/* 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, 2008, 2009, 2010
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
/* 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;
-/* Enumerate visibility settings. */
+/* 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_INTERNAL,
+ VISIBILITY_PROTECTED,
VISIBILITY_HIDDEN,
- VISIBILITY_PROTECTED
+ VISIBILITY_INTERNAL
};
#endif
extern int optimize_size;
-/* Do print extra warnings (such as for uninitialized variables).
- -W/-Wextra. */
+/* True if this is the LTO front end (lto1). This is used to disable
+ gimple generation and lowering passes that are normally run on the
+ output of a front end. These passes must be bypassed for lto since
+ they have already been done before the gimple was written. */
-extern bool extra_warnings;
+extern bool in_lto_p;
-/* Nonzero to warn about unused variables, functions et.al. Use
- set_Wunused() to update the -Wunused-* flags that correspond to the
- -Wunused option. */
+/* Nonzero if we should write GIMPLE bytecode for link-time optimization. */
-extern void set_Wunused (int setting);
+extern int flag_generate_lto;
-/* 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. */
+/* 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 int warn_return_type;
+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;
-/* Nonzero means warn about constructs which might not be strict
- aliasing safe. */
-
-extern int warn_strict_aliasing;
-
-/* Temporarily suppress certain warnings.
- This is set while reading code from a system header file. */
+/* Nonzero means warn about any function whose frame size is larger
+ than N bytes. */
-extern int in_system_header;
+extern bool warn_frame_larger_than;
+extern HOST_WIDE_INT frame_larger_than_size;
/* Nonzero for -dp: annotate the assembly with a comment describing the
pattern and alternative used. */
/* 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). */
+ 2 means C99-like requirements for complex multiply and divide. */
-extern int flag_complex_divide_method;
-
-/* 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;
+extern int flag_complex_method;
/* Nonzero if we are only using compiler to check syntax errors. */
extern int flag_dump_unnumbered;
+/* True if printing into -fdump-final-insns= dump. */
+
+extern bool final_insns_dump_p;
+
/* 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 make permerror produce warnings instead of errors. */
+
+extern int flag_permissive;
+
/* Nonzero if we are compiling code for a shared library, zero for
executable. */
extern int flag_debug_asm;
+/* Generate code for GNU or NeXT Objective-C runtime environment. */
+
+extern int flag_next_runtime;
+
extern int flag_dump_rtl_in_asm;
-/* 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. */
+/* The algorithm used for the integrated register allocator (IRA). */
+enum ira_algorithm
+{
+ IRA_ALGORITHM_CB,
+ IRA_ALGORITHM_PRIORITY
+};
+
+extern enum ira_algorithm flag_ira_algorithm;
+
+/* The regions used for the integrated register allocator (IRA). */
+enum ira_region
+{
+ IRA_REGION_ONE,
+ IRA_REGION_ALL,
+ IRA_REGION_MIXED
+};
+
+extern enum ira_region flag_ira_region;
+
+extern unsigned int flag_ira_verbose;
-/* 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. */
+/* The options for excess precision. */
+enum excess_precision
+{
+ EXCESS_PRECISION_DEFAULT,
+ EXCESS_PRECISION_FAST,
+ EXCESS_PRECISION_STANDARD
+};
-extern int frame_pointer_needed;
+/* The excess precision specified on the command line, or defaulted by
+ the front end. */
+extern enum excess_precision flag_excess_precision_cmdline;
+
+/* The excess precision currently in effect. */
+extern enum excess_precision flag_excess_precision;
+
+\f
+/* Other basic status info about current function. */
/* Nonzero if subexpressions must be evaluated from left-to-right. */
extern int flag_evaluation_order;
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'.
+/* Same for selective scheduling. */
+extern bool sel_sched_switch_set;
+
+/* Whether to run the warn_unused_result attribute pass. */
+extern bool flag_warn_unused_result;
+
+/* 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_labels_max_skip;
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;
and to print them when we are done. */
extern int flag_detailed_statistics;
-/* Enable points-to analysis on trees. */
-enum pta_type
- {
- PTA_NONE,
- PTA_ANDERSEN
- };
-extern enum pta_type flag_tree_points_to;
-
-extern int flag_web;
-
/* Nonzero means that we defer emitting functions until they are actually
used. */
extern int flag_remove_unreachable_functions;
warning message in case flag was set by -fprofile-{generate,use}. */
extern bool flag_speculative_prefetching_set;
-/* A string that's used when a random name is required. NULL means
- to make it really random. */
+/* Type of stack check. */
+enum stack_check_type
+{
+ /* Do not check the stack. */
+ NO_STACK_CHECK = 0,
+
+ /* Check the stack generically, i.e. assume no specific support
+ from the target configuration files. */
+ GENERIC_STACK_CHECK,
-extern const char *flag_random_seed;
+ /* Check the stack and rely on the target configuration files to
+ check the static frame of functions, i.e. use the generic
+ mechanism only for dynamic stack allocations. */
+ STATIC_BUILTIN_STACK_CHECK,
+
+ /* Check the stack and entirely rely on the target configuration
+ files, i.e. do not use the generic mechanism at all. */
+ FULL_BUILTIN_STACK_CHECK
+};
+extern enum stack_check_type flag_stack_check;
/* 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))
-/* 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)
+/* Return whether the function should be excluded from
+ instrumentation. */
+extern bool flag_instrument_functions_exclude_p (tree fndecl);
+
+/* 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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