re PR c++/63249 ([OpenMP] Spurious »set but not used« warnings when actually used in OpenMP target's array section's lower-bound and length)

	PR c++/63249
	* semantics.c (handle_omp_array_sections_1): Call mark_rvalue_use
	on low_bound and length.

	* g++.dg/gomp/pr63249.C: New test.
	* c-c++-common/gomp/pr63249.c: New test.

2014-09-25  Thomas Schwinge  <thomas@codesourcery.com>

	PR c++/63249
	* c-parser.c (c_parser_omp_variable_list): Call mark_exp_read
	on low_bound and length.

From-SVN: r215580