https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69891
--- Comment #11 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Jakub Jelinek from comment #9)
> Created attachment 37801 [details]
> gcc6-pr69891.patch
>
> Full patch I'm going to bootstrap/regtest.
+/* PR rtl-optimization/69891 */
+/* { dg-do run } */
+/* { dg-options "-O -fno-tree-fre -mstringop-strategy=libcall -Wno-psabi" } */
+/* { dg-additional-options "-mno-sse" { target ia32 } } */
-mstringop-strategy is x86 specific option.
