* lto-partition.c (lto_balanced_map): Watch overflow.

From-SVN: r257939

diff --git a/gcc/lto/ChangeLog b/gcc/lto/ChangeLog
index 62fec49..55013a8 100644 (file)
--- a/gcc/lto/ChangeLog
+++ b/gcc/lto/ChangeLog
@@ -1,5 +1,9 @@
 2018-02-08  Jan Hubicka  <hubicka@ucw.cz>
 
+       * lto-partition.c (lto_balanced_map): Watch overflow.
+
+2018-02-08  Jan Hubicka  <hubicka@ucw.cz>
+
        PR ipa/81360
        * lto.c (unify_scc): Register prevailing trees, not trees to be freed.
        (read_cgraph_and_symbols): Use

diff --git a/gcc/lto/lto-partition.c b/gcc/lto/lto-partition.c
index 6055dad..60daafd 100644 (file)
--- a/gcc/lto/lto-partition.c
+++ b/gcc/lto/lto-partition.c
@@ -757,7 +757,8 @@ lto_balanced_map (int n_lto_partitions, int max_partition_size)
          if (npartitions < n_lto_partitions)
            partition_size = total_size / (n_lto_partitions - npartitions);
          else
-           partition_size = INT_MAX;
+           /* Watch for overflow.  */
+           partition_size = INT_MAX / 16;
 
          if (partition_size < PARAM_VALUE (MIN_PARTITION_SIZE))
            partition_size = PARAM_VALUE (MIN_PARTITION_SIZE);