[PATCH] D49919: [InstCombine] Fold Select with OR condition

[Dávid Bolvanský via Phabricator via llvm-commits]

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

Fold
 %A = icmp ne i8 %X, %V1
 %B = icmp ne i8 %X, %V2
 %C = or i1 %A, %B
 %D = select i1 %C, i8 %X, i8 %V1
 ret i8 %D
 =>
 ret i8 %X

Fixes https://bugs.llvm.org/show_bug.cgi?id=38334
Proof: https://rise4fun.com/Alive/jB8


Repository:
  rL LLVM

https://reviews.llvm.org/D49919

Files:
  lib/Transforms/InstCombine/InstCombineSelect.cpp
  test/Transforms/InstCombine/select-or-cmp.ll

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