-- setCC of FP type used by a Phi: have to save in reg.
-- setNE of FP type used by a branch: cannot use result directly in branch!
-- setCC used outside the same basic block: have to save in reg. for now
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@6382 91177308-0d34-0410-b5e6-96231b3b80d8
