[InstCombine] revert r280637 because it causes test failures on an ARM bot

http://lab.llvm.org:8011/builders/clang-cmake-armv7-a15/builds/14952/steps/ninja%20check%201/logs/FAIL%3A%20LLVM%3A%3Aicmp.ll


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@280676 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed