tree a3cd0cd5d5faaa143595ce17cee0ec2a66b695c2
parent c4ed5157dc36bb6469ef97e4c044a138866ae5d7
author Steven Perron <stevenperron@google.com> 1656084486 -0400
committer GitHub <noreply@github.com> 1656084486 +0000
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Avoid if-conversion if both predecessors are the same (#4826)

If the predecessor blocks are the same, then there is only 1 value for the
OpPhi.  The simplition pass will simplify it, and it causes problems for
if-conversion.  In these cases, if-conversion can just punt.

Fixes #3554.