flang/test/Semantics/OpenMP/atomic.f90

! RUN: %python %S/../test_errors.py %s %flang -fopenmp
use omp_lib
! Check OpenMP 2.13.6 atomic Construct

  a = 1.0
  !$omp parallel num_threads(4)
  !$omp atomic seq_cst, read
  b = a

  !$omp atomic seq_cst write
  a = b
  !$omp end atomic

  !$omp atomic read acquire hint(OMP_LOCK_HINT_CONTENDED)
  a = b

  !$omp atomic release hint(OMP_LOCK_HINT_UNCONTENDED) write
  a = b

  !$omp atomic capture seq_cst
  b = a
  a = a + 1
  !$omp end atomic

  !$omp atomic hint(1) acq_rel capture
  b = a
  a = a + 1
  !$omp end atomic

  !ERROR: expected end of line
  !$omp atomic read write
  a = a + 1

  !$omp atomic
  a = a + 1
  !ERROR: expected 'UPDATE'
  !ERROR: expected 'WRITE'
  !ERROR: expected 'COMPARE'
  !ERROR: expected 'CAPTURE'
  !ERROR: expected 'READ'
  !$omp atomic num_threads(4)
  a = a + 1

  !ERROR: expected end of line
  !$omp atomic capture num_threads(4)
  a = a + 1

  !$omp atomic relaxed
  a = a + 1

  !ERROR: expected 'UPDATE'
  !ERROR: expected 'WRITE'
  !ERROR: expected 'COMPARE'
  !ERROR: expected 'CAPTURE'
  !ERROR: expected 'READ'
  !$omp atomic num_threads write
  a = a + 1

  !$omp end parallel
end