vect: Add null check for ptr_incr optional in vect_create_data_ref_ptr

gcc/ChangeLog:

	* tree-vect-data-refs.cc (vect_create_data_ref_ptr): Check for null
	pntr_incr.

diff --git a/gcc/tree-vect-data-refs.cc b/gcc/tree-vect-data-refs.cc
index 3b27beb9c5b6bbdf7a55a1dc002938833f29cfdc..6311e0d03df2a63d96c4e292398d522b828cdb81 100644 (file)
--- 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