tree-optimization/84646 - remove premature thread path rejection
Checks
Commit Message
This removes a premature rejection that's done later in a different
way.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
PR tree-optimization/84646
* tree-ssa-threadbackward.cc (back_threader::maybe_register_path):
Remove premature cycle rejection.
---
gcc/tree-ssa-threadbackward.cc | 23 +++++++----------------
1 file changed, 7 insertions(+), 16 deletions(-)
@@ -249,25 +249,16 @@ back_threader::maybe_register_path (back_threader_profitability &profit)
if (taken_edge && taken_edge != UNREACHABLE_EDGE)
{
- if (m_visited_bbs.contains (taken_edge->dest))
+ bool irreducible = false;
+ if (profit.profitable_path_p (m_path, taken_edge, &irreducible)
+ && debug_counter ()
+ && m_registry.register_path (m_path, taken_edge))
{
- // Avoid circular paths by indicating there is nothing to
- // see in this direction.
- taken_edge = UNREACHABLE_EDGE;
+ if (irreducible)
+ vect_free_loop_info_assumptions (m_path[0]->loop_father);
}
else
- {
- bool irreducible = false;
- if (profit.profitable_path_p (m_path, taken_edge, &irreducible)
- && debug_counter ()
- && m_registry.register_path (m_path, taken_edge))
- {
- if (irreducible)
- vect_free_loop_info_assumptions (m_path[0]->loop_father);
- }
- else
- taken_edge = NULL;
- }
+ taken_edge = NULL;
}
if (dump_file && (dump_flags & TDF_DETAILS))