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sourceRevisionAtLastExport: 33f2fb0e53d135f0ee17cfccd9d993eb2a6f47de targetRevisionAtLastExport: 31340cbd9add103f586d501b0c3354b7b182abc0
91 lines
3.2 KiB
JavaScript
91 lines
3.2 KiB
JavaScript
// Copyright 2012 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --allow-natives-syntax
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// Test that inlined object allocation works for different layouts of
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// objects (e.g. in object properties, slack tracking in progress or
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// changing of function prototypes)
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function test_helper(construct, a, b) {
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return new construct(a, b);
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}
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function test(construct) {
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%DeoptimizeFunction(test);
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test_helper(construct, 0, 0);
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test_helper(construct, 0, 0);
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%OptimizeFunctionOnNextCall(test_helper);
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// Test adding a new property after allocation was inlined.
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var o = test_helper(construct, 1, 2);
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o.z = 3;
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assertEquals(1, o.x);
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assertEquals(2, o.y);
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assertEquals(3, o.z);
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// Test changing the prototype after allocation was inlined.
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construct.prototype = { z:6 };
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var o = test_helper(construct, 4, 5);
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assertEquals(4, o.x);
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assertEquals(5, o.y);
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assertEquals(6, o.z);
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%DeoptimizeFunction(test_helper);
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%ClearFunctionFeedback(test_helper);
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}
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function finalize_slack_tracking(construct) {
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// Value chosen based on kGenerousAllocationCount = 8.
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for (var i = 0; i < 8; i++) {
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new construct(0, 0);
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}
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}
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// Both properties are pre-allocated in object properties.
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function ConstructInObjectPreAllocated(a, b) {
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this.x = a;
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this.y = b;
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}
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finalize_slack_tracking(ConstructInObjectPreAllocated);
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test(ConstructInObjectPreAllocated);
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// Both properties are unused in object properties.
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function ConstructInObjectUnused(a, b) {
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this.x = a < 0 ? 0 : a;
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this.y = b > 0 ? b : 0;
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}
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finalize_slack_tracking(ConstructInObjectUnused);
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test(ConstructInObjectUnused);
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// Test inlined allocation while slack tracking is still in progress.
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function ConstructWhileSlackTracking(a, b) {
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this.x = a;
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this.y = b;
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}
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test(ConstructWhileSlackTracking);
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