--- /dev/null
+/* The purpose of this code is to test argument passing of a tuple of
+ 11 integers, with the break point between named and unnamed arguments
+ at every possible position. */
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+static int errors = 0;
+
+static void
+verify (const char *tcase, int n[11])
+{
+ int i;
+ for (i = 0; i <= 10; i++)
+ if (n[i] != i)
+ {
+ printf (" %s: n[%d] = %d expected %d\n", tcase, i, n[i], i);
+ errors++;
+ }
+}
+
+#define STR(x) #x
+
+#define p(i) int q##i,
+#define P(i) n[i] = q##i;
+
+#define p0 p(0)
+#define p1 p(1)
+#define p2 p(2)
+#define p3 p(3)
+#define p4 p(4)
+#define p5 p(5)
+#define p6 p(6)
+#define p7 p(7)
+#define p8 p(8)
+#define p9 p(9)
+
+#define P0 P(0)
+#define P1 P(1)
+#define P2 P(2)
+#define P3 P(3)
+#define P4 P(4)
+#define P5 P(5)
+#define P6 P(6)
+#define P7 P(7)
+#define P8 P(8)
+#define P9 P(9)
+
+#define TCASE(x, params, vecinit) \
+static void \
+varargs##x (params ...) \
+{ \
+ va_list ap; \
+ int n[11]; \
+ int i; \
+ \
+ va_start (ap, q##x); \
+ vecinit \
+ for (i = x + 1; i <= 10; i++) \
+ n[i] = va_arg (ap, int); \
+ va_end (ap); \
+ \
+ verify (STR(varargs##x), n); \
+}
+
+#define TEST(x) varargs##x (0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10)
+
+TCASE(0, p0 , P0 )
+TCASE(1, p0 p1 , P0 P1 )
+TCASE(2, p0 p1 p2 , P0 P1 P2 )
+TCASE(3, p0 p1 p2 p3 , P0 P1 P2 P3 )
+TCASE(4, p0 p1 p2 p3 p4 , P0 P1 P2 P3 P4 )
+TCASE(5, p0 p1 p2 p3 p4 p5 , P0 P1 P2 P3 P4 P5 )
+TCASE(6, p0 p1 p2 p3 p4 p5 p6 , P0 P1 P2 P3 P4 P5 P6 )
+TCASE(7, p0 p1 p2 p3 p4 p5 p6 p7 , P0 P1 P2 P3 P4 P5 P6 P7 )
+TCASE(8, p0 p1 p2 p3 p4 p5 p6 p7 p8 , P0 P1 P2 P3 P4 P5 P6 P7 P8 )
+TCASE(9, p0 p1 p2 p3 p4 p5 p6 p7 p8 p9, P0 P1 P2 P3 P4 P5 P6 P7 P8 P9)
+
+int main(void)
+{
+ TEST(0);
+ TEST(1);
+ TEST(2);
+ TEST(3);
+ TEST(4);
+ TEST(5);
+ TEST(6);
+ TEST(7);
+ TEST(8);
+ TEST(9);
+
+ if (errors)
+ abort ();
+ exit (0);
+}