[Bug testsuite/63305] ASan reported heap-buffer-overflow in gcc.target/i386/avx256-unaligned-load{store}-7.c

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63305

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
Created attachment 33566
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33566&action=edit
A patch

Please try this.