[wasm] Forbid sign mismatch in asm typer.

test/mjsunit/regress/regress-wasm-crbug-618602.js

Index: test/mjsunit/regress/regress-wasm-crbug-618602.js
diff --git a/test/mjsunit/regress/regress-wasm-crbug-618602.js b/test/mjsunit/regress/regress-wasm-crbug-618602.js
new file mode 100644
index 0000000000000000000000000000000000000000..f36a6bdf7dbd00d30f769d4879ad29e56f008466
--- /dev/null
+++ b/test/mjsunit/regress/regress-wasm-crbug-618602.js
@@ -0,0 +1,17 @@
+// Copyright 2016 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: --expose-wasm
+
+function __f_1() {
+  'use asm';
+  function __f_3() {
+    var __v_11 = 1, __v_10 = 0, __v_12 = 0;
+    __v_12 = (__v_10 | 12) % 4294967295 | -1073741824;
+  }
+  return { __f_3: __f_3 };
+}
+assertThrows(function() {
+  Wasm.instantiateModuleFromAsm(__f_1.toString());
+});