gcc/testsuite/gcc.dg/Wshadow-compatible-local-1.c

/* { dg-do compile } */
/* { dg-options "-Wshadow-compatible-local" } */

struct Bar
{
};

struct Bar bar;			/* { dg-bogus "shadowed declaration" } */

int val;			/* { dg-bogus "shadowed declaration" } */

int
func1 (int x)
{				/* { dg-bogus "shadowed declaration" } */
  int val;			/* { dg-bogus "shadows a global" } */
  val = x;
  return val;
}

int
func2 (int i)
{
  int a = 3;			/* { dg-warning "shadowed declaration" } */
  int j;			/* { dg-warning "shadowed declaration" } */

  for (j = 0; j < i; ++j)
    {
      int a = j;		/* { dg-warning "shadows a previous local" } */
      int j = a + 1;		/* { dg-warning "shadows a previous local" } */
      func1 (j);
    }

  return a;
}

void
func4 ()
{
  struct Bar bar;		/* { dg-bogus "shadowed declaration" } */
  if (val)
    {
      int bar;			/* { dg-bogus "shadows a previous local" } */
      func1 (bar);
    }
}