[LLVMbugs] [Bug 23081] New: Port DITypeRef/DIScopeRef/DIRef to the new debug info hierarchy

[bugzilla-daemon at llvm.org]

https://llvm.org/bugs/show_bug.cgi?id=23081

            Bug ID: 23081
           Summary: Port DITypeRef/DIScopeRef/DIRef to the new debug info
                    hierarchy
           Product: libraries
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: Core LLVM classes
          Assignee: unassignedbugs at nondot.org
          Reporter: dexonsmith at apple.com
                CC: aprantl at apple.com, dblaikie at gmail.com,
                    echristo at gmail.com, friss at apple.com,
                    llvmbugs at cs.uiuc.edu
            Blocks: 23080
    Classification: Unclassified

Currently, any field in the debug info hierarchy that can point at an
MDCompositeType returns `Metadata*`, since it could be an MDString or an
MDCompositeType.

We should port the DITypeRef/DIScopeRef/etc. wrappers over so that the factory
functions and accessors are more restrictive and clear.

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