AMDGPU/GlobalISel: Don't use a copy in addrspacecast lowering

llvm-svn: 353516
diff --git a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
index 3a7cb40..02528b6 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
@@ -707,7 +707,7 @@
 
   const GCNSubtarget &ST = MF.getSubtarget<GCNSubtarget>();
   if (ST.getTargetLowering()->isNoopAddrSpaceCast(SrcAS, DestAS)) {
-    MI.setDesc(MIRBuilder.getTII().get(TargetOpcode::COPY));
+    MI.setDesc(MIRBuilder.getTII().get(TargetOpcode::G_BITCAST));
     return true;
   }