Restructure some assertion checking based on post commit feedback by Aaron and Tom.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223150 91177308-0d34-0410-b5e6-96231b3b80d8
R600: Cleanup some tests and add missing testcases

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223151 91177308-0d34-0410-b5e6-96231b3b80d8