Remove unused variable in tree-ssa-loop-im.c

[Jan Hubicka]

Hi,
this is another artifcat of my conversion.  freq_sum is now unused (but not 
reported
because of += which we possibly could also warn for I guess)

Bootstrapped/regtested x86_64-linux, comitted.

        * tree-ssa-loop-im.c (execute_sm_if_changed): Do not compute freq_sum.
Index: tree-ssa-loop-im.c
===================================================================
--- tree-ssa-loop-im.c  (revision 254651)
+++ tree-ssa-loop-im.c  (working copy)
@@ -1781,7 +1781,6 @@
   struct prev_flag_edges *prev_edges = (struct prev_flag_edges *) ex->aux;
   bool irr = ex->flags & EDGE_IRREDUCIBLE_LOOP;
 
-  int freq_sum = 0;
   profile_count count_sum = profile_count::zero ();
   int nbbs = 0, ncount = 0;
   profile_probability flag_probability = profile_probability::uninitialized ();
@@ -1803,7 +1802,6 @@
   for (hash_set<basic_block>::iterator it = flag_bbs->begin ();
        it != flag_bbs->end (); ++it)
     {
-       freq_sum += (*it)->count.to_frequency (cfun);
        if ((*it)->count.initialized_p ())
          count_sum += (*it)->count, ncount ++;
        if (dominated_by_p (CDI_DOMINATORS, ex->src, *it))