Add IRGen support for return statements in functions with reference 
type.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@72459 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGStmt.cpp b/lib/CodeGen/CGStmt.cpp
index b13b9e5..b67996c 100644
--- a/lib/CodeGen/CGStmt.cpp
+++ b/lib/CodeGen/CGStmt.cpp
@@ -498,6 +498,10 @@
       EmitAnyExpr(RV);
   } else if (RV == 0) {
     // Do nothing (return value is left uninitialized)
+  } else if (FnRetTy->isReferenceType()) {
+    // If this function returns a reference, take the address of the expression
+    // rather than the value.
+    Builder.CreateStore(EmitLValue(RV).getAddress(), ReturnValue);
   } else if (!hasAggregateLLVMType(RV->getType())) {
     Builder.CreateStore(EmitScalarExpr(RV), ReturnValue);
   } else if (RV->getType()->isAnyComplexType()) {