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

[Matteo Favaro via Phabricator via llvm-commits]

fvrmatteo added a comment.

I reduced the bit-width to i8 and the same issue is happening when I only disable the `if (!I->hasOneUse()) return false;` line from **canEvaluateShifted**. Is there a chance that disabling the check is not sufficient but that would actually require more changes?

Attached you can find the narrowed down test case executed with the disabled line and its debug output.F12425130: instcombine.log <https://reviews.llvm.org/F12425130>

F12425129: lshr-select-const-i8.ll <https://reviews.llvm.org/F12425129>


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https://reviews.llvm.org/D84664