/**
* Add a node to the value graph for every symbolic register.
*
* <p><b>PRECONDITION:</b> register lists are computed and valid
*
* @param ir the governing IR
*/
private void addRegisterNodes(IR ir) {
for (Register reg = ir.regpool.getFirstSymbolicRegister(); reg != null; reg = reg.getNext()) {
findOrCreateVertex(reg);
}
}
