[PATCH] D106335: [flang][OpenMP] Add semantic check for teams nesting

[Peixin Qiao via Phabricator via llvm-commits]

peixin created this revision.
peixin added a project: LLVM.
Herald added subscribers: guansong, yaxunl.
Herald added a reviewer: sscalpone.
peixin requested review of this revision.
Herald added a reviewer: jdoerfert.
Herald added subscribers: llvm-commits, sstefan1.

This patch implements the following check for TEAMS construct:

  OpenMP Version 5.0 Target construct restriction: A teams region can
  only be strictly nested within the implicit parallel region or a target
  region. If a teams construct is nested within a target construct, that
  target construct must contain no statements, declarations or directives
  outside of the teams construct.

Also add one test case for the check.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D106335

Files:
  flang/lib/Semantics/check-directive-structure.h
  flang/lib/Semantics/check-omp-structure.cpp
  flang/lib/Semantics/check-omp-structure.h
  flang/test/Semantics/omp-teams01.f90

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