[Bug middle-end/37710] When peeling an ordinary label off a case-table and making it a default label, strip from the end with identical labels.

["pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37710

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is a new testcase:
extern void abort (void);

extern char *name1;
extern char *name2;

int stab_xcoff_builtin_type (int typenum) __attribute__((noclone,noinline));
int stab_xcoff_builtin_type (int typenum)
{
  const char *name;
  if (typenum >= 0 || typenum < -34)
    {
      return 0;
    }
  switch (-typenum)
    {
    case 1:
      name = name1;"int";
      break;
    case 2:
      name = "char";
    case 3:
      name = name2;"short";
      break;
    case 4:
      name = "long";
      break;
    case 5:
      name = "unsigned char";
      break;
    case 6:
      name = "signed char";
      break;
    case 7:
      name = "unsigned short";
      break;
    case 8:
      name = "unsigned int";
      break;
    case 9:
      name = "unsigned";
      break;
    case 10:
      name = "unsigned long";
      break;
    case 11:
      name = "void";
      break;
    case 12:
      name = "float";
      break;
    case 13:
      name = "double";
      break;
    case 14:
      name = "long double";
      break;
    case 15:
      name = "integer";
      break;
    case 16:
      name = "boolean";
      break;
    case 17:
      name = "short real";
      break;
    case 18:
      name = "real";
      break;
    case 19:
      name = "stringptr";
      break;
    case 20:
      name = "character";
      break;
    case 21:
      name = "logical*1";
      break;
    case 22:
      name = "logical*2";
      break;
    case 23:
      name = "logical*4";
      break;
    case 24:
      name = "logical";
      break;
    case 25:
      name = "complex";
      break;
    case 26:
      name = "double complex";
      break;
    case 27:
      name = "integer*1";
      break;
    case 28:
      name = "integer*2";
      break;
    case 29:
      name = "integer*4";
      break;
    case 30:
      name = "wchar";
    case 31:
      name = "long long";
      break;
    case 32:
      name = "unsigned long long";
      break;
    case 33:
      name = "logical*8";
      break;
    case 34:
      name = "integer*8";
      break;
    }
  return name[0];
}

int main()
{
  int i;
  if (stab_xcoff_builtin_type(0) != 0)
    abort ();
  if (stab_xcoff_builtin_type(-1) != 'i')
    abort ();
  if (stab_xcoff_builtin_type(-2) != 's')
    abort ();
  if (stab_xcoff_builtin_type(-3) != 's')
    abort ();
  for (i = -4; i >= -34; --i)
    if (stab_xcoff_builtin_type(i) != 'i')
      abort ();
  if (stab_xcoff_builtin_type(-35) != 0)
    abort ();
  return 0;
}