volatile correctness: combine vs. target.md

[Richard Henderson]

On 12/02/2011 06:35 AM, Richard Guenther wrote:
> I see.  As we do not explicitely model this dependency we probably
> get lucky by the if (gimple_has_volatile_ops ()) bail-out; most
> passes do.

What are you talking about?  Of course we do.

> int
> read_dependence (const_rtx mem, const_rtx x)
> {
>   return MEM_VOLATILE_P (x) && MEM_VOLATILE_P (mem);
> }

et al.


r~