David Blaikie 40a1b74db6 PR19598: Provide the ability to RAUW a declaration with itself, creating a non-temporary copy and using that to RAUW. ...

Also, provide the ability to create temporary and non-temporary
declarations, as not all declarations may be replaced by definitions
later on.

This provides the necessary infrastructure for Clang to fix PR19598,
leaking temporary MDNodes in Clang's debug info generation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208054 91177308-0d34-0410-b5e6-96231b3b80d8

2014-05-06 03:41:57 +00:00

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