Make store likely in optimize_mask_stores

[Jan Hubicka via Gcc-patches]

Hi,
as discussed with Richard, we want store to be likely in
optimize_mask_stores.

Bootstrapped/regtested x86_64-linux, comitted.

gcc/ChangeLog:

        * tree-vect-loop.cc (optimize_mask_stores): Make store
        likely.

diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index 2561552fe6e..a83952aff60 100644
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -11741,7 +11741,7 @@ optimize_mask_stores (class loop *loop)
       e->flags = EDGE_TRUE_VALUE;
       efalse = make_edge (bb, store_bb, EDGE_FALSE_VALUE);
       /* Put STORE_BB to likely part.  */
-      efalse->probability = profile_probability::unlikely ();
+      efalse->probability = profile_probability::likely ();
       e->probability = efalse->probability.invert ();
       store_bb->count = efalse->count ();
       make_single_succ_edge (store_bb, join_bb, EDGE_FALLTHRU);