- PhysRegSUOper(SUnit *su, int op): SU(su), OpIdx(op) {}
- };
-
- /// Combine a SparseSet with a 1x1 vector to track physical registers.
- /// The SparseSet allows iterating over the (few) live registers for quickly
- /// comparing against a regmask or clearing the set.
- ///
- /// Storage for the map is allocated once for the pass. The map can be
- /// cleared between scheduling regions without freeing unused entries.
- class Reg2SUnitsMap {
- SparseSet<unsigned> PhysRegSet;
- std::vector<std::vector<PhysRegSUOper> > SUnits;
- public:
- typedef SparseSet<unsigned>::const_iterator const_iterator;
-
- // Allow iteration over register numbers (keys) in the map. If needed, we
- // can provide an iterator over SUnits (values) as well.
- const_iterator reg_begin() const { return PhysRegSet.begin(); }
- const_iterator reg_end() const { return PhysRegSet.end(); }
-
- /// Initialize the map with the number of registers.
- /// If the map is already large enough, no allocation occurs.
- /// For simplicity we expect the map to be empty().
- void setRegLimit(unsigned Limit);
+ PhysRegSUOper(SUnit *su, int op, unsigned R): SU(su), OpIdx(op), Reg(R) {}