Lay the ground work for resoving PR7047. This doesn't actually fix it because
default arguments to template parameters don't have a DeclContext when
instantiated, and so we can't detect that we're in an instantiation context as
opposed to the definition context. However, it fixes the more commonly-occuring
cases in TMP code that use devolve to this type of tautology after
substitution.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@108044 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed