diff --git a/flang/lib/Lower/OpenACC.cpp b/flang/lib/Lower/OpenACC.cpp
--- a/flang/lib/Lower/OpenACC.cpp
+++ b/flang/lib/Lower/OpenACC.cpp
@@ -753,7 +753,10 @@
     if (!fir::isa_trivial(reductionTy))
       TODO(operandLocation, "reduction with unsupported type");
 
-    mlir::Type ty = fir::unwrapRefType(baseAddr.getType());
+    auto op = createDataEntryOp<mlir::acc::ReductionOp>(
+        builder, operandLocation, baseAddr, asFortran, bounds,
+        /*structured=*/true, mlir::acc::DataClause::acc_reduction);
+    mlir::Type ty = fir::unwrapRefType(op.getAccPtr().getType());
     if (!fir::isa_trivial(ty))
       ty = baseAddr.getType();
     std::string recipeName = fir::getTypeAsString(
@@ -764,7 +767,7 @@
                                                    operandLocation, ty, mlirOp);
     reductionRecipes.push_back(mlir::SymbolRefAttr::get(
         builder.getContext(), recipe.getSymName().str()));
-    reductionOperands.push_back(baseAddr);
+    reductionOperands.push_back(op.getAccPtr());
   }
 }
 
diff --git a/flang/test/Lower/OpenACC/acc-reduction.f90 b/flang/test/Lower/OpenACC/acc-reduction.f90
--- a/flang/test/Lower/OpenACC/acc-reduction.f90
+++ b/flang/test/Lower/OpenACC/acc-reduction.f90
@@ -213,7 +213,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_add_int(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xi32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<i32> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_add_i32 -> %[[B]] : !fir.ref<i32>)
+! CHECK:       %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<i32>) -> !fir.ref<i32> {name = "b"} 
+! CHECK:       acc.loop reduction(@reduction_add_i32 -> %[[RED_B]] : !fir.ref<i32>)
 
 subroutine acc_reduction_add_int_array_1d(a, b)
   integer :: a(100)
@@ -227,7 +228,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_add_int_array_1d(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xi32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<!fir.array<100xi32>> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_add_ref_100xi32 -> %[[B]] : !fir.ref<!fir.array<100xi32>>)
+! CHECK:       %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<!fir.array<100xi32>>) bounds(%{{.*}}) -> !fir.ref<!fir.array<100xi32>> {name = "b"} 
+! CHECK:       acc.loop reduction(@reduction_add_ref_100xi32 -> %[[RED_B]] : !fir.ref<!fir.array<100xi32>>)
 
 subroutine acc_reduction_add_int_array_2d(a, b)
   integer :: a(100, 10), b(100, 10)
@@ -243,7 +245,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_add_int_array_2d(
 ! CHECK-SAME:  %[[ARG0:.*]]: !fir.ref<!fir.array<100x10xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.ref<!fir.array<100x10xi32>> {fir.bindc_name = "b"}) {
-! CHECK:       acc.loop reduction(@reduction_add_ref_100x10xi32 -> %[[ARG1]] : !fir.ref<!fir.array<100x10xi32>>) {
+! CHECK:       %[[RED_ARG1:.*]] = acc.reduction varPtr(%[[ARG1]] : !fir.ref<!fir.array<100x10xi32>>) bounds(%{{.*}}, %{{.*}}) -> !fir.ref<!fir.array<100x10xi32>> {name = "b"} 
+! CHECK:       acc.loop reduction(@reduction_add_ref_100x10xi32 -> %[[RED_ARG1]] : !fir.ref<!fir.array<100x10xi32>>) {
 ! CHECK: } attributes {collapse = 2 : i64}
 
 subroutine acc_reduction_add_int_array_3d(a, b)
@@ -262,7 +265,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_add_int_array_3d(
 ! CHECK-SAME: %{{.*}}: !fir.ref<!fir.array<100x10x2xi32>> {fir.bindc_name = "a"}, %[[ARG1:.*]]: !fir.ref<!fir.array<100x10x2xi32>> {fir.bindc_name = "b"})
-! CHECK: acc.loop reduction(@reduction_add_ref_100x10x2xi32 -> %[[ARG1]] : !fir.ref<!fir.array<100x10x2xi32>>)
+! CHECK: %[[RED_ARG1:.*]] = acc.reduction varPtr(%[[ARG1]] : !fir.ref<!fir.array<100x10x2xi32>>) bounds(%{{.*}}, %{{.*}}, %{{.*}}) -> !fir.ref<!fir.array<100x10x2xi32>> {name = "b"}
+! CHECK: acc.loop reduction(@reduction_add_ref_100x10x2xi32 -> %[[RED_ARG1]] : !fir.ref<!fir.array<100x10x2xi32>>)
 ! CHECK: } attributes {collapse = 3 : i64}
 
 subroutine acc_reduction_add_float(a, b)
@@ -277,7 +281,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_add_float(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xf32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<f32> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_add_f32 -> %[[B]] : !fir.ref<f32>)
+! CHECK:       %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<f32>) -> !fir.ref<f32> {name = "b"}
+! CHECK:       acc.loop reduction(@reduction_add_f32 -> %[[RED_B]] : !fir.ref<f32>)
 
 subroutine acc_reduction_add_float_array_1d(a, b)
   real :: a(100), b(100)
@@ -291,7 +296,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_add_float_array_1d(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xf32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<!fir.array<100xf32>> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_add_ref_100xf32 -> %[[B]] : !fir.ref<!fir.array<100xf32>>)
+! CHECK: %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<!fir.array<100xf32>>) bounds(%{{.*}}) -> !fir.ref<!fir.array<100xf32>> {name = "b"} 
+! CHECK:       acc.loop reduction(@reduction_add_ref_100xf32 -> %[[RED_B]] : !fir.ref<!fir.array<100xf32>>)
 
 subroutine acc_reduction_mul_int(a, b)
   integer :: a(100)
@@ -305,7 +311,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_mul_int(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xi32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<i32> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_mul_i32 -> %[[B]] : !fir.ref<i32>)
+! CHECK:       %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<i32>) -> !fir.ref<i32> {name = "b"}
+! CHECK:       acc.loop reduction(@reduction_mul_i32 -> %[[RED_B]] : !fir.ref<i32>)
 
 subroutine acc_reduction_mul_int_array_1d(a, b)
   integer :: a(100)
@@ -319,7 +326,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_mul_int_array_1d(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xi32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<!fir.array<100xi32>> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_mul_ref_100xi32 -> %[[B]] : !fir.ref<!fir.array<100xi32>>)
+! CHECK:       %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<!fir.array<100xi32>>) bounds(%{{.*}}) -> !fir.ref<!fir.array<100xi32>> {name = "b"} 
+! CHECK:       acc.loop reduction(@reduction_mul_ref_100xi32 -> %[[RED_B]] : !fir.ref<!fir.array<100xi32>>)
 
 subroutine acc_reduction_mul_float(a, b)
   real :: a(100), b
@@ -333,7 +341,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_mul_float(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xf32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<f32> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_mul_f32 -> %[[B]] : !fir.ref<f32>)
+! CHECK:       %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<f32>) -> !fir.ref<f32> {name = "b"} 
+! CHECK:       acc.loop reduction(@reduction_mul_f32 -> %[[RED_B]] : !fir.ref<f32>)
 
 subroutine acc_reduction_mul_float_array_1d(a, b)
   real :: a(100), b(100)
@@ -347,7 +356,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_mul_float_array_1d(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xf32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<!fir.array<100xf32>> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_mul_ref_100xf32 -> %[[B]] : !fir.ref<!fir.array<100xf32>>)
+! CHECK:       %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<!fir.array<100xf32>>) bounds(%2) -> !fir.ref<!fir.array<100xf32>> {name = "b"} 
+! CHECK:       acc.loop reduction(@reduction_mul_ref_100xf32 -> %[[RED_B]] : !fir.ref<!fir.array<100xf32>>)
 
 subroutine acc_reduction_min_int(a, b)
   integer :: a(100)
@@ -361,7 +371,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_min_int(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xi32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<i32> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_min_i32 -> %[[B]] : !fir.ref<i32>)
+! CHECK:       %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<i32>) -> !fir.ref<i32> {name = "b"} 
+! CHECK:       acc.loop reduction(@reduction_min_i32 -> %[[RED_B]] : !fir.ref<i32>)
 
 subroutine acc_reduction_min_float(a, b)
   real :: a(100), b
@@ -375,7 +386,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_min_float(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xf32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<f32> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_min_f32 -> %[[B]] : !fir.ref<f32>)
+! CHECK:       %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<f32>) -> !fir.ref<f32> {name = "b"} 
+! CHECK:       acc.loop reduction(@reduction_min_f32 -> %[[RED_B]] : !fir.ref<f32>)
 
 subroutine acc_reduction_max_int(a, b)
   integer :: a(100)
@@ -389,7 +401,8 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_max_int(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xi32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<i32> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_max_i32 -> %[[B]] : !fir.ref<i32>)
+! CHECL:       %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<i32>) -> !fir.ref<i32> {name = "b"} 
+! CHECK:       acc.loop reduction(@reduction_max_i32 -> %[[RED_B]] : !fir.ref<i32>)
 
 subroutine acc_reduction_max_float(a, b)
   real :: a(100), b
@@ -403,4 +416,5 @@
 
 ! CHECK-LABEL: func.func @_QPacc_reduction_max_float(
 ! CHECK-SAME:  %{{.*}}: !fir.ref<!fir.array<100xf32>> {fir.bindc_name = "a"}, %[[B:.*]]: !fir.ref<f32> {fir.bindc_name = "b"})
-! CHECK:       acc.loop reduction(@reduction_max_f32 -> %[[B]] : !fir.ref<f32>)
+! CHECK:       %[[RED_B:.*]] = acc.reduction varPtr(%[[B]] : !fir.ref<f32>) -> !fir.ref<f32> {name = "b"} 
+! CHECK:       acc.loop reduction(@reduction_max_f32 -> %[[RED_B]] : !fir.ref<f32>)
diff --git a/mlir/include/mlir/Dialect/OpenACC/OpenACCOps.td b/mlir/include/mlir/Dialect/OpenACC/OpenACCOps.td
--- a/mlir/include/mlir/Dialect/OpenACC/OpenACCOps.td
+++ b/mlir/include/mlir/Dialect/OpenACC/OpenACCOps.td
@@ -94,6 +94,7 @@
 def OpenACC_UpdateSelf            : I64EnumAttrCase<"acc_update_self", 18>;
 def OpenACC_UpdateDevice          : I64EnumAttrCase<"acc_update_device", 19>;
 def OpenACC_UseDevice             : I64EnumAttrCase<"acc_use_device", 20>;
+def OpenACC_Reduction             : I64EnumAttrCase<"acc_reduction", 21>;
 
 def OpenACC_DataClauseEnum : I64EnumAttr<"DataClause",
     "data clauses supported by OpenACC",
@@ -104,6 +105,7 @@
      OpenACC_PrivateClause, OpenACC_FirstPrivateClause,
      OpenACC_IsDevicePtrClause, OpenACC_GetDevicePtrClause, OpenACC_UpdateHost,
      OpenACC_UpdateSelf, OpenACC_UpdateDevice, OpenACC_UseDevice,
+     OpenACC_Reduction,
     ]> {
   let cppNamespace = "::mlir::acc";
 }
@@ -239,6 +241,14 @@
                 "clause.";
 }
 
+//===----------------------------------------------------------------------===//
+// 2.5.15 reduction clause
+//===----------------------------------------------------------------------===//
+def OpenACC_ReductionOp : OpenACC_DataEntryOp<"reduction",
+    "mlir::acc::DataClause::acc_reduction"> {
+  let summary = "Represents reduction semantics for acc reduction clause.";
+}
+
 //===----------------------------------------------------------------------===//
 // 2.7.4 deviceptr clause
 //===----------------------------------------------------------------------===//
diff --git a/mlir/lib/Dialect/OpenACC/IR/OpenACC.cpp b/mlir/lib/Dialect/OpenACC/IR/OpenACC.cpp
--- a/mlir/lib/Dialect/OpenACC/IR/OpenACC.cpp
+++ b/mlir/lib/Dialect/OpenACC/IR/OpenACC.cpp
@@ -81,6 +81,16 @@
   return success();
 }
 
+//===----------------------------------------------------------------------===//
+// ReductionOp
+//===----------------------------------------------------------------------===//
+LogicalResult acc::ReductionOp::verify() {
+  if (getDataClause() != acc::DataClause::acc_reduction)
+    return emitError("data clause associated with reduction operation must "
+                     "match its intent");
+  return success();
+}
+
 //===----------------------------------------------------------------------===//
 // DevicePtrOp
 //===----------------------------------------------------------------------===//