1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/abi/mangle39.C b/gcc/testsuite/g++.dg/abi/mangle39.C
new file mode 100644
index 000000000..289635610
--- /dev/null
+++ b/gcc/testsuite/g++.dg/abi/mangle39.C
@@ -0,0 +1,28 @@
+// PR c++/42338
+// { dg-options "-std=c++0x -fabi-version=5" }
+// { dg-final { scan-assembler "_Z1fIPiEDTcmppfp_Li0EET_" } }
+// { dg-final { scan-assembler "_Z1gIiEvRK1AIT_EDTixfL0p_Li0EE" } }
+
+template<typename T>
+auto f(T t) -> decltype(++t, 0)
+{
+  ++t;
+  return 0;
+}
+
+template <class T>
+struct A
+{
+  T operator[](int) const { return 0; }
+};
+
+template< typename T >
+void g(const A<T> &a, decltype(a[0]) t) { }
+
+int main()
+{
+  f((int*)0);
+
+  A<int> a;
+  g(a,1);
+}