Fix for PR5524: make reference binding in default argument work correctly.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91733 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index 6773d0b..64fbfbc 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -97,7 +97,10 @@
bool IsInitializer) {
bool ShouldDestroyTemporaries = false;
unsigned OldNumLiveTemporaries = 0;
-
+
+ if (const CXXDefaultArgExpr *DAE = dyn_cast<CXXDefaultArgExpr>(E))
+ E = DAE->getExpr();
+
if (const CXXExprWithTemporaries *TE = dyn_cast<CXXExprWithTemporaries>(E)) {
ShouldDestroyTemporaries = true;
diff --git a/test/CodeGenCXX/reference-bind-default-argument.cpp b/test/CodeGenCXX/reference-bind-default-argument.cpp
new file mode 100644
index 0000000..acce962
--- /dev/null
+++ b/test/CodeGenCXX/reference-bind-default-argument.cpp
@@ -0,0 +1,6 @@
+// RUN: %clang_cc1 %s -emit-llvm-only -verify
+
+struct A {};
+struct B : A {};
+void a(const A& x = B());
+void b() { a(); }