Add some more stats for fast isel vs. SelectionDAG, w.r.t lowering function
arguments in entry BBs.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179824 91177308-0d34-0410-b5e6-96231b3b80d8
Don't run expensive -O2 and -O3 in tests.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179825 91177308-0d34-0410-b5e6-96231b3b80d8
Keep coding stanard. Don't use "else if" after "return".


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@179826 91177308-0d34-0410-b5e6-96231b3b80d8