[COMMITTED] Revert the avoid threading circular paths commit.
Commit Message
I've tested this patch on the wrong tree, and picked up the test changes
in a pending patch, without which this patch is no longer obvious.
Plus, it causes a regression in an invalid test I've recommended we remove.
I'm reverting this patch until the dependencies are reviewed.
Sorry for the noise.
gcc/ChangeLog:
* tree-ssa-threadbackward.c
(back_threader::maybe_register_path): Remove circular paths check.
---
gcc/tree-ssa-threadbackward.c | 4 ----
1 file changed, 4 deletions(-)
@@ -140,10 +140,6 @@ 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);