PR rtl-optimization/28071
	* regmove.c (reg_is_remote_constant_p): Avoid quadratic behaviour.
	(reg_set_in_bb, max_reg_computed): New static variables.
	(regmove_optimize): Free the new array.
	(fixup_match_1): Update call of reg_is_remote_constant_p.

From-SVN: r115765