[Bug tree-optimization/50480] 10% performance regression on Spec2006 410.bwaves

[kirill.yukhin at intel dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50480

--- Comment #4 from Yukhin Kirill <kirill.yukhin at intel dot com> 2011-09-27 08:31:35 UTC ---
(In reply to comment #3)
> For 32bit only it seems.  Supposedly a cost model issue, the register pressure
> will be higher and we have only half the number of SSE regs.

Richard, what's wrong maybe with cost model? If you're increasing liverange and
you have not as much registers (32-bit case), obviously register pressure will
increase and degrade performance. But again, how it is connected with cost
model?