[Bug target/78853] aligned reads/writes (vmovdqa) emitted when no such guarantee can be made

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78853

--- Comment #4 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
See: http://refspecs.linuxfoundation.org/elf/x86-64-abi-0.99.pdf