Revert "Track field types."

test/mjsunit/field-type-tracking.js

-// Copyright 2014 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 --nostress-opt --track-field-types
-
-(function() {
-  var o = { text: "Hello World!" };
-  function A() {
-    this.a = o;
-  }
-  function readA(x) {
-    return x.a;
-  }
-  var a = new A();
-  assertUnoptimized(readA);
-  readA(a); readA(a); readA(a);
-  %OptimizeFunctionOnNextCall(readA);
-  assertEquals(readA(a), o);
-  assertOptimized(readA);
-
-  var b = new A();
-  b.b = o;
-  assertEquals(readA(b), o);
-  assertUnoptimized(readA);
-  %OptimizeFunctionOnNextCall(readA);
-  assertEquals(readA(a), o);
-  assertOptimized(readA);
-  assertEquals(readA(a), o);
-  assertEquals(readA(b), o);
-  assertOptimized(readA);
-
-  function readAFromB(x) {
-    return x.a;
-  }
-  assertUnoptimized(readAFromB);
-  readAFromB(b); readAFromB(b); readAFromB(b);
-  %OptimizeFunctionOnNextCall(readAFromB);
-  assertEquals(readAFromB(b), o);
-  assertOptimized(readAFromB);
-
-  var c = new A();
-  c.c = o;
-  assertOptimized(readA);
-  assertOptimized(readAFromB);
-  c.a = [1];
-  assertUnoptimized(readA);
-  assertUnoptimized(readAFromB);
-  assertEquals(readA(a), o);
-  assertEquals(readA(b), o);
-  assertEquals(readA(c), [1]);
-  assertEquals(readAFromB(b), o);
-
-  %OptimizeFunctionOnNextCall(readA);
-  assertEquals(readA(a), o);
-  %OptimizeFunctionOnNextCall(readAFromB);
-  assertEquals(readAFromB(b), o);
-  assertOptimized(readA);
-  a.a = [1];
-  assertEquals(readA(a), [1]);
-  assertEquals(readA(b), o);
-  assertEquals(readA(c), [1]);
-  assertOptimized(readA);
-  b.a = [1];
-  assertEquals(readA(a), [1]);
-  assertEquals(readA(b), [1]);
-  assertEquals(readA(c), [1]);
-  assertOptimized(readA);
-  assertOptimized(readAFromB);
-})();
-
-(function() {
-  function A() { this.x = 0; }
-  A.prototype = {y: 20};
-  function B(o) { return o.a.y; }
-  function C() { this.a = new A(); }
-
-  B(new C());
-  B(new C());
-  %OptimizeFunctionOnNextCall(B);
-  var c = new C();
-  assertEquals(20, B(c));
-  assertOptimized(B);
-  c.a.y = 10;
-  assertEquals(10, B(c));
-  assertUnoptimized(B);
-
-  var c = new C();
-  %OptimizeFunctionOnNextCall(B);
-  assertEquals(20, B(c));
-  assertOptimized(B);
-  c.a.y = 30;
-  assertEquals(30, B(c));
-  assertOptimized(B);
-})();
-
-(function() {
-  var x = new Object();
-  x.a = 1 + "Long string that results in a cons string";
-  x = JSON.parse('{"a":"Short"}');
-})();
-
-(function() {
-  var x = {y: {z: 1}};
-  x.y.z = 1.1;
-})();