v8/test/mjsunit/object-literal-overwrite.js

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// Copyright 2010 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.
// Flags: --allow-natives-syntax
// Check that constants and computed properties are overwriting each other
// correctly, i.e., the last initializer for any name is stored in the object.
// Tests for the full code generator (if active).
var foo1 = {bar: 6, bar: 7};
var foo2 = {bar: function(a) {}, bar: 7};
var foo3 = {bar: function(a) {}, bar: function(b) {}, bar: 7};
var foo4 = {
bar: function(b) {},
bar: 4,
bar: function() {
return 7;
}
};
var foo5 = {13: function(a) {}, 13: 7};
var foo6 = {14.31: function(a) {}, 14.31: 7};
var foo7 = {15: 6, 15: 7};
function foo8(i) {
var obj = {x: {a: i}, x: 7};
return obj.x;
};
%PrepareFunctionForOptimization(foo8);
;
assertEquals(7, foo1.bar);
assertEquals(7, foo2.bar);
assertEquals(7, foo3.bar);
assertEquals(7, foo4.bar());
assertEquals(7, foo5[13]);
assertEquals(7, foo6[14.31]);
assertEquals(7, foo7[15]);
assertEquals(7, foo8(1));
assertEquals(7, foo8(1));
%OptimizeFunctionOnNextCall(foo8);
assertEquals(7, foo8(1));
// Test for the classic code generator.
function fun(x) {
var inner = {
j: function(x) {
return x;
},
j: 7
};
return inner.j;
}
assertEquals(7, fun(7));
// Check that the initializers of computed properties are executed, even if
// no store instructions are generated for the literals.
var glob1 = 0;
var bar1 = {x: glob1++, x: glob1++, x: glob1++, x: 7};
assertEquals(3, glob1);
var glob2 = 0;
function fun2() {
var r = {y: glob2++, y: glob2++, y: glob2++, y: 7};
return r.y;
}
var y = fun2();
assertEquals(7, y);
assertEquals(3, glob2);
var glob3 = 0;
function fun3() {
var r = {113: glob3++, 113: glob3++, 113: glob3++, 113: 7};
return r[113];
}
var y = fun3();
assertEquals(7, y);
assertEquals(3, glob3);