PR tree-optimization/28411
	* double-int.c (double_int_div): Use double_int_divmod.
	(double_int_divmod, double_int_sdivmod, double_int_udivmod,
	double_int_mod, double_int_smod, double_int_umod): New functions.
	* double-int.h (double_int_divmod, double_int_sdivmod,
	double_int_udivmod, double_int_mod, double_int_smod, double_int_umod):
	Declare.
	* tree-ssa-loop-ivopts.c (constant_multiple_of): Returns the result
	in double_int.
	(get_computation_aff, get_computation_cost_at): Handle double_int
	return type of constant_multiple_of.

From-SVN: r116529