[Sema] Fix using old initializer during switch statement transformation.
It fixes a crash in CodeGen when we are trying to generate code for
initializer expression created before template instantiation, like
CallExpr '<dependent type>'
|-UnresolvedLookupExpr '<overloaded function type>' lvalue (ADL) = 'parse'
`-DeclRefExpr 'Buffer<N>' lvalue ParmVar 'buffer' 'Buffer<N>'
rdar://problem/33888545
Reviewers: rsmith, ahatanak
Reviewed By: ahatanak
Subscribers: aemerson, kristof.beyls, cfe-commits
Differential Revision: https://reviews.llvm.org/D38009
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@313896 91177308-0d34-0410-b5e6-96231b3b80d8
(cherry picked from commit b46bc42555b1af8974fb686f2e427a86d3d0e088)
2 files changed
