[PATCH, rs6000] Cost model adjustment

[Bill Schmidt]

Hi,

This patch makes a slight adjustment to the vectorization cost model that
was previously overlooked.

Bootstrapped and tested on powerpc64le-unknown-linux gnu with no regressions.
Ok for trunk?

Thanks,
Bill


2016-12-13  Bill Schmidt  <wschm...@linux.vnet.ibm.com>

        * config/rs6000/rs600.c (rs6000_builtin_vectorization_cost):
        Adjust unaligned load cost.


Index: gcc/config/rs6000/rs6000.c
===================================================================
--- gcc/config/rs6000/rs6000.c  (revision 243578)
+++ gcc/config/rs6000/rs6000.c  (working copy)
@@ -5358,6 +5358,9 @@ rs6000_builtin_vectorization_cost (enum vect_cost_
         return 3;
 
       case unaligned_load:
+       if (TARGET_P9_VECTOR)
+         return 3;
+
        if (TARGET_EFFICIENT_UNALIGNED_VSX)
          return 1;