Tighten up tests that use -debugify as a shortcut. NFC

These now verify that a given instruction has a specific source
location, rather than any old location. We want to make sure we
propagate the correct locations from one instruction to another.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@356217 91177308-0d34-0410-b5e6-96231b3b80d8
4 files changed