//===----------------------------------------------------------------------===//
#include "llvm/ADT/Triple.h"
+#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/StringSwitch.h"
-#include "llvm/ADT/STLExtras.h"
#include "llvm/Support/ErrorHandling.h"
#include <cstring>
using namespace llvm;
switch (Kind) {
case UnknownArch: return "unknown";
- case arm: return "arm";
- case hexagon: return "hexagon";
- case mips: return "mips";
- case mipsel: return "mipsel";
- case mips64: return "mips64";
- case mips64el:return "mips64el";
- case msp430: return "msp430";
- case ppc64: return "powerpc64";
- case ppc: return "powerpc";
- case r600: return "r600";
- case sparc: return "sparc";
- case sparcv9: return "sparcv9";
- case tce: return "tce";
- case thumb: return "thumb";
- case x86: return "i386";
- case x86_64: return "x86_64";
- case xcore: return "xcore";
- case mblaze: return "mblaze";
- case nvptx: return "nvptx";
- case nvptx64: return "nvptx64";
- case le32: return "le32";
- case amdil: return "amdil";
- case spir: return "spir";
+ case aarch64: return "aarch64";
+ case aarch64_be: return "aarch64_be";
+ case arm: return "arm";
+ case armeb: return "armeb";
+ case hexagon: return "hexagon";
+ case mips: return "mips";
+ case mipsel: return "mipsel";
+ case mips64: return "mips64";
+ case mips64el: return "mips64el";
+ case msp430: return "msp430";
+ case ppc64: return "powerpc64";
+ case ppc64le: return "powerpc64le";
+ case ppc: return "powerpc";
+ case r600: return "r600";
+ case sparc: return "sparc";
+ case sparcv9: return "sparcv9";
+ case systemz: return "s390x";
+ case tce: return "tce";
+ case thumb: return "thumb";
+ case thumbeb: return "thumbeb";
+ case x86: return "i386";
+ case x86_64: return "x86_64";
+ case xcore: return "xcore";
+ case nvptx: return "nvptx";
+ case nvptx64: return "nvptx64";
+ case le32: return "le32";
+ case amdil: return "amdil";
+ case spir: return "spir";
+ case spir64: return "spir64";
+ case kalimba: return "kalimba";
}
llvm_unreachable("Invalid ArchType!");
const char *Triple::getArchTypePrefix(ArchType Kind) {
switch (Kind) {
default:
- return 0;
+ return nullptr;
+
+ case aarch64:
+ case aarch64_be: return "aarch64";
case arm:
- case thumb: return "arm";
+ case armeb:
+ case thumb:
+ case thumbeb: return "arm";
case ppc64:
- case ppc: return "ppc";
-
- case mblaze: return "mblaze";
+ case ppc64le:
+ case ppc: return "ppc";
case mips:
case mipsel:
case mips64:
- case mips64el:return "mips";
+ case mips64el: return "mips";
- case hexagon: return "hexagon";
+ case hexagon: return "hexagon";
- case r600: return "r600";
+ case r600: return "r600";
case sparcv9:
- case sparc: return "sparc";
+ case sparc: return "sparc";
+
+ case systemz: return "systemz";
case x86:
- case x86_64: return "x86";
+ case x86_64: return "x86";
- case xcore: return "xcore";
+ case xcore: return "xcore";
- case nvptx: return "nvptx";
- case nvptx64: return "nvptx";
- case le32: return "le32";
- case amdil: return "amdil";
- case spir: return "spir";
+ case nvptx: return "nvptx";
+ case nvptx64: return "nvptx";
+
+ case le32: return "le32";
+ case amdil: return "amdil";
+ case spir: return "spir";
+ case spir64: return "spir";
+ case kalimba: return "kalimba";
}
}
case BGQ: return "bgq";
case Freescale: return "fsl";
case IBM: return "ibm";
+ case ImaginationTechnologies: return "img";
+ case MipsTechnologies: return "mti";
+ case NVIDIA: return "nvidia";
+ case CSR: return "csr";
}
llvm_unreachable("Invalid VendorType!");
switch (Kind) {
case UnknownOS: return "unknown";
- case AuroraUX: return "auroraux";
- case Cygwin: return "cygwin";
case Darwin: return "darwin";
case DragonFly: return "dragonfly";
case FreeBSD: return "freebsd";
case Linux: return "linux";
case Lv2: return "lv2";
case MacOSX: return "macosx";
- case MinGW32: return "mingw32";
case NetBSD: return "netbsd";
case OpenBSD: return "openbsd";
case Solaris: return "solaris";
- case Win32: return "win32";
+ case Win32: return "windows";
case Haiku: return "haiku";
case Minix: return "minix";
case RTEMS: return "rtems";
- case NativeClient: return "nacl";
+ case NaCl: return "nacl";
case CNK: return "cnk";
case Bitrig: return "bitrig";
case AIX: return "aix";
+ case CUDA: return "cuda";
+ case NVCL: return "nvcl";
}
llvm_unreachable("Invalid OSType");
case GNU: return "gnu";
case GNUEABIHF: return "gnueabihf";
case GNUEABI: return "gnueabi";
+ case GNUX32: return "gnux32";
+ case CODE16: return "code16";
case EABI: return "eabi";
- case MachO: return "macho";
+ case EABIHF: return "eabihf";
case Android: return "android";
- case ELF: return "elf";
+ case MSVC: return "msvc";
+ case Itanium: return "itanium";
+ case Cygnus: return "cygnus";
}
llvm_unreachable("Invalid EnvironmentType!");
Triple::ArchType Triple::getArchTypeForLLVMName(StringRef Name) {
return StringSwitch<Triple::ArchType>(Name)
+ .Case("aarch64", aarch64)
+ .Case("aarch64_be", aarch64_be)
+ .Case("arm64", aarch64) // "arm64" is an alias for "aarch64"
.Case("arm", arm)
+ .Case("armeb", armeb)
.Case("mips", mips)
.Case("mipsel", mipsel)
.Case("mips64", mips64)
.Case("ppc64", ppc64)
.Case("ppc32", ppc)
.Case("ppc", ppc)
- .Case("mblaze", mblaze)
+ .Case("ppc64le", ppc64le)
.Case("r600", r600)
.Case("hexagon", hexagon)
.Case("sparc", sparc)
.Case("sparcv9", sparcv9)
+ .Case("systemz", systemz)
.Case("tce", tce)
.Case("thumb", thumb)
+ .Case("thumbeb", thumbeb)
.Case("x86", x86)
.Case("x86-64", x86_64)
.Case("xcore", xcore)
.Case("le32", le32)
.Case("amdil", amdil)
.Case("spir", spir)
+ .Case("spir64", spir64)
+ .Case("kalimba", kalimba)
.Default(UnknownArch);
}
-// Returns architecture name that is understood by the target assembler.
-const char *Triple::getArchNameForAssembler() {
- if (!isOSDarwin() && getVendor() != Triple::Apple)
- return NULL;
-
- return StringSwitch<const char*>(getArchName())
- .Case("i386", "i386")
- .Case("x86_64", "x86_64")
- .Case("powerpc", "ppc")
- .Case("powerpc64", "ppc64")
- .Cases("mblaze", "microblaze", "mblaze")
- .Case("arm", "arm")
- .Cases("armv4t", "thumbv4t", "armv4t")
- .Cases("armv5", "armv5e", "thumbv5", "thumbv5e", "armv5")
- .Cases("armv6", "thumbv6", "armv6")
- .Cases("armv7", "thumbv7", "armv7")
- .Case("r600", "r600")
- .Case("nvptx", "nvptx")
- .Case("nvptx64", "nvptx64")
- .Case("le32", "le32")
- .Case("amdil", "amdil")
- .Case("spir", "spir")
- .Default(NULL);
-}
-
static Triple::ArchType parseArch(StringRef ArchName) {
return StringSwitch<Triple::ArchType>(ArchName)
.Cases("i386", "i486", "i586", "i686", Triple::x86)
// FIXME: Do we need to support these?
.Cases("i786", "i886", "i986", Triple::x86)
- .Cases("amd64", "x86_64", Triple::x86_64)
+ .Cases("amd64", "x86_64", "x86_64h", Triple::x86_64)
.Case("powerpc", Triple::ppc)
.Cases("powerpc64", "ppu", Triple::ppc64)
- .Case("mblaze", Triple::mblaze)
+ .Case("powerpc64le", Triple::ppc64le)
+ .Case("aarch64", Triple::aarch64)
+ .Case("aarch64_be", Triple::aarch64_be)
+ .Case("arm64", Triple::aarch64)
.Cases("arm", "xscale", Triple::arm)
// FIXME: It would be good to replace these with explicit names for all the
// various suffixes supported.
.StartsWith("armv", Triple::arm)
+ .Case("armeb", Triple::armeb)
+ .StartsWith("armebv", Triple::armeb)
.Case("thumb", Triple::thumb)
.StartsWith("thumbv", Triple::thumb)
+ .Case("thumbeb", Triple::thumbeb)
+ .StartsWith("thumbebv", Triple::thumbeb)
.Case("msp430", Triple::msp430)
.Cases("mips", "mipseb", "mipsallegrex", Triple::mips)
.Cases("mipsel", "mipsallegrexel", Triple::mipsel)
.Case("mips64el", Triple::mips64el)
.Case("r600", Triple::r600)
.Case("hexagon", Triple::hexagon)
+ .Case("s390x", Triple::systemz)
.Case("sparc", Triple::sparc)
- .Case("sparcv9", Triple::sparcv9)
+ .Cases("sparcv9", "sparc64", Triple::sparcv9)
.Case("tce", Triple::tce)
.Case("xcore", Triple::xcore)
.Case("nvptx", Triple::nvptx)
.Case("le32", Triple::le32)
.Case("amdil", Triple::amdil)
.Case("spir", Triple::spir)
+ .Case("spir64", Triple::spir64)
+ .Case("kalimba", Triple::kalimba)
.Default(Triple::UnknownArch);
}
.Case("bgq", Triple::BGQ)
.Case("fsl", Triple::Freescale)
.Case("ibm", Triple::IBM)
+ .Case("img", Triple::ImaginationTechnologies)
+ .Case("mti", Triple::MipsTechnologies)
+ .Case("nvidia", Triple::NVIDIA)
+ .Case("csr", Triple::CSR)
.Default(Triple::UnknownVendor);
}
static Triple::OSType parseOS(StringRef OSName) {
return StringSwitch<Triple::OSType>(OSName)
- .StartsWith("auroraux", Triple::AuroraUX)
- .StartsWith("cygwin", Triple::Cygwin)
.StartsWith("darwin", Triple::Darwin)
.StartsWith("dragonfly", Triple::DragonFly)
.StartsWith("freebsd", Triple::FreeBSD)
.StartsWith("linux", Triple::Linux)
.StartsWith("lv2", Triple::Lv2)
.StartsWith("macosx", Triple::MacOSX)
- .StartsWith("mingw32", Triple::MinGW32)
.StartsWith("netbsd", Triple::NetBSD)
.StartsWith("openbsd", Triple::OpenBSD)
.StartsWith("solaris", Triple::Solaris)
.StartsWith("win32", Triple::Win32)
+ .StartsWith("windows", Triple::Win32)
.StartsWith("haiku", Triple::Haiku)
.StartsWith("minix", Triple::Minix)
.StartsWith("rtems", Triple::RTEMS)
- .StartsWith("nacl", Triple::NativeClient)
+ .StartsWith("nacl", Triple::NaCl)
.StartsWith("cnk", Triple::CNK)
.StartsWith("bitrig", Triple::Bitrig)
.StartsWith("aix", Triple::AIX)
+ .StartsWith("cuda", Triple::CUDA)
+ .StartsWith("nvcl", Triple::NVCL)
.Default(Triple::UnknownOS);
}
static Triple::EnvironmentType parseEnvironment(StringRef EnvironmentName) {
return StringSwitch<Triple::EnvironmentType>(EnvironmentName)
+ .StartsWith("eabihf", Triple::EABIHF)
.StartsWith("eabi", Triple::EABI)
.StartsWith("gnueabihf", Triple::GNUEABIHF)
.StartsWith("gnueabi", Triple::GNUEABI)
+ .StartsWith("gnux32", Triple::GNUX32)
+ .StartsWith("code16", Triple::CODE16)
.StartsWith("gnu", Triple::GNU)
- .StartsWith("macho", Triple::MachO)
.StartsWith("android", Triple::Android)
- .StartsWith("elf", Triple::ELF)
+ .StartsWith("msvc", Triple::MSVC)
+ .StartsWith("itanium", Triple::Itanium)
+ .StartsWith("cygnus", Triple::Cygnus)
.Default(Triple::UnknownEnvironment);
}
+static Triple::ObjectFormatType parseFormat(StringRef EnvironmentName) {
+ return StringSwitch<Triple::ObjectFormatType>(EnvironmentName)
+ .EndsWith("coff", Triple::COFF)
+ .EndsWith("elf", Triple::ELF)
+ .EndsWith("macho", Triple::MachO)
+ .Default(Triple::UnknownObjectFormat);
+}
+
+static Triple::SubArchType parseSubArch(StringRef SubArchName) {
+ return StringSwitch<Triple::SubArchType>(SubArchName)
+ .EndsWith("v8", Triple::ARMSubArch_v8)
+ .EndsWith("v8a", Triple::ARMSubArch_v8)
+ .EndsWith("v7", Triple::ARMSubArch_v7)
+ .EndsWith("v7a", Triple::ARMSubArch_v7)
+ .EndsWith("v7em", Triple::ARMSubArch_v7em)
+ .EndsWith("v7l", Triple::ARMSubArch_v7)
+ .EndsWith("v7m", Triple::ARMSubArch_v7m)
+ .EndsWith("v7r", Triple::ARMSubArch_v7)
+ .EndsWith("v7s", Triple::ARMSubArch_v7s)
+ .EndsWith("v6", Triple::ARMSubArch_v6)
+ .EndsWith("v6m", Triple::ARMSubArch_v6m)
+ .EndsWith("v6t2", Triple::ARMSubArch_v6t2)
+ .EndsWith("v5", Triple::ARMSubArch_v5)
+ .EndsWith("v5e", Triple::ARMSubArch_v5)
+ .EndsWith("v5t", Triple::ARMSubArch_v5)
+ .EndsWith("v5te", Triple::ARMSubArch_v5te)
+ .EndsWith("v4t", Triple::ARMSubArch_v4t)
+ .Default(Triple::NoSubArch);
+}
+
+static const char *getObjectFormatTypeName(Triple::ObjectFormatType Kind) {
+ switch (Kind) {
+ case Triple::UnknownObjectFormat: return "";
+ case Triple::COFF: return "coff";
+ case Triple::ELF: return "elf";
+ case Triple::MachO: return "macho";
+ }
+ llvm_unreachable("unknown object format type");
+}
+
+static Triple::ObjectFormatType getDefaultFormat(const Triple &T) {
+ if (T.isOSDarwin())
+ return Triple::MachO;
+ else if (T.isOSWindows())
+ return Triple::COFF;
+ return Triple::ELF;
+}
+
/// \brief Construct a triple from the string representation provided.
///
/// This stores the string representation and parses the various pieces into
Triple::Triple(const Twine &Str)
: Data(Str.str()),
Arch(parseArch(getArchName())),
+ SubArch(parseSubArch(getArchName())),
Vendor(parseVendor(getVendorName())),
OS(parseOS(getOSName())),
- Environment(parseEnvironment(getEnvironmentName())) {
+ Environment(parseEnvironment(getEnvironmentName())),
+ ObjectFormat(parseFormat(getEnvironmentName())) {
+ if (ObjectFormat == Triple::UnknownObjectFormat)
+ ObjectFormat = getDefaultFormat(*this);
}
/// \brief Construct a triple from string representations of the architecture,
Triple::Triple(const Twine &ArchStr, const Twine &VendorStr, const Twine &OSStr)
: Data((ArchStr + Twine('-') + VendorStr + Twine('-') + OSStr).str()),
Arch(parseArch(ArchStr.str())),
+ SubArch(parseSubArch(ArchStr.str())),
Vendor(parseVendor(VendorStr.str())),
OS(parseOS(OSStr.str())),
- Environment() {
+ Environment(), ObjectFormat(Triple::UnknownObjectFormat) {
+ ObjectFormat = getDefaultFormat(*this);
}
/// \brief Construct a triple from string representations of the architecture,
: Data((ArchStr + Twine('-') + VendorStr + Twine('-') + OSStr + Twine('-') +
EnvironmentStr).str()),
Arch(parseArch(ArchStr.str())),
+ SubArch(parseSubArch(ArchStr.str())),
Vendor(parseVendor(VendorStr.str())),
OS(parseOS(OSStr.str())),
- Environment(parseEnvironment(EnvironmentStr.str())) {
+ Environment(parseEnvironment(EnvironmentStr.str())),
+ ObjectFormat(parseFormat(EnvironmentStr.str())) {
+ if (ObjectFormat == Triple::UnknownObjectFormat)
+ ObjectFormat = getDefaultFormat(*this);
}
std::string Triple::normalize(StringRef Str) {
+ bool IsMinGW32 = false;
+ bool IsCygwin = false;
+
// Parse into components.
SmallVector<StringRef, 4> Components;
Str.split(Components, "-");
if (Components.size() > 1)
Vendor = parseVendor(Components[1]);
OSType OS = UnknownOS;
- if (Components.size() > 2)
+ if (Components.size() > 2) {
OS = parseOS(Components[2]);
+ IsCygwin = Components[2].startswith("cygwin");
+ IsMinGW32 = Components[2].startswith("mingw");
+ }
EnvironmentType Environment = UnknownEnvironment;
if (Components.size() > 3)
Environment = parseEnvironment(Components[3]);
+ ObjectFormatType ObjectFormat = UnknownObjectFormat;
+ if (Components.size() > 4)
+ ObjectFormat = parseFormat(Components[4]);
// Note which components are already in their final position. These will not
// be moved.
break;
case 2:
OS = parseOS(Comp);
- Valid = OS != UnknownOS;
+ IsCygwin = Comp.startswith("cygwin");
+ IsMinGW32 = Comp.startswith("mingw");
+ Valid = OS != UnknownOS || IsCygwin || IsMinGW32;
break;
case 3:
Environment = parseEnvironment(Comp);
Valid = Environment != UnknownEnvironment;
+ if (!Valid) {
+ ObjectFormat = parseFormat(Comp);
+ Valid = ObjectFormat != UnknownObjectFormat;
+ }
break;
}
if (!Valid)
// Special case logic goes here. At this point Arch, Vendor and OS have the
// correct values for the computed components.
+ if (OS == Triple::Win32) {
+ Components.resize(4);
+ Components[2] = "windows";
+ if (Environment == UnknownEnvironment) {
+ if (ObjectFormat == UnknownObjectFormat || ObjectFormat == Triple::COFF)
+ Components[3] = "msvc";
+ else
+ Components[3] = getObjectFormatTypeName(ObjectFormat);
+ }
+ } else if (IsMinGW32) {
+ Components.resize(4);
+ Components[2] = "windows";
+ Components[3] = "gnu";
+ } else if (IsCygwin) {
+ Components.resize(4);
+ Components[2] = "windows";
+ Components[3] = "cygnus";
+ }
+ if (IsMinGW32 || IsCygwin ||
+ (OS == Triple::Win32 && Environment != UnknownEnvironment)) {
+ if (ObjectFormat != UnknownObjectFormat && ObjectFormat != Triple::COFF) {
+ Components.resize(5);
+ Components[4] = getObjectFormatTypeName(ObjectFormat);
+ }
+ }
+
// Stick the corrected components back together to form the normalized string.
std::string Normalized;
for (unsigned i = 0, e = Components.size(); i != e; ++i) {
// the clang driver combines OS X and IOS support into a common Darwin
// toolchain that wants to know the iOS version number even when targeting
// OS X.
- Major = 3;
+ Major = 5;
Minor = 0;
Micro = 0;
break;
case IOS:
getOSVersion(Major, Minor, Micro);
- // Default to 3.0.
+ // Default to 5.0 (or 7.0 for arm64).
if (Major == 0)
- Major = 3;
+ Major = (getArch() == aarch64) ? 7 : 5;
break;
}
}
setEnvironmentName(getEnvironmentTypeName(Kind));
}
+void Triple::setObjectFormat(ObjectFormatType Kind) {
+ if (Environment == UnknownEnvironment)
+ return setEnvironmentName(getObjectFormatTypeName(Kind));
+
+ setEnvironmentName((getEnvironmentTypeName(Environment) + Twine("-") +
+ getObjectFormatTypeName(Kind)).str());
+}
+
void Triple::setArchName(StringRef Str) {
// Work around a miscompilation bug for Twines in gcc 4.0.3.
SmallString<64> Triple;
static unsigned getArchPointerBitWidth(llvm::Triple::ArchType Arch) {
switch (Arch) {
- case llvm::Triple::spir:
case llvm::Triple::UnknownArch:
return 0;
case llvm::Triple::amdil:
case llvm::Triple::arm:
+ case llvm::Triple::armeb:
case llvm::Triple::hexagon:
case llvm::Triple::le32:
- case llvm::Triple::mblaze:
case llvm::Triple::mips:
case llvm::Triple::mipsel:
case llvm::Triple::nvptx:
case llvm::Triple::sparc:
case llvm::Triple::tce:
case llvm::Triple::thumb:
+ case llvm::Triple::thumbeb:
case llvm::Triple::x86:
case llvm::Triple::xcore:
+ case llvm::Triple::spir:
+ case llvm::Triple::kalimba:
return 32;
+ case llvm::Triple::aarch64:
+ case llvm::Triple::aarch64_be:
case llvm::Triple::mips64:
case llvm::Triple::mips64el:
case llvm::Triple::nvptx64:
case llvm::Triple::ppc64:
+ case llvm::Triple::ppc64le:
case llvm::Triple::sparcv9:
+ case llvm::Triple::systemz:
case llvm::Triple::x86_64:
+ case llvm::Triple::spir64:
return 64;
}
llvm_unreachable("Invalid architecture value");
Triple T(*this);
switch (getArch()) {
case Triple::UnknownArch:
+ case Triple::aarch64:
+ case Triple::aarch64_be:
case Triple::msp430:
+ case Triple::systemz:
+ case Triple::ppc64le:
T.setArch(UnknownArch);
break;
case Triple::amdil:
case Triple::spir:
case Triple::arm:
+ case Triple::armeb:
case Triple::hexagon:
+ case Triple::kalimba:
case Triple::le32:
- case Triple::mblaze:
case Triple::mips:
case Triple::mipsel:
case Triple::nvptx:
case Triple::sparc:
case Triple::tce:
case Triple::thumb:
+ case Triple::thumbeb:
case Triple::x86:
case Triple::xcore:
// Already 32-bit.
case Triple::mips64: T.setArch(Triple::mips); break;
case Triple::mips64el: T.setArch(Triple::mipsel); break;
case Triple::nvptx64: T.setArch(Triple::nvptx); break;
- case Triple::ppc64: T.setArch(Triple::ppc); break;
+ case Triple::ppc64: T.setArch(Triple::ppc); break;
case Triple::sparcv9: T.setArch(Triple::sparc); break;
case Triple::x86_64: T.setArch(Triple::x86); break;
+ case Triple::spir64: T.setArch(Triple::spir); break;
}
return T;
}
case Triple::UnknownArch:
case Triple::amdil:
case Triple::arm:
+ case Triple::armeb:
case Triple::hexagon:
+ case Triple::kalimba:
case Triple::le32:
- case Triple::mblaze:
case Triple::msp430:
case Triple::r600:
case Triple::tce:
case Triple::thumb:
+ case Triple::thumbeb:
case Triple::xcore:
T.setArch(UnknownArch);
break;
- case Triple::spir:
+ case Triple::aarch64:
+ case Triple::aarch64_be:
+ case Triple::spir64:
case Triple::mips64:
case Triple::mips64el:
case Triple::nvptx64:
case Triple::ppc64:
+ case Triple::ppc64le:
case Triple::sparcv9:
+ case Triple::systemz:
case Triple::x86_64:
// Already 64-bit.
break;
case Triple::ppc: T.setArch(Triple::ppc64); break;
case Triple::sparc: T.setArch(Triple::sparcv9); break;
case Triple::x86: T.setArch(Triple::x86_64); break;
+ case Triple::spir: T.setArch(Triple::spir64); break;
}
return T;
}
+
+// FIXME: tblgen this.
+const char *Triple::getARMCPUForArch(StringRef MArch) const {
+ if (MArch.empty())
+ MArch = getArchName();
+
+ switch (getOS()) {
+ case llvm::Triple::NetBSD:
+ if (MArch == "armv6")
+ return "arm1176jzf-s";
+ break;
+ case llvm::Triple::Win32:
+ // FIXME: this is invalid for WindowsCE
+ return "cortex-a9";
+ default:
+ break;
+ }
+
+ const char *result = nullptr;
+ size_t offset = StringRef::npos;
+ if (MArch.startswith("arm"))
+ offset = 3;
+ if (MArch.startswith("thumb"))
+ offset = 5;
+ if (offset != StringRef::npos && MArch.substr(offset, 2) == "eb")
+ offset += 2;
+ if (offset != StringRef::npos)
+ result = llvm::StringSwitch<const char *>(MArch.substr(offset))
+ .Cases("v2", "v2a", "arm2")
+ .Case("v3", "arm6")
+ .Case("v3m", "arm7m")
+ .Case("v4", "strongarm")
+ .Case("v4t", "arm7tdmi")
+ .Cases("v5", "v5t", "arm10tdmi")
+ .Cases("v5e", "v5te", "arm1022e")
+ .Case("v5tej", "arm926ej-s")
+ .Cases("v6", "v6k", "arm1136jf-s")
+ .Case("v6j", "arm1136j-s")
+ .Cases("v6z", "v6zk", "arm1176jzf-s")
+ .Case("v6t2", "arm1156t2-s")
+ .Cases("v6m", "v6-m", "cortex-m0")
+ .Cases("v7", "v7a", "v7-a", "v7l", "v7-l", "cortex-a8")
+ .Cases("v7s", "v7-s", "swift")
+ .Cases("v7r", "v7-r", "cortex-r4")
+ .Cases("v7m", "v7-m", "cortex-m3")
+ .Cases("v7em", "v7e-m", "cortex-m4")
+ .Cases("v8", "v8a", "v8-a", "cortex-a53")
+ .Default(nullptr);
+ else
+ result = llvm::StringSwitch<const char *>(MArch)
+ .Case("ep9312", "ep9312")
+ .Case("iwmmxt", "iwmmxt")
+ .Case("xscale", "xscale")
+ .Default(nullptr);
+
+ if (result)
+ return result;
+
+ // If all else failed, return the most base CPU with thumb interworking
+ // supported by LLVM.
+ // FIXME: Should warn once that we're falling back.
+ switch (getOS()) {
+ case llvm::Triple::NetBSD:
+ switch (getEnvironment()) {
+ case llvm::Triple::GNUEABIHF:
+ case llvm::Triple::GNUEABI:
+ case llvm::Triple::EABIHF:
+ case llvm::Triple::EABI:
+ return "arm926ej-s";
+ default:
+ return "strongarm";
+ }
+ default:
+ switch (getEnvironment()) {
+ case llvm::Triple::EABIHF:
+ case llvm::Triple::GNUEABIHF:
+ return "arm1176jzf-s";
+ default:
+ return "arm7tdmi";
+ }
+ }
+}