This fixes odd SUCCEEDED dumps from the backthreader registry that
can happen even though register_jump_thread cancelled the thread
as invalid.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
* tree-ssa-threadbackward.cc (back_threader::maybe_register_path):
Check whether the registry register_path rejected the path.
(back_threader_registry::register_path): Return whether
register_jump_thread succeeded.
---
gcc/tree-ssa-threadbackward.cc | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/gcc/tree-ssa-threadbackward.cc b/gcc/tree-ssa-threadbackward.cc
index 3acd66a7780..332a1d2a1dd 100644
--- a/gcc/tree-ssa-threadbackward.cc
+++ b/gcc/tree-ssa-threadbackward.cc
@@ -243,10 +243,9 @@ back_threader::maybe_register_path ()
bool irreducible = false;
if (m_profit.profitable_path_p (m_path, m_name, taken_edge,
&irreducible)
- && debug_counter ())
+ && debug_counter ()
+ && m_registry.register_path (m_path, taken_edge))
{
- m_registry.register_path (m_path, taken_edge);
-
if (irreducible)
vect_free_loop_info_assumptions (m_path[0]->loop_father);
}
@@ -858,8 +857,7 @@ back_threader_registry::register_path (const
vec<basic_block> &m_path,
}
push_edge (jump_thread_path, taken_edge, EDGE_NO_COPY_SRC_BLOCK);
- register_jump_thread (jump_thread_path);
- return true;
+ return register_jump_thread (jump_thread_path);
}
// Thread all suitable paths in the current function.
--
2.35.3
