[PATCH] memset 0 in obscure is optimized away by compiler

[Rich Felker]

On Wed, Apr 16, 2014 at 07:14:05PM +0200, Harald Becker wrote:
> Hi Tito !
> 
> >I've tried to find out if memset is really optimized away in
> >this case with some test code that I've compiled with :
> 
> What is wrong with optimization of code, e.g. replacing call to
> memset by a quick loop which does same thing even faster than a
> function call? ... beside that such optimization needs normally a
> bit more of space it is faster and does same thing as original
> function call. Try using size optimization (-Os) to avoid
> replacing function calls by inline replacements.

The quick loop will equally be optimized away, as neither it nor the
memset have any observable effect.

Rich