[PATCH] D107639: [AMDGPU][GISel] Smaller code for scalar 32 to 64-bit extensions

[Matt Arsenault via Phabricator via llvm-commits]

arsenm added a comment.

In D107639#3924314 <https://reviews.llvm.org/D107639#3924314>, @foad wrote:

> Do you still think this should be done as a post-regbankselect combine instead? I really have no idea.

I do think that could potentially enable other combines, but I'm not sure it needs to be exclusionary to also doing it in selection


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