diff --git a/llvm/include/llvm/ADT/Triple.h b/llvm/include/llvm/ADT/Triple.h
--- a/llvm/include/llvm/ADT/Triple.h
+++ b/llvm/include/llvm/ADT/Triple.h
@@ -159,6 +159,7 @@
     Mesa,
     SUSE,
     OpenEmbedded,
+    RedHat,
     LastVendorType = OpenEmbedded
   };
   enum OSType {
@@ -531,7 +532,8 @@
     EnvironmentType Env = getEnvironment();
     return Env == Triple::GNU || Env == Triple::GNUABIN32 ||
            Env == Triple::GNUABI64 || Env == Triple::GNUEABI ||
-           Env == Triple::GNUEABIHF || Env == Triple::GNUX32;
+           Env == Triple::GNUEABIHF || Env == Triple::GNUX32 ||
+           (getVendor() == Triple::RedHat && Env == Triple::UnknownEnvironment);
   }
 
   bool isOSContiki() const {
diff --git a/llvm/lib/Support/Triple.cpp b/llvm/lib/Support/Triple.cpp
--- a/llvm/lib/Support/Triple.cpp
+++ b/llvm/lib/Support/Triple.cpp
@@ -179,6 +179,7 @@
   case PC: return "pc";
   case SCEI: return "scei";
   case SUSE: return "suse";
+  case RedHat: return "redhat";
   }
 
   llvm_unreachable("Invalid VendorType!");
@@ -497,6 +498,7 @@
     .Case("mesa", Triple::Mesa)
     .Case("suse", Triple::SUSE)
     .Case("oe", Triple::OpenEmbedded)
+    .Case("redhat", Triple::RedHat)
     .Default(Triple::UnknownVendor);
 }
 
diff --git a/llvm/unittests/ADT/TripleTest.cpp b/llvm/unittests/ADT/TripleTest.cpp
--- a/llvm/unittests/ADT/TripleTest.cpp
+++ b/llvm/unittests/ADT/TripleTest.cpp
@@ -128,6 +128,12 @@
   EXPECT_EQ(Triple::SCEI, T.getVendor());
   EXPECT_EQ(Triple::PS4, T.getOS());
 
+  T = Triple("x86_64-redhat-linux");
+  EXPECT_EQ(Triple::x86_64, T.getArch());
+  EXPECT_EQ(Triple::RedHat, T.getVendor());
+  EXPECT_EQ(Triple::Linux, T.getOS());
+  EXPECT_EQ(true, T.isGNUEnvironment());
+
   T = Triple("powerpc-ibm-aix");
   EXPECT_EQ(Triple::ppc, T.getArch());
   EXPECT_EQ(Triple::IBM, T.getVendor());