Index: tree-predcom.c
===================================================================
--- tree-predcom.c	(revision 134253)
+++ tree-predcom.c	(working copy)
@@ -590,7 +590,8 @@ suitable_reference_p (struct data_refere
   tree ref = DR_REF (a), step = DR_STEP (a);
 
   if (!step
-      || !is_gimple_reg_type (TREE_TYPE (ref)))
+      || !is_gimple_reg_type (TREE_TYPE (ref))
+      || tree_could_throw_p (ref))
     return false;
 
   if (integer_zerop (step))