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4f72291521
PR-URL: https://github.com/nodejs/node/pull/39945 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Jiawen Geng <technicalcute@gmail.com> Reviewed-By: Matteo Collina <matteo.collina@gmail.com> Reviewed-By: Michael Dawson <midawson@redhat.com>
30 lines
882 B
JavaScript
30 lines
882 B
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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class C {
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bla() {};
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constructor() { %TurbofanStaticAssert(this.bla === bla); }
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}
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const bla = C.prototype.bla;
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function bar(f) { return new f; }
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var CC = C;
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function foo() { return bar(CC); }
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%PrepareFunctionForOptimization(C);
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%PrepareFunctionForOptimization(bla);
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%PrepareFunctionForOptimization(foo);
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%PrepareFunctionForOptimization(bar);
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// Make {this.bla} in C megamorphic
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new class extends C { constructor() { super(); this.a = 1 } }
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new class extends C { constructor() { super(); this.b = 1 } }
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new class extends C { constructor() { super(); this.c = 1 } }
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new class extends C { constructor() { super(); this.d = 1 } }
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foo();
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%OptimizeFunctionForTopTier(foo);
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foo();
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