/**
* End an interval of scratch-ness for a symbolic register.
*
* @param r the symbolic register being moved into scratch
* @param end the instruction before which the scratch interval ends
*/
public void endSymbolicInterval(Register r, Instruction end) {
if (DEBUG) {
System.out.println("endSymbolicInterval " + r + " " + end.scratch);
}
SymbolicInterval i = (SymbolicInterval) pending.get(r);
i.end = end;
pending.remove(i);
}
/**
* Begin a new interval of scratch-ness for a symbolic register.
*
* @param r the symbolic register being moved into scratch
* @param scratch the physical register being used as a scratch
* @param begin the instruction before which the physical register is vacated.
*/
void beginSymbolicInterval(Register r, Register scratch, Instruction begin) {
if (DEBUG) {
System.out.println("beginSymbolicInterval " + r + " " + scratch + " " + begin.scratch);
}
SymbolicInterval i = new SymbolicInterval(r, scratch);
i.begin = begin;
ArrayList<Interval> v = findOrCreateIntervalSet(r);
v.add(i);
pending.put(r, i);
}
