Optimize int === int/double === double

Do this by reusing the implementation used for `==`
when both arguments are ints (IS_LONG) or both are floats (IS_DOUBLE)

```php
// Before: nestedloop_ni took 0.442 seconds
// After: nestedloop_ni takes 0.401 seconds (same as nestedloop_ne)
function nestedloop_ni(int $k) {
  $x = 0;
  for ($i=0; $i < 50000000; $i++) {
    if ($i === $k) {
      $x++;
    }
  }
  print "$x\n";
}
function nestedloop_ne(int $k) {
  $x = 0;
  for ($i=0; $i < 50000000; $i++) {
    if ($i == $k) {
        $x++;
    }
  }
  print "$x\n";
}
```

0 files changed, 0 insertions, 0 deletions