[PATCH] D88420: [InstCombine] matchRotate - support non-uniform constant vector rotation amounts (PR46895)

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

I did wonder if a ConstantExpr::isUndef() help could be added to return a bool/vectorbool that could be then used to select the 'matching' values (e.g. undef + 1 -> 31 + 1 for i32 rotate).


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