- LiveIntervals *lis = &getAnalysis<LiveIntervals>();
- MachineLoopInfo *loopInfo = &getAnalysis<MachineLoopInfo>();
- const TargetInstrInfo *tii = fn.getTarget().getInstrInfo();
- MachineRegisterInfo *mri = &fn.getRegInfo();
-
- SmallSet<unsigned, 4> processed;
- for (MachineFunction::iterator mbbi = fn.begin(), mbbe = fn.end();
- mbbi != mbbe; ++mbbi) {
- MachineBasicBlock* mbb = mbbi;
- SlotIndex mbbEnd = lis->getMBBEndIdx(mbb);
- MachineLoop* loop = loopInfo->getLoopFor(mbb);
- unsigned loopDepth = loop ? loop->getLoopDepth() : 0;
- bool isExiting = loop ? loop->isLoopExiting(mbb) : false;
-
- for (MachineBasicBlock::const_iterator mii = mbb->begin(), mie = mbb->end();
- mii != mie; ++mii) {
- const MachineInstr *mi = mii;
- if (tii->isIdentityCopy(*mi) || mi->isImplicitDef() || mi->isDebugValue())
- continue;
-
- for (unsigned i = 0, e = mi->getNumOperands(); i != e; ++i) {
- const MachineOperand &mopi = mi->getOperand(i);
- if (!mopi.isReg() || mopi.getReg() == 0)
- continue;
- unsigned reg = mopi.getReg();
- if (!TargetRegisterInfo::isVirtualRegister(mopi.getReg()))
- continue;
- // Multiple uses of reg by the same instruction. It should not
- // contribute to spill weight again.
- if (!processed.insert(reg))
- continue;
-
- bool hasDef = mopi.isDef();
- bool hasUse = !hasDef;
- for (unsigned j = i+1; j != e; ++j) {
- const MachineOperand &mopj = mi->getOperand(j);
- if (!mopj.isReg() || mopj.getReg() != reg)
- continue;
- hasDef |= mopj.isDef();
- hasUse |= mopj.isUse();
- if (hasDef && hasUse)
- break;
- }
-
- LiveInterval ®Int = lis->getInterval(reg);
- float weight = lis->getSpillWeight(hasDef, hasUse, loopDepth);
- if (hasDef && isExiting) {
- // Looks like this is a loop count variable update.
- SlotIndex defIdx = lis->getInstructionIndex(mi).getDefIndex();
- const LiveRange *dlr =
- lis->getInterval(reg).getLiveRangeContaining(defIdx);
- if (dlr->end >= mbbEnd)
- weight *= 3.0F;
- }
- regInt.weight += weight;
- }
- processed.clear();
- }
+ LiveIntervals &lis = getAnalysis<LiveIntervals>();
+ VirtRegAuxInfo vrai(fn, lis, getAnalysis<MachineLoopInfo>());
+ for (LiveIntervals::iterator I = lis.begin(), E = lis.end(); I != E; ++I) {
+ LiveInterval &li = *I->second;
+ if (TargetRegisterInfo::isVirtualRegister(li.reg))
+ vrai.CalculateWeightAndHint(li);