[PATCH] D49954: [InstCombine] Fold Select with Xor condition

[Dávid Bolvanský via Phabricator via llvm-commits]

xbolva00 created this revision.
xbolva00 added a reviewer: lebedev.ri.
Herald added a subscriber: llvm-commits.

Fold

  %A = icmp eq i8 %x, 0
  %B = xor i8 %x, %z
  %C = select i1 %A, i8 %B, i8 %y

To

  %C = select i1 %A, i8 %z, i8 %y

Fixes https://bugs.llvm.org/show_bug.cgi?id=38345
Proof: https://rise4fun.com/Alive/43J


Repository:
  rL LLVM

https://reviews.llvm.org/D49954

Files:
  lib/Transforms/InstCombine/InstCombineSelect.cpp
  test/Transforms/InstCombine/select-xor-icmp.ll

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