https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113149
Bug ID: 113149
Summary: Function multiversioning prefers arch=x86-64-v3 to
actual processors
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: ed at catmur dot uk
Target Milestone: ---
Since #101696, we can write
__attribute__ ((target ("arch=x86-64-v3")))
char const* f() { return "x86-64-v3"; }
But x86-64-v3 is preferred to any of the processors that support this feature
set, which seems backwards - even Haswell supports pclmul and rdrnd, which
aren't in x86-64-v3.
It feels that it should be OK to swap the ordering of P_PROC_AVX2 with
P_X86_64_V3, and P_PROC_AVX512F with P_X86_64_V4, in enum feature_priority.
