diff options
Diffstat (limited to 'gcc/tree-vect-loop.c')
| -rw-r--r-- | gcc/tree-vect-loop.c | 18 |
1 files changed, 7 insertions, 11 deletions
diff --git a/gcc/tree-vect-loop.c b/gcc/tree-vect-loop.c index 4c86785..a2413bf 100644 --- a/gcc/tree-vect-loop.c +++ b/gcc/tree-vect-loop.c @@ -6368,24 +6368,20 @@ vectorizable_live_operation (gimple *stmt, int num_scalar = SLP_TREE_SCALAR_STMTS (slp_node).length (); int num_vec = SLP_TREE_NUMBER_OF_VEC_STMTS (slp_node); - int scalar_per_vec = num_scalar / num_vec; - /* There are three possibilites here: - 1: All scalar stmts fit in a single vector. - 2: All scalar stmts fit multiple times into a single vector. - We must choose the last occurence of stmt in the vector. - 3: Scalar stmts are split across multiple vectors. - We must choose the correct vector and mod the lane accordingly. */ + /* Get the last occurrence of the scalar index from the concatenation of + all the slp vectors. Calculate which slp vector it is and the index + within. */ + int pos = (num_vec * nunits) - num_scalar + slp_index; + int vec_entry = pos / nunits; + int vec_index = pos % nunits; /* Get the correct slp vectorized stmt. */ - int vec_entry = slp_index / scalar_per_vec; vec_lhs = gimple_get_lhs (SLP_TREE_VEC_STMTS (slp_node)[vec_entry]); /* Get entry to use. */ - bitstart = build_int_cst (unsigned_type_node, - scalar_per_vec - (slp_index % scalar_per_vec)); + bitstart = build_int_cst (unsigned_type_node, vec_index); bitstart = int_const_binop (MULT_EXPR, bitsize, bitstart); - bitstart = int_const_binop (MINUS_EXPR, vec_bitsize, bitstart); } else { |