re PR tree-optimization/90450 (Hash function in gather_mem_refs_stmt does not match with mem_ref_hasher::equal)

2019-05-22  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/90450
	* tree-ssa-loop-im.c (struct im_mem_ref): Add ref_decomposed.
	(mem_ref_hasher::equal): Check it.
	(mem_ref_alloc): Initialize it.
	(gather_mem_refs_stmt): Set it.

From-SVN: r271503