Add amdopencl environment to triple

[arsenm]

Summary

This is used by the AMD x86 OpenCL implementation
to change some ABI details on Windows and Linux.

[echristo]

Fascinating. Anyhow, sorry for the delay, this looks OK to me.

-eric

[arsenm]

r243627

include/llvm/ADT/Triple.h

enum EnvironmentType {
     CODE16,
     EABI,
     EABIHF,
     Android,
 
     MSVC,
     Itanium,
     Cygnus,
+    AMDOpenCL
   };
   enum ObjectFormatType {
     UnknownObjectFormat,
 
     COFF,
     ELF,
     MachO,
   };

lib/Support/Triple.cpp

const char *Triple::getEnvironmentTypeName(EnvironmentType Kind) {
   case GNUX32: return "gnux32";
   case CODE16: return "code16";
   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";
   }
 
   llvm_unreachable("Invalid EnvironmentType!");
 }
 
 Triple::ArchType Triple::getArchTypeForLLVMName(StringRef Name) {
   return StringSwitch<Triple::ArchType>(Name)
     .Case("aarch64", aarch64)
return StringSwitch<Triple::EnvironmentType>(EnvironmentName)
     .StartsWith("gnueabi", Triple::GNUEABI)
     .StartsWith("gnux32", Triple::GNUX32)
     .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)
     .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)

unittests/ADT/TripleTest.cpp

TEST(TripleTest, MutateName) {
   EXPECT_EQ("i386-pc-freebsd-gnu", T.getTriple());
 
   T.setOSAndEnvironmentName("darwin");
   EXPECT_EQ(Triple::x86, T.getArch());
   EXPECT_EQ(Triple::PC, T.getVendor());
   EXPECT_EQ(Triple::Darwin, T.getOS());
   EXPECT_EQ("i386-pc-darwin", T.getTriple());
 
+  T.setEnvironmentName("amdopencl");
+  EXPECT_EQ(Triple::AMDOpenCL, T.getEnvironment());
 }
 
 TEST(TripleTest, BitWidthPredicates) {
   Triple T;
   EXPECT_FALSE(T.isArch16Bit());
   EXPECT_FALSE(T.isArch32Bit());
   EXPECT_FALSE(T.isArch64Bit());