[PATCH] D99032: GlobalISel: Add FoldBinOpIntoSelect combine

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D99032#2643254 <https://reviews.llvm.org/D99032#2643254>, @paquette wrote:

> Would it be hard to teach CSEMIRBuilder to handle the missing cases so that you can match top-down from the G_SELECT? It would be nice to avoid maintaining a list of constant-foldable opcodes if possible.

CSEMIRBuilder won't help here, and patterns apply bottom up. Really these are all constant foldable, we just don't handle a handful of them. I don't think it's that important and this could instead use the full list of binary opcodes


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  https://reviews.llvm.org/D99032/new/

https://reviews.llvm.org/D99032