GVN: Handle addrspacecast

llvm-svn: 361103
diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp
index f19bb33..a93a17f 100644
--- a/llvm/lib/Transforms/Scalar/GVN.cpp
+++ b/llvm/lib/Transforms/Scalar/GVN.cpp
@@ -523,6 +523,7 @@
     case Instruction::FPExt:
     case Instruction::PtrToInt:
     case Instruction::IntToPtr:
+    case Instruction::AddrSpaceCast:
     case Instruction::BitCast:
     case Instruction::Select:
     case Instruction::ExtractElement: