blocks: Support capturing complex variable in block.
// rdar://10033896


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139041 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExprComplex.cpp b/lib/CodeGen/CGExprComplex.cpp
index 1a27d13..c7b9a30 100644
--- a/lib/CodeGen/CGExprComplex.cpp
+++ b/lib/CodeGen/CGExprComplex.cpp
@@ -119,6 +119,7 @@
 
   // l-values.
   ComplexPairTy VisitDeclRefExpr(const Expr *E) { return EmitLoadOfLValue(E); }
+  ComplexPairTy VisitBlockDeclRefExpr(const Expr *E) { return EmitLoadOfLValue(E); }
   ComplexPairTy VisitObjCIvarRefExpr(ObjCIvarRefExpr *E) {
     return EmitLoadOfLValue(E);
   }