From 9302b0743b366037379af0568534c23ab597b4d4 Mon Sep 17 00:00:00 2001 From: Richard Sandiford Date: Mon, 26 Jun 2023 13:48:35 +0100 Subject: [PATCH] vect: Cost intermediate conversions g:6f19cf7526168f8 extended N-vector to N-vector conversions to handle cases where an intermediate integer extension or truncation is needed. This patch adjusts the cost to account for these intermediate conversions. gcc/ * tree-vect-stmts.cc (vectorizable_conversion): Take multi_step_cvt into account when costing non-widening/truncating conversions. --- gcc/tree-vect-stmts.cc | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc index bf61461939b..b31971e99a4 100644 --- a/gcc/tree-vect-stmts.cc +++ b/gcc/tree-vect-stmts.cc @@ -5478,8 +5478,9 @@ vectorizable_conversion (vec_info *vinfo, if (modifier == NONE) { STMT_VINFO_TYPE (stmt_info) = type_conversion_vec_info_type; - vect_model_simple_cost (vinfo, stmt_info, ncopies, dt, ndts, slp_node, - cost_vec); + vect_model_simple_cost (vinfo, stmt_info, + ncopies * (1 + multi_step_cvt), + dt, ndts, slp_node, cost_vec); } else if (modifier == NARROW_SRC || modifier == NARROW_DST) {