PR tree-optimization/89487
	* tree-loop-distribution.c (has_nonaddressable_dataref_p): New.
	(create_rdg_vertices): Compute has_nonaddressable_dataref_p.
	(distribute_loop): Don't do runtime alias check if there is non-
	addressable data reference.
	* tree-ssa-loop-ivopts.c (may_be_nonaddressable_p): Check if VAR_DECL
	is a register variable.

	* gcc/testsuite/gcc.dg/tree-ssa/pr89487.c: New test.

From-SVN: r269361