[PATCH] D104575: AMDGPU: Try to eliminate clearing of high bits of 16-bit instructions

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D104575#2832652 <https://reviews.llvm.org/D104575#2832652>, @foad wrote:

> Looks reasonable to me. I guess there's no way to do this as a DAGCombine instead?

You would need to know exactly how the source node is going to be selected, which you can't know ahead of time We do approximate this for FP instructions already.


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