gcc/gcc/flags.h

/* Compilation switch flag definitions for GCC.
   Copyright (C) 1987, 1988, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2002,
   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 3, or (at your option) any later
version.

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 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 "flag-types.h"
#include "options.h"

#if !defined(IN_LIBGCC2) && !defined(IN_TARGET_LIBS) && !defined(IN_RTS)

/* Names of debug_info_type, for error messages.  */
extern const char *const debug_type_names[];

extern void strip_off_ending (char *, int);
extern int base_of_path (const char *path, const char **base_out);

/* 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 in_lto_p;

/* Return true iff flags are set as if -ffast-math.  */
extern bool fast_math_flags_set_p (const struct gcc_options *);
extern bool fast_math_flags_struct_set_p (struct cl_optimization *);

/* Used to set the level of -Wstrict-aliasing in OPTS, 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_Wstrict_aliasing (struct gcc_options *opts, int onoff);

/* Now the symbols that are set with `-f' switches.  */

/* True if printing into -fdump-final-insns= dump.  */

extern bool final_insns_dump_p;

/* Nonzero means make permerror produce warnings instead of errors.  */

extern int flag_permissive;

/* Generate code for GNU or NeXT Objective-C runtime environment.  */

extern int flag_next_runtime;

/* Other basic status info about current function.  */

/* Target-dependent global state.  */
struct target_flag_state {
  /* 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.  */
  int x_align_loops_log;
  int x_align_loops_max_skip;
  int x_align_jumps_log;
  int x_align_jumps_max_skip;
  int x_align_labels_log;
  int x_align_labels_max_skip;
  int x_align_functions_log;

  /* The excess precision currently in effect.  */
  enum excess_precision x_flag_excess_precision;
};

extern struct target_flag_state default_target_flag_state;
#if SWITCHABLE_TARGET
extern struct target_flag_state *this_target_flag_state;
#else
#define this_target_flag_state (&default_target_flag_state)
#endif

#define align_loops_log \
  (this_target_flag_state->x_align_loops_log)
#define align_loops_max_skip \
  (this_target_flag_state->x_align_loops_max_skip)
#define align_jumps_log \
  (this_target_flag_state->x_align_jumps_log)
#define align_jumps_max_skip \
  (this_target_flag_state->x_align_jumps_max_skip)
#define align_labels_log \
  (this_target_flag_state->x_align_labels_log)
#define align_labels_max_skip \
  (this_target_flag_state->x_align_labels_max_skip)
#define align_functions_log \
  (this_target_flag_state->x_align_functions_log)
#define flag_excess_precision \
  (this_target_flag_state->x_flag_excess_precision)

/* Nonzero if we dump in VCG format, not plain text.  */
extern int dump_for_graph;

/* 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 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)

/* Whether to emit an overflow warning whose code is C.  */
#define issue_strict_overflow_warning(c) (warn_strict_overflow >= (int) (c))

#endif

#endif /* ! GCC_FLAGS_H */