[asm] Fix lots of invalid asm.js tests

test/mjsunit/asm/redundancy1.js

 // Copyright 2015 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: --turbo-splitting
 
 function module(stdlib, foreign, heap) {
     "use asm";
     function foo(i) {
+      i = i|0;
       var j = 0;
-      i = i|0;
-      if (i < 0) {
+      if ((i | 0) < 0) {
         j = i+1|0;
       }
-      if (i > 0) {
+      if ((i | 0) > 0) {
         j = i+1|0;
       }
-      return j;
+      return j | 0;
     }
     return { foo: foo };
 }
 
 var foo = module(this, {}, new ArrayBuffer(64*1024)).foo;
 assertEquals(0, foo(0));
 assertEquals(0, foo(-1));
 assertEquals(12, foo(11));