Support/ELF: Add EM_AMDGPU

[• tstellarAMD]

Summary

This will be used by the R600 backend.

[• tstellarAMD]

Updated llvm-readobj so it can print EM_AMDGPU.

[• rafael]

LGTM

include/llvm/Support/ELF.h

enum {
   EM_KMX32         = 211, // KM211 KMX32 32-bit processor
   EM_KMX16         = 212, // KM211 KMX16 16-bit processor
   EM_KMX8          = 213, // KM211 KMX8 8-bit processor
   EM_KVARC         = 214, // KM211 KVARC processor
   EM_CDP           = 215, // Paneve CDP architecture family
   EM_COGE          = 216, // Cognitive Smart Memory Processor
   EM_COOL          = 217, // iCelero CoolEngine
   EM_NORC          = 218, // Nanoradio Optimized RISC
-  EM_CSR_KALIMBA   = 219  // CSR Kalimba architecture family
+  EM_CSR_KALIMBA   = 219, // CSR Kalimba architecture family
+  EM_AMDGPU        = 224  // AMD GPU architecture
 };
 
 // Object file classes.
 enum {
   ELFCLASSNONE = 0,
   ELFCLASS32 = 1, // 32-bit object file
   ELFCLASS64 = 2  // 64-bit object file
 };

tools/llvm-readobj/ELFDumper.cpp

static const EnumEntry<unsigned> ElfMachineType[] = {
   LLVM_READOBJ_ENUM_ENT(ELF, EM_CLOUDSHIELD  ),
   LLVM_READOBJ_ENUM_ENT(ELF, EM_COREA_1ST    ),
   LLVM_READOBJ_ENUM_ENT(ELF, EM_COREA_2ND    ),
   LLVM_READOBJ_ENUM_ENT(ELF, EM_ARC_COMPACT2 ),
   LLVM_READOBJ_ENUM_ENT(ELF, EM_OPEN8        ),
   LLVM_READOBJ_ENUM_ENT(ELF, EM_RL78         ),
   LLVM_READOBJ_ENUM_ENT(ELF, EM_VIDEOCORE5   ),
   LLVM_READOBJ_ENUM_ENT(ELF, EM_78KOR        ),
-  LLVM_READOBJ_ENUM_ENT(ELF, EM_56800EX      )
+  LLVM_READOBJ_ENUM_ENT(ELF, EM_56800EX      ),
+  LLVM_READOBJ_ENUM_ENT(ELF, EM_AMDGPU       )
 };
 
 static const EnumEntry<unsigned> ElfSymbolBindings[] = {
   { "Local",  ELF::STB_LOCAL        },
   { "Global", ELF::STB_GLOBAL       },
   { "Weak",   ELF::STB_WEAK         },
   { "Unique", ELF::STB_GNU_UNIQUE   }
 };