate extra code for exception handling and enable
635 exception handling. */
639 /* Nonzero means generate frame unwind info table when supported. */
641 int flag_unwind_tables = 0;
643 /* Nonzero means generate frame unwind info table exact at each insn
646 int flag_asynchronous_unwind_tables = 0;
648 /* Nonzero means don't place uninitialized global data in common storage
653 /* Nonzero means change certain warnings into errors.
654 Usually these are warnings about failure to conform to some standard. */
656 int flag_pedantic_errors = 0;
658 /* flag_schedule_insns means schedule insns within basic blocks (before
660 flag_schedule_insns_after_reload means schedule insns after
663 int flag_schedule_insns = 0;
664 int flag_schedule_insns_after_reload = 0;
666 /* When flag_schedule_insns_after_reload is set, use EBB scheduler. */
667 int flag_sched2_use_superblocks = 0;
669 /* When flag_schedule_insns_after_reload is set, construct traces and EBB
671 int flag_sched2_use_traces = 0;
673 /* The following flags have effect only for scheduling before register
676 flag_schedule_interblock means schedule insns across basic blocks.
677 flag_schedule_speculative means allow speculative motion of non-load insns.
678 flag_schedule_speculative_load means allow speculative motion of some
680 flag_schedule_speculative_load_dangerous allows speculative motion of more
683 int flag_schedule_interblock = 1;
684 int flag_schedule_speculative = 1;
685 int flag_schedule_speculative_load = 0;
686 int flag_schedule_speculative_load_dangerous = 0;
688 /* The following flags have an effect during scheduling after register
691 flag_sched_stalled_insns means that insns can be moved prematurely from the queue
692 of stalled insns into the ready list.
694 flag_sched_stalled_insns_dep controls how many insn groups will be examined
695 for a dependency on a stalled insn that is candidate for premature removal
696 from the queue of stalled insns into the ready list (has an effect only if
697 the flag 'sched_stalled_insns' is set). */
699 int flag_sched_stalled_insns = 0;
700 int flag_sched_stalled_insns_dep = 1;
702 int flag_single_precision_constant;
704 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
705 by a cheaper branch on a count register. */
706 int flag_branch_on_count_reg = 1;
708 /* -finhibit-size-directive inhibits output of .size for ELF.
709 This is used only for compiling crtstuff.c,
710 and it may be extended to other effects
711 needed for crtstuff.c on other systems. */
712 int flag_inhibit_size_directive = 0;
714 /* -fverbose-asm causes extra commentary information to be produced in
715 the generated assembly code (to make it more readable). This option
716 is generally only of use to those who actually need to read the
717 generated assembly code (perhaps while debugging the compiler itself).
718 -fno-verbose-asm, the default, causes the extra information
719 to be omitted and is useful when comparing two assembler files. */
721 int flag_verbose_asm = 0;
723 /* -dA causes debug commentary information to be produced in
724 the generated assembly code (to make it more readable). This option
725 is generally only of use to those who actually need to read the
726 generated assembly code (perhaps while debugging the compiler itself).
727 Currently, this switch is only used by dwarfout.c; however, it is intended
728 to be a catchall for printing debug information in the assembler file. */
730 int flag_debug_asm = 0;
732 /* -dP causes the rtl to be emitted as a comment in assembly. */
734 int flag_dump_rtl_in_asm = 0;
736 /* Nonzero means put zero initialized data in the bss section. */
737 int flag_zero_initialized_in_bss = 1;
739 /* Tag all structures with __attribute__(packed). */
740 int flag_pack_struct = 0;
742 /* Emit code to check for stack overflow; also may cause large objects
743 to be allocated dynamically. */
744 int flag_stack_check;
746 /* When non-NULL, indicates that whenever space is allocated on the
747 stack, the resulting stack pointer must not pass this
748 address---that is, for stacks that grow downward, the stack pointer
749 must always be greater than or equal to this address; for stacks
750 that grow upward, the stack pointer must be less than this address.
751 At present, the rtx may be either a REG or a SYMBOL_REF, although
752 the support provided depends on the backend. */
755 /* 0 if pointer arguments may alias each other. True in C.
756 1 if pointer arguments may not alias each other but may alias
758 2 if pointer arguments may not alias each other and may not
759 alias global variables. True in Fortran.
760 This defaults to 0 for C. */
761 int flag_argument_noalias = 0;
763 /* Nonzero if we should do (language-dependent) alias analysis.
764 Typically, this analysis will assume that expressions of certain
765 types do not alias expressions of certain other types. Only used
766 if alias analysis (in general) is enabled. */
767 int flag_strict_aliasing = 0;
769 /* Instrument functions with calls at entry and exit, for profiling. */
770 int flag_instrument_function_entry_exit = 0;
772 /* Nonzero means ignore `#ident' directives. 0 means handle them.
773 On SVR4 targets, it also controls whether or not to emit a
774 string identifying the compiler. */
776 int flag_no_ident = 0;
778 /* This will perform a peephole pass before sched2. */
779 int flag_peephole2 = 0;
781 /* This will try to guess branch probabilities. */
782 int flag_guess_branch_prob = 0;
784 /* -fcheck-bounds causes gcc to generate array bounds checks.
785 For C, C++, ObjC: defaults to off.
786 For Java: defaults to on.
787 For Fortran: defaults to off. */
788 int flag_bounds_check = 0;
790 /* This will attempt to merge constant section constants, if 1 only
791 string constants and constants from constant pool, if 2 also constant
793 int flag_merge_constants = 1;
795 /* If one, renumber instruction UIDs to reduce the number of
796 unused UIDs if there are a lot of instructions. If greater than
797 one, unconditionally renumber instruction UIDs. */
798 int flag_renumber_insns = 1;
800 /* If nonzero, use the graph coloring register allocator. */
801 int flag_new_regalloc = 0;
803 /* Nonzero if we perform superblock formation. */
807 /* Nonzero if we perform whole unit at a time compilation. */
809 int flag_unit_at_a_time = 0;
811 /* Nonzero if we should track variables. When
812 flag_var_tracking == AUTODETECT_FLAG_VAR_TRACKING it will be set according
813 to optimize, debug_info_level and debug_hooks in process_options (). */
814 int flag_var_tracking = AUTODETECT_FLAG_VAR_TRACKING;
816 /* Values of the -falign-* flags: how much to align labels in code.
817 0 means `use default', 1 means `don't align'.
818 For each variable, there is an _log variant which is the power
819 of two not less than the variable, for .align output. */
823 int align_loops_max_skip;
826 int align_jumps_max_skip;
828 int align_labels_log;
829 int align_labels_max_skip;
831 int align_functions_log;
833 /* Like align_functions_log above, but used by front-ends to force the
834 minimum function alignment. Zero means no alignment is forced. */
835 int force_align_functions_log;
839 const char *const string;
843 lang_independent_options;
845 /* Nonzero if signed arithmetic overflow should trap. */
848 /* Nonzero if signed arithmetic overflow should wrap around. */
851 /* Nonzero if subexpressions must be evaluated from left-to-right. */
852 int flag_evaluation_order = 0;
854 /* Add or remove a leading underscore from user symbols. */
855 int flag_leading_underscore = -1;
857 /* The version of the C++ ABI in use. The following values are
860 0: The version of the ABI believed most conformant with the
861 C++ ABI specification. This ABI may change as bugs are
862 discovered and fixed. Therefore, 0 will not necessarily
863 indicate the same ABI in different versions of G++.
865 1: The version of the ABI first used in G++ 3.2.
867 2: The version of the ABI first used in G++ 3.4.
869 Additional positive integers will be assigned as new versions of
870 the ABI become the default version of the ABI. */
872 int flag_abi_version = 2;
874 /* The user symbol prefix after having resolved same. */
875 const char *user_label_prefix;
877 static const param_info lang_independent_params[] = {
878 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \
879 { OPTION, DEFAULT, HELP },
880 #include "params.def"
885 /* Table of language-independent -f options.
886 STRING is the option name. VARIABLE is the address of the variable.
887 ON_VALUE is the value to store in VARIABLE
888 if `-fSTRING' is seen as an option.
889 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
891 static const lang_independent_options f_options[] =
893 {"eliminate-dwarf2-dups", &flag_eliminate_dwarf2_dups, 1 },
894 {"eliminate-unused-debug-symbols", &flag_debug_only_used_symbols, 1 },
895 {"eliminate-unused-debug-types", &flag_eliminate_unused_debug_types, 1 },
896 {"float-store", &flag_float_store, 1 },
897 {"defer-pop", &flag_defer_pop, 1 },
898 {"omit-frame-pointer", &flag_omit_frame_pointer, 1 },
899 {"optimize-sibling-calls", &flag_optimize_sibling_calls, 1 },
900 {"tracer", &flag_tracer, 1 },
901 {"unit-at-a-time", &flag_unit_at_a_time, 1 },
902 {"cse-follow-jumps", &flag_cse_follow_jumps, 1 },
903 {"cse-skip-blocks", &flag_cse_skip_blocks, 1 },
904 {"expensive-optimizations", &flag_expensive_optimizations, 1 },
905 {"thread-jumps", &flag_thread_jumps, 1 },
906 {"strength-reduce", &flag_strength_reduce, 1 },
907 {"unroll-loops", &flag_unroll_loops, 1 },
908 {"unroll-all-loops", &flag_unroll_all_loops, 1 },
909 {"old-unroll-loops", &flag_old_unroll_loops, 1 },
910 {"old-unroll-all-loops", &flag_old_unroll_all_loops, 1 },
911 {"peel-loops", &flag_peel_loops, 1 },
912 {"unswitch-loops", &flag_unswitch_loops, 1 },
913 {"prefetch-loop-arrays", &flag_prefetch_loop_arrays, 1 },
914 {"move-all-movables", &flag_move_all_movables, 1 },
915 {"reduce-all-givs", &flag_reduce_all_givs, 1 },
916 {"peephole", &flag_no_peephole, 0 },
917 {"force-mem", &flag_force_mem, 1 },
918 {"force-addr", &flag_force_addr, 1 },
919 {"function-cse", &flag_no_function_cse, 0 },
920 {"inline-functions", &flag_inline_functions, 1 },
921 {"keep-inline-functions", &flag_keep_inline_functions, 1 },
922 {"inline", &flag_no_inline, 0 },
923 {"keep-static-consts", &flag_keep_static_consts, 1 },
924 {"syntax-only", &flag_syntax_only, 1 },
925 {"shared-data", &flag_shared_data, 1 },
926 {"caller-saves", &flag_caller_saves, 1 },
927 {"pcc-struct-return", &flag_pcc_struct_return, 1 },
928 {"reg-struct-return", &flag_pcc_struct_return, 0 },
929 {"delayed-branch", &flag_delayed_branch, 1 },
930 {"web", &flag_web, 1},
931 {"gcse", &flag_gcse, 1 },
932 {"gcse-lm", &flag_gcse_lm, 1 },
933 {"gcse-sm", &flag_gcse_sm, 1 },
934 {"gcse-las", &flag_gcse_las, 1 },
935 {"gcse-after-reload", &flag_gcse_after_reload, 1},
936 {"branch-target-load-optimize", &flag_branch_target_load_optimize, 1 },
937 {"branch-target-load-optimize2", &flag_branch_target_load_optimize2, 1 },
938 {"btr-bb-exclusive", &flag_btr_bb_exclusive, 1 },
939 {"loop-optimize", &flag_loop_optimize, 1 },
940 {"crossjumping", &flag_crossjumping, 1 },
941 {"if-conversion", &flag_if_conversion, 1 },
942 {"if-conversion2", &flag_if_conversion2, 1 },
943 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1 },
944 {"rerun-loop-opt", &flag_rerun_loop_opt, 1 },
945 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1 },
946 {"schedule-insns", &flag_schedule_insns, 1 },
947 {"schedule-insns2", &flag_schedule_insns_after_reload, 1 },
948 {"sched-interblock",&flag_schedule_interblock, 1 },
949 {"sched-spec",&flag_schedule_speculative, 1 },
950 {"sched-spec-load",&flag_schedule_speculative_load, 1 },
951 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1 },
952 {"sched-stalled-insns", &flag_sched_stalled_insns, 0 },
953 {"sched-stalled-insns-dep", &flag_sched_stalled_insns_dep, 1 },
954 {"sched2-use-superblocks", &flag_sched2_use_superblocks, 1 },
955 {"sched2-use-traces", &flag_sched2_use_traces, 1 },
956 {"branch-count-reg",&flag_branch_on_count_reg, 1 },
957 {"pic", &flag_pic, 1 },
958 {"PIC", &flag_pic, 2 },
959 {"pie", &flag_pie, 1 },
960 {"PIE", &flag_pie, 2 },
961 {"exceptions", &flag_exceptions, 1 },
962 {"unwind-tables", &flag_unwind_tables, 1 },
963 {"asynchronous-unwind-tables", &flag_asynchronous_unwind_tables, 1 },
964 {"non-call-exceptions", &flag_non_call_exceptions, 1 },
965 {"profile-arcs", &profile_arc_flag, 1 },
966 {"profile-values", &flag_profile_values, 1 },
967 {"vpt", &flag_value_profile_transformations, 1 },
968 {"test-coverage", &flag_test_coverage, 1 },
969 {"branch-probabilities", &flag_branch_probabilities, 1 },
970 {"profile", &profile_flag, 1 },
971 {"reorder-blocks", &flag_reorder_blocks, 1 },
972 {"reorder-blocks-and-partition", &flag_reorder_blocks_and_partition, 1},
973 {"reorder-functions", &flag_reorder_functions, 1 },
974 {"rename-registers", &flag_rename_registers, 1 },
975 {"cprop-registers", &flag_cprop_registers, 1 },
976 {"common", &flag_no_common, 0 },
977 {"inhibit-size-directive", &flag_inhibit_size_directive, 1 },
978 {"function-sections", &flag_function_sections, 1 },
979 {"data-sections", &flag_data_sections, 1 },
980 {"verbose-asm", &flag_verbose_asm, 1 },
981 {"regmove", &flag_regmove, 1 },
982 {"optimize-register-move", &flag_regmove, 1 },
983 {"pack-struct", &flag_pack_struct, 1 },
984 {"stack-check", &flag_stack_check, 1 },
985 {"argument-alias", &flag_argument_noalias, 0 },
986 {"argument-noalias", &flag_argument_noalias, 1 },
987 {"argument-noalias-global", &flag_argument_noalias, 2 },
988 {"strict-aliasing", &flag_strict_aliasing, 1 },
989 {"align-loops", &align_loops, 0 },
990 {"align-jumps", &align_jumps, 0 },
991 {"align-labels", &align_labels, 0 },
992 {"align-functions", &align_functions, 0 },
993 {"merge-constants", &flag_merge_constants, 1 },
994 {"merge-all-constants", &flag_merge_constants, 2 },
995 {"dump-unnumbered", &flag_dump_unnumbered, 1 },
996 {"instrument-functions", &flag_instrument_function_entry_exit, 1 },
997 {"zero-initialized-in-bss", &flag_zero_initialized_in_bss, 1 },
998 {"leading-underscore", &flag_leading_underscore, 1 },
999 {"ident", &flag_no_ident, 0 },
1000 { "peephole2", &flag_peephole2, 1 },
1001 {"finite-math-only", &flag_finite_math_only, 1 },
1002 { "guess-branch-probability", &flag_guess_branch_prob, 1 },
1003 {"math-errno", &flag_errno_math, 1 },
1004 {"trapping-math", &flag_trapping_math, 1 },
1005 {"rounding-math", &flag_rounding_math, 1 },
1006 {"unsafe-math-optimizations", &flag_unsafe_math_optimizations, 1 },
1007 {"signaling-nans", &flag_signaling_nans, 1 },
1008 {"bounds-check", &flag_bounds_check, 1 },
1009 {"single-precision-constant", &flag_single_precision_constant, 1 },
1010 {"time-report", &time_report, 1 },
1011 {"mem-report", &mem_report, 1 },
1012 { "trapv", &flag_trapv, 1 },
1013 { "wrapv", &flag_wrapv, 1 },
1014 { "new-ra", &flag_new_regalloc, 1 },
1015 { "var-tracking", &flag_var_tracking, 1}
1018 /* Here is a table, controlled by the tm.h file, listing each -m switch
1019 and which bits in `target_switches' it should set or clear.
1020 If VALUE is positive, it is bits to set.
1021 If VALUE is negative, -VALUE is bits to clear.
1022 (The sign bit is not used so there is no confusion.) */
1026 const char *const name;
1028 const char *const description;
1030 target_switches[] = TARGET_SWITCHES;
1032 /* This table is similar, but allows the switch to have a value. */
1034 #ifdef TARGET_OPTIONS
1037 const char *const prefix;
1038 const char **const variable;
1039 const char *const description;
1040 const char *const value;
1042 target_options[] = TARGET_OPTIONS;
1045 /* Nonzero means warn about function definitions that default the return type
1046 or that use a null return and have a return-type other than void. */
1048 int warn_return_type;
1050 /* Output files for assembler code (real compiler output)
1051 and debugging dumps. */
1054 FILE *aux_info_file;
1055 FILE *dump_file = NULL;
1056 FILE *cgraph_dump_file = NULL;
1058 /* The current working directory of a translation. It's generally the
1059 directory from which compilation was initiated, but a preprocessed
1060 file may specify the original directory in which it was
1063 static const char *src_pwd;
1065 /* Initialize src_pwd with the given string, and return true. If it
1066 was already initialized, return false. As a special case, it may
1067 be called with a NULL argument to test whether src_pwd has NOT been
1071 set_src_pwd (const char *pwd)
1075 if (strcmp (src_pwd, pwd) == 0)
1081 src_pwd = xstrdup (pwd);
1085 /* Return the directory from which the translation unit was initiated,
1086 in case set_src_pwd() was not called before to assign it a
1093 src_pwd = getpwd ();
1098 /* Called when the start of a function definition is parsed,
1099 this function prints on stderr the name of the function. */
1101 announce_function (tree decl)
1105 if (rtl_dump_and_exit)
1106 verbatim ("%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
1108 verbatim (" %s", lang_hooks.decl_printable_name (decl, 2));
1110 pp_needs_newline (global_dc->printer) = true;
1111 diagnostic_set_last_function (global_dc);
1115 /* Set up a default flag_random_seed and local_tick, unless the user
1116 already specified one. */
1121 if (!flag_random_seed)
1123 unsigned HOST_WIDE_INT value;
1124 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
1126 /* Get some more or less random data. */
1127 #ifdef HAVE_GETTIMEOFDAY
1131 gettimeofday (&tv, NULL);
1132 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
1136 time_t now = time (NULL);
1138 if (now != (time_t)-1)
1139 local_tick = (unsigned) now;
1142 value = local_tick ^ getpid ();
1144 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
1145 flag_random_seed = random_seed;
1147 else if (!local_tick)
1152 /* Decode the string P as an integral parameter.
1153 If the string is indeed an integer return its numeric value else
1154 issue an Invalid Option error for the option PNAME and return DEFVAL.
1155 If PNAME is zero just return DEFVAL, do not call error. */
1158 read_integral_parameter (const char *p, const char *pname, const int defval)
1160 const char *endp = p;
1164 if (ISDIGIT (*endp))
1173 error ("invalid option argument `%s'", pname);
1180 /* Return the logarithm of X, base 2, considering X unsigned,
1181 if X is a power of 2. Otherwise, returns -1.
1183 This should be used via the `exact_log2' macro. */
1186 exact_log2_wide (unsigned HOST_WIDE_INT x)
1189 /* Test for 0 or a power of 2. */
1190 if (x == 0 || x != (x & -x))
1192 while ((x >>= 1) != 0)
1197 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1198 If X is 0, return -1.
1200 This should be used via the floor_log2 macro. */
1203 floor_log2_wide (unsigned HOST_WIDE_INT x)
1212 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1213 into ICE messages, which is much more user friendly. In case the
1214 error printer crashes, reset the signal to prevent infinite recursion. */
1217 crash_signal (int signo)
1219 signal (signo, SIG_DFL);
1220 internal_error ("%s", strsignal (signo));
1223 /* Arrange to dump core on error. (The regular error message is still
1224 printed first, except in the case of abort().) */
1227 setup_core_dumping (void)
1230 signal (SIGABRT, SIG_DFL);
1232 #if defined(HAVE_SETRLIMIT)
1235 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
1236 fatal_error ("getting core file size maximum limit: %m");
1237 rlim.rlim_cur = rlim.rlim_max;
1238 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
1239 fatal_error ("setting core file size limit to maximum: %m");
1242 diagnostic_abort_on_error (global_dc);
1246 /* Strip off a legitimate source ending from the input string NAME of
1247 length LEN. Rather than having to know the names used by all of
1248 our front ends, we strip off an ending of a period followed by
1249 up to five characters. (Java uses ".class".) */
1252 strip_off_ending (char *name, int len)
1255 for (i = 2; i < 6 && len > i; i++)
1257 if (name[len - i] == '.')
1259 name[len - i] = '\0';
1265 /* Output a quoted string. */
1268 output_quoted_string (FILE *asm_file, const char *string)
1270 #ifdef OUTPUT_QUOTED_STRING
1271 OUTPUT_QUOTED_STRING (asm_file, string);
1275 putc ('\"', asm_file);
1276 while ((c = *string++) != 0)
1280 if (c == '\"' || c == '\\')
1281 putc ('\\', asm_file);
1285 fprintf (asm_file, "\\%03o", (unsigned char) c);
1287 putc ('\"', asm_file);
1291 /* Output a file name in the form wanted by System V. */
1294 output_file_directive (FILE *asm_file, const char *input_name)
1299 if (input_name == NULL)
1300 input_name = "<stdin>";
1302 len = strlen (input_name);
1303 na = input_name + len;
1305 /* NA gets INPUT_NAME sans directory names. */
1306 while (na > input_name)
1308 if (IS_DIR_SEPARATOR (na[-1]))
1313 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1314 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1316 fprintf (asm_file, "\t.file\t");
1317 output_quoted_string (asm_file, na);
1318 fputc ('\n', asm_file);
1322 /* Do any final processing required for the declarations in VEC, of
1323 which there are LEN. We write out inline functions and variables
1324 that have been deferred until this point, but which are required.
1325 Returns nonzero if anything was put out. */
1328 wrapup_global_declarations (tree *vec, int len)
1333 int output_something = 0;
1335 for (i = 0; i < len; i++)
1339 /* We're not deferring this any longer. Assignment is
1340 conditional to avoid needlessly dirtying PCH pages. */
1341 if (DECL_DEFER_OUTPUT (decl) != 0)
1342 DECL_DEFER_OUTPUT (decl) = 0;
1344 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
1345 lang_hooks.finish_incomplete_decl (decl);
1348 /* Now emit any global variables or functions that we have been
1349 putting off. We need to loop in case one of the things emitted
1350 here references another one which comes earlier in the list. */
1354 for (i = 0; i < len; i++)
1358 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1361 /* Don't write out static consts, unless we still need them.
1363 We also keep static consts if not optimizing (for debugging),
1364 unless the user specified -fno-keep-static-consts.
1365 ??? They might be better written into the debug information.
1366 This is possible when using DWARF.
1368 A language processor that wants static constants to be always
1369 written out (even if it is not used) is responsible for
1370 calling rest_of_decl_compilation itself. E.g. the C front-end
1371 calls rest_of_decl_compilation from finish_decl.
1372 One motivation for this is that is conventional in some
1373 environments to write things like:
1374 static const char rcsid[] = "... version string ...";
1375 intending to force the string to be in the executable.
1377 A language processor that would prefer to have unneeded
1378 static constants "optimized away" would just defer writing
1379 them out until here. E.g. C++ does this, because static
1380 constants are often defined in header files.
1382 ??? A tempting alternative (for both C and C++) would be
1383 to force a constant to be written if and only if it is
1384 defined in a main file, as opposed to an include file. */
1386 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
1390 if (flag_unit_at_a_time
1391 && cgraph_varpool_node (decl)->finalized)
1393 else if ((flag_unit_at_a_time && !cgraph_global_info_ready)
1394 && (TREE_USED (decl)
1395 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
1397 else if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1399 else if (DECL_COMDAT (decl))
1401 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
1402 && (optimize || !flag_keep_static_consts
1403 || DECL_ARTIFICIAL (decl)))
1409 rest_of_decl_compilation (decl, NULL, 1, 1);
1413 if (TREE_CODE (decl) == FUNCTION_DECL
1414 && DECL_INITIAL (decl) != 0
1415 && DECL_STRUCT_FUNCTION (decl) != 0
1416 && DECL_STRUCT_FUNCTION (decl)->saved_for_inline
1417 && (flag_keep_inline_functions
1418 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1419 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1422 output_inline_function (decl);
1427 output_something = 1;
1431 return output_something;
1434 /* Issue appropriate warnings for the global declarations in VEC (of
1435 which there are LEN). Output debugging information for them. */
1438 check_global_declarations (tree *vec, int len)
1443 for (i = 0; i < len; i++)
1447 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1448 && ! TREE_ASM_WRITTEN (decl))
1449 /* Cancel the RTL for this decl so that, if debugging info
1450 output for global variables is still to come,
1451 this one will be omitted. */
1452 SET_DECL_RTL (decl, NULL_RTX);
1454 /* Warn about any function
1455 declared static but not defined.
1456 We don't warn about variables,
1457 because many programs have static variables
1458 that exist only to get some text into the object file. */
1459 if (TREE_CODE (decl) == FUNCTION_DECL
1460 && (warn_unused_function
1461 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1462 && DECL_INITIAL (decl) == 0
1463 && DECL_EXTERNAL (decl)
1464 && ! DECL_ARTIFICIAL (decl)
1465 && ! TREE_PUBLIC (decl))
1467 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1468 pedwarn ("%J'%F' used but never defined", decl, decl);
1470 warning ("%J'%F' declared `static' but never defined", decl, decl);
1471 /* This symbol is effectively an "extern" declaration now. */
1472 TREE_PUBLIC (decl) = 1;
1473 assemble_external (decl);
1476 /* Warn about static fns or vars defined but not used. */
1477 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
1478 /* We don't warn about "static const" variables because the
1479 "rcs_id" idiom uses that construction. */
1480 || (warn_unused_variable
1481 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
1482 && ! DECL_IN_SYSTEM_HEADER (decl)
1483 && ! TREE_USED (decl)
1484 /* The TREE_USED bit for file-scope decls is kept in the identifier,
1485 to handle multiple external decls in different scopes. */
1486 && ! TREE_USED (DECL_NAME (decl))
1487 && ! DECL_EXTERNAL (decl)
1488 && ! TREE_PUBLIC (decl)
1489 /* A volatile variable might be used in some non-obvious way. */
1490 && ! TREE_THIS_VOLATILE (decl)
1491 /* Global register variables must be declared to reserve them. */
1492 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
1493 /* Otherwise, ask the language. */
1494 && lang_hooks.decls.warn_unused_global (decl))
1495 warning ("%J'%D' defined but not used", decl, decl);
1497 /* Avoid confusing the debug information machinery when there are
1499 if (errorcount == 0 && sorrycount == 0)
1501 timevar_push (TV_SYMOUT);
1502 (*debug_hooks->global_decl) (decl);
1503 timevar_pop (TV_SYMOUT);
1508 /* Warn about a use of an identifier which was marked deprecated. */
1510 warn_deprecated_use (tree node)
1512 if (node == 0 || !warn_deprecated_decl)
1516 warning ("`%s' is deprecated (declared at %s:%d)",
1517 IDENTIFIER_POINTER (DECL_NAME (node)),
1518 DECL_SOURCE_FILE (node), DECL_SOURCE_LINE (node));
1519 else if (TYPE_P (node))
1521 const char *what = NULL;
1522 tree decl = TYPE_STUB_DECL (node);
1524 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
1525 what = IDENTIFIER_POINTER (TYPE_NAME (node));
1526 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
1527 && DECL_NAME (TYPE_NAME (node)))
1528 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
1533 warning ("`%s' is deprecated (declared at %s:%d)", what,
1534 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1536 warning ("`%s' is deprecated", what);
1539 warning ("type is deprecated (declared at %s:%d)",
1540 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1542 warning ("type is deprecated");
1546 /* Save the current INPUT_LOCATION on the top entry in the
1547 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
1548 INPUT_LOCATION accordingly. */
1551 push_srcloc (const char *file, int line)
1553 struct file_stack *fs;
1555 fs = xmalloc (sizeof (struct file_stack));
1556 fs->location = input_location;
1557 fs->next = input_file_stack;
1558 input_filename = file;
1560 input_file_stack = fs;
1561 input_file_stack_tick++;
1564 /* Pop the top entry off the stack of presently open source files.
1565 Restore the INPUT_LOCATION from the new topmost entry on the
1571 struct file_stack *fs;
1573 fs = input_file_stack;
1574 input_location = fs->location;
1575 input_file_stack = fs->next;
1577 input_file_stack_tick++;
1580 /* Compile an entire translation unit. Write a file of assembly
1581 output and various debugging dumps. */
1586 /* Initialize yet another pass. */
1588 init_final (main_input_filename);
1589 coverage_init (aux_base_name);
1591 timevar_push (TV_PARSE);
1593 /* Call the parser, which parses the entire file (calling
1594 rest_of_compilation for each function). */
1595 lang_hooks.parse_file (set_yydebug);
1597 /* In case there were missing block closers,
1598 get us back to the global binding level. */
1599 lang_hooks.clear_binding_stack ();
1601 /* Compilation is now finished except for writing
1602 what's left of the symbol table output. */
1603 timevar_pop (TV_PARSE);
1605 if (flag_syntax_only)
1608 lang_hooks.decls.final_write_globals ();
1610 cgraph_varpool_assemble_pending_decls ();
1612 /* This must occur after the loop to output deferred functions.
1613 Else the coverage initializer would not be emitted if all the
1614 functions in this compilation unit were deferred. */
1617 /* Write out any pending weak symbol declarations. */
1621 /* Do dbx symbols. */
1622 timevar_push (TV_SYMOUT);
1624 #ifdef DWARF2_UNWIND_INFO
1625 if (dwarf2out_do_frame ())
1626 dwarf2out_frame_finish ();
1629 (*debug_hooks->finish) (main_input_filename);
1630 timevar_pop (TV_SYMOUT);
1632 /* Output some stuff at end of file if nec. */
1634 dw2_output_indirect_constants ();
1636 targetm.asm_out.file_end ();
1638 /* Attach a special .ident directive to the end of the file to identify
1639 the version of GCC which compiled this code. The format of the .ident
1640 string is patterned after the ones produced by native SVR4 compilers. */
1643 fprintf (asm_out_file, "%s\"GCC: (GNU) %s\"\n",
1644 IDENT_ASM_OP, version_string);
1648 /* Display help for target options. */
1650 display_target_options (void)
1653 static bool displayed = false;
1655 /* Avoid double printing for --help --target-help. */
1661 if (ARRAY_SIZE (target_switches) > 1
1662 #ifdef TARGET_OPTIONS
1663 || ARRAY_SIZE (target_options) > 1
1671 printf (_("\nTarget specific options:\n"));
1673 for (i = ARRAY_SIZE (target_switches); i--;)
1675 const char *option = target_switches[i].name;
1676 const char *description = target_switches[i].description;
1678 if (option == NULL || *option == 0)
1680 else if (description == NULL)
1685 printf (_(" -m%-23s [undocumented]\n"), option);
1687 else if (*description != 0)
1688 doc += printf (" -m%-23s %s\n", option, _(description));
1691 #ifdef TARGET_OPTIONS
1692 for (i = ARRAY_SIZE (target_options); i--;)
1694 const char *option = target_options[i].prefix;
1695 const char *description = target_options[i].description;
1697 if (option == NULL || *option == 0)
1699 else if (description == NULL)
1704 printf (_(" -m%-23s [undocumented]\n"), option);
1706 else if (*description != 0)
1707 doc += printf (" -m%-23s %s\n", option, _(description));
1713 printf (_("\nThere are undocumented target specific options as well.\n"));
1715 printf (_(" They exist, but they are not documented.\n"));
1720 /* Parse a -d... command line switch. */
1723 decode_d_option (const char *arg)
1734 flag_print_asm_name = 1;
1737 flag_dump_rtl_in_asm = 1;
1738 flag_print_asm_name = 1;
1741 graph_dump_format = vcg;
1744 rtl_dump_and_exit = 1;
1749 case 'D': /* These are handled by the preprocessor. */
1753 setup_core_dumping();
1758 if (!enable_rtl_dump_file (c))
1759 warning ("unrecognized gcc debugging option: %c", c);
1764 /* Indexed by enum debug_info_type. */
1765 const char *const debug_type_names[] =
1767 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff", "vms"
1770 /* Decode -m switches. */
1771 /* Decode the switch -mNAME. */
1774 set_target_switch (const char *name)
1777 int valid_target_option = 0;
1779 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
1780 if (!strcmp (target_switches[j].name, name))
1782 if (target_switches[j].value < 0)
1783 target_flags &= ~-target_switches[j].value;
1785 target_flags |= target_switches[j].value;
1788 if (target_switches[j].value < 0)
1789 target_flags_explicit |= -target_switches[j].value;
1791 target_flags_explicit |= target_switches[j].value;
1793 valid_target_option = 1;
1796 #ifdef TARGET_OPTIONS
1797 if (!valid_target_option)
1798 for (j = 0; j < ARRAY_SIZE (target_options); j++)
1800 int len = strlen (target_options[j].prefix);
1801 if (target_options[j].value)
1803 if (!strcmp (target_options[j].prefix, name))
1805 *target_options[j].variable = target_options[j].value;
1806 valid_target_option = 1;
1811 if (!strncmp (target_options[j].prefix, name, len))
1813 *target_options[j].variable = name + len;
1814 valid_target_option = 1;
1820 if (!valid_target_option)
1821 error ("invalid option `%s'", name);
1824 /* Print version information to FILE.
1825 Each line begins with INDENT (for the case where FILE is the
1826 assembler output file). */
1829 print_version (FILE *file, const char *indent)
1832 #define __VERSION__ "[?]"
1836 "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n"
1838 "%s%s%s version %s (%s) compiled by CC.\n"
1840 , indent, *indent != 0 ? " " : "",
1841 lang_hooks.name, version_string, TARGET_NAME,
1842 indent, __VERSION__);
1843 fnotice (file, "%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n",
1844 indent, *indent != 0 ? " " : "",
1845 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1848 /* Print an option value and return the adjusted position in the line.
1849 ??? We don't handle error returns from fprintf (disk full); presumably
1850 other code will catch a disk full though. */
1853 print_single_switch (FILE *file, int pos, int max,
1854 const char *indent, const char *sep, const char *term,
1855 const char *type, const char *name)
1857 /* The ultrix fprintf returns 0 on success, so compute the result we want
1858 here since we need it for the following test. */
1859 int len = strlen (sep) + strlen (type) + strlen (name);
1864 fprintf (file, "%s", term);
1869 fprintf (file, "%s", indent);
1870 pos = strlen (indent);
1872 fprintf (file, "%s%s%s", sep, type, name);
1877 /* Print active target switches to FILE.
1878 POS is the current cursor position and MAX is the size of a "line".
1879 Each line begins with INDENT and ends with TERM.
1880 Each switch is separated from the next by SEP. */
1883 print_switch_values (FILE *file, int pos, int max,
1884 const char *indent, const char *sep, const char *term)
1889 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1890 that it can be printed below. This helps reproducibility. */
1893 /* Print the options as passed. */
1894 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
1895 _("options passed: "), "");
1897 for (p = &save_argv[1]; *p != NULL; p++)
1901 if (strcmp (*p, "-o") == 0)
1907 if (strcmp (*p, "-quiet") == 0)
1909 if (strcmp (*p, "-version") == 0)
1914 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
1917 fprintf (file, "%s", term);
1919 /* Print the -f and -m options that have been enabled.
1920 We don't handle language specific options but printing argv
1923 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
1924 _("options enabled: "), "");
1926 for (j = 0; j < ARRAY_SIZE (f_options); j++)
1927 if (*f_options[j].variable == f_options[j].on_value)
1928 pos = print_single_switch (file, pos, max, indent, sep, term,
1929 "-f", f_options[j].string);
1931 /* Print target specific options. */
1933 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
1934 if (target_switches[j].name[0] != '\0'
1935 && target_switches[j].value > 0
1936 && ((target_switches[j].value & target_flags)
1937 == target_switches[j].value))
1939 pos = print_single_switch (file, pos, max, indent, sep, term,
1940 "-m", target_switches[j].name);
1943 #ifdef TARGET_OPTIONS
1944 for (j = 0; j < ARRAY_SIZE (target_options); j++)
1945 if (*target_options[j].variable != NULL)
1948 sprintf (prefix, "-m%s", target_options[j].prefix);
1949 pos = print_single_switch (file, pos, max, indent, sep, term,
1950 prefix, *target_options[j].variable);
1954 fprintf (file, "%s", term);
1957 /* Open assembly code output file. Do this even if -fsyntax-only is
1958 on, because then the driver will have provided the name of a
1959 temporary file or bit bucket for us. NAME is the file specified on
1960 the command line, possibly NULL. */
1962 init_asm_output (const char *name)
1964 if (name == NULL && asm_file_name == 0)
1965 asm_out_file = stdout;
1968 if (asm_file_name == 0)
1970 int len = strlen (dump_base_name);
1971 char *dumpname = xmalloc (len + 6);
1972 memcpy (dumpname, dump_base_name, len + 1);
1973 strip_off_ending (dumpname, len);
1974 strcat (dumpname, ".s");
1975 asm_file_name = dumpname;
1977 if (!strcmp (asm_file_name, "-"))
1978 asm_out_file = stdout;
1980 asm_out_file = fopen (asm_file_name, "w+");
1981 if (asm_out_file == 0)
1982 fatal_error ("can't open %s for writing: %m", asm_file_name);
1985 #ifdef IO_BUFFER_SIZE
1986 setvbuf (asm_out_file, xmalloc (IO_BUFFER_SIZE),
1987 _IOFBF, IO_BUFFER_SIZE);
1990 if (!flag_syntax_only)
1992 targetm.asm_out.file_start ();
1994 #ifdef ASM_COMMENT_START
1995 if (flag_verbose_asm)
1997 /* Print the list of options in effect. */
1998 print_version (asm_out_file, ASM_COMMENT_START);
1999 print_switch_values (asm_out_file, 0, MAX_LINE,
2000 ASM_COMMENT_START, " ", "\n");
2001 /* Add a blank line here so it appears in assembler output but not
2003 fprintf (asm_out_file, "\n");
2009 /* Default version of get_pch_validity.
2010 By default, every flag difference is fatal; that will be mostly right for
2011 most targets, but completely right for very few. */
2014 default_get_pch_validity (size_t *len)
2016 #ifdef TARGET_OPTIONS
2021 *len = sizeof (target_flags) + 2;
2022 #ifdef TARGET_OPTIONS
2023 for (i = 0; i < ARRAY_SIZE (target_options); i++)
2026 if (*target_options[i].variable)
2027 *len += strlen (*target_options[i].variable);
2031 result = r = xmalloc (*len);
2035 memcpy (r, &target_flags, sizeof (target_flags));
2036 r += sizeof (target_flags);
2038 #ifdef TARGET_OPTIONS
2039 for (i = 0; i < ARRAY_SIZE (target_options); i++)
2041 const char *str = *target_options[i].variable;
2045 l = strlen (str) + 1;
2054 /* Default version of pch_valid_p. */
2057 default_pch_valid_p (const void *data_p, size_t len)
2059 const char *data = (const char *)data_p;
2060 const char *flag_that_differs = NULL;
2063 /* -fpic and -fpie also usually make a PCH invalid. */
2064 if (data[0] != flag_pic)
2065 return _("created and used with different settings of -fpic");
2066 if (data[1] != flag_pie)
2067 return _("created and used with different settings of -fpie");
2070 /* Check target_flags. */
2071 if (memcmp (data, &target_flags, sizeof (target_flags)) != 0)
2073 for (i = 0; i < ARRAY_SIZE (target_switches); i++)
2078 memcpy (&tf, data, sizeof (target_flags));
2080 bits = target_switches[i].value;
2083 if ((target_flags & bits) != (tf & bits))
2085 flag_that_differs = target_switches[i].name;
2091 data += sizeof (target_flags);
2092 len -= sizeof (target_flags);
2094 /* Check string options. */
2095 #ifdef TARGET_OPTIONS
2096 for (i = 0; i < ARRAY_SIZE (target_options); i++)
2098 const char *str = *target_options[i].variable;
2102 l = strlen (str) + 1;
2103 if (len < l || memcmp (data, str, l) != 0)
2105 flag_that_differs = target_options[i].prefix;
2118 asprintf (&r, _("created and used with differing settings of `-m%s'"),
2121 return _("out of memory");
2126 /* Default tree printer. Handles declarations only. */
2128 default_tree_printer (pretty_printer * pp, text_info *text)
2130 switch (*text->format_spec)
2136 tree t = va_arg (*text->args_ptr, tree);
2137 const char *n = DECL_NAME (t)
2138 ? lang_hooks.decl_printable_name (t, 2)
2149 /* Initialization of the front end environment, before command line
2150 options are parsed. Signal handlers, internationalization etc.
2151 ARGV0 is main's argv[0]. */
2153 general_init (const char *argv0)
2157 p = argv0 + strlen (argv0);
2158 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
2162 xmalloc_set_program_name (progname);
2166 gcc_init_libintl ();
2168 /* Initialize the diagnostics reporting machinery, so option parsing
2169 can give warnings and errors. */
2170 diagnostic_initialize (global_dc);
2171 /* Set a default printer. Language specific initializations will
2172 override it later. */
2173 pp_format_decoder (global_dc->printer) = &default_tree_printer;
2175 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
2177 signal (SIGSEGV, crash_signal);
2180 signal (SIGILL, crash_signal);
2183 signal (SIGBUS, crash_signal);
2186 signal (SIGABRT, crash_signal);
2188 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
2189 signal (SIGIOT, crash_signal);
2192 signal (SIGFPE, crash_signal);
2195 /* Other host-specific signal setup. */
2196 (*host_hooks.extra_signals)();
2198 /* Initialize the garbage-collector, string pools and tree type hash
2202 linemap_init (&line_table);
2205 /* Initialize register usage now so switches may override. */
2208 /* Register the language-independent parameters. */
2209 add_params (lang_independent_params, LAST_PARAM);
2211 /* This must be done after add_params but before argument processing. */
2212 init_ggc_heuristics();
2215 /* Process the options that have been parsed. */
2217 process_options (void)
2219 /* Allow the front end to perform consistency checks and do further
2220 initialization based on the command line options. This hook also
2221 sets the original filename if appropriate (e.g. foo.i -> foo.c)
2222 so we can correctly initialize debug output. */
2223 no_backend = lang_hooks.post_options (&main_input_filename);
2224 input_filename = main_input_filename;
2226 #ifdef OVERRIDE_OPTIONS
2227 /* Some machines may reject certain combinations of options. */
2231 /* Set aux_base_name if not already set. */
2234 else if (main_input_filename)
2236 char *name = xstrdup (lbasename (main_input_filename));
2238 strip_off_ending (name, strlen (name));
2239 aux_base_name = name;
2242 aux_base_name = "gccaux";
2244 /* Set up the align_*_log variables, defaulting them to 1 if they
2245 were still unset. */
2246 if (align_loops <= 0) align_loops = 1;
2247 if (align_loops_max_skip > align_loops || !align_loops)
2248 align_loops_max_skip = align_loops - 1;
2249 align_loops_log = floor_log2 (align_loops * 2 - 1);
2250 if (align_jumps <= 0) align_jumps = 1;
2251 if (align_jumps_max_skip > align_jumps || !align_jumps)
2252 align_jumps_max_skip = align_jumps - 1;
2253 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
2254 if (align_labels <= 0) align_labels = 1;
2255 align_labels_log = floor_log2 (align_labels * 2 - 1);
2256 if (align_labels_max_skip > align_labels || !align_labels)
2257 align_labels_max_skip = align_labels - 1;
2258 if (align_functions <= 0) align_functions = 1;
2259 align_functions_log = floor_log2 (align_functions * 2 - 1);
2261 /* Unrolling all loops implies that standard loop unrolling must also
2263 if (flag_unroll_all_loops)
2264 flag_unroll_loops = 1;
2266 if (flag_unroll_loops)
2268 flag_old_unroll_loops = 0;
2269 flag_old_unroll_all_loops = 0;
2272 if (flag_old_unroll_all_loops)
2273 flag_old_unroll_loops = 1;
2275 /* Old loop unrolling requires that strength_reduction be on also. Silently
2276 turn on strength reduction here if it isn't already on. Also, the loop
2277 unrolling code assumes that cse will be run after loop, so that must
2278 be turned on also. */
2279 if (flag_old_unroll_loops)
2281 flag_strength_reduce = 1;
2282 flag_rerun_cse_after_loop = 1;
2284 if (flag_unroll_loops || flag_peel_loops)
2285 flag_rerun_cse_after_loop = 1;
2287 if (flag_non_call_exceptions)
2288 flag_asynchronous_unwind_tables = 1;
2289 if (flag_asynchronous_unwind_tables)
2290 flag_unwind_tables = 1;
2292 /* Disable unit-at-a-time mode for frontends not supporting callgraph
2294 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
2295 flag_unit_at_a_time = 0;
2297 if (flag_value_profile_transformations)
2298 flag_profile_values = 1;
2300 /* Warn about options that are not supported on this machine. */
2301 #ifndef INSN_SCHEDULING
2302 if (flag_schedule_insns || flag_schedule_insns_after_reload)
2303 warning ("instruction scheduling not supported on this target machine");
2306 if (flag_delayed_branch)
2307 warning ("this target machine does not have delayed branches");
2310 user_label_prefix = USER_LABEL_PREFIX;
2311 if (flag_leading_underscore != -1)
2313 /* If the default prefix is more complicated than "" or "_",
2314 issue a warning and ignore this option. */
2315 if (user_label_prefix[0] == 0 ||
2316 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
2318 user_label_prefix = flag_leading_underscore ? "_" : "";
2321 warning ("-f%sleading-underscore not supported on this target machine",
2322 flag_leading_underscore ? "" : "no-");
2325 /* If we are in verbose mode, write out the version and maybe all the
2326 option flags in use. */
2329 print_version (stderr, "");
2331 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
2334 if (flag_syntax_only)
2336 write_symbols = NO_DEBUG;
2340 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
2342 if (debug_info_level == DINFO_LEVEL_NONE)
2343 write_symbols = NO_DEBUG;
2345 /* Now we know write_symbols, set up the debug hooks based on it.
2346 By default we do nothing for debug output. */
2347 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
2348 default_debug_hooks = &do_nothing_debug_hooks;
2349 #if defined(DBX_DEBUGGING_INFO)
2350 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
2351 default_debug_hooks = &dbx_debug_hooks;
2353 #if defined(XCOFF_DEBUGGING_INFO)
2354 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
2355 default_debug_hooks = &xcoff_debug_hooks;
2357 #ifdef SDB_DEBUGGING_INFO
2358 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
2359 default_debug_hooks = &sdb_debug_hooks;
2361 #ifdef DWARF2_DEBUGGING_INFO
2362 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
2363 default_debug_hooks = &dwarf2_debug_hooks;
2365 #ifdef VMS_DEBUGGING_INFO
2366 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
2367 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
2368 default_debug_hooks = &vmsdbg_debug_hooks;
2371 if (write_symbols == NO_DEBUG)
2372 debug_hooks = &do_nothing_debug_hooks;
2373 #if defined(DBX_DEBUGGING_INFO)
2374 else if (write_symbols == DBX_DEBUG)
2375 debug_hooks = &dbx_debug_hooks;
2377 #if defined(XCOFF_DEBUGGING_INFO)
2378 else if (write_symbols == XCOFF_DEBUG)
2379 debug_hooks = &xcoff_debug_hooks;
2381 #ifdef SDB_DEBUGGING_INFO
2382 else if (write_symbols == SDB_DEBUG)
2383 debug_hooks = &sdb_debug_hooks;
2385 #ifdef DWARF2_DEBUGGING_INFO
2386 else if (write_symbols == DWARF2_DEBUG)
2387 debug_hooks = &dwarf2_debug_hooks;
2389 #ifdef VMS_DEBUGGING_INFO
2390 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
2391 debug_hooks = &vmsdbg_debug_hooks;
2394 error ("target system does not support the \"%s\" debug format",
2395 debug_type_names[write_symbols]);
2397 /* Now we know which debug output will be used so we can set
2398 flag_var_tracking, flag_rename_registers and flag_web if the user has
2399 not specified them. */
2400 if (debug_info_level < DINFO_LEVEL_NORMAL
2401 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
2403 if (flag_var_tracking == 1)
2405 if (debug_info_level < DINFO_LEVEL_NORMAL)
2406 warning ("variable tracking requested, but useless unless "
2407 "producing debug info");
2409 warning ("variable tracking requested, but not supported "
2410 "by this debug format");
2412 flag_var_tracking = 0;
2415 if (flag_rename_registers == AUTODETECT_FLAG_VAR_TRACKING)
2416 flag_rename_registers = default_debug_hooks->var_location
2417 != do_nothing_debug_hooks.var_location;
2419 if (flag_web == AUTODETECT_FLAG_VAR_TRACKING)
2420 flag_web = optimize >= 2 && (default_debug_hooks->var_location
2421 != do_nothing_debug_hooks.var_location);
2423 if (flag_var_tracking == AUTODETECT_FLAG_VAR_TRACKING)
2424 flag_var_tracking = optimize >= 1;
2426 /* If auxiliary info generation is desired, open the output file.
2427 This goes in the same directory as the source file--unlike
2428 all the other output files. */
2429 if (flag_gen_aux_info)
2431 aux_info_file = fopen (aux_info_file_name, "w");
2432 if (aux_info_file == 0)
2433 fatal_error ("can't open %s: %m", aux_info_file_name);
2436 if (! targetm.have_named_sections)
2438 if (flag_function_sections)
2440 warning ("-ffunction-sections not supported for this target");
2441 flag_function_sections = 0;
2443 if (flag_data_sections)
2445 warning ("-fdata-sections not supported for this target");
2446 flag_data_sections = 0;
2450 if (flag_function_sections && profile_flag)
2452 warning ("-ffunction-sections disabled; it makes profiling impossible");
2453 flag_function_sections = 0;
2456 #ifndef HAVE_prefetch
2457 if (flag_prefetch_loop_arrays)
2459 warning ("-fprefetch-loop-arrays not supported for this target");
2460 flag_prefetch_loop_arrays = 0;
2463 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
2465 warning ("-fprefetch-loop-arrays not supported for this target (try -march switches)");
2466 flag_prefetch_loop_arrays = 0;
2470 /* This combination of options isn't handled for i386 targets and doesn't
2471 make much sense anyway, so don't allow it. */
2472 if (flag_prefetch_loop_arrays && optimize_size)
2474 warning ("-fprefetch-loop-arrays is not supported with -Os");
2475 flag_prefetch_loop_arrays = 0;
2478 #ifndef OBJECT_FORMAT_ELF
2479 if (flag_function_sections && write_symbols != NO_DEBUG)
2480 warning ("-ffunction-sections may affect debugging on some targets");
2483 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2484 if (flag_signaling_nans)
2485 flag_trapping_math = 1;
2488 /* Initialize the compiler back end. */
2492 init_adjust_machine_modes ();
2494 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2495 || debug_info_level == DINFO_LEVEL_VERBOSE
2496 #ifdef VMS_DEBUGGING_INFO
2497 /* Enable line number info for traceback. */
2498 || debug_info_level > DINFO_LEVEL_NONE
2500 || flag_test_coverage
2501 || warn_notreached);
2504 init_fake_stack_mems ();
2508 init_function_once ();
2509 init_varasm_once ();
2511 /* The following initialization functions need to generate rtl, so
2512 provide a dummy function context for them. */
2513 init_dummy_function_start ();
2515 if (flag_caller_saves)
2516 init_caller_save ();
2517 expand_dummy_function_end ();
2520 /* Language-dependent initialization. Returns nonzero on success. */
2522 lang_dependent_init (const char *name)
2524 if (dump_base_name == 0)
2525 dump_base_name = name ? name : "gccdump";
2527 /* Other front-end initialization. */
2528 if (lang_hooks.init () == 0)
2531 init_asm_output (name);
2533 /* These create various _DECL nodes, so need to be called after the
2534 front end is initialized. */
2537 init_optimization_passes ();
2539 /* The following initialization functions need to generate rtl, so
2540 provide a dummy function context for them. */
2541 init_dummy_function_start ();
2543 expand_dummy_function_end ();
2545 /* If dbx symbol table desired, initialize writing it and output the
2546 predefined types. */
2547 timevar_push (TV_SYMOUT);
2549 #ifdef DWARF2_UNWIND_INFO
2550 if (dwarf2out_do_frame ())
2551 dwarf2out_frame_init ();
2554 /* Now we have the correct original filename, we can initialize
2556 (*debug_hooks->init) (name);
2558 timevar_pop (TV_SYMOUT);
2563 /* Clean up: close opened files, etc. */
2568 /* Close the dump files. */
2569 if (flag_gen_aux_info)
2571 fclose (aux_info_file);
2573 unlink (aux_info_file_name);
2576 /* Close non-debugging input and output files. Take special care to note
2577 whether fclose returns an error, since the pages might still be on the
2578 buffer chain while the file is open. */
2582 if (ferror (asm_out_file) != 0)
2583 fatal_error ("error writing to %s: %m", asm_file_name);
2584 if (fclose (asm_out_file) != 0)
2585 fatal_error ("error closing %s: %m", asm_file_name);
2588 finish_optimization_passes ();
2592 ggc_print_statistics ();
2593 stringpool_statistics ();
2594 dump_tree_statistics ();
2595 dump_rtx_statistics ();
2596 dump_varray_statistics ();
2597 dump_alloc_pool_statistics ();
2598 dump_ggc_loc_statistics ();
2601 /* Free up memory for the benefit of leak detectors. */
2604 /* Language-specific end of compilation actions. */
2605 lang_hooks.finish ();
2608 /* Initialize the compiler, and compile the input file. */
2612 /* Initialize timing first. The C front ends read the main file in
2613 the post_options hook, and C++ does file timings. */
2614 if (time_report || !quiet_flag || flag_detailed_statistics)
2616 timevar_start (TV_TOTAL);
2620 /* Don't do any more if an error has already occurred. */
2623 /* Set up the back-end if requested. */
2627 /* Language-dependent initialization. Returns true on success. */
2628 if (lang_dependent_init (main_input_filename))
2634 /* Stop timing and print the times. */
2635 timevar_stop (TV_TOTAL);
2636 timevar_print (stderr);
2639 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2640 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2641 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2643 It is not safe to call this function more than once. */
2646 toplev_main (unsigned int argc, const char **argv)
2650 /* Initialization of GCC's environment, and diagnostics. */
2651 general_init (argv[0]);
2653 /* Parse the options and do minimal processing; basically just
2654 enough to default flags appropriately. */
2655 decode_options (argc, argv);
2659 /* Exit early if we can (e.g. -help). */
2660 if (!exit_after_options)
2663 if (errorcount || sorrycount)
2664 return (FATAL_EXIT_CODE);
2666 return (SUCCESS_EXIT_CODE);