revert r301923 : [InstCombine] don't use DeMorgan's Law on integer constants

There's a clang test that is wrongly using -O1 and failing after this commit.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@301924 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed