This restores the case that was removed by

commit f0e41175
Author: jarin <jarin@chromium.org>
Date:   Tue Jan 5 03:56:04 2016 -0800

    [turbofan] Bidirectional representation inference.

BUG=v8:4667
LOG=n
R=bmeurer@chromium.org

Review URL: https://codereview.chromium.org/1584913003

Cr-Commit-Position: refs/heads/master@{#33292}