gcc/alias.h

   1 /* Exported functions from alias.c
   2    Copyright (C) 2004, 2007 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GCC_ALIAS_H
  21 #define GCC_ALIAS_H
  22
  23 /* The type of an alias set.  */
  24 typedef HOST_WIDE_INT alias_set_type;
  25
  26 extern alias_set_type new_alias_set (void);
  27 extern alias_set_type get_varargs_alias_set (void);
  28 extern alias_set_type get_frame_alias_set (void);
  29 extern bool component_uses_parent_alias_set (const_tree);
  30 extern bool alias_set_subset_of (alias_set_type, alias_set_type);
  31
  32 /* This alias set can be used to force a memory to conflict with all
  33    other memories, creating a barrier across which no memory reference
  34    can move.  Note that there are other legacy ways to create such
  35    memory barriers, including an address of SCRATCH.  */
  36 #define ALIAS_SET_MEMORY_BARRIER        ((alias_set_type) -1)
  37
  38 #endif /* GCC_ALIAS_H */