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, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, 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"
+#include "real.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;
extern bool extra_warnings;
-/* Nonzero to warn about unused variables, functions et.al. Use
- set_Wunused() to update the -Wunused-* flags that correspond to the
- -Wunused option. */
+/* 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 void set_Wunused (int setting);
+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. */
+/* Nonzero means warn about any function whose frame size is larger
+ than N bytes. */
-extern int warn_strict_aliasing;
-
-/* Temporarily suppress certain warnings.
- This is set while reading code from a system header file. */
-
-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. */
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. */
-
-extern int flag_really_no_inline;
-
/* Nonzero if we are only using compiler to check syntax errors. */
extern int rtl_dump_and_exit;
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_next_runtime;
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. */
+/* 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 int frame_pointer_needed;
+extern unsigned int flag_ira_verbose;
+
+\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;
+/* Same for selective scheduling. */
+extern bool sel_sched_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
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;
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))
+/* Return whether the function should be excluded from
+ instrumentation. */
+extern bool flag_instrument_functions_exclude_p (tree fndecl);
+
+/* Emit warning if the function call is disallowed under
+ -Wdisallowed-function-list=... */
+extern void warn_if_disallowed_function_p (const_tree fncall);
+
+/* True, if the -Wdisallowed-function-list=... option has been specified. */
+extern bool warn_disallowed_functions;
+
/* 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 0, are not correct for NaN operands, and are normally
(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. */
+ 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)
#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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