RegAllocFast.cpp

    if (const unsigned *Defs = (*I)->getImplicitDefs())
      while (*Defs)
        MRI->setPhysRegUsed(*Defs++);

  SkippedInstrs.clear();
  StackSlotForVirtReg.clear();
  return true;
}

FunctionPass *llvm::createFastRegisterAllocator() {
  return new RAFast();
}