[PATCH] D129726: [InstCombine] add a constraint for x <u minSigned --> x >s -1

[Sanjay Patel via Phabricator via llvm-commits]

spatel added a comment.

This will not solve the problem in general. We need to add a fold for lshr values. We should be able to optimize something like this:
https://godbolt.org/z/7Mhdd8dfa
https://alive2.llvm.org/ce/z/3sB6au

Can we generalize or adapt this recent patch?
4f39d8333324bdcf2056


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D129726