There's a missed index adjustment for the SLP vector number when
computing the index/data vectors for emulated gather/scatter with SLP.
The following fixes this.
Bootstrapped and tested on x86_64-unknown-linux-gnu, pushed.
PR tree-optimization/111970
* tree-vect-stmts.cc (vectorizable_load): Fix offset calculation
for SLP gather load.
(vectorizable_store): Likewise for SLP scatter store.
---
gcc/tree-vect-stmts.cc | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/gcc/tree-vect-stmts.cc b/gcc/tree-vect-stmts.cc
index 96e4a6cffad..bf8c99779ae 100644
--- a/gcc/tree-vect-stmts.cc
+++ b/gcc/tree-vect-stmts.cc
@@ -9188,7 +9188,8 @@ vectorizable_store (vec_info *vinfo,
unsigned HOST_WIDE_INT factor
= const_offset_nunits / const_nunits;
vec_offset = vec_offsets[(vec_num * j + i) / factor];
- unsigned elt_offset = (j % factor) * const_nunits;
+ unsigned elt_offset
+ = ((vec_num * j + i) % factor) * const_nunits;
tree idx_type = TREE_TYPE (TREE_TYPE (vec_offset));
tree scale = size_int (gs_info.scale);
align = get_object_alignment (DR_REF (first_dr_info->dr));
@@ -11150,7 +11151,8 @@ vectorizable_load (vec_info *vinfo,
unsigned HOST_WIDE_INT factor
= const_offset_nunits / const_nunits;
vec_offset = vec_offsets[(vec_num * j + i) / factor];
- unsigned elt_offset = (j % factor) * const_nunits;
+ unsigned elt_offset
+ = ((vec_num * j + i) % factor) * const_nunits;
tree idx_type = TREE_TYPE (TREE_TYPE (vec_offset));
tree scale = size_int (gs_info.scale);
align = get_object_alignment (DR_REF (first_dr_info->dr));
--
2.35.3
