[PATCH] D148509: [BranchFolder] Skip redundant IMPLICIT_DEFs of subregs

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D148509#4283200 <https://reviews.llvm.org/D148509#4283200>, @foad wrote:

> In D148509#4277337 <https://reviews.llvm.org/D148509#4277337>, @arsenm wrote:
>
>> This is another place that should be converted to use regunits. We'd then have to go backwards from live reg units to covering registers
>
> Wouldn't it be better to convert basic block liveins to use regunits first, so that there would be no need to go backwards?

Yes, that's another project I've wanted to complete


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https://reviews.llvm.org/D148509