https://gcc.gnu.org/g:36aa66e23cda4ddd4650b64fae66bf1c77435a30
commit r17-4141-g36aa66e23cda4ddd4650b64fae66bf1c77435a30 Author: Aldy Hernandez <[email protected]> Date: Wed Sep 9 19:07:58 2026 +0000 backthreader: dump the per-block insn count again Now that the dust has settled, dump the per-block insn account. Tested on ppc64le Linux. gcc/ChangeLog: * tree-ssa-threadbackward.cc (back_threader_profitability): Remove the note on bb_insns. (back_threader_profitability::possibly_profitable_path_p): Dump each block's insn count. Diff: --- gcc/tree-ssa-threadbackward.cc | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/gcc/tree-ssa-threadbackward.cc b/gcc/tree-ssa-threadbackward.cc index 2493f134f87b..99e88e5e8f34 100644 --- a/gcc/tree-ssa-threadbackward.cc +++ b/gcc/tree-ssa-threadbackward.cc @@ -93,7 +93,6 @@ private: struct unwind_state { path_stats stats; - // Unused here; read by the per-block insn dump later in this series. int bb_insns; }; auto_vec<unwind_state, 20> m_unwind; @@ -757,6 +756,10 @@ back_threader_profitability::possibly_profitable_path_p for (unsigned j = 0; j < m_path.length (); j++) { fprintf (dump_file, " bb:%i", m_path[j]->index); + /* The last block on the path is not copied, so it has no + count of its own. */ + if (j + 1 < m_path.length ()) + fprintf (dump_file, " (%i insns)", m_unwind[j + 1].bb_insns); if (loop->latch == m_path[j]) fprintf (dump_file, " (latch)"); }
