https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71373
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> --- OMP_CLAUSE_UNIFORM OMP_CLAUSE_INBRANCH OMP_CLAUSE_NOTINBRANCH The above 3 clauses are only allowed in the declare simd directive, so nothing tree-nested.c sees. OMP_CLAUSE__LOOPTEMP_ OMP_CLAUSE__SIMDUID_ These clauses are only added during omp lowering, tree-nested happens before that. OMP_CLAUSE_FOR OMP_CLAUSE_PARALLEL OMP_CLAUSE_SECTIONS OMP_CLAUSE_TASKGROUP These clauses are only allowed on cancel and cancellation point directives, which are at this point already lowered into a function call with numerical value. There is gcc_unreachable, IMHO no need to list them explicitly and doing the same thing as the default, I'm afraid gcc is unable to optimize that.
