/* Compilation switch flag definitions for GCC.
Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002,
- 2003, 2004
+ 2003, 2004, 2005, 2006, 2007
Free Software Foundation, Inc.
This file is part of GCC.
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
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-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. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#ifndef GCC_FLAGS_H
#define GCC_FLAGS_H
+#include "coretypes.h"
+#include "options.h"
+
enum debug_info_type
{
NO_DEBUG, /* Write no debug info. */
DBX_DEBUG, /* Write BSD .stabs for DBX (using dbxout.c). */
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). */
VMS_DEBUG, /* Write VMS debug info (using vmsdbgout.c). */
/* Specify how much debugging info to generate. */
extern enum debug_info_level debug_info_level;
+/* A major contribution to object and executable size is debug
+ information size. A major contribution to debug information
+ size is struct descriptions replicated in several object files.
+ The following function determines whether or not debug information
+ should be generated for a given struct. The indirect parameter
+ indicates that the struct is being handled indirectly, via
+ a pointer. See opts.c for the implementation. */
+
+enum debug_info_usage
+{
+ DINFO_USAGE_DFN, /* A struct definition. */
+ DINFO_USAGE_DIR_USE, /* A direct use, such as the type of a variable. */
+ DINFO_USAGE_IND_USE, /* An indirect use, such as through a pointer. */
+ DINFO_USAGE_NUM_ENUMS /* The number of enumerators. */
+};
+
+extern bool should_emit_struct_debug (tree type_decl, enum debug_info_usage);
+extern void set_struct_debug_option (const char *value);
+
/* Nonzero means use GNU-only extensions in the generated symbolic
debugging information. */
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;
+/* Enumerate visibility settings. This is deliberately ordered from most
+ to least visibility. */
+#ifndef SYMBOL_VISIBILITY_DEFINED
+#define SYMBOL_VISIBILITY_DEFINED
+enum symbol_visibility
+{
+ VISIBILITY_DEFAULT,
+ VISIBILITY_PROTECTED,
+ VISIBILITY_HIDDEN,
+ VISIBILITY_INTERNAL
+};
+#endif
+
+/* The default visibility for all symbols (unless overridden). */
+extern enum symbol_visibility default_visibility;
+
+struct visibility_flags
+{
+ unsigned inpragma : 1; /* True when in #pragma GCC visibility. */
+ unsigned inlines_hidden : 1; /* True when -finlineshidden in effect. */
+};
+
+/* Global visibility options. */
+extern struct visibility_flags visibility_options;
/* Nonzero means do optimizations. -opt. */
extern int optimize_size;
-/* 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 bool inhibit_warnings;
-
-/* Don't suppress warnings from system headers. -Wsystem-headers. */
-
-extern bool warn_system_headers;
-
/* Do print extra warnings (such as for uninitialized variables).
-W/-Wextra. */
extern bool extra_warnings;
-/* 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 bool warn_notreached;
-
-/* Nonzero means warn if inline function is too large. */
+/* Used to set the level of -Wstrict-aliasing, when no level is specified.
+ The external way to set the default level is to use
+ -Wstrict-aliasing=level.
+ ONOFF is assumed to take value 1 when -Wstrict-aliasing is specified,
+ and 0 otherwise. After calling this function, wstrict_aliasing will be
+ set to the default value of -Wstrict_aliasing=level. */
-extern bool warn_inline;
-
-/* Nonzero to warn about variables used before they are initialized. */
-
-extern int warn_uninitialized;
-
-/* 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 bool warn_switch;
-
-/* Warn if a switch does not have a default case. */
-
-extern bool warn_switch_default;
-
-/* 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 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 bool warn_cast_align;
+extern void set_Wstrict_aliasing (int onoff);
/* Nonzero means warn about any objects definitions whose size is larger
than N bytes. Also want about function definitions whose returned
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 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. */
+/* Nonzero means warn about any function whose frame size is larger
+ than N bytes. */
-extern bool warn_strict_aliasing;
-
-/* Nonzero if generating code to do profiling. */
-
-extern int profile_flag;
-
-/* Nonzero if generating code to profile program flow graph arcs. */
-
-extern int profile_arc_flag;
-
-/* Nonzero if value profile should be measured. */
-
-extern int flag_profile_values;
-
-/* 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. */
-
-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. */
-
-extern int pedantic;
+extern bool warn_frame_larger_than;
+extern HOST_WIDE_INT frame_larger_than_size;
/* Temporarily suppress certain warnings.
This is set while reading code from a system header file. */
extern int flag_signed_char;
-/* Nonzero means give an enum type only as many bytes as it needs. */
+/* Nonzero means give an enum type only as many bytes as it needs. A value
+ of 2 means it has not yet been initialized. */
extern int flag_short_enums;
-/* Nonzero for -fcaller-saves: allocate values in regs that need to
- be saved across function calls, if that produces overall better code.
- Optional now, so people can test it. */
-
-extern int flag_caller_saves;
-
/* Nonzero for -fpcc-struct-return: return values the same way PCC does. */
extern int flag_pcc_struct_return;
-/* Nonzero for -fforce-mem: load memory value into a register
- before arithmetic on it. This makes better cse but slower compilation. */
-
-extern int flag_force_mem;
-
-/* Nonzero for -fforce-addr: load memory address into a register before
- reference to memory. This makes better cse but slower compilation. */
-
-extern int flag_force_addr;
-
-/* Nonzero for -fdefer-pop: don't pop args after each function call;
- instead save them up to pop many calls' args with one insns. */
-
-extern int flag_defer_pop;
-
-/* Nonzero for -ffloat-store: don't allocate floats and doubles
- in extended-precision registers. */
-
-extern int flag_float_store;
-
-/* Nonzero enables strength-reduction in loop.c. */
-
-extern int flag_strength_reduce;
-
-/* Nonzero enables loop unrolling in unroll.c. Only loops for which the
- number of iterations can be calculated at compile-time (UNROLL_COMPLETELY,
- UNROLL_MODULO) or at run-time (preconditioned to be UNROLL_MODULO) are
- unrolled. */
-
-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_old_unroll_all_loops;
-
-/* Nonzero forces all invariant computations in loops to be moved
- 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. */
-
-extern int flag_reduce_all_givs;
-
-/* Nonzero for -fcse-follow-jumps:
- have cse follow jumps to do a more extensive job. */
-
-extern int flag_cse_follow_jumps;
-
-/* Nonzero for -fcse-skip-blocks:
- have cse follow a branch around a block. */
-
-extern int flag_cse_skip_blocks;
-
-/* Nonzero for -fexpensive-optimizations:
- perform miscellaneous relatively-expensive optimizations. */
-extern int flag_expensive_optimizations;
-
-/* Nonzero for -fwritable-strings:
- store string constants in data segment and don't uniquize them. */
-
-extern int flag_writable_strings;
-
-/* Nonzero means don't put addresses of constant functions in registers.
- Used for compiling the Unix kernel, where strange substitutions are
- done on the assembly output. */
-
-extern int flag_no_function_cse;
-
-/* Nonzero for -fomit-frame-pointer:
- don't make a frame pointer in simple functions that don't require one. */
-
-extern int flag_omit_frame_pointer;
-
-/* Nonzero to inhibit use of define_optimization peephole opts. */
-
-extern int flag_no_peephole;
-
-/* Nonzero allows GCC to optimize sibling and tail recursive calls. */
-
-extern int flag_optimize_sibling_calls;
-
-/* Nonzero means the front end generally wants `errno' maintained by math
- operations, like built-in SQRT. */
-
-extern int flag_errno_math;
-
-/* 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_unsafe_math_optimizations;
-
-/* Nonzero means that no NaNs or +-Infs are expected. */
-
-extern int flag_finite_math_only;
-
-/* 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_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 C99-like requirements for complex divide (not yet implemented). */
-
-extern int flag_complex_divide_method;
-
-/* Nonzero means to run loop optimizations twice. */
-
-extern int flag_rerun_loop_opt;
-
-/* Nonzero means make functions that look like good inline candidates
- go inline. */
-
-extern int flag_inline_functions;
-
-/* Nonzero for -fkeep-inline-functions: even if we make a function
- go inline everywhere, keep its definition around for debugging
- purposes. */
+ 2 means C99-like requirements for complex multiply and divide. */
-extern int flag_keep_inline_functions;
-
-/* Nonzero means that functions declared `inline' will be treated
- as `static'. Prevents generation of zillions of copies of unused
- static inline functions; instead, `inlines' are written out
- only when actually used. Used in conjunction with -g. Also
- does the right thing with #pragma interface. */
-
-extern int flag_no_inline;
+extern int flag_complex_method;
/* Nonzero means that we don't want inlining by virtue of -fno-inline,
not just because the tree inliner turned us off. */
/* Nonzero if we are only using compiler to check syntax errors. */
-extern int flag_syntax_only;
+extern int rtl_dump_and_exit;
/* Nonzero means we should save auxiliary info into a .X file. */
extern int flag_gen_aux_info;
-/* Nonzero means make the text shared if supported. */
-
-extern int flag_shared_data;
-
-/* flag_schedule_insns means schedule insns within basic blocks (before
- local_alloc).
- flag_schedule_insns_after_reload means schedule insns after
- global_alloc. */
-
-extern int flag_schedule_insns;
-extern int flag_schedule_insns_after_reload;
-extern int flag_sched2_use_superblocks;
-extern int flag_sched2_use_traces;
-
-/* The following flags have effect only for scheduling before register
- allocation:
-
- 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.
- flag_schedule_speculative_load_dangerous allows speculative motion of more
- load insns. */
-
-extern int flag_schedule_interblock;
-extern int flag_schedule_speculative;
-extern int flag_schedule_speculative_load;
-extern int flag_schedule_speculative_load_dangerous;
-
-/* 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. */
-
-extern int flag_delayed_branch;
-
/* Nonzero means suppress output of instruction numbers and line number
notes in debugging dumps. */
extern int flag_pedantic_errors;
-/* Nonzero means generate position-independent code. 1 vs 2 for a
- target-dependent "small" or "large" mode. */
+/* Nonzero means make permerror produce warnings instead of errors. */
-extern int flag_pic;
+extern int flag_permissive;
-/* 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 generate frame unwind info table when supported. */
-
-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_no_common;
-
-/* -finhibit-size-directive inhibits output of .size for ELF.
- This is used only for compiling crtstuff.c,
- and it may be extended to other effects
- needed for crtstuff.c on other systems. */
-extern int flag_inhibit_size_directive;
-
-/* Nonzero means place each function into its own section on those platforms
- which support arbitrary section names and unlimited numbers of sections. */
-
-extern int flag_function_sections;
-
-/* ... and similar for data. */
-
-extern int flag_data_sections;
-
-/* -fverbose-asm causes extra commentary information to be produced in
- the generated assembly code (to make it more readable). This option
- is generally only of use to those who actually need to read the
- generated assembly code (perhaps while debugging the compiler itself).
- -fno-verbose-asm, the default, causes the extra information
- to not be added and is useful when comparing two assembler files. */
-
-extern int flag_verbose_asm;
-
/* -dA causes debug information to be produced in
the generated assembly code (to make it more readable). This option
is generally only of use to those who actually need to read the
extern int flag_debug_asm;
-extern int flag_dump_rtl_in_asm;
+/* Generate code for GNU or NeXT Objective-C runtime environment. */
+
+extern int flag_next_runtime;
-/* 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;
-
-/* This flag is only tested if alias checking is enabled.
- 0 if pointer arguments may alias each other. True in C.
- 1 if pointer arguments may not alias each other but may alias
- global variables.
- 2 if pointer arguments may not alias each other and may not
- alias global variables. True in Fortran.
- The value is ignored if flag_alias_check is 0. */
-extern int flag_argument_noalias;
-
-/* Nonzero if we should do (language-dependent) alias analysis.
- Typically, this analysis will assume that expressions of certain
- types do not alias expressions of certain other types. Only used
- if alias analysis (in general) is enabled. */
-extern int flag_strict_aliasing;
-
-/* 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. */
-extern int flag_regmove;
-
-/* 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;
+extern int flag_dump_rtl_in_asm;
\f
/* Other basic status info about current function. */
-/* Nonzero means current function must be given a frame pointer.
- Set in stmt.c if anything is allocated on the stack there.
- Set in reload1.c if anything is allocated on the stack there. */
-
-extern int frame_pointer_needed;
-
-/* Nonzero if the generated code should trap on signed overflow
- for PLUS / SUB / MULT. */
-extern int flag_trapv;
-
-/* Nonzero if the signed arithmetic overflow should wrap around. */
-extern int flag_wrapv;
-
/* Nonzero if subexpressions must be evaluated from left-to-right. */
extern int flag_evaluation_order;
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;
};
extern enum graph_dump_types graph_dump_format;
-/* Nonzero means ignore `#ident' directives. 0 means handle them.
- On SVR4 targets, it also controls whether or not to emit a
- 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. */
+/* Nonzero if we should track variables. */
+extern int flag_var_tracking;
+
+/* True if flag_speculative_prefetching was set by user. Used to suppress
+ warning message in case flag was set by -fprofile-{generate,use}. */
+extern bool flag_speculative_prefetching_set;
-extern const char *flag_random_seed;
+/* Returns TRUE if generated code should match ABI version N or
+ greater is in use. */
+
+#define abi_version_at_least(N) \
+ (flag_abi_version == 0 || flag_abi_version >= (N))
+
+/* Return whether the function should be excluded from
+ instrumentation. */
+extern bool flag_instrument_functions_exclude_p (tree fndecl);
/* 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
+ x * 0 into 0, 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) \
/* 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)
+ (MODE_HAS_SIGNED_ZEROS (MODE) && flag_signed_zeros)
/* 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)
+/* True if overflow wraps around for the given integral type. That
+ is, TYPE_MAX + 1 == TYPE_MIN. */
+#define TYPE_OVERFLOW_WRAPS(TYPE) \
+ (TYPE_UNSIGNED (TYPE) || flag_wrapv)
+
+/* True if overflow is undefined for the given integral type. We may
+ optimize on the assumption that values in the type never overflow.
+
+ IMPORTANT NOTE: Any optimization based on TYPE_OVERFLOW_UNDEFINED
+ must issue a warning based on warn_strict_overflow. In some cases
+ it will be appropriate to issue the warning immediately, and in
+ other cases it will be appropriate to simply set a flag and let the
+ caller decide whether a warning is appropriate or not. */
+#define TYPE_OVERFLOW_UNDEFINED(TYPE) \
+ (!TYPE_UNSIGNED (TYPE) && !flag_wrapv && !flag_trapv && flag_strict_overflow)
+
+/* True if overflow for the given integral type should issue a
+ trap. */
+#define TYPE_OVERFLOW_TRAPS(TYPE) \
+ (!TYPE_UNSIGNED (TYPE) && flag_trapv)
+
+/* True if pointer types have undefined overflow. */
+#define POINTER_TYPE_OVERFLOW_UNDEFINED (flag_strict_overflow)
+
+/* Names for the different levels of -Wstrict-overflow=N. The numeric
+ values here correspond to N. */
+
+enum warn_strict_overflow_code
+{
+ /* Overflow warning that should be issued with -Wall: a questionable
+ construct that is easy to avoid even when using macros. Example:
+ folding (x + CONSTANT > x) to 1. */
+ WARN_STRICT_OVERFLOW_ALL = 1,
+ /* Overflow warning about folding a comparison to a constant because
+ of undefined signed overflow, other than cases covered by
+ WARN_STRICT_OVERFLOW_ALL. Example: folding (abs (x) >= 0) to 1
+ (this is false when x == INT_MIN). */
+ WARN_STRICT_OVERFLOW_CONDITIONAL = 2,
+ /* Overflow warning about changes to comparisons other than folding
+ them to a constant. Example: folding (x + 1 > 1) to (x > 0). */
+ WARN_STRICT_OVERFLOW_COMPARISON = 3,
+ /* Overflow warnings not covered by the above cases. Example:
+ folding ((x * 10) / 5) to (x * 2). */
+ WARN_STRICT_OVERFLOW_MISC = 4,
+ /* Overflow warnings about reducing magnitude of constants in
+ comparison. Example: folding (x + 2 > y) to (x + 1 >= y). */
+ WARN_STRICT_OVERFLOW_MAGNITUDE = 5
+};
+
+/* Whether to emit an overflow warning whose code is C. */
+#define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c))
+
#endif /* ! GCC_FLAGS_H */
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