field-type-tracking.js 4.35 KB
Newer Older
1 2 3 4 5
// 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
6
// Flags: --opt --no-always-opt
7 8 9 10

(function() {
  var o = { text: "Hello World!" };
  function A() {
11 12 13
    // Assign twice to make the field non-constant.
    // TODO(ishell): update test once constant field tracking is done.
    this.a = {text: 'foo'};
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113
    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;
})();

(function() {
  function Foo(x) { this.x = x; }
114 115 116
  // TODO(ishell): update test once constant field tracking is done.
  var f0 = new Foo({x: 0});
  f0.x = {x: 0};  // make Foo.x non-constant here.
117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152
  var f1 = new Foo({x: 1});
  var f2 = new Foo({x: 2});
  var f3 = new Foo({x: 3});
  function readX(f) { return f.x.x; }
  assertEquals(readX(f1), 1);
  assertEquals(readX(f2), 2);
  assertUnoptimized(readX);
  %OptimizeFunctionOnNextCall(readX);
  assertEquals(readX(f3), 3);
  assertOptimized(readX);
  function writeX(f, x) { f.x = x; }
  writeX(f1, {x: 11});
  writeX(f2, {x: 22});
  assertUnoptimized(writeX);
  assertEquals(readX(f1), 11);
  assertEquals(readX(f2), 22);
  assertOptimized(readX);
  %OptimizeFunctionOnNextCall(writeX);
  writeX(f3, {x: 33});
  assertEquals(readX(f3), 33);
  assertOptimized(readX);
  assertOptimized(writeX);
  function addY(f, y) { f.y = y; }
  writeX(f1, {a: "a"});
  assertUnoptimized(readX);
  assertUnoptimized(writeX);
})();

(function() {
  function Narf(x) { this.x = x; }
  var f1 = new Narf(1);
  var f2 = new Narf(2);
  var f3 = new Narf(3);
  function baz(f, y) { f.y = y; }
  baz(f1, {y: 9});
  baz(f2, {y: 9});
153
  baz(f2, {y: 9});
154
  %OptimizeFunctionOnNextCall(baz);
155
  baz(f2, {y: 9});
156 157 158
  baz(f3, {a: -1});
  assertUnoptimized(baz);
})();
159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176

(function() {
  function Foo(x) { this.x = x; this.a = x; }
  function Bar(x) { this.x = x; this.b = x; }
  function readA(o) { return o.x.a; }
  var f = new Foo({a:1});
  var b = new Bar({a:2});
  assertEquals(readA(f), 1);
  assertEquals(readA(b), 2);
  assertEquals(readA(f), 1);
  assertEquals(readA(b), 2);
  %OptimizeFunctionOnNextCall(readA);
  assertEquals(readA(f), 1);
  assertEquals(readA(b), 2);
  assertOptimized(readA);
  f.a.y = 0;
  assertUnoptimized(readA);
})();