http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56812
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |WAITING
Last reconfirmed| |2013-04-02
Ever Confirmed|0 |1
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> 2013-04-02
13:20:47 UTC ---
It should not make a difference ... I see that vectorization is determined
to be not profitable though:
t.C:11: note: === vect_update_slp_costs_according_to_vf ===cost model: prologue
peel iters set to vf/2.cost model: epilogue peel iters set to vf/2 because
peeling for alignment is unknown.
t.C:11: note: Cost model analysis:
Vector inside of loop cost: 1
Vector prologue cost: 11
Vector epilogue cost: 2
Scalar iteration cost: 1
Scalar outside cost: 0
Vector outside cost: 13
prologue iterations: 2
epilogue iterations: 2
Calculated minimum iters for profitability: 17
but it's not vectorized with 4.8 either. -fno-vect-cost-model fixes this.
Are you sure you attached the correct testcase?
