[PATCH] D115480: [InstCombine] Fold icmp of truncated left shift

[Hasyimi Bahrudin via Phabricator via llvm-commits]

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Folds:

- (icmp eq (trunc (shl 1, Y) to i[N]), 0) --> (icmp ugt Y, N-1)
- (icmp ne (trunc (shl 1, Y) to i[N]), 0) --> (icmp ult Y, N)


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D115480

Files:
  llvm/lib/Transforms/InstCombine/InstCombineCompares.cpp
  llvm/test/Transforms/InstCombine/icmp-trunc-shl.ll

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