[Bug tree-optimization/63747] [5 regression] icf mis-compares switch gimple

[joey.ye at arm dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63747

--- Comment #2 from Joey Ye <joey.ye at arm dot com> ---
/* { dg-options "-O2" } */
/* { dg-do run } */

static int __attribute__((noinline))
foo(int i)
{
  switch (i)
  {
    case 0:
    case 1:
    case 2:
    case 3:
      return 0;
    default:
      return 1;
  }
}

static int __attribute__((noinline))
bar(int i)
{
  switch (i)
  {
    case 4:
    case 5:
    case 6:
    case 7:
      return 0;
    default:
      return 1;
  }
}

int main()
{
  return foo(0) + bar(4);
}