1 files changed, 55 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/template/stdarg1.C b/gcc/testsuite/g++.dg/template/stdarg1.C
new file mode 100644
index 000000000..94804eeed
--- /dev/null
+++ b/gcc/testsuite/g++.dg/template/stdarg1.C
@@ -0,0 +1,55 @@
+// PR c++/47022
+// { dg-do compile }
+// Suppress a warning that is irrelevant to the purpose of this test.
+// { dg-options "-Wno-abi" { target arm_eabi } }
+
+#include <cstdarg>
+
+template <typename T>
+void
+f1 (T *p, va_list ap)
+{
+  *p = va_arg (ap, long double);
+  *p += va_arg (ap, double);
+}
+
+template <typename T>
+void
+f2 (T *p, va_list ap)
+{
+  *p = __real__ va_arg (ap, _Complex int);
+  *p += __imag__ va_arg (ap, _Complex double);
+  *p += __imag__ va_arg (ap, _Complex long double);
+}
+
+template <typename T>
+void
+f3 (T *p, va_list ap)
+{
+  *p = va_arg (ap, T);
+}
+
+void
+foo (int x, va_list ap)
+{
+  if (x == 0)
+    {
+      long double ld;
+      f1 (&ld, ap);
+    }
+  else if (x == 1)
+    {
+      int i;
+      f2 (&i, ap);
+    }
+  else if (x == 2)
+    {
+      long double ld;
+      f3 (&ld, ap);
+    }
+  else if (x == 3)
+    {
+      _Complex double cd;
+      f3 (&cd, ap);
+    }
+}