omp-low.c (lower_rec_input_clauses): Force max_vf if is_simd and on privatization clauses OMP_CLAUSE_DECL is...

	* omp-low.c (lower_rec_input_clauses): Force max_vf if is_simd and
	on privatization clauses OMP_CLAUSE_DECL is privatized by reference
	and references a VLA.  Handle references to non-VLAs if is_simd
	all privatization clauses like reductions.
	(lower_rec_input_clauses) <case do_private, case do_firstprivate>:
	If omp_is_reference, use always omp simd arrays and set
	DECL_VALUE_EXPR in that case, if lower_rec_simd_input_clauses
	fails, emit reference initialization.

	* g++.dg/vect/simd-1.cc: New test.

From-SVN: r271947