gcc/cfglayout.h

   1 /* Basic block reordering routines for the GNU compiler.
   2    Copyright (C) 2000 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
   7    under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 2, or (at your option)
   9    any later version.
  10
  11    GCC is distributed in the hope that it will be useful, but WITHOUT
  12    ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  13    or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
  14    License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with GCC; see the file COPYING.  If not, write to the Free
  18    Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  19    02111-1307, USA.  */
  20
  21 /* Structure to hold information about the blocks during reordering.  */
  22 typedef struct reorder_block_def
  23 {
  24   rtx header;
  25   rtx footer;
  26   basic_block next;
  27   basic_block original;
  28   /* Used by loop copying.  */
  29   basic_block copy;
  30   int duplicated;
  31
  32   /* These fields are used by bb-reorder pass.  */
  33   int visited;
  34 } *reorder_block_def;
  35
  36 #define RBI(BB) ((reorder_block_def) (BB)->aux)
  37
  38 extern void cfg_layout_initialize       PARAMS ((struct loops *));
  39 extern void cfg_layout_finalize         PARAMS ((void));
  40 extern bool cfg_layout_can_duplicate_bb_p PARAMS ((basic_block));
  41 extern basic_block cfg_layout_duplicate_bb PARAMS ((basic_block, edge));
  42 extern void scope_to_insns_initialize   PARAMS ((void));
  43 extern void scope_to_insns_finalize     PARAMS ((void));
  44 extern bool cfg_layout_redirect_edge    PARAMS ((edge, basic_block));
  45 extern edge cfg_layout_split_block      PARAMS ((basic_block, rtx));