Re: [Bug target/38941] CX isn't preserved with shift

[Andrew Thomas Pinski <pinskia at gmail dot com>]

Sent from my iPhone

On Jan 22, 2009, at 8:34 PM, "hjl dot tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org 
> wrote:

> ------- Comment #2 from hjl dot tools at gmail dot com  2009-01-23  
> 04:34 -------
> How about this one:
>
> ---
> extern void abort (void);
>
> void
> foo (int x)
> {
>  if (x != 8)
>    abort ();
> }
>
> void
> bar (int g)
> {
>    register int x __asm__("ecx");
>    register int y __asm__("eax");
>    x = 5;
>    foo (1 << g);
>    asm ("mov %1, %0": "=r" (y): "r" (x));
Again still undefined because there is still inbetween the assignment  
and the inline-asm.

>    if (x != 5)
>      abort ();
>    if (y != 5)
>      abort ();
> }
>
> int
> main ()
> {
>  bar (3);
>  return 0;
> }
> ---
>
>
> --
>
> hjl dot tools at gmail dot com changed:
>
>           What    |Removed                     |Added
> --- 
> --- 
> ----------------------------------------------------------------------
>            Summary|CX isn't preserved with     |CX isn't preserved  
> with
>                   |shift                       |shift
>
>
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38941