strlen() and constant folding

[Bryan Christ]

Interesting.  Is this documented somewhere?  Is it reliable
cross-platform?  What if...

int poo(void)
{
   const char *test="test";
   const char *foo;

   foo=test;

   return strlen(foo);
}

On Tue, Jun 30, 2009 at 4:25 AM, Andrew Haley<aph@redhat.com> wrote:
> Bryan Christ wrote:
>> Is there some way to tell gcc to behave in a way that would be
>> analogous to constant folding when dealing with strlen() calls where
>> the target is const char* type?  If there is a macro or different
>> directive that would accomplish the same, that would be okay for my
>> purposes.
>
> Works for me:
>
> int poo(void)
> {
>  return strlen("test");
> }
>
> poo:
>        movl    $4, %eax
>        ret
>
> Andrew.
>



-- 
Bryan
<><