[Bug target/66697] Feature request: -mstackrealign and force_align_arg_pointer for x86_64

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66697

--- Comment #27 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 36457
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36457&action=edit
Backport for gcc-5 branch.