openmp: Add C/C++ support for loop transformations on inner loops

openmp: Add C/C++ support for loop transformations on inner loops

Add the parsing of loop transformations on inner loops of a loop-nest.

gcc/c/ChangeLog:

	* c-parser.cc (c_parser_omp_nested_loop_transform_clauses):
	Add argument for the level of loop-nest at which the clauses
	appear, ...
	(c_parser_omp_tile): ... adjust use here,
	(c_parser_omp_unroll): ... and here,
	(c_parser_omp_for_loop): ... and here.  Stop treating loop
	transformations like intervening code, parse them, and adjust
	the loop-nest depth if necessary for tiling.

gcc/cp/ChangeLog:

	* parser.cc (cp_parser_is_pragma): New function.
	(cp_parser_omp_nested_loop_transform_clauses):
	Add argument for the level of loop-nest at which the clauses
	appear, ...
	(cp_parser_omp_tile): ... adjust use here,
	(cp_parser_omp_unroll): ... and here,
	(cp_parser_omp_for_loop): ... and here.  Stop treating loop

gcc/testsuite/ChangeLog:

	* c-c++-common/gomp/loop-transforms/unroll-inner-1.c: New test.
	* c-c++-common/gomp/loop-transforms/unroll-inner-2.c: New test.

libgomp/ChangeLog
	* testsuite/libgomp.c++/loop-transforms/tile-1.C: Deleted, replaced by
	matrix-* tests.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-1.h:
	New header file for new tests.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-constant-iter.h:
	Likewise.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-helper.h:
	Likewise.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-no-directive-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-no-directive-unroll-full-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-omp-distribute-parallel-for-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-omp-for-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-omp-parallel-for-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-omp-parallel-masked-taskloop-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-omp-parallel-masked-taskloop-simd-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-omp-target-parallel-for-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-omp-target-teams-distribute-parallel-for-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-omp-taskloop-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-omp-teams-distribute-parallel-for-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-simd-1.c:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/matrix-transform-variants-1.h:
	New test.
	* testsuite/libgomp.c-c++-common/loop-transforms/unroll-non-rect-1.c:
	New test.