1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/lib/Transforms/Scalar/GVN.cpp b/llvm/lib/Transforms/Scalar/GVN.cpp
index 62039f9048f..738c4ea1d15 100644
--- a/llvm/lib/Transforms/Scalar/GVN.cpp
+++ b/llvm/lib/Transforms/Scalar/GVN.cpp
@@ -1220,8 +1220,8 @@ bool GVN::processInstruction(Instruction* I,
     if (dep == MemoryDependenceAnalysis::None ||
         dep == MemoryDependenceAnalysis::NonLocal)
       return false;
-    if (isa<MemCpyInst>(dep))
-      return processMemCpy(M, cast<MemCpyInst>(dep), toErase);
+    if (MemCpyInst *MemCpy = dyn_cast<MemCpyInst>(dep))
+      return processMemCpy(M, MemCpy, toErase);
     if (CallInst* C = dyn_cast<CallInst>(dep))
       return performReturnSlotOptzn(M, C, toErase);
     return false;