1// Copyright 2013 the V8 project authors. All rights reserved.
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27
28// Flags: --allow-natives-syntax --load-elimination
29
30// Test local load elimination of redundant loads and stores.
31
32function B(x, y) {
33  this.x = x;
34  this.y = y;
35  return this;
36}
37
38function test_params1(a, b) {
39  var i = a.x;
40  var j = a.x;
41  var k = b.x;
42  var l = b.x;
43  return i + j + k + l;
44}
45
46assertEquals(14, test_params1(new B(3, 4), new B(4, 5)));
47assertEquals(110, test_params1(new B(11, 7), new B(44, 8)));
48
49%OptimizeFunctionOnNextCall(test_params1);
50
51assertEquals(6, test_params1(new B(1, 7), new B(2, 8)));
52
53function test_params2(a, b) {
54  var o = new B(a + 1, b);
55  o.x = a;
56  var i = o.x;
57  o.x = a;
58  var j = o.x;
59  o.x = b;
60  var k = o.x;
61  o.x = b;
62  var l = o.x;
63  return i + j + k + l;
64}
65
66assertEquals(14, test_params2(3, 4));
67assertEquals(110, test_params2(11, 44));
68
69%OptimizeFunctionOnNextCall(test_params2);
70
71assertEquals(6, test_params2(1, 2));
72