Enable prefetch generation on PPC64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153851 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 00f2dcc..96b7074 100644
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -389,6 +389,9 @@
     setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
   }
 
+  if (TM.getSubtarget<PPCSubtarget>().has64BitSupport())
+    setOperationAction(ISD::PREFETCH, MVT::Other, Legal);
+
   setOperationAction(ISD::ATOMIC_LOAD,  MVT::i32, Expand);
   setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Expand);