[PATCH][AArch64] Add rawmemchr

[Szabolcs Nagy]

On 02/06/16 14:48, Wilco Dijkstra wrote:
> Alexander Cherepanov wrote:
>>
>> Is memchr on your arch guaranteed to work with an infinite size?
> 
> Yes it works fine. The AArch64 assembler functions have been carefully
> written to avoid overflows on the size as well as end-pointer comparisons.
> 

note that the libc implementation would not help
if the compiler assumed infinite size was ub..
the call would be dead code eliminated.

(which is why the compiler should not try to be
smart about library apis, the libc implementor
may want to give stricter guarantees.. this is
a common problem with gcc.)