diff --git a/utils/TableGen/CodeGenTarget.cpp b/utils/TableGen/CodeGenTarget.cpp
index 0d29a2f3557..fbb993f4f44 100644
--- a/utils/TableGen/CodeGenTarget.cpp
+++ b/utils/TableGen/CodeGenTarget.cpp
@@ -488,18 +488,17 @@ CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
     }
     if (EVT(VT).isOverloaded()) {
       OverloadedVTs.push_back(VT);
-      isOverloaded |= true;
+      isOverloaded = true;
     }
+
+    // Reject invalid types.
+    if (VT == MVT::isVoid)
+      throw "Intrinsic '" + DefName + " has void in result type list!";
     
     IS.RetVTs.push_back(VT);
     IS.RetTypeDefs.push_back(TyEl);
   }
   
-  if (IS.RetVTs.size() == 1 && IS.RetVTs[0] == MVT::isVoid) {
-    IS.RetVTs.pop_back();
-    IS.RetTypeDefs.pop_back();
-  }
-
   // Parse the list of parameter types.
   TypeList = R->getValueAsListInit("ParamTypes");
   for (unsigned i = 0, e = TypeList->getSize(); i != e; ++i) {
@@ -520,10 +519,16 @@ CodeGenIntrinsic::CodeGenIntrinsic(Record *R) {
              "Expected iAny or vAny type");
     } else
       VT = getValueType(TyEl->getValueAsDef("VT"));
+    
     if (EVT(VT).isOverloaded()) {
       OverloadedVTs.push_back(VT);
-      isOverloaded |= true;
+      isOverloaded = true;
     }
+    
+    // Reject invalid types.
+    if (VT == MVT::isVoid && i != e-1 /*void at end means varargs*/)
+      throw "Intrinsic '" + DefName + " has void in result type list!";
+    
     IS.ParamVTs.push_back(VT);
     IS.ParamTypeDefs.push_back(TyEl);
   }