[PATCH v3 1/2] vect: add null check for ptr_incr optional in vect_create_data_ref_ptr

[Alfie Richards]

gcc/ChangeLog:

        * tree-vect-data-refs.cc (vect_create_data_ref_ptr): Check for null
        pntr_incr.
---
 gcc/tree-vect-data-refs.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gcc/tree-vect-data-refs.cc b/gcc/tree-vect-data-refs.cc
index 3b27beb9c5b..6311e0d03df 100644
--- a/gcc/tree-vect-data-refs.cc
+++ b/gcc/tree-vect-data-refs.cc
@@ -5878,7 +5878,8 @@ vect_create_data_ref_ptr (vec_info *vinfo, stmt_vec_info 
stmt_info,
     {
       gcc_assert (bb_vinfo);
       only_init = true;
-      *ptr_incr = NULL;
+      if (ptr_incr)
+       *ptr_incr = NULL;
     }
 
   /* Create an expression for the first address accessed by this load
-- 
2.34.1