[ProfileData] Fix a warning

This patch fixes:

  llvm/lib/ProfileData/InstrProf.cpp:146:3: error: default label in
  switch which covers all enumeration values
  [-Werror,-Wcovered-switch-default]

diff --git a/llvm/lib/ProfileData/InstrProf.cpp b/llvm/lib/ProfileData/InstrProf.cpp
index de5ba33..6bd02ab 100644 (file)
--- a/llvm/lib/ProfileData/InstrProf.cpp
+++ b/llvm/lib/ProfileData/InstrProf.cpp
@@ -143,9 +143,6 @@ static std::string getInstrProfErrString(instrprof_error Err,
     OS << "profile uses zlib compression but the profile reader was built "
           "without zlib support";
     break;
-  default:
-    llvm_unreachable("A value of instrprof_error has no message.");
-    break;
   }
 
   // If optional error message is not empty, append it to the message.