2425885552
Bug: v8:8801,v8:8394,v8:9183 Change-Id: I5ceaf731a1b2720f086e6791fe08caaaa55de030 Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1662568 Commit-Queue: Ross McIlroy <rmcilroy@chromium.org> Commit-Queue: Mythri Alle <mythria@chromium.org> Reviewed-by: Mythri Alle <mythria@chromium.org> Auto-Submit: Ross McIlroy <rmcilroy@chromium.org> Cr-Commit-Position: refs/heads/master@{#62224}
96 lines
2.6 KiB
JavaScript
96 lines
2.6 KiB
JavaScript
// Copyright 2019 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Flags: --allow-natives-syntax
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function test(func, expect) {
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%PrepareFunctionForOptimization(func);
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assertTrue(func() == expect);
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%OptimizeFunctionOnNextCall(func);
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assertTrue(func() == expect);
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}
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// Check loading a constant off the global.
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var v0 = 10;
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function check_v0() { return "v0" in this; }
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test(check_v0, true);
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// make it non-constant.
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v0 = 0;
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test(check_v0, true);
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// test a missing value.
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function check_v1() { return "v1" in this; }
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test(check_v1, false);
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this.v1 = 3;
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test(check_v1, true);
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delete this.v1;
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test(check_v1, false);
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// test undefined.
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var v2;
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function check_v2() { return "v2" in this; }
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test(check_v2, true);
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// test a constant object.
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var v3 = {};
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function check_v3() { return "v3" in this; }
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test(check_v3, true);
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// make the object non-constant.
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v3 = [];
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test(check_v3, true);
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// test non-configurable
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Object.defineProperty(this, "v4", { value: {}, configurable: false});
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function check_v4() { return "v4" in this; }
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test(check_v4, true);
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// Test loading from arrays with different prototypes.
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(function() {
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function testIn(index, array) {
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return index in array;
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}
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%PrepareFunctionForOptimization(testIn);
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let a = [];
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a.__proto__ = [0,1,2];
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a[1] = 3;
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// First load will set IC to Load handle with allow hole to undefined conversion false.
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assertTrue(testIn(0, a));
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// Second load will hit ICMiss when hole is loaded. Seeing the same map twice, the IC will be set megamorphic.
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assertTrue(testIn(0, a));
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%OptimizeFunctionOnNextCall(testIn);
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// Test JIT to ensure proper handling.
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assertTrue(testIn(0, a));
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%ClearFunctionFeedback(testIn);
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%DeoptimizeFunction(testIn);
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%PrepareFunctionForOptimization(testIn);
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// First load will set IC to Load handle with allow hole to undefined conversion false.
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assertTrue(testIn(0, a));
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%OptimizeFunctionOnNextCall(testIn);
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// Test JIT to ensure proper handling if hole is loaded.
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assertTrue(testIn(0, a));
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// Repeat the same testing for access out-of-bounds of the array, but in bounds of it's prototype.
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%ClearFunctionFeedback(testIn);
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%DeoptimizeFunction(testIn);
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%PrepareFunctionForOptimization(testIn);
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assertTrue(testIn(2, a));
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assertTrue(testIn(2, a));
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%OptimizeFunctionOnNextCall(testIn);
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assertTrue(testIn(2, a));
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%ClearFunctionFeedback(testIn);
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%DeoptimizeFunction(testIn);
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%PrepareFunctionForOptimization(testIn);
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assertTrue(testIn(2, a));
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%OptimizeFunctionOnNextCall(testIn);
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assertTrue(testIn(2, a));
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})();
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