[gcc r14-4627] RISC-V Regression: Fix FAIL of bb-slp-68.c for RVV

[gcc r14-4627] RISC-V Regression: Fix FAIL of bb-slp-68.c for RVV

[Pan Li]

https://gcc.gnu.org/g:8544efd6d4aea46656c37b0e002503616f09edfc

commit r14-4627-g8544efd6d4aea46656c37b0e002503616f09edfc
Author: Juzhe-Zhong <juzhe.zhong@rivai.ai>
Date:   Fri Oct 13 14:01:26 2023 +0800

    RISC-V Regression: Fix FAIL of bb-slp-68.c for RVV
    
    Like comment said, this test failed on 64 bytes vector.
    Both RVV and GCN has 64 bytes vector.
    
    So it's more reasonable to use vect512.
    gcc/testsuite/ChangeLog:
    
            * gcc.dg/vect/bb-slp-68.c: Use vect512.

Diff:
---
 gcc/testsuite/gcc.dg/vect/bb-slp-68.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-68.c b/gcc/testsuite/gcc.dg/vect/bb-slp-68.c
index e7573a14933..2dd3d8ee90c 100644
--- a/gcc/testsuite/gcc.dg/vect/bb-slp-68.c
+++ b/gcc/testsuite/gcc.dg/vect/bb-slp-68.c
@@ -20,4 +20,4 @@ void foo ()
 
 /* We want to have the store group split into 4, 2, 4 when using 32byte vectors.
    Unfortunately it does not work when 64-byte vectors are available.  */
-/* { dg-final { scan-tree-dump-not "from scalars" "slp2" { xfail amdgcn-*-* } } } */
+/* { dg-final { scan-tree-dump-not "from scalars" "slp2" { xfail vect512 } } } */