[PATCH] D159203: [InstCombine] Fold (A/-B)==(A/B) to (A/B)==0

[Marc Auberer via Phabricator via llvm-commits]

marcauberer created this revision.
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Fixes #62382: https://github.com/llvm/llvm-project/issues/62382

This optimization applies under the precondition, that B is not equal to the minimum
value for the bitwidth of B, e.g. -128 for i8.

Alive2: https://alive2.llvm.org/ce/z/WIiHur
Baseline tests: <insert-test-rev-here>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D159203

Files:
  llvm/include/llvm/Analysis/ValueTracking.h
  llvm/lib/Analysis/ValueTracking.cpp
  llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
  llvm/test/Transforms/InstCombine/icmp-sdiv-sdiv.ll

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