convert cycle checker to smallptrset, add comments and make it
authorChris Lattner <sabre@nondot.org>
Wed, 24 Feb 2010 21:34:04 +0000 (21:34 +0000)
committerChris Lattner <sabre@nondot.org>
Wed, 24 Feb 2010 21:34:04 +0000 (21:34 +0000)
commit46ca5efdd5b748ba8aa62168f7753cb46b683bc5
treef2c5d3a7c5079f02cff3dba5e3678ac5b056d7ed
parenta1461ccfa0f19b2a81afb401c1d772f751edf7ae
convert cycle checker to smallptrset, add comments and make it
more elegant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97059 91177308-0d34-0410-b5e6-96231b3b80d8
lib/CodeGen/SelectionDAG/SelectionDAG.cpp