diff --git a/flang/lib/Optimizer/CodeGen/LowerRepackArrays.cpp b/flang/lib/Optimizer/CodeGen/LowerRepackArrays.cpp
index ac432c74f0147..81488d75d0ab6 100644
--- a/flang/lib/Optimizer/CodeGen/LowerRepackArrays.cpp
+++ b/flang/lib/Optimizer/CodeGen/LowerRepackArrays.cpp
@@ -289,7 +289,6 @@ PackArrayConversion::genRepackedBox(fir::FirOpBuilder &builder,
   fir::factory::genDimInfoFromBox(builder, loc, box, &lbounds, &extents,
                                   /*strides=*/nullptr);
   // Get the type parameters from the box, if needed.
-  llvm::SmallVector<mlir::Value> assumedTypeParams;
   if (numTypeParams != 0) {
     if (auto charType =
             mlir::dyn_cast<fir::CharacterType>(boxType.unwrapInnerType()))
diff --git a/flang/lib/Optimizer/OpenMP/DoConcurrentConversion.cpp b/flang/lib/Optimizer/OpenMP/DoConcurrentConversion.cpp
index 1229018bd9b3e..9aad8cddc60a1 100644
--- a/flang/lib/Optimizer/OpenMP/DoConcurrentConversion.cpp
+++ b/flang/lib/Optimizer/OpenMP/DoConcurrentConversion.cpp
@@ -692,9 +692,6 @@ class DoConcurrentConversion
       if (!targetShapeCreationInfo.isShapedValue())
         return {};
 
-      llvm::SmallVector<mlir::Value> extentOperands;
-      llvm::SmallVector<mlir::Value> startIndexOperands;
-
       if (targetShapeCreationInfo.isShapeShiftedValue()) {
         llvm::SmallVector<mlir::Value> shapeShiftOperands;
 
diff --git a/flang/lib/Optimizer/Transforms/SimplifyIntrinsics.cpp b/flang/lib/Optimizer/Transforms/SimplifyIntrinsics.cpp
index 49a085ee3b336..49ae189d0b758 100644
--- a/flang/lib/Optimizer/Transforms/SimplifyIntrinsics.cpp
+++ b/flang/lib/Optimizer/Transforms/SimplifyIntrinsics.cpp
@@ -730,7 +730,6 @@ static void genRuntimeMinMaxlocBody(fir::FirOpBuilder &builder,
       mlir::Value ifCompatElem =
           fir::ConvertOp::create(builder, loc, ifCompatType, maskElem);
 
-      llvm::SmallVector<mlir::Type> resultsTy = {elementType, elementType};
       fir::IfOp ifOp =
           fir::IfOp::create(builder, loc, elementType, ifCompatElem,
                             /*withElseRegion=*/true);