[flang-commits] [flang] [Flang] Add parsing and attribute registration for SIMPLE specifier (PR #161285)

[Eugene Epshteyn via flang-commits]

eugeneepshteyn wrote:

It seems that need to add SIMPLE to `subprogramPrefixAttrs` in Semantics/mod-file.cpp. 

Please also add a test that SIMPLE can be serialized to a module file and could be read from it. See flang/test/Semantics/modfile04.f90 for an example.

https://github.com/llvm/llvm-project/pull/161285