C++ Driver::Diag方法代码示例

void msp430::getMSP430TargetFeatures(const Driver &D, const ArgList &Args,
                                     std::vector<StringRef> &Features) {
  const Arg *MCU = Args.getLastArg(options::OPT_mmcu_EQ);
  if (MCU && !isSupportedMCU(MCU->getValue())) {
    D.Diag(diag::err_drv_clang_unsupported) << MCU->getValue();
    return;
  }

  const Arg *HWMultArg = Args.getLastArg(options::OPT_mhwmult_EQ);
  if (!MCU && !HWMultArg)
    return;

  StringRef HWMult = HWMultArg ? HWMultArg->getValue() : "auto";
  StringRef SupportedHWMult = getSupportedHWMult(MCU);

  if (HWMult == "auto") {
    // 'auto' - deduce hw multiplier support based on mcu name provided.
    // If no mcu name is provided, assume no hw multiplier is supported.
    if (!MCU)
      D.Diag(clang::diag::warn_drv_msp430_hwmult_no_device);
    HWMult = SupportedHWMult;
  }

  if (HWMult == "none") {
    // 'none' - disable hw multiplier.
    Features.push_back("-hwmult16");
    Features.push_back("-hwmult32");
    Features.push_back("-hwmultf5");
    return;
  }

  if (MCU && SupportedHWMult == "none")
    D.Diag(clang::diag::warn_drv_msp430_hwmult_unsupported) << HWMult;
  if (MCU && HWMult != SupportedHWMult)
    D.Diag(clang::diag::warn_drv_msp430_hwmult_mismatch)
        << SupportedHWMult << HWMult;

  if (HWMult == "16bit") {
    // '16bit' - for 16-bit only hw multiplier.
    Features.push_back("+hwmult16");
  } else if (HWMult == "32bit") {
    // '32bit' - for 16/32-bit hw multiplier.
    Features.push_back("+hwmult32");
  } else if (HWMult == "f5series") {
    // 'f5series' - for 16/32-bit hw multiplier supported by F5 series mcus.
    Features.push_back("+hwmultf5");
  } else {
    D.Diag(clang::diag::err_drv_unsupported_option_argument)
        << HWMultArg->getAsString(Args) << HWMult;
  }
}

MyriadToolChain::MyriadToolChain(const Driver &D, const llvm::Triple &Triple,
                                 const ArgList &Args)
    : Generic_ELF(D, Triple, Args) {
  // If a target of 'sparc-myriad-elf' is specified to clang, it wants to use
  // 'sparc-myriad--elf' (note the unknown OS) as the canonical triple.
  // This won't work to find gcc. Instead we give the installation detector an
  // extra triple, which is preferable to further hacks of the logic that at
  // present is based solely on getArch(). In particular, it would be wrong to
  // choose the myriad installation when targeting a non-myriad sparc install.
  switch (Triple.getArch()) {
  default:
    D.Diag(clang::diag::err_target_unsupported_arch)
        << Triple.getArchName() << "myriad";
  case llvm::Triple::sparc:
  case llvm::Triple::sparcel:
  case llvm::Triple::shave:
    GCCInstallation.init(Triple, Args, {"sparc-myriad-elf"});
  }

  if (GCCInstallation.isValid()) {
    // This directory contains crt{i,n,begin,end}.o as well as libgcc.
    // These files are tied to a particular version of gcc.
    SmallString<128> CompilerSupportDir(GCCInstallation.getInstallPath());
    addPathIfExists(D, CompilerSupportDir, getFilePaths());
  }
  // libstd++ and libc++ must both be found in this one place.
  addPathIfExists(D, D.Dir + "/../sparc-myriad-elf/lib", getFilePaths());
}

int parseCoverageFeatures(const Driver &D, const llvm::opt::Arg *A) {
  assert(A->getOption().matches(options::OPT_fsanitize_coverage) ||
         A->getOption().matches(options::OPT_fno_sanitize_coverage));
  int Features = 0;
  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
    const char *Value = A->getValue(i);
    int F = llvm::StringSwitch<int>(Value)
        .Case("func", CoverageFunc)
        .Case("bb", CoverageBB)
        .Case("edge", CoverageEdge)
        .Case("indirect-calls", CoverageIndirCall)
        .Case("trace-bb", CoverageTraceBB)
        .Case("trace-cmp", CoverageTraceCmp)
        .Case("trace-div", CoverageTraceDiv)
        .Case("trace-gep", CoverageTraceGep)
        .Case("8bit-counters", Coverage8bitCounters)
        .Case("trace-pc", CoverageTracePC)
        .Default(0);
    if (F == 0)
      D.Diag(clang::diag::err_drv_unsupported_option_argument)
          << A->getOption().getName() << Value;
    Features |= F;
  }
  return Features;
}

void CudaInstallationDetector::AddCudaIncludeArgs(
    const ArgList &DriverArgs, ArgStringList &CC1Args) const {
  if (!DriverArgs.hasArg(options::OPT_nobuiltininc)) {
    // Add cuda_wrappers/* to our system include path.  This lets us wrap
    // standard library headers.
    SmallString<128> P(D.ResourceDir);
    llvm::sys::path::append(P, "include");
    llvm::sys::path::append(P, "cuda_wrappers");
    CC1Args.push_back("-internal-isystem");
    CC1Args.push_back(DriverArgs.MakeArgString(P));
  }

  if (DriverArgs.hasArg(options::OPT_nocudainc))
    return;

  if (!isValid()) {
    D.Diag(diag::err_drv_no_cuda_installation);
    return;
  }

  CC1Args.push_back("-internal-isystem");
  CC1Args.push_back(DriverArgs.MakeArgString(getIncludePath()));
  CC1Args.push_back("-include");
  CC1Args.push_back("__clang_cuda_runtime_wrapper.h");
}

// Select the MIPS float ABI as determined by -msoft-float, -mhard-float,
// and -mfloat-abi=.
mips::FloatABI mips::getMipsFloatABI(const Driver &D, const ArgList &Args) {
  mips::FloatABI ABI = mips::FloatABI::Invalid;
  if (Arg *A =
          Args.getLastArg(options::OPT_msoft_float, options::OPT_mhard_float,
                          options::OPT_mfloat_abi_EQ)) {
    if (A->getOption().matches(options::OPT_msoft_float))
      ABI = mips::FloatABI::Soft;
    else if (A->getOption().matches(options::OPT_mhard_float))
      ABI = mips::FloatABI::Hard;
    else {
      ABI = llvm::StringSwitch<mips::FloatABI>(A->getValue())
                .Case("soft", mips::FloatABI::Soft)
                .Case("hard", mips::FloatABI::Hard)
                .Default(mips::FloatABI::Invalid);
      if (ABI == mips::FloatABI::Invalid && !StringRef(A->getValue()).empty()) {
        D.Diag(clang::diag::err_drv_invalid_mfloat_abi) << A->getAsString(Args);
        ABI = mips::FloatABI::Hard;
      }
    }
  }

  // If unspecified, choose the default based on the platform.
  if (ABI == mips::FloatABI::Invalid) {
    // Assume "hard", because it's a default value used by gcc.
    // When we start to recognize specific target MIPS processors,
    // we will be able to select the default more correctly.
    ABI = mips::FloatABI::Hard;
  }

  assert(ABI != mips::FloatABI::Invalid && "must select an ABI");
  return ABI;
}

SanitizerMask parseArgValues(const Driver &D, const llvm::opt::Arg *A,
                             bool DiagnoseErrors) {
  assert((A->getOption().matches(options::OPT_fsanitize_EQ) ||
          A->getOption().matches(options::OPT_fno_sanitize_EQ) ||
          A->getOption().matches(options::OPT_fsanitize_recover_EQ) ||
          A->getOption().matches(options::OPT_fno_sanitize_recover_EQ) ||
          A->getOption().matches(options::OPT_fsanitize_trap_EQ) ||
          A->getOption().matches(options::OPT_fno_sanitize_trap_EQ)) &&
         "Invalid argument in parseArgValues!");
  SanitizerMask Kinds = 0;
  for (int i = 0, n = A->getNumValues(); i != n; ++i) {
    const char *Value = A->getValue(i);
    SanitizerMask Kind;
    // Special case: don't accept -fsanitize=all.
    if (A->getOption().matches(options::OPT_fsanitize_EQ) &&
        0 == strcmp("all", Value))
      Kind = 0;
    else
      Kind = parseSanitizerValue(Value, /*AllowGroups=*/true);

    if (Kind)
      Kinds |= Kind;
    else if (DiagnoseErrors)
      D.Diag(clang::diag::err_drv_unsupported_option_argument)
          << A->getOption().getName() << Value;
  }
  return Kinds;
}

// Handle -mfpu=.
static void getARMFPUFeatures(const Driver &D, const Arg *A,
                              const ArgList &Args, StringRef FPU,
                              std::vector<StringRef> &Features) {
  unsigned FPUID = llvm::ARM::parseFPU(FPU);
  if (!llvm::ARM::getFPUFeatures(FPUID, Features))
    D.Diag(clang::diag::err_drv_clang_unsupported) << A->getAsString(Args);
}

// Handle -mhwdiv=.
// FIXME: Use ARMTargetParser.
static void getARMHWDivFeatures(const Driver &D, const Arg *A,
                                const ArgList &Args, StringRef HWDiv,
                                std::vector<StringRef> &Features) {
  unsigned HWDivID = llvm::ARM::parseHWDiv(HWDiv);
  if (!llvm::ARM::getHWDivFeatures(HWDivID, Features))
    D.Diag(clang::diag::err_drv_clang_unsupported) << A->getAsString(Args);
}

ppc::FloatABI ppc::getPPCFloatABI(const Driver &D, const ArgList &Args) {
  ppc::FloatABI ABI = ppc::FloatABI::Invalid;
  if (Arg *A =
          Args.getLastArg(options::OPT_msoft_float, options::OPT_mhard_float,
                          options::OPT_mfloat_abi_EQ)) {
    if (A->getOption().matches(options::OPT_msoft_float))
      ABI = ppc::FloatABI::Soft;
    else if (A->getOption().matches(options::OPT_mhard_float))
      ABI = ppc::FloatABI::Hard;
    else {
      ABI = llvm::StringSwitch<ppc::FloatABI>(A->getValue())
                .Case("soft", ppc::FloatABI::Soft)
                .Case("hard", ppc::FloatABI::Hard)
                .Default(ppc::FloatABI::Invalid);
      if (ABI == ppc::FloatABI::Invalid && !StringRef(A->getValue()).empty()) {
        D.Diag(clang::diag::err_drv_invalid_mfloat_abi) << A->getAsString(Args);
        ABI = ppc::FloatABI::Hard;
      }
    }
  }

  // If unspecified, choose the default based on the platform.
  if (ABI == ppc::FloatABI::Invalid) {
    ABI = ppc::FloatABI::Hard;
  }

  return ABI;
}

static void handleHVXWarnings(const Driver &D, const ArgList &Args) {
  // Handle the unsupported values passed to mhvx-length.
  if (Arg *A = Args.getLastArg(options::OPT_mhexagon_hvx_length_EQ)) {
    StringRef Val = A->getValue();
    if (!Val.equals_lower("64b") && !Val.equals_lower("128b"))
      D.Diag(diag::err_drv_unsupported_option_argument)
          << A->getOption().getName() << Val;
  }
}

unsigned tools::getLTOParallelism(const ArgList &Args, const Driver &D) {
  unsigned Parallelism = 0;
  Arg *LtoJobsArg = Args.getLastArg(options::OPT_flto_jobs_EQ);
  if (LtoJobsArg &&
      StringRef(LtoJobsArg->getValue()).getAsInteger(10, Parallelism))
    D.Diag(diag::err_drv_invalid_int_value) << LtoJobsArg->getAsString(Args)
                                            << LtoJobsArg->getValue();
  return Parallelism;
}

ToolChain::ToolChain(const Driver &D, const llvm::Triple &T,
                     const ArgList &Args)
    : D(D), Triple(T), Args(Args), CachedRTTIArg(GetRTTIArgument(Args)),
      CachedRTTIMode(CalculateRTTIMode(Args, Triple, CachedRTTIArg)) {
  if (Arg *A = Args.getLastArg(options::OPT_mthread_model))
    if (!isThreadModelSupported(A->getValue()))
      D.Diag(diag::err_drv_invalid_thread_model_for_target)
          << A->getValue() << A->getAsString(Args);
}

void aarch64::getAArch64TargetFeatures(const Driver &D, const ArgList &Args,
                                       std::vector<StringRef> &Features) {
  Arg *A;
  bool success = true;
  // Enable NEON by default.
  Features.push_back("+neon");
  if ((A = Args.getLastArg(options::OPT_march_EQ)))
    success = getAArch64ArchFeaturesFromMarch(D, A->getValue(), Args, Features);
  else if ((A = Args.getLastArg(options::OPT_mcpu_EQ)))
    success = getAArch64ArchFeaturesFromMcpu(D, A->getValue(), Args, Features);
  else if (Args.hasArg(options::OPT_arch))
    success = getAArch64ArchFeaturesFromMcpu(D, getAArch64TargetCPU(Args, A),
                                             Args, Features);

  if (success && (A = Args.getLastArg(clang::driver::options::OPT_mtune_EQ)))
    success =
        getAArch64MicroArchFeaturesFromMtune(D, A->getValue(), Args, Features);
  else if (success && (A = Args.getLastArg(options::OPT_mcpu_EQ)))
    success =
        getAArch64MicroArchFeaturesFromMcpu(D, A->getValue(), Args, Features);
  else if (success && Args.hasArg(options::OPT_arch))
    success = getAArch64MicroArchFeaturesFromMcpu(
        D, getAArch64TargetCPU(Args, A), Args, Features);

  if (!success)
    D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);

  if (Args.getLastArg(options::OPT_mgeneral_regs_only)) {
    Features.push_back("-fp-armv8");
    Features.push_back("-crypto");
    Features.push_back("-neon");
  }

  // En/disable crc
  if (Arg *A = Args.getLastArg(options::OPT_mcrc, options::OPT_mnocrc)) {
    if (A->getOption().matches(options::OPT_mcrc))
      Features.push_back("+crc");
    else
      Features.push_back("-crc");
  }

  if (Arg *A = Args.getLastArg(options::OPT_mno_unaligned_access,
                               options::OPT_munaligned_access))
    if (A->getOption().matches(options::OPT_mno_unaligned_access))
      Features.push_back("+strict-align");

  if (Args.hasArg(options::OPT_ffixed_x18))
    Features.push_back("+reserve-x18");

  if (Args.hasArg(options::OPT_ffixed_x20))
    Features.push_back("+reserve-x20");

  if (Args.hasArg(options::OPT_mno_neg_immediates))
    Features.push_back("+no-neg-immediates");
}

// Check -mcpu=. Needs ArchName to handle -mcpu=generic.
static void checkARMCPUName(const Driver &D, const Arg *A, const ArgList &Args,
                            llvm::StringRef CPUName, llvm::StringRef ArchName,
                            std::vector<StringRef> &Features,
                            const llvm::Triple &Triple) {
  std::pair<StringRef, StringRef> Split = CPUName.split("+");

  std::string CPU = arm::getARMTargetCPU(CPUName, ArchName, Triple);
  if (arm::getLLVMArchSuffixForARM(CPU, ArchName, Triple).empty() ||
      (Split.second.size() && !DecodeARMFeatures(D, Split.second, Features)))
    D.Diag(clang::diag::err_drv_clang_unsupported) << A->getAsString(Args);
}

// Check if -march is valid by checking if it can be canonicalised and parsed.
// getARMArch is used here instead of just checking the -march value in order
// to handle -march=native correctly.
static void checkARMArchName(const Driver &D, const Arg *A, const ArgList &Args,
                             llvm::StringRef ArchName,
                             std::vector<StringRef> &Features,
                             const llvm::Triple &Triple) {
  std::pair<StringRef, StringRef> Split = ArchName.split("+");

  std::string MArch = arm::getARMArch(ArchName, Triple);
  if (llvm::ARM::parseArch(MArch) == llvm::ARM::ArchKind::INVALID ||
      (Split.second.size() && !DecodeARMFeatures(D, Split.second, Features)))
    D.Diag(clang::diag::err_drv_clang_unsupported) << A->getAsString(Args);
}