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.
Tested on aarch64-linux-gnu & x86_64-linux-gnu. OK to install?
Richard
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 ae24f3e66e6..7bc602bf90a 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -5470,8 +5470,9 @@ 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)
{
--
2.25.1
