inline-construct.js 4.88 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27
// Copyright 2012 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

28
// Flags: --allow-natives-syntax --inline-construct
29 30 31

// Test inlining of constructor calls.

32
function TestInlinedConstructor(constructor, closure) {
33 34
  var result;
  var counter = { value:0 };
35 36
  var noDeopt = { deopt:0 };
  var forceDeopt = { /*empty*/ };
37

38 39
  result = closure(constructor, 11, noDeopt, counter);
  assertEquals(11, result);
40
  assertEquals(1, counter.value);
41

42 43
  result = closure(constructor, 23, noDeopt, counter);
  assertEquals(23, result);
44
  assertEquals(2, counter.value);
45

46
  %OptimizeFunctionOnNextCall(closure);
47 48
  result = closure(constructor, 42, noDeopt, counter);
  assertEquals(42, result);
49
  assertEquals(3, counter.value);
50

51 52
  result = closure(constructor, 127, forceDeopt, counter);
  assertEquals(127, result)
53
  assertEquals(4, counter.value);
54 55 56

  %DeoptimizeFunction(closure);
  %ClearFunctionTypeFeedback(closure);
57
  %ClearFunctionTypeFeedback(constructor);
58 59
}

60 61
function value_context(constructor, val, deopt, counter) {
  var obj = new constructor(val, deopt, counter);
62 63 64
  return obj.x;
}

65 66
function test_context(constructor, val, deopt, counter) {
  if (!new constructor(val, deopt, counter)) {
67
    assertUnreachable("should not happen");
68
  }
69
  return val;
70 71
}

72 73 74
function effect_context(constructor, val, deopt, counter) {
  new constructor(val, deopt, counter);
  return val;
75 76 77 78 79 80
}

function TestInAllContexts(constructor) {
  TestInlinedConstructor(constructor, value_context);
  TestInlinedConstructor(constructor, test_context);
  TestInlinedConstructor(constructor, effect_context);
81 82
}

83 84

// Test constructor returning nothing in all contexts.
85 86 87
function c1(val, deopt, counter) {
  deopt.deopt;
  this.x = val;
88 89
  counter.value++;
}
90
TestInAllContexts(c1);
91 92 93


// Test constructor returning an object in all contexts.
94
function c2(val, deopt, counter) {
95
  var obj = {};
96 97
  deopt.deopt;
  obj.x = val;
98 99 100
  counter.value++;
  return obj;
}
101
TestInAllContexts(c2);
102 103 104


// Test constructor returning a primitive value in all contexts.
105 106 107
function c3(val, deopt, counter) {
  deopt.deopt;
  this.x = val;
108 109 110
  counter.value++;
  return "not an object";
}
111
TestInAllContexts(c3);
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145


// Test constructor called with too many arguments.
function c_too_many(a, b) {
  this.x = a + b;
}
function f_too_many(a, b, c) {
  var obj = new c_too_many(a, b, c);
  return obj.x;
}
assertEquals(23, f_too_many(11, 12, 1));
assertEquals(42, f_too_many(23, 19, 1));
%OptimizeFunctionOnNextCall(f_too_many);
assertEquals(43, f_too_many(1, 42, 1));
assertEquals("foobar", f_too_many("foo", "bar", "baz"))


// Test constructor called with too few arguments.
function c_too_few(a, b) {
  assertSame(undefined, b);
  this.x = a + 1;
}
function f_too_few(a) {
  var obj = new c_too_few(a);
  return obj.x;
}
assertEquals(12, f_too_few(11));
assertEquals(24, f_too_few(23));
%OptimizeFunctionOnNextCall(f_too_few);
assertEquals(2, f_too_few(1));
assertEquals("foo1", f_too_few("foo"))


// Test constructor that cannot be inlined.
146
function c_unsupported_syntax(val, deopt, counter) {
147
  try {
148 149
    deopt.deopt;
    this.x = val;
150 151 152 153 154
    counter.value++;
  } catch(e) {
    throw new Error();
  }
}
155 156 157 158 159
TestInAllContexts(c_unsupported_syntax);


// Regression test: Inlined constructors called as functions do not get their
// implicit receiver object set to undefined, even in strict mode.
160
function c_strict(val, deopt, counter) {
161
  "use strict";
162 163
  deopt.deopt;
  this.x = val;
164
  counter.value++;
165
}
166
TestInAllContexts(c_strict);