[gcc r13-2845] testsuite: Fix up avx256-unaligned-store-3.c test.

[hongtao Liu]

https://gcc.gnu.org/g:9c9cf4f087f28dc3bf8dfa769380b3b58728a0f7

commit r13-2845-g9c9cf4f087f28dc3bf8dfa769380b3b58728a0f7
Author: Hu, Lin1 <lin1.hu@intel.com>
Date:   Mon Sep 26 10:15:08 2022 +0800

    testsuite: Fix up avx256-unaligned-store-3.c test.
    
    gcc/testsuite/ChangeLog:
    
            PR target/94962
            * gcc.target/i386/avx256-unaligned-store-3.c: Add -mno-avx512f

Diff:
---
 gcc/testsuite/gcc.target/i386/avx256-unaligned-store-3.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-3.c b/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-3.c
index f909099bcb1..67635fb9e66 100644
--- a/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-3.c
+++ b/gcc/testsuite/gcc.target/i386/avx256-unaligned-store-3.c
@@ -1,5 +1,5 @@
 /* { dg-do compile } */
-/* { dg-options "-O3 -dp -mavx -mavx256-split-unaligned-store -mtune=generic -fno-common" } */
+/* { dg-options "-O3 -dp -mavx -mavx256-split-unaligned-store -mtune=generic -fno-common -mno-avx512f" } */
 
 #define N 1024