[Bug sanitizer/63927] AddressSanitizer painfully slow on ppc64

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63927

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Right, but it is a library change, so somebody has to code it up, test and push
upstream first, then we can cherry-pick it.