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deps/v8/test/mjsunit/compiler/deopt-lazy-var-mutation.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
+
+var x = 1;
+var y = 1;
+
+function g(a) {
+ x = a;
+ y = a;
+}
+%NeverOptimizeFunction(g);
+
+function foo(a) {
+ g(a);
+ return x + y;
+}
+
+var o = 1;
+%PrepareFunctionForOptimization(foo);
+assertEquals(foo(o), 2);
+assertEquals(foo(o), 2);
+%OptimizeFunctionOnNextCall(foo);
+o = 2;
+assertEquals(foo(o), 4);