RegAllocLocal.cpp

  // mapping for all virtual registers
  unsigned LastVirtReg = MF->getRegInfo().getLastVirtReg();
  StackSlotForVirtReg.grow(LastVirtReg);
  Virt2PhysRegMap.grow(LastVirtReg);
  Virt2LastUseMap.grow(LastVirtReg);
  VirtRegModified.resize(LastVirtReg+1-TargetRegisterInfo::FirstVirtualRegister);
  UsedInMultipleBlocks.resize(LastVirtReg+1-TargetRegisterInfo::FirstVirtualRegister);
 
  // Loop over all of the basic blocks, eliminating virtual register references
  for (MachineFunction::iterator MBB = Fn.begin(), MBBe = Fn.end();
       MBB != MBBe; ++MBB)
    AllocateBasicBlock(*MBB);

  StackSlotForVirtReg.clear();
  PhysRegsUsed.clear();
  VirtRegModified.clear();
  UsedInMultipleBlocks.clear();
  Virt2PhysRegMap.clear();
  Virt2LastUseMap.clear();
  return true;
}

FunctionPass *llvm::createLocalRegisterAllocator() {
  return new RALocal();
}