* tree-ssa-forwprop.c (simplify_bitwise_binary_boolean): New function.
	(simplify_bitwise_binary): Use it to simpify certain binary ops on
	booleans.

	* gcc.dg/tree-ssa/forwprop-28.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@200201 138bc75d-0d04-0410-961f-82ee72b054a4