2018-05-22  Luis Machado  <luis.machado@linaro.org>

	* tree-ssa-loop-prefetch.c (should_issue_prefetch_p): Cast value
	to HOST_WIDE_INT.

Index: gcc/tree-ssa-loop-prefetch.c
===================================================================
--- gcc/tree-ssa-loop-prefetch.c	(revision 260625)
+++ gcc/tree-ssa-loop-prefetch.c	(working copy)
@@ -1014,7 +1014,8 @@
 	fprintf (dump_file,
 		 "Step for reference %u:%u (%ld) is less than the mininum "
 		 "required stride of %d\n",
-		 ref->group->uid, ref->uid, int_cst_value (ref->group->step),
+		 ref->group->uid, ref->uid,
+		 (HOST_WIDE_INT) int_cst_value (ref->group->step),
 		 PREFETCH_MINIMUM_STRIDE);
       return false;
     }