[Bug target/69463] wrong code with -O1 and vector arithmetics @ x86_64

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69463

--- Comment #2 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Zdenek Sojka from comment #1)
> On trunk, this got fixed between r232939 (fails) and r232986 (OK). r232955
> fixed PR69459, so this might be a duplicate.

There are actually two bugs in the compiler. One is PR69459, now fixed in 4.9+,
the other is PR69551, which needs to be backported to 4.9 branch.

Until PR69551 fix is backported to 4.9 branch, you can trigger PR69551 with -O2
-msse -mno-sse2.