re PR tree-optimization/49712 (internal compiler error: in gen_lsm_tmp_name, at tree-ssa-loop-im.c:2048)

	PR tree-optimization/49712
	* tree-ssa-loop-im.c (gen_lsm_tmp_name): Handle TARGET_MEM_REF.

	* gcc.c-torture/execute/pr49712.c: New test.

From-SVN: r176195