Try removing an MSVC2010 workaround.

Things seem to build fine locally without this, so let's
see what the bots think.

llvm-svn: 285087

llvm/utils/TableGen/IntrinsicEmitter.cpp

@@ -250,10 +250,6 @@ static void EncodeFixedValueType(MVT::SimpleValueType VT,
   }
 }
 
-#if defined(_MSC_VER) && !defined(__clang__)
-#pragma optimize("",off) // MSVC 2010 optimizer can't deal with this function.
-#endif
-
 static void EncodeFixedType(Record *R, std::vector<unsigned char> &ArgCodes,
                             std::vector<unsigned char> &Sig) {
 
@@ -341,10 +337,6 @@ static void EncodeFixedType(Record *R, std::vector<unsigned char> &ArgCodes,
   EncodeFixedValueType(VT, Sig);
 }
 
-#if defined(_MSC_VER) && !defined(__clang__)
-#pragma optimize("",on)
-#endif
-
 /// ComputeFixedEncoding - If we can encode the type signature for this
 /// intrinsic into 32 bits, return it.  If not, return ~0U.
 static void ComputeFixedEncoding(const CodeGenIntrinsic &Int,