+
−/* { dg-do compile } */
+
−/* { dg-options "-O2" } */
+
−
+
−void bar (int);
+
−
+
−void
+
−foo ()
+
−{
+
− int index = 0;
+
−
+
− for (index; index <= 10; index--)
+
−   /* Result of the following multiply will overflow
+
−      when converted to signed int.  */
+
−   bar ((0xcafe + index) * 0xdead);  /* { dg-warning "iteration \[0-9\]+ invokes undefined behavior" } */
+
−}