[PATCH] D64946: [AMDGPU] Fix trivial PHI into SI_END_CF.

[Stanislav Mekhanoshin via Phabricator via llvm-commits]

rampitec added a comment.

In D64946#1593334 <https://reviews.llvm.org/D64946#1593334>, @nhaehnle wrote:

> How about the following simpler logic:
>
> - if the PHI is used by any basic-block prologue instruction (except other PHIs), then insert the COPY at the top of the basic block
> - otherwise, insert the COPY after the basic-block prologue


In this case COPY in the prologue also shall be marked as prologue instruction somehow.


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https://reviews.llvm.org/D64946