2017-09-03  Jeff Law  <law@redhat.com>

	PR tree-optimization/64910
	* tree-ssa-reassoc.c (reassociate_bb): For bitwise binary ops,
	swap the first and last operand if the last is a constant.

	PR tree-optimization/64910
	* gcc.dg/tree-ssa/pr64910-2.c: New test.

From-SVN: r251659