[Bug sanitizer/63927] AddressSanitizer painfully slow on ppc64

[trippels at gcc dot gnu.org]

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

--- Comment #6 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
See: http://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi-1.9.html#STACK