From: Robin Dapp <rdapp@ventanamicro.com>
Date: Sun, 16 Nov 2025 17:43:15 +0000 (+0100)
Subject: vect: Add vect-scalar-cost-multiplier for SLP.
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=a2f4b0466be29c853c32498ae49c1acfa1594f30;p=thirdparty%2Fgcc.git

vect: Add vect-scalar-cost-multiplier for SLP.

This adds the same vect-scalar-cost-multiplier to SLP costing that loop
costing already has.

gcc/ChangeLog:

	* tree-vect-slp.cc (vect_bb_vectorization_profitable_p):
	Multiply scalar cost by vect-scalar-cost-multiplier.
---

diff --git a/gcc/tree-vect-slp.cc b/gcc/tree-vect-slp.cc
index fbaff2f7e16..23098238b12 100644
--- a/gcc/tree-vect-slp.cc
+++ b/gcc/tree-vect-slp.cc
@@ -9811,7 +9811,8 @@ vect_bb_vectorization_profitable_p (bb_vec_info bb_vinfo,
       while (si < li_scalar_costs.length ()
 	     && li_scalar_costs[si].first == sl);
       scalar_target_cost_data->finish_cost (nullptr);
-      scalar_cost = scalar_target_cost_data->body_cost ();
+      scalar_cost = (scalar_target_cost_data->body_cost ()
+		     * param_vect_scalar_cost_multiplier) / 100;
 
       /* Complete the target-specific vector cost calculation.  */
       class vector_costs *vect_target_cost_data = init_cost (bb_vinfo, false);