Add MachO RISC-V CPU type and CPU subtype to llvm & lldb (#136785)

Add the enum values for MachO RISC-V CPU type and CPU subtype to
llvm and use in LLDB's ArchSpec.

Author: JDevlieghere

lldb/source/Utility/ArchSpec.cpp

@@ -353,6 +353,8 @@ static const ArchDefinitionEntry g_macho_arch_entries[] = {
     {ArchSpec::eCore_x86_64_x86_64,   llvm::MachO::CPU_TYPE_X86_64,     llvm::MachO::CPU_SUBTYPE_X86_ARCH1,     UINT32_MAX, SUBTYPE_MASK},
     {ArchSpec::eCore_x86_64_x86_64h,  llvm::MachO::CPU_TYPE_X86_64,     llvm::MachO::CPU_SUBTYPE_X86_64_H,      UINT32_MAX, SUBTYPE_MASK},
     {ArchSpec::eCore_x86_64_x86_64,   llvm::MachO::CPU_TYPE_X86_64,     CPU_ANY, UINT32_MAX, UINT32_MAX},
+    {ArchSpec::eCore_riscv32,         llvm::MachO::CPU_TYPE_RISCV,      llvm::MachO::CPU_SUBTYPE_RISCV_ALL,     UINT32_MAX, SUBTYPE_MASK},
+    {ArchSpec::eCore_riscv32,         llvm::MachO::CPU_TYPE_RISCV,      CPU_ANY,                                UINT32_MAX, SUBTYPE_MASK},
     // Catch any unknown mach architectures so we can always use the object and symbol mach-o files
     {ArchSpec::eCore_uknownMach32,    0,                                0,                                      0xFF000000u, 0x00000000u},
     {ArchSpec::eCore_uknownMach64,    llvm::MachO::CPU_ARCH_ABI64,      0,                                      0xFF000000u, 0x00000000u}};

lldb/unittests/Utility/ArchSpecTest.cpp

@@ -113,6 +113,14 @@ TEST(ArchSpecTest, TestSetTriple) {
                   .consume_front("powerpc-apple-darwin"));
   EXPECT_EQ(ArchSpec::eCore_ppc_ppc970, AS.GetCore());
 
+  AS = ArchSpec();
+  EXPECT_TRUE(AS.SetTriple("24-0-apple-unknown"));
+  EXPECT_EQ(uint32_t(llvm::MachO::CPU_TYPE_RISCV), AS.GetMachOCPUType());
+  EXPECT_EQ(0u, AS.GetMachOCPUSubType());
+  EXPECT_TRUE(llvm::StringRef(AS.GetTriple().str())
+                  .consume_front("riscv32-apple-unknown"));
+  EXPECT_EQ(ArchSpec::eCore_riscv32, AS.GetCore());
+
   AS = ArchSpec();
   EXPECT_TRUE(AS.SetTriple("i686-pc-windows"));
   EXPECT_EQ(llvm::Triple::x86, AS.GetTriple().getArch());

llvm/include/llvm/BinaryFormat/MachO.h

@@ -1571,7 +1571,9 @@ enum CPUType {
   CPU_TYPE_ARM64_32 = CPU_TYPE_ARM | CPU_ARCH_ABI64_32,
   CPU_TYPE_SPARC = 14,
   CPU_TYPE_POWERPC = 18,
-  CPU_TYPE_POWERPC64 = CPU_TYPE_POWERPC | CPU_ARCH_ABI64
+  CPU_TYPE_POWERPC64 = CPU_TYPE_POWERPC | CPU_ARCH_ABI64,
+
+  CPU_TYPE_RISCV = 24,
 };
 
 enum : uint32_t {
@@ -1698,6 +1700,10 @@ enum CPUSubTypePowerPC {
   CPU_SUBTYPE_MC98601 = CPU_SUBTYPE_POWERPC_601
 };
 
+enum CPUSubTypeRISCV {
+  CPU_SUBTYPE_RISCV_ALL = 0,
+};
+
 Expected<uint32_t> getCPUType(const Triple &T);
 Expected<uint32_t> getCPUSubType(const Triple &T);
 Expected<uint32_t> getCPUSubType(const Triple &T, unsigned PtrAuthABIVersion,