Extend template instantiation bug fix (r184503) with fixit test

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@184577 91177308-0d34-0410-b5e6-96231b3b80d8
[NVPTX] Add NVPTX register constraints

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@184578 91177308-0d34-0410-b5e6-96231b3b80d8
Propagate the invalid bit from bases to derived template classes.

Fixes PR16292.

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@184581 91177308-0d34-0410-b5e6-96231b3b80d8