[clang] [Clang][OpenMP] Validate prefer_type fr()/attr() arguments in append_args clause (PR #212307)

[Alexey Bataev via cfe-commits]

https://github.com/alexey-bataev commented:

I think you missed template instantion in SemaTemplateInstantiateDecl.cpp (it silently drops prefer_type) and check ClangAttrEmitter.cpp, need to support PCH

https://github.com/llvm/llvm-project/pull/212307