Method widen

chapter14/src/main/java/com/seaofnodes/simple/node/Node.java:548–556

()

    // If any input is a float, flip to a float-flavored opcode and widen any
    // non-float input.
    public final Node widen() {
        if( !hasFloatInput() ) return this;
        Node flt = copyF();
        if( flt==null ) return this;
        for( int i=1; i<nIns(); i++ )
            flt.setDef(i, in(i)._type instanceof TypeFloat ? in(i) : new ToFloatNode(in(i)).peephole());
        kill();
        return flt;
    }
    private boolean hasFloatInput() {
        for( int i=1; i<nIns(); i++ )
            if( in(i)._type instanceof TypeFloat )