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 but we do not do this yet because it triggers aborts in flow.c. */
273 int flag_rename_registers = 0;
274 int flag_cprop_registers = 0;
276 /* Nonzero for -pedantic switch: warn about anything
277 that standard spec forbids. */
281 /* Temporarily suppress certain warnings.
282 This is set while reading code from a system header file. */
284 int in_system_header = 0;
286 /* Don't print functions as they are compiled. -quiet. */
290 /* Print times taken by the various passes. -ftime-report. */
294 /* Print memory still in use at end of compilation (which may have little
295 to do with peak memory consumption). -fmem-report. */
299 /* Nonzero means to collect statistics which might be expensive
300 and to print them when we are done. */
301 int flag_detailed_statistics = 0;
303 /* A random sequence of characters, unless overridden by user. */
304 const char *flag_random_seed;
306 /* A local time stamp derived from the time of compilation. It will be
307 zero if the system cannot provide a time. It will be -1u, if the
308 user has specified a particular random seed. */
313 /* Nonzero means `char' should be signed. */
315 int flag_signed_char;
317 /* Nonzero means give an enum type only as many bytes as it needs. A value
318 of 2 means it has not yet been initialized. */
320 int flag_short_enums;
322 /* Nonzero for -fcaller-saves: allocate values in regs that need to
323 be saved across function calls, if that produces overall better code.
324 Optional now, so people can test it. */
326 int flag_caller_saves = 0;
328 /* Nonzero if structures and unions should be returned in memory.
330 This should only be defined if compatibility with another compiler or
331 with an ABI is needed, because it results in slower code. */
333 #ifndef DEFAULT_PCC_STRUCT_RETURN
334 #define DEFAULT_PCC_STRUCT_RETURN 1
337 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
339 int flag_pcc_struct_return = DEFAULT_PCC_STRUCT_RETURN;
341 /* Nonzero for -fforce-mem: load memory value into a register
342 before arithmetic on it. This makes better cse but slower compilation. */
344 int flag_force_mem = 0;
346 /* Nonzero for -fforce-addr: load memory address into a register before
347 reference to memory. This makes better cse but slower compilation. */
349 int flag_force_addr = 0;
351 /* Nonzero for -fdefer-pop: don't pop args after each function call;
352 instead save them up to pop many calls' args with one insns. */
354 int flag_defer_pop = 0;
356 /* Nonzero for -ffloat-store: don't allocate floats and doubles
357 in extended-precision registers. */
359 int flag_float_store = 0;
361 /* Nonzero for -fcse-follow-jumps:
362 have cse follow jumps to do a more extensive job. */
364 int flag_cse_follow_jumps;
366 /* Nonzero for -fcse-skip-blocks:
367 have cse follow a branch around a block. */
368 int flag_cse_skip_blocks;
370 /* Nonzero for -fexpensive-optimizations:
371 perform miscellaneous relatively-expensive optimizations. */
372 int flag_expensive_optimizations;
374 /* Nonzero for -fthread-jumps:
375 have jump optimize output of loop. */
377 int flag_thread_jumps;
379 /* Nonzero enables strength-reduction in loop.c. */
381 int flag_strength_reduce = 0;
383 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
384 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
385 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
388 int flag_old_unroll_loops;
390 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
391 This is generally not a win. */
393 int flag_old_unroll_all_loops;
395 /* Enables unrolling of simple loops in loop-unroll.c. */
396 int flag_unroll_loops;
398 /* Enables unrolling of all loops in loop-unroll.c. */
399 int flag_unroll_all_loops;
401 /* Nonzero enables loop peeling. */
404 /* Nonzero enables loop unswitching. */
405 int flag_unswitch_loops;
407 /* Nonzero enables prefetch optimizations for arrays in loops. */
409 int flag_prefetch_loop_arrays;
411 /* Nonzero forces all invariant computations in loops to be moved
414 int flag_move_all_movables = 0;
416 /* Nonzero forces all general induction variables in loops to be
419 int flag_reduce_all_givs = 0;
421 /* Nonzero to perform full register move optimization passes. This is the
424 int flag_regmove = 0;
426 /* Nonzero means don't put addresses of constant functions in registers.
427 Used for compiling the Unix kernel, where strange substitutions are
428 done on the assembly output. */
430 int flag_no_function_cse = 0;
432 /* Nonzero for -fomit-frame-pointer:
433 don't make a frame pointer in simple functions that don't require one. */
435 int flag_omit_frame_pointer = 0;
437 /* Nonzero means place each function into its own section on those platforms
438 which support arbitrary section names and unlimited numbers of sections. */
440 int flag_function_sections = 0;
442 /* ... and similar for data. */
444 int flag_data_sections = 0;
446 /* Nonzero to inhibit use of define_optimization peephole opts. */
448 int flag_no_peephole = 0;
450 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
452 int flag_optimize_sibling_calls = 0;
454 /* Nonzero means the front end generally wants `errno' maintained by math
455 operations, like built-in SQRT. */
457 int flag_errno_math = 1;
459 /* Nonzero means that unsafe floating-point math optimizations are allowed
460 for the sake of speed. IEEE compliance is not guaranteed, and operations
461 are allowed to assume that their arguments and results are "normal"
462 (e.g., nonnegative for SQRT). */
464 int flag_unsafe_math_optimizations = 0;
466 /* Nonzero means that no NaNs or +-Infs are expected. */
468 int flag_finite_math_only = 0;
470 /* Zero means that floating-point math operations cannot generate a
471 (user-visible) trap. This is the case, for example, in nonstop
472 IEEE 754 arithmetic. Trapping conditions include division by zero,
473 overflow, underflow, invalid and inexact, but does not include
474 operations on signaling NaNs (see below). */
476 int flag_trapping_math = 1;
478 /* Nonzero means disable transformations that assume default floating
479 point rounding behavior. */
481 int flag_rounding_math = 0;
483 /* Nonzero means disable transformations observable by signaling NaNs.
484 This option implies that any operation on an IEEE signaling NaN can
485 generate a (user-visible) trap. */
487 int flag_signaling_nans = 0;
489 /* 0 means straightforward implementation of complex divide acceptable.
490 1 means wide ranges of inputs must work for complex divide.
491 2 means C99-like requirements for complex divide (not yet implemented). */
493 int flag_complex_divide_method = 0;
495 /* Nonzero means just do syntax checking; don't output anything. */
497 int flag_syntax_only = 0;
499 /* Nonzero means performs web construction pass. When flag_web ==
500 AUTODETECT_FLAG_VAR_TRACKING it will be set according to optimize
501 and default_debug_hooks in process_options (). */
503 int flag_web = AUTODETECT_FLAG_VAR_TRACKING;
505 /* Nonzero means perform loop optimizer. */
507 int flag_loop_optimize;
509 /* Nonzero means perform crossjumping. */
511 int flag_crossjumping;
513 /* Nonzero means perform if conversion. */
515 int flag_if_conversion;
517 /* Nonzero means perform if conversion after reload. */
519 int flag_if_conversion2;
521 /* Nonzero means to use global dataflow analysis to eliminate
522 useless null pointer tests. */
524 int flag_delete_null_pointer_checks;
526 /* Nonzero means perform global CSE. */
530 /* Nonzero means to do the enhanced load motion during gcse, which trys
531 to hoist loads by not killing them when a store to the same location
534 int flag_gcse_lm = 1;
536 /* Nonzero means to perform store motion after gcse, which will try to
537 move stores closer to the exit block. Its not very effective without
540 int flag_gcse_sm = 1;
542 /* Nonzero if we want to perform redundant load after store elimination
545 int flag_gcse_las = 1;
547 /* Nonzero means perform global cse after register allocation. */
548 int flag_gcse_after_reload = 0;
550 /* Perform target register optimization before prologue / epilogue
553 int flag_branch_target_load_optimize = 0;
555 /* Perform target register optimization after prologue / epilogue
556 threading and jump2. */
558 int flag_branch_target_load_optimize2 = 0;
560 /* For the bt-load pass, nonzero means don't re-use branch target registers
561 in any basic block. */
563 int flag_btr_bb_exclusive;
565 /* Nonzero means to rerun cse after loop optimization. This increases
566 compilation time about 20% and picks up a few more common expressions. */
568 int flag_rerun_cse_after_loop;
570 /* Nonzero means to run loop optimizations twice. */
572 int flag_rerun_loop_opt;
574 /* Nonzero for -finline-functions: ok to inline functions that look like
575 good inline candidates. */
577 int flag_inline_functions;
579 /* Nonzero for -fkeep-inline-functions: even if we make a function
580 go inline everywhere, keep its definition around for debugging
583 int flag_keep_inline_functions;
585 /* Nonzero means that functions will not be inlined. */
587 int flag_no_inline = 2;
589 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
590 not just because the tree inliner turned us off. */
592 int flag_really_no_inline = 2;
594 /* Nonzero means that we should emit static const variables
595 regardless of whether or not optimization is turned on. */
597 int flag_keep_static_consts = 1;
599 /* Nonzero means we should be saving declaration info into a .X file. */
601 int flag_gen_aux_info = 0;
603 /* Specified name of aux-info file. */
605 const char *aux_info_file_name;
607 /* Nonzero means make the text shared if supported. */
609 int flag_shared_data;
611 /* Nonzero means schedule into delayed branch slots if supported. */
613 int flag_delayed_branch;
615 /* Nonzero if we are compiling pure (sharable) code.
616 Value is 1 if we are doing "small" pic; value is 2 if we're doing
621 /* Nonzero if we are compiling position independent code for executable.
622 The value is 1 if we are doing "small" pic; value is 2 if we're doing
627 /* Nonzero if we are compiling code for a shared library, zero for
632 /* Set to the default thread-local storage (tls) model to use. */
634 enum tls_model flag_tls_default = TLS_MODEL_GLOBAL_DYNAMIC;
636 /* Nonzero means generate extra code for exception handling and enable
637 exception handling. */
641 /* Nonzero means generate frame unwind info table when supported. */
643 int flag_unwind_tables = 0;
645 /* Nonzero means generate frame unwind info table exact at each insn
648 int flag_asynchronous_unwind_tables = 0;
650 /* Nonzero means don't place uninitialized global data in common storage
655 /* Nonzero means change certain warnings into errors.
656 Usually these are warnings about failure to conform to some standard. */
658 int flag_pedantic_errors = 0;
660 /* flag_schedule_insns means schedule insns within basic blocks (before
662 flag_schedule_insns_after_reload means schedule insns after
665 int flag_schedule_insns = 0;
666 int flag_schedule_insns_after_reload = 0;
668 /* When flag_schedule_insns_after_reload is set, use EBB scheduler. */
669 int flag_sched2_use_superblocks = 0;
671 /* When flag_schedule_insns_after_reload is set, construct traces and EBB
673 int flag_sched2_use_traces = 0;
675 /* The following flags have effect only for scheduling before register
678 flag_schedule_interblock means schedule insns across basic blocks.
679 flag_schedule_speculative means allow speculative motion of non-load insns.
680 flag_schedule_speculative_load means allow speculative motion of some
682 flag_schedule_speculative_load_dangerous allows speculative motion of more
685 int flag_schedule_interblock = 1;
686 int flag_schedule_speculative = 1;
687 int flag_schedule_speculative_load = 0;
688 int flag_schedule_speculative_load_dangerous = 0;
690 /* The following flags have an effect during scheduling after register
693 flag_sched_stalled_insns means that insns can be moved prematurely from the queue
694 of stalled insns into the ready list.
696 flag_sched_stalled_insns_dep controls how many insn groups will be examined
697 for a dependency on a stalled insn that is candidate for premature removal
698 from the queue of stalled insns into the ready list (has an effect only if
699 the flag 'sched_stalled_insns' is set). */
701 int flag_sched_stalled_insns = 0;
702 int flag_sched_stalled_insns_dep = 1;
704 int flag_single_precision_constant;
706 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
707 by a cheaper branch on a count register. */
708 int flag_branch_on_count_reg = 1;
710 /* -finhibit-size-directive inhibits output of .size for ELF.
711 This is used only for compiling crtstuff.c,
712 and it may be extended to other effects
713 needed for crtstuff.c on other systems. */
714 int flag_inhibit_size_directive = 0;
716 /* -fverbose-asm causes extra commentary information to be produced in
717 the generated assembly code (to make it more readable). This option
718 is generally only of use to those who actually need to read the
719 generated assembly code (perhaps while debugging the compiler itself).
720 -fno-verbose-asm, the default, causes the extra information
721 to be omitted and is useful when comparing two assembler files. */
723 int flag_verbose_asm = 0;
725 /* -dA causes debug commentary information to be produced in
726 the generated assembly code (to make it more readable). This option
727 is generally only of use to those who actually need to read the
728 generated assembly code (perhaps while debugging the compiler itself).
729 Currently, this switch is only used by dwarfout.c; however, it is intended
730 to be a catchall for printing debug information in the assembler file. */
732 int flag_debug_asm = 0;
734 /* -dP causes the rtl to be emitted as a comment in assembly. */
736 int flag_dump_rtl_in_asm = 0;
738 /* Nonzero means put zero initialized data in the bss section. */
739 int flag_zero_initialized_in_bss = 1;
741 /* Tag all structures with __attribute__(packed). */
742 int flag_pack_struct = 0;
744 /* Emit code to check for stack overflow; also may cause large objects
745 to be allocated dynamically. */
746 int flag_stack_check;
748 /* When non-NULL, indicates that whenever space is allocated on the
749 stack, the resulting stack pointer must not pass this
750 address---that is, for stacks that grow downward, the stack pointer
751 must always be greater than or equal to this address; for stacks
752 that grow upward, the stack pointer must be less than this address.
753 At present, the rtx may be either a REG or a SYMBOL_REF, although
754 the support provided depends on the backend. */
757 /* 0 if pointer arguments may alias each other. True in C.
758 1 if pointer arguments may not alias each other but may alias
760 2 if pointer arguments may not alias each other and may not
761 alias global variables. True in Fortran.
762 This defaults to 0 for C. */
763 int flag_argument_noalias = 0;
765 /* Nonzero if we should do (language-dependent) alias analysis.
766 Typically, this analysis will assume that expressions of certain
767 types do not alias expressions of certain other types. Only used
768 if alias analysis (in general) is enabled. */
769 int flag_strict_aliasing = 0;
771 /* Instrument functions with calls at entry and exit, for profiling. */
772 int flag_instrument_function_entry_exit = 0;
774 /* Nonzero means ignore `#ident' directives. 0 means handle them.
775 On SVR4 targets, it also controls whether or not to emit a
776 string identifying the compiler. */
778 int flag_no_ident = 0;
780 /* This will perform a peephole pass before sched2. */
781 int flag_peephole2 = 0;
783 /* This will try to guess branch probabilities. */
784 int flag_guess_branch_prob = 0;
786 /* -fcheck-bounds causes gcc to generate array bounds checks.
787 For C, C++, ObjC: defaults to off.
788 For Java: defaults to on.
789 For Fortran: defaults to off. */
790 int flag_bounds_check = 0;
792 /* This will attempt to merge constant section constants, if 1 only
793 string constants and constants from constant pool, if 2 also constant
795 int flag_merge_constants = 1;
797 /* If one, renumber instruction UIDs to reduce the number of
798 unused UIDs if there are a lot of instructions. If greater than
799 one, unconditionally renumber instruction UIDs. */
800 int flag_renumber_insns = 1;
802 /* If nonzero, use the graph coloring register allocator. */
803 int flag_new_regalloc = 0;
805 /* Nonzero if we perform superblock formation. */
809 /* Nonzero if we perform whole unit at a time compilation. */
811 int flag_unit_at_a_time = 0;
813 /* Nonzero if we should track variables. When
814 flag_var_tracking == AUTODETECT_FLAG_VAR_TRACKING it will be set according
815 to optimize, debug_info_level and debug_hooks in process_options (). */
816 int flag_var_tracking = AUTODETECT_FLAG_VAR_TRACKING;
818 /* Values of the -falign-* flags: how much to align labels in code.
819 0 means `use default', 1 means `don't align'.
820 For each variable, there is an _log variant which is the power
821 of two not less than the variable, for .align output. */
825 int align_loops_max_skip;
828 int align_jumps_max_skip;
830 int align_labels_log;
831 int align_labels_max_skip;
833 int align_functions_log;
835 /* Like align_functions_log above, but used by front-ends to force the
836 minimum function alignment. Zero means no alignment is forced. */
837 int force_align_functions_log;
841 const char *const string;
845 lang_independent_options;
847 /* Nonzero if signed arithmetic overflow should trap. */
850 /* Nonzero if signed arithmetic overflow should wrap around. */
853 /* Nonzero if subexpressions must be evaluated from left-to-right. */
854 int flag_evaluation_order = 0;
856 /* Add or remove a leading underscore from user symbols. */
857 int flag_leading_underscore = -1;
859 /* The version of the C++ ABI in use. The following values are
862 0: The version of the ABI believed most conformant with the
863 C++ ABI specification. This ABI may change as bugs are
864 discovered and fixed. Therefore, 0 will not necessarily
865 indicate the same ABI in different versions of G++.
867 1: The version of the ABI first used in G++ 3.2.
869 2: The version of the ABI first used in G++ 3.4.
871 Additional positive integers will be assigned as new versions of
872 the ABI become the default version of the ABI. */
874 int flag_abi_version = 2;
876 /* The user symbol prefix after having resolved same. */
877 const char *user_label_prefix;
879 static const param_info lang_independent_params[] = {
880 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \
881 { OPTION, DEFAULT, HELP },
882 #include "params.def"
887 /* Table of language-independent -f options.
888 STRING is the option name. VARIABLE is the address of the variable.
889 ON_VALUE is the value to store in VARIABLE
890 if `-fSTRING' is seen as an option.
891 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
893 static const lang_independent_options f_options[] =
895 {"eliminate-dwarf2-dups", &flag_eliminate_dwarf2_dups, 1 },
896 {"eliminate-unused-debug-symbols", &flag_debug_only_used_symbols, 1 },
897 {"eliminate-unused-debug-types", &flag_eliminate_unused_debug_types, 1 },
898 {"float-store", &flag_float_store, 1 },
899 {"defer-pop", &flag_defer_pop, 1 },
900 {"omit-frame-pointer", &flag_omit_frame_pointer, 1 },
901 {"optimize-sibling-calls", &flag_optimize_sibling_calls, 1 },
902 {"tracer", &flag_tracer, 1 },
903 {"unit-at-a-time", &flag_unit_at_a_time, 1 },
904 {"cse-follow-jumps", &flag_cse_follow_jumps, 1 },
905 {"cse-skip-blocks", &flag_cse_skip_blocks, 1 },
906 {"expensive-optimizations", &flag_expensive_optimizations, 1 },
907 {"thread-jumps", &flag_thread_jumps, 1 },
908 {"strength-reduce", &flag_strength_reduce, 1 },
909 {"unroll-loops", &flag_unroll_loops, 1 },
910 {"unroll-all-loops", &flag_unroll_all_loops, 1 },
911 {"old-unroll-loops", &flag_old_unroll_loops, 1 },
912 {"old-unroll-all-loops", &flag_old_unroll_all_loops, 1 },
913 {"peel-loops", &flag_peel_loops, 1 },
914 {"unswitch-loops", &flag_unswitch_loops, 1 },
915 {"prefetch-loop-arrays", &flag_prefetch_loop_arrays, 1 },
916 {"move-all-movables", &flag_move_all_movables, 1 },
917 {"reduce-all-givs", &flag_reduce_all_givs, 1 },
918 {"peephole", &flag_no_peephole, 0 },
919 {"force-mem", &flag_force_mem, 1 },
920 {"force-addr", &flag_force_addr, 1 },
921 {"function-cse", &flag_no_function_cse, 0 },
922 {"inline-functions", &flag_inline_functions, 1 },
923 {"keep-inline-functions", &flag_keep_inline_functions, 1 },
924 {"inline", &flag_no_inline, 0 },
925 {"keep-static-consts", &flag_keep_static_consts, 1 },
926 {"syntax-only", &flag_syntax_only, 1 },
927 {"shared-data", &flag_shared_data, 1 },
928 {"caller-saves", &flag_caller_saves, 1 },
929 {"pcc-struct-return", &flag_pcc_struct_return, 1 },
930 {"reg-struct-return", &flag_pcc_struct_return, 0 },
931 {"delayed-branch", &flag_delayed_branch, 1 },
932 {"web", &flag_web, 1},
933 {"gcse", &flag_gcse, 1 },
934 {"gcse-lm", &flag_gcse_lm, 1 },
935 {"gcse-sm", &flag_gcse_sm, 1 },
936 {"gcse-las", &flag_gcse_las, 1 },
937 {"gcse-after-reload", &flag_gcse_after_reload, 1},
938 {"branch-target-load-optimize", &flag_branch_target_load_optimize, 1 },
939 {"branch-target-load-optimize2", &flag_branch_target_load_optimize2, 1 },
940 {"btr-bb-exclusive", &flag_btr_bb_exclusive, 1 },
941 {"loop-optimize", &flag_loop_optimize, 1 },
942 {"crossjumping", &flag_crossjumping, 1 },
943 {"if-conversion", &flag_if_conversion, 1 },
944 {"if-conversion2", &flag_if_conversion2, 1 },
945 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop, 1 },
946 {"rerun-loop-opt", &flag_rerun_loop_opt, 1 },
947 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks, 1 },
948 {"schedule-insns", &flag_schedule_insns, 1 },
949 {"schedule-insns2", &flag_schedule_insns_after_reload, 1 },
950 {"sched-interblock",&flag_schedule_interblock, 1 },
951 {"sched-spec",&flag_schedule_speculative, 1 },
952 {"sched-spec-load",&flag_schedule_speculative_load, 1 },
953 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous, 1 },
954 {"sched-stalled-insns", &flag_sched_stalled_insns, 0 },
955 {"sched-stalled-insns-dep", &flag_sched_stalled_insns_dep, 1 },
956 {"sched2-use-superblocks", &flag_sched2_use_superblocks, 1 },
957 {"sched2-use-traces", &flag_sched2_use_traces, 1 },
958 {"branch-count-reg",&flag_branch_on_count_reg, 1 },
959 {"pic", &flag_pic, 1 },
960 {"PIC", &flag_pic, 2 },
961 {"pie", &flag_pie, 1 },
962 {"PIE", &flag_pie, 2 },
963 {"exceptions", &flag_exceptions, 1 },
964 {"unwind-tables", &flag_unwind_tables, 1 },
965 {"asynchronous-unwind-tables", &flag_asynchronous_unwind_tables, 1 },
966 {"non-call-exceptions", &flag_non_call_exceptions, 1 },
967 {"profile-arcs", &profile_arc_flag, 1 },
968 {"profile-values", &flag_profile_values, 1 },
969 {"vpt", &flag_value_profile_transformations, 1 },
970 {"test-coverage", &flag_test_coverage, 1 },
971 {"branch-probabilities", &flag_branch_probabilities, 1 },
972 {"profile", &profile_flag, 1 },
973 {"reorder-blocks", &flag_reorder_blocks, 1 },
974 {"reorder-blocks-and-partition", &flag_reorder_blocks_and_partition, 1},
975 {"reorder-functions", &flag_reorder_functions, 1 },
976 {"rename-registers", &flag_rename_registers, 1 },
977 {"cprop-registers", &flag_cprop_registers, 1 },
978 {"common", &flag_no_common, 0 },
979 {"inhibit-size-directive", &flag_inhibit_size_directive, 1 },
980 {"function-sections", &flag_function_sections, 1 },
981 {"data-sections", &flag_data_sections, 1 },
982 {"verbose-asm", &flag_verbose_asm, 1 },
983 {"regmove", &flag_regmove, 1 },
984 {"optimize-register-move", &flag_regmove, 1 },
985 {"pack-struct", &flag_pack_struct, 1 },
986 {"stack-check", &flag_stack_check, 1 },
987 {"argument-alias", &flag_argument_noalias, 0 },
988 {"argument-noalias", &flag_argument_noalias, 1 },
989 {"argument-noalias-global", &flag_argument_noalias, 2 },
990 {"strict-aliasing", &flag_strict_aliasing, 1 },
991 {"align-loops", &align_loops, 0 },
992 {"align-jumps", &align_jumps, 0 },
993 {"align-labels", &align_labels, 0 },
994 {"align-functions", &align_functions, 0 },
995 {"merge-constants", &flag_merge_constants, 1 },
996 {"merge-all-constants", &flag_merge_constants, 2 },
997 {"dump-unnumbered", &flag_dump_unnumbered, 1 },
998 {"instrument-functions", &flag_instrument_function_entry_exit, 1 },
999 {"zero-initialized-in-bss", &flag_zero_initialized_in_bss, 1 },
1000 {"leading-underscore", &flag_leading_underscore, 1 },
1001 {"ident", &flag_no_ident, 0 },
1002 { "peephole2", &flag_peephole2, 1 },
1003 {"finite-math-only", &flag_finite_math_only, 1 },
1004 { "guess-branch-probability", &flag_guess_branch_prob, 1 },
1005 {"math-errno", &flag_errno_math, 1 },
1006 {"trapping-math", &flag_trapping_math, 1 },
1007 {"rounding-math", &flag_rounding_math, 1 },
1008 {"unsafe-math-optimizations", &flag_unsafe_math_optimizations, 1 },
1009 {"signaling-nans", &flag_signaling_nans, 1 },
1010 {"bounds-check", &flag_bounds_check, 1 },
1011 {"single-precision-constant", &flag_single_precision_constant, 1 },
1012 {"time-report", &time_report, 1 },
1013 {"mem-report", &mem_report, 1 },
1014 { "trapv", &flag_trapv, 1 },
1015 { "wrapv", &flag_wrapv, 1 },
1016 { "new-ra", &flag_new_regalloc, 1 },
1017 { "var-tracking", &flag_var_tracking, 1}
1020 /* Here is a table, controlled by the tm.h file, listing each -m switch
1021 and which bits in `target_switches' it should set or clear.
1022 If VALUE is positive, it is bits to set.
1023 If VALUE is negative, -VALUE is bits to clear.
1024 (The sign bit is not used so there is no confusion.) */
1028 const char *const name;
1030 const char *const description;
1032 target_switches[] = TARGET_SWITCHES;
1034 /* This table is similar, but allows the switch to have a value. */
1036 #ifdef TARGET_OPTIONS
1039 const char *const prefix;
1040 const char **const variable;
1041 const char *const description;
1042 const char *const value;
1044 target_options[] = TARGET_OPTIONS;
1047 /* Nonzero means warn about function definitions that default the return type
1048 or that use a null return and have a return-type other than void. */
1050 int warn_return_type;
1052 /* Output files for assembler code (real compiler output)
1053 and debugging dumps. */
1056 FILE *aux_info_file;
1057 FILE *dump_file = NULL;
1058 FILE *cgraph_dump_file = NULL;
1060 /* The current working directory of a translation. It's generally the
1061 directory from which compilation was initiated, but a preprocessed
1062 file may specify the original directory in which it was
1065 static const char *src_pwd;
1067 /* Initialize src_pwd with the given string, and return true. If it
1068 was already initialized, return false. As a special case, it may
1069 be called with a NULL argument to test whether src_pwd has NOT been
1073 set_src_pwd (const char *pwd)
1077 if (strcmp (src_pwd, pwd) == 0)
1083 src_pwd = xstrdup (pwd);
1087 /* Return the directory from which the translation unit was initiated,
1088 in case set_src_pwd() was not called before to assign it a
1095 src_pwd = getpwd ();
1100 /* Called when the start of a function definition is parsed,
1101 this function prints on stderr the name of the function. */
1103 announce_function (tree decl)
1107 if (rtl_dump_and_exit)
1108 verbatim ("%s ", IDENTIFIER_POINTER (DECL_NAME (decl)));
1110 verbatim (" %s", lang_hooks.decl_printable_name (decl, 2));
1112 pp_needs_newline (global_dc->printer) = true;
1113 diagnostic_set_last_function (global_dc);
1117 /* Set up a default flag_random_seed and local_tick, unless the user
1118 already specified one. */
1123 if (!flag_random_seed)
1125 unsigned HOST_WIDE_INT value;
1126 static char random_seed[HOST_BITS_PER_WIDE_INT / 4 + 3];
1128 /* Get some more or less random data. */
1129 #ifdef HAVE_GETTIMEOFDAY
1133 gettimeofday (&tv, NULL);
1134 local_tick = tv.tv_sec * 1000 + tv.tv_usec / 1000;
1138 time_t now = time (NULL);
1140 if (now != (time_t)-1)
1141 local_tick = (unsigned) now;
1144 value = local_tick ^ getpid ();
1146 sprintf (random_seed, HOST_WIDE_INT_PRINT_HEX, value);
1147 flag_random_seed = random_seed;
1149 else if (!local_tick)
1154 /* Decode the string P as an integral parameter.
1155 If the string is indeed an integer return its numeric value else
1156 issue an Invalid Option error for the option PNAME and return DEFVAL.
1157 If PNAME is zero just return DEFVAL, do not call error. */
1160 read_integral_parameter (const char *p, const char *pname, const int defval)
1162 const char *endp = p;
1166 if (ISDIGIT (*endp))
1175 error ("invalid option argument `%s'", pname);
1182 /* Return the logarithm of X, base 2, considering X unsigned,
1183 if X is a power of 2. Otherwise, returns -1.
1185 This should be used via the `exact_log2' macro. */
1188 exact_log2_wide (unsigned HOST_WIDE_INT x)
1191 /* Test for 0 or a power of 2. */
1192 if (x == 0 || x != (x & -x))
1194 while ((x >>= 1) != 0)
1199 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1200 If X is 0, return -1.
1202 This should be used via the floor_log2 macro. */
1205 floor_log2_wide (unsigned HOST_WIDE_INT x)
1214 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1215 into ICE messages, which is much more user friendly. In case the
1216 error printer crashes, reset the signal to prevent infinite recursion. */
1219 crash_signal (int signo)
1221 signal (signo, SIG_DFL);
1222 internal_error ("%s", strsignal (signo));
1225 /* Arrange to dump core on error. (The regular error message is still
1226 printed first, except in the case of abort().) */
1229 setup_core_dumping (void)
1232 signal (SIGABRT, SIG_DFL);
1234 #if defined(HAVE_SETRLIMIT)
1237 if (getrlimit (RLIMIT_CORE, &rlim) != 0)
1238 fatal_error ("getting core file size maximum limit: %m");
1239 rlim.rlim_cur = rlim.rlim_max;
1240 if (setrlimit (RLIMIT_CORE, &rlim) != 0)
1241 fatal_error ("setting core file size limit to maximum: %m");
1244 diagnostic_abort_on_error (global_dc);
1248 /* Strip off a legitimate source ending from the input string NAME of
1249 length LEN. Rather than having to know the names used by all of
1250 our front ends, we strip off an ending of a period followed by
1251 up to five characters. (Java uses ".class".) */
1254 strip_off_ending (char *name, int len)
1257 for (i = 2; i < 6 && len > i; i++)
1259 if (name[len - i] == '.')
1261 name[len - i] = '\0';
1267 /* Output a quoted string. */
1270 output_quoted_string (FILE *asm_file, const char *string)
1272 #ifdef OUTPUT_QUOTED_STRING
1273 OUTPUT_QUOTED_STRING (asm_file, string);
1277 putc ('\"', asm_file);
1278 while ((c = *string++) != 0)
1282 if (c == '\"' || c == '\\')
1283 putc ('\\', asm_file);
1287 fprintf (asm_file, "\\%03o", (unsigned char) c);
1289 putc ('\"', asm_file);
1293 /* Output a file name in the form wanted by System V. */
1296 output_file_directive (FILE *asm_file, const char *input_name)
1301 if (input_name == NULL)
1302 input_name = "<stdin>";
1304 len = strlen (input_name);
1305 na = input_name + len;
1307 /* NA gets INPUT_NAME sans directory names. */
1308 while (na > input_name)
1310 if (IS_DIR_SEPARATOR (na[-1]))
1315 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1316 ASM_OUTPUT_SOURCE_FILENAME (asm_file, na);
1318 fprintf (asm_file, "\t.file\t");
1319 output_quoted_string (asm_file, na);
1320 fputc ('\n', asm_file);
1324 /* Do any final processing required for the declarations in VEC, of
1325 which there are LEN. We write out inline functions and variables
1326 that have been deferred until this point, but which are required.
1327 Returns nonzero if anything was put out. */
1330 wrapup_global_declarations (tree *vec, int len)
1335 int output_something = 0;
1337 for (i = 0; i < len; i++)
1341 /* We're not deferring this any longer. Assignment is
1342 conditional to avoid needlessly dirtying PCH pages. */
1343 if (DECL_DEFER_OUTPUT (decl) != 0)
1344 DECL_DEFER_OUTPUT (decl) = 0;
1346 if (TREE_CODE (decl) == VAR_DECL && DECL_SIZE (decl) == 0)
1347 lang_hooks.finish_incomplete_decl (decl);
1350 /* Now emit any global variables or functions that we have been
1351 putting off. We need to loop in case one of the things emitted
1352 here references another one which comes earlier in the list. */
1356 for (i = 0; i < len; i++)
1360 if (TREE_ASM_WRITTEN (decl) || DECL_EXTERNAL (decl))
1363 /* Don't write out static consts, unless we still need them.
1365 We also keep static consts if not optimizing (for debugging),
1366 unless the user specified -fno-keep-static-consts.
1367 ??? They might be better written into the debug information.
1368 This is possible when using DWARF.
1370 A language processor that wants static constants to be always
1371 written out (even if it is not used) is responsible for
1372 calling rest_of_decl_compilation itself. E.g. the C front-end
1373 calls rest_of_decl_compilation from finish_decl.
1374 One motivation for this is that is conventional in some
1375 environments to write things like:
1376 static const char rcsid[] = "... version string ...";
1377 intending to force the string to be in the executable.
1379 A language processor that would prefer to have unneeded
1380 static constants "optimized away" would just defer writing
1381 them out until here. E.g. C++ does this, because static
1382 constants are often defined in header files.
1384 ??? A tempting alternative (for both C and C++) would be
1385 to force a constant to be written if and only if it is
1386 defined in a main file, as opposed to an include file. */
1388 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl))
1392 if (flag_unit_at_a_time
1393 && cgraph_varpool_node (decl)->finalized)
1395 else if ((flag_unit_at_a_time && !cgraph_global_info_ready)
1396 && (TREE_USED (decl)
1397 || TREE_USED (DECL_ASSEMBLER_NAME (decl))))
1399 else if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1401 else if (DECL_COMDAT (decl))
1403 else if (TREE_READONLY (decl) && !TREE_PUBLIC (decl)
1404 && (optimize || !flag_keep_static_consts
1405 || DECL_ARTIFICIAL (decl)))
1411 rest_of_decl_compilation (decl, NULL, 1, 1);
1415 if (TREE_CODE (decl) == FUNCTION_DECL
1416 && DECL_INITIAL (decl) != 0
1417 && DECL_STRUCT_FUNCTION (decl) != 0
1418 && DECL_STRUCT_FUNCTION (decl)->saved_for_inline
1419 && (flag_keep_inline_functions
1420 || (TREE_PUBLIC (decl) && !DECL_COMDAT (decl))
1421 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl))))
1424 output_inline_function (decl);
1429 output_something = 1;
1433 return output_something;
1436 /* Issue appropriate warnings for the global declarations in VEC (of
1437 which there are LEN). Output debugging information for them. */
1440 check_global_declarations (tree *vec, int len)
1445 for (i = 0; i < len; i++)
1449 if (TREE_CODE (decl) == VAR_DECL && TREE_STATIC (decl)
1450 && ! TREE_ASM_WRITTEN (decl))
1451 /* Cancel the RTL for this decl so that, if debugging info
1452 output for global variables is still to come,
1453 this one will be omitted. */
1454 SET_DECL_RTL (decl, NULL_RTX);
1456 /* Warn about any function
1457 declared static but not defined.
1458 We don't warn about variables,
1459 because many programs have static variables
1460 that exist only to get some text into the object file. */
1461 if (TREE_CODE (decl) == FUNCTION_DECL
1462 && (warn_unused_function
1463 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1464 && DECL_INITIAL (decl) == 0
1465 && DECL_EXTERNAL (decl)
1466 && ! DECL_ARTIFICIAL (decl)
1467 && ! TREE_PUBLIC (decl))
1469 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl)))
1470 pedwarn ("%J'%F' used but never defined", decl, decl);
1472 warning ("%J'%F' declared `static' but never defined", decl, decl);
1473 /* This symbol is effectively an "extern" declaration now. */
1474 TREE_PUBLIC (decl) = 1;
1475 assemble_external (decl);
1478 /* Warn about static fns or vars defined but not used. */
1479 if (((warn_unused_function && TREE_CODE (decl) == FUNCTION_DECL)
1480 /* We don't warn about "static const" variables because the
1481 "rcs_id" idiom uses that construction. */
1482 || (warn_unused_variable
1483 && TREE_CODE (decl) == VAR_DECL && ! TREE_READONLY (decl)))
1484 && ! DECL_IN_SYSTEM_HEADER (decl)
1485 && ! TREE_USED (decl)
1486 /* The TREE_USED bit for file-scope decls is kept in the identifier,
1487 to handle multiple external decls in different scopes. */
1488 && ! TREE_USED (DECL_NAME (decl))
1489 && ! DECL_EXTERNAL (decl)
1490 && ! TREE_PUBLIC (decl)
1491 /* A volatile variable might be used in some non-obvious way. */
1492 && ! TREE_THIS_VOLATILE (decl)
1493 /* Global register variables must be declared to reserve them. */
1494 && ! (TREE_CODE (decl) == VAR_DECL && DECL_REGISTER (decl))
1495 /* Otherwise, ask the language. */
1496 && lang_hooks.decls.warn_unused_global (decl))
1497 warning ("%J'%D' defined but not used", decl, decl);
1499 /* Avoid confusing the debug information machinery when there are
1501 if (errorcount == 0 && sorrycount == 0)
1503 timevar_push (TV_SYMOUT);
1504 (*debug_hooks->global_decl) (decl);
1505 timevar_pop (TV_SYMOUT);
1510 /* Warn about a use of an identifier which was marked deprecated. */
1512 warn_deprecated_use (tree node)
1514 if (node == 0 || !warn_deprecated_decl)
1518 warning ("`%s' is deprecated (declared at %s:%d)",
1519 IDENTIFIER_POINTER (DECL_NAME (node)),
1520 DECL_SOURCE_FILE (node), DECL_SOURCE_LINE (node));
1521 else if (TYPE_P (node))
1523 const char *what = NULL;
1524 tree decl = TYPE_STUB_DECL (node);
1526 if (TREE_CODE (TYPE_NAME (node)) == IDENTIFIER_NODE)
1527 what = IDENTIFIER_POINTER (TYPE_NAME (node));
1528 else if (TREE_CODE (TYPE_NAME (node)) == TYPE_DECL
1529 && DECL_NAME (TYPE_NAME (node)))
1530 what = IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node)));
1535 warning ("`%s' is deprecated (declared at %s:%d)", what,
1536 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1538 warning ("`%s' is deprecated", what);
1541 warning ("type is deprecated (declared at %s:%d)",
1542 DECL_SOURCE_FILE (decl), DECL_SOURCE_LINE (decl));
1544 warning ("type is deprecated");
1548 /* Save the current INPUT_LOCATION on the top entry in the
1549 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
1550 INPUT_LOCATION accordingly. */
1553 push_srcloc (const char *file, int line)
1555 struct file_stack *fs;
1557 fs = xmalloc (sizeof (struct file_stack));
1558 fs->location = input_location;
1559 fs->next = input_file_stack;
1560 input_filename = file;
1562 input_file_stack = fs;
1563 input_file_stack_tick++;
1566 /* Pop the top entry off the stack of presently open source files.
1567 Restore the INPUT_LOCATION from the new topmost entry on the
1573 struct file_stack *fs;
1575 fs = input_file_stack;
1576 input_location = fs->location;
1577 input_file_stack = fs->next;
1579 input_file_stack_tick++;
1582 /* Compile an entire translation unit. Write a file of assembly
1583 output and various debugging dumps. */
1588 /* Initialize yet another pass. */
1590 init_final (main_input_filename);
1591 coverage_init (aux_base_name);
1593 timevar_push (TV_PARSE);
1595 /* Call the parser, which parses the entire file (calling
1596 rest_of_compilation for each function). */
1597 lang_hooks.parse_file (set_yydebug);
1599 /* In case there were missing block closers,
1600 get us back to the global binding level. */
1601 lang_hooks.clear_binding_stack ();
1603 /* Compilation is now finished except for writing
1604 what's left of the symbol table output. */
1605 timevar_pop (TV_PARSE);
1607 if (flag_syntax_only)
1610 lang_hooks.decls.final_write_globals ();
1612 cgraph_varpool_assemble_pending_decls ();
1614 /* This must occur after the loop to output deferred functions.
1615 Else the coverage initializer would not be emitted if all the
1616 functions in this compilation unit were deferred. */
1619 /* Write out any pending weak symbol declarations. */
1623 /* Do dbx symbols. */
1624 timevar_push (TV_SYMOUT);
1626 #ifdef DWARF2_UNWIND_INFO
1627 if (dwarf2out_do_frame ())
1628 dwarf2out_frame_finish ();
1631 (*debug_hooks->finish) (main_input_filename);
1632 timevar_pop (TV_SYMOUT);
1634 /* Output some stuff at end of file if nec. */
1636 dw2_output_indirect_constants ();
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);
1647 /* This must be at the end. Some target ports emit end of file directives
1648 into the assembly file here, and hence we can not output anything to the
1649 assembly file after this point. */
1650 targetm.asm_out.file_end ();
1653 /* Display help for target options. */
1655 display_target_options (void)
1658 static bool displayed = false;
1660 /* Avoid double printing for --help --target-help. */
1666 if (ARRAY_SIZE (target_switches) > 1
1667 #ifdef TARGET_OPTIONS
1668 || ARRAY_SIZE (target_options) > 1
1676 printf (_("\nTarget specific options:\n"));
1678 for (i = ARRAY_SIZE (target_switches); i--;)
1680 const char *option = target_switches[i].name;
1681 const char *description = target_switches[i].description;
1683 if (option == NULL || *option == 0)
1685 else if (description == NULL)
1690 printf (_(" -m%-23s [undocumented]\n"), option);
1692 else if (*description != 0)
1693 doc += printf (" -m%-23s %s\n", option, _(description));
1696 #ifdef TARGET_OPTIONS
1697 for (i = ARRAY_SIZE (target_options); i--;)
1699 const char *option = target_options[i].prefix;
1700 const char *description = target_options[i].description;
1702 if (option == NULL || *option == 0)
1704 else if (description == NULL)
1709 printf (_(" -m%-23s [undocumented]\n"), option);
1711 else if (*description != 0)
1712 doc += printf (" -m%-23s %s\n", option, _(description));
1718 printf (_("\nThere are undocumented target specific options as well.\n"));
1720 printf (_(" They exist, but they are not documented.\n"));
1725 /* Parse a -d... command line switch. */
1728 decode_d_option (const char *arg)
1739 flag_print_asm_name = 1;
1742 flag_dump_rtl_in_asm = 1;
1743 flag_print_asm_name = 1;
1746 graph_dump_format = vcg;
1749 rtl_dump_and_exit = 1;
1754 case 'D': /* These are handled by the preprocessor. */
1758 setup_core_dumping();
1763 if (!enable_rtl_dump_file (c))
1764 warning ("unrecognized gcc debugging option: %c", c);
1769 /* Indexed by enum debug_info_type. */
1770 const char *const debug_type_names[] =
1772 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff", "vms"
1775 /* Decode -m switches. */
1776 /* Decode the switch -mNAME. */
1779 set_target_switch (const char *name)
1782 int valid_target_option = 0;
1784 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
1785 if (!strcmp (target_switches[j].name, name))
1787 if (target_switches[j].value < 0)
1788 target_flags &= ~-target_switches[j].value;
1790 target_flags |= target_switches[j].value;
1793 if (target_switches[j].value < 0)
1794 target_flags_explicit |= -target_switches[j].value;
1796 target_flags_explicit |= target_switches[j].value;
1798 valid_target_option = 1;
1801 #ifdef TARGET_OPTIONS
1802 if (!valid_target_option)
1803 for (j = 0; j < ARRAY_SIZE (target_options); j++)
1805 int len = strlen (target_options[j].prefix);
1806 if (target_options[j].value)
1808 if (!strcmp (target_options[j].prefix, name))
1810 *target_options[j].variable = target_options[j].value;
1811 valid_target_option = 1;
1816 if (!strncmp (target_options[j].prefix, name, len))
1818 *target_options[j].variable = name + len;
1819 valid_target_option = 1;
1825 if (!valid_target_option)
1826 error ("invalid option `%s'", name);
1829 /* Print version information to FILE.
1830 Each line begins with INDENT (for the case where FILE is the
1831 assembler output file). */
1834 print_version (FILE *file, const char *indent)
1837 #define __VERSION__ "[?]"
1841 "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n"
1843 "%s%s%s version %s (%s) compiled by CC.\n"
1845 , indent, *indent != 0 ? " " : "",
1846 lang_hooks.name, version_string, TARGET_NAME,
1847 indent, __VERSION__);
1848 fnotice (file, "%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n",
1849 indent, *indent != 0 ? " " : "",
1850 PARAM_VALUE (GGC_MIN_EXPAND), PARAM_VALUE (GGC_MIN_HEAPSIZE));
1853 /* Print an option value and return the adjusted position in the line.
1854 ??? We don't handle error returns from fprintf (disk full); presumably
1855 other code will catch a disk full though. */
1858 print_single_switch (FILE *file, int pos, int max,
1859 const char *indent, const char *sep, const char *term,
1860 const char *type, const char *name)
1862 /* The ultrix fprintf returns 0 on success, so compute the result we want
1863 here since we need it for the following test. */
1864 int len = strlen (sep) + strlen (type) + strlen (name);
1869 fprintf (file, "%s", term);
1874 fprintf (file, "%s", indent);
1875 pos = strlen (indent);
1877 fprintf (file, "%s%s%s", sep, type, name);
1882 /* Print active target switches to FILE.
1883 POS is the current cursor position and MAX is the size of a "line".
1884 Each line begins with INDENT and ends with TERM.
1885 Each switch is separated from the next by SEP. */
1888 print_switch_values (FILE *file, int pos, int max,
1889 const char *indent, const char *sep, const char *term)
1894 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1895 that it can be printed below. This helps reproducibility. */
1898 /* Print the options as passed. */
1899 pos = print_single_switch (file, pos, max, indent, *indent ? " " : "", term,
1900 _("options passed: "), "");
1902 for (p = &save_argv[1]; *p != NULL; p++)
1906 if (strcmp (*p, "-o") == 0)
1912 if (strcmp (*p, "-quiet") == 0)
1914 if (strcmp (*p, "-version") == 0)
1919 pos = print_single_switch (file, pos, max, indent, sep, term, *p, "");
1922 fprintf (file, "%s", term);
1924 /* Print the -f and -m options that have been enabled.
1925 We don't handle language specific options but printing argv
1928 pos = print_single_switch (file, 0, max, indent, *indent ? " " : "", term,
1929 _("options enabled: "), "");
1931 for (j = 0; j < ARRAY_SIZE (f_options); j++)
1932 if (*f_options[j].variable == f_options[j].on_value)
1933 pos = print_single_switch (file, pos, max, indent, sep, term,
1934 "-f", f_options[j].string);
1936 /* Print target specific options. */
1938 for (j = 0; j < ARRAY_SIZE (target_switches); j++)
1939 if (target_switches[j].name[0] != '\0'
1940 && target_switches[j].value > 0
1941 && ((target_switches[j].value & target_flags)
1942 == target_switches[j].value))
1944 pos = print_single_switch (file, pos, max, indent, sep, term,
1945 "-m", target_switches[j].name);
1948 #ifdef TARGET_OPTIONS
1949 for (j = 0; j < ARRAY_SIZE (target_options); j++)
1950 if (*target_options[j].variable != NULL)
1953 sprintf (prefix, "-m%s", target_options[j].prefix);
1954 pos = print_single_switch (file, pos, max, indent, sep, term,
1955 prefix, *target_options[j].variable);
1959 fprintf (file, "%s", term);
1962 /* Open assembly code output file. Do this even if -fsyntax-only is
1963 on, because then the driver will have provided the name of a
1964 temporary file or bit bucket for us. NAME is the file specified on
1965 the command line, possibly NULL. */
1967 init_asm_output (const char *name)
1969 if (name == NULL && asm_file_name == 0)
1970 asm_out_file = stdout;
1973 if (asm_file_name == 0)
1975 int len = strlen (dump_base_name);
1976 char *dumpname = xmalloc (len + 6);
1977 memcpy (dumpname, dump_base_name, len + 1);
1978 strip_off_ending (dumpname, len);
1979 strcat (dumpname, ".s");
1980 asm_file_name = dumpname;
1982 if (!strcmp (asm_file_name, "-"))
1983 asm_out_file = stdout;
1985 asm_out_file = fopen (asm_file_name, "w+");
1986 if (asm_out_file == 0)
1987 fatal_error ("can't open %s for writing: %m", asm_file_name);
1990 #ifdef IO_BUFFER_SIZE
1991 setvbuf (asm_out_file, xmalloc (IO_BUFFER_SIZE),
1992 _IOFBF, IO_BUFFER_SIZE);
1995 if (!flag_syntax_only)
1997 targetm.asm_out.file_start ();
1999 #ifdef ASM_COMMENT_START
2000 if (flag_verbose_asm)
2002 /* Print the list of options in effect. */
2003 print_version (asm_out_file, ASM_COMMENT_START);
2004 print_switch_values (asm_out_file, 0, MAX_LINE,
2005 ASM_COMMENT_START, " ", "\n");
2006 /* Add a blank line here so it appears in assembler output but not
2008 fprintf (asm_out_file, "\n");
2014 /* Default version of get_pch_validity.
2015 By default, every flag difference is fatal; that will be mostly right for
2016 most targets, but completely right for very few. */
2019 default_get_pch_validity (size_t *len)
2021 #ifdef TARGET_OPTIONS
2026 *len = sizeof (target_flags) + 2;
2027 #ifdef TARGET_OPTIONS
2028 for (i = 0; i < ARRAY_SIZE (target_options); i++)
2031 if (*target_options[i].variable)
2032 *len += strlen (*target_options[i].variable);
2036 result = r = xmalloc (*len);
2040 memcpy (r, &target_flags, sizeof (target_flags));
2041 r += sizeof (target_flags);
2043 #ifdef TARGET_OPTIONS
2044 for (i = 0; i < ARRAY_SIZE (target_options); i++)
2046 const char *str = *target_options[i].variable;
2050 l = strlen (str) + 1;
2059 /* Default version of pch_valid_p. */
2062 default_pch_valid_p (const void *data_p, size_t len)
2064 const char *data = (const char *)data_p;
2065 const char *flag_that_differs = NULL;
2068 /* -fpic and -fpie also usually make a PCH invalid. */
2069 if (data[0] != flag_pic)
2070 return _("created and used with different settings of -fpic");
2071 if (data[1] != flag_pie)
2072 return _("created and used with different settings of -fpie");
2075 /* Check target_flags. */
2076 if (memcmp (data, &target_flags, sizeof (target_flags)) != 0)
2078 for (i = 0; i < ARRAY_SIZE (target_switches); i++)
2083 memcpy (&tf, data, sizeof (target_flags));
2085 bits = target_switches[i].value;
2088 if ((target_flags & bits) != (tf & bits))
2090 flag_that_differs = target_switches[i].name;
2096 data += sizeof (target_flags);
2097 len -= sizeof (target_flags);
2099 /* Check string options. */
2100 #ifdef TARGET_OPTIONS
2101 for (i = 0; i < ARRAY_SIZE (target_options); i++)
2103 const char *str = *target_options[i].variable;
2107 l = strlen (str) + 1;
2108 if (len < l || memcmp (data, str, l) != 0)
2110 flag_that_differs = target_options[i].prefix;
2123 asprintf (&r, _("created and used with differing settings of `-m%s'"),
2126 return _("out of memory");
2131 /* Default tree printer. Handles declarations only. */
2133 default_tree_printer (pretty_printer * pp, text_info *text)
2135 switch (*text->format_spec)
2141 tree t = va_arg (*text->args_ptr, tree);
2142 const char *n = DECL_NAME (t)
2143 ? lang_hooks.decl_printable_name (t, 2)
2154 /* Initialization of the front end environment, before command line
2155 options are parsed. Signal handlers, internationalization etc.
2156 ARGV0 is main's argv[0]. */
2158 general_init (const char *argv0)
2162 p = argv0 + strlen (argv0);
2163 while (p != argv0 && !IS_DIR_SEPARATOR (p[-1]))
2167 xmalloc_set_program_name (progname);
2171 gcc_init_libintl ();
2173 /* Initialize the diagnostics reporting machinery, so option parsing
2174 can give warnings and errors. */
2175 diagnostic_initialize (global_dc);
2176 /* Set a default printer. Language specific initializations will
2177 override it later. */
2178 pp_format_decoder (global_dc->printer) = &default_tree_printer;
2180 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
2182 signal (SIGSEGV, crash_signal);
2185 signal (SIGILL, crash_signal);
2188 signal (SIGBUS, crash_signal);
2191 signal (SIGABRT, crash_signal);
2193 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
2194 signal (SIGIOT, crash_signal);
2197 signal (SIGFPE, crash_signal);
2200 /* Other host-specific signal setup. */
2201 (*host_hooks.extra_signals)();
2203 /* Initialize the garbage-collector, string pools and tree type hash
2207 linemap_init (&line_table);
2210 /* Initialize register usage now so switches may override. */
2213 /* Register the language-independent parameters. */
2214 add_params (lang_independent_params, LAST_PARAM);
2216 /* This must be done after add_params but before argument processing. */
2217 init_ggc_heuristics();
2220 /* Process the options that have been parsed. */
2222 process_options (void)
2224 /* Allow the front end to perform consistency checks and do further
2225 initialization based on the command line options. This hook also
2226 sets the original filename if appropriate (e.g. foo.i -> foo.c)
2227 so we can correctly initialize debug output. */
2228 no_backend = lang_hooks.post_options (&main_input_filename);
2229 input_filename = main_input_filename;
2231 #ifdef OVERRIDE_OPTIONS
2232 /* Some machines may reject certain combinations of options. */
2236 if (flag_short_enums == 2)
2237 flag_short_enums = targetm.default_short_enums ();
2239 /* Set aux_base_name if not already set. */
2242 else if (main_input_filename)
2244 char *name = xstrdup (lbasename (main_input_filename));
2246 strip_off_ending (name, strlen (name));
2247 aux_base_name = name;
2250 aux_base_name = "gccaux";
2252 /* Set up the align_*_log variables, defaulting them to 1 if they
2253 were still unset. */
2254 if (align_loops <= 0) align_loops = 1;
2255 if (align_loops_max_skip > align_loops || !align_loops)
2256 align_loops_max_skip = align_loops - 1;
2257 align_loops_log = floor_log2 (align_loops * 2 - 1);
2258 if (align_jumps <= 0) align_jumps = 1;
2259 if (align_jumps_max_skip > align_jumps || !align_jumps)
2260 align_jumps_max_skip = align_jumps - 1;
2261 align_jumps_log = floor_log2 (align_jumps * 2 - 1);
2262 if (align_labels <= 0) align_labels = 1;
2263 align_labels_log = floor_log2 (align_labels * 2 - 1);
2264 if (align_labels_max_skip > align_labels || !align_labels)
2265 align_labels_max_skip = align_labels - 1;
2266 if (align_functions <= 0) align_functions = 1;
2267 align_functions_log = floor_log2 (align_functions * 2 - 1);
2269 /* Unrolling all loops implies that standard loop unrolling must also
2271 if (flag_unroll_all_loops)
2272 flag_unroll_loops = 1;
2274 if (flag_unroll_loops)
2276 flag_old_unroll_loops = 0;
2277 flag_old_unroll_all_loops = 0;
2280 if (flag_old_unroll_all_loops)
2281 flag_old_unroll_loops = 1;
2283 /* Old loop unrolling requires that strength_reduction be on also. Silently
2284 turn on strength reduction here if it isn't already on. Also, the loop
2285 unrolling code assumes that cse will be run after loop, so that must
2286 be turned on also. */
2287 if (flag_old_unroll_loops)
2289 flag_strength_reduce = 1;
2290 flag_rerun_cse_after_loop = 1;
2292 if (flag_unroll_loops || flag_peel_loops)
2293 flag_rerun_cse_after_loop = 1;
2295 if (flag_non_call_exceptions)
2296 flag_asynchronous_unwind_tables = 1;
2297 if (flag_asynchronous_unwind_tables)
2298 flag_unwind_tables = 1;
2300 /* Disable unit-at-a-time mode for frontends not supporting callgraph
2302 if (flag_unit_at_a_time && ! lang_hooks.callgraph.expand_function)
2303 flag_unit_at_a_time = 0;
2305 if (flag_value_profile_transformations)
2306 flag_profile_values = 1;
2308 /* Warn about options that are not supported on this machine. */
2309 #ifndef INSN_SCHEDULING
2310 if (flag_schedule_insns || flag_schedule_insns_after_reload)
2311 warning ("instruction scheduling not supported on this target machine");
2314 if (flag_delayed_branch)
2315 warning ("this target machine does not have delayed branches");
2318 user_label_prefix = USER_LABEL_PREFIX;
2319 if (flag_leading_underscore != -1)
2321 /* If the default prefix is more complicated than "" or "_",
2322 issue a warning and ignore this option. */
2323 if (user_label_prefix[0] == 0 ||
2324 (user_label_prefix[0] == '_' && user_label_prefix[1] == 0))
2326 user_label_prefix = flag_leading_underscore ? "_" : "";
2329 warning ("-f%sleading-underscore not supported on this target machine",
2330 flag_leading_underscore ? "" : "no-");
2333 /* If we are in verbose mode, write out the version and maybe all the
2334 option flags in use. */
2337 print_version (stderr, "");
2339 print_switch_values (stderr, 0, MAX_LINE, "", " ", "\n");
2342 if (flag_syntax_only)
2344 write_symbols = NO_DEBUG;
2348 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
2350 if (debug_info_level == DINFO_LEVEL_NONE)
2351 write_symbols = NO_DEBUG;
2353 /* Now we know write_symbols, set up the debug hooks based on it.
2354 By default we do nothing for debug output. */
2355 if (PREFERRED_DEBUGGING_TYPE == NO_DEBUG)
2356 default_debug_hooks = &do_nothing_debug_hooks;
2357 #if defined(DBX_DEBUGGING_INFO)
2358 else if (PREFERRED_DEBUGGING_TYPE == DBX_DEBUG)
2359 default_debug_hooks = &dbx_debug_hooks;
2361 #if defined(XCOFF_DEBUGGING_INFO)
2362 else if (PREFERRED_DEBUGGING_TYPE == XCOFF_DEBUG)
2363 default_debug_hooks = &xcoff_debug_hooks;
2365 #ifdef SDB_DEBUGGING_INFO
2366 else if (PREFERRED_DEBUGGING_TYPE == SDB_DEBUG)
2367 default_debug_hooks = &sdb_debug_hooks;
2369 #ifdef DWARF2_DEBUGGING_INFO
2370 else if (PREFERRED_DEBUGGING_TYPE == DWARF2_DEBUG)
2371 default_debug_hooks = &dwarf2_debug_hooks;
2373 #ifdef VMS_DEBUGGING_INFO
2374 else if (PREFERRED_DEBUGGING_TYPE == VMS_DEBUG
2375 || PREFERRED_DEBUGGING_TYPE == VMS_AND_DWARF2_DEBUG)
2376 default_debug_hooks = &vmsdbg_debug_hooks;
2379 if (write_symbols == NO_DEBUG)
2380 debug_hooks = &do_nothing_debug_hooks;
2381 #if defined(DBX_DEBUGGING_INFO)
2382 else if (write_symbols == DBX_DEBUG)
2383 debug_hooks = &dbx_debug_hooks;
2385 #if defined(XCOFF_DEBUGGING_INFO)
2386 else if (write_symbols == XCOFF_DEBUG)
2387 debug_hooks = &xcoff_debug_hooks;
2389 #ifdef SDB_DEBUGGING_INFO
2390 else if (write_symbols == SDB_DEBUG)
2391 debug_hooks = &sdb_debug_hooks;
2393 #ifdef DWARF2_DEBUGGING_INFO
2394 else if (write_symbols == DWARF2_DEBUG)
2395 debug_hooks = &dwarf2_debug_hooks;
2397 #ifdef VMS_DEBUGGING_INFO
2398 else if (write_symbols == VMS_DEBUG || write_symbols == VMS_AND_DWARF2_DEBUG)
2399 debug_hooks = &vmsdbg_debug_hooks;
2402 error ("target system does not support the \"%s\" debug format",
2403 debug_type_names[write_symbols]);
2405 /* Now we know which debug output will be used so we can set
2406 flag_var_tracking, flag_rename_registers and flag_web if the user has
2407 not specified them. */
2408 if (debug_info_level < DINFO_LEVEL_NORMAL
2409 || debug_hooks->var_location == do_nothing_debug_hooks.var_location)
2411 if (flag_var_tracking == 1)
2413 if (debug_info_level < DINFO_LEVEL_NORMAL)
2414 warning ("variable tracking requested, but useless unless "
2415 "producing debug info");
2417 warning ("variable tracking requested, but not supported "
2418 "by this debug format");
2420 flag_var_tracking = 0;
2423 if (flag_rename_registers == AUTODETECT_FLAG_VAR_TRACKING)
2424 flag_rename_registers = default_debug_hooks->var_location
2425 != do_nothing_debug_hooks.var_location;
2427 if (flag_web == AUTODETECT_FLAG_VAR_TRACKING)
2428 flag_web = optimize >= 2 && (default_debug_hooks->var_location
2429 != do_nothing_debug_hooks.var_location);
2431 if (flag_var_tracking == AUTODETECT_FLAG_VAR_TRACKING)
2432 flag_var_tracking = optimize >= 1;
2434 /* If auxiliary info generation is desired, open the output file.
2435 This goes in the same directory as the source file--unlike
2436 all the other output files. */
2437 if (flag_gen_aux_info)
2439 aux_info_file = fopen (aux_info_file_name, "w");
2440 if (aux_info_file == 0)
2441 fatal_error ("can't open %s: %m", aux_info_file_name);
2444 if (! targetm.have_named_sections)
2446 if (flag_function_sections)
2448 warning ("-ffunction-sections not supported for this target");
2449 flag_function_sections = 0;
2451 if (flag_data_sections)
2453 warning ("-fdata-sections not supported for this target");
2454 flag_data_sections = 0;
2458 if (flag_function_sections && profile_flag)
2460 warning ("-ffunction-sections disabled; it makes profiling impossible");
2461 flag_function_sections = 0;
2464 #ifndef HAVE_prefetch
2465 if (flag_prefetch_loop_arrays)
2467 warning ("-fprefetch-loop-arrays not supported for this target");
2468 flag_prefetch_loop_arrays = 0;
2471 if (flag_prefetch_loop_arrays && !HAVE_prefetch)
2473 warning ("-fprefetch-loop-arrays not supported for this target (try -march switches)");
2474 flag_prefetch_loop_arrays = 0;
2478 /* This combination of options isn't handled for i386 targets and doesn't
2479 make much sense anyway, so don't allow it. */
2480 if (flag_prefetch_loop_arrays && optimize_size)
2482 warning ("-fprefetch-loop-arrays is not supported with -Os");
2483 flag_prefetch_loop_arrays = 0;
2486 #ifndef OBJECT_FORMAT_ELF
2487 if (flag_function_sections && write_symbols != NO_DEBUG)
2488 warning ("-ffunction-sections may affect debugging on some targets");
2491 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2492 if (flag_signaling_nans)
2493 flag_trapping_math = 1;
2496 /* Initialize the compiler back end. */
2500 init_adjust_machine_modes ();
2502 init_emit_once (debug_info_level == DINFO_LEVEL_NORMAL
2503 || debug_info_level == DINFO_LEVEL_VERBOSE
2504 #ifdef VMS_DEBUGGING_INFO
2505 /* Enable line number info for traceback. */
2506 || debug_info_level > DINFO_LEVEL_NONE
2508 || flag_test_coverage
2509 || warn_notreached);
2512 init_fake_stack_mems ();
2516 init_function_once ();
2517 init_varasm_once ();
2519 /* The following initialization functions need to generate rtl, so
2520 provide a dummy function context for them. */
2521 init_dummy_function_start ();
2523 if (flag_caller_saves)
2524 init_caller_save ();
2525 expand_dummy_function_end ();
2528 /* Language-dependent initialization. Returns nonzero on success. */
2530 lang_dependent_init (const char *name)
2532 if (dump_base_name == 0)
2533 dump_base_name = name ? name : "gccdump";
2535 /* Other front-end initialization. */
2536 if (lang_hooks.init () == 0)
2539 init_asm_output (name);
2541 /* These create various _DECL nodes, so need to be called after the
2542 front end is initialized. */
2545 init_optimization_passes ();
2547 /* The following initialization functions need to generate rtl, so
2548 provide a dummy function context for them. */
2549 init_dummy_function_start ();
2551 expand_dummy_function_end ();
2553 /* If dbx symbol table desired, initialize writing it and output the
2554 predefined types. */
2555 timevar_push (TV_SYMOUT);
2557 #ifdef DWARF2_UNWIND_INFO
2558 if (dwarf2out_do_frame ())
2559 dwarf2out_frame_init ();
2562 /* Now we have the correct original filename, we can initialize
2564 (*debug_hooks->init) (name);
2566 timevar_pop (TV_SYMOUT);
2571 /* Clean up: close opened files, etc. */
2576 /* Close the dump files. */
2577 if (flag_gen_aux_info)
2579 fclose (aux_info_file);
2581 unlink (aux_info_file_name);
2584 /* Close non-debugging input and output files. Take special care to note
2585 whether fclose returns an error, since the pages might still be on the
2586 buffer chain while the file is open. */
2590 if (ferror (asm_out_file) != 0)
2591 fatal_error ("error writing to %s: %m", asm_file_name);
2592 if (fclose (asm_out_file) != 0)
2593 fatal_error ("error closing %s: %m", asm_file_name);
2596 finish_optimization_passes ();
2600 ggc_print_statistics ();
2601 stringpool_statistics ();
2602 dump_tree_statistics ();
2603 dump_rtx_statistics ();
2604 dump_varray_statistics ();
2605 dump_alloc_pool_statistics ();
2606 dump_ggc_loc_statistics ();
2609 /* Free up memory for the benefit of leak detectors. */
2612 /* Language-specific end of compilation actions. */
2613 lang_hooks.finish ();
2616 /* Initialize the compiler, and compile the input file. */
2620 /* Initialize timing first. The C front ends read the main file in
2621 the post_options hook, and C++ does file timings. */
2622 if (time_report || !quiet_flag || flag_detailed_statistics)
2624 timevar_start (TV_TOTAL);
2628 /* Don't do any more if an error has already occurred. */
2631 /* Set up the back-end if requested. */
2635 /* Language-dependent initialization. Returns true on success. */
2636 if (lang_dependent_init (main_input_filename))
2642 /* Stop timing and print the times. */
2643 timevar_stop (TV_TOTAL);
2644 timevar_print (stderr);
2647 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2648 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2649 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2651 It is not safe to call this function more than once. */
2654 toplev_main (unsigned int argc, const char **argv)
2658 /* Initialization of GCC's environment, and diagnostics. */
2659 general_init (argv[0]);
2661 /* Parse the options and do minimal processing; basically just
2662 enough to default flags appropriately. */
2663 decode_options (argc, argv);
2667 /* Exit early if we can (e.g. -help). */
2668 if (!exit_after_options)
2671 if (errorcount || sorrycount)
2672 return (FATAL_EXIT_CODE);
2674 return (SUCCESS_EXIT_CODE);