Index: lib/Target/PowerPC/PPCISelLowering.h
===================================================================
--- lib/Target/PowerPC/PPCISelLowering.h
+++ lib/Target/PowerPC/PPCISelLowering.h
@@ -884,6 +884,11 @@
       }
     };
 
+    bool isNoopAddrSpaceCast(unsigned SrcAS, unsigned DestAS) const override {
+      // Addrspacecasts are always noops.
+      return true;
+    }
+
     bool canReuseLoadAddress(SDValue Op, EVT MemVT, ReuseLoadInfo &RLI,
                              SelectionDAG &DAG,
                              ISD::LoadExtType ET = ISD::NON_EXTLOAD) const;