v8/test/mjsunit/regress/regress-v8-5255-2.js
bmeurer c9324fe6c5 [turbofan] Fix invalid representation selection for Phis/Selects.
We cannot just blindly make a representation selection for Phi or Select
based on the truncations, but we also need to consider the type of the
inputs (or actually of the Phi/Select node itself). We can only use
Word32 representation based on Word32 truncation if the inputs are
Number or Oddball, same for Float64.

R=epertoso@chromium.org
BUG=v8:5255

Review-Url: https://codereview.chromium.org/2206553002
Cr-Commit-Position: refs/heads/master@{#38241}
2016-08-02 12:11:09 +00:00

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JavaScript

// Copyright 2016 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(x) {
return (x ? true : "7") << 0;
}
assertEquals(1, foo(1));
assertEquals(1, foo(1));
%OptimizeFunctionOnNextCall(foo);
assertEquals(7, foo(0));