示例#1
0
static std::string computeDataLayout(const Triple &TT) {
  // X86 is little endian
  std::string Ret = "e";

  Ret += DataLayout::getManglingComponent(TT);
  // X86 and x32 have 32 bit pointers.
  if ((TT.isArch64Bit() &&
       (TT.getEnvironment() == Triple::GNUX32 || TT.isOSNaCl())) ||
      !TT.isArch64Bit())
    Ret += "-p:32:32";

  // Some ABIs align 64 bit integers and doubles to 64 bits, others to 32.
  if (TT.isArch64Bit() || TT.isOSWindows() || TT.isOSNaCl())
    Ret += "-i64:64";
  else if (TT.isOSIAMCU())
    Ret += "-i64:32-f64:32";
  else
    Ret += "-f64:32:64";

  // Some ABIs align long double to 128 bits, others to 32.
  if (TT.isOSNaCl() || TT.isOSIAMCU())
    ; // No f80
  else if (TT.isArch64Bit() || TT.isOSDarwin())
    Ret += "-f80:128";
  else
    Ret += "-f80:32";

  if (TT.isOSIAMCU())
    Ret += "-f128:32";

  // The registers can hold 8, 16, 32 or, in x86-64, 64 bits.
  if (TT.isArch64Bit())
    Ret += "-n8:16:32:64";
  else
    Ret += "-n8:16:32";

  // The stack is aligned to 32 bits on some ABIs and 128 bits on others.
  if ((!TT.isArch64Bit() && TT.isOSWindows()) || TT.isOSIAMCU())
    Ret += "-a:0:32-S32";
  else
    Ret += "-S128";

  return Ret;
}
示例#2
0
static std::unique_ptr<TargetLoweringObjectFile> createTLOF(const Triple &TT) {
  if (TT.isOSBinFormatMachO()) {
    if (TT.getArch() == Triple::x86_64)
      return llvm::make_unique<X86_64MachoTargetObjectFile>();
    return llvm::make_unique<TargetLoweringObjectFileMachO>();
  }

  if (TT.isOSFreeBSD())
    return llvm::make_unique<X86FreeBSDTargetObjectFile>();
  if (TT.isOSLinux() || TT.isOSNaCl() || TT.isOSIAMCU())
    return llvm::make_unique<X86LinuxNaClTargetObjectFile>();
  if (TT.isOSFuchsia())
    return llvm::make_unique<X86FuchsiaTargetObjectFile>();
  if (TT.isOSBinFormatELF())
    return llvm::make_unique<X86ELFTargetObjectFile>();
  if (TT.isKnownWindowsMSVCEnvironment() || TT.isWindowsCoreCLREnvironment())
    return llvm::make_unique<X86WindowsTargetObjectFile>();
  if (TT.isOSBinFormatCOFF())
    return llvm::make_unique<TargetLoweringObjectFileCOFF>();
  llvm_unreachable("unknown subtarget type");
}