gcc/tree-ssa-threadupdate.h

   1 /* Communication between registering jump thread requests and
   2    updating the SSA/CFG for jump threading.
   3    Copyright (C) 2013-2014 Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 3, or (at your option)
  10 any later version.
  11
  12 GCC is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 #ifndef _TREE_SSA_THREADUPDATE_H
  22 #define _TREE_SSA_THREADUPDATE_H 1
  23
  24 /* In tree-ssa-threadupdate.c.  */
  25 extern bool thread_through_all_blocks (bool);
  26 enum jump_thread_edge_type
  27 {
  28   EDGE_START_JUMP_THREAD,
  29   EDGE_COPY_SRC_BLOCK,
  30   EDGE_COPY_SRC_JOINER_BLOCK,
  31   EDGE_NO_COPY_SRC_BLOCK
  32 };
  33
  34 class jump_thread_edge
  35 {
  36 public:
  37   jump_thread_edge (edge e, enum jump_thread_edge_type type)
  38     : e (e), type (type) {}
  39
  40   edge e;
  41   enum jump_thread_edge_type type;
  42 };
  43
  44 extern void register_jump_thread (vec <class jump_thread_edge *> *);
  45 extern void delete_jump_thread_path (vec <class jump_thread_edge *> *);
  46 #endif