[Bug target/69459] [5/6 Regression] wrong code with -O2 and vector arithmetics @ x86_64

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69459

--- Comment #8 from Uroš Bizjak <ubizjak at gmail dot com> ---
Created attachment 37510
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=37510&action=edit
Proposed patch

Patch in testing.