[PATCH] D125264: [ConstraintElimination] Simplify ssub(a, b) if a s>b && a s>=0.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: fcloutier, rapidsna, spatel, nikic, reames.
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A first patch to use the reasoning in ConstraintElimination to simplify
sub with overflow to a regular sub, if the operation is guaranteed to
not overflow.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D125264

Files:
  llvm/lib/Transforms/Scalar/ConstraintElimination.cpp
  llvm/test/Transforms/ConstraintElimination/ssub-with-overflow.ll

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