1// Copyright 2012 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//
6//     * Redistributions of source code must retain the above copyright
7//       notice, this list of conditions and the following disclaimer.
8//     * Redistributions in binary form must reproduce the above
9//       copyright notice, this list of conditions and the following
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11//       with the distribution.
12//     * Neither the name of Google Inc. nor the names of its
13//       contributors may be used to endorse or promote products derived
14//       from this software without specific prior written permission.
15//
16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
26// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
28// Flags: --allow-natives-syntax --expose-gc --inline-construct
29
30// Test inlining of constructor calls.
31
32function TestInlinedConstructor(closure) {
33  var result;
34  var counter = { value:0 };
35  result = closure(11, 12, counter);
36  assertEquals(23, result);
37  assertEquals(1, counter.value);
38  result = closure(23, 19, counter);
39  assertEquals(42, result);
40  assertEquals(2, counter.value);
41  %OptimizeFunctionOnNextCall(closure);
42  result = closure(1, 42, counter)
43  assertEquals(43, result);
44  assertEquals(3, counter.value);
45  result = closure("foo", "bar", counter)
46  assertEquals("foobar", result)
47  assertEquals(4, counter.value);
48}
49
50function TestInAllContexts(constructor) {
51  function value_context(a, b, counter) {
52    var obj = new constructor(a, b, counter);
53    return obj.x;
54  }
55  function test_context(a, b, counter) {
56    if (!new constructor(a, b, counter)) {
57      assertUnreachable("should not happen");
58    }
59    return a + b;
60  }
61  function effect_context(a, b, counter) {
62    new constructor(a, b, counter);
63    return a + b;
64  }
65  TestInlinedConstructor(value_context);
66  TestInlinedConstructor(test_context);
67  TestInlinedConstructor(effect_context);
68  %DeoptimizeFunction(value_context);
69  %DeoptimizeFunction(test_context);
70  %DeoptimizeFunction(effect_context);
71  gc();  // Makes V8 forget about type information for *_context.
72}
73
74
75// Test constructor returning nothing in all contexts.
76function c1(a, b, counter) {
77  this.x = a + b;
78  counter.value++;
79}
80TestInAllContexts(c1);
81
82
83// Test constructor returning an object in all contexts.
84function c2(a, b, counter) {
85  var obj = new Object();
86  obj.x = a + b;
87  counter.value++;
88  return obj;
89}
90TestInAllContexts(c2);
91
92
93// Test constructor returning a primitive value in all contexts.
94function c3(a, b, counter) {
95  this.x = a + b;
96  counter.value++;
97  return "not an object";
98}
99TestInAllContexts(c3);
100
101
102// Test constructor called with too many arguments.
103function c_too_many(a, b) {
104  this.x = a + b;
105}
106function f_too_many(a, b, c) {
107  var obj = new c_too_many(a, b, c);
108  return obj.x;
109}
110assertEquals(23, f_too_many(11, 12, 1));
111assertEquals(42, f_too_many(23, 19, 1));
112%OptimizeFunctionOnNextCall(f_too_many);
113assertEquals(43, f_too_many(1, 42, 1));
114assertEquals("foobar", f_too_many("foo", "bar", "baz"))
115
116
117// Test constructor called with too few arguments.
118function c_too_few(a, b) {
119  assertSame(undefined, b);
120  this.x = a + 1;
121}
122function f_too_few(a) {
123  var obj = new c_too_few(a);
124  return obj.x;
125}
126assertEquals(12, f_too_few(11));
127assertEquals(24, f_too_few(23));
128%OptimizeFunctionOnNextCall(f_too_few);
129assertEquals(2, f_too_few(1));
130assertEquals("foo1", f_too_few("foo"))
131
132
133// Test constructor that cannot be inlined.
134function c_unsupported_syntax(a, b, counter) {
135  try {
136    this.x = a + b;
137    counter.value++;
138  } catch(e) {
139    throw new Error();
140  }
141}
142TestInAllContexts(c_unsupported_syntax);
143
144
145// Regression test: Inlined constructors called as functions do not get their
146// implicit receiver object set to undefined, even in strict mode.
147function c_strict(a, b, counter) {
148  "use strict";
149  this.x = a + b;
150  counter.value++;
151}
152TestInAllContexts(c_strict);
153