33 lines
696 B
JavaScript
33 lines
696 B
JavaScript
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// Copyright 2020 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 --turboprop --dynamic-map-checks --opt
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// Flags: --no-always-opt
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function load(obj){
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return obj.x;
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}
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var o = {x: 10, y:20};
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var o1 = {x:10, y:20, z:30};
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%PrepareFunctionForOptimization(load);
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// polymorphic with same handler
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load(o);
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load(o1);
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%OptimizeFunctionOnNextCall(load);
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load(o);
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load(o1);
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assertOptimized(load);
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var o2 = {y: 10, x:20};
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// deopts but stays optimized
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load(o2);
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assertOptimized(load);
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// deopts and discard code on wrong handler
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load(o2);
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assertUnoptimized(load);
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