https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84201
Bug ID: 84201
Summary: 549.fotonik3d_r from SPEC2017 fails verification with
-mprefer-vector-width=256 or 512 on Zen
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jamborm at gcc dot gnu.org
Target Milestone: ---
I'm not sure if I can post any more details than what the subject
says. On AMD EPYC and Ryzen machines (at least), 549.fotonik3d_r from
SPEC 2017 fails with a verification error when compiled with any of
the following combination of options:
-Ofast -g -march=native -mtune=native -mprefer-vector-width=256
-Ofast -g -march=native -mtune=native -mprefer-vector-width=512
Unfortunately, it does not fail the test run but only the reference
run.
