On Tue, Aug 02, 2016 at 10:31:33AM -0500, Segher Boessenkool wrote:
> On Wed, Aug 03, 2016 at 12:05:07AM +0930, Alan Modra wrote:
> > As noted in the last patch, rs6000_rtx_costs ought to cost slow
> > unaligned mems. This stops combine merging loads/stores with a
> > mode-changing SET subreg, if
On Wed, Aug 03, 2016 at 12:05:07AM +0930, Alan Modra wrote:
> As noted in the last patch, rs6000_rtx_costs ought to cost slow
> unaligned mems. This stops combine merging loads/stores with a
> mode-changing SET subreg, if the load/store in the subreg mode would
> be slow. Costing slow mems at 100
As noted in the last patch, rs6000_rtx_costs ought to cost slow
unaligned mems. This stops combine merging loads/stores with a
mode-changing SET subreg, if the load/store in the subreg mode would
be slow. Costing slow mems at 100 insns is just an order of magnitude
estimate. (The alignment inter
