diff options
| -rw-r--r-- | gcc/tree-ssa-threadbackward.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/tree-ssa-threadbackward.c b/gcc/tree-ssa-threadbackward.c index a6b9893a..d9ce056 100644 --- a/gcc/tree-ssa-threadbackward.c +++ b/gcc/tree-ssa-threadbackward.c @@ -140,6 +140,10 @@ back_threader::maybe_register_path () if (taken_edge && taken_edge != UNREACHABLE_EDGE) { + // Avoid circular paths. + if (m_visited_bbs.contains (taken_edge->dest)) + return UNREACHABLE_EDGE; + bool irreducible = false; bool profitable = m_profit.profitable_path_p (m_path, m_name, taken_edge, &irreducible); |