RVV vectorize it with stride5 load_lanes.
gcc/testsuite/ChangeLog:
* gcc.dg/vect/slp-perm-4.c: Adapt test for stride5 load_lanes.
/* { dg-final { scan-tree-dump-times "vectorized 1 loops" 1 "vect" } } */
/* { dg-final { scan-tree-dump-times "gaps requires scalar epilogue loop" 0 "vect" } } */
-/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" } } */
+/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 1 "vect" { target { ! { vect_load_lanes && vect_strided5 } } } } } */