}
}
-/// isReMaterializable - Returns true if the definition MI of the specified
-/// val# of the specified interval is re-materializable.
-bool LiveIntervals::isReMaterializable(const LiveInterval &li,
- const VNInfo *ValNo, MachineInstr *MI) {
- if (DisableReMat)
- return false;
-
- if (tii_->isTriviallyReMaterializable(MI))
- return true;
-
- int FrameIdx = 0;
- if (!tii_->isLoadFromStackSlot(MI, FrameIdx) ||
- !mf_->getFrameInfo()->isFixedObjectIndex(FrameIdx))
- return false;
-
- // This is a load from fixed stack slot. It can be rematerialized unless it's
- // re-defined by a two-address instruction.
- for (LiveInterval::const_vni_iterator i = li.vni_begin(), e = li.vni_end();
- i != e; ++i) {
- const VNInfo *VNI = *i;
- if (VNI == ValNo)
- continue;
- unsigned DefIdx = VNI->def;
- if (DefIdx == ~1U)
- continue; // Dead val#.
- MachineInstr *DefMI = (DefIdx == ~0u)
- ? NULL : getInstructionFromIndex(DefIdx);
- if (DefMI && DefMI->isRegReDefinedByTwoAddr(li.reg))
- return false;
- }
- return true;
-}
-
-/// tryFoldMemoryOperand - Attempts to fold either a spill / restore from
-/// slot / to reg or any rematerialized load into ith operand of specified
-/// MI. If it is successul, MI is updated with the newly created MI and
-/// returns true.
-bool LiveIntervals::tryFoldMemoryOperand(MachineInstr* &MI, VirtRegMap &vrm,
- MachineInstr *DefMI,
- unsigned index, unsigned i,
- bool isSS, int slot, unsigned reg) {
- MachineInstr *fmi = isSS
- ? mri_->foldMemoryOperand(MI, i, slot)
- : mri_->foldMemoryOperand(MI, i, DefMI);
- if (fmi) {
- // Attempt to fold the memory reference into the instruction. If
- // we can do this, we don't need to insert spill code.
- if (lv_)
- lv_->instructionChanged(MI, fmi);
- MachineBasicBlock &MBB = *MI->getParent();
- vrm.virtFolded(reg, MI, i, fmi);
- mi2iMap_.erase(MI);
- i2miMap_[index/InstrSlots::NUM] = fmi;
- mi2iMap_[fmi] = index;
- MI = MBB.insert(MBB.erase(MI), fmi);
- ++numFolded;
- return true;
- }
- return false;
-}
-
-std::vector<LiveInterval*> LiveIntervals::
-addIntervalsForSpills(const LiveInterval &li, VirtRegMap &vrm, unsigned reg) {
- // since this is called after the analysis is done we don't know if
- // LiveVariables is available
- lv_ = getAnalysisToUpdate<LiveVariables>();
-
- std::vector<LiveInterval*> added;
-
- assert(li.weight != HUGE_VALF &&
- "attempt to spill already spilled interval!");
-
- DOUT << "\t\t\t\tadding intervals for spills for interval: ";
- li.print(DOUT, mri_);
- DOUT << '\n';
-
- SSARegMap *RegMap = mf_->getSSARegMap();
- const TargetRegisterClass* rc = RegMap->getRegClass(li.reg);
-
- unsigned NumValNums = li.getNumValNums();
- SmallVector<MachineInstr*, 4> ReMatDefs;
- ReMatDefs.resize(NumValNums, NULL);
- SmallVector<MachineInstr*, 4> ReMatOrigDefs;
- ReMatOrigDefs.resize(NumValNums, NULL);
- SmallVector<int, 4> ReMatIds;
- ReMatIds.resize(NumValNums, VirtRegMap::MAX_STACK_SLOT);
- BitVector ReMatDelete(NumValNums);
- unsigned slot = VirtRegMap::MAX_STACK_SLOT;
-
- bool NeedStackSlot = false;
- for (LiveInterval::const_vni_iterator i = li.vni_begin(), e = li.vni_end();
- i != e; ++i) {
- const VNInfo *VNI = *i;
- unsigned VN = VNI->id;
- unsigned DefIdx = VNI->def;
- if (DefIdx == ~1U)
- continue; // Dead val#.
- // Is the def for the val# rematerializable?
- MachineInstr *DefMI = (DefIdx == ~0u)
- ? NULL : getInstructionFromIndex(DefIdx);
- if (DefMI && isReMaterializable(li, VNI, DefMI)) {
- // Remember how to remat the def of this val#.
- ReMatOrigDefs[VN] = DefMI;
- // Original def may be modified so we have to make a copy here. vrm must
- // delete these!
- ReMatDefs[VN] = DefMI = DefMI->clone();
- vrm.setVirtIsReMaterialized(reg, DefMI);
-
- bool CanDelete = true;
- for (unsigned j = 0, ee = VNI->kills.size(); j != ee; ++j) {
- unsigned KillIdx = VNI->kills[j];
- MachineInstr *KillMI = (KillIdx & 1)
- ? NULL : getInstructionFromIndex(KillIdx);
- // Kill is a phi node, not all of its uses can be rematerialized.
- // It must not be deleted.
- if (!KillMI) {
- CanDelete = false;
- // Need a stack slot if there is any live range where uses cannot be
- // rematerialized.
- NeedStackSlot = true;
- break;
- }
- }
-
- if (CanDelete)
- ReMatDelete.set(VN);
- } else {
- // Need a stack slot if there is any live range where uses cannot be
- // rematerialized.
- NeedStackSlot = true;
- }
- }
-
- // One stack slot per live interval.
- if (NeedStackSlot)
- slot = vrm.assignVirt2StackSlot(reg);
-
- for (LiveInterval::Ranges::const_iterator
- I = li.ranges.begin(), E = li.ranges.end(); I != E; ++I) {
- MachineInstr *DefMI = ReMatDefs[I->valno->id];
- MachineInstr *OrigDefMI = ReMatOrigDefs[I->valno->id];
- bool DefIsReMat = DefMI != NULL;
- bool CanDelete = ReMatDelete[I->valno->id];
- int LdSlot = 0;
- bool isLoadSS = DefIsReMat && tii_->isLoadFromStackSlot(DefMI, LdSlot);
- bool isLoad = isLoadSS ||
- (DefIsReMat && (DefMI->getInstrDescriptor()->Flags & M_LOAD_FLAG));
- unsigned index = getBaseIndex(I->start);
- unsigned end = getBaseIndex(I->end-1) + InstrSlots::NUM;
- for (; index != end; index += InstrSlots::NUM) {
- // skip deleted instructions
- while (index != end && !getInstructionFromIndex(index))
- index += InstrSlots::NUM;
- if (index == end) break;
-
- MachineInstr *MI = getInstructionFromIndex(index);
-
- RestartInstruction:
- for (unsigned i = 0; i != MI->getNumOperands(); ++i) {
- MachineOperand& mop = MI->getOperand(i);
- if (!mop.isRegister())
- continue;
- unsigned Reg = mop.getReg();
- unsigned RegI = Reg;
- if (Reg == 0 || MRegisterInfo::isPhysicalRegister(Reg))
- continue;
- bool isSubReg = RegMap->isSubRegister(Reg);
- unsigned SubIdx = 0;
- if (isSubReg) {
- SubIdx = RegMap->getSubRegisterIndex(Reg);
- Reg = RegMap->getSuperRegister(Reg);
- }
- if (Reg != li.reg)
- continue;
-
- bool TryFold = !DefIsReMat;
- bool FoldSS = true;
- int FoldSlot = slot;
- if (DefIsReMat) {
- // If this is the rematerializable definition MI itself and
- // all of its uses are rematerialized, simply delete it.
- if (MI == OrigDefMI && CanDelete) {
- RemoveMachineInstrFromMaps(MI);
- MI->eraseFromParent();
- break;
- }
-
- // If def for this use can't be rematerialized, then try folding.
- TryFold = !OrigDefMI || (OrigDefMI && (MI == OrigDefMI || isLoad));
- if (isLoad) {
- // Try fold loads (from stack slot, constant pool, etc.) into uses.
- FoldSS = isLoadSS;
- FoldSlot = LdSlot;
- }
- }
-
- // FIXME: fold subreg use
- if (!isSubReg && TryFold &&
- tryFoldMemoryOperand(MI, vrm, DefMI, index, i, FoldSS, FoldSlot, Reg))
- // Folding the load/store can completely change the instruction in
- // unpredictable ways, rescan it from the beginning.
- goto RestartInstruction;
-
- // Create a new virtual register for the spill interval.
- unsigned NewVReg = RegMap->createVirtualRegister(rc);
- if (isSubReg)
- RegMap->setIsSubRegister(NewVReg, NewVReg, SubIdx);
-
- // Scan all of the operands of this instruction rewriting operands
- // to use NewVReg instead of li.reg as appropriate. We do this for
- // two reasons:
- //
- // 1. If the instr reads the same spilled vreg multiple times, we
- // want to reuse the NewVReg.
- // 2. If the instr is a two-addr instruction, we are required to
- // keep the src/dst regs pinned.
- //
- // Keep track of whether we replace a use and/or def so that we can
- // create the spill interval with the appropriate range.
- mop.setReg(NewVReg);
-
- bool HasUse = mop.isUse();
- bool HasDef = mop.isDef();
- for (unsigned j = i+1, e = MI->getNumOperands(); j != e; ++j) {
- if (!MI->getOperand(j).isRegister())
- continue;
- unsigned RegJ = MI->getOperand(j).getReg();
- if (RegJ == 0 || MRegisterInfo::isPhysicalRegister(RegJ))
- continue;
- if (RegJ == RegI) {
- MI->getOperand(j).setReg(NewVReg);
- HasUse |= MI->getOperand(j).isUse();
- HasDef |= MI->getOperand(j).isDef();
- }
- }
-
- vrm.grow();
- if (DefIsReMat) {
- vrm.setVirtIsReMaterialized(NewVReg, DefMI/*, CanDelete*/);
- if (ReMatIds[I->valno->id] == VirtRegMap::MAX_STACK_SLOT) {
- // Each valnum may have its own remat id.
- ReMatIds[I->valno->id] = vrm.assignVirtReMatId(NewVReg);
- } else {
- vrm.assignVirtReMatId(NewVReg, ReMatIds[I->valno->id]);
- }
- if (!CanDelete || (HasUse && HasDef)) {
- // If this is a two-addr instruction then its use operands are
- // rematerializable but its def is not. It should be assigned a
- // stack slot.
- vrm.assignVirt2StackSlot(NewVReg, slot);
- }
- } else {
- vrm.assignVirt2StackSlot(NewVReg, slot);
- }
-
- // create a new register interval for this spill / remat.
- LiveInterval &nI = getOrCreateInterval(NewVReg);
- assert(nI.empty());
-
- // the spill weight is now infinity as it
- // cannot be spilled again
- nI.weight = HUGE_VALF;
-
- if (HasUse) {
- LiveRange LR(getLoadIndex(index), getUseIndex(index)+1,
- nI.getNextValue(~0U, 0, VNInfoAllocator));
- DOUT << " +" << LR;
- nI.addRange(LR);
- }
- if (HasDef) {
- LiveRange LR(getDefIndex(index), getStoreIndex(index),
- nI.getNextValue(~0U, 0, VNInfoAllocator));
- DOUT << " +" << LR;
- nI.addRange(LR);
- }
-
- added.push_back(&nI);
-
- // update live variables if it is available
- if (lv_)
- lv_->addVirtualRegisterKilled(NewVReg, MI);
-
- DOUT << "\t\t\t\tadded new interval: ";
- nI.print(DOUT, mri_);
- DOUT << '\n';
- }
- }
- }
-
- return added;
-}
-
/// conflictsWithPhysRegDef - Returns true if the specified register
/// is defined during the duration of the specified interval.
bool LiveIntervals::conflictsWithPhysRegDef(const LiveInterval &li,
HUGE_VALF : 0.0F;
return LiveInterval(reg, Weight);
}
+
+
+//===----------------------------------------------------------------------===//
+// Register allocator hooks.
+//
+
+/// isReMaterializable - Returns true if the definition MI of the specified
+/// val# of the specified interval is re-materializable.
+bool LiveIntervals::isReMaterializable(const LiveInterval &li,
+ const VNInfo *ValNo, MachineInstr *MI) {
+ if (DisableReMat)
+ return false;
+
+ if (tii_->isTriviallyReMaterializable(MI))
+ return true;
+
+ int FrameIdx = 0;
+ if (!tii_->isLoadFromStackSlot(MI, FrameIdx) ||
+ !mf_->getFrameInfo()->isFixedObjectIndex(FrameIdx))
+ return false;
+
+ // This is a load from fixed stack slot. It can be rematerialized unless it's
+ // re-defined by a two-address instruction.
+ for (LiveInterval::const_vni_iterator i = li.vni_begin(), e = li.vni_end();
+ i != e; ++i) {
+ const VNInfo *VNI = *i;
+ if (VNI == ValNo)
+ continue;
+ unsigned DefIdx = VNI->def;
+ if (DefIdx == ~1U)
+ continue; // Dead val#.
+ MachineInstr *DefMI = (DefIdx == ~0u)
+ ? NULL : getInstructionFromIndex(DefIdx);
+ if (DefMI && DefMI->isRegReDefinedByTwoAddr(li.reg))
+ return false;
+ }
+ return true;
+}
+
+/// tryFoldMemoryOperand - Attempts to fold either a spill / restore from
+/// slot / to reg or any rematerialized load into ith operand of specified
+/// MI. If it is successul, MI is updated with the newly created MI and
+/// returns true.
+bool LiveIntervals::tryFoldMemoryOperand(MachineInstr* &MI, VirtRegMap &vrm,
+ MachineInstr *DefMI,
+ unsigned index, unsigned i,
+ bool isSS, int slot, unsigned reg) {
+ MachineInstr *fmi = isSS
+ ? mri_->foldMemoryOperand(MI, i, slot)
+ : mri_->foldMemoryOperand(MI, i, DefMI);
+ if (fmi) {
+ // Attempt to fold the memory reference into the instruction. If
+ // we can do this, we don't need to insert spill code.
+ if (lv_)
+ lv_->instructionChanged(MI, fmi);
+ MachineBasicBlock &MBB = *MI->getParent();
+ vrm.virtFolded(reg, MI, i, fmi);
+ mi2iMap_.erase(MI);
+ i2miMap_[index/InstrSlots::NUM] = fmi;
+ mi2iMap_[fmi] = index;
+ MI = MBB.insert(MBB.erase(MI), fmi);
+ ++numFolded;
+ return true;
+ }
+ return false;
+}
+
+/// rewriteInstructionForSpills, rewriteInstructionsForSpills - Helper functions
+/// for addIntervalsForSpills to rewrite uses / defs for the given live range.
+void LiveIntervals::
+rewriteInstructionForSpills(const LiveInterval &li,
+ unsigned id, unsigned index, unsigned end,
+ MachineInstr *MI, MachineInstr *OrigDefMI, MachineInstr *DefMI,
+ unsigned Slot, int LdSlot,
+ bool isLoad, bool isLoadSS, bool DefIsReMat, bool CanDelete,
+ VirtRegMap &vrm, SSARegMap *RegMap,
+ const TargetRegisterClass* rc,
+ SmallVector<int, 4> &ReMatIds,
+ std::vector<LiveInterval*> &NewLIs) {
+ RestartInstruction:
+ for (unsigned i = 0; i != MI->getNumOperands(); ++i) {
+ MachineOperand& mop = MI->getOperand(i);
+ if (!mop.isRegister())
+ continue;
+ unsigned Reg = mop.getReg();
+ unsigned RegI = Reg;
+ if (Reg == 0 || MRegisterInfo::isPhysicalRegister(Reg))
+ continue;
+ bool isSubReg = RegMap->isSubRegister(Reg);
+ unsigned SubIdx = 0;
+ if (isSubReg) {
+ SubIdx = RegMap->getSubRegisterIndex(Reg);
+ Reg = RegMap->getSuperRegister(Reg);
+ }
+ if (Reg != li.reg)
+ continue;
+
+ bool TryFold = !DefIsReMat;
+ bool FoldSS = true;
+ int FoldSlot = Slot;
+ if (DefIsReMat) {
+ // If this is the rematerializable definition MI itself and
+ // all of its uses are rematerialized, simply delete it.
+ if (MI == OrigDefMI && CanDelete) {
+ RemoveMachineInstrFromMaps(MI);
+ MI->eraseFromParent();
+ break;
+ }
+
+ // If def for this use can't be rematerialized, then try folding.
+ TryFold = !OrigDefMI || (OrigDefMI && (MI == OrigDefMI || isLoad));
+ if (isLoad) {
+ // Try fold loads (from stack slot, constant pool, etc.) into uses.
+ FoldSS = isLoadSS;
+ FoldSlot = LdSlot;
+ }
+ }
+
+ // FIXME: fold subreg use
+ if (!isSubReg && TryFold &&
+ tryFoldMemoryOperand(MI, vrm, DefMI, index, i, FoldSS, FoldSlot, Reg))
+ // Folding the load/store can completely change the instruction in
+ // unpredictable ways, rescan it from the beginning.
+ goto RestartInstruction;
+
+ // Create a new virtual register for the spill interval.
+ unsigned NewVReg = RegMap->createVirtualRegister(rc);
+ vrm.grow();
+ if (isSubReg)
+ RegMap->setIsSubRegister(NewVReg, NewVReg, SubIdx);
+
+ // Scan all of the operands of this instruction rewriting operands
+ // to use NewVReg instead of li.reg as appropriate. We do this for
+ // two reasons:
+ //
+ // 1. If the instr reads the same spilled vreg multiple times, we
+ // want to reuse the NewVReg.
+ // 2. If the instr is a two-addr instruction, we are required to
+ // keep the src/dst regs pinned.
+ //
+ // Keep track of whether we replace a use and/or def so that we can
+ // create the spill interval with the appropriate range.
+ mop.setReg(NewVReg);
+
+ bool HasUse = mop.isUse();
+ bool HasDef = mop.isDef();
+ for (unsigned j = i+1, e = MI->getNumOperands(); j != e; ++j) {
+ if (!MI->getOperand(j).isRegister())
+ continue;
+ unsigned RegJ = MI->getOperand(j).getReg();
+ if (RegJ == 0 || MRegisterInfo::isPhysicalRegister(RegJ))
+ continue;
+ if (RegJ == RegI) {
+ MI->getOperand(j).setReg(NewVReg);
+ HasUse |= MI->getOperand(j).isUse();
+ HasDef |= MI->getOperand(j).isDef();
+ }
+ }
+
+ if (DefIsReMat) {
+ vrm.setVirtIsReMaterialized(NewVReg, DefMI/*, CanDelete*/);
+ if (ReMatIds[id] == VirtRegMap::MAX_STACK_SLOT) {
+ // Each valnum may have its own remat id.
+ ReMatIds[id] = vrm.assignVirtReMatId(NewVReg);
+ } else {
+ vrm.assignVirtReMatId(NewVReg, ReMatIds[id]);
+ }
+ if (!CanDelete || (HasUse && HasDef)) {
+ // If this is a two-addr instruction then its use operands are
+ // rematerializable but its def is not. It should be assigned a
+ // stack slot.
+ vrm.assignVirt2StackSlot(NewVReg, Slot);
+ }
+ } else {
+ vrm.assignVirt2StackSlot(NewVReg, Slot);
+ }
+
+ // create a new register interval for this spill / remat.
+ LiveInterval &nI = getOrCreateInterval(NewVReg);
+ assert(nI.empty());
+ NewLIs.push_back(&nI);
+
+ // the spill weight is now infinity as it
+ // cannot be spilled again
+ nI.weight = HUGE_VALF;
+
+ if (HasUse) {
+ LiveRange LR(getLoadIndex(index), getUseIndex(index)+1,
+ nI.getNextValue(~0U, 0, VNInfoAllocator));
+ DOUT << " +" << LR;
+ nI.addRange(LR);
+ }
+ if (HasDef) {
+ LiveRange LR(getDefIndex(index), getStoreIndex(index),
+ nI.getNextValue(~0U, 0, VNInfoAllocator));
+ DOUT << " +" << LR;
+ nI.addRange(LR);
+ }
+
+ // update live variables if it is available
+ if (lv_)
+ lv_->addVirtualRegisterKilled(NewVReg, MI);
+
+ DOUT << "\t\t\t\tAdded new interval: ";
+ nI.print(DOUT, mri_);
+ DOUT << '\n';
+ }
+}
+
+void LiveIntervals::
+rewriteInstructionsForSpills(const LiveInterval &li,
+ LiveInterval::Ranges::const_iterator &I,
+ MachineInstr *OrigDefMI, MachineInstr *DefMI,
+ unsigned Slot, int LdSlot,
+ bool isLoad, bool isLoadSS, bool DefIsReMat, bool CanDelete,
+ VirtRegMap &vrm, SSARegMap *RegMap,
+ const TargetRegisterClass* rc,
+ SmallVector<int, 4> &ReMatIds,
+ std::vector<LiveInterval*> &NewLIs) {
+ unsigned index = getBaseIndex(I->start);
+ unsigned end = getBaseIndex(I->end-1) + InstrSlots::NUM;
+ for (; index != end; index += InstrSlots::NUM) {
+ // skip deleted instructions
+ while (index != end && !getInstructionFromIndex(index))
+ index += InstrSlots::NUM;
+ if (index == end) break;
+
+ MachineInstr *MI = getInstructionFromIndex(index);
+ rewriteInstructionForSpills(li, I->valno->id, index, end, MI,
+ OrigDefMI, DefMI, Slot, LdSlot, isLoad,
+ isLoadSS, DefIsReMat, CanDelete, vrm,
+ RegMap, rc, ReMatIds, NewLIs);
+ }
+}
+
+std::vector<LiveInterval*> LiveIntervals::
+addIntervalsForSpills(const LiveInterval &li, VirtRegMap &vrm) {
+ // Since this is called after the analysis is done we don't know if
+ // LiveVariables is available
+ lv_ = getAnalysisToUpdate<LiveVariables>();
+
+ assert(li.weight != HUGE_VALF &&
+ "attempt to spill already spilled interval!");
+
+ DOUT << "\t\t\t\tadding intervals for spills for interval: ";
+ li.print(DOUT, mri_);
+ DOUT << '\n';
+
+ std::vector<LiveInterval*> NewLIs;
+ SSARegMap *RegMap = mf_->getSSARegMap();
+ const TargetRegisterClass* rc = RegMap->getRegClass(li.reg);
+
+ unsigned NumValNums = li.getNumValNums();
+ SmallVector<MachineInstr*, 4> ReMatDefs;
+ ReMatDefs.resize(NumValNums, NULL);
+ SmallVector<MachineInstr*, 4> ReMatOrigDefs;
+ ReMatOrigDefs.resize(NumValNums, NULL);
+ SmallVector<int, 4> ReMatIds;
+ ReMatIds.resize(NumValNums, VirtRegMap::MAX_STACK_SLOT);
+ BitVector ReMatDelete(NumValNums);
+ unsigned Slot = VirtRegMap::MAX_STACK_SLOT;
+
+ bool NeedStackSlot = false;
+ for (LiveInterval::const_vni_iterator i = li.vni_begin(), e = li.vni_end();
+ i != e; ++i) {
+ const VNInfo *VNI = *i;
+ unsigned VN = VNI->id;
+ unsigned DefIdx = VNI->def;
+ if (DefIdx == ~1U)
+ continue; // Dead val#.
+ // Is the def for the val# rematerializable?
+ MachineInstr *DefMI = (DefIdx == ~0u) ? 0 : getInstructionFromIndex(DefIdx);
+ if (DefMI && isReMaterializable(li, VNI, DefMI)) {
+ // Remember how to remat the def of this val#.
+ ReMatOrigDefs[VN] = DefMI;
+ // Original def may be modified so we have to make a copy here. vrm must
+ // delete these!
+ ReMatDefs[VN] = DefMI = DefMI->clone();
+ vrm.setVirtIsReMaterialized(li.reg, DefMI);
+
+ bool CanDelete = true;
+ for (unsigned j = 0, ee = VNI->kills.size(); j != ee; ++j) {
+ unsigned KillIdx = VNI->kills[j];
+ MachineInstr *KillMI = (KillIdx & 1)
+ ? NULL : getInstructionFromIndex(KillIdx);
+ // Kill is a phi node, not all of its uses can be rematerialized.
+ // It must not be deleted.
+ if (!KillMI) {
+ CanDelete = false;
+ // Need a stack slot if there is any live range where uses cannot be
+ // rematerialized.
+ NeedStackSlot = true;
+ break;
+ }
+ }
+
+ if (CanDelete)
+ ReMatDelete.set(VN);
+ } else {
+ // Need a stack slot if there is any live range where uses cannot be
+ // rematerialized.
+ NeedStackSlot = true;
+ }
+ }
+
+ // One stack slot per live interval.
+ if (NeedStackSlot)
+ Slot = vrm.assignVirt2StackSlot(li.reg);
+
+ // Create new intervals and rewrite defs and uses.
+ for (LiveInterval::Ranges::const_iterator
+ I = li.ranges.begin(), E = li.ranges.end(); I != E; ++I) {
+ MachineInstr *DefMI = ReMatDefs[I->valno->id];
+ MachineInstr *OrigDefMI = ReMatOrigDefs[I->valno->id];
+ bool DefIsReMat = DefMI != NULL;
+ bool CanDelete = ReMatDelete[I->valno->id];
+ int LdSlot = 0;
+ bool isLoadSS = DefIsReMat && tii_->isLoadFromStackSlot(DefMI, LdSlot);
+ bool isLoad = isLoadSS ||
+ (DefIsReMat && (DefMI->getInstrDescriptor()->Flags & M_LOAD_FLAG));
+ rewriteInstructionsForSpills(li, I, OrigDefMI, DefMI, Slot, LdSlot,
+ isLoad, isLoadSS, DefIsReMat, CanDelete,
+ vrm, RegMap, rc, ReMatIds, NewLIs);
+ }
+
+ return NewLIs;
+}
projects / oota-llvm.git / commitdiff