PR target/40457
	* postreload.c (move2add_use_add2_insn): Use full_costs for
	comparison.
	(move2add_use_add3_insn): Likewise.
	(reload_cse_move2add): Likewise.
	* rtlanal.c (get_full_rtx_cost): New function.
	* rtl.h (struct full_rtx_costs): New.
	(init_costs_to_max, init_costs_to_zero, costs_lt_p,
	costs_add_n_insns): New inline functions.
	(get_full_rtx_cost): Declare.

testsuite/
	PR target/40457
	* gcc.target/arm/pr40457-3.c: New test.

From-SVN: r164732