[Bug target/79262] [8/9/10 Regression] load gap with store gap causing performance regression in 462.libquantum

[wilco at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79262

--- Comment #8 from Wilco <wilco at gcc dot gnu.org> ---
Author: wilco
Date: Tue Nov 19 15:57:54 2019
New Revision: 278452

URL: https://gcc.gnu.org/viewcvs?rev=278452&root=gcc&view=rev
Log:
[AArch64] PR79262: Adjust vector cost

PR79262 has been fixed for almost all AArch64 cpus, however the example is
still
vectorized in a few cases, resulting in lower performance.  Adjust the vector
cost slightly so that so that -mcpu=cortex-a53 now has identical performance as
-mcpu=cortex-a57 on libquantum.

    gcc/
        PR target/79262
        * config/aarch64/aarch64.c (generic_vector_cost): Adjust
        vec_to_scalar_cost.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/config/aarch64/aarch64.c