lib/CodeGen/RegisterScavenging.cpp

387   unsigned SReg = findSurvivorReg(I, Candidates, 25, UseMI);
390   if (!isAliasUsed(SReg)) {
391     DEBUG(dbgs() << "Scavenged register: " << TRI->getName(SReg) << "\n");
392     return SReg;
408   Scavenged[SI].Reg = SReg;
412   if (!TRI->saveScavengerRegister(*MBB, I, UseMI, RC, SReg)) {
416     TII->storeRegToStackSlot(*MBB, I, SReg, true, Scavenged[SI].FrameIndex,
424     TII->loadRegFromStackSlot(*MBB, UseMI, SReg, Scavenged[SI].FrameIndex,
435   // Scavenged[SI].Reg = SReg;
437   DEBUG(dbgs() << "Scavenged register (with spill): " << TRI->getName(SReg) <<
440   return SReg;