diff options
Diffstat (limited to 'gcc/tree-vect-loop.cc')
| -rw-r--r-- | gcc/tree-vect-loop.cc | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/gcc/tree-vect-loop.cc b/gcc/tree-vect-loop.cc index 4860bfd..896218f 100644 --- a/gcc/tree-vect-loop.cc +++ b/gcc/tree-vect-loop.cc @@ -4997,17 +4997,21 @@ vect_find_reusable_accumulator (loop_vec_info loop_vinfo, if (!constant_multiple_p (TYPE_VECTOR_SUBPARTS (old_vectype), TYPE_VECTOR_SUBPARTS (vectype), &m)) return false; - /* Check the intermediate vector types are available. */ - while (m > 2) + /* Check the intermediate vector types and operations are available. */ + tree prev_vectype = old_vectype; + poly_uint64 intermediate_nunits = TYPE_VECTOR_SUBPARTS (old_vectype); + while (known_gt (intermediate_nunits, TYPE_VECTOR_SUBPARTS (vectype))) { - m /= 2; + intermediate_nunits = exact_div (intermediate_nunits, 2); tree intermediate_vectype = get_related_vectype_for_scalar_type - (TYPE_MODE (vectype), TREE_TYPE (vectype), - exact_div (TYPE_VECTOR_SUBPARTS (old_vectype), m)); + (TYPE_MODE (vectype), TREE_TYPE (vectype), intermediate_nunits); if (!intermediate_vectype || !directly_supported_p (STMT_VINFO_REDUC_CODE (reduc_info), - intermediate_vectype)) + intermediate_vectype) + || !can_vec_extract (TYPE_MODE (prev_vectype), + TYPE_MODE (intermediate_vectype))) return false; + prev_vectype = intermediate_vectype; } /* Non-SLP reductions might apply an adjustment after the reduction |