set *from; /* flow blocks that can send control to this flow block */
set *to; /* flow blocks to which this one can send control */
+ struct pCodeFlow *ancestor; /* The most immediate "single" pCodeFlow object that
+ * executes prior to this one. In many cases, this
+ * will be just the previous */
int inCond; /* Input conditions - stuff assumed defined at entry */
int outCond; /* Output conditions - stuff modified by flow block */