Don't emit derived-to-base destructor aliases if we don't have a definition
for the base destructor, because aliases to declarations aren't legal.

Fixes PR 6471.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@97637 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed