re PR middle-end/79665 (gcc's signed (x*x)/200 is slower than clang's)

re PR middle-end/79665 (gcc's signed (x*x)/200 is slower than clang's)

	PR middle-end/79665
	* internal-fn.c (get_range_pos_neg): Moved to ...
	* tree.c (get_range_pos_neg): ... here.  No longer static.
	* tree.h (get_range_pos_neg): New prototype.
	* expr.c (expand_expr_real_2) <case TRUNC_DIV_EXPR>: If both arguments
	are known to be in between 0 and signed maximum inclusive, try to
	expand both unsigned and signed divmod and use the cheaper one from
	those.

From-SVN: r245676