}
int VirtRegMap::assignVirt2StackSlot(unsigned virtReg) {
- assert(MRegisterInfo::isVirtualRegister(virtReg));
+ assert(TargetRegisterInfo::isVirtualRegister(virtReg));
assert(Virt2StackSlotMap[virtReg] == NO_STACK_SLOT &&
"attempt to assign stack slot to already spilled register");
const TargetRegisterClass* RC = MF.getRegInfo().getRegClass(virtReg);
}
void VirtRegMap::assignVirt2StackSlot(unsigned virtReg, int frameIndex) {
- assert(MRegisterInfo::isVirtualRegister(virtReg));
+ assert(TargetRegisterInfo::isVirtualRegister(virtReg));
assert(Virt2StackSlotMap[virtReg] == NO_STACK_SLOT &&
"attempt to assign stack slot to already spilled register");
assert((frameIndex >= 0 ||
}
int VirtRegMap::assignVirtReMatId(unsigned virtReg) {
- assert(MRegisterInfo::isVirtualRegister(virtReg));
+ assert(TargetRegisterInfo::isVirtualRegister(virtReg));
assert(Virt2ReMatIdMap[virtReg] == NO_STACK_SLOT &&
"attempt to assign re-mat id to already spilled register");
Virt2ReMatIdMap[virtReg] = ReMatId;
}
void VirtRegMap::assignVirtReMatId(unsigned virtReg, int id) {
- assert(MRegisterInfo::isVirtualRegister(virtReg));
+ assert(TargetRegisterInfo::isVirtualRegister(virtReg));
assert(Virt2ReMatIdMap[virtReg] == NO_STACK_SLOT &&
"attempt to assign re-mat id to already spilled register");
Virt2ReMatIdMap[virtReg] = id;
}
void VirtRegMap::print(std::ostream &OS) const {
- const MRegisterInfo* MRI = MF.getTarget().getRegisterInfo();
+ const TargetRegisterInfo* TRI = MF.getTarget().getRegisterInfo();
OS << "********** REGISTER MAP **********\n";
- for (unsigned i = MRegisterInfo::FirstVirtualRegister,
+ for (unsigned i = TargetRegisterInfo::FirstVirtualRegister,
e = MF.getRegInfo().getLastVirtReg(); i <= e; ++i) {
if (Virt2PhysMap[i] != (unsigned)VirtRegMap::NO_PHYS_REG)
- OS << "[reg" << i << " -> " << MRI->getName(Virt2PhysMap[i]) << "]\n";
+ OS << "[reg" << i << " -> " << TRI->getName(Virt2PhysMap[i]) << "]\n";
}
- for (unsigned i = MRegisterInfo::FirstVirtualRegister,
+ for (unsigned i = TargetRegisterInfo::FirstVirtualRegister,
e = MF.getRegInfo().getLastVirtReg(); i <= e; ++i)
if (Virt2StackSlotMap[i] != VirtRegMap::NO_STACK_SLOT)
OS << "[reg" << i << " -> fi#" << Virt2StackSlotMap[i] << "]\n";
MachineInstr &MI = *MII;
for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
MachineOperand &MO = MI.getOperand(i);
- if (MO.isRegister() && MO.getReg())
- if (MRegisterInfo::isVirtualRegister(MO.getReg())) {
+ if (MO.isRegister() && MO.getReg()) {
+ if (TargetRegisterInfo::isVirtualRegister(MO.getReg())) {
unsigned VirtReg = MO.getReg();
unsigned PhysReg = VRM.getPhys(VirtReg);
if (!VRM.isAssignedReg(VirtReg)) {
} else {
MF.getRegInfo().setPhysRegUsed(MO.getReg());
}
+ }
}
DOUT << '\t' << MI;
/// register pressure in other blocks).
class VISIBILITY_HIDDEN LocalSpiller : public Spiller {
MachineRegisterInfo *RegInfo;
- const MRegisterInfo *MRI;
+ const TargetRegisterInfo *TRI;
const TargetInstrInfo *TII;
public:
bool runOnMachineFunction(MachineFunction &MF, VirtRegMap &VRM) {
RegInfo = &MF.getRegInfo();
- MRI = MF.getTarget().getRegisterInfo();
+ TRI = MF.getTarget().getRegisterInfo();
TII = MF.getTarget().getInstrInfo();
DOUT << "\n**** Local spiller rewriting function '"
<< MF.getFunction()->getName() << "':\n";
/// this bit and addAvailable sets it if.
namespace {
class VISIBILITY_HIDDEN AvailableSpills {
- const MRegisterInfo *MRI;
+ const TargetRegisterInfo *TRI;
const TargetInstrInfo *TII;
// SpillSlotsOrReMatsAvailable - This map keeps track of all of the spilled
void ClobberPhysRegOnly(unsigned PhysReg);
public:
- AvailableSpills(const MRegisterInfo *mri, const TargetInstrInfo *tii)
- : MRI(mri), TII(tii) {
+ AvailableSpills(const TargetRegisterInfo *tri, const TargetInstrInfo *tii)
+ : TRI(tri), TII(tii) {
}
- const MRegisterInfo *getRegInfo() const { return MRI; }
+ const TargetRegisterInfo *getRegInfo() const { return TRI; }
/// getSpillSlotOrReMatPhysReg - If the specified stack slot or remat is
/// available in a physical register, return that PhysReg, otherwise
DOUT << "Remembering RM#" << SlotOrReMat-VirtRegMap::MAX_STACK_SLOT-1;
else
DOUT << "Remembering SS#" << SlotOrReMat;
- DOUT << " in physreg " << MRI->getName(Reg) << "\n";
+ DOUT << " in physreg " << TRI->getName(Reg) << "\n";
}
/// canClobberPhysReg - Return true if the spiller is allowed to change the
assert((SpillSlotsOrReMatsAvailable[SlotOrReMat] >> 1) == PhysReg &&
"Bidirectional map mismatch!");
SpillSlotsOrReMatsAvailable[SlotOrReMat] &= ~1;
- DOUT << "PhysReg " << MRI->getName(PhysReg)
+ DOUT << "PhysReg " << TRI->getName(PhysReg)
<< " copied, it is available for use but can no longer be modified\n";
}
}
/// stackslot register and its aliases. The register and its aliases may
/// still available but is no longer allowed to be modifed.
void AvailableSpills::disallowClobberPhysReg(unsigned PhysReg) {
- for (const unsigned *AS = MRI->getAliasSet(PhysReg); *AS; ++AS)
+ for (const unsigned *AS = TRI->getAliasSet(PhysReg); *AS; ++AS)
disallowClobberPhysRegOnly(*AS);
disallowClobberPhysRegOnly(PhysReg);
}
assert((SpillSlotsOrReMatsAvailable[SlotOrReMat] >> 1) == PhysReg &&
"Bidirectional map mismatch!");
SpillSlotsOrReMatsAvailable.erase(SlotOrReMat);
- DOUT << "PhysReg " << MRI->getName(PhysReg)
+ DOUT << "PhysReg " << TRI->getName(PhysReg)
<< " clobbered, invalidating ";
if (SlotOrReMat > VirtRegMap::MAX_STACK_SLOT)
DOUT << "RM#" << SlotOrReMat-VirtRegMap::MAX_STACK_SLOT-1 << "\n";
/// value. We use this to invalidate any info about stuff we thing lives in
/// it and any of its aliases.
void AvailableSpills::ClobberPhysReg(unsigned PhysReg) {
- for (const unsigned *AS = MRI->getAliasSet(PhysReg); *AS; ++AS)
+ for (const unsigned *AS = TRI->getAliasSet(PhysReg); *AS; ++AS)
ClobberPhysRegOnly(*AS);
ClobberPhysRegOnly(PhysReg);
}
/// over.
static void UpdateKills(MachineInstr &MI, BitVector &RegKills,
std::vector<MachineOperand*> &KillOps) {
- const TargetInstrDescriptor *TID = MI.getDesc();
+ const TargetInstrDesc &TID = MI.getDesc();
for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
MachineOperand &MO = MI.getOperand(i);
if (!MO.isRegister() || !MO.isUse())
KillOps[Reg]->setIsKill(false);
KillOps[Reg] = NULL;
RegKills.reset(Reg);
- if (i < TID->getNumOperands() &&
- TID->getOperandConstraint(i, TOI::TIED_TO) == -1)
+ if (i < TID.getNumOperands() &&
+ TID.getOperandConstraint(i, TOI::TIED_TO) == -1)
// Unless it's a two-address operand, this is the new kill.
MO.setIsKill();
}
}
}
+/// ReMaterialize - Re-materialize definition for Reg targetting DestReg.
+///
+static void ReMaterialize(MachineBasicBlock &MBB,
+ MachineBasicBlock::iterator &MII,
+ unsigned DestReg, unsigned Reg,
+ const TargetRegisterInfo *TRI,
+ VirtRegMap &VRM) {
+ TRI->reMaterialize(MBB, MII, DestReg, VRM.getReMaterializedMI(Reg));
+ MachineInstr *NewMI = prior(MII);
+ for (unsigned i = 0, e = NewMI->getNumOperands(); i != e; ++i) {
+ MachineOperand &MO = NewMI->getOperand(i);
+ if (!MO.isRegister() || MO.getReg() == 0)
+ continue;
+ unsigned VirtReg = MO.getReg();
+ if (TargetRegisterInfo::isPhysicalRegister(VirtReg))
+ continue;
+ assert(MO.isUse());
+ unsigned SubIdx = MO.getSubReg();
+ unsigned Phys = VRM.getPhys(VirtReg);
+ assert(Phys);
+ unsigned RReg = SubIdx ? TRI->getSubReg(Phys, SubIdx) : Phys;
+ MO.setReg(RReg);
+ }
+ ++NumReMats;
+}
+
// ReusedOp - For each reused operand, we keep track of a bit of information, in
// case we need to rollback upon processing a new operand. See comments below.
std::vector<ReusedOp> Reuses;
BitVector PhysRegsClobbered;
public:
- ReuseInfo(MachineInstr &mi, const MRegisterInfo *mri) : MI(mi) {
- PhysRegsClobbered.resize(mri->getNumRegs());
+ ReuseInfo(MachineInstr &mi, const TargetRegisterInfo *tri) : MI(mi) {
+ PhysRegsClobbered.resize(tri->getNumRegs());
}
bool hasReuses() const {
// value aliases the new register. If so, codegen the previous reload
// and use this one.
unsigned PRRU = Op.PhysRegReused;
- const MRegisterInfo *MRI = Spills.getRegInfo();
- if (MRI->areAliases(PRRU, PhysReg)) {
+ const TargetRegisterInfo *TRI = Spills.getRegInfo();
+ if (TRI->areAliases(PRRU, PhysReg)) {
// Okay, we found out that an alias of a reused register
// was used. This isn't good because it means we have
// to undo a previous reuse.
MI, Spills, MaybeDeadStores,
Rejected, RegKills, KillOps, VRM);
+ MachineBasicBlock::iterator MII = MI;
if (NewOp.StackSlotOrReMat > VirtRegMap::MAX_STACK_SLOT) {
- MRI->reMaterialize(*MBB, MI, NewPhysReg,
- VRM.getReMaterializedMI(NewOp.VirtReg));
- ++NumReMats;
+ ReMaterialize(*MBB, MII, NewPhysReg, NewOp.VirtReg, TRI, VRM);
} else {
- TII->loadRegFromStackSlot(*MBB, MI, NewPhysReg,
+ TII->loadRegFromStackSlot(*MBB, MII, NewPhysReg,
NewOp.StackSlotOrReMat, AliasRC);
// Any stores to this stack slot are not dead anymore.
MaybeDeadStores[NewOp.StackSlotOrReMat] = NULL;
MI->getOperand(NewOp.Operand).setReg(NewPhysReg);
Spills.addAvailable(NewOp.StackSlotOrReMat, MI, NewPhysReg);
- MachineBasicBlock::iterator MII = MI;
--MII;
UpdateKills(*MII, RegKills, KillOps);
DOUT << '\t' << *MII;
/// xorl %edi, %eax
/// movl %eax, -32(%ebp)
/// movl -36(%ebp), %eax
-/// orl %eax, -32(%ebp)
+/// orl %eax, -32(%ebp)
/// ==>
/// xorl %edi, %eax
/// orl -36(%ebp), %eax
if (!MO.isRegister() || MO.getReg() == 0 || !MO.isUse())
continue;
unsigned VirtReg = MO.getReg();
- if (MRegisterInfo::isPhysicalRegister(VirtReg) || MO.getSubReg())
+ if (TargetRegisterInfo::isPhysicalRegister(VirtReg) || MO.getSubReg())
continue;
if (VRM.isAssignedReg(VirtReg)) {
unsigned PhysReg = VRM.getPhys(VirtReg);
- if (PhysReg && MRI->regsOverlap(PhysReg, UnfoldPR))
+ if (PhysReg && TRI->regsOverlap(PhysReg, UnfoldPR))
return false;
} else if (VRM.isReMaterialized(VirtReg))
continue;
int SS = VRM.getStackSlot(VirtReg);
unsigned PhysReg = Spills.getSpillSlotOrReMatPhysReg(SS);
if (PhysReg) {
- if (MRI->regsOverlap(PhysReg, UnfoldPR))
+ if (TRI->regsOverlap(PhysReg, UnfoldPR))
return false;
continue;
}
PhysReg = VRM.getPhys(VirtReg);
- if (!MRI->regsOverlap(PhysReg, UnfoldPR))
+ if (!TRI->regsOverlap(PhysReg, UnfoldPR))
continue;
// Ok, we'll need to reload the value into a register which makes
assert(Idx != -1);
SmallVector<unsigned, 2> Ops;
Ops.push_back(Idx);
- MachineInstr *FoldedMI = TII->foldMemoryOperand(NewMI, Ops, SS);
+ MachineInstr *FoldedMI = TII->foldMemoryOperand(MF, NewMI, Ops, SS);
if (FoldedMI) {
if (!VRM.hasPhys(UnfoldVR))
VRM.assignVirt2Phys(UnfoldVR, UnfoldPR);
/// findSuperReg - Find the SubReg's super-register of given register class
/// where its SubIdx sub-register is SubReg.
static unsigned findSuperReg(const TargetRegisterClass *RC, unsigned SubReg,
- unsigned SubIdx, const MRegisterInfo *MRI) {
+ unsigned SubIdx, const TargetRegisterInfo *TRI) {
for (TargetRegisterClass::iterator I = RC->begin(), E = RC->end();
I != E; ++I) {
unsigned Reg = *I;
- if (MRI->getSubReg(Reg, SubIdx) == SubReg)
+ if (TRI->getSubReg(Reg, SubIdx) == SubReg)
return Reg;
}
return 0;
// Spills - Keep track of which spilled values are available in physregs so
// that we can choose to reuse the physregs instead of emitting reloads.
- AvailableSpills Spills(MRI, TII);
+ AvailableSpills Spills(TRI, TII);
// MaybeDeadStores - When we need to write a value back into a stack slot,
// keep track of the inserted store. If the stack slot value is never read
SmallSet<MachineInstr*, 4> ReMatDefs;
// Keep track of kill information.
- BitVector RegKills(MRI->getNumRegs());
+ BitVector RegKills(TRI->getNumRegs());
std::vector<MachineOperand*> KillOps;
- KillOps.resize(MRI->getNumRegs(), NULL);
+ KillOps.resize(TRI->getNumRegs(), NULL);
for (MachineBasicBlock::iterator MII = MBB.begin(), E = MBB.end();
MII != E; ) {
NextMII = next(MII);
MachineInstr &MI = *MII;
- const TargetInstrDescriptor *TID = MI.getDesc();
+ const TargetInstrDesc &TID = MI.getDesc();
// Insert restores here if asked to.
if (VRM.isRestorePt(&MI)) {
std::vector<unsigned> &RestoreRegs = VRM.getRestorePtRestores(&MI);
for (unsigned i = 0, e = RestoreRegs.size(); i != e; ++i) {
- unsigned VirtReg = RestoreRegs[i];
+ unsigned VirtReg = RestoreRegs[e-i-1]; // Reverse order.
if (!VRM.getPreSplitReg(VirtReg))
continue; // Split interval spilled again.
unsigned Phys = VRM.getPhys(VirtReg);
RegInfo->setPhysRegUsed(Phys);
if (VRM.isReMaterialized(VirtReg)) {
- MRI->reMaterialize(MBB, &MI, Phys,
- VRM.getReMaterializedMI(VirtReg));
- ++NumReMats;
+ ReMaterialize(MBB, MII, Phys, VirtReg, TRI, VRM);
} else {
const TargetRegisterClass* RC = RegInfo->getRegClass(VirtReg);
TII->loadRegFromStackSlot(MBB, &MI, Phys, VRM.getStackSlot(VirtReg),
/// ReusedOperands - Keep track of operand reuse in case we need to undo
/// reuse.
- ReuseInfo ReusedOperands(MI, MRI);
- // Process all of the spilled uses and all non spilled reg references.
+ ReuseInfo ReusedOperands(MI, TRI);
+ SmallVector<unsigned, 4> VirtUseOps;
for (unsigned i = 0, e = MI.getNumOperands(); i != e; ++i) {
MachineOperand &MO = MI.getOperand(i);
if (!MO.isRegister() || MO.getReg() == 0)
continue; // Ignore non-register operands.
unsigned VirtReg = MO.getReg();
- if (MRegisterInfo::isPhysicalRegister(VirtReg)) {
+ if (TargetRegisterInfo::isPhysicalRegister(VirtReg)) {
// Ignore physregs for spilling, but remember that it is used by this
// function.
RegInfo->setPhysRegUsed(VirtReg);
continue;
}
-
- assert(MRegisterInfo::isVirtualRegister(VirtReg) &&
- "Not a virtual or a physical register?");
+
+ // We want to process implicit virtual register uses first.
+ if (MO.isImplicit())
+ VirtUseOps.insert(VirtUseOps.begin(), i);
+ else
+ VirtUseOps.push_back(i);
+ }
+
+ // Process all of the spilled uses and all non spilled reg references.
+ for (unsigned j = 0, e = VirtUseOps.size(); j != e; ++j) {
+ unsigned i = VirtUseOps[j];
+ MachineOperand &MO = MI.getOperand(i);
+ unsigned VirtReg = MO.getReg();
+ assert(TargetRegisterInfo::isVirtualRegister(VirtReg) &&
+ "Not a virtual register?");
unsigned SubIdx = MO.getSubReg();
if (VRM.isAssignedReg(VirtReg)) {
RegInfo->setPhysRegUsed(Phys);
if (MO.isDef())
ReusedOperands.markClobbered(Phys);
- unsigned RReg = SubIdx ? MRI->getSubReg(Phys, SubIdx) : Phys;
+ unsigned RReg = SubIdx ? TRI->getSubReg(Phys, SubIdx) : Phys;
MI.getOperand(i).setReg(RReg);
continue;
}
// aren't allowed to modify the reused register. If none of these cases
// apply, reuse it.
bool CanReuse = true;
- int ti = TID->getOperandConstraint(i, TOI::TIED_TO);
+ int ti = TID.getOperandConstraint(i, TOI::TIED_TO);
if (ti != -1 &&
MI.getOperand(ti).isRegister() &&
MI.getOperand(ti).getReg() == VirtReg) {
else
DOUT << "Reusing SS#" << ReuseSlot;
DOUT << " from physreg "
- << MRI->getName(PhysReg) << " for vreg"
+ << TRI->getName(PhysReg) << " for vreg"
<< VirtReg <<" instead of reloading into physreg "
- << MRI->getName(VRM.getPhys(VirtReg)) << "\n";
- unsigned RReg = SubIdx ? MRI->getSubReg(PhysReg, SubIdx) : PhysReg;
+ << TRI->getName(VRM.getPhys(VirtReg)) << "\n";
+ unsigned RReg = SubIdx ? TRI->getSubReg(PhysReg, SubIdx) : PhysReg;
MI.getOperand(i).setReg(RReg);
// The only technical detail we have is that we don't know that
DOUT << "Reusing RM#" << ReuseSlot-VirtRegMap::MAX_STACK_SLOT-1;
else
DOUT << "Reusing SS#" << ReuseSlot;
- DOUT << " from physreg " << MRI->getName(PhysReg) << " for vreg"
+ DOUT << " from physreg " << TRI->getName(PhysReg) << " for vreg"
<< VirtReg
<< " instead of reloading into same physreg.\n";
- unsigned RReg = SubIdx ? MRI->getSubReg(PhysReg, SubIdx) : PhysReg;
+ unsigned RReg = SubIdx ? TRI->getSubReg(PhysReg, SubIdx) : PhysReg;
MI.getOperand(i).setReg(RReg);
ReusedOperands.markClobbered(RReg);
++NumReused;
Spills.addAvailable(ReuseSlot, &MI, DesignatedReg);
unsigned RReg =
- SubIdx ? MRI->getSubReg(DesignatedReg, SubIdx) : DesignatedReg;
+ SubIdx ? TRI->getSubReg(DesignatedReg, SubIdx) : DesignatedReg;
MI.getOperand(i).setReg(RReg);
DOUT << '\t' << *prior(MII);
++NumReused;
RegInfo->setPhysRegUsed(PhysReg);
ReusedOperands.markClobbered(PhysReg);
if (DoReMat) {
- MRI->reMaterialize(MBB, &MI, PhysReg, VRM.getReMaterializedMI(VirtReg));
- ++NumReMats;
+ ReMaterialize(MBB, MII, PhysReg, VirtReg, TRI, VRM);
} else {
const TargetRegisterClass* RC = RegInfo->getRegClass(VirtReg);
TII->loadRegFromStackSlot(MBB, &MI, PhysReg, SSorRMId, RC);
Spills.addAvailable(SSorRMId, &MI, PhysReg);
// Assumes this is the last use. IsKill will be unset if reg is reused
// unless it's a two-address operand.
- if (TID->getOperandConstraint(i, TOI::TIED_TO) == -1)
+ if (TID.getOperandConstraint(i, TOI::TIED_TO) == -1)
MI.getOperand(i).setIsKill();
- unsigned RReg = SubIdx ? MRI->getSubReg(PhysReg, SubIdx) : PhysReg;
+ unsigned RReg = SubIdx ? TRI->getSubReg(PhysReg, SubIdx) : PhysReg;
MI.getOperand(i).setReg(RReg);
UpdateKills(*prior(MII), RegKills, KillOps);
DOUT << '\t' << *prior(MII);
int StackSlot;
if (!(MR & VirtRegMap::isRef)) {
if (unsigned SrcReg = TII->isStoreToStackSlot(&MI, StackSlot)) {
- assert(MRegisterInfo::isPhysicalRegister(SrcReg) &&
+ assert(TargetRegisterInfo::isPhysicalRegister(SrcReg) &&
"Src hasn't been allocated yet?");
// Okay, this is certainly a store of SrcReg to [StackSlot]. Mark
// this as a potentially dead store in case there is a subsequent
continue;
unsigned VirtReg = MO.getReg();
- if (!MRegisterInfo::isVirtualRegister(VirtReg)) {
+ if (!TargetRegisterInfo::isVirtualRegister(VirtReg)) {
// Check to see if this is a noop copy. If so, eliminate the
// instruction before considering the dest reg to be changed.
unsigned Src, Dst;
// If this def is part of a two-address operand, make sure to execute
// the store from the correct physical register.
unsigned PhysReg;
- int TiedOp = MI.getDesc()->findTiedToSrcOperand(i);
+ int TiedOp = MI.getDesc().findTiedToSrcOperand(i);
if (TiedOp != -1) {
PhysReg = MI.getOperand(TiedOp).getReg();
if (SubIdx) {
- unsigned SuperReg = findSuperReg(RC, PhysReg, SubIdx, MRI);
- assert(SuperReg && MRI->getSubReg(SuperReg, SubIdx) == PhysReg &&
+ unsigned SuperReg = findSuperReg(RC, PhysReg, SubIdx, TRI);
+ assert(SuperReg && TRI->getSubReg(SuperReg, SubIdx) == PhysReg &&
"Can't find corresponding super-register!");
PhysReg = SuperReg;
}
}
RegInfo->setPhysRegUsed(PhysReg);
- unsigned RReg = SubIdx ? MRI->getSubReg(PhysReg, SubIdx) : PhysReg;
+ unsigned RReg = SubIdx ? TRI->getSubReg(PhysReg, SubIdx) : PhysReg;
ReusedOperands.markClobbered(RReg);
MI.getOperand(i).setReg(RReg);
projects / oota-llvm.git / blobdiff