[LoongArch 1/n] Add triples loongarch{32,64} for the upcoming LoongArch target

[SixWeining]

Summary

This is the first patch to incrementally add an MC layer for LoongArch to LLVM.
This patch also adds unit testcases for these new triples.

[SixWeining]

update

[SixWeining]

update 2

llvm/include/llvm/ADT/Triple.h

 ///
 /// See autoconf/config.guess for a glimpse into what configuration names
 /// look like in practice.
 class Triple {
 public:
   enum ArchType {
     UnknownArch,
 
     arm,            // ARM (little endian): arm, armv.*, xscale
     armeb,          // ARM (big endian): armeb
     aarch64,        // AArch64 (little endian): aarch64
     aarch64_be,     // AArch64 (big endian): aarch64_be
     aarch64_32,     // AArch64 (little endian) ILP32: aarch64_32
     arc,            // ARC: Synopsys ARC
     avr,            // AVR: Atmel AVR microcontroller
     bpfel,          // eBPF or extended BPF or 64-bit BPF (little endian)
     bpfeb,          // eBPF or extended BPF or 64-bit BPF (big endian)
     csky,           // CSKY: csky
     hexagon,        // Hexagon: hexagon
+    loongarch32,    // LoongArch (32-bit): loongarch32
+    loongarch64,    // LoongArch (64-bit): loongarch64
     m68k,           // M68k: Motorola 680x0 family
     mips,           // MIPS: mips, mipsallegrex, mipsr6
     mipsel,         // MIPSEL: mipsel, mipsallegrexe, mipsr6el
     mips64,         // MIPS64: mips64, mips64r6, mipsn32, mipsn32r6
     mips64el,       // MIPS64EL: mips64el, mips64r6el, mipsn32el, mipsn32r6el
     msp430,         // MSP430: msp430
     ppc,            // PPC: powerpc
     ppcle,          // PPCLE: powerpc (little endian)
bool isAArch64(int PointerWidth) const {
     if (!isAArch64())
       return false;
     return getArch() == Triple::aarch64_32 ||
                    getEnvironment() == Triple::GNUILP32
                ? PointerWidth == 32
                : PointerWidth == 64;
   }
 
+  /// Tests whether the target is LoongArch (32- and 64-bit).
+  bool isLoongArch() const {
+    return getArch() == Triple::loongarch32 || getArch() == Triple::loongarch64;
+  }
+
   /// Tests whether the target is MIPS 32-bit (little and big endian).
   bool isMIPS32() const {
     return getArch() == Triple::mips || getArch() == Triple::mipsel;
   }
 
   /// Tests whether the target is MIPS 64-bit (little and big endian).
   bool isMIPS64() const {
     return getArch() == Triple::mips64 || getArch() == Triple::mips64el;

llvm/lib/Support/Triple.cpp

StringRef Triple::getArchTypeName(ArchType Kind) {
   case csky:           return "csky";
   case hexagon:        return "hexagon";
   case hsail64:        return "hsail64";
   case hsail:          return "hsail";
   case kalimba:        return "kalimba";
   case lanai:          return "lanai";
   case le32:           return "le32";
   case le64:           return "le64";
+  case loongarch32:    return "loongarch32";
+  case loongarch64:    return "loongarch64";
   case m68k:           return "m68k";
   case mips64:         return "mips64";
   case mips64el:       return "mips64el";
   case mips:           return "mips";
   case mipsel:         return "mipsel";
   case msp430:         return "msp430";
   case nvptx64:        return "nvptx64";
   case nvptx:          return "nvptx";
StringRef Triple::getArchTypePrefix(ArchType Kind) {
   case wasm32:
   case wasm64:      return "wasm";
 
   case riscv32:
   case riscv64:     return "riscv";
 
   case ve:          return "ve";
   case csky:        return "csky";
+
+  case loongarch32:
+  case loongarch64: return "loongarch";
   }
 }
 
 StringRef Triple::getVendorTypeName(VendorType Kind) {
   switch (Kind) {
   case UnknownVendor: return "unknown";
 
   case AMD: return "amd";
static Triple::ArchType parseBPFArch(StringRef ArchName) {
   } else {
     return Triple::UnknownArch;
   }
 }
 
 Triple::ArchType Triple::getArchTypeForLLVMName(StringRef Name) {
   Triple::ArchType BPFArch(parseBPFArch(Name));
   return StringSwitch<Triple::ArchType>(Name)
     .Case("aarch64", aarch64)
     .Case("aarch64_be", aarch64_be)
     .Case("aarch64_32", aarch64_32)
     .Case("arc", arc)
     .Case("arm64", aarch64) // "arm64" is an alias for "aarch64"
     .Case("arm64_32", aarch64_32)
     .Case("arm", arm)
     .Case("armeb", armeb)
     .Case("avr", avr)
return StringSwitch<Triple::ArchType>(Name)
     .Case("lanai", lanai)
     .Case("shave", shave)
     .Case("wasm32", wasm32)
     .Case("wasm64", wasm64)
     .Case("renderscript32", renderscript32)
     .Case("renderscript64", renderscript64)
     .Case("ve", ve)
     .Case("csky", csky)
+    .Case("loongarch32", loongarch32)
+    .Case("loongarch64", loongarch64)
     .Default(UnknownArch);
 }
 
 static Triple::ArchType parseARMArch(StringRef ArchName) {
   ARM::ISAKind ISA = ARM::parseArchISA(ArchName);
   ARM::EndianKind ENDIAN = ARM::parseArchEndian(ArchName);
 
   Triple::ArchType arch = Triple::UnknownArch;
else
       return Triple::thumb;
   }
 
   return arch;
 }
 
 static Triple::ArchType parseArch(StringRef ArchName) {
   auto AT = 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", "x86_64h", Triple::x86_64)
     .Cases("powerpc", "powerpcspe", "ppc", "ppc32", Triple::ppc)
     .Cases("powerpcle", "ppcle", "ppc32le", Triple::ppcle)
     .Cases("powerpc64", "ppu", "ppc64", Triple::ppc64)
     .Cases("powerpc64le", "ppc64le", Triple::ppc64le)
     .Case("xscale", Triple::arm)
auto AT = StringSwitch<Triple::ArchType>(ArchName)
     .Case("lanai", Triple::lanai)
     .Case("renderscript32", Triple::renderscript32)
     .Case("renderscript64", Triple::renderscript64)
     .Case("shave", Triple::shave)
     .Case("ve", Triple::ve)
     .Case("wasm32", Triple::wasm32)
     .Case("wasm64", Triple::wasm64)
     .Case("csky", Triple::csky)
+    .Case("loongarch32", Triple::loongarch32)
+    .Case("loongarch64", Triple::loongarch64)
     .Default(Triple::UnknownArch);
 
   // Some architectures require special parsing logic just to compute the
   // ArchType result.
   if (AT == Triple::UnknownArch) {
     if (ArchName.startswith("arm") || ArchName.startswith("thumb") ||
         ArchName.startswith("aarch64"))
       return parseARMArch(ArchName);
static Triple::ObjectFormatType getDefaultFormat(const Triple &T) {
   case Triple::csky:
   case Triple::hexagon:
   case Triple::hsail64:
   case Triple::hsail:
   case Triple::kalimba:
   case Triple::lanai:
   case Triple::le32:
   case Triple::le64:
+  case Triple::loongarch32:
+  case Triple::loongarch64:
   case Triple::m68k:
   case Triple::mips64:
   case Triple::mips64el:
   case Triple::mips:
   case Triple::mipsel:
   case Triple::msp430:
   case Triple::nvptx64:
   case Triple::nvptx:
static unsigned getArchPointerBitWidth(llvm::Triple::ArchType Arch) {
   case llvm::Triple::arm:
   case llvm::Triple::armeb:
   case llvm::Triple::csky:
   case llvm::Triple::hexagon:
   case llvm::Triple::hsail:
   case llvm::Triple::kalimba:
   case llvm::Triple::lanai:
   case llvm::Triple::le32:
+  case llvm::Triple::loongarch32:
   case llvm::Triple::m68k:
   case llvm::Triple::mips:
   case llvm::Triple::mipsel:
   case llvm::Triple::nvptx:
   case llvm::Triple::ppc:
   case llvm::Triple::ppcle:
   case llvm::Triple::r600:
   case llvm::Triple::renderscript32:
static unsigned getArchPointerBitWidth(llvm::Triple::ArchType Arch) {
   case llvm::Triple::aarch64:
   case llvm::Triple::aarch64_be:
   case llvm::Triple::amdgcn:
   case llvm::Triple::amdil64:
   case llvm::Triple::bpfeb:
   case llvm::Triple::bpfel:
   case llvm::Triple::hsail64:
   case llvm::Triple::le64:
+  case llvm::Triple::loongarch64:
   case llvm::Triple::mips64:
   case llvm::Triple::mips64el:
   case llvm::Triple::nvptx64:
   case llvm::Triple::ppc64:
   case llvm::Triple::ppc64le:
   case llvm::Triple::renderscript64:
   case llvm::Triple::riscv64:
   case llvm::Triple::sparcv9:
Triple Triple::get32BitArchVariant() const {
   case Triple::arm:
   case Triple::armeb:
   case Triple::csky:
   case Triple::hexagon:
   case Triple::hsail:
   case Triple::kalimba:
   case Triple::lanai:
   case Triple::le32:
+  case Triple::loongarch32:
   case Triple::m68k:
   case Triple::mips:
   case Triple::mipsel:
   case Triple::nvptx:
   case Triple::ppc:
   case Triple::ppcle:
   case Triple::r600:
   case Triple::renderscript32:
case Triple::xcore:
     // Already 32-bit.
     break;
 
   case Triple::aarch64:        T.setArch(Triple::arm);     break;
   case Triple::aarch64_be:     T.setArch(Triple::armeb);   break;
   case Triple::amdil64:        T.setArch(Triple::amdil);   break;
   case Triple::hsail64:        T.setArch(Triple::hsail);   break;
   case Triple::le64:           T.setArch(Triple::le32);    break;
+  case Triple::loongarch64:    T.setArch(Triple::loongarch32); break;
   case Triple::mips64:
     T.setArch(Triple::mips, getSubArch());
     break;
   case Triple::mips64el:
     T.setArch(Triple::mipsel, getSubArch());
     break;
   case Triple::nvptx64:        T.setArch(Triple::nvptx);   break;
   case Triple::ppc64:          T.setArch(Triple::ppc);     break;
Triple Triple::get64BitArchVariant() const {
   case Triple::aarch64:
   case Triple::aarch64_be:
   case Triple::amdgcn:
   case Triple::amdil64:
   case Triple::bpfeb:
   case Triple::bpfel:
   case Triple::hsail64:
   case Triple::le64:
+  case Triple::loongarch64:
   case Triple::mips64:
   case Triple::mips64el:
   case Triple::nvptx64:
   case Triple::ppc64:
   case Triple::ppc64le:
   case Triple::renderscript64:
   case Triple::riscv64:
   case Triple::sparcv9:
   case Triple::spir64:
   case Triple::spirv64:
   case Triple::systemz:
   case Triple::ve:
   case Triple::wasm64:
   case Triple::x86_64:
     // Already 64-bit.
     break;
 
   case Triple::aarch64_32:      T.setArch(Triple::aarch64);    break;
   case Triple::amdil:           T.setArch(Triple::amdil64);    break;
   case Triple::arm:             T.setArch(Triple::aarch64);    break;
   case Triple::armeb:           T.setArch(Triple::aarch64_be); break;
   case Triple::hsail:           T.setArch(Triple::hsail64);    break;
   case Triple::le32:            T.setArch(Triple::le64);       break;
+  case Triple::loongarch32:     T.setArch(Triple::loongarch64);    break;
   case Triple::mips:
     T.setArch(Triple::mips64, getSubArch());
     break;
   case Triple::mipsel:
     T.setArch(Triple::mips64el, getSubArch());
     break;
   case Triple::nvptx:           T.setArch(Triple::nvptx64);    break;
   case Triple::ppc:             T.setArch(Triple::ppc64);      break;
Triple Triple::getBigEndianArchVariant() const {
   case Triple::amdil:
   case Triple::avr:
   case Triple::hexagon:
   case Triple::hsail64:
   case Triple::hsail:
   case Triple::kalimba:
   case Triple::le32:
   case Triple::le64:
+  case Triple::loongarch32:
+  case Triple::loongarch64:
   case Triple::msp430:
   case Triple::nvptx64:
   case Triple::nvptx:
   case Triple::r600:
   case Triple::renderscript32:
   case Triple::renderscript64:
   case Triple::riscv32:
   case Triple::riscv64:
bool Triple::isLittleEndian() const {
   case Triple::bpfel:
   case Triple::csky:
   case Triple::hexagon:
   case Triple::hsail64:
   case Triple::hsail:
   case Triple::kalimba:
   case Triple::le32:
   case Triple::le64:
+  case Triple::loongarch32:
+  case Triple::loongarch64:
   case Triple::mips64el:
   case Triple::mipsel:
   case Triple::msp430:
   case Triple::nvptx64:
   case Triple::nvptx:
   case Triple::ppcle:
   case Triple::ppc64le:
   case Triple::r600:

llvm/unittests/ADT/TripleTest.cpp

TEST(TripleTest, ParsedIDs) {
   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
 
   T = Triple("csky-unknown-linux");
   EXPECT_EQ(Triple::csky, T.getArch());
   EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
   EXPECT_EQ(Triple::Linux, T.getOS());
   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
 
+  T = Triple("loongarch32-unknown-unknown");
+  EXPECT_EQ(Triple::loongarch32, T.getArch());
+  EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
+  EXPECT_EQ(Triple::UnknownOS, T.getOS());
+  EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
+
+  T = Triple("loongarch64-unknown-linux");
+  EXPECT_EQ(Triple::loongarch64, T.getArch());
+  EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
+  EXPECT_EQ(Triple::Linux, T.getOS());
+  EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
+
   T = Triple("riscv32-unknown-unknown");
   EXPECT_EQ(Triple::riscv32, T.getArch());
   EXPECT_EQ(Triple::UnknownVendor, T.getVendor());
   EXPECT_EQ(Triple::UnknownOS, T.getOS());
   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
 
   T = Triple("riscv64-unknown-linux");
   EXPECT_EQ(Triple::riscv64, T.getArch());
TEST(TripleTest, BitWidthPredicates) {
   EXPECT_TRUE(T.isArch64Bit());
   EXPECT_TRUE(T.isRISCV());
 
   T.setArch(Triple::csky);
   EXPECT_FALSE(T.isArch16Bit());
   EXPECT_TRUE(T.isArch32Bit());
   EXPECT_FALSE(T.isArch64Bit());
   EXPECT_TRUE(T.isCSKY());
+
+  T.setArch(Triple::loongarch32);
+  EXPECT_FALSE(T.isArch16Bit());
+  EXPECT_TRUE(T.isArch32Bit());
+  EXPECT_FALSE(T.isArch64Bit());
+  EXPECT_TRUE(T.isLoongArch());
+
+  T.setArch(Triple::loongarch64);
+  EXPECT_FALSE(T.isArch16Bit());
+  EXPECT_FALSE(T.isArch32Bit());
+  EXPECT_TRUE(T.isArch64Bit());
+  EXPECT_TRUE(T.isLoongArch());
 }
 
 TEST(TripleTest, BitWidthArchVariants) {
   Triple T;
   EXPECT_EQ(Triple::UnknownArch, T.get32BitArchVariant().getArch());
   EXPECT_EQ(Triple::UnknownArch, T.get64BitArchVariant().getArch());
 
   T.setArch(Triple::UnknownArch);
TEST(TripleTest, BitWidthArchVariants) {
   T.setArch(Triple::riscv64);
   EXPECT_EQ(Triple::riscv32, T.get32BitArchVariant().getArch());
   EXPECT_EQ(Triple::riscv64, T.get64BitArchVariant().getArch());
 
   T.setArch(Triple::csky);
   EXPECT_EQ(Triple::csky, T.get32BitArchVariant().getArch());
   EXPECT_EQ(Triple::UnknownArch, T.get64BitArchVariant().getArch());
 
+  T.setArch(Triple::loongarch32);
+  EXPECT_EQ(Triple::loongarch32, T.get32BitArchVariant().getArch());
+  EXPECT_EQ(Triple::loongarch64, T.get64BitArchVariant().getArch());
+
+  T.setArch(Triple::loongarch64);
+  EXPECT_EQ(Triple::loongarch32, T.get32BitArchVariant().getArch());
+  EXPECT_EQ(Triple::loongarch64, T.get64BitArchVariant().getArch());
+
   T.setArch(Triple::thumbeb);
   EXPECT_EQ(Triple::thumbeb, T.get32BitArchVariant().getArch());
   EXPECT_EQ(Triple::aarch64_be, T.get64BitArchVariant().getArch());
 
   T.setArch(Triple::thumb);
   EXPECT_EQ(Triple::thumb, T.get32BitArchVariant().getArch());
   EXPECT_EQ(Triple::aarch64, T.get64BitArchVariant().getArch());
 
TEST(TripleTest, EndianArchVariants) {
 
   T.setArch(Triple::tce);
   EXPECT_EQ(Triple::tce, T.getBigEndianArchVariant().getArch());
   EXPECT_EQ(Triple::tcele, T.getLittleEndianArchVariant().getArch());
 
   T.setArch(Triple::csky);
   EXPECT_EQ(Triple::UnknownArch, T.getBigEndianArchVariant().getArch());
   EXPECT_EQ(Triple::csky, T.getLittleEndianArchVariant().getArch());
+
+  T.setArch(Triple::loongarch32);
+  EXPECT_TRUE(T.isLittleEndian());
+  EXPECT_EQ(Triple::UnknownArch, T.getBigEndianArchVariant().getArch());
+  EXPECT_EQ(Triple::loongarch32, T.getLittleEndianArchVariant().getArch());
+
+  T.setArch(Triple::loongarch64);
+  EXPECT_TRUE(T.isLittleEndian());
+  EXPECT_EQ(Triple::UnknownArch, T.getBigEndianArchVariant().getArch());
+  EXPECT_EQ(Triple::loongarch64, T.getLittleEndianArchVariant().getArch());
 }
 
 TEST(TripleTest, getOSVersion) {
   Triple T;
   VersionTuple Version;
 
   T = Triple("i386-apple-darwin9");
   EXPECT_TRUE(T.isMacOSX());
TEST(TripleTest, FileFormat) {
   EXPECT_EQ(Triple::XCOFF, Triple("powerpc-ibm-aix").getObjectFormat());
   EXPECT_EQ(Triple::XCOFF, Triple("powerpc64-ibm-aix").getObjectFormat());
   EXPECT_EQ(Triple::XCOFF, Triple("powerpc---xcoff").getObjectFormat());
   EXPECT_EQ(Triple::XCOFF, Triple("powerpc64---xcoff").getObjectFormat());
 
   EXPECT_EQ(Triple::ELF, Triple("csky-unknown-unknown").getObjectFormat());
   EXPECT_EQ(Triple::ELF, Triple("csky-unknown-linux").getObjectFormat());
 
+  EXPECT_EQ(Triple::ELF, Triple("loongarch32-unknown-unknown").getObjectFormat());
+  EXPECT_EQ(Triple::ELF, Triple("loongarch64-unknown-linux").getObjectFormat());
+
   Triple MSVCNormalized(Triple::normalize("i686-pc-windows-msvc-elf"));
   EXPECT_EQ(Triple::ELF, MSVCNormalized.getObjectFormat());
 
   Triple GNUWindowsNormalized(Triple::normalize("i686-pc-windows-gnu-elf"));
   EXPECT_EQ(Triple::ELF, GNUWindowsNormalized.getObjectFormat());
 
   Triple CygnusNormalised(Triple::normalize("i686-pc-windows-cygnus-elf"));
   EXPECT_EQ(Triple::ELF, CygnusNormalised.getObjectFormat());