https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95259
Bug ID: 95259
Summary: Duplicated codes in libgcc, driver-i386.c and
i386-builtins.c
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: hjl.tools at gmail dot com
CC: ubizjak at gmail dot com
Depends on: 95258, 91695, 95212, 95220
Target Milestone: ---
Target: i386, x86-64
There are duplicated codes in libgcc, driver-i386.c and i386-builtins.c.
It is very hard to keep them in sync and up to date. libgcc doesn't enable
any AVX512 ISAs if AVX512 isn't usable. But driver-i386.c only does it for
some AVX512 ISAs. libgcc only supports a subset of ISAs.
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91695
[Bug 91695] [X86] get_available_features only sets FEATURE_GFNI and
FEATURE_VPCLMULQDQ when avx512_usable is true
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95212
[Bug 95212] enum processor_features is out of sync
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95220
[Bug 95220] Incorrect GFNI dectection
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95258
[Bug 95258] -march=native doesn't handle -mavx512vpopcntdq
