[llvm-readobj] Print the associated CUDA SM flags (#75664)

Summary:
The architecture that the CUDA application was compiled for is stored in
the ELF flags. This patch just adds some simple enum values to indicate
this to the user in a readable way.

Author: jhuber6

llvm/tools/llvm-readobj/ELFDumper.cpp

@@ -1693,6 +1693,19 @@ const EnumEntry<unsigned> ElfHeaderAMDGPUFlagsABIVersion4[] = {
     LLVM_READOBJ_ENUM_ENT(ELF, EF_AMDGPU_FEATURE_SRAMECC_ON_V4),
 };
 
+const EnumEntry<unsigned> ElfHeaderNVPTXFlags[] = {
+    ENUM_ENT(EF_CUDA_SM20, "sm_20"), ENUM_ENT(EF_CUDA_SM21, "sm_21"),
+    ENUM_ENT(EF_CUDA_SM30, "sm_30"), ENUM_ENT(EF_CUDA_SM32, "sm_32"),
+    ENUM_ENT(EF_CUDA_SM35, "sm_35"), ENUM_ENT(EF_CUDA_SM37, "sm_37"),
+    ENUM_ENT(EF_CUDA_SM50, "sm_50"), ENUM_ENT(EF_CUDA_SM52, "sm_52"),
+    ENUM_ENT(EF_CUDA_SM53, "sm_53"), ENUM_ENT(EF_CUDA_SM60, "sm_60"),
+    ENUM_ENT(EF_CUDA_SM61, "sm_61"), ENUM_ENT(EF_CUDA_SM62, "sm_62"),
+    ENUM_ENT(EF_CUDA_SM70, "sm_70"), ENUM_ENT(EF_CUDA_SM72, "sm_72"),
+    ENUM_ENT(EF_CUDA_SM75, "sm_75"), ENUM_ENT(EF_CUDA_SM80, "sm_80"),
+    ENUM_ENT(EF_CUDA_SM86, "sm_86"), ENUM_ENT(EF_CUDA_SM87, "sm_87"),
+    ENUM_ENT(EF_CUDA_SM89, "sm_89"), ENUM_ENT(EF_CUDA_SM90, "sm_90"),
+};
+
 const EnumEntry<unsigned> ElfHeaderRISCVFlags[] = {
   ENUM_ENT(EF_RISCV_RVC, "RVC"),
   ENUM_ENT(EF_RISCV_FLOAT_ABI_SINGLE, "single-float ABI"),
@@ -3630,6 +3643,9 @@ template <class ELFT> void GNUELFDumper<ELFT>::printFileHeaders() {
   else if (e.e_machine == EM_XTENSA)
     ElfFlags = printFlags(e.e_flags, ArrayRef(ElfHeaderXtensaFlags),
                           unsigned(ELF::EF_XTENSA_MACH));
+  else if (e.e_machine == EM_CUDA)
+    ElfFlags = printFlags(e.e_flags, ArrayRef(ElfHeaderNVPTXFlags),
+                          unsigned(ELF::EF_CUDA_SM));
   Str = "0x" + utohexstr(e.e_flags);
   if (!ElfFlags.empty())
     Str = Str + ", " + ElfFlags;
@@ -6912,6 +6928,9 @@ template <class ELFT> void LLVMELFDumper<ELFT>::printFileHeaders() {
     else if (E.e_machine == EM_XTENSA)
       W.printFlags("Flags", E.e_flags, ArrayRef(ElfHeaderXtensaFlags),
                    unsigned(ELF::EF_XTENSA_MACH));
+    else if (E.e_machine == EM_CUDA)
+      W.printFlags("Flags", E.e_flags, ArrayRef(ElfHeaderNVPTXFlags),
+                   unsigned(ELF::EF_CUDA_SM));
     else
       W.printFlags("Flags", E.e_flags);
     W.printNumber("HeaderSize", E.e_ehsize);