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/* Basic block reordering routines for the GNU compiler.
Copyright (C) 2000 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 2, 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 COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
/* Structure to hold information about the blocks during reordering. */
typedef struct reorder_block_def
{
rtx header;
rtx footer;
basic_block next;
basic_block original;
/* Used by loop copying. */
basic_block copy;
int duplicated;
/* These fields are used by bb-reorder pass. */
int visited;
} *reorder_block_def;
#define RBI(BB) ((reorder_block_def) (BB)->aux)
extern void cfg_layout_initialize PARAMS ((struct loops *));
extern void cfg_layout_finalize PARAMS ((void));
extern bool cfg_layout_can_duplicate_bb_p PARAMS ((basic_block));
extern basic_block cfg_layout_duplicate_bb PARAMS ((basic_block, edge));
extern void scope_to_insns_initialize PARAMS ((void));
extern void scope_to_insns_finalize PARAMS ((void));
extern bool cfg_layout_redirect_edge PARAMS ((edge, basic_block));
extern edge cfg_layout_split_block PARAMS ((basic_block, rtx));
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