1// Copyright 2013 the V8 project authors. All rights reserved.
2// Redistribution and use in source and binary forms, with or without
3// modification, are permitted provided that the following conditions are
4// met:
5//
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8//     * Redistributions in binary form must reproduce the above
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27// Flags: --allow-natives-syntax
28
29// Test adding undefined from hole in double-holey to string.
30var a = [1.5, , 1.8];
31
32function f(a, i, l) {
33  var v = a[i];
34  return l + v;
35}
36
37assertEquals("test1.5", f(a, 0, "test"));
38assertEquals("test1.5", f(a, 0, "test"));
39%OptimizeFunctionOnNextCall(f);
40assertEquals("testundefined", f(a, 1, "test"));
41
42// Test double-hole going through a phi to a string-add.
43function f2(b, a1, a2) {
44  var v;
45  if (b) {
46    v = a1[0];
47  } else {
48    v = a2[0];
49  }
50  x = v * 2;
51  return "test" + v + x;
52}
53
54f2(true, [1.4,1.8,,1.9], [1.4,1.8,,1.9]);
55f2(true, [1.4,1.8,,1.9], [1.4,1.8,,1.9]);
56f2(false, [1.4,1.8,,1.9], [1.4,1.8,,1.9]);
57f2(false, [1.4,1.8,,1.9], [1.4,1.8,,1.9]);
58%OptimizeFunctionOnNextCall(f2);
59assertEquals("testundefinedNaN", f2(false, [,1.8,,1.9], [,1.9,,1.9]));
60
61// Test converting smi-hole to double-hole.
62function t_smi(a) {
63  a[0] = 1.5;
64}
65
66t_smi([1,,3]);
67t_smi([1,,3]);
68t_smi([1,,3]);
69%OptimizeFunctionOnNextCall(t_smi);
70var ta = [1,,3];
71t_smi(ta);
72ta.__proto__ = [6,6,6];
73assertEquals([1.5,6,3], ta);
74
75// Test converting double-hole to tagged-hole.
76function t(b) {
77  b[1] = {};
78}
79
80t([1.4, 1.6,,1.8, NaN]);
81t([1.4, 1.6,,1.8, NaN]);
82%OptimizeFunctionOnNextCall(t);
83var a = [1.6, 1.8,,1.9, NaN];
84t(a);
85a.__proto__ = [6,6,6,6,6];
86assertEquals([1.6, {}, 6, 1.9, NaN], a);
87