2013-03-22 Richard Biener <rguenther@suse.de>

2013-03-22  Richard Biener  <rguenther@suse.de>

	* tree-ssa-loop-im.c (memory_references): Add refs_stored_in_loop
	bitmaps.
	(gather_mem_refs_in_loops): Perform store accumulation here.
	(create_vop_ref_mapping_loop): Remove.
	(create_vop_ref_mapping): Likewise.
	(analyze_memory_references): Initialize refs_stored_in_loop.
	(LOOP_DEP_BIT): New define to map to bits in (in)dep_loop
	bitmaps.
	(record_indep_loop): Remove.
	(record_dep_loop): New function.
	(ref_indep_loop_p_1): Adjust to only walk over references
	in the loop, not its subloops.
	(ref_indep_loop_p): Rename to ...
	(ref_indep_loop_p_2): ... this and recurse over the loop tree,
	maintaining a more fine-grained cache.
	(ref_indep_loop_p): Wrap ref_indep_loop_p_2.
	(tree_ssa_lim_finalize): Free refs_stored_in_loop.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@196956 138bc75d-0d04-0410-961f-82ee72b054a4