llvm-project

d9d2f322 - [flang][OpenMP] Refactor semantic check of SINGLE construct (#204339)

[flang][OpenMP] Refactor semantic check of SINGLE construct (#204339) Extract it into a separate function and simplify the code. Avoid making the distinction between a clause appearing on the "begin" and the "end" directives for the purposes of emitting diagnostic messages. One change in behavior is that using the same list item multiple times in COPYPRIVATE clause(s) is an error regardless of the placement of the clauses. Previously in some cases it was treated as a warning. Part of the motivation is the goal of eliminating explicit definitions of end-directives for directives that are not delimited, e.g. "end single", but not "end declare_variant".