Ping.
https://gcc.gnu.org/ml/gcc-patches/2019-05/msg00477.html
Thanks,
Kyrill
On 5/10/19 10:32 AM, Kyrill Tkachov wrote:
Hi all,
This patch fixes the failing gcc.dg/vect/slp-reduc-sad-2.c testcase on
aarch64
by implementing a vec_init optab that can handle two half-width
vectors producing a full-width one
by concatenating them.
In the gcc.dg/vect/slp-reduc-sad-2.c case it's a V8QI reg concatenated
with a V8QI const_vector of zeroes.
This can be implemented efficiently using the aarch64_combinez pattern
that just loads a D-register to make
use of the implicit zero-extending semantics of that load.
Otherwise it concatenates the two vector using aarch64_simd_combine.
With this patch I'm seeing the effect from richi's original patch that
added gcc.dg/vect/slp-reduc-sad-2.c on aarch64
and 525.x264_r improves by about 1.5%.
Bootstrapped and tested on aarch64-none-linux-gnu. Also tested on
aarch64_be-none-elf.
Ok for trunk?
Thanks,
Kyrill
2019-10-05 Kyrylo Tkachov <[email protected]>
PR tree-optimization/90332
* config/aarch64/aarch64.c (aarch64_expand_vector_init):
Handle VALS containing two vectors.
* config/aarch64/aarch64-simd.md (*aarch64_combinez<mode>): Rename
to...
(@aarch64_combinez<mode>): ... This.
(*aarch64_combinez_be<mode>): Rename to...
(@aarch64_combinez_be<mode>): ... This.
(vec_init<mode><Vhalf>): New define_expand.
* config/aarch64/iterators.md (Vhalf): Handle V8HF.
