Handle CXXDefaultArgExprs in EmitLValue. Fixes PR5484.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@88735 91177308-0d34-0410-b5e6-96231b3b80d8

2 files changed, 17 insertions, 2 deletions

diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index 63041fee82..c297903a69 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -267,6 +267,10 @@ LValue CodeGenFunction::EmitLValue(const Expr *E) {
     return EmitCXXBindTemporaryLValue(cast<CXXBindTemporaryExpr>(E));
   case Expr::CXXExprWithTemporariesClass:
     return EmitCXXExprWithTemporariesLValue(cast<CXXExprWithTemporaries>(E));
+  case Expr::CXXZeroInitValueExprClass:
+    return EmitNullInitializationLValue(cast<CXXZeroInitValueExpr>(E));
+  case Expr::CXXDefaultArgExprClass:
+    return EmitLValue(cast<CXXDefaultArgExpr>(E)->getExpr());
 
   case Expr::ObjCMessageExprClass:
     return EmitObjCMessageExprLValue(cast<ObjCMessageExpr>(E));
@@ -303,8 +307,6 @@ LValue CodeGenFunction::EmitLValue(const Expr *E) {
   case Expr::CXXReinterpretCastExprClass:
   case Expr::CXXConstCastExprClass:
     return EmitCastLValue(cast<CastExpr>(E));
-  case Expr::CXXZeroInitValueExprClass:
-    return EmitNullInitializationLValue(cast<CXXZeroInitValueExpr>(E));
   }
 }
 
diff --git a/test/CodeGenCXX/default-arguments.cpp b/test/CodeGenCXX/default-arguments.cpp
new file mode 100644
index 0000000000..5028ce99c7
--- /dev/null
+++ b/test/CodeGenCXX/default-arguments.cpp
@@ -0,0 +1,13 @@
+// RUN: clang-cc -emit-llvm %s -o - -triple=x86_64-apple-darwin10
+
+// PR5484
+namespace PR5484 {
+struct A { };
+extern A a;
+
+void f(const A & = a);
+
+void g() {
+  f();
+}
+}