zend_mm_small_size_to_bit

Hi Matt,

You are right about zend_mm_small_size_to_bit(). It's result must be
undefined for 0 and corresponding part of non-GCC version may be removed as
well. I'll do it.

Thanks. Dmitry.

Hi Dmitry, all,

I was looking through a few parts of the new MM last week (cool, thanks! I
will try soon on my Windows XP), and wasn't sure about the function in the
subject...

This:

/* higher set bit number (0->0, 1->1, 2->2, 4->3, 8->4, 127->7, 128->8
etc) */
static zend_always_inline int zend_mm_small_size_to_bit(int size)
{
#if defined(GNUC)
return (__builtin_clz(size) ^ 0x1f) + 1;

Will never return 0, right? (Against the comment...) That's OK I guess
since, for now, it's only called with size >= 8.

But in that case, this can be removed from the non-GCC version:

if (size == 0) return 0;

Shouldn't have just one version able to return 0? :-/ Unless I'm missing
something! Let me know...

Thanks,
Matt