The following dumps the first root stmt when analyzing a BB reduction.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
* tree-vect-slp.cc (vect_build_slp_instance): For BB reductions
note the first root stmt.
---
gcc/tree-vect-slp.cc | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/gcc/tree-vect-slp.cc b/gcc/tree-vect-slp.cc
index 6081948fed4..5fd9c8da89e 100644
--- a/gcc/tree-vect-slp.cc
+++ b/gcc/tree-vect-slp.cc
@@ -4213,6 +4213,13 @@ vect_build_slp_instance (vec_info *vinfo,
"Analyzing vectorizable control flow: %G",
root_stmt_infos[0]->stmt);
}
+ else if (kind == slp_inst_kind_bb_reduc)
+ {
+ if (dump_enabled_p ())
+ dump_printf_loc (MSG_NOTE, vect_location,
+ "Analyzing vectorizable BB reduction: %G",
+ root_stmt_infos[0]->stmt);
+ }
if (dump_enabled_p ())
{
--
2.51.0
