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deps/v8/test/mjsunit/deopt-unlinked.js

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+// Copyright 2017 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 --turbofan --no-always-turbofan
+// The deopt count is stored in the feedback vector which gets cleared when
+// bytecode is flushed, which --gc-interval can cause in stress modes.
+// Flags: --no-flush-bytecode --no-stress-flush-code
+
+function foo() {};
+%PrepareFunctionForOptimization(foo);
+foo();
+foo();
+%OptimizeFunctionOnNextCall(foo);
+foo();
+
+assertOptimized(foo);
+
+// Unlink the function.
+%DeoptimizeFunction(foo);
+
+assertUnoptimized(foo);
+
+foo();
+
+assertUnoptimized(foo);