[gcc r14-105] PR testsuite/106879 FAIL: gcc.dg/vect/bb-slp-layout-19.c on powerpc64

[gcc r14-105] PR testsuite/106879 FAIL: gcc.dg/vect/bb-slp-layout-19.c on powerpc64

[Jiu Fu Guo]

https://gcc.gnu.org/g:57e7229a29ca0e9929b61051e4f5857f0b41b6c7

commit r14-105-g57e7229a29ca0e9929b61051e4f5857f0b41b6c7
Author: Jiufu Guo <guojiufu@linux.ibm.com>
Date:   Tue Apr 18 15:56:53 2023 +0800

    PR testsuite/106879 FAIL: gcc.dg/vect/bb-slp-layout-19.c on powerpc64
    
    On P7, option -mno-allow-movmisalign is added during testing, which
    prevents slp happen on the case.
    
    Like PR65484 and PR87306, this patch use vect_hw_misalign to guard
    the case on powerpc targets.
    
    gcc/testsuite/ChangeLog:
    
            PR testsuite/106879
            * gcc.dg/vect/bb-slp-layout-19.c: Modify to guard the check with
            vect_hw_misalign on POWERs.

Diff:
---
 gcc/testsuite/gcc.dg/vect/bb-slp-layout-19.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-layout-19.c b/gcc/testsuite/gcc.dg/vect/bb-slp-layout-19.c
index f075a83a25b..847a07bd5be 100644
--- a/gcc/testsuite/gcc.dg/vect/bb-slp-layout-19.c
+++ b/gcc/testsuite/gcc.dg/vect/bb-slp-layout-19.c
@@ -31,4 +31,9 @@ void f()
   e[3] = b3;
 }
 
-/* { dg-final { scan-tree-dump-times "add new stmt: \[^\\n\\r\]* = VEC_PERM_EXPR" 3 "slp1" { target { vect_int_mult && vect_perm } } } } */
+/* On older powerpc hardware (POWER7 and earlier), the default flag
+   -mno-allow-movmisalign prevents vectorization.  On POWER8 and later,
+   when vect_hw_misalign is true, vectorization occurs.  For other
+   targets, ! vect_no_align is a sufficient test.  */
+
+/* { dg-final { scan-tree-dump-times "add new stmt: \[^\\n\\r\]* = VEC_PERM_EXPR" 3 "slp1" { target { { vect_int_mult && vect_perm } && { { ! powerpc*-*-* } || { vect_hw_misalign } } } } } } */