return LHS.first < RHS.first;
}
};
+
+ // Provide DenseMapInfo for unsigned.
+ template<>
+ struct DenseMapInfo<unsigned> {
+ static inline unsigned getEmptyKey() { return (unsigned)-1; }
+ static inline unsigned getTombstoneKey() { return (unsigned)-2; }
+ static unsigned getHashValue(const unsigned Val) {
+ return Val * 37;
+ }
+ static bool isEqual(const unsigned LHS, const unsigned RHS) {
+ return LHS == RHS;
+ }
+ static bool isPod() { return true; }
+ };
class LiveIntervals : public MachineFunctionPass {
MachineFunction* mf_;
typedef std::vector<MachineInstr*> Index2MiMap;
Index2MiMap i2miMap_;
- typedef std::map<unsigned, LiveInterval*> Reg2IntervalMap;
+ typedef DenseMap<unsigned, LiveInterval*> Reg2IntervalMap;
Reg2IntervalMap r2iMap_;
BitVector allocatableRegs_;
LiveInterval &getOrCreateInterval(unsigned reg) {
Reg2IntervalMap::iterator I = r2iMap_.find(reg);
if (I == r2iMap_.end())
- I = r2iMap_.insert(I, std::make_pair(reg, createInterval(reg)));
+ I = r2iMap_.insert(std::make_pair(reg, createInterval(reg))).first;
return *I->second;
}
// Interval removal
void removeInterval(unsigned Reg) {
- std::map<unsigned, LiveInterval*>::iterator I = r2iMap_.find(Reg);
+ DenseMap<unsigned, LiveInterval*>::iterator I = r2iMap_.find(Reg);
delete I->second;
r2iMap_.erase(I);
}
void LiveIntervals::releaseMemory() {
// Free the live intervals themselves.
- for (std::map<unsigned, LiveInterval*>::iterator I = r2iMap_.begin(),
+ for (DenseMap<unsigned, LiveInterval*>::iterator I = r2iMap_.begin(),
E = r2iMap_.end(); I != E; ++I)
delete I->second;