gcc/
	* tree-ssa-math-opts.c (is_widening_mult_rhs_p): New function.
	(is_widening_mult_p): Likewise.
	(convert_to_widen): Use them.
	(convert_plusminus_to_widen): Likewise.  Handle fixed-point types as
	well as integer ones.

From-SVN: r162431