/* Loop unswitching.
- Copyright (C) 2004, 2005 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2005, 2007 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
+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
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, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "domwalk.h"
#include "params.h"
#include "tree-pass.h"
+#include "tree-inline.h"
/* This file implements the loop unswitching, i.e. transformation of loops like
bool changed = false;
/* Go through inner loops (only original ones). */
- FOR_EACH_LOOP (li, loop, LI_ONLY_OLD | LI_ONLY_INNERMOST)
+ FOR_EACH_LOOP (li, loop, LI_ONLY_INNERMOST)
{
changed |= tree_unswitch_single_loop (loop, 0);
}
}
/* The loop should not be too large, to limit code growth. */
- if (tree_num_loop_insns (loop)
+ if (tree_num_loop_insns (loop, &eni_size_weights)
> (unsigned) PARAM_VALUE (PARAM_MAX_UNSWITCH_INSNS))
{
if (dump_file && (dump_flags & TDF_DETAILS))
tree_unswitch_loop (struct loop *loop,
basic_block unswitch_on, tree cond)
{
- basic_block condition_bb;
+ unsigned prob_true;
+ edge edge_true, edge_false;
/* Some sanity checking. */
gcc_assert (flow_bb_inside_loop_p (loop, unswitch_on));
gcc_assert (EDGE_COUNT (unswitch_on->succs) == 2);
gcc_assert (loop->inner == NULL);
+ extract_true_false_edges_from_block (unswitch_on, &edge_true, &edge_false);
+ prob_true = edge_true->probability;
return loop_version (loop, unshare_expr (cond),
- &condition_bb, false);
+ NULL, prob_true, prob_true,
+ REG_BR_PROB_BASE - prob_true, false);
}