Eliminate a 'control reaches end of non-void function' warning.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64111 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/TableGen/CodeGenDAGPatterns.h b/utils/TableGen/CodeGenDAGPatterns.h
index 0bd3165..a3e0af6 100644
--- a/utils/TableGen/CodeGenDAGPatterns.h
+++ b/utils/TableGen/CodeGenDAGPatterns.h
@@ -528,6 +528,7 @@
     if (IID-Intrinsics.size()-1 < TgtIntrinsics.size())
       return TgtIntrinsics[IID-Intrinsics.size()-1];
     assert(0 && "Bad intrinsic ID!");
+    abort();
   }
   
   unsigned getIntrinsicID(Record *R) const {