On Fri, Nov 04, 2011 at 08:48:30AM -0700, Richard Henderson wrote:
> On 11/04/2011 03:57 AM, Jakub Jelinek wrote:
> > + /* Optimize. If mask is known to have all high bits set,
> > + replace op0 with pc_rtx to signal that the instruction
> > + overwrites the whole destination and doesn't use its
> > + previous contents. */
>
> Why pass in PC, rather than nothing?
I wanted to avoid adding an extra set of expanders, if there is something,
I can use the same expander and just different insns. There are currently
16 expanders, we'd need another 16 for that.
Jakub
