missed changes from PR feedback

Author: Bharadwaj Yadavalli

llvm/lib/CodeGen/CommandFlags.cpp

@@ -744,7 +744,7 @@ void codegen::setFunctionAttributes(StringRef CPU, StringRef Features,
 Expected<std::unique_ptr<TargetMachine>>
 codegen::createTargetMachineForTriple(StringRef TargetTriple,
                                       CodeGenOptLevel OptLevel) {
-  Triple TheTriple(TargetTriple.str());
+  Triple TheTriple(TargetTriple);
   std::string Error;
   const auto *TheTarget =
       TargetRegistry::lookupTarget(codegen::getMArch(), TheTriple, Error);

llvm/lib/TargetParser/Triple.cpp

@@ -137,8 +137,9 @@ StringRef Triple::getArchName(ArchType Kind, SubArchType SubArch) {
     case Triple::DXILSubArch_v1_8:
       return "dxilv1.8";
     default:
-      return "";
+      break;
     }
+    break;
   default:
     break;
   }