diff options
| -rw-r--r-- | gcc/tree-ssa-threadbackward.cc | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gcc/tree-ssa-threadbackward.cc b/gcc/tree-ssa-threadbackward.cc index b886027..1c36283 100644 --- a/gcc/tree-ssa-threadbackward.cc +++ b/gcc/tree-ssa-threadbackward.cc @@ -355,6 +355,12 @@ back_threader::find_paths_to_names (basic_block bb, bitmap interesting, || maybe_register_path ())) ; + // The backwards thread copier cannot copy blocks that do not belong + // to the same loop, so when the new source of the path entry no + // longer belongs to it we don't need to search further. + else if (m_path[0]->loop_father != bb->loop_father) + ; + // Continue looking for ways to extend the path but limit the // search space along a branch else if ((overall_paths = overall_paths * EDGE_COUNT (bb->preds)) |