[PATCH] D140993: [DAGCombine] fold (sext (sext_inreg x)) -> (sext (trunc x))

[Simon Pilgrim via Phabricator via llvm-commits]

RKSimon added a comment.

I'm a bit worried this will end up fighting the existing "(sext (truncate x)) -> (sextinreg x)" fold


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  rG LLVM Github Monorepo

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  https://reviews.llvm.org/D140993/new/

https://reviews.llvm.org/D140993