[flang] [llvm] [flang-rt] Add PDT LEN parameter support: Concrete type cache (PR #181008)

[via llvm-commits]

tmjbios wrote:

Closing this PR, as the cache approach is not needed due to the guarantee around LEN-dependent members being Automatic. Patching a cache-less approach on top of this PR is just going to make it difficult to follow.

https://github.com/llvm/llvm-project/pull/181008