[Bug tree-optimization/53395] [4.8 Regression] The LAPACK functions i(d|s)amax are more than two times slower after revision 187183

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53395

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-05-18 
16:03:46 UTC ---
This should fix tree-if-conv.c:
Index: tree-if-conv.c
===================================================================
--- tree-if-conv.c    (revision 187647)
+++ tree-if-conv.c    (working copy)
@@ -1313,8 +1313,8 @@ predicate_scalar_phi (gimple phi, tree c
                || bb_postdominates_preds (bb));

       /* Build new RHS using selected condition and arguments.  */
-      rhs = build3 (COND_EXPR, TREE_TYPE (res),
-            unshare_expr (cond), arg_0, arg_1);
+      rhs = fold_build3 (COND_EXPR, TREE_TYPE (res),
+                 unshare_expr (cond), arg_0, arg_1);
     }

   new_stmt = gimple_build_assign (res, rhs);