Upload Kmake

deps/v8/test/mjsunit/field-representation-tracking-clone-object.js

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+// Copyright 2019 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
+
+function foo(o) { return {...o}; }
+
+// Warmup the CloneObjectIC with `o.x` being
+// a HeapObject field.
+var o = {data:null};
+%PrepareFunctionForOptimization(foo);
+foo(o);
+foo(o);
+
+// Now update the field representation of o.x
+// in-place from HeapObject to Tagged and make
+// sure that this is handled properly in the
+// fast-path for CloneObjectIC.
+o.data = 1;
+assertEquals(1, %GetProperty(foo(o), "data"));