PR target/63679

gcc/:

	* tree-ssa-scopedtables.c (avail_expr_hash): Hash MEM_REF and ARRAY_REF
	using get_ref_base_and_extent.
	(equal_mem_array_ref_p): New.
	(hashable_expr_equal_p): Add call to previous.

gcc/testsuite/:

        * gcc.dg/tree-ssa/ssa-dom-cse-5.c: New.
        * gcc.dg/tree-ssa/ssa-dom-cse-6.c: New.
        * gcc.dg/tree-ssa/ssa-dom-cse-7.c: New.

From-SVN: r232508