diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index fa26c972c9191..f4f9812a40243 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -9209,7 +9209,7 @@ static SDValue LowerBUILD_VECTORvXi1(SDValue Op, SelectionDAG &DAG,
   return DstVec;
 }
 
-static bool isHorizOp(unsigned Opcode) {
+LLVM_ATTRIBUTE_UNUSED static bool isHorizOp(unsigned Opcode) {
   switch (Opcode) {
   case X86ISD::PACKSS:
   case X86ISD::PACKUS: