Available Expressions Example:An expression,x+y,is available at node n if every path from the entry node to n evaluates x+y,and there are no definitions of x or y after the last evaluation entry .x+y.. x and y not defined .x+y. along blue edges 15Available Expressions • Example: An expression, x+y, is available at node n if every path from the entry node to n evaluates x+y, and there are no definitions of x or y after the last evaluation 15