[PATCH] D136432: [AMDGPU] Combine BFI instructions.
Jay Foad via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Fri Oct 21 08:10:38 PDT 2022
foad added a comment.
> Hmm... creating a plain binary tree is simple enough. Maybe we *should* do that as long as we're here...
I would suggest not doing that. It is not clearly better - it is a tradeoff between latency and register pressure. And I don't think SelectionDAG tries to balance trees in simpler cases, like just nested ANDs or nested ORs.
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https://reviews.llvm.org/D136432/new/
https://reviews.llvm.org/D136432
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