Hi,
On 23 May 2017 at 17:59, Robin Dapp <rd...@linux.vnet.ibm.com> wrote:
> gcc/ChangeLog:
>
> 2017-05-23 Robin Dapp <rd...@linux.vnet.ibm.com>
>
> * tree-vect-data-refs.c (vect_get_data_access_cost):
> Workaround for SLP handling.
> (vect_enhance_data_refs_alignment):
> Compute costs for doing no peeling at all, compare to the best
> peeling costs so far and avoid peeling if cheaper.
Since this commit (r248678), I've noticed regressions on some arm targets.
Executed from: gcc.dg/tree-ssa/tree-ssa.exp
gcc.dg/tree-ssa/gen-vect-26.c scan-tree-dump-times vect "Alignment
of access forced using peeling" 1
gcc.dg/tree-ssa/gen-vect-26.c scan-tree-dump-times vect
"Vectorizing an unaligned access" 0
gcc.dg/tree-ssa/gen-vect-28.c scan-tree-dump-times vect "Alignment
of access forced using peeling" 1
gcc.dg/tree-ssa/gen-vect-28.c scan-tree-dump-times vect
"Vectorizing an unaligned access" 0
For instance with --target arm-linux-gnueabihf --with-cpu=cortex-a5
--with-fpu=vfpv3-d16-fp16
(using cortex-a9+neon makes the test pass).
Thanks,
Christophe
