[PATCH] D84664: [InstCombine] Fold shift-select if all the operands are constant

[Matteo Favaro via Phabricator via llvm-commits]

fvrmatteo added a comment.

@lebedev.ri I just realised that obviously narrowing the problem from i64 to i8 will break it. I'll gladly relax the existing optimisation if possible and submit a new patch, but to me it's clear that there's something wrong going on with the i64 optimisation. I'm now trying to compile Alive2 with the trunk version of LLVM, but I would wait for your confirmation on the i64 case (with Alive2 or input values if possible) before updating the current patch.


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https://reviews.llvm.org/D84664