#ifndef LLVM_CODEGEN_VIRTREGMAP_H
#define LLVM_CODEGEN_VIRTREGMAP_H
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/LiveInterval.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/ADT/BitVector.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/IndexedMap.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallVector.h"
#include <map>
namespace llvm {
class LiveIntervals;
class MachineInstr;
class MachineFunction;
class MachineRegisterInfo;
class TargetInstrInfo;
class TargetRegisterInfo;
class raw_ostream;
class VirtRegMap : public MachineFunctionPass {
public:
enum {
NO_PHYS_REG = 0,
NO_STACK_SLOT = (1L << 30)-1,
MAX_STACK_SLOT = (1L << 18)-1
};
enum ModRef { isRef = 1, isMod = 2, isModRef = 3 };
typedef std::multimap<MachineInstr*,
std::pair<unsigned, ModRef> > MI2VirtMapTy;
private:
MachineRegisterInfo *MRI;
const TargetInstrInfo *TII;
const TargetRegisterInfo *TRI;
MachineFunction *MF;
DenseMap<const TargetRegisterClass*, BitVector> allocatableRCRegs;
IndexedMap<unsigned, VirtReg2IndexFunctor> Virt2PhysMap;
IndexedMap<int, VirtReg2IndexFunctor> Virt2StackSlotMap;
IndexedMap<int, VirtReg2IndexFunctor> Virt2ReMatIdMap;
IndexedMap<unsigned, VirtReg2IndexFunctor> Virt2SplitMap;
IndexedMap<SlotIndex> Virt2SplitKillMap;
IndexedMap<MachineInstr*, VirtReg2IndexFunctor> ReMatMap;
MI2VirtMapTy MI2VirtMap;
std::map<MachineInstr*, std::vector<std::pair<unsigned,bool> > >
SpillPt2VirtMap;
std::map<MachineInstr*, std::vector<unsigned> > RestorePt2VirtMap;
std::map<MachineInstr*, std::vector<unsigned> > EmergencySpillMap;
std::map<const TargetRegisterClass*, int> EmergencySpillSlots;
int ReMatId;
int LowSpillSlot, HighSpillSlot;
SmallVector<SmallPtrSet<MachineInstr*, 4>, 8> SpillSlotToUsesMap;
BitVector ImplicitDefed;
BitVector UnusedRegs;
VirtRegMap(const VirtRegMap&); void operator=(const VirtRegMap&);
public:
static char ID;
VirtRegMap() : MachineFunctionPass(&ID), Virt2PhysMap(NO_PHYS_REG),
Virt2StackSlotMap(NO_STACK_SLOT),
Virt2ReMatIdMap(NO_STACK_SLOT), Virt2SplitMap(0),
Virt2SplitKillMap(SlotIndex()), ReMatMap(NULL),
ReMatId(MAX_STACK_SLOT+1),
LowSpillSlot(NO_STACK_SLOT), HighSpillSlot(NO_STACK_SLOT) { }
virtual bool runOnMachineFunction(MachineFunction &MF);
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesAll();
MachineFunctionPass::getAnalysisUsage(AU);
}
void grow();
bool hasPhys(unsigned virtReg) const {
return getPhys(virtReg) != NO_PHYS_REG;
}
unsigned getPhys(unsigned virtReg) const {
assert(TargetRegisterInfo::isVirtualRegister(virtReg));
return Virt2PhysMap[virtReg];
}
void assignVirt2Phys(unsigned virtReg, unsigned physReg) {
assert(TargetRegisterInfo::isVirtualRegister(virtReg) &&
TargetRegisterInfo::isPhysicalRegister(physReg));
assert(Virt2PhysMap[virtReg] == NO_PHYS_REG &&
"attempt to assign physical register to already mapped "
"virtual register");
Virt2PhysMap[virtReg] = physReg;
}
void clearVirt(unsigned virtReg) {
assert(TargetRegisterInfo::isVirtualRegister(virtReg));
assert(Virt2PhysMap[virtReg] != NO_PHYS_REG &&
"attempt to clear a not assigned virtual register");
Virt2PhysMap[virtReg] = NO_PHYS_REG;
}
void clearAllVirt() {
Virt2PhysMap.clear();
grow();
}
unsigned getRegAllocPref(unsigned virtReg);
void setIsSplitFromReg(unsigned virtReg, unsigned SReg) {
Virt2SplitMap[virtReg] = SReg;
}
unsigned getPreSplitReg(unsigned virtReg) {
return Virt2SplitMap[virtReg];
}
bool isAssignedReg(unsigned virtReg) const {
if (getStackSlot(virtReg) == NO_STACK_SLOT &&
getReMatId(virtReg) == NO_STACK_SLOT)
return true;
return (Virt2SplitMap[virtReg] && Virt2PhysMap[virtReg] != NO_PHYS_REG);
}
int getStackSlot(unsigned virtReg) const {
assert(TargetRegisterInfo::isVirtualRegister(virtReg));
return Virt2StackSlotMap[virtReg];
}
int getReMatId(unsigned virtReg) const {
assert(TargetRegisterInfo::isVirtualRegister(virtReg));
return Virt2ReMatIdMap[virtReg];
}
int assignVirt2StackSlot(unsigned virtReg);
void assignVirt2StackSlot(unsigned virtReg, int frameIndex);
int assignVirtReMatId(unsigned virtReg);
void assignVirtReMatId(unsigned virtReg, int id);
bool isReMaterialized(unsigned virtReg) const {
return ReMatMap[virtReg] != NULL;
}
MachineInstr *getReMaterializedMI(unsigned virtReg) const {
return ReMatMap[virtReg];
}
void setVirtIsReMaterialized(unsigned virtReg, MachineInstr *def) {
ReMatMap[virtReg] = def;
}
void addKillPoint(unsigned virtReg, SlotIndex index) {
Virt2SplitKillMap[virtReg] = index;
}
SlotIndex getKillPoint(unsigned virtReg) const {
return Virt2SplitKillMap[virtReg];
}
void removeKillPoint(unsigned virtReg) {
Virt2SplitKillMap[virtReg] = SlotIndex();
}
bool isSpillPt(MachineInstr *Pt) const {
return SpillPt2VirtMap.find(Pt) != SpillPt2VirtMap.end();
}
std::vector<std::pair<unsigned,bool> > &getSpillPtSpills(MachineInstr *Pt) {
return SpillPt2VirtMap[Pt];
}
void addSpillPoint(unsigned virtReg, bool isKill, MachineInstr *Pt) {
std::map<MachineInstr*, std::vector<std::pair<unsigned,bool> > >::iterator
I = SpillPt2VirtMap.find(Pt);
if (I != SpillPt2VirtMap.end())
I->second.push_back(std::make_pair(virtReg, isKill));
else {
std::vector<std::pair<unsigned,bool> > Virts;
Virts.push_back(std::make_pair(virtReg, isKill));
SpillPt2VirtMap.insert(std::make_pair(Pt, Virts));
}
}
void transferSpillPts(MachineInstr *Old, MachineInstr *New) {
std::map<MachineInstr*, std::vector<std::pair<unsigned,bool> > >::iterator
I = SpillPt2VirtMap.find(Old);
if (I == SpillPt2VirtMap.end())
return;
while (!I->second.empty()) {
unsigned virtReg = I->second.back().first;
bool isKill = I->second.back().second;
I->second.pop_back();
addSpillPoint(virtReg, isKill, New);
}
SpillPt2VirtMap.erase(I);
}
bool isRestorePt(MachineInstr *Pt) const {
return RestorePt2VirtMap.find(Pt) != RestorePt2VirtMap.end();
}
std::vector<unsigned> &getRestorePtRestores(MachineInstr *Pt) {
return RestorePt2VirtMap[Pt];
}
void addRestorePoint(unsigned virtReg, MachineInstr *Pt) {
std::map<MachineInstr*, std::vector<unsigned> >::iterator I =
RestorePt2VirtMap.find(Pt);
if (I != RestorePt2VirtMap.end())
I->second.push_back(virtReg);
else {
std::vector<unsigned> Virts;
Virts.push_back(virtReg);
RestorePt2VirtMap.insert(std::make_pair(Pt, Virts));
}
}
void transferRestorePts(MachineInstr *Old, MachineInstr *New) {
std::map<MachineInstr*, std::vector<unsigned> >::iterator I =
RestorePt2VirtMap.find(Old);
if (I == RestorePt2VirtMap.end())
return;
while (!I->second.empty()) {
unsigned virtReg = I->second.back();
I->second.pop_back();
addRestorePoint(virtReg, New);
}
RestorePt2VirtMap.erase(I);
}
void addEmergencySpill(unsigned PhysReg, MachineInstr *MI) {
if (EmergencySpillMap.find(MI) != EmergencySpillMap.end())
EmergencySpillMap[MI].push_back(PhysReg);
else {
std::vector<unsigned> PhysRegs;
PhysRegs.push_back(PhysReg);
EmergencySpillMap.insert(std::make_pair(MI, PhysRegs));
}
}
bool hasEmergencySpills(MachineInstr *MI) const {
return EmergencySpillMap.find(MI) != EmergencySpillMap.end();
}
std::vector<unsigned> &getEmergencySpills(MachineInstr *MI) {
return EmergencySpillMap[MI];
}
void transferEmergencySpills(MachineInstr *Old, MachineInstr *New) {
std::map<MachineInstr*,std::vector<unsigned> >::iterator I =
EmergencySpillMap.find(Old);
if (I == EmergencySpillMap.end())
return;
while (!I->second.empty()) {
unsigned virtReg = I->second.back();
I->second.pop_back();
addEmergencySpill(virtReg, New);
}
EmergencySpillMap.erase(I);
}
int getEmergencySpillSlot(const TargetRegisterClass *RC);
int getLowSpillSlot() const {
return LowSpillSlot;
}
int getHighSpillSlot() const {
return HighSpillSlot;
}
void addSpillSlotUse(int FrameIndex, MachineInstr *MI);
bool isSpillSlotUsed(int FrameIndex) const {
assert(FrameIndex >= 0 && "Spill slot index should not be negative!");
return !SpillSlotToUsesMap[FrameIndex-LowSpillSlot].empty();
}
void setIsImplicitlyDefined(unsigned VirtReg) {
ImplicitDefed.set(VirtReg-TargetRegisterInfo::FirstVirtualRegister);
}
bool isImplicitlyDefined(unsigned VirtReg) const {
return ImplicitDefed[VirtReg-TargetRegisterInfo::FirstVirtualRegister];
}
void virtFolded(unsigned VirtReg, MachineInstr *OldMI, MachineInstr *NewMI,
ModRef MRInfo);
void virtFolded(unsigned VirtReg, MachineInstr *MI, ModRef MRInfo);
std::pair<MI2VirtMapTy::const_iterator, MI2VirtMapTy::const_iterator>
getFoldedVirts(MachineInstr* MI) const {
return MI2VirtMap.equal_range(MI);
}
void RemoveMachineInstrFromMaps(MachineInstr *MI);
bool FindUnusedRegisters(LiveIntervals* LIs);
bool HasUnusedRegisters() const {
return !UnusedRegs.none();
}
void setRegisterUsed(unsigned Reg) {
UnusedRegs.reset(Reg);
}
bool isRegisterUnused(unsigned Reg) const {
return UnusedRegs[Reg];
}
unsigned getFirstUnusedRegister(const TargetRegisterClass *RC) {
int Reg = UnusedRegs.find_first();
while (Reg != -1) {
if (allocatableRCRegs[RC][Reg])
return (unsigned)Reg;
Reg = UnusedRegs.find_next(Reg);
}
return 0;
}
void print(raw_ostream &OS, const Module* M = 0) const;
void dump() const;
};
inline raw_ostream &operator<<(raw_ostream &OS, const VirtRegMap &VRM) {
VRM.print(OS);
return OS;
}
}
#endif