https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81303
Wilco <wilco at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-07-12
CC| |wilco at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #3 from Wilco <wilco at gcc dot gnu.org> ---
Confirmed, on AArch64 bwaves is ~20% slower in SPEC2006 and ~30% slower in
SPEC2017. There are twice as many spills (outside the inner loop) and the
vectors are created in an inefficient way:
ldr d4, [x5,x27]
ld1r {v6.2d}, [x5]
mov v6.d[1], v4.d[0]
add x5, x5, x26
fmla v1.2d, v20.2d, v6.2d
