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tree-optimization/84646 - remove premature thread path rejection

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This removes a premature rejection that's done later in a different
way.

	PR tree-optimization/84646
	* tree-ssa-threadbackward.cc (back_threader::maybe_register_path):
	Remove premature cycle rejection.
This commit is contained in:
Richard Biener 2022-11-09 13:52:58 +01:00
parent 3ed1b4ce7c
commit 837be6c7cf
1 changed files with 7 additions and 16 deletions
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23
gcc/tree-ssa-threadbackward.cc
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@ -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))