Add analysis pass to build the refined program structure tree.

Add analysis pass to build the refined program structure tree.

The hash table utility functions are copied and adapted from code
Antoniu contributed.

2010-05-27  Tobias Grosser  <grosser@fim.uni-passau.de>
	    Antoniu Pop  <antoniu.pop@gmail.com>

	* Makefile.in (OBJS-common): Add refined-regions.o.
	(refined-regions.o): New.
	(graphite-scop-detection.o): Use refined-regions.h.
	* graphite-scop-detection.c: Include refined-regions.h
	(build_scops): Also build the refined region tree.
	* refined-regions.c: New. Adds an algorithm to detect refined
	regions.
	(print_refined_region): New.
	(debug_refined_region): New.
	(refined_region_contains_bb_p): New.
	(refined_region_contains_region_p): New.
	(is_common_df): New.
	(struct find_regions_global_data): New.
	(is_region): New.
	(typedef struct bb_bb_def): New.
	(new_bb_bb_def): New.
	(bb_bb_map_hash): New.
	(eq_bb_bb_map): New.
	(find_new_bb): New.
	(bb_reg_def): New.
	(new_bb_reg_def): New.
	(bb_reg_map_hash): New.
	(eq_bb_reg_map): New.
	(find_new_region): New.
	(insert_new_reg): New.
	(insert_new_bb): New.
	(insert_shortcut): New.
	(get_next_postdom): New.
	(create_region): New.
	(find_regions_with_entry): New.
	(find_regions_adc): New.
	(find_regions): New.
	(get_topmost_parent): New.
	(build_regions_tree): New.
	(calculate_region_tree): New.
	(free_region_tree): New.
	* refined-regions.h: New.
	(struct refined_region): New.
	(calculate_region_tree): New.
	(free_region_tree): New.
	(refined_region_contains_bb_p): New.
	(refined_region_contains_region_p): New.
	(print_refined_region): New.
	(debug_refined_region): New.

From-SVN: r163108