tree-flow.h (struct omp_region): Move to omp-low.c.

	* tree-flow.h (struct omp_region): Move to omp-low.c.
	Remove omp_ prototypes and variables.
	* gimple.h (omp_reduction_init): Move prototype to omp-low.h.
	(copy_var_decl): Relocate prototype from tree-flow.h.
	* gimple.c (copy_var_decl): Relocate from omp-low.c.
	* tree.h: Move prototype to omp-low.h.
	* omp-low.h: New File.  Relocate prototypes here.
	* omp-low.c (struct omp_region): Make local here.
	(root_omp_region): Make static.
	(copy_var_decl) Move to gimple.c.
	(new_omp_region): Make static.
	(make_gimple_omp_edges): New.  Refactored from tree-cfg.c make_edges.
	* tree-cfg.c: Include omp-low.h.
	(make_edges): Factor out OMP specific bits to make_gimple_omp_edges.
	* gimplify.c: Include omp-low.h.
	* tree-parloops.c: Likewise.

	c
	* c-parser.c: Include omp-low.h.
	* c-typeck.c: Likewise.

	cp
	* parser.c: Include omp-low.h.
	* semantics.c: Likewise.

	fortran
	* trans-openmp.c: Include omp-low.h.

From-SVN: r203786