From 079990a2bffd576c7f8a3f375e8f02be2bc00306 Mon Sep 17 00:00:00 2001 From: Jan Hubicka Date: Sun, 31 Aug 2008 17:54:54 +0200 Subject: [PATCH] tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Check that loop is optimized for speed. * tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Check that loop is optimized for speed. From-SVN: r139834 --- gcc/ChangeLog | 5 +++++ gcc/tree-ssa-loop-unswitch.c | 8 ++++++++ 2 files changed, 13 insertions(+) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 72a46cfefab..e046003da7a 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2008-08-31 Jan Hubicka + + * tree-ssa-loop-unswitch.c (tree_unswitch_single_loop): Check that + loop is optimized for speed. + 2008-08-31 Richard Guenther PR middle-end/37289 diff --git a/gcc/tree-ssa-loop-unswitch.c b/gcc/tree-ssa-loop-unswitch.c index 850270f49c0..26abed2dd8f 100644 --- a/gcc/tree-ssa-loop-unswitch.c +++ b/gcc/tree-ssa-loop-unswitch.c @@ -198,6 +198,14 @@ tree_unswitch_single_loop (struct loop *loop, int num) return false; } + /* Do not unswitch in cold regions. */ + if (optimize_loop_for_size_p (loop)) + { + if (dump_file && (dump_flags & TDF_DETAILS)) + fprintf (dump_file, ";; Not unswitching cold loops\n"); + return false; + } + /* The loop should not be too large, to limit code growth. */ if (tree_num_loop_insns (loop, &eni_size_weights) > (unsigned) PARAM_VALUE (PARAM_MAX_UNSWITCH_INSNS))