v8/test/mjsunit/regress/regress-1237.js

// Copyright 2011 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
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//       with the distribution.
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//
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// Flags: --allow-natives-syntax

// Deoptimization after a conditional expression in an effect context should
// not see the value of the expression.
function observe(x, y) {
  return x;
}
function test(x) {
  return observe(1, (x ? observe(observe.prototype.x) : 'c', x + 1));
};
%PrepareFunctionForOptimization(test);
for (var i = 0; i < 5; ++i) test(0);
%OptimizeFunctionOnNextCall(test);
test(0);

test("a");