2016-08-17  Chung-Lin Tang  <cltang@codesourcery.com>

	* omp-low.c (lower_oacc_reductions): Adjust variable lookup to use
	maybe_lookup_decl, to handle nested acc loop directives.

	testsuite/
	* c-c++-common/goacc/reduction-6.c: New testcase.

From-SVN: r239530