llvm-project

3b9b377f - [Flang] [OpenMP] Add semantic checks for detach clause in task (#119172)

[Flang] [OpenMP] Add semantic checks for detach clause in task (#119172) Fixes: - Add semantic checks along with the tests - Move the detach clause to allowedOnceClauses list in Task construct Restrictions:\ OpenMP 5.0: Task construct - At most one detach clause can appear on the directive. - If a detach clause appears on the directive, then a mergeable clause cannot appear on the same directive. OpenMP 5.2: Detach contruct - If a detach clause appears on a directive, then the encountering task must not be a final task. - A variable that appears in a detach clause cannot appear as a list item on a data-environment attribute clause on the same construct. - A variable that is part of another variable (as an array element or a structure element) cannot appear in a detach clause. - event-handle must not have the POINTER attribute.