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This test seems to have largely been relying on asserts being tripped. It had a very specific and somewhat uninteresting grep of the output, but it never really did anything to cause SCEV to be preserved across loop simplify, certainly not explicitly. And a later addition to it actually added CHECK lines despite the test never running FileCheck. Now we actually print SCEV before and after loop simplify to make sure it is *changing* and being *updated*. Which seems to be much more likely the point of the test. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291740 91177308-0d34-0410-b5e6-96231b3b80d8