[InstCombine] Remove explicit code for folding (xor(zext(cmp)), 1) and (xor(sext(cmp)), -1) to ext(!cmp).

As far as I can tell this should be handled by foldCastedBitwiseLogic which is called later in visitXor.

Differential Revision: https://reviews.llvm.org/D36214

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309882 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed