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62e3e389b9
Pervasively use the types provided by the debug info hierarchy rather than `MDNode` in `LexicalScopes`. I noticed (again, I guess, based on comments in the implementation?) that `DILexicalBlockFile::getScope()` returns something different from `DILexicalBlockFile::getContext()`. I created a local helper for getting the same logic from `MDLexicalBlockFile` called `getScopeOfScope()`. I still don't really understand it, but I've added some FIXMEs and I'll come back to it (I suspect the way we encode these objects isn't really ideal). Note that my previous commit r233610 accidentally changed behaviour in `findLexicalScope()` -- it transitioned from a call to `DILexicalBlockFile::getScope()` to `MDLexicalBlockFile::getScope()` (sounds right, doesn't it?) -- so I've fixed that as a drive-by. No tests failed with my error, so it looks like we're missing some coverage here... when I come back to understand the logic, I'll see if I can add some. Other than the fix to `findLexicalScope()`, no functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233640 91177308-0d34-0410-b5e6-96231b3b80d8