Correctly handle constants that refer to enums.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46481 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CodeGen/CGExprConstant.cpp b/CodeGen/CGExprConstant.cpp
index da2fef6..faf2096 100644
--- a/CodeGen/CGExprConstant.cpp
+++ b/CodeGen/CGExprConstant.cpp
@@ -186,6 +186,8 @@
     const ValueDecl *Decl = E->getDecl();
     if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(Decl))
       return CGM.GetAddrOfFunctionDecl(FD, false);
+    if (const EnumConstantDecl *EC = dyn_cast<EnumConstantDecl>(Decl))
+      return llvm::ConstantInt::get(EC->getInitVal());
     assert(0 && "Unsupported decl ref type!");
     return 0;
   }