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
@@ -318,4 +318,44 @@
   let assemblyFormat = "attr-dict ($operands^ `:` type($operands))?";
 }
 
+//===----------------------------------------------------------------------===//
+// 2.14.4. Update Directive
+//===----------------------------------------------------------------------===//
+
+def OpenACC_UpdateOp : OpenACC_Op<"update", [AttrSizedOperandSegments]> {
+  let summary = "update operation";
+
+  let description = [{
+    The "acc.udpate" operation represents the OpenACC update executable
+    directive.
+    As host and self clauses are synonyms, any operands for host and self are
+    add to $hostOperands.
+
+    Example:
+
+    ```mlir
+    acc.update device(%d1 : memref<10xf32>) attributes {async}
+    ```
+  }];
+
+  let arguments = (ins Optional<IntOrIndex>:$asyncOperand,
+                       Optional<IntOrIndex>:$waitDevnum,
+                       Variadic<IntOrIndex>:$waitOperands,
+                       UnitAttr:$async,
+                       UnitAttr:$wait,
+                       Variadic<AnyType>:$hostOperands,
+                       Variadic<AnyType>:$deviceOperands,
+                       UnitAttr:$ifPresent);
+
+  let assemblyFormat = [{
+    ( `async` `(` $asyncOperand^ `:` type($asyncOperand) `)` )?
+    ( `wait_devnum` `(` $waitDevnum^ `:` type($waitDevnum) `)` )?
+    ( `wait` `(` $waitOperands^ `:` type($waitOperands) `)` )?
+    ( `host` `(` $hostOperands^ `:` type($hostOperands) `)` )?
+    ( `device` `(` $deviceOperands^ `:` type($deviceOperands) `)` )?
+    attr-dict-with-keyword
+  }];
+}
+
+
 #endif // OPENACC_OPS
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
@@ -645,6 +645,33 @@
   if (dataOp.getOperands().size() == 0 && !dataOp.defaultAttr())
     return dataOp.emitError("at least one operand or the default attribute "
                             "must appear on the data operation");
+  return success();
+}
+
+//===----------------------------------------------------------------------===//
+// UpdateOp
+//===----------------------------------------------------------------------===//
+
+static LogicalResult verify(acc::UpdateOp updateOp) {
+  // At least one of host or device should have a value.
+  if (updateOp.hostOperands().size() == 0 &&
+      updateOp.deviceOperands().size() == 0)
+    return updateOp.emitError("at least one value must be present in"
+                              " hostOperands or deviceOperands");
+
+  // The async attribute represent the async clause without value. Therefore the
+  // attribute and operand cannot appear at the same time.
+  if (updateOp.asyncOperand() && updateOp.async())
+    return updateOp.emitError("async attribute cannot appear with "
+                              " asyncOperand");
+
+  // The wait attribute represent the wait clause without values. Therefore the
+  // attribute and operands cannot appear at the same time.
+  if (updateOp.waitOperands().size() > 0 && updateOp.wait())
+    return updateOp.emitError("wait attribute cannot appear with waitOperands");
+
+  if (updateOp.waitDevnum() && updateOp.waitOperands().size() == 0)
+    return updateOp.emitError("wait_devnum cannot appear without waitOperands");
 
   return success();
 }
diff --git a/mlir/test/Dialect/OpenACC/invalid.mlir b/mlir/test/Dialect/OpenACC/invalid.mlir
--- a/mlir/test/Dialect/OpenACC/invalid.mlir
+++ b/mlir/test/Dialect/OpenACC/invalid.mlir
@@ -75,3 +75,26 @@
 }
 
 // -----
+// expected-error@+1 {{at least one value must be present in hostOperands or deviceOperands}}
+acc.update
+
+// -----
+
+%cst = constant 1 : index
+%value = alloc() : memref<10xf32>
+// expected-error@+1 {{wait_devnum cannot appear without waitOperands}}
+acc.update wait_devnum(%cst: index) host(%value: memref<10xf32>)
+
+// -----
+
+%cst = constant 1 : index
+%value = alloc() : memref<10xf32>
+// expected-error@+1 {{async attribute cannot appear with  asyncOperand}}
+acc.update async(%cst: index) host(%value: memref<10xf32>) attributes {async}
+
+// -----
+
+%cst = constant 1 : index
+%value = alloc() : memref<10xf32>
+// expected-error@+1 {{wait attribute cannot appear with waitOperands}}
+acc.update wait(%cst: index) host(%value: memref<10xf32>) attributes {wait}
diff --git a/mlir/test/Dialect/OpenACC/ops.mlir b/mlir/test/Dialect/OpenACC/ops.mlir
--- a/mlir/test/Dialect/OpenACC/ops.mlir
+++ b/mlir/test/Dialect/OpenACC/ops.mlir
@@ -524,3 +524,33 @@
 // CHECK-NEXT: } attributes {defaultAttr = "present"}
 // CHECK:      acc.data {
 // CHECK-NEXT: } attributes {defaultAttr = "none"}
+
+// -----
+
+func @testupdateop(%a: memref<10xf32>, %b: memref<10xf32>, %c: memref<10x10xf32>) -> () {
+  %i64Value = constant 1 : i64
+  %i32Value = constant 1 : i32
+  %idxValue = constant 1 : index
+  acc.update async(%i64Value: i64) host(%a: memref<10xf32>)
+  acc.update async(%i32Value: i32) host(%a: memref<10xf32>)
+  acc.update async(%idxValue: index) host(%a: memref<10xf32>)
+  acc.update wait_devnum(%i64Value: i64) wait(%i32Value, %idxValue : i32, index) host(%a: memref<10xf32>)
+  acc.update host(%a: memref<10xf32>) device(%b, %c : memref<10xf32>, memref<10x10xf32>)
+  acc.update host(%a: memref<10xf32>) device(%b, %c : memref<10xf32>, memref<10x10xf32>) attributes {async}
+  acc.update host(%a: memref<10xf32>) device(%b, %c : memref<10xf32>, memref<10x10xf32>) attributes {wait}
+  acc.update host(%a: memref<10xf32>) device(%b, %c : memref<10xf32>, memref<10x10xf32>) attributes {ifPresent}
+  return
+}
+
+// CHECK: func @testupdateop([[ARGA:%.*]]: memref<10xf32>, [[ARGB:%.*]]: memref<10xf32>, [[ARGC:%.*]]: memref<10x10xf32>) {
+// CHECK:   [[I64VALUE:%.*]] = constant 1 : i64
+// CHECK:   [[I32VALUE:%.*]] = constant 1 : i32
+// CHECK:   [[IDXVALUE:%.*]] = constant 1 : index
+// CHECK:   acc.update async([[I64VALUE]] : i64) host([[ARGA]] : memref<10xf32>)
+// CHECK:   acc.update async([[I32VALUE]] : i32) host([[ARGA]] : memref<10xf32>)
+// CHECK:   acc.update async([[IDXVALUE]] : index) host([[ARGA]] : memref<10xf32>)
+// CHECK:   acc.update wait_devnum([[I64VALUE]] : i64) wait([[I32VALUE]], [[IDXVALUE]] : i32, index) host([[ARGA]] : memref<10xf32>)
+// CHECK:   acc.update host([[ARGA]] : memref<10xf32>) device([[ARGB]], [[ARGC]] : memref<10xf32>, memref<10x10xf32>)
+// CHECK:   acc.update host([[ARGA]] : memref<10xf32>) device([[ARGB]], [[ARGC]] : memref<10xf32>, memref<10x10xf32>) attributes {async}
+// CHECK:   acc.update host([[ARGA]] : memref<10xf32>) device([[ARGB]], [[ARGC]] : memref<10xf32>, memref<10x10xf32>) attributes {wait}
+// CHECK:   acc.update host([[ARGA]] : memref<10xf32>) device([[ARGB]], [[ARGC]] : memref<10xf32>, memref<10x10xf32>) attributes {ifPresent}