Return an ArrayRef from ShuffleVectorSDNode::getMask and push it through CodeGen.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148218 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index c8c4f73..df7dbe0 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -4258,8 +4258,7 @@
 
   // Check to see if this is a shuffle of 4-byte values.  If so, we can use our
   // perfect shuffle table to emit an optimal matching sequence.
-  SmallVector<int, 16> PermMask;
-  SVOp->getMask(PermMask);
+  ArrayRef<int> PermMask = SVOp->getMask();
 
   unsigned PFIndexes[4];
   bool isFourElementShuffle = true;