Add Hurd target to LLVMSupport (1/2)

Add the required target triples to LLVMSupport to support Hurd
in LLVM (formally `pc-hurd-gnu`).

Patch by sthibaul (Samuel Thibault)

Differential Revision: https://reviews.llvm.org/D54378

llvm-svn: 347832

llvm/include/llvm/ADT/Triple.h

@@ -186,7 +186,8 @@ class Triple {
     Contiki,
     AMDPAL,     // AMD PAL Runtime
     HermitCore, // HermitCore Unikernel/Multikernel
-    LastOSType = HermitCore
+    Hurd,       // GNU/Hurd
+    LastOSType = Hurd
   };
   enum EnvironmentType {
     UnknownEnvironment,
@@ -582,9 +583,15 @@ class Triple {
     return getOS() == Triple::KFreeBSD;
   }
 
+  /// Tests whether the OS is Hurd.
+  bool isOSHurd() const {
+    return getOS() == Triple::Hurd;
+  }
+
   /// Tests whether the OS uses glibc.
   bool isOSGlibc() const {
-    return (getOS() == Triple::Linux || getOS() == Triple::KFreeBSD) &&
+    return (getOS() == Triple::Linux || getOS() == Triple::KFreeBSD ||
+            getOS() == Triple::Hurd) &&
            !isAndroid();
   }
 

llvm/lib/Support/Triple.cpp

@@ -210,6 +210,7 @@ StringRef Triple::getOSTypeName(OSType Kind) {
   case Contiki: return "contiki";
   case AMDPAL: return "amdpal";
   case HermitCore: return "hermit";
+  case Hurd: return "hurd";
   }
 
   llvm_unreachable("Invalid OSType");
@@ -508,6 +509,7 @@ static Triple::OSType parseOS(StringRef OSName) {
     .StartsWith("contiki", Triple::Contiki)
     .StartsWith("amdpal", Triple::AMDPAL)
     .StartsWith("hermit", Triple::HermitCore)
+    .StartsWith("hurd", Triple::Hurd)
     .Default(Triple::UnknownOS);
 }
 

llvm/unittests/ADT/TripleTest.cpp

@@ -93,6 +93,12 @@ TEST(TripleTest, ParsedIDs) {
   EXPECT_EQ(Triple::Contiki, T.getOS());
   EXPECT_EQ(Triple::UnknownEnvironment, T.getEnvironment());
 
+  T = Triple("i386-pc-hurd-gnu");
+  EXPECT_EQ(Triple::x86, T.getArch());
+  EXPECT_EQ(Triple::PC, T.getVendor());
+  EXPECT_EQ(Triple::Hurd, T.getOS());
+  EXPECT_EQ(Triple::GNU, T.getEnvironment());
+
   T = Triple("x86_64-pc-linux-gnu");
   EXPECT_EQ(Triple::x86_64, T.getArch());
   EXPECT_EQ(Triple::PC, T.getVendor());