[wasm][asm.js] Exclude zero left hand side in arm64 isel.

test/mjsunit/asm/regress-641885.js

Index: test/mjsunit/asm/regress-641885.js
diff --git a/test/mjsunit/asm/regress-641885.js b/test/mjsunit/asm/regress-641885.js
new file mode 100644
index 0000000000000000000000000000000000000000..4d0c11b90097868f2beeb86c90082d0a85dc8aa5
--- /dev/null
+++ b/test/mjsunit/asm/regress-641885.js
@@ -0,0 +1,13 @@
+// Copyright 2017 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.
+
+var __f_2 = (function __f_4() {
+  "use asm";
+  function __f_2(i) {
+    i = i|0;
+    i = i << -2147483648 >> -1073741824;
+    return i|0;
+  }
+  return { __f_2: __f_2 };
+})().__f_2;