Autodetect bulldozers.

llvm-svn: 145607
diff --git a/llvm/lib/Support/Host.cpp b/llvm/lib/Support/Host.cpp
index a19e4b4..86d1c5d 100644
--- a/llvm/lib/Support/Host.cpp
+++ b/llvm/lib/Support/Host.cpp
@@ -298,6 +298,8 @@
         }
       case 16:
         return "amdfam10";
+      case 21:
+        return "bdver1";
     default:
       return "generic";
     }