[PATCH] Fix maybe_lower_iteration_bound leak (PR middle-end/56461)

[Jakub Jelinek]

Hi!

This function leaks the not_executed_last_iteration pointer set.

Fixed thusly, bootstrapped/regtested on x86_64-linux and i686-linux, ok for
trunk?

2013-02-27  Jakub Jelinek  <ja...@redhat.com>

        PR middle-end/56461
        * tree-ssa-loop-niter.c (maybe_lower_iteration_bound): Call
        pointer_set_destroy on not_executed_last_iteration.

--- gcc/tree-ssa-loop-niter.c.jj        2013-01-31 12:28:56.000000000 +0100
+++ gcc/tree-ssa-loop-niter.c   2013-02-27 17:29:57.155507388 +0100
@@ -3293,6 +3293,7 @@ maybe_lower_iteration_bound (struct loop
     }
   BITMAP_FREE (visited);
   queue.release ();
+  pointer_set_destroy (not_executed_last_iteration);
 }
 
 /* Records estimates on numbers of iterations of LOOP.  If USE_UNDEFINED_P

        Jakub