[llvm] [llvm-readobj] Print AMDGPU specific values in GNU mode (PR #75661)

[Matt Arsenault via llvm-commits]

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@@ -3630,6 +3641,28 @@ 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_AMDGPU) {
+    switch (e.e_ident[ELF::EI_ABIVERSION]) {
+    default:
+      break;
+    case 0:
+      // ELFOSABI_AMDGPU_PAL, ELFOSABI_AMDGPU_MESA3D support *_V3 flags.
+      [[fallthrough]];
+    case ELF::ELFABIVERSION_AMDGPU_HSA_V3:
+      ElfFlags =
+          printFlags(e.e_flags, ArrayRef(ElfHeaderAMDGPUFlagsABIVersion3),
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arsenm wrote:

I'm surprised you need the ArrayRef 

https://github.com/llvm/llvm-project/pull/75661