Re-instate the pragma optimize hack for MSVC, but not clang-cl

Reverts commit r230686 with define modifications.

llvm-svn: 230692

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/utils/TableGen/IntrinsicEmitter.cpp b/llvm/utils/TableGen/IntrinsicEmitter.cpp
index 2fb78b0334c..e71c695c25d 100644
--- a/llvm/utils/TableGen/IntrinsicEmitter.cpp
+++ b/llvm/utils/TableGen/IntrinsicEmitter.cpp
@@ -292,6 +292,10 @@ 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) {
 
@@ -377,6 +381,10 @@ 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,