1 files changed, 81 insertions, 0 deletions
diff --git a/libgcc/libgcov-driver.c b/libgcc/libgcov-driver.c
index 7bde526..754584d 100644
--- a/libgcc/libgcov-driver.c
+++ b/libgcc/libgcov-driver.c
@@ -665,6 +665,85 @@ merge_summary (const char *filename, int run_counted,
   return 0;
 }
 
+
+/* Sort N entries in VALUE_ARRAY in descending order.
+   Each entry in VALUE_ARRAY has two values. The sorting
+   is based on the second value.  */
+
+GCOV_LINKAGE  void
+gcov_sort_n_vals (gcov_type *value_array, int n)
+{
+  int j, k;
+
+  for (j = 2; j < n; j += 2)
+    {
+      gcov_type cur_ent[2];
+
+      cur_ent[0] = value_array[j];
+      cur_ent[1] = value_array[j + 1];
+      k = j - 2;
+      while (k >= 0 && value_array[k + 1] < cur_ent[1])
+        {
+          value_array[k + 2] = value_array[k];
+          value_array[k + 3] = value_array[k+1];
+          k -= 2;
+        }
+      value_array[k + 2] = cur_ent[0];
+      value_array[k + 3] = cur_ent[1];
+    }
+}
+
+/* Sort the profile counters for all indirect call sites. Counters
+   for each call site are allocated in array COUNTERS.  */
+
+static void
+gcov_sort_icall_topn_counter (const struct gcov_ctr_info *counters)
+{
+  int i;
+  gcov_type *values;
+  int n = counters->num;
+
+  gcc_assert (!(n % GCOV_ICALL_TOPN_NCOUNTS));
+  values = counters->values;
+
+  for (i = 0; i < n; i += GCOV_ICALL_TOPN_NCOUNTS)
+    {
+      gcov_type *value_array = &values[i + 1];
+      gcov_sort_n_vals (value_array, GCOV_ICALL_TOPN_NCOUNTS - 1);
+    }
+}
+
+/* Sort topn indirect_call profile counters in GI_PTR.  */
+
+static void
+gcov_sort_topn_counter_arrays (const struct gcov_info *gi_ptr)
+{
+  unsigned int i;
+  int f_ix;
+  const struct gcov_fn_info *gfi_ptr;
+  const struct gcov_ctr_info *ci_ptr;
+
+  if (!gi_ptr->merge[GCOV_COUNTER_ICALL_TOPNV]) 
+    return;
+
+  for (f_ix = 0; (unsigned)f_ix != gi_ptr->n_functions; f_ix++)
+    {
+      gfi_ptr = gi_ptr->functions[f_ix];
+      ci_ptr = gfi_ptr->ctrs;
+      for (i = 0; i < GCOV_COUNTERS; i++)
+        {
+          if (!gi_ptr->merge[i])
+            continue;
+          if (i == GCOV_COUNTER_ICALL_TOPNV)
+            {
+              gcov_sort_icall_topn_counter (ci_ptr);
+              break;
+            }
+          ci_ptr++;
+        }
+    }
+}
+
 /* Dump the coverage counts for one gcov_info object. We merge with existing
    counts when possible, to avoid growing the .da files ad infinitum. We use
    this program's checksum to make sure we only accumulate whole program
@@ -687,6 +766,8 @@ dump_one_gcov (struct gcov_info *gi_ptr, struct gcov_filename *gf,
   fn_buffer = 0;
   sum_buffer = 0;
 
+  gcov_sort_topn_counter_arrays (gi_ptr);
+
   error = gcov_exit_open_gcda_file (gi_ptr, gf);
   if (error == -1)
     return;