Remainder of the __builtin_overload feedback


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46601 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/CodeGen/CGExprAgg.cpp b/CodeGen/CGExprAgg.cpp
index d52e8b1..377e90d 100644
--- a/CodeGen/CGExprAgg.cpp
+++ b/CodeGen/CGExprAgg.cpp
@@ -76,6 +76,7 @@
   void VisitStmtExpr(const StmtExpr *E);
   void VisitBinaryOperator(const BinaryOperator *BO);
   void VisitBinAssign(const BinaryOperator *E);
+  void VisitOverloadExpr(const OverloadExpr *E);
 
   
   void VisitConditionalOperator(const ConditionalOperator *CO);
@@ -160,6 +161,20 @@
   EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType());
 }
 
+void AggExprEmitter::VisitOverloadExpr(const OverloadExpr *E)
+{
+  RValue RV = CGF.EmitCallExpr(E->getFn(), E->arg_begin(),
+                               E->getNumArgs(CGF.getContext()));
+  assert(RV.isAggregate() && "Return value must be aggregate value!");
+  
+  // If the result is ignored, don't copy from the value.
+  if (DestPtr == 0)
+    // FIXME: If the source is volatile, we must read from it.
+    return;
+  
+  EmitAggregateCopy(DestPtr, RV.getAggregateAddr(), E->getType());
+}
+
 void AggExprEmitter::VisitStmtExpr(const StmtExpr *E) {
   CGF.EmitCompoundStmt(*E->getSubStmt(), true, DestPtr, VolatileDest);
 }