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diff --git a/deps/v8/test/mjsunit/compiler/math-imul.js b/deps/v8/test/mjsunit/compiler/math-imul.js
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+++ b/deps/v8/test/mjsunit/compiler/math-imul.js
@@ -0,0 +1,76 @@
+// 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 --opt
+
+// Test Math.imul() with no inputs.
+(function() {
+  function foo() { return Math.imul(); }
+
+  assertEquals(0, foo());
+  assertEquals(0, foo());
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals(0, foo());
+})();
+
+// Test Math.imul() with only one input.
+(function() {
+  function foo(x) { return Math.imul(x); }
+
+  assertEquals(0, foo(1));
+  assertEquals(0, foo(2));
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals(0, foo(3));
+})();
+
+// Test Math.imul() with wrong types.
+(function() {
+  function foo(x, y) { return Math.imul(x, y); }
+
+  assertEquals(0, foo(null, 1));
+  assertEquals(0, foo(2, undefined));
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals(0, foo(null, 1));
+  assertEquals(0, foo(2, undefined));
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals(0, foo(null, 1));
+  assertEquals(0, foo(2, undefined));
+  assertOptimized(foo);
+})();
+
+// Test Math.imul() with signed integers (statically known).
+(function() {
+  function foo(x, y) { return Math.imul(x|0, y|0); }
+
+  assertEquals(1, foo(1, 1));
+  assertEquals(2, foo(2, 1));
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals(1, foo(1, 1));
+  assertEquals(2, foo(2, 1));
+  assertOptimized(foo);
+})();
+
+// Test Math.imul() with unsigned integers (statically known).
+(function() {
+  function foo(x, y) { return Math.imul(x>>>0, y>>>0); }
+
+  assertEquals(1, foo(1, 1));
+  assertEquals(2, foo(2, 1));
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals(1, foo(1, 1));
+  assertEquals(2, foo(2, 1));
+  assertOptimized(foo);
+})();
+
+// Test Math.imul() with floating-point numbers.
+(function() {
+  function foo(x, y) { return Math.imul(x, y); }
+
+  assertEquals(1, foo(1.1, 1.1));
+  assertEquals(2, foo(2.1, 1.1));
+  %OptimizeFunctionOnNextCall(foo);
+  assertEquals(1, foo(1.1, 1.1));
+  assertEquals(2, foo(2.1, 1.1));
+  assertOptimized(foo);
+})();