// Copyright 2020 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. // Flags: --allow-natives-syntax --turboprop --dynamic-map-checks --opt // Flags: --no-always-opt function f(o) { return o.b; } var o = {a:10, b:20}; var o1 = {a:10, b:20}; var o2 = {a:10, b:20}; %PrepareFunctionForOptimization(f); f(o); %OptimizeFunctionOnNextCall(f); f(o); assertOptimized(f); %PrepareFunctionForOptimization(f); f(o); // Deprecates O's map. o1.b = 10.23; // Deoptimizes but retains code. f(o1); assertOptimized(f); // Deoptimizes and discards code. f(o); f(o); assertUnoptimized(f); // When we reoptimize we should include code for migrating deprecated maps. %OptimizeFunctionOnNextCall(f); f(o); assertOptimized(f); f(o2); f(o2); assertOptimized(f);