gcc/testsuite/gcc.dg/pr23818.c

/* PR tree-optimization/23818 */
/* { dg-do run } */
/* { dg-options "-O2 -fno-tree-dominator-opts" } */

#include <stdarg.h>

extern void abort (void);

void
foo (int p[100], int k, ...)
{
  int j, *q;
  va_list ap;

  va_start (ap, k);
  q = va_arg (ap, int *);
  for (j = 0; j < 100; j++)
    q[j] = p[j] + 10;
  va_end(ap);
}

int
main (void)
{
  int buf[100], buf2[100], i;
  for (i = 0; i < 100; i++)
    buf[i] = i + 1;
  foo (buf, 0, buf2);
  for (i = 0; i < 100; i++)
    if (buf2[i] != buf[i] + 10)
      abort ();
  return 0;
}