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14fcfef23b
Add specialized debug info metadata nodes that match the `DIDescriptor` wrappers (used by `DIBuilder`) closely. Assembly and bitcode support to follow soon (it'll mostly just be obvious), but this sketches in today's schema. This is the first big commit (well, the only *big* one aside from the testcase changes that'll come when I move this into place) for PR22464. I've marked a bunch of obvious changes as `TODO`s in the source; I plan to make those changes promptly after this hierarchy is moved underneath `DIDescriptor`, but for now I'm aiming mostly to match the status quo. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228640 91177308-0d34-0410-b5e6-96231b3b80d8
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