[Bug target/53383] Allow -mpreferred-stack-boundary=3 on x86-64

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383

--- Comment #14 from H.J. Lu <hjl.tools at gmail dot com> 2012-05-20 14:28:18 UTC ---
(In reply to comment #12)
> 
> Not when you call function with -fpreferred-stack-boundary=3
> and it is itself compiled with -fpreferred-stack-boudnary=4
> and calls another functions passing __int128.
> Thus the ABI incompatibility.

When everything is compiled with -fpreferred-stack-boundary=3,
it works fine.