diff --git a/llvm/lib/Target/X86/X86SelectionDAGInfo.cpp b/llvm/lib/Target/X86/X86SelectionDAGInfo.cpp
--- a/llvm/lib/Target/X86/X86SelectionDAGInfo.cpp
+++ b/llvm/lib/Target/X86/X86SelectionDAGInfo.cpp
@@ -204,7 +204,7 @@
 static SDValue emitConstantSizeRepmov(
     SelectionDAG &DAG, const X86Subtarget &Subtarget, const SDLoc &dl,
     SDValue Chain, SDValue Dst, SDValue Src, uint64_t Size, EVT SizeVT,
-    unsigned Align, bool isVolatile, bool AlwaysInline,
+    uint64_t Align, bool isVolatile, bool AlwaysInline,
     MachinePointerInfo DstPtrInfo, MachinePointerInfo SrcPtrInfo) {
 
   /// TODO: Revisit next line: big copy with ERMSB on march >= haswell are very