libgcov: Fix merging of topn [PR92924]

	PR tree-optimization/92924
	* libgcov-merge.c (merge_topn_values_set): Fix merging.

diff --git a/libgcc/libgcov-merge.c b/libgcc/libgcov-merge.c
index b658aec46c6519348ff2dd1acdaee25b56506969..19b8ee72ae99f9434fce806922558f17c0114df6 100644 (file)
--- a/libgcc/libgcov-merge.c
+++ b/libgcc/libgcov-merge.c
@@ -112,9 +112,11 @@ merge_topn_values_set (gcov_type *counters)
   for (unsigned i = 0; i < GCOV_TOPN_VALUES; i++)
     {
       if (read_counters[2 * i + 1] == 0)
-       return;
+       continue;
 
       unsigned j;
+      int slot = -1;
+
       for (j = 0; j < GCOV_TOPN_VALUES; j++)
        {
          if (counters[2 * j] == read_counters[2 * i])
@@ -123,18 +125,23 @@ merge_topn_values_set (gcov_type *counters)
              break;
            }
          else if (counters[2 * j + 1] == 0)
-           {
-             counters[2 * j] += read_counters[2 * i];
-             counters[2 * j + 1] += read_counters[2 * i + 1];
-             break;
-           }
+           slot = j;
        }
 
-      /* We haven't found a slot, bail out.  */
       if (j == GCOV_TOPN_VALUES)
        {
-         counters[1] = -1;
-         return;
+         if (slot > 0)
+           {
+             /* If we found empty slot, add the value.  */
+             counters[2 * slot] = read_counters[2 * i];
+             counters[2 * slot + 1] = read_counters[2 * i + 1];
+           }
+         else
+           {
+             /* We haven't found a slot, bail out.  */
+             counters[1] = -1;
+             return;
+           }
        }
     }
 }