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diff --git a/deps/v8/test/mjsunit/regress/regress-crbug-884933.js b/deps/v8/test/mjsunit/regress/regress-crbug-884933.js
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index 0000000000..447d303bbf
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+++ b/deps/v8/test/mjsunit/regress/regress-crbug-884933.js
@@ -0,0 +1,85 @@
+// Copyright 2018 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+// Test Uint8 -> Word64 conversions.
+(function() {
+  function bar(x, y) {
+    return x + y;
+  }
+
+  bar(0.1, 0.2);
+  bar(0.1, 0.2);
+
+  function foo(dv) {
+    return bar(dv.getUint8(0, true), 0xFFFFFFFF);
+  }
+
+  const dv = new DataView(new ArrayBuffer(8));
+  assertEquals(0xFFFFFFFF, foo(dv));
+  assertEquals(0xFFFFFFFF, foo(dv));
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals(0xFFFFFFFF, foo(dv));
+})();
+
+// Test Int8 -> Word64 conversions.
+(function() {
+  function bar(x, y) {
+    return x + y;
+  }
+
+  bar(0.1, 0.2);
+  bar(0.1, 0.2);
+
+  function foo(dv) {
+    return bar(dv.getInt8(0, true), 0xFFFFFFFF);
+  }
+
+  const dv = new DataView(new ArrayBuffer(8));
+  assertEquals(0xFFFFFFFF, foo(dv));
+  assertEquals(0xFFFFFFFF, foo(dv));
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals(0xFFFFFFFF, foo(dv));
+})();
+
+// Test Uint16 -> Word64 conversions.
+(function() {
+  function bar(x, y) {
+    return x + y;
+  }
+
+  bar(0.1, 0.2);
+  bar(0.1, 0.2);
+
+  function foo(dv) {
+    return bar(dv.getUint16(0, true), 0xFFFFFFFF);
+  }
+
+  const dv = new DataView(new ArrayBuffer(8));
+  assertEquals(0xFFFFFFFF, foo(dv));
+  assertEquals(0xFFFFFFFF, foo(dv));
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals(0xFFFFFFFF, foo(dv));
+})();
+
+// Test Int16 -> Word64 conversions.
+(function() {
+  function bar(x, y) {
+    return x + y;
+  }
+
+  bar(0.1, 0.2);
+  bar(0.1, 0.2);
+
+  function foo(dv) {
+    return bar(dv.getInt16(0, true), 0xFFFFFFFF);
+  }
+
+  const dv = new DataView(new ArrayBuffer(8));
+  assertEquals(0xFFFFFFFF, foo(dv));
+  assertEquals(0xFFFFFFFF, foo(dv));
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals(0xFFFFFFFF, foo(dv));
+})();