https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115342
Bug ID: 115342
Summary: [14/15 Regression] AArch64: Function multiversioning
initialization incorrect
Product: gcc
Version: 14.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: wilco at gcc dot gnu.org
Target Milestone: ---
The CPU features initialization code uses CPUID registers. It uses incorrect
comparisons so that for example SVE is not set if SVE2 is available. Using
HWCAPs for these is both simpler and works correctly. The initialization must
also be done atomically so to avoid multiple threads causing corruption due to
non-atomic RMW of the global.
