Joe Groff e2dd2ff11f Runtime: Handle synthesized decl "related entity" tags. ...

Clang-importer-synthesized declarations get an extra tag character included in their mangling, which was not being preserved in type context descriptors. This caused runtime lookup for these synthesized types to fail. Fix this by adding the tag information to type context descriptors and teaching the runtime to match it up when fetching metadata by mangled name. Fixes rdar://problem/40878715.

2018-06-28 12:11:12 -07:00

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