Re: completion on brace + 4 characters doesn't work

[Vincent Lefevre <vincent@vinc17.net>]

On 2011-04-29 13:15:58 +0200, Vincent Lefevre wrote:
> In fact, the behavior comes from glibc on x86_64. It can be
> reproduced with:
> 
> #include <stdio.h>
> #include <string.h>
> 
> int main (void)
> {
>   static char s[] = "{abcd";
>   volatile int len = 1;
> 
>   printf ("s = %s\n", s);
>   strcpy (s, s + len);
>   printf ("s = %s\n", s);
>   return 0;
> }
> 
> and gcc -fno-builtin (the strcpy builtin was not used anyway).
> 
> According to gdb, the source in eglibc-2.11.2 is
> sysdeps/x86_64/multiarch/strcpy.S (strcpy with SSSE3). It can load
> 16 bytes at a time, and it uses special code on these 16 bytes (I'm
> not sure, but it seems to have code for each length).

FYI, this new strcpy code breaks many applications:

  http://sourceware.org/bugzilla/show_bug.cgi?id=12518

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Vincent Lefèvre <vincent@vinc17.net> - Web: <http://www.vinc17.net/>
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