#include "llvm/CodeGen/LiveRangeEdit.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/CalcSpillWeights.h"
#include "llvm/CodeGen/LiveRangeEdit.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/CalcSpillWeights.h"
STATISTIC(NumDCEDeleted, "Number of instructions deleted by DCE");
STATISTIC(NumDCEFoldedLoads, "Number of single use loads folded after DCE");
STATISTIC(NumFracRanges, "Number of live ranges fractured by DCE");
STATISTIC(NumDCEDeleted, "Number of instructions deleted by DCE");
STATISTIC(NumDCEFoldedLoads, "Number of single use loads folded after DCE");
STATISTIC(NumFracRanges, "Number of live ranges fractured by DCE");
bool LiveRangeEdit::foldAsLoad(LiveInterval *LI,
SmallVectorImpl<MachineInstr*> &Dead) {
bool LiveRangeEdit::foldAsLoad(LiveInterval *LI,
SmallVectorImpl<MachineInstr*> &Dead) {
- for (MachineRegisterInfo::reg_nodbg_iterator I = MRI.reg_nodbg_begin(LI->reg),
- E = MRI.reg_nodbg_end(); I != E; ++I) {
- MachineOperand &MO = I.getOperand();
+ for (MachineOperand &MO : MRI.reg_nodbg_operands(LI->reg)) {
// We also need to make sure it is safe to move the load.
// Assume there are stores between DefMI and UseMI.
bool SawStore = true;
// We also need to make sure it is safe to move the load.
// Assume there are stores between DefMI and UseMI.
bool SawStore = true;
DEBUG(dbgs() << " folded: " << *FoldMI);
LIS.ReplaceMachineInstrInMaps(UseMI, FoldMI);
UseMI->eraseFromParent();
DEBUG(dbgs() << " folded: " << *FoldMI);
LIS.ReplaceMachineInstrInMaps(UseMI, FoldMI);
UseMI->eraseFromParent();
else if (MOI->isDef()) {
for (MCRegUnitIterator Units(Reg, MRI.getTargetRegisterInfo());
Units.isValid(); ++Units) {
else if (MOI->isDef()) {
for (MCRegUnitIterator Units(Reg, MRI.getTargetRegisterInfo());
Units.isValid(); ++Units) {
// Always shrink COPY uses that probably come from live range splitting.
if (MI->readsVirtualRegister(Reg) &&
(MI->isCopy() || MOI->isDef() || MRI.hasOneNonDBGUse(Reg) ||
// Always shrink COPY uses that probably come from live range splitting.
if (MI->readsVirtualRegister(Reg) &&
(MI->isCopy() || MOI->isDef() || MRI.hasOneNonDBGUse(Reg) ||
if (MRI.recomputeRegClass(LI.reg, MF.getTarget()))
DEBUG(dbgs() << "Inflated " << PrintReg(LI.reg) << " to "
<< MRI.getRegClass(LI.reg)->getName() << '\n');
if (MRI.recomputeRegClass(LI.reg, MF.getTarget()))
DEBUG(dbgs() << "Inflated " << PrintReg(LI.reg) << " to "
<< MRI.getRegClass(LI.reg)->getName() << '\n');