* omp-low.c (lower_rec_input_clauses): For if (0) or simdlen (1) set
	max_vf to 1.
	* omp-expand.c (expand_omp_simd): For if (0) or simdlen (1) clear
	safelen_int and set loop->dont_vectorize.

	* c-c++-common/gomp/simd8.c: New test.

From-SVN: r271270