Preserve ->move_dr behavior when adjusting epilogue info

When update_epilogue_loop_vinfo relates the shared loop DRs with
the epilogue stmts and infos it should not fiddle with how
pattern recognition applied move_dr.

	* tree-vect-loop.cc (update_epilogue_loop_vinfo): A DRs
	main stmt vinfo dr_aux should refer to a pattern stmt
	which is how move_dr sets this up.  We shouldn't undo this.

diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc
index 7ed3a56bc68031ab74ffe55cc055b3d54a90337b..dd18ec9ff1757f836d2a8c46be0dba9aecee474f 100644 (file)
--- a/gcc/tree-vect-loop.cc
+++ b/gcc/tree-vect-loop.cc
@@ -12291,7 +12291,6 @@ update_epilogue_loop_vinfo (class loop *epilogue, tree advance)
                                     &find_in_mapping, &mapping);
        }
       DR_STMT (dr) = STMT_VINFO_STMT (stmt_vinfo);
-      stmt_vinfo->dr_aux.stmt = stmt_vinfo;
     }
 
   epilogue_vinfo->shared->datarefs_copy.release ();