- for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
- MachineOperand &MO = MI->getOperand(i);
- if (!MO.isReg()) continue;
- unsigned Reg = MO.getReg();
- if (!Reg || TargetRegisterInfo::isPhysicalRegister(Reg)) continue;
- LiveRegMap::iterator LRI = LiveVirtRegs.find(Reg);
- if (LRI != LiveVirtRegs.end())
- setPhysReg(MI, i, LRI->second.PhysReg);
- else
- MO.setReg(0); // We can't allocate a physreg for a DebugValue, sorry!
+ bool ScanDbgValue = true;
+ while (ScanDbgValue) {
+ ScanDbgValue = false;
+ for (unsigned i = 0, e = MI->getNumOperands(); i != e; ++i) {
+ MachineOperand &MO = MI->getOperand(i);
+ if (!MO.isReg()) continue;
+ unsigned Reg = MO.getReg();
+ if (!TargetRegisterInfo::isVirtualRegister(Reg)) continue;
+ LiveDbgValueMap[Reg].push_back(MI);
+ LiveRegMap::iterator LRI = LiveVirtRegs.find(Reg);
+ if (LRI != LiveVirtRegs.end())
+ setPhysReg(MI, i, LRI->second.PhysReg);
+ else {
+ int SS = StackSlotForVirtReg[Reg];
+ if (SS == -1) {
+ // We can't allocate a physreg for a DebugValue, sorry!
+ DEBUG(dbgs() << "Unable to allocate vreg used by DBG_VALUE");
+ MO.setReg(0);
+ }
+ else {
+ // Modify DBG_VALUE now that the value is in a spill slot.
+ int64_t Offset = MI->getOperand(1).getImm();
+ const MDNode *MDPtr =
+ MI->getOperand(MI->getNumOperands()-1).getMetadata();
+ DebugLoc DL = MI->getDebugLoc();
+ if (MachineInstr *NewDV =
+ TII->emitFrameIndexDebugValue(*MF, SS, Offset, MDPtr, DL)) {
+ DEBUG(dbgs() << "Modifying debug info due to spill:" <<
+ "\t" << *MI);
+ MachineBasicBlock *MBB = MI->getParent();
+ MBB->insert(MBB->erase(MI), NewDV);
+ // Scan NewDV operands from the beginning.
+ MI = NewDV;
+ ScanDbgValue = true;
+ break;
+ } else {
+ // We can't allocate a physreg for a DebugValue; sorry!
+ DEBUG(dbgs() << "Unable to allocate vreg used by DBG_VALUE");
+ MO.setReg(0);
+ }
+ }
+ }
+ }