https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48227
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution|--- |FIXED
Target Milestone|--- |8.0
See Also| |https://gcc.gnu.org/bugzill
| |a/show_bug.cgi?id=81616
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
/* X86_TUNE_PAD_RETURNS: Place NOP before every RET that is a destination
of conditional jump or directly preceded by other jump instruction.
This is important for AND K8-AMDFAM10 because the branch prediction
architecture expect at most one jump per 2 byte window. Failing to
pad returns leads to misaligned return stack. */
DEF_TUNE (X86_TUNE_PAD_RETURNS, "pad_returns",
m_ATHLON_K8 | m_AMDFAM10)
Core2 issue was Fixed by r0-125351 for 4.9.0.
GCC 8 removed it even for generic by r8-5077.
So all fixed.
