#ifndef LLVM_CODEGEN_CRITICALANTIDEPBREAKER_H
#define LLVM_CODEGEN_CRITICALANTIDEPBREAKER_H
-#include "llvm/CodeGen/AntiDepBreaker.h"
+#include "AntiDepBreaker.h"
+#include "llvm/ADT/BitVector.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/RegisterClassInfo.h"
#include "llvm/CodeGen/ScheduleDAG.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/ADT/BitVector.h"
-#include "llvm/ADT/SmallSet.h"
+#include <map>
namespace llvm {
+class RegisterClassInfo;
+class TargetInstrInfo;
+class TargetRegisterInfo;
+
class CriticalAntiDepBreaker : public AntiDepBreaker {
MachineFunction& MF;
MachineRegisterInfo &MRI;
+ const TargetInstrInfo *TII;
const TargetRegisterInfo *TRI;
+ const RegisterClassInfo &RegClassInfo;
/// AllocatableSet - The set of allocatable registers.
/// We'll be ignoring anti-dependencies on non-allocatable registers,
/// corresponding value is null. If the register is live but used in
/// multiple register classes, the corresponding value is -1 casted to a
/// pointer.
- const TargetRegisterClass *
- Classes[TargetRegisterInfo::FirstVirtualRegister];
+ std::vector<const TargetRegisterClass*> Classes;
- /// RegRegs - Map registers to all their references within a live range.
+ /// RegRefs - Map registers to all their references within a live range.
std::multimap<unsigned, MachineOperand *> RegRefs;
+ typedef std::multimap<unsigned, MachineOperand *>::const_iterator
+ RegRefIter;
/// KillIndices - The index of the most recent kill (proceding bottom-up),
/// or ~0u if the register is not live.
- unsigned KillIndices[TargetRegisterInfo::FirstVirtualRegister];
+ std::vector<unsigned> KillIndices;
/// DefIndices - The index of the most recent complete def (proceding bottom
/// up), or ~0u if the register is live.
- unsigned DefIndices[TargetRegisterInfo::FirstVirtualRegister];
+ std::vector<unsigned> DefIndices;
/// KeepRegs - A set of registers which are live and cannot be changed to
/// break anti-dependencies.
- SmallSet<unsigned, 4> KeepRegs;
+ BitVector KeepRegs;
public:
- CriticalAntiDepBreaker(MachineFunction& MFi);
+ CriticalAntiDepBreaker(MachineFunction& MFi, const RegisterClassInfo&);
~CriticalAntiDepBreaker();
-
+
/// Start - Initialize anti-dep breaking for a new basic block.
void StartBlock(MachineBasicBlock *BB);
- /// BreakAntiDependencies - Identifiy anti-dependencies along the critical path
+ /// BreakAntiDependencies - Identifiy anti-dependencies along the critical
+ /// path
/// of the ScheduleDAG and break them by renaming registers.
///
- unsigned BreakAntiDependencies(std::vector<SUnit>& SUnits,
- MachineBasicBlock::iterator& Begin,
- MachineBasicBlock::iterator& End,
- unsigned InsertPosIndex);
+ unsigned BreakAntiDependencies(const std::vector<SUnit>& SUnits,
+ MachineBasicBlock::iterator Begin,
+ MachineBasicBlock::iterator End,
+ unsigned InsertPosIndex,
+ DbgValueVector &DbgValues);
/// Observe - Update liveness information to account for the current
/// instruction, which will not be scheduled.
private:
void PrescanInstruction(MachineInstr *MI);
void ScanInstruction(MachineInstr *MI, unsigned Count);
- unsigned findSuitableFreeRegister(unsigned AntiDepReg,
+ bool isNewRegClobberedByRefs(RegRefIter RegRefBegin,
+ RegRefIter RegRefEnd,
+ unsigned NewReg);
+ unsigned findSuitableFreeRegister(RegRefIter RegRefBegin,
+ RegRefIter RegRefEnd,
+ unsigned AntiDepReg,
unsigned LastNewReg,
- const TargetRegisterClass *);
+ const TargetRegisterClass *RC);
};
}