This adds another dump of the SLP subgraph we're throwing at costing.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
2021-02-22 Richard Biener <rguent...@suse.de>
* tree-vect-slp.c (vect_bb_vectorization_profitable_p): Dump
costed subgraph.
---
gcc/tree-vect-slp.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/gcc/tree-vect-slp.c b/gcc/tree-vect-slp.c
index ea8a97b01c6..c521c34a83b 100644
--- a/gcc/tree-vect-slp.c
+++ b/gcc/tree-vect-slp.c
@@ -4366,6 +4366,15 @@ vect_bb_vectorization_profitable_p (bb_vec_info bb_vinfo,
unsigned int vec_inside_cost = 0, vec_outside_cost = 0, scalar_cost = 0;
unsigned int vec_prologue_cost = 0, vec_epilogue_cost = 0;
+ if (dump_enabled_p ())
+ {
+ dump_printf_loc (MSG_NOTE, vect_location, "Costing subgraph: \n");
+ hash_set<slp_tree> visited;
+ FOR_EACH_VEC_ELT (slp_instances, i, instance)
+ vect_print_slp_graph (MSG_NOTE, vect_location,
+ SLP_INSTANCE_TREE (instance), visited);
+ }
+
/* Calculate scalar cost and sum the cost for the vector stmts
previously collected. */
stmt_vector_for_cost scalar_costs = vNULL;
--
2.26.2
