— GIMPLE function: gimple gimple_build_omp_single (gimple_seq body, tree clauses)

Build a GIMPLE_OMP_SINGLE statement. BODY is the sequence of statements that will be executed once. CLAUSES are any of the OMP single construct's clauses: private, firstprivate, copyprivate, nowait.

— GIMPLE function: tree gimple_omp_single_clauses (gimple g)

Return the clauses associated with OMP_SINGLE G.

— GIMPLE function: tree *gimple_omp_single_clauses_ptr (gimple g)

Return a pointer to the clauses associated with OMP_SINGLE G.

— GIMPLE function: void gimple_omp_single_set_clauses (gimple g, tree clauses)

Set CLAUSES to be the clauses associated with OMP_SINGLE G.