[Bug target/38941] CX isn't preserved with shift
Andrew Thomas Pinski
pinskia@gmail.com
Fri Jan 23 04:39:00 GMT 2009
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
>
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