[PATCH] D106450: [InstCombine] Fold (gep (oneuse(gep Ptr, Idx0)), Idx1) -> (gep Ptr, (add Idx0, Idx1)) (PR51069)

[Alexander Kornienko via Phabricator via llvm-commits]

alexfh added subscribers: wmi, alexfh.
alexfh added a comment.

@RKSimon we've discovered that this commit is causing substantial performance regressions (~11% runtime) of some of our benchmarks on different x86 microarchitectures (haswell, skylake). @wmi is trying to get an isolated test.


Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D106450