-/* Compilation switch flag definitions for GNU CC.
- Copyright (C) 1987, 88, 94-98, 1999 Free Software Foundation, Inc.
+/* Compilation switch flag definitions for GCC.
+ Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002,
+ 2003, 2004
+ Free Software Foundation, Inc.
-This file is part of GNU CC.
+This file is part of GCC.
-GNU CC is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
-GNU CC is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+GCC is distributed in the hope that it will be useful, but WITHOUT ANY
+WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
You should have received a copy of the GNU General Public License
-along with GNU CC; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+along with GCC; see the file COPYING. If not, write to the Free
+Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA. */
-/* Name of the input .c file being compiled. */
-extern char *main_input_filename;
+#ifndef GCC_FLAGS_H
+#define GCC_FLAGS_H
enum debug_info_type
{
SDB_DEBUG, /* Write COFF for (old) SDB (using sdbout.c). */
DWARF_DEBUG, /* Write Dwarf debug info (using dwarfout.c). */
DWARF2_DEBUG, /* Write Dwarf v2 debug info (using dwarf2out.c). */
- XCOFF_DEBUG /* Write IBM/Xcoff debug info (using dbxout.c). */
+ XCOFF_DEBUG, /* Write IBM/Xcoff debug info (using dbxout.c). */
+ VMS_DEBUG, /* Write VMS debug info (using vmsdbgout.c). */
+ VMS_AND_DWARF2_DEBUG /* Write VMS debug info (using vmsdbgout.c).
+ and DWARF v2 debug info (using dwarf2out.c). */
};
/* Specify which kind of debugging info to generate. */
extern enum debug_info_type write_symbols;
+/* Names of debug_info_type, for error messages. */
+extern const char *const debug_type_names[];
+
enum debug_info_level
{
DINFO_LEVEL_NONE, /* Write no debugging info. */
DINFO_LEVEL_TERSE, /* Write minimal info to support tracebacks only. */
- DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */
+ DINFO_LEVEL_NORMAL, /* Write info for all declarations (and line table). */
DINFO_LEVEL_VERBOSE /* Write normal info plus #define/#undef info. */
};
/* Nonzero means use GNU-only extensions in the generated symbolic
debugging information. */
-extern int use_gnu_debug_info_extensions;
+extern bool use_gnu_debug_info_extensions;
+
+/* Nonzero means emit debugging information only for symbols which are used. */
+extern int flag_debug_only_used_symbols;
/* Nonzero means do optimizations. -opt. */
extern int optimize_size;
-/* Nonzero means do stupid register allocation. -noreg.
- Currently, this is 1 if `optimize' is 0. */
-
-extern int obey_regdecls;
-
/* Don't print functions as they are compiled and don't print
times taken by the various passes. -quiet. */
extern int quiet_flag;
+/* Print memory still in use at end of compilation (which may have little
+ to do with peak memory consumption). -fmem-report. */
+
+extern int mem_report;
+
/* Don't print warning messages. -w. */
-extern int inhibit_warnings;
+extern bool inhibit_warnings;
+
+/* Don't suppress warnings from system headers. -Wsystem-headers. */
-/* Do print extra warnings (such as for uninitialized variables). -W. */
+extern bool warn_system_headers;
-extern int extra_warnings;
+/* Do print extra warnings (such as for uninitialized variables).
+ -W/-Wextra. */
-/* Nonzero to warn about unused local variables. */
+extern bool extra_warnings;
-extern int warn_unused;
+/* If -Werror. */
+
+extern bool warnings_are_errors;
+
+/* Nonzero to warn about unused variables, functions et.al. Use
+ set_Wunused() to update the -Wunused-* flags that correspond to the
+ -Wunused option. */
+
+extern void set_Wunused (int setting);
+
+extern bool warn_unused_function;
+extern bool warn_unused_label;
+extern bool warn_unused_parameter;
+extern bool warn_unused_variable;
+extern bool warn_unused_value;
/* Nonzero to warn about code which is never reached. */
-extern int warn_notreached;
+extern bool warn_notreached;
/* Nonzero means warn if inline function is too large. */
-extern int warn_inline;
+extern bool warn_inline;
/* Nonzero to warn about variables used before they are initialized. */
extern int warn_uninitialized;
-/* Zero if unknown pragmas are ignored
- One if the compiler should warn about an unknown pragma not in
- a system include file.
- Greater than one if the compiler should warn for all unknown
- pragmas. */
+/* Nonzero means warn about all declarations which shadow others. */
+
+extern bool warn_shadow;
+
+/* Warn if a switch on an enum, that does not have a default case,
+ fails to have a case for every enum value. */
-extern int warn_unknown_pragmas;
+extern bool warn_switch;
-/* Nonzero means warn about all declarations which shadow others. */
+/* Warn if a switch does not have a default case. */
-extern int warn_shadow;
+extern bool warn_switch_default;
-/* Warn if a switch on an enum fails to have a case for every enum value. */
+/* Warn if a switch on an enum fails to have a case for every enum
+ value (regardless of the presence or otherwise of a default case). */
-extern int warn_switch;
+extern bool warn_switch_enum;
/* Nonzero means warn about function definitions that default the return type
or that use a null return and have a return-type other than void. */
extern int warn_return_type;
+/* Warn about functions which might be candidates for attribute noreturn. */
+
+extern bool warn_missing_noreturn;
+
/* Nonzero means warn about pointer casts that increase the required
alignment of the target type (and might therefore lead to a crash
due to a misaligned access). */
-extern int warn_cast_align;
-
-/* Nonzero means warn that dbx info for template class methods isn't fully
- supported yet. */
-
-extern int warn_template_debugging;
-
-/* Nonzero means warn about any identifiers that match in the first N
- characters. The value N is in `id_clash_len'. */
-
-extern int warn_id_clash;
-extern unsigned id_clash_len;
+extern bool warn_cast_align;
/* Nonzero means warn about any objects definitions whose size is larger
than N bytes. Also want about function definitions whose returned
values are larger than N bytes. The value N is in `larger_than_size'. */
-extern int warn_larger_than;
-extern unsigned larger_than_size;
+extern bool warn_larger_than;
+extern HOST_WIDE_INT larger_than_size;
/* Warn if a function returns an aggregate,
since there are often incompatible calling conventions for doing this. */
-extern int warn_aggregate_return;
+extern bool warn_aggregate_return;
+
+/* Warn if packed attribute on struct is unnecessary and inefficient. */
+
+extern bool warn_packed;
+
+/* Warn when gcc pads a structure to an alignment boundary. */
+
+extern bool warn_padded;
+
+/* Warn when an optimization pass is disabled. */
+
+extern bool warn_disabled_optimization;
+
+/* Nonzero means warn about uses of __attribute__((deprecated))
+ declarations. */
+
+extern bool warn_deprecated_decl;
+
+/* Nonzero means warn about constructs which might not be strict
+ aliasing safe. */
+
+extern bool warn_strict_aliasing;
/* Nonzero if generating code to do profiling. */
extern int profile_flag;
-/* Nonzero if generating code to do profiling on the basis of basic blocks. */
+/* Nonzero if generating code to profile program flow graph arcs. */
-extern int profile_block_flag;
+extern int profile_arc_flag;
-/* Nonzero if generating code to profile program flow graph arcs. */
+/* Nonzero if value profile should be measured. */
-extern int profile_arc_flag;
+extern int flag_profile_values;
-/* Nonzero if generating info for gcov to calculate line test coverage. */
+/* Nonzero if generating info for gcov to calculate line test coverage. */
extern int flag_test_coverage;
-/* Nonzero indicates that branch taken probabilities should be calculated. */
+/* Nonzero indicates that branch taken probabilities should be calculated. */
extern int flag_branch_probabilities;
+/* Nonzero if basic blocks should be reordered. */
+
+extern int flag_reorder_blocks;
+
+/* Nonzero if functions should be reordered. */
+
+extern int flag_reorder_functions;
+
+/* Nonzero if registers should be renamed. */
+
+extern int flag_rename_registers;
+
/* Nonzero for -pedantic switch: warn about anything
that standard C forbids. */
UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
unrolled. */
-extern int flag_unroll_loops;
+extern int flag_old_unroll_loops;
/* Nonzero enables loop unrolling in unroll.c. All loops are unrolled.
This is generally not a win. */
-extern int flag_unroll_all_loops;
+extern int flag_old_unroll_all_loops;
/* Nonzero forces all invariant computations in loops to be moved
- outside the loop. */
+ outside the loop. */
extern int flag_move_all_movables;
+/* Nonzero enables prefetch optimizations for arrays in loops. */
+
+extern int flag_prefetch_loop_arrays;
+
/* Nonzero forces all general induction variables in loops to be
- strength reduced. */
+ strength reduced. */
extern int flag_reduce_all_givs;
extern int flag_no_peephole;
-/* Nonzero means all references through pointers are volatile. */
+/* Nonzero allows GCC to optimize sibling and tail recursive calls. */
-extern int flag_volatile;
+extern int flag_optimize_sibling_calls;
-/* Nonzero means treat all global and extern variables as volatile. */
+/* Nonzero means the front end generally wants `errno' maintained by math
+ operations, like built-in SQRT. */
-extern int flag_volatile_global;
+extern int flag_errno_math;
-/* Nonzero means treat all static variables as volatile. */
+/* Nonzero means that unsafe floating-point math optimizations are allowed
+ for the sake of speed. IEEE compliance is not guaranteed, and operations
+ are allowed to assume that their arguments and results are "normal"
+ (e.g., nonnegative for SQRT). */
-extern int flag_volatile_static;
+extern int flag_unsafe_math_optimizations;
-/* Nonzero allows GCC to violate some IEEE or ANSI rules regarding math
- operations in the interest of optimization. For example it allows
- GCC to assume arguments to sqrt are nonnegative numbers, allowing
- faster code for sqrt to be generated. */
+/* Nonzero means that no NaNs or +-Infs are expected. */
-extern int flag_fast_math;
+extern int flag_finite_math_only;
-/* Nonzero means the front end generally wants `errno' maintained by math
- operations, like built-in SQRT, unless overridden by flag_fast_math. */
+/* Zero means that floating-point math operations cannot generate a
+ (user-visible) trap. This is the case, for example, in nonstop
+ IEEE 754 arithmetic. */
-extern int flag_errno_math;
+extern int flag_trapping_math;
+
+/* Nonzero means disable transformations that assume default floating
+ point rounding behavior. */
+
+extern int flag_rounding_math;
/* 0 means straightforward implementation of complex divide acceptable.
1 means wide ranges of inputs must work for complex divide.
- 2 means C9X-like requirements for complex divide (not yet implemented). */
+ 2 means C99-like requirements for complex divide (not yet implemented). */
extern int flag_complex_divide_method;
extern int flag_no_inline;
+/* Nonzero means that we don't want inlining by virtue of -fno-inline,
+ not just because the tree inliner turned us off. */
+
+extern int flag_really_no_inline;
+
/* Nonzero if we are only using compiler to check syntax errors. */
extern int flag_syntax_only;
extern int flag_schedule_insns;
extern int flag_schedule_insns_after_reload;
+extern int flag_sched2_use_superblocks;
+extern int flag_sched2_use_traces;
-#ifdef HAIFA
/* The following flags have effect only for scheduling before register
allocation:
- flag_schedule_interblock means schedule insns accross basic blocks.
+ flag_schedule_interblock means schedule insns across basic blocks.
flag_schedule_speculative means allow speculative motion of non-load insns.
flag_schedule_speculative_load means allow speculative motion of some
load insns.
extern int flag_schedule_speculative;
extern int flag_schedule_speculative_load;
extern int flag_schedule_speculative_load_dangerous;
-#endif /* HAIFA */
-/* flag_on_branch_count_reg means try to replace add-1,compare,branch tupple
- by a cheaper branch, on a count register. */
+/* The following flags have an effect during scheduling after register
+ allocation:
+
+ sched_stalled_insns means that insns can be moved prematurely from the queue
+ of stalled insns into the ready list.
+
+ sched_stalled_insns_dep controls how many recently scheduled cycles will
+ be examined for a dependency on a stalled insn that is candidate for
+ premature removal from the queue of stalled insns into the ready list (has
+ an effect only if the flag 'sched_stalled_insns' is set). */
+
+extern int flag_sched_stalled_insns;
+extern int flag_sched_stalled_insns_dep;
+
+/* flag_branch_on_count_reg means try to replace add-1,compare,branch tupple
+ by a cheaper branch, on a count register. */
extern int flag_branch_on_count_reg;
+/* This option is set to 1 on -fsingle-precision-constant option which is
+ used to convert the floating point constants to single precision
+ constants. */
+
+extern int flag_single_precision_constant;
-/* Nonzero means put things in delayed-branch slots if supported. */
+/* Nonzero means put things in delayed-branch slots if supported. */
extern int flag_delayed_branch;
extern int flag_dump_unnumbered;
-/* Nonzero means pretend it is OK to examine bits of target floats,
- even if that isn't true. The resulting code will have incorrect constants,
- but the same series of instructions that the native compiler would make. */
-
-extern int flag_pretend_float;
-
/* Nonzero means change certain warnings into errors.
Usually these are warnings about failure to conform to some standard. */
extern int flag_pedantic_errors;
-/* Nonzero means generate position-independent code.
- This is not fully implemented yet. */
+/* Nonzero means generate position-independent code. 1 vs 2 for a
+ target-dependent "small" or "large" mode. */
extern int flag_pic;
+/* Nonzero if we are compiling position independent code for executable.
+ 1 vs 2 for a target-dependent "small" or "large" mode. */
+
+extern int flag_pie;
+
+/* Nonzero if we are compiling code for a shared library, zero for
+ executable. */
+
+extern int flag_shlib;
+
/* Nonzero means generate extra code for exception handling and enable
exception handling. */
extern int flag_exceptions;
-/* Nonzero means use the new model for exception handling. Replaces
- -DNEW_EH_MODEL as a compile option. */
+/* Nonzero means generate frame unwind info table when supported. */
-extern int flag_new_exceptions;
+extern int flag_unwind_tables;
+
+/* Nonzero means generate frame unwind info table exact at each insn boundary. */
+
+extern int flag_asynchronous_unwind_tables;
/* Nonzero means don't place uninitialized global data in common storage
by default. */
extern int flag_debug_asm;
-/* -fgnu-linker specifies use of the GNU linker for initializations.
- -fno-gnu-linker says that collect will be used. */
-extern int flag_gnu_linker;
+extern int flag_dump_rtl_in_asm;
+
+/* Greater than zero if user symbols are prepended by a leading underscore
+ in generated assembly code. */
+extern int flag_leading_underscore;
/* Tag all structures with __attribute__(packed) */
extern int flag_pack_struct;
if alias analysis (in general) is enabled. */
extern int flag_strict_aliasing;
-/* Emit code to check for stack overflow; also may cause large objects
- to be allocated dynamically. */
+/* Emit code to probe the stack, to help detect stack overflow; also
+ may cause large objects to be allocated dynamically. */
extern int flag_stack_check;
/* Do the full regmove optimization pass. */
/* Instrument functions with calls at entry and exit, for profiling. */
extern int flag_instrument_function_entry_exit;
+
+/* Perform a peephole pass before sched2. */
+extern int flag_peephole2;
+
+/* Try to guess branch probabilities. */
+extern int flag_guess_branch_prob;
+
+/* -fcheck-bounds causes gcc to generate array bounds checks.
+ For C, C++ and ObjC: defaults off.
+ For Java: defaults to on.
+ For Fortran: defaults to off. */
+extern int flag_bounds_check;
+
+/* This will attempt to merge constant section constants, if 1 only
+ string constants and constants from constant pool, if 2 also constant
+ variables. */
+extern int flag_merge_constants;
+
+/* If one, renumber instruction UIDs to reduce the number of
+ unused UIDs if there are a lot of instructions. If greater than
+ one, unconditionally renumber instruction UIDs. */
+extern int flag_renumber_insns;
\f
/* Other basic status info about current function. */
extern int frame_pointer_needed;
-/* Set nonzero if jump_optimize finds that control falls through
- at the end of the function. */
-
-extern int can_reach_end;
+/* Nonzero if the generated code should trap on signed overflow
+ for PLUS / SUB / MULT. */
+extern int flag_trapv;
-/* Nonzero if GCC must add code to check memory access (used by Checker). */
+/* Nonzero if the signed arithmetic overflow should wrap around. */
+extern int flag_wrapv;
-extern int flag_check_memory_usage;
-
-/* Nonzero if GCC must prefix function names (used with
- flag_check_memory_usage). */
-
-extern int flag_prefix_function_name;
+/* Nonzero if subexpressions must be evaluated from left-to-right. */
+extern int flag_evaluation_order;
/* Value of the -G xx switch, and whether it was passed or not. */
-extern int g_switch_value;
-extern int g_switch_set;
-
-/* Value of the -finline-limit flag. */
-
-extern int inline_max_insns;
+extern unsigned HOST_WIDE_INT g_switch_value;
+extern bool g_switch_set;
+
+/* Values of the -falign-* flags: how much to align labels in code.
+ 0 means `use default', 1 means `don't align'.
+ For each variable, there is an _log variant which is the power
+ of two not less than the variable, for .align output. */
+
+extern int align_loops;
+extern int align_loops_log;
+extern int align_loops_max_skip;
+extern int align_jumps;
+extern int align_jumps_log;
+extern int align_jumps_max_skip;
+extern int align_labels;
+extern int align_labels_log;
+extern int align_labels_max_skip;
+extern int align_functions;
+extern int align_functions_log;
+
+/* Like align_functions_log above, but used by front-ends to force the
+ minimum function alignment. Zero means no alignment is forced. */
+extern int force_align_functions_log;
/* Nonzero if we dump in VCG format, not plain text. */
extern int dump_for_graph;
string identifying the compiler. */
extern int flag_no_ident;
+
+/* Nonzero means perform global CSE. */
+
+extern int flag_gcse;
+
+/* Nonzero if we want to perform enhanced load motion during gcse. */
+
+extern int flag_gcse_lm;
+
+/* Nonzero if we want to perform store motion after gcse. */
+
+extern int flag_gcse_sm;
+
+/* Nonzero if we want to perform redundant load-after-store elimination
+ in gcse. */
+
+extern int flag_gcse_las;
+
+/* Nonzero if value histograms should be used to optimize code. */
+extern int flag_value_profile_transformations;
+
+/* Perform branch target register optimization before prologue / epilogue
+ threading. */
+
+extern int flag_branch_target_load_optimize;
+
+/* Perform branch target register optimization after prologue / epilogue
+ threading and jump2. */
+
+extern int flag_branch_target_load_optimize2;
+
+/* For the bt-load pass, nonzero means don't re-use branch target registers
+ in any basic block. */
+extern int flag_btr_bb_exclusive;
+
+
+/* Nonzero means we should do dwarf2 duplicate elimination. */
+
+extern int flag_eliminate_dwarf2_dups;
+
+/* Nonzero means we should do unused type elimination. */
+
+extern int flag_eliminate_unused_debug_types;
+
+/* Nonzero means to collect statistics which might be expensive
+ and to print them when we are done. */
+extern int flag_detailed_statistics;
+
+/* Nonzero means enable synchronous exceptions for non-call instructions. */
+extern int flag_non_call_exceptions;
+
+/* Nonzero means put zero initialized data in the bss section. */
+extern int flag_zero_initialized_in_bss;
+
+/* Nonzero means disable transformations observable by signaling NaNs. */
+extern int flag_signaling_nans;
+
+extern int flag_unit_at_a_time;
+
+extern int flag_web;
+
+/* Nonzero means that we defer emitting functions until they are actually
+ used. */
+extern int flag_remove_unreachable_functions;
+
+/* A string that's used when a random name is required. NULL means
+ to make it really random. */
+
+extern const char *flag_random_seed;
+
+/* True if the given mode has a NaN representation and the treatment of
+ NaN operands is important. Certain optimizations, such as folding
+ x * 0 into x, are not correct for NaN operands, and are normally
+ disabled for modes with NaNs. The user can ask for them to be
+ done anyway using the -funsafe-math-optimizations switch. */
+#define HONOR_NANS(MODE) \
+ (MODE_HAS_NANS (MODE) && !flag_finite_math_only)
+
+/* Like HONOR_NANs, but true if we honor signaling NaNs (or sNaNs). */
+#define HONOR_SNANS(MODE) (flag_signaling_nans && HONOR_NANS (MODE))
+
+/* As for HONOR_NANS, but true if the mode can represent infinity and
+ the treatment of infinite values is important. */
+#define HONOR_INFINITIES(MODE) \
+ (MODE_HAS_INFINITIES (MODE) && !flag_finite_math_only)
+
+/* Like HONOR_NANS, but true if the given mode distinguishes between
+ positive and negative zero, and the sign of zero is important. */
+#define HONOR_SIGNED_ZEROS(MODE) \
+ (MODE_HAS_SIGNED_ZEROS (MODE) && !flag_unsafe_math_optimizations)
+
+/* Like HONOR_NANS, but true if given mode supports sign-dependent rounding,
+ and the rounding mode is important. */
+#define HONOR_SIGN_DEPENDENT_ROUNDING(MODE) \
+ (MODE_HAS_SIGN_DEPENDENT_ROUNDING (MODE) && flag_rounding_math)
+
+#endif /* ! GCC_FLAGS_H */
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