gcc/testsuite/gcc.dg/pr46130-1.c

/* PR tree-optimization/46130 */
/* { dg-do compile } */
/* { dg-options "-O2 -fno-tree-dce" } */

#include <stdarg.h>

static void
foo (va_list ap)
{
  va_arg (ap, char *)[0];
}

void
bar (va_list ap)
{
  foo (ap);
}

void
baz (va_list ap)
{
  foo (ap);
}