[all-commits] [llvm/llvm-project] e43b3b: [Flang][OpenMP] Semantic checks for Atomic construct.

[sameeranjoshi via All-commits]

  Branch: refs/heads/master
  Home:   https://github.com/llvm/llvm-project
  Commit: e43b3b08ccd60d63d4c3316859e9fec4cdaeaddd
      https://github.com/llvm/llvm-project/commit/e43b3b08ccd60d63d4c3316859e9fec4cdaeaddd
  Author: sameeran joshi <sameeranjayant.joshi at amd.com>
  Date:   2020-12-14 (Mon, 14 Dec 2020)

  Changed paths:
    M flang/include/flang/Parser/dump-parse-tree.h
    M flang/include/flang/Parser/parse-tree.h
    M flang/lib/Parser/openmp-parsers.cpp
    M flang/lib/Parser/unparse.cpp
    M flang/lib/Semantics/check-omp-structure.cpp
    M flang/lib/Semantics/check-omp-structure.h
    M flang/test/Semantics/omp-atomic.f90
    A flang/test/Semantics/omp-atomic01.f90
    M llvm/include/llvm/Frontend/OpenMP/OMP.td

  Log Message:
  -----------
  [Flang][OpenMP] Semantic checks for Atomic construct.

Patch implements restrictions from 2.17.7  of OpenMP 5.0 standard for atomic Construct. Tests for the same are added.

One of the restriction
`OpenMP constructs may not be encountered during execution of an atomic region.`
Is mentioned in 5.0 standard to be a semantic restriction, but given the stricter nature of parser in F18 it's caught at parsing itself.

This patch is a next patch in series from D88965.

Reviewed By: clementval

Differential Revision: https://reviews.llvm.org/D89583