Add -ftree-loop-distribute-patterns enabled at -O3.

2010-08-02  Sebastian Pop  <sebastian.pop@amd.com>

	* common.opt (ftree-loop-distribute-patterns): New.
	* invoke.texi (-ftree-loop-distribute-patterns): Documented.
	* opts.c (decode_options): Enable flag_tree_loop_distribute_patterns
	at -O3.
	* tree-data-ref.c (stores_zero_from_loop): New.
	* tree-data-ref.h (stores_zero_from_loop): Declared.
	* tree-loop-distribution.c (tree_loop_distribution): Call
	stores_zero_from_loop.
	(tree_loop_distribution): Check flag_tree_loop_distribute_patterns.

From-SVN: r162822

1 files changed, 1 insertions, 0 deletions

diff --git a/gcc/opts.c b/gcc/opts.c
index ebb3f38..caf4e16 100644
--- a/gcc/opts.c
+++ b/gcc/opts.c
@@ -819,6 +819,7 @@ decode_options (unsigned int argc, const char **argv,
 
   /* -O3 optimizations.  */
   opt3 = (optimize >= 3);
+  flag_tree_loop_distribute_patterns = opt3;
   flag_predictive_commoning = opt3;
   flag_inline_functions = opt3;
   flag_unswitch_loops = opt3;