[Bug ada/46192] renaming of a volatile variable generates wrong code

[simon at pushface dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46192

--- Comment #3 from simon at pushface dot org 2011-02-11 18:18:26 UTC ---
(In reply to comment #2)
> Still present in gcc version 4.6.0 20110203 (experimental) [trunk revision
> 157963] for x86_64-apple-darwin10. Generated assembler is
> 
> _renaming__put_raw:
> LFB3:
>         movzbl  192, %eax
>         andl    $32, %eax
>         .align 4,0x90
> L3:
>         testb   %al, %al
>         je      L3
>         ret

That was at -O2. The code for -O1 is OK:

_renaming__put_raw:
LFB3:
L3:
        testb   $32, 192
        je      L3
        ret