* tree-core.h (enum omp_clause_code): Add OMP_CLAUSE__SCANTEMP_
	clause.
	* tree.h (OMP_CLAUSE_DECL): Use OMP_CLAUSE__SCANTEMP_ instead of
	OMP_CLAUSE__CONDTEMP_ as range's upper bound.
	(OMP_CLAUSE__SCANTEMP__ALLOC, OMP_CLAUSE__SCANTEMP__CONTROL): Define.
	* tree.c (omp_clause_num_ops, omp_clause_code_name): Add
	OMP_CLAUSE__SCANTEMP_ entry.
	(walk_tree_1): Handle OMP_CLAUSE__SCANTEMP_.
	* tree-pretty-print.c (dump_omp_clause): Likewise.
	* tree-nested.c (convert_nonlocal_omp_clauses,
	convert_local_omp_clauses): Likewise.
	* omp-general.h (struct omp_for_data): Add have_scantemp and
	have_nonctrl_scantemp members.
	* omp-general.c (omp_extract_for_data): Initialize them.
	* omp-low.c (struct omp_context): Add scan_exclusive member.
	(scan_omp_1_stmt): Don't unnecessarily mask gimple_omp_for_kind
	result again with GF_OMP_FOR_KIND_MASK.  Initialize also
	ctx->scan_exclusive.
	(lower_rec_simd_input_clauses): Use ctx->scan_exclusive instead
	of !ctx->scan_inclusive.
	(lower_rec_input_clauses): Simplify gimplification of dtors using
	gimplify_and_add.  For non-is_simd test OMP_CLAUSE_REDUCTION_INSCAN
	rather than rvarp.  Handle OMP_CLAUSE_REDUCTION_INSCAN in worksharing
	loops.  Don't add barrier for reduction_omp_orig_ref if
	ctx->scan_??xclusive.
	(lower_reduction_clauses): Don't do anything for ctx->scan_??xclusive.
	(lower_omp_scan): Use ctx->scan_exclusive instead
	of !ctx->scan_inclusive.  Handle worksharing loops with inscan
	reductions.  Use new_vard != new_var instead of repeated
	omp_is_reference calls.
	(omp_find_scan, lower_omp_for_scan): New functions.
	(lower_omp_for): Call lower_omp_for_scan for worksharing loops with
	inscan reductions.
	* omp-expand.c (expand_omp_scantemp_alloc): New function.
	(expand_omp_for_static_nochunk): Handle fd->have_nonctrl_scantemp
	and fd->have_scantemp.

	* c-c++-common/gomp/scan-3.c (f1): Don't expect a sorry message.
	* c-c++-common/gomp/scan-5.c (foo): Likewise.

	* testsuite/libgomp.c++/scan-1.C: New test.
	* testsuite/libgomp.c++/scan-2.C: New test.
	* testsuite/libgomp.c++/scan-3.C: New test.
	* testsuite/libgomp.c++/scan-4.C: New test.
	* testsuite/libgomp.c++/scan-5.C: New test.
	* testsuite/libgomp.c++/scan-6.C: New test.
	* testsuite/libgomp.c++/scan-7.C: New test.
	* testsuite/libgomp.c++/scan-8.C: New test.
	* testsuite/libgomp.c/scan-1.c: New test.
	* testsuite/libgomp.c/scan-2.c: New test.
	* testsuite/libgomp.c/scan-3.c: New test.
	* testsuite/libgomp.c/scan-4.c: New test.
	* testsuite/libgomp.c/scan-5.c: New test.
	* testsuite/libgomp.c/scan-6.c: New test.
	* testsuite/libgomp.c/scan-7.c: New test.
	* testsuite/libgomp.c/scan-8.c: New test.

From-SVN: r272958