text: //===-- MipsSubtarget.cpp - Mips Subtarget Information --------------------===//
  //
  //                     The LLVM Compiler Infrastructure
  //
  // This file is distributed under the University of Illinois Open Source
  // License. See LICENSE.TXT for details.
  //
  //===----------------------------------------------------------------------===//
  //
  // This file implements the Mips specific subclass of TargetSubtargetInfo.
  //
  //===----------------------------------------------------------------------===//
  
  #include "MipsSubtarget.h"
  #include "Mips.h"
  #include "MipsRegisterInfo.h"
  #include "llvm/Support/TargetRegistry.h"
  
  #define GET_SUBTARGETINFO_TARGET_DESC
  #define GET_SUBTARGETINFO_CTOR
  #include "MipsGenSubtargetInfo.inc"
  
  using namespace llvm;
  
  void MipsSubtarget::anchor() { }
  
  MipsSubtarget::MipsSubtarget(const std::string &TT, const std::string &CPU,
                               const std::string &FS, bool little,
                               Reloc::Model RM) :
    MipsGenSubtargetInfo(TT, CPU, FS),
    MipsArchVersion(Mips32), MipsABI(UnknownABI), IsLittle(little),
    IsSingleFloat(false), IsFP64bit(false), IsGP64bit(false), HasVFPU(false),
    IsLinux(true), HasSEInReg(false), HasCondMov(false), HasMulDivAdd(false),
    HasMinMax(false), HasSwap(false), HasBitCount(false), InMips16Mode(false),
    HasDSP(false), HasDSPR2(false), IsAndroid(false)
  {
    std::string CPUName = CPU;
    if (CPUName.empty())
      CPUName = "mips32";
  
    // Parse features string.
    ParseSubtargetFeatures(CPUName, FS);
  
    // Initialize scheduling itinerary for the specified CPU.
    InstrItins = getInstrItineraryForCPU(CPUName);
  
    // Set MipsABI if it hasn't been set yet.
    if (MipsABI == UnknownABI)
      MipsABI = hasMips64() ? N64 : O32;
  
    // Check if Architecture and ABI are compatible.
    assert(((!hasMips64() && (isABI_O32() || isABI_EABI())) ||
            (hasMips64() && (isABI_N32() || isABI_N64()))) &&
           "Invalid  Arch & ABI pair.");
  
    // Is the target system Linux ?
    if (TT.find("linux") == std::string::npos)
      IsLinux = false;
  
    // Set UseSmallSection.
    UseSmallSection = !IsLinux && (RM == Reloc::Static);
  }
  
  bool
  MipsSubtarget::enablePostRAScheduler(CodeGenOpt::Level OptLevel,
                                      TargetSubtargetInfo::AntiDepBreakMode &Mode,
                                       RegClassVector &CriticalPathRCs) const {
    Mode = TargetSubtargetInfo::ANTIDEP_NONE;
    CriticalPathRCs.clear();
    CriticalPathRCs.push_back(hasMips64() ?
                              &Mips::CPU64RegsRegClass : &Mips::CPURegsRegClass);
    return OptLevel >= CodeGenOpt::Aggressive;
  }
  