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When cloning the debug info for a function that hasn't been linked, strip the DIEs from all location attributes that wouldn't contain any meaningful information anyway. This kind of situation can happen when a function got discarded by the linker, but its debug information is still wanted in the final link because it was marked as required as some other DIE dependency. The easiest way to get into that situation is to have using directives. They get linked unconditionally, but their targets might not always be present. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@247386 91177308-0d34-0410-b5e6-96231b3b80d8