------- Comment #1 from rguenth at gcc dot gnu dot org 2009-09-25 09:06 -------
The interesting thing is that data-ref analysis sees 128bit alignment but
the vectorizer still produces
vect_var_.24_59 = M*vect_p.20_57{misalignment: 0};
D.2564_12 = *D.2563_11;
vect_var_.25_61 = vect_var_.24_59 * vect_cst_.26_60;
D.2565_13 = D.2564_12 * 2.2999999523162841796875e+0;
M*vect_p.27_64{misalignment: 0} = vect_var_.25_61;
thus, unknown misalignment.
(instantiate_scev
(instantiate_below = 3)
(evolution_loop = 1)
(chrec = {i_10(D), +, 4}_1)
(res = {i_10(D), +, 4}_1))
base_address: i_10(D)
offset from base address: 0
constant offset from base address: 0
step: 4
aligned to: 128
base_object: *i_10(D)
Creating dr for *D.2562_7
(res = {f_6(D), +, 4}_1))
base_address: f_6(D)
offset from base address: 0
constant offset from base address: 0
step: 4
aligned to: 128
base_object: *f_6(D)
t2.i:5: note: === vect_enhance_data_refs_alignment ===
t2.i:5: note: Vectorizing an unaligned access.
t2.i:5: note: Vectorizing an unaligned access.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |irar at gcc dot gnu dot org
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Keywords| |missed-optimization
Last reconfirmed|0000-00-00 00:00:00 |2009-09-25 09:06:12
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41464
