Triple: Add amdcov1/amdcov2 environments

[• tstellarAMD]

Summary

These are used to specify which version of the AMD code object format
the compiler should emit.

[arsenm]

I thought v1 support was being removed, so do we need to be able to distinguish it?

[• tstellarAMD]

We are dropping v1 support, so no need to add new triples.

include/llvm/ADT/Triple.h

enum EnvironmentType {
     EABIHF,
     Android,
 
     MSVC,
     Itanium,
     Cygnus,
     AMDOpenCL,
     CoreCLR,
-    LastEnvironmentType = CoreCLR
+    AMDCOV1,
+    AMDCOV2,
+    LastEnvironmentType = AMDCOV2
   };
   enum ObjectFormatType {
     UnknownObjectFormat,
 
     COFF,
     ELF,
     MachO,
   };

lib/Support/Triple.cpp

const char *Triple::getEnvironmentTypeName(EnvironmentType Kind) {
   case EABI: return "eabi";
   case EABIHF: return "eabihf";
   case Android: return "android";
   case MSVC: return "msvc";
   case Itanium: return "itanium";
   case Cygnus: return "cygnus";
   case AMDOpenCL: return "amdopencl";
   case CoreCLR: return "coreclr";
+  case AMDCOV1: return "amdcov1";
+  case AMDCOV2: return "amdcov2";
   }
 
   llvm_unreachable("Invalid EnvironmentType!");
 }
 
 static Triple::ArchType parseBPFArch(StringRef ArchName) {
   if (ArchName.equals("bpf")) {
     if (sys::IsLittleEndianHost)
return StringSwitch<Triple::EnvironmentType>(EnvironmentName)
     .StartsWith("code16", Triple::CODE16)
     .StartsWith("gnu", Triple::GNU)
     .StartsWith("android", Triple::Android)
     .StartsWith("msvc", Triple::MSVC)
     .StartsWith("itanium", Triple::Itanium)
     .StartsWith("cygnus", Triple::Cygnus)
     .StartsWith("amdopencl", Triple::AMDOpenCL)
     .StartsWith("coreclr", Triple::CoreCLR)
+    .StartsWith("amdcov1", Triple::AMDCOV1)
+    .StartsWith("amdcov2", Triple::AMDCOV2)
     .Default(Triple::UnknownEnvironment);
 }
 
 static Triple::ObjectFormatType parseFormat(StringRef EnvironmentName) {
   return StringSwitch<Triple::ObjectFormatType>(EnvironmentName)
     .EndsWith("coff", Triple::COFF)
     .EndsWith("elf", Triple::ELF)
     .EndsWith("macho", Triple::MachO)