Remove max_count computation from ipa-inline

[Jan Hubicka]

Hi,
Ipa inline computes max_count which used to be applied later to compute badness
before it was converted to sreal.  Now it is only used in couple of places to 
see
if any IPA profile is presents at all.  This patch replaces this by more 
specific
flag has_nonzero_ipa_profile

Bootstrapped/regtested x86_64-linux, comitted.

gcc/ChangeLog:

        * ipa-inline.cc (max_count): Remove.
        (has_nonzero_ipa_profile): New.
        (inline_small_functions): Update.
        (dump_inline_stats): Update.

diff --git a/gcc/ipa-inline.cc b/gcc/ipa-inline.cc
index b71ebbe60fd..1f2287da896 100644
--- a/gcc/ipa-inline.cc
+++ b/gcc/ipa-inline.cc
@@ -175,7 +175,7 @@ typedef fibonacci_node <inline_badness, cgraph_edge> 
edge_heap_node_t;
 
 /* Statistics we collect about inlining algorithm.  */
 static int overall_size;
-static profile_count max_count;
+static bool has_nonzero_ipa_profile;
 static profile_count spec_rem;
 
 /* Return false when inlining edge E would lead to violating
@@ -2105,7 +2105,7 @@ inline_small_functions (void)
   /* Compute overall unit size and other global parameters used by badness
      metrics.  */
 
-  max_count = profile_count::uninitialized ();
+  has_nonzero_ipa_profile = false;
   ipa_reduced_postorder (order, true, ignore_edge_p);
   free (order);
 
@@ -2148,7 +2148,9 @@ inline_small_functions (void)
          }
 
        for (edge = node->callers; edge; edge = edge->next_caller)
-         max_count = max_count.max (edge->count.ipa ());
+         if (edge->count.ipa ().initialized_p ()
+             && edge->count.ipa ().nonzero_p ())
+         has_nonzero_ipa_profile = true;
       }
   ipa_free_postorder_info ();
   initialize_growth_caches ();
@@ -2221,7 +2223,7 @@ inline_small_functions (void)
     }
 
   gcc_assert (in_lto_p
-             || !(max_count > 0)
+             || !has_nonzero_ipa_profile
              || flag_auto_profile
              || (profile_info && flag_branch_probabilities));
 
@@ -2243,7 +2245,7 @@ inline_small_functions (void)
         This check is affected by scaling roundoff errors when compiling for
         IPA this we skip it in that case.  */
       if (flag_checking && !edge->callee->count.ipa_p ()
-         && (!max_count.initialized_p () || !max_count.nonzero_p ()))
+         && !has_nonzero_ipa_profile)
        {
          sreal cached_badness = edge_badness (edge, false);
 
@@ -2762,7 +2764,7 @@ dump_inline_stats (void)
       else if (e->count.ipa ().initialized_p ())
        indirect_cnt += e->count.ipa ().to_gcov_type ();
   }
-  if (max_count.initialized_p ())
+  if (has_nonzero_ipa_profile)
     {
       fprintf (dump_file,
               "Inlined %" PRId64 " + speculative "