re PR tree-optimization/56625 (After if-conversion vectorizer doesn't recognize simil...

re PR tree-optimization/56625 (After if-conversion vectorizer doesn't recognize similar loads)

	PR tree-optimization/56625
	PR tree-optimization/69489
	* tree-data-ref.h (DR_INNERMOST): New macro.
	* tree-if-conv.c (innermost_loop_behavior_hash): New class for
	hashing struct innermost_loop_behavior.
	(ref_DR_map): Remove.
	(innermost_DR_map): New map.
	(baseref_DR_map): Revise comment.
	(hash_memrefs_baserefs_and_store_DRs_read_written_info): Store DR
	to innermost_DR_map accroding to its innermost loop behavior.
	(ifcvt_memrefs_wont_trap): Get DR from innermost_DR_map according
	to its innermost loop behavior.
	(if_convertible_loop_p_1): Remove intialization for ref_DR_map.
	Add initialization for innermost_DR_map.  Record memory reference
	in DR_BASE_ADDRESS if the reference is compound one or it doesn't
	have innermost loop behavior.
	(if_convertible_loop_p): Remove release for ref_DR_map.  Release
	innermost_DR_map.

	gcc/testsuite/ChangeLog
	PR tree-optimization/56625
	PR tree-optimization/69489
	* gcc.dg/vect/pr56625.c: New test.
	* gcc.dg/tree-ssa/ifc-pr69489-1.c: New test.

From-SVN: r235289