20 lines
533 B
JavaScript
20 lines
533 B
JavaScript
|
// 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: --dynamic-map-checks --allow-natives-syntax --opt --no-always-opt
|
||
|
|
|
||
|
|
function f(v) {
|
||
|
|
return v.b;
|
||
|
|
}
|
||
|
|
var v = { a: 10, b: 10.23 };
|
||
|
|
%PrepareFunctionForOptimization(f);
|
||
|
|
f(v);
|
||
|
|
%OptimizeFunctionOnNextCall(f);
|
||
|
|
f(v);
|
||
|
|
assertOptimized(f);
|
||
|
|
v.b = {x: 20};
|
||
|
|
assertEquals(f(v).x, 20);
|
||
|
|
// Must deoptimize because of field-rep changes for field 'b'
|
||
|
|
assertUnoptimized(f);
|