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 /* Current position in real source file. */
143 location_t input_location
;
145 struct line_maps line_table
;
147 /* Nonzero if it is unsafe to create any new pseudo registers. */
150 /* Stack of currently pending input files. */
152 struct file_stack
*input_file_stack
;
154 /* Incremented on each change to input_file_stack. */
155 int input_file_stack_tick
;
157 /* Name to use as base of names for dump output files. */
159 const char *dump_base_name
;
161 /* Name to use as a base for auxiliary output files. */
163 const char *aux_base_name
;
165 /* Bit flags that specify the machine subtype we are compiling for.
166 Bits are tested using macros TARGET_... defined in the tm.h file
167 and set by `-m...' switches. Must be defined in rtlanal.c. */
169 extern int target_flags
;
171 /* A mask of target_flags that includes bit X if X was set or cleared
172 on the command line. */
174 int target_flags_explicit
;
176 /* Debug hooks - dependent upon command line options. */
178 const struct gcc_debug_hooks
*debug_hooks
;
180 /* Other flags saying which kinds of debugging dump have been requested. */
182 int rtl_dump_and_exit
;
183 int flag_print_asm_name
;
184 enum graph_dump_types graph_dump_format
;
186 /* Name for output file of assembly code, specified with -o. */
188 const char *asm_file_name
;
190 /* Nonzero means do optimizations. -O.
191 Particular numeric values stand for particular amounts of optimization;
192 thus, -O2 stores 2 here. However, the optimizations beyond the basic
193 ones are not controlled directly by this variable. Instead, they are
194 controlled by individual `flag_...' variables that are defaulted
195 based on this variable. */
199 /* Nonzero means optimize for size. -Os.
200 The only valid values are zero and nonzero. When optimize_size is
201 nonzero, optimize defaults to 2, but certain individual code
202 bloating optimizations are disabled. */
204 int optimize_size
= 0;
206 /* The FUNCTION_DECL for the function currently being compiled,
207 or 0 if between functions. */
208 tree current_function_decl
;
210 /* Set to the FUNC_BEGIN label of the current function, or NULL_TREE
212 tree current_function_func_begin_label
;
214 /* Nonzero if doing dwarf2 duplicate elimination. */
216 int flag_eliminate_dwarf2_dups
= 0;
218 /* Nonzero if doing unused type elimination. */
220 int flag_eliminate_unused_debug_types
= 1;
222 /* Nonzero means emit debugging information only for symbols which are used. */
223 int flag_debug_only_used_symbols
= 0;
225 /* Nonzero if generating code to do profiling. */
227 int profile_flag
= 0;
229 /* Nonzero if generating code to profile program flow graph arcs. */
231 int profile_arc_flag
= 0;
233 /* Nonzero if value histograms should be measured. */
235 int flag_profile_values
= 0;
237 /* Nonzero if value histograms should be used to optimize code. */
238 int flag_value_profile_transformations
= 0;
240 /* Nonzero if generating info for gcov to calculate line test coverage. */
242 int flag_test_coverage
= 0;
244 /* Nonzero indicates that branch taken probabilities should be calculated. */
246 int flag_branch_probabilities
= 0;
248 /* Nonzero if basic blocks should be reordered. */
250 int flag_reorder_blocks
= 0;
252 /* Nonzero if blocks should be partitioned into hot and cold sections in
253 addition to being reordered. */
255 int flag_reorder_blocks_and_partition
= 0;
257 /* Nonzero if functions should be reordered. */
259 int flag_reorder_functions
= 0;
261 /* Nonzero if registers should be renamed. */
263 int flag_rename_registers
= 0;
264 int flag_cprop_registers
= 0;
266 /* Nonzero for -pedantic switch: warn about anything
267 that standard spec forbids. */
271 /* Temporarily suppress certain warnings.
272 This is set while reading code from a system header file. */
274 int in_system_header
= 0;
276 /* Don't print functions as they are compiled. -quiet. */
280 /* Print times taken by the various passes. -ftime-report. */
284 /* Print memory still in use at end of compilation (which may have little
285 to do with peak memory consumption). -fmem-report. */
289 /* Nonzero means to collect statistics which might be expensive
290 and to print them when we are done. */
291 int flag_detailed_statistics
= 0;
293 /* A random sequence of characters, unless overridden by user. */
294 const char *flag_random_seed
;
296 /* A local time stamp derived from the time of compilation. It will be
297 zero if the system cannot provide a time. It will be -1u, if the
298 user has specified a particular random seed. */
303 /* Nonzero means `char' should be signed. */
305 int flag_signed_char
;
307 /* Nonzero means give an enum type only as many bytes as it needs. */
309 int flag_short_enums
;
311 /* Nonzero for -fcaller-saves: allocate values in regs that need to
312 be saved across function calls, if that produces overall better code.
313 Optional now, so people can test it. */
315 int flag_caller_saves
= 0;
317 /* Nonzero if structures and unions should be returned in memory.
319 This should only be defined if compatibility with another compiler or
320 with an ABI is needed, because it results in slower code. */
322 #ifndef DEFAULT_PCC_STRUCT_RETURN
323 #define DEFAULT_PCC_STRUCT_RETURN 1
326 /* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
328 int flag_pcc_struct_return
= DEFAULT_PCC_STRUCT_RETURN
;
330 /* Nonzero for -fforce-mem: load memory value into a register
331 before arithmetic on it. This makes better cse but slower compilation. */
333 int flag_force_mem
= 0;
335 /* Nonzero for -fforce-addr: load memory address into a register before
336 reference to memory. This makes better cse but slower compilation. */
338 int flag_force_addr
= 0;
340 /* Nonzero for -fdefer-pop: don't pop args after each function call;
341 instead save them up to pop many calls' args with one insns. */
343 int flag_defer_pop
= 0;
345 /* Nonzero for -ffloat-store: don't allocate floats and doubles
346 in extended-precision registers. */
348 int flag_float_store
= 0;
350 /* Nonzero for -fcse-follow-jumps:
351 have cse follow jumps to do a more extensive job. */
353 int flag_cse_follow_jumps
;
355 /* Nonzero for -fcse-skip-blocks:
356 have cse follow a branch around a block. */
357 int flag_cse_skip_blocks
;
359 /* Nonzero for -fexpensive-optimizations:
360 perform miscellaneous relatively-expensive optimizations. */
361 int flag_expensive_optimizations
;
363 /* Nonzero for -fthread-jumps:
364 have jump optimize output of loop. */
366 int flag_thread_jumps
;
368 /* Nonzero enables strength-reduction in loop.c. */
370 int flag_strength_reduce
= 0;
372 /* Nonzero enables loop unrolling in unroll.c. Only loops for which the
373 number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
374 UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
377 int flag_old_unroll_loops
;
379 /* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
380 This is generally not a win. */
382 int flag_old_unroll_all_loops
;
384 /* Enables unrolling of simple loops in loop-unroll.c. */
385 int flag_unroll_loops
;
387 /* Enables unrolling of all loops in loop-unroll.c. */
388 int flag_unroll_all_loops
;
390 /* Nonzero enables loop peeling. */
393 /* Nonzero enables loop unswitching. */
394 int flag_unswitch_loops
;
396 /* Nonzero enables prefetch optimizations for arrays in loops. */
398 int flag_prefetch_loop_arrays
;
400 /* Nonzero forces all invariant computations in loops to be moved
403 int flag_move_all_movables
= 0;
405 /* Nonzero forces all general induction variables in loops to be
408 int flag_reduce_all_givs
= 0;
410 /* Nonzero to perform full register move optimization passes. This is the
413 int flag_regmove
= 0;
415 /* Nonzero means don't put addresses of constant functions in registers.
416 Used for compiling the Unix kernel, where strange substitutions are
417 done on the assembly output. */
419 int flag_no_function_cse
= 0;
421 /* Nonzero for -fomit-frame-pointer:
422 don't make a frame pointer in simple functions that don't require one. */
424 int flag_omit_frame_pointer
= 0;
426 /* Nonzero means place each function into its own section on those platforms
427 which support arbitrary section names and unlimited numbers of sections. */
429 int flag_function_sections
= 0;
431 /* ... and similar for data. */
433 int flag_data_sections
= 0;
435 /* Nonzero to inhibit use of define_optimization peephole opts. */
437 int flag_no_peephole
= 0;
439 /* Nonzero allows GCC to optimize sibling and tail recursive calls. */
441 int flag_optimize_sibling_calls
= 0;
443 /* Nonzero means the front end generally wants `errno' maintained by math
444 operations, like built-in SQRT. */
446 int flag_errno_math
= 1;
448 /* Nonzero means that unsafe floating-point math optimizations are allowed
449 for the sake of speed. IEEE compliance is not guaranteed, and operations
450 are allowed to assume that their arguments and results are "normal"
451 (e.g., nonnegative for SQRT). */
453 int flag_unsafe_math_optimizations
= 0;
455 /* Nonzero means that no NaNs or +-Infs are expected. */
457 int flag_finite_math_only
= 0;
459 /* Zero means that floating-point math operations cannot generate a
460 (user-visible) trap. This is the case, for example, in nonstop
461 IEEE 754 arithmetic. Trapping conditions include division by zero,
462 overflow, underflow, invalid and inexact, but does not include
463 operations on signaling NaNs (see below). */
465 int flag_trapping_math
= 1;
467 /* Nonzero means disable transformations that assume default floating
468 point rounding behavior. */
470 int flag_rounding_math
= 0;
472 /* Nonzero means disable transformations observable by signaling NaNs.
473 This option implies that any operation on an IEEE signaling NaN can
474 generate a (user-visible) trap. */
476 int flag_signaling_nans
= 0;
478 /* 0 means straightforward implementation of complex divide acceptable.
479 1 means wide ranges of inputs must work for complex divide.
480 2 means C99-like requirements for complex divide (not yet implemented). */
482 int flag_complex_divide_method
= 0;
484 /* Nonzero means just do syntax checking; don't output anything. */
486 int flag_syntax_only
= 0;
488 /* Nonzero means performs web construction pass. */
492 /* Nonzero means perform loop optimizer. */
494 int flag_loop_optimize
;
496 /* Nonzero means perform crossjumping. */
498 int flag_crossjumping
;
500 /* Nonzero means perform if conversion. */
502 int flag_if_conversion
;
504 /* Nonzero means perform if conversion after reload. */
506 int flag_if_conversion2
;
508 /* Nonzero means to use global dataflow analysis to eliminate
509 useless null pointer tests. */
511 int flag_delete_null_pointer_checks
;
513 /* Nonzero means perform global CSE. */
517 /* Nonzero means to do the enhanced load motion during gcse, which trys
518 to hoist loads by not killing them when a store to the same location
521 int flag_gcse_lm
= 1;
523 /* Nonzero means to perform store motion after gcse, which will try to
524 move stores closer to the exit block. Its not very effective without
527 int flag_gcse_sm
= 1;
529 /* Nonzero if we want to perform redundant load after store elimination
532 int flag_gcse_las
= 1;
534 /* Nonzero means perform global cse after register allocation. */
535 int flag_gcse_after_reload
= 0;
537 /* Perform target register optimization before prologue / epilogue
540 int flag_branch_target_load_optimize
= 0;
542 /* Perform target register optimization after prologue / epilogue
543 threading and jump2. */
545 int flag_branch_target_load_optimize2
= 0;
547 /* For the bt-load pass, nonzero means don't re-use branch target registers
548 in any basic block. */
550 int flag_btr_bb_exclusive
;
552 /* Nonzero means to rerun cse after loop optimization. This increases
553 compilation time about 20% and picks up a few more common expressions. */
555 int flag_rerun_cse_after_loop
;
557 /* Nonzero means to run loop optimizations twice. */
559 int flag_rerun_loop_opt
;
561 /* Nonzero for -finline-functions: ok to inline functions that look like
562 good inline candidates. */
564 int flag_inline_functions
;
566 /* Nonzero for -fkeep-inline-functions: even if we make a function
567 go inline everywhere, keep its definition around for debugging
570 int flag_keep_inline_functions
;
572 /* Nonzero means that functions will not be inlined. */
574 int flag_no_inline
= 2;
576 /* Nonzero means that we don't want inlining by virtue of -fno-inline,
577 not just because the tree inliner turned us off. */
579 int flag_really_no_inline
= 2;
581 /* Nonzero means that we should emit static const variables
582 regardless of whether or not optimization is turned on. */
584 int flag_keep_static_consts
= 1;
586 /* Nonzero means we should be saving declaration info into a .X file. */
588 int flag_gen_aux_info
= 0;
590 /* Specified name of aux-info file. */
592 const char *aux_info_file_name
;
594 /* Nonzero means make the text shared if supported. */
596 int flag_shared_data
;
598 /* Nonzero means schedule into delayed branch slots if supported. */
600 int flag_delayed_branch
;
602 /* Nonzero if we are compiling pure (sharable) code.
603 Value is 1 if we are doing "small" pic; value is 2 if we're doing
608 /* Nonzero if we are compiling position independent code for executable.
609 The value is 1 if we are doing "small" pic; value is 2 if we're doing
614 /* Nonzero if we are compiling code for a shared library, zero for
619 /* Set to the default thread-local storage (tls) model to use. */
621 enum tls_model flag_tls_default
= TLS_MODEL_GLOBAL_DYNAMIC
;
623 /* Nonzero means generate extra code for exception handling and enable
624 exception handling. */
628 /* Nonzero means generate frame unwind info table when supported. */
630 int flag_unwind_tables
= 0;
632 /* Nonzero means generate frame unwind info table exact at each insn
635 int flag_asynchronous_unwind_tables
= 0;
637 /* Nonzero means don't place uninitialized global data in common storage
642 /* Nonzero means change certain warnings into errors.
643 Usually these are warnings about failure to conform to some standard. */
645 int flag_pedantic_errors
= 0;
647 /* flag_schedule_insns means schedule insns within basic blocks (before
649 flag_schedule_insns_after_reload means schedule insns after
652 int flag_schedule_insns
= 0;
653 int flag_schedule_insns_after_reload
= 0;
655 /* When flag_schedule_insns_after_reload is set, use EBB scheduler. */
656 int flag_sched2_use_superblocks
= 0;
658 /* When flag_schedule_insns_after_reload is set, construct traces and EBB
660 int flag_sched2_use_traces
= 0;
662 /* The following flags have effect only for scheduling before register
665 flag_schedule_interblock means schedule insns across basic blocks.
666 flag_schedule_speculative means allow speculative motion of non-load insns.
667 flag_schedule_speculative_load means allow speculative motion of some
669 flag_schedule_speculative_load_dangerous allows speculative motion of more
672 int flag_schedule_interblock
= 1;
673 int flag_schedule_speculative
= 1;
674 int flag_schedule_speculative_load
= 0;
675 int flag_schedule_speculative_load_dangerous
= 0;
677 /* The following flags have an effect during scheduling after register
680 flag_sched_stalled_insns means that insns can be moved prematurely from the queue
681 of stalled insns into the ready list.
683 flag_sched_stalled_insns_dep controls how many insn groups will be examined
684 for a dependency on a stalled insn that is candidate for premature removal
685 from the queue of stalled insns into the ready list (has an effect only if
686 the flag 'sched_stalled_insns' is set). */
688 int flag_sched_stalled_insns
= 0;
689 int flag_sched_stalled_insns_dep
= 1;
691 int flag_single_precision_constant
;
693 /* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
694 by a cheaper branch on a count register. */
695 int flag_branch_on_count_reg
= 1;
697 /* -finhibit-size-directive inhibits output of .size for ELF.
698 This is used only for compiling crtstuff.c,
699 and it may be extended to other effects
700 needed for crtstuff.c on other systems. */
701 int flag_inhibit_size_directive
= 0;
703 /* -fverbose-asm causes extra commentary information to be produced in
704 the generated assembly code (to make it more readable). This option
705 is generally only of use to those who actually need to read the
706 generated assembly code (perhaps while debugging the compiler itself).
707 -fno-verbose-asm, the default, causes the extra information
708 to be omitted and is useful when comparing two assembler files. */
710 int flag_verbose_asm
= 0;
712 /* -dA causes debug commentary information to be produced in
713 the generated assembly code (to make it more readable). This option
714 is generally only of use to those who actually need to read the
715 generated assembly code (perhaps while debugging the compiler itself).
716 Currently, this switch is only used by dwarfout.c; however, it is intended
717 to be a catchall for printing debug information in the assembler file. */
719 int flag_debug_asm
= 0;
721 /* -dP causes the rtl to be emitted as a comment in assembly. */
723 int flag_dump_rtl_in_asm
= 0;
725 /* Nonzero means put zero initialized data in the bss section. */
726 int flag_zero_initialized_in_bss
= 1;
728 /* Tag all structures with __attribute__(packed). */
729 int flag_pack_struct
= 0;
731 /* Emit code to check for stack overflow; also may cause large objects
732 to be allocated dynamically. */
733 int flag_stack_check
;
735 /* When non-NULL, indicates that whenever space is allocated on the
736 stack, the resulting stack pointer must not pass this
737 address---that is, for stacks that grow downward, the stack pointer
738 must always be greater than or equal to this address; for stacks
739 that grow upward, the stack pointer must be less than this address.
740 At present, the rtx may be either a REG or a SYMBOL_REF, although
741 the support provided depends on the backend. */
744 /* 0 if pointer arguments may alias each other. True in C.
745 1 if pointer arguments may not alias each other but may alias
747 2 if pointer arguments may not alias each other and may not
748 alias global variables. True in Fortran.
749 This defaults to 0 for C. */
750 int flag_argument_noalias
= 0;
752 /* Nonzero if we should do (language-dependent) alias analysis.
753 Typically, this analysis will assume that expressions of certain
754 types do not alias expressions of certain other types. Only used
755 if alias analysis (in general) is enabled. */
756 int flag_strict_aliasing
= 0;
758 /* Instrument functions with calls at entry and exit, for profiling. */
759 int flag_instrument_function_entry_exit
= 0;
761 /* Nonzero means ignore `#ident' directives. 0 means handle them.
762 On SVR4 targets, it also controls whether or not to emit a
763 string identifying the compiler. */
765 int flag_no_ident
= 0;
767 /* This will perform a peephole pass before sched2. */
768 int flag_peephole2
= 0;
770 /* This will try to guess branch probabilities. */
771 int flag_guess_branch_prob
= 0;
773 /* -fcheck-bounds causes gcc to generate array bounds checks.
774 For C, C++, ObjC: defaults to off.
775 For Java: defaults to on.
776 For Fortran: defaults to off. */
777 int flag_bounds_check
= 0;
779 /* This will attempt to merge constant section constants, if 1 only
780 string constants and constants from constant pool, if 2 also constant
782 int flag_merge_constants
= 1;
784 /* If one, renumber instruction UIDs to reduce the number of
785 unused UIDs if there are a lot of instructions. If greater than
786 one, unconditionally renumber instruction UIDs. */
787 int flag_renumber_insns
= 1;
789 /* If nonzero, use the graph coloring register allocator. */
790 int flag_new_regalloc
= 0;
792 /* Nonzero if we perform superblock formation. */
796 /* Nonzero if we perform whole unit at a time compilation. */
798 int flag_unit_at_a_time
= 0;
800 /* Nonzero if we should track variables. When
801 flag_var_tracking == AUTODETECT_FLAG_VAR_TRACKING it will be set according
802 to optimize, debug_info_level and debug_hooks in process_options (). */
804 #define AUTODETECT_FLAG_VAR_TRACKING 2
805 int flag_var_tracking
= AUTODETECT_FLAG_VAR_TRACKING
;
807 /* Values of the -falign-* flags: how much to align labels in code.
808 0 means `use default', 1 means `don't align'.
809 For each variable, there is an _log variant which is the power
810 of two not less than the variable, for .align output. */
814 int align_loops_max_skip
;
817 int align_jumps_max_skip
;
819 int align_labels_log
;
820 int align_labels_max_skip
;
822 int align_functions_log
;
824 /* Like align_functions_log above, but used by front-ends to force the
825 minimum function alignment. Zero means no alignment is forced. */
826 int force_align_functions_log
;
830 const char *const string
;
834 lang_independent_options
;
836 /* Nonzero if signed arithmetic overflow should trap. */
839 /* Nonzero if signed arithmetic overflow should wrap around. */
842 /* Nonzero if subexpressions must be evaluated from left-to-right. */
843 int flag_evaluation_order
= 0;
845 /* Add or remove a leading underscore from user symbols. */
846 int flag_leading_underscore
= -1;
848 /* The version of the C++ ABI in use. The following values are
851 0: The version of the ABI believed most conformant with the
852 C++ ABI specification. This ABI may change as bugs are
853 discovered and fixed. Therefore, 0 will not necessarily
854 indicate the same ABI in different versions of G++.
856 1: The version of the ABI first used in G++ 3.2.
858 2: The version of the ABI first used in G++ 3.4.
860 Additional positive integers will be assigned as new versions of
861 the ABI become the default version of the ABI. */
863 int flag_abi_version
= 2;
865 /* The user symbol prefix after having resolved same. */
866 const char *user_label_prefix
;
868 static const param_info lang_independent_params
[] = {
869 #define DEFPARAM(ENUM, OPTION, HELP, DEFAULT) \
870 { OPTION, DEFAULT, HELP },
871 #include "params.def"
876 /* Table of language-independent -f options.
877 STRING is the option name. VARIABLE is the address of the variable.
878 ON_VALUE is the value to store in VARIABLE
879 if `-fSTRING' is seen as an option.
880 (If `-fno-STRING' is seen as an option, the opposite value is stored.) */
882 static const lang_independent_options f_options
[] =
884 {"eliminate-dwarf2-dups", &flag_eliminate_dwarf2_dups
, 1 },
885 {"eliminate-unused-debug-symbols", &flag_debug_only_used_symbols
, 1 },
886 {"eliminate-unused-debug-types", &flag_eliminate_unused_debug_types
, 1 },
887 {"float-store", &flag_float_store
, 1 },
888 {"defer-pop", &flag_defer_pop
, 1 },
889 {"omit-frame-pointer", &flag_omit_frame_pointer
, 1 },
890 {"optimize-sibling-calls", &flag_optimize_sibling_calls
, 1 },
891 {"tracer", &flag_tracer
, 1 },
892 {"unit-at-a-time", &flag_unit_at_a_time
, 1 },
893 {"cse-follow-jumps", &flag_cse_follow_jumps
, 1 },
894 {"cse-skip-blocks", &flag_cse_skip_blocks
, 1 },
895 {"expensive-optimizations", &flag_expensive_optimizations
, 1 },
896 {"thread-jumps", &flag_thread_jumps
, 1 },
897 {"strength-reduce", &flag_strength_reduce
, 1 },
898 {"unroll-loops", &flag_unroll_loops
, 1 },
899 {"unroll-all-loops", &flag_unroll_all_loops
, 1 },
900 {"old-unroll-loops", &flag_old_unroll_loops
, 1 },
901 {"old-unroll-all-loops", &flag_old_unroll_all_loops
, 1 },
902 {"peel-loops", &flag_peel_loops
, 1 },
903 {"unswitch-loops", &flag_unswitch_loops
, 1 },
904 {"prefetch-loop-arrays", &flag_prefetch_loop_arrays
, 1 },
905 {"move-all-movables", &flag_move_all_movables
, 1 },
906 {"reduce-all-givs", &flag_reduce_all_givs
, 1 },
907 {"peephole", &flag_no_peephole
, 0 },
908 {"force-mem", &flag_force_mem
, 1 },
909 {"force-addr", &flag_force_addr
, 1 },
910 {"function-cse", &flag_no_function_cse
, 0 },
911 {"inline-functions", &flag_inline_functions
, 1 },
912 {"keep-inline-functions", &flag_keep_inline_functions
, 1 },
913 {"inline", &flag_no_inline
, 0 },
914 {"keep-static-consts", &flag_keep_static_consts
, 1 },
915 {"syntax-only", &flag_syntax_only
, 1 },
916 {"shared-data", &flag_shared_data
, 1 },
917 {"caller-saves", &flag_caller_saves
, 1 },
918 {"pcc-struct-return", &flag_pcc_struct_return
, 1 },
919 {"reg-struct-return", &flag_pcc_struct_return
, 0 },
920 {"delayed-branch", &flag_delayed_branch
, 1 },
921 {"web", &flag_web
, 1},
922 {"gcse", &flag_gcse
, 1 },
923 {"gcse-lm", &flag_gcse_lm
, 1 },
924 {"gcse-sm", &flag_gcse_sm
, 1 },
925 {"gcse-las", &flag_gcse_las
, 1 },
926 {"gcse-after-reload", &flag_gcse_after_reload
, 1},
927 {"branch-target-load-optimize", &flag_branch_target_load_optimize
, 1 },
928 {"branch-target-load-optimize2", &flag_branch_target_load_optimize2
, 1 },
929 {"btr-bb-exclusive", &flag_btr_bb_exclusive
, 1 },
930 {"loop-optimize", &flag_loop_optimize
, 1 },
931 {"crossjumping", &flag_crossjumping
, 1 },
932 {"if-conversion", &flag_if_conversion
, 1 },
933 {"if-conversion2", &flag_if_conversion2
, 1 },
934 {"rerun-cse-after-loop", &flag_rerun_cse_after_loop
, 1 },
935 {"rerun-loop-opt", &flag_rerun_loop_opt
, 1 },
936 {"delete-null-pointer-checks", &flag_delete_null_pointer_checks
, 1 },
937 {"schedule-insns", &flag_schedule_insns
, 1 },
938 {"schedule-insns2", &flag_schedule_insns_after_reload
, 1 },
939 {"sched-interblock",&flag_schedule_interblock
, 1 },
940 {"sched-spec",&flag_schedule_speculative
, 1 },
941 {"sched-spec-load",&flag_schedule_speculative_load
, 1 },
942 {"sched-spec-load-dangerous",&flag_schedule_speculative_load_dangerous
, 1 },
943 {"sched-stalled-insns", &flag_sched_stalled_insns
, 0 },
944 {"sched-stalled-insns-dep", &flag_sched_stalled_insns_dep
, 1 },
945 {"sched2-use-superblocks", &flag_sched2_use_superblocks
, 1 },
946 {"sched2-use-traces", &flag_sched2_use_traces
, 1 },
947 {"branch-count-reg",&flag_branch_on_count_reg
, 1 },
948 {"pic", &flag_pic
, 1 },
949 {"PIC", &flag_pic
, 2 },
950 {"pie", &flag_pie
, 1 },
951 {"PIE", &flag_pie
, 2 },
952 {"exceptions", &flag_exceptions
, 1 },
953 {"unwind-tables", &flag_unwind_tables
, 1 },
954 {"asynchronous-unwind-tables", &flag_asynchronous_unwind_tables
, 1 },
955 {"non-call-exceptions", &flag_non_call_exceptions
, 1 },
956 {"profile-arcs", &profile_arc_flag
, 1 },
957 {"profile-values", &flag_profile_values
, 1 },
958 {"vpt", &flag_value_profile_transformations
, 1 },
959 {"test-coverage", &flag_test_coverage
, 1 },
960 {"branch-probabilities", &flag_branch_probabilities
, 1 },
961 {"profile", &profile_flag
, 1 },
962 {"reorder-blocks", &flag_reorder_blocks
, 1 },
963 {"reorder-blocks-and-partition", &flag_reorder_blocks_and_partition
, 1},
964 {"reorder-functions", &flag_reorder_functions
, 1 },
965 {"rename-registers", &flag_rename_registers
, 1 },
966 {"cprop-registers", &flag_cprop_registers
, 1 },
967 {"common", &flag_no_common
, 0 },
968 {"inhibit-size-directive", &flag_inhibit_size_directive
, 1 },
969 {"function-sections", &flag_function_sections
, 1 },
970 {"data-sections", &flag_data_sections
, 1 },
971 {"verbose-asm", &flag_verbose_asm
, 1 },
972 {"regmove", &flag_regmove
, 1 },
973 {"optimize-register-move", &flag_regmove
, 1 },
974 {"pack-struct", &flag_pack_struct
, 1 },
975 {"stack-check", &flag_stack_check
, 1 },
976 {"argument-alias", &flag_argument_noalias
, 0 },
977 {"argument-noalias", &flag_argument_noalias
, 1 },
978 {"argument-noalias-global", &flag_argument_noalias
, 2 },
979 {"strict-aliasing", &flag_strict_aliasing
, 1 },
980 {"align-loops", &align_loops
, 0 },
981 {"align-jumps", &align_jumps
, 0 },
982 {"align-labels", &align_labels
, 0 },
983 {"align-functions", &align_functions
, 0 },
984 {"merge-constants", &flag_merge_constants
, 1 },
985 {"merge-all-constants", &flag_merge_constants
, 2 },
986 {"dump-unnumbered", &flag_dump_unnumbered
, 1 },
987 {"instrument-functions", &flag_instrument_function_entry_exit
, 1 },
988 {"zero-initialized-in-bss", &flag_zero_initialized_in_bss
, 1 },
989 {"leading-underscore", &flag_leading_underscore
, 1 },
990 {"ident", &flag_no_ident
, 0 },
991 { "peephole2", &flag_peephole2
, 1 },
992 {"finite-math-only", &flag_finite_math_only
, 1 },
993 { "guess-branch-probability", &flag_guess_branch_prob
, 1 },
994 {"math-errno", &flag_errno_math
, 1 },
995 {"trapping-math", &flag_trapping_math
, 1 },
996 {"rounding-math", &flag_rounding_math
, 1 },
997 {"unsafe-math-optimizations", &flag_unsafe_math_optimizations
, 1 },
998 {"signaling-nans", &flag_signaling_nans
, 1 },
999 {"bounds-check", &flag_bounds_check
, 1 },
1000 {"single-precision-constant", &flag_single_precision_constant
, 1 },
1001 {"time-report", &time_report
, 1 },
1002 {"mem-report", &mem_report
, 1 },
1003 { "trapv", &flag_trapv
, 1 },
1004 { "wrapv", &flag_wrapv
, 1 },
1005 { "new-ra", &flag_new_regalloc
, 1 },
1006 { "var-tracking", &flag_var_tracking
, 1}
1009 /* Here is a table, controlled by the tm.h file, listing each -m switch
1010 and which bits in `target_switches' it should set or clear.
1011 If VALUE is positive, it is bits to set.
1012 If VALUE is negative, -VALUE is bits to clear.
1013 (The sign bit is not used so there is no confusion.) */
1017 const char *const name
;
1019 const char *const description
;
1021 target_switches
[] = TARGET_SWITCHES
;
1023 /* This table is similar, but allows the switch to have a value. */
1025 #ifdef TARGET_OPTIONS
1028 const char *const prefix
;
1029 const char **const variable
;
1030 const char *const description
;
1031 const char *const value
;
1033 target_options
[] = TARGET_OPTIONS
;
1036 /* Nonzero means warn about function definitions that default the return type
1037 or that use a null return and have a return-type other than void. */
1039 int warn_return_type
;
1041 /* Output files for assembler code (real compiler output)
1042 and debugging dumps. */
1045 FILE *aux_info_file
;
1046 FILE *dump_file
= NULL
;
1047 FILE *cgraph_dump_file
= NULL
;
1049 /* The current working directory of a translation. It's generally the
1050 directory from which compilation was initiated, but a preprocessed
1051 file may specify the original directory in which it was
1054 static const char *src_pwd
;
1056 /* Initialize src_pwd with the given string, and return true. If it
1057 was already initialized, return false. As a special case, it may
1058 be called with a NULL argument to test whether src_pwd has NOT been
1062 set_src_pwd (const char *pwd
)
1066 if (strcmp (src_pwd
, pwd
) == 0)
1072 src_pwd
= xstrdup (pwd
);
1076 /* Return the directory from which the translation unit was initiated,
1077 in case set_src_pwd() was not called before to assign it a
1084 src_pwd
= getpwd ();
1089 /* Called when the start of a function definition is parsed,
1090 this function prints on stderr the name of the function. */
1092 announce_function (tree decl
)
1096 if (rtl_dump_and_exit
)
1097 verbatim ("%s ", IDENTIFIER_POINTER (DECL_NAME (decl
)));
1099 verbatim (" %s", lang_hooks
.decl_printable_name (decl
, 2));
1101 pp_needs_newline (global_dc
->printer
) = true;
1102 diagnostic_set_last_function (global_dc
);
1106 /* Set up a default flag_random_seed and local_tick, unless the user
1107 already specified one. */
1112 if (!flag_random_seed
)
1114 unsigned HOST_WIDE_INT value
;
1115 static char random_seed
[HOST_BITS_PER_WIDE_INT
/ 4 + 3];
1117 /* Get some more or less random data. */
1118 #ifdef HAVE_GETTIMEOFDAY
1122 gettimeofday (&tv
, NULL
);
1123 local_tick
= tv
.tv_sec
* 1000 + tv
.tv_usec
/ 1000;
1127 time_t now
= time (NULL
);
1129 if (now
!= (time_t)-1)
1130 local_tick
= (unsigned) now
;
1133 value
= local_tick
^ getpid ();
1135 sprintf (random_seed
, HOST_WIDE_INT_PRINT_HEX
, value
);
1136 flag_random_seed
= random_seed
;
1138 else if (!local_tick
)
1143 /* Decode the string P as an integral parameter.
1144 If the string is indeed an integer return its numeric value else
1145 issue an Invalid Option error for the option PNAME and return DEFVAL.
1146 If PNAME is zero just return DEFVAL, do not call error. */
1149 read_integral_parameter (const char *p
, const char *pname
, const int defval
)
1151 const char *endp
= p
;
1155 if (ISDIGIT (*endp
))
1164 error ("invalid option argument `%s'", pname
);
1171 /* Return the logarithm of X, base 2, considering X unsigned,
1172 if X is a power of 2. Otherwise, returns -1.
1174 This should be used via the `exact_log2' macro. */
1177 exact_log2_wide (unsigned HOST_WIDE_INT x
)
1180 /* Test for 0 or a power of 2. */
1181 if (x
== 0 || x
!= (x
& -x
))
1183 while ((x
>>= 1) != 0)
1188 /* Given X, an unsigned number, return the largest int Y such that 2**Y <= X.
1189 If X is 0, return -1.
1191 This should be used via the floor_log2 macro. */
1194 floor_log2_wide (unsigned HOST_WIDE_INT x
)
1203 /* Handler for fatal signals, such as SIGSEGV. These are transformed
1204 into ICE messages, which is much more user friendly. In case the
1205 error printer crashes, reset the signal to prevent infinite recursion. */
1208 crash_signal (int signo
)
1210 signal (signo
, SIG_DFL
);
1211 internal_error ("%s", strsignal (signo
));
1214 /* Arrange to dump core on error. (The regular error message is still
1215 printed first, except in the case of abort().) */
1218 setup_core_dumping (void)
1221 signal (SIGABRT
, SIG_DFL
);
1223 #if defined(HAVE_SETRLIMIT)
1226 if (getrlimit (RLIMIT_CORE
, &rlim
) != 0)
1227 fatal_error ("getting core file size maximum limit: %m");
1228 rlim
.rlim_cur
= rlim
.rlim_max
;
1229 if (setrlimit (RLIMIT_CORE
, &rlim
) != 0)
1230 fatal_error ("setting core file size limit to maximum: %m");
1233 diagnostic_abort_on_error (global_dc
);
1237 /* Strip off a legitimate source ending from the input string NAME of
1238 length LEN. Rather than having to know the names used by all of
1239 our front ends, we strip off an ending of a period followed by
1240 up to five characters. (Java uses ".class".) */
1243 strip_off_ending (char *name
, int len
)
1246 for (i
= 2; i
< 6 && len
> i
; i
++)
1248 if (name
[len
- i
] == '.')
1250 name
[len
- i
] = '\0';
1256 /* Output a quoted string. */
1259 output_quoted_string (FILE *asm_file
, const char *string
)
1261 #ifdef OUTPUT_QUOTED_STRING
1262 OUTPUT_QUOTED_STRING (asm_file
, string
);
1266 putc ('\"', asm_file
);
1267 while ((c
= *string
++) != 0)
1271 if (c
== '\"' || c
== '\\')
1272 putc ('\\', asm_file
);
1276 fprintf (asm_file
, "\\%03o", (unsigned char) c
);
1278 putc ('\"', asm_file
);
1282 /* Output a file name in the form wanted by System V. */
1285 output_file_directive (FILE *asm_file
, const char *input_name
)
1290 if (input_name
== NULL
)
1291 input_name
= "<stdin>";
1293 len
= strlen (input_name
);
1294 na
= input_name
+ len
;
1296 /* NA gets INPUT_NAME sans directory names. */
1297 while (na
> input_name
)
1299 if (IS_DIR_SEPARATOR (na
[-1]))
1304 #ifdef ASM_OUTPUT_SOURCE_FILENAME
1305 ASM_OUTPUT_SOURCE_FILENAME (asm_file
, na
);
1307 fprintf (asm_file
, "\t.file\t");
1308 output_quoted_string (asm_file
, na
);
1309 fputc ('\n', asm_file
);
1313 /* Do any final processing required for the declarations in VEC, of
1314 which there are LEN. We write out inline functions and variables
1315 that have been deferred until this point, but which are required.
1316 Returns nonzero if anything was put out. */
1319 wrapup_global_declarations (tree
*vec
, int len
)
1324 int output_something
= 0;
1326 for (i
= 0; i
< len
; i
++)
1330 /* We're not deferring this any longer. Assignment is
1331 conditional to avoid needlessly dirtying PCH pages. */
1332 if (DECL_DEFER_OUTPUT (decl
) != 0)
1333 DECL_DEFER_OUTPUT (decl
) = 0;
1335 if (TREE_CODE (decl
) == VAR_DECL
&& DECL_SIZE (decl
) == 0)
1336 lang_hooks
.finish_incomplete_decl (decl
);
1339 /* Now emit any global variables or functions that we have been
1340 putting off. We need to loop in case one of the things emitted
1341 here references another one which comes earlier in the list. */
1345 for (i
= 0; i
< len
; i
++)
1349 if (TREE_ASM_WRITTEN (decl
) || DECL_EXTERNAL (decl
))
1352 /* Don't write out static consts, unless we still need them.
1354 We also keep static consts if not optimizing (for debugging),
1355 unless the user specified -fno-keep-static-consts.
1356 ??? They might be better written into the debug information.
1357 This is possible when using DWARF.
1359 A language processor that wants static constants to be always
1360 written out (even if it is not used) is responsible for
1361 calling rest_of_decl_compilation itself. E.g. the C front-end
1362 calls rest_of_decl_compilation from finish_decl.
1363 One motivation for this is that is conventional in some
1364 environments to write things like:
1365 static const char rcsid[] = "... version string ...";
1366 intending to force the string to be in the executable.
1368 A language processor that would prefer to have unneeded
1369 static constants "optimized away" would just defer writing
1370 them out until here. E.g. C++ does this, because static
1371 constants are often defined in header files.
1373 ??? A tempting alternative (for both C and C++) would be
1374 to force a constant to be written if and only if it is
1375 defined in a main file, as opposed to an include file. */
1377 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
))
1381 if (flag_unit_at_a_time
1382 && cgraph_varpool_node (decl
)->finalized
)
1384 else if ((flag_unit_at_a_time
&& !cgraph_global_info_ready
)
1385 && (TREE_USED (decl
)
1386 || TREE_USED (DECL_ASSEMBLER_NAME (decl
))))
1388 else if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
1390 else if (DECL_COMDAT (decl
))
1392 else if (TREE_READONLY (decl
) && !TREE_PUBLIC (decl
)
1393 && (optimize
|| !flag_keep_static_consts
1394 || DECL_ARTIFICIAL (decl
)))
1400 rest_of_decl_compilation (decl
, NULL
, 1, 1);
1404 if (TREE_CODE (decl
) == FUNCTION_DECL
1405 && DECL_INITIAL (decl
) != 0
1406 && DECL_STRUCT_FUNCTION (decl
) != 0
1407 && DECL_STRUCT_FUNCTION (decl
)->saved_for_inline
1408 && (flag_keep_inline_functions
1409 || (TREE_PUBLIC (decl
) && !DECL_COMDAT (decl
))
1410 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
))))
1413 output_inline_function (decl
);
1418 output_something
= 1;
1422 return output_something
;
1425 /* Issue appropriate warnings for the global declarations in VEC (of
1426 which there are LEN). Output debugging information for them. */
1429 check_global_declarations (tree
*vec
, int len
)
1434 for (i
= 0; i
< len
; i
++)
1438 if (TREE_CODE (decl
) == VAR_DECL
&& TREE_STATIC (decl
)
1439 && ! TREE_ASM_WRITTEN (decl
))
1440 /* Cancel the RTL for this decl so that, if debugging info
1441 output for global variables is still to come,
1442 this one will be omitted. */
1443 SET_DECL_RTL (decl
, NULL_RTX
);
1445 /* Warn about any function
1446 declared static but not defined.
1447 We don't warn about variables,
1448 because many programs have static variables
1449 that exist only to get some text into the object file. */
1450 if (TREE_CODE (decl
) == FUNCTION_DECL
1451 && (warn_unused_function
1452 || TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
1453 && DECL_INITIAL (decl
) == 0
1454 && DECL_EXTERNAL (decl
)
1455 && ! DECL_ARTIFICIAL (decl
)
1456 && ! TREE_PUBLIC (decl
))
1458 if (TREE_SYMBOL_REFERENCED (DECL_ASSEMBLER_NAME (decl
)))
1459 pedwarn ("%J'%F' used but never defined", decl
, decl
);
1461 warning ("%J'%F' declared `static' but never defined", decl
, decl
);
1462 /* This symbol is effectively an "extern" declaration now. */
1463 TREE_PUBLIC (decl
) = 1;
1464 assemble_external (decl
);
1467 /* Warn about static fns or vars defined but not used. */
1468 if (((warn_unused_function
&& TREE_CODE (decl
) == FUNCTION_DECL
)
1469 /* We don't warn about "static const" variables because the
1470 "rcs_id" idiom uses that construction. */
1471 || (warn_unused_variable
1472 && TREE_CODE (decl
) == VAR_DECL
&& ! TREE_READONLY (decl
)))
1473 && ! DECL_IN_SYSTEM_HEADER (decl
)
1474 && ! TREE_USED (decl
)
1475 /* The TREE_USED bit for file-scope decls is kept in the identifier,
1476 to handle multiple external decls in different scopes. */
1477 && ! TREE_USED (DECL_NAME (decl
))
1478 && ! DECL_EXTERNAL (decl
)
1479 && ! TREE_PUBLIC (decl
)
1480 /* A volatile variable might be used in some non-obvious way. */
1481 && ! TREE_THIS_VOLATILE (decl
)
1482 /* Global register variables must be declared to reserve them. */
1483 && ! (TREE_CODE (decl
) == VAR_DECL
&& DECL_REGISTER (decl
))
1484 /* Otherwise, ask the language. */
1485 && lang_hooks
.decls
.warn_unused_global (decl
))
1486 warning ("%J'%D' defined but not used", decl
, decl
);
1488 /* Avoid confusing the debug information machinery when there are
1490 if (errorcount
== 0 && sorrycount
== 0)
1492 timevar_push (TV_SYMOUT
);
1493 (*debug_hooks
->global_decl
) (decl
);
1494 timevar_pop (TV_SYMOUT
);
1499 /* Warn about a use of an identifier which was marked deprecated. */
1501 warn_deprecated_use (tree node
)
1503 if (node
== 0 || !warn_deprecated_decl
)
1507 warning ("`%s' is deprecated (declared at %s:%d)",
1508 IDENTIFIER_POINTER (DECL_NAME (node
)),
1509 DECL_SOURCE_FILE (node
), DECL_SOURCE_LINE (node
));
1510 else if (TYPE_P (node
))
1512 const char *what
= NULL
;
1513 tree decl
= TYPE_STUB_DECL (node
);
1515 if (TREE_CODE (TYPE_NAME (node
)) == IDENTIFIER_NODE
)
1516 what
= IDENTIFIER_POINTER (TYPE_NAME (node
));
1517 else if (TREE_CODE (TYPE_NAME (node
)) == TYPE_DECL
1518 && DECL_NAME (TYPE_NAME (node
)))
1519 what
= IDENTIFIER_POINTER (DECL_NAME (TYPE_NAME (node
)));
1524 warning ("`%s' is deprecated (declared at %s:%d)", what
,
1525 DECL_SOURCE_FILE (decl
), DECL_SOURCE_LINE (decl
));
1527 warning ("`%s' is deprecated", what
);
1530 warning ("type is deprecated (declared at %s:%d)",
1531 DECL_SOURCE_FILE (decl
), DECL_SOURCE_LINE (decl
));
1533 warning ("type is deprecated");
1537 /* Save the current INPUT_LOCATION on the top entry in the
1538 INPUT_FILE_STACK. Push a new entry for FILE and LINE, and set the
1539 INPUT_LOCATION accordingly. */
1542 push_srcloc (const char *file
, int line
)
1544 struct file_stack
*fs
;
1546 fs
= xmalloc (sizeof (struct file_stack
));
1547 fs
->location
= input_location
;
1548 fs
->next
= input_file_stack
;
1549 input_filename
= file
;
1551 input_file_stack
= fs
;
1552 input_file_stack_tick
++;
1555 /* Pop the top entry off the stack of presently open source files.
1556 Restore the INPUT_LOCATION from the new topmost entry on the
1562 struct file_stack
*fs
;
1564 fs
= input_file_stack
;
1565 input_location
= fs
->location
;
1566 input_file_stack
= fs
->next
;
1568 input_file_stack_tick
++;
1571 /* Compile an entire translation unit. Write a file of assembly
1572 output and various debugging dumps. */
1577 /* Initialize yet another pass. */
1579 init_final (main_input_filename
);
1580 coverage_init (aux_base_name
);
1582 timevar_push (TV_PARSE
);
1584 /* Call the parser, which parses the entire file (calling
1585 rest_of_compilation for each function). */
1586 lang_hooks
.parse_file (set_yydebug
);
1588 /* In case there were missing block closers,
1589 get us back to the global binding level. */
1590 lang_hooks
.clear_binding_stack ();
1592 /* Compilation is now finished except for writing
1593 what's left of the symbol table output. */
1594 timevar_pop (TV_PARSE
);
1596 if (flag_syntax_only
)
1599 lang_hooks
.decls
.final_write_globals ();
1601 cgraph_varpool_assemble_pending_decls ();
1603 /* This must occur after the loop to output deferred functions.
1604 Else the coverage initializer would not be emitted if all the
1605 functions in this compilation unit were deferred. */
1608 /* Write out any pending weak symbol declarations. */
1612 /* Do dbx symbols. */
1613 timevar_push (TV_SYMOUT
);
1615 #ifdef DWARF2_UNWIND_INFO
1616 if (dwarf2out_do_frame ())
1617 dwarf2out_frame_finish ();
1620 (*debug_hooks
->finish
) (main_input_filename
);
1621 timevar_pop (TV_SYMOUT
);
1623 /* Output some stuff at end of file if nec. */
1625 dw2_output_indirect_constants ();
1627 targetm
.asm_out
.file_end ();
1629 /* Attach a special .ident directive to the end of the file to identify
1630 the version of GCC which compiled this code. The format of the .ident
1631 string is patterned after the ones produced by native SVR4 compilers. */
1634 fprintf (asm_out_file
, "%s\"GCC: (GNU) %s\"\n",
1635 IDENT_ASM_OP
, version_string
);
1639 /* Display help for target options. */
1641 display_target_options (void)
1644 static bool displayed
= false;
1646 /* Avoid double printing for --help --target-help. */
1652 if (ARRAY_SIZE (target_switches
) > 1
1653 #ifdef TARGET_OPTIONS
1654 || ARRAY_SIZE (target_options
) > 1
1662 printf (_("\nTarget specific options:\n"));
1664 for (i
= ARRAY_SIZE (target_switches
); i
--;)
1666 const char *option
= target_switches
[i
].name
;
1667 const char *description
= target_switches
[i
].description
;
1669 if (option
== NULL
|| *option
== 0)
1671 else if (description
== NULL
)
1676 printf (_(" -m%-23s [undocumented]\n"), option
);
1678 else if (*description
!= 0)
1679 doc
+= printf (" -m%-23s %s\n", option
, _(description
));
1682 #ifdef TARGET_OPTIONS
1683 for (i
= ARRAY_SIZE (target_options
); i
--;)
1685 const char *option
= target_options
[i
].prefix
;
1686 const char *description
= target_options
[i
].description
;
1688 if (option
== NULL
|| *option
== 0)
1690 else if (description
== NULL
)
1695 printf (_(" -m%-23s [undocumented]\n"), option
);
1697 else if (*description
!= 0)
1698 doc
+= printf (" -m%-23s %s\n", option
, _(description
));
1704 printf (_("\nThere are undocumented target specific options as well.\n"));
1706 printf (_(" They exist, but they are not documented.\n"));
1711 /* Parse a -d... command line switch. */
1714 decode_d_option (const char *arg
)
1725 flag_print_asm_name
= 1;
1728 flag_dump_rtl_in_asm
= 1;
1729 flag_print_asm_name
= 1;
1732 graph_dump_format
= vcg
;
1735 rtl_dump_and_exit
= 1;
1740 case 'D': /* These are handled by the preprocessor. */
1744 setup_core_dumping();
1749 if (!enable_rtl_dump_file (c
))
1750 warning ("unrecognized gcc debugging option: %c", c
);
1755 /* Indexed by enum debug_info_type. */
1756 const char *const debug_type_names
[] =
1758 "none", "stabs", "coff", "dwarf-1", "dwarf-2", "xcoff", "vms"
1761 /* Decode -m switches. */
1762 /* Decode the switch -mNAME. */
1765 set_target_switch (const char *name
)
1768 int valid_target_option
= 0;
1770 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
1771 if (!strcmp (target_switches
[j
].name
, name
))
1773 if (target_switches
[j
].value
< 0)
1774 target_flags
&= ~-target_switches
[j
].value
;
1776 target_flags
|= target_switches
[j
].value
;
1779 if (target_switches
[j
].value
< 0)
1780 target_flags_explicit
|= -target_switches
[j
].value
;
1782 target_flags_explicit
|= target_switches
[j
].value
;
1784 valid_target_option
= 1;
1787 #ifdef TARGET_OPTIONS
1788 if (!valid_target_option
)
1789 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
1791 int len
= strlen (target_options
[j
].prefix
);
1792 if (target_options
[j
].value
)
1794 if (!strcmp (target_options
[j
].prefix
, name
))
1796 *target_options
[j
].variable
= target_options
[j
].value
;
1797 valid_target_option
= 1;
1802 if (!strncmp (target_options
[j
].prefix
, name
, len
))
1804 *target_options
[j
].variable
= name
+ len
;
1805 valid_target_option
= 1;
1811 if (!valid_target_option
)
1812 error ("invalid option `%s'", name
);
1815 /* Print version information to FILE.
1816 Each line begins with INDENT (for the case where FILE is the
1817 assembler output file). */
1820 print_version (FILE *file
, const char *indent
)
1823 #define __VERSION__ "[?]"
1827 "%s%s%s version %s (%s)\n%s\tcompiled by GNU C version %s.\n"
1829 "%s%s%s version %s (%s) compiled by CC.\n"
1831 , indent
, *indent
!= 0 ? " " : "",
1832 lang_hooks
.name
, version_string
, TARGET_NAME
,
1833 indent
, __VERSION__
);
1834 fnotice (file
, "%s%sGGC heuristics: --param ggc-min-expand=%d --param ggc-min-heapsize=%d\n",
1835 indent
, *indent
!= 0 ? " " : "",
1836 PARAM_VALUE (GGC_MIN_EXPAND
), PARAM_VALUE (GGC_MIN_HEAPSIZE
));
1839 /* Print an option value and return the adjusted position in the line.
1840 ??? We don't handle error returns from fprintf (disk full); presumably
1841 other code will catch a disk full though. */
1844 print_single_switch (FILE *file
, int pos
, int max
,
1845 const char *indent
, const char *sep
, const char *term
,
1846 const char *type
, const char *name
)
1848 /* The ultrix fprintf returns 0 on success, so compute the result we want
1849 here since we need it for the following test. */
1850 int len
= strlen (sep
) + strlen (type
) + strlen (name
);
1855 fprintf (file
, "%s", term
);
1860 fprintf (file
, "%s", indent
);
1861 pos
= strlen (indent
);
1863 fprintf (file
, "%s%s%s", sep
, type
, name
);
1868 /* Print active target switches to FILE.
1869 POS is the current cursor position and MAX is the size of a "line".
1870 Each line begins with INDENT and ends with TERM.
1871 Each switch is separated from the next by SEP. */
1874 print_switch_values (FILE *file
, int pos
, int max
,
1875 const char *indent
, const char *sep
, const char *term
)
1880 /* Fill in the -frandom-seed option, if the user didn't pass it, so
1881 that it can be printed below. This helps reproducibility. */
1884 /* Print the options as passed. */
1885 pos
= print_single_switch (file
, pos
, max
, indent
, *indent
? " " : "", term
,
1886 _("options passed: "), "");
1888 for (p
= &save_argv
[1]; *p
!= NULL
; p
++)
1892 if (strcmp (*p
, "-o") == 0)
1898 if (strcmp (*p
, "-quiet") == 0)
1900 if (strcmp (*p
, "-version") == 0)
1905 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
, *p
, "");
1908 fprintf (file
, "%s", term
);
1910 /* Print the -f and -m options that have been enabled.
1911 We don't handle language specific options but printing argv
1914 pos
= print_single_switch (file
, 0, max
, indent
, *indent
? " " : "", term
,
1915 _("options enabled: "), "");
1917 for (j
= 0; j
< ARRAY_SIZE (f_options
); j
++)
1918 if (*f_options
[j
].variable
== f_options
[j
].on_value
)
1919 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1920 "-f", f_options
[j
].string
);
1922 /* Print target specific options. */
1924 for (j
= 0; j
< ARRAY_SIZE (target_switches
); j
++)
1925 if (target_switches
[j
].name
[0] != '\0'
1926 && target_switches
[j
].value
> 0
1927 && ((target_switches
[j
].value
& target_flags
)
1928 == target_switches
[j
].value
))
1930 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1931 "-m", target_switches
[j
].name
);
1934 #ifdef TARGET_OPTIONS
1935 for (j
= 0; j
< ARRAY_SIZE (target_options
); j
++)
1936 if (*target_options
[j
].variable
!= NULL
)
1939 sprintf (prefix
, "-m%s", target_options
[j
].prefix
);
1940 pos
= print_single_switch (file
, pos
, max
, indent
, sep
, term
,
1941 prefix
, *target_options
[j
].variable
);
1945 fprintf (file
, "%s", term
);
1948 /* Open assembly code output file. Do this even if -fsyntax-only is
1949 on, because then the driver will have provided the name of a
1950 temporary file or bit bucket for us. NAME is the file specified on
1951 the command line, possibly NULL. */
1953 init_asm_output (const char *name
)
1955 if (name
== NULL
&& asm_file_name
== 0)
1956 asm_out_file
= stdout
;
1959 if (asm_file_name
== 0)
1961 int len
= strlen (dump_base_name
);
1962 char *dumpname
= xmalloc (len
+ 6);
1963 memcpy (dumpname
, dump_base_name
, len
+ 1);
1964 strip_off_ending (dumpname
, len
);
1965 strcat (dumpname
, ".s");
1966 asm_file_name
= dumpname
;
1968 if (!strcmp (asm_file_name
, "-"))
1969 asm_out_file
= stdout
;
1971 asm_out_file
= fopen (asm_file_name
, "w+");
1972 if (asm_out_file
== 0)
1973 fatal_error ("can't open %s for writing: %m", asm_file_name
);
1976 #ifdef IO_BUFFER_SIZE
1977 setvbuf (asm_out_file
, xmalloc (IO_BUFFER_SIZE
),
1978 _IOFBF
, IO_BUFFER_SIZE
);
1981 if (!flag_syntax_only
)
1983 targetm
.asm_out
.file_start ();
1985 #ifdef ASM_COMMENT_START
1986 if (flag_verbose_asm
)
1988 /* Print the list of options in effect. */
1989 print_version (asm_out_file
, ASM_COMMENT_START
);
1990 print_switch_values (asm_out_file
, 0, MAX_LINE
,
1991 ASM_COMMENT_START
, " ", "\n");
1992 /* Add a blank line here so it appears in assembler output but not
1994 fprintf (asm_out_file
, "\n");
2000 /* Default version of get_pch_validity.
2001 By default, every flag difference is fatal; that will be mostly right for
2002 most targets, but completely right for very few. */
2005 default_get_pch_validity (size_t *len
)
2007 #ifdef TARGET_OPTIONS
2012 *len
= sizeof (target_flags
) + 2;
2013 #ifdef TARGET_OPTIONS
2014 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
2017 if (*target_options
[i
].variable
)
2018 *len
+= strlen (*target_options
[i
].variable
);
2022 result
= r
= xmalloc (*len
);
2026 memcpy (r
, &target_flags
, sizeof (target_flags
));
2027 r
+= sizeof (target_flags
);
2029 #ifdef TARGET_OPTIONS
2030 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
2032 const char *str
= *target_options
[i
].variable
;
2036 l
= strlen (str
) + 1;
2045 /* Default version of pch_valid_p. */
2048 default_pch_valid_p (const void *data_p
, size_t len
)
2050 const char *data
= (const char *)data_p
;
2051 const char *flag_that_differs
= NULL
;
2054 /* -fpic and -fpie also usually make a PCH invalid. */
2055 if (data
[0] != flag_pic
)
2056 return _("created and used with different settings of -fpic");
2057 if (data
[1] != flag_pie
)
2058 return _("created and used with different settings of -fpie");
2061 /* Check target_flags. */
2062 if (memcmp (data
, &target_flags
, sizeof (target_flags
)) != 0)
2064 for (i
= 0; i
< ARRAY_SIZE (target_switches
); i
++)
2069 memcpy (&tf
, data
, sizeof (target_flags
));
2071 bits
= target_switches
[i
].value
;
2074 if ((target_flags
& bits
) != (tf
& bits
))
2076 flag_that_differs
= target_switches
[i
].name
;
2082 data
+= sizeof (target_flags
);
2083 len
-= sizeof (target_flags
);
2085 /* Check string options. */
2086 #ifdef TARGET_OPTIONS
2087 for (i
= 0; i
< ARRAY_SIZE (target_options
); i
++)
2089 const char *str
= *target_options
[i
].variable
;
2093 l
= strlen (str
) + 1;
2094 if (len
< l
|| memcmp (data
, str
, l
) != 0)
2096 flag_that_differs
= target_options
[i
].prefix
;
2109 asprintf (&r
, _("created and used with differing settings of `-m%s'"),
2112 return _("out of memory");
2117 /* Default tree printer. Handles declarations only. */
2119 default_tree_printer (pretty_printer
* pp
, text_info
*text
)
2121 switch (*text
->format_spec
)
2127 tree t
= va_arg (*text
->args_ptr
, tree
);
2128 const char *n
= DECL_NAME (t
)
2129 ? lang_hooks
.decl_printable_name (t
, 2)
2140 /* Initialization of the front end environment, before command line
2141 options are parsed. Signal handlers, internationalization etc.
2142 ARGV0 is main's argv[0]. */
2144 general_init (const char *argv0
)
2148 p
= argv0
+ strlen (argv0
);
2149 while (p
!= argv0
&& !IS_DIR_SEPARATOR (p
[-1]))
2153 xmalloc_set_program_name (progname
);
2157 gcc_init_libintl ();
2159 /* Initialize the diagnostics reporting machinery, so option parsing
2160 can give warnings and errors. */
2161 diagnostic_initialize (global_dc
);
2162 /* Set a default printer. Language specific initializations will
2163 override it later. */
2164 pp_format_decoder (global_dc
->printer
) = &default_tree_printer
;
2166 /* Trap fatal signals, e.g. SIGSEGV, and convert them to ICE messages. */
2168 signal (SIGSEGV
, crash_signal
);
2171 signal (SIGILL
, crash_signal
);
2174 signal (SIGBUS
, crash_signal
);
2177 signal (SIGABRT
, crash_signal
);
2179 #if defined SIGIOT && (!defined SIGABRT || SIGABRT != SIGIOT)
2180 signal (SIGIOT
, crash_signal
);
2183 signal (SIGFPE
, crash_signal
);
2186 /* Other host-specific signal setup. */
2187 (*host_hooks
.extra_signals
)();
2189 /* Initialize the garbage-collector, string pools and tree type hash
2193 linemap_init (&line_table
);
2196 /* Initialize register usage now so switches may override. */
2199 /* Register the language-independent parameters. */
2200 add_params (lang_independent_params
, LAST_PARAM
);
2202 /* This must be done after add_params but before argument processing. */
2203 init_ggc_heuristics();
2206 /* Process the options that have been parsed. */
2208 process_options (void)
2210 /* Allow the front end to perform consistency checks and do further
2211 initialization based on the command line options. This hook also
2212 sets the original filename if appropriate (e.g. foo.i -> foo.c)
2213 so we can correctly initialize debug output. */
2214 no_backend
= lang_hooks
.post_options (&main_input_filename
);
2215 input_filename
= main_input_filename
;
2217 #ifdef OVERRIDE_OPTIONS
2218 /* Some machines may reject certain combinations of options. */
2222 /* Set aux_base_name if not already set. */
2225 else if (main_input_filename
)
2227 char *name
= xstrdup (lbasename (main_input_filename
));
2229 strip_off_ending (name
, strlen (name
));
2230 aux_base_name
= name
;
2233 aux_base_name
= "gccaux";
2235 /* Set up the align_*_log variables, defaulting them to 1 if they
2236 were still unset. */
2237 if (align_loops
<= 0) align_loops
= 1;
2238 if (align_loops_max_skip
> align_loops
|| !align_loops
)
2239 align_loops_max_skip
= align_loops
- 1;
2240 align_loops_log
= floor_log2 (align_loops
* 2 - 1);
2241 if (align_jumps
<= 0) align_jumps
= 1;
2242 if (align_jumps_max_skip
> align_jumps
|| !align_jumps
)
2243 align_jumps_max_skip
= align_jumps
- 1;
2244 align_jumps_log
= floor_log2 (align_jumps
* 2 - 1);
2245 if (align_labels
<= 0) align_labels
= 1;
2246 align_labels_log
= floor_log2 (align_labels
* 2 - 1);
2247 if (align_labels_max_skip
> align_labels
|| !align_labels
)
2248 align_labels_max_skip
= align_labels
- 1;
2249 if (align_functions
<= 0) align_functions
= 1;
2250 align_functions_log
= floor_log2 (align_functions
* 2 - 1);
2252 /* Unrolling all loops implies that standard loop unrolling must also
2254 if (flag_unroll_all_loops
)
2255 flag_unroll_loops
= 1;
2257 if (flag_unroll_loops
)
2259 flag_old_unroll_loops
= 0;
2260 flag_old_unroll_all_loops
= 0;
2263 if (flag_old_unroll_all_loops
)
2264 flag_old_unroll_loops
= 1;
2266 /* Old loop unrolling requires that strength_reduction be on also. Silently
2267 turn on strength reduction here if it isn't already on. Also, the loop
2268 unrolling code assumes that cse will be run after loop, so that must
2269 be turned on also. */
2270 if (flag_old_unroll_loops
)
2272 flag_strength_reduce
= 1;
2273 flag_rerun_cse_after_loop
= 1;
2275 if (flag_unroll_loops
|| flag_peel_loops
)
2276 flag_rerun_cse_after_loop
= 1;
2278 if (flag_non_call_exceptions
)
2279 flag_asynchronous_unwind_tables
= 1;
2280 if (flag_asynchronous_unwind_tables
)
2281 flag_unwind_tables
= 1;
2283 /* Disable unit-at-a-time mode for frontends not supporting callgraph
2285 if (flag_unit_at_a_time
&& ! lang_hooks
.callgraph
.expand_function
)
2286 flag_unit_at_a_time
= 0;
2288 if (flag_value_profile_transformations
)
2289 flag_profile_values
= 1;
2291 /* Warn about options that are not supported on this machine. */
2292 #ifndef INSN_SCHEDULING
2293 if (flag_schedule_insns
|| flag_schedule_insns_after_reload
)
2294 warning ("instruction scheduling not supported on this target machine");
2297 if (flag_delayed_branch
)
2298 warning ("this target machine does not have delayed branches");
2301 user_label_prefix
= USER_LABEL_PREFIX
;
2302 if (flag_leading_underscore
!= -1)
2304 /* If the default prefix is more complicated than "" or "_",
2305 issue a warning and ignore this option. */
2306 if (user_label_prefix
[0] == 0 ||
2307 (user_label_prefix
[0] == '_' && user_label_prefix
[1] == 0))
2309 user_label_prefix
= flag_leading_underscore
? "_" : "";
2312 warning ("-f%sleading-underscore not supported on this target machine",
2313 flag_leading_underscore
? "" : "no-");
2316 /* If we are in verbose mode, write out the version and maybe all the
2317 option flags in use. */
2320 print_version (stderr
, "");
2322 print_switch_values (stderr
, 0, MAX_LINE
, "", " ", "\n");
2325 if (flag_syntax_only
)
2327 write_symbols
= NO_DEBUG
;
2331 /* A lot of code assumes write_symbols == NO_DEBUG if the debugging
2333 if (debug_info_level
== DINFO_LEVEL_NONE
)
2334 write_symbols
= NO_DEBUG
;
2336 /* Now we know write_symbols, set up the debug hooks based on it.
2337 By default we do nothing for debug output. */
2338 if (write_symbols
== NO_DEBUG
)
2339 debug_hooks
= &do_nothing_debug_hooks
;
2340 #if defined(DBX_DEBUGGING_INFO)
2341 else if (write_symbols
== DBX_DEBUG
)
2342 debug_hooks
= &dbx_debug_hooks
;
2344 #if defined(XCOFF_DEBUGGING_INFO)
2345 else if (write_symbols
== XCOFF_DEBUG
)
2346 debug_hooks
= &xcoff_debug_hooks
;
2348 #ifdef SDB_DEBUGGING_INFO
2349 else if (write_symbols
== SDB_DEBUG
)
2350 debug_hooks
= &sdb_debug_hooks
;
2352 #ifdef DWARF2_DEBUGGING_INFO
2353 else if (write_symbols
== DWARF2_DEBUG
)
2354 debug_hooks
= &dwarf2_debug_hooks
;
2356 #ifdef VMS_DEBUGGING_INFO
2357 else if (write_symbols
== VMS_DEBUG
|| write_symbols
== VMS_AND_DWARF2_DEBUG
)
2358 debug_hooks
= &vmsdbg_debug_hooks
;
2361 error ("target system does not support the \"%s\" debug format",
2362 debug_type_names
[write_symbols
]);
2364 /* Now we know which debug output will be used so we can set
2365 flag_var_tracking if user has not specified it. */
2366 if (flag_var_tracking
== AUTODETECT_FLAG_VAR_TRACKING
)
2368 /* User has not specified -f(no-)var-tracking so autodetect it. */
2370 = (optimize
>= 1 && debug_info_level
>= DINFO_LEVEL_NORMAL
2371 && debug_hooks
->var_location
!= do_nothing_debug_hooks
.var_location
);
2374 /* If auxiliary info generation is desired, open the output file.
2375 This goes in the same directory as the source file--unlike
2376 all the other output files. */
2377 if (flag_gen_aux_info
)
2379 aux_info_file
= fopen (aux_info_file_name
, "w");
2380 if (aux_info_file
== 0)
2381 fatal_error ("can't open %s: %m", aux_info_file_name
);
2384 if (! targetm
.have_named_sections
)
2386 if (flag_function_sections
)
2388 warning ("-ffunction-sections not supported for this target");
2389 flag_function_sections
= 0;
2391 if (flag_data_sections
)
2393 warning ("-fdata-sections not supported for this target");
2394 flag_data_sections
= 0;
2398 if (flag_function_sections
&& profile_flag
)
2400 warning ("-ffunction-sections disabled; it makes profiling impossible");
2401 flag_function_sections
= 0;
2404 #ifndef HAVE_prefetch
2405 if (flag_prefetch_loop_arrays
)
2407 warning ("-fprefetch-loop-arrays not supported for this target");
2408 flag_prefetch_loop_arrays
= 0;
2411 if (flag_prefetch_loop_arrays
&& !HAVE_prefetch
)
2413 warning ("-fprefetch-loop-arrays not supported for this target (try -march switches)");
2414 flag_prefetch_loop_arrays
= 0;
2418 /* This combination of options isn't handled for i386 targets and doesn't
2419 make much sense anyway, so don't allow it. */
2420 if (flag_prefetch_loop_arrays
&& optimize_size
)
2422 warning ("-fprefetch-loop-arrays is not supported with -Os");
2423 flag_prefetch_loop_arrays
= 0;
2426 #ifndef OBJECT_FORMAT_ELF
2427 if (flag_function_sections
&& write_symbols
!= NO_DEBUG
)
2428 warning ("-ffunction-sections may affect debugging on some targets");
2431 /* The presence of IEEE signaling NaNs, implies all math can trap. */
2432 if (flag_signaling_nans
)
2433 flag_trapping_math
= 1;
2436 /* Initialize the compiler back end. */
2440 init_adjust_machine_modes ();
2442 init_emit_once (debug_info_level
== DINFO_LEVEL_NORMAL
2443 || debug_info_level
== DINFO_LEVEL_VERBOSE
2444 #ifdef VMS_DEBUGGING_INFO
2445 /* Enable line number info for traceback. */
2446 || debug_info_level
> DINFO_LEVEL_NONE
2448 || flag_test_coverage
2449 || warn_notreached
);
2452 init_fake_stack_mems ();
2456 init_function_once ();
2457 init_varasm_once ();
2459 /* The following initialization functions need to generate rtl, so
2460 provide a dummy function context for them. */
2461 init_dummy_function_start ();
2463 if (flag_caller_saves
)
2464 init_caller_save ();
2465 expand_dummy_function_end ();
2468 /* Language-dependent initialization. Returns nonzero on success. */
2470 lang_dependent_init (const char *name
)
2472 if (dump_base_name
== 0)
2473 dump_base_name
= name
? name
: "gccdump";
2475 /* Other front-end initialization. */
2476 if (lang_hooks
.init () == 0)
2479 init_asm_output (name
);
2481 /* These create various _DECL nodes, so need to be called after the
2482 front end is initialized. */
2485 init_optimization_passes ();
2487 /* The following initialization functions need to generate rtl, so
2488 provide a dummy function context for them. */
2489 init_dummy_function_start ();
2491 expand_dummy_function_end ();
2493 /* If dbx symbol table desired, initialize writing it and output the
2494 predefined types. */
2495 timevar_push (TV_SYMOUT
);
2497 #ifdef DWARF2_UNWIND_INFO
2498 if (dwarf2out_do_frame ())
2499 dwarf2out_frame_init ();
2502 /* Now we have the correct original filename, we can initialize
2504 (*debug_hooks
->init
) (name
);
2506 timevar_pop (TV_SYMOUT
);
2511 /* Clean up: close opened files, etc. */
2516 /* Close the dump files. */
2517 if (flag_gen_aux_info
)
2519 fclose (aux_info_file
);
2521 unlink (aux_info_file_name
);
2524 /* Close non-debugging input and output files. Take special care to note
2525 whether fclose returns an error, since the pages might still be on the
2526 buffer chain while the file is open. */
2530 if (ferror (asm_out_file
) != 0)
2531 fatal_error ("error writing to %s: %m", asm_file_name
);
2532 if (fclose (asm_out_file
) != 0)
2533 fatal_error ("error closing %s: %m", asm_file_name
);
2536 finish_optimization_passes ();
2540 ggc_print_statistics ();
2541 stringpool_statistics ();
2542 dump_tree_statistics ();
2543 dump_rtx_statistics ();
2544 dump_varray_statistics ();
2545 dump_alloc_pool_statistics ();
2546 dump_ggc_loc_statistics ();
2549 /* Free up memory for the benefit of leak detectors. */
2552 /* Language-specific end of compilation actions. */
2553 lang_hooks
.finish ();
2556 /* Initialize the compiler, and compile the input file. */
2560 /* Initialize timing first. The C front ends read the main file in
2561 the post_options hook, and C++ does file timings. */
2562 if (time_report
|| !quiet_flag
|| flag_detailed_statistics
)
2564 timevar_start (TV_TOTAL
);
2568 /* Don't do any more if an error has already occurred. */
2571 /* Set up the back-end if requested. */
2575 /* Language-dependent initialization. Returns true on success. */
2576 if (lang_dependent_init (main_input_filename
))
2582 /* Stop timing and print the times. */
2583 timevar_stop (TV_TOTAL
);
2584 timevar_print (stderr
);
2587 /* Entry point of cc1, cc1plus, jc1, f771, etc.
2588 Exit code is FATAL_EXIT_CODE if can't open files or if there were
2589 any errors, or SUCCESS_EXIT_CODE if compilation succeeded.
2591 It is not safe to call this function more than once. */
2594 toplev_main (unsigned int argc
, const char **argv
)
2598 /* Initialization of GCC's environment, and diagnostics. */
2599 general_init (argv
[0]);
2601 /* Parse the options and do minimal processing; basically just
2602 enough to default flags appropriately. */
2603 decode_options (argc
, argv
);
2607 /* Exit early if we can (e.g. -help). */
2608 if (!exit_after_options
)
2611 if (errorcount
|| sorrycount
)
2612 return (FATAL_EXIT_CODE
);
2614 return (SUCCESS_EXIT_CODE
);