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