[DAGCombiner] remove redundant code and add comments; NFCI
authorSanjay Patel <spatel@rotateright.com>
Fri, 31 Mar 2017 18:18:58 +0000 (18:18 +0000)
committerSanjay Patel <spatel@rotateright.com>
Fri, 31 Mar 2017 18:18:58 +0000 (18:18 +0000)
commit61d3409535c51434ca8b741aafdd5ea1641ecd33
tree1b1ba1bfffd4a4c99a60d0dd7f9049e3a58eae70
parent2aba753e843271a0cae9702a70793c05f64e04de
[DAGCombiner] remove redundant code and add comments; NFCI

llvm-svn: 299241
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp