[Bug lto/66752] spec2000 255.vortex performance compiled with GCC is ~20% lower than with CLANG

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66752

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Looks like bug 13876.