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diff --git a/deps/v8/test/mjsunit/regress/asm/regress-6838-4.js b/deps/v8/test/mjsunit/regress/asm/regress-6838-4.js
new file mode 100644
index 0000000000..6c6f8e0f73
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+++ b/deps/v8/test/mjsunit/regress/asm/regress-6838-4.js
@@ -0,0 +1,79 @@
+// Copyright 2020 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
+
+(function TestMinusZeroIsDouble() {
+  function Module(stdlib) {
+    'use asm';
+    function f() {
+      var x = 0.;
+      x = 1. / +-0;
+      return +x;
+    }
+    return f;
+  }
+  var f = Module(this);
+  assertEquals(-Infinity, f());
+  assertTrue(%IsAsmWasmCode(Module));
+})();
+
+(function TestMinusZeroIsDoubleBracketed() {
+  function Module(stdlib) {
+    'use asm';
+    function f() {
+      var x = 0.;
+      x = 1. / (-0);
+      return +x;
+    }
+    return f;
+  }
+  var f = Module(this);
+  assertEquals(-Infinity, f());
+  assertTrue(%IsAsmWasmCode(Module));
+})();
+
+(function TestMinusZeroIsDoubleMultDouble1() {
+  function Module(stdlib) {
+    'use asm';
+    function f() {
+      var x = 0.;
+      x = 1. / (-0 * 1.0);
+      return +x;
+    }
+    return f;
+  }
+  var f = Module(this);
+  assertEquals(-Infinity, f());
+  assertTrue(%IsAsmWasmCode(Module));
+})();
+
+(function TestMinusZeroIsDoubleMultDouble2() {
+  function Module(stdlib) {
+    'use asm';
+    function f() {
+      var x = 0.;
+      x = 1. / (1.0 * -0);
+      return +x;
+    }
+    return f;
+  }
+  var f = Module(this);
+  assertEquals(-Infinity, f());
+  assertTrue(%IsAsmWasmCode(Module));
+})();
+
+(function TestMinusZeroIsDoubleMultInt() {
+  function Module(stdlib) {
+    'use asm';
+    function f() {
+      var x = 0.;
+      x = 1. / (-0 * 1);
+      return +x;
+    }
+    return f;
+  }
+  var f = Module(this);
+  assertFalse(%IsAsmWasmCode(Module));
+})();