diff options
Diffstat (limited to 'gcc/tree-vect-stmts.c')
| -rw-r--r-- | gcc/tree-vect-stmts.c | 45 |
1 files changed, 37 insertions, 8 deletions
diff --git a/gcc/tree-vect-stmts.c b/gcc/tree-vect-stmts.c index 5b94d41..5a5a4da 100644 --- a/gcc/tree-vect-stmts.c +++ b/gcc/tree-vect-stmts.c @@ -5682,15 +5682,11 @@ vectorizable_shift (vec_info *vinfo, if (dump_enabled_p ()) dump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location, "op not supported by target.\n"); - /* Check only during analysis. */ - if (maybe_ne (GET_MODE_SIZE (vec_mode), UNITS_PER_WORD) - || (!vec_stmt - && !vect_can_vectorize_without_simd_p (code))) - return false; - if (dump_enabled_p ()) - dump_printf_loc (MSG_NOTE, vect_location, - "proceeding using word mode.\n"); + return false; } + /* vector lowering cannot optimize vector shifts using word arithmetic. */ + if (vect_emulated_vector_p (vectype)) + return false; if (!vec_stmt) /* transformation not required. */ { @@ -6076,6 +6072,7 @@ vectorizable_operation (vec_info *vinfo, != CODE_FOR_nothing); } + bool using_emulated_vectors_p = vect_emulated_vector_p (vectype); if (!target_support_p) { if (dump_enabled_p ()) @@ -6088,6 +6085,15 @@ vectorizable_operation (vec_info *vinfo, if (dump_enabled_p ()) dump_printf_loc (MSG_NOTE, vect_location, "proceeding using word mode.\n"); + using_emulated_vectors_p = true; + } + + if (using_emulated_vectors_p + && !vect_can_vectorize_without_simd_p (code)) + { + if (dump_enabled_p ()) + dump_printf (MSG_NOTE, "using word mode not possible.\n"); + return false; } int reduc_idx = STMT_VINFO_REDUC_IDX (stmt_info); @@ -6134,6 +6140,29 @@ vectorizable_operation (vec_info *vinfo, DUMP_VECT_SCOPE ("vectorizable_operation"); vect_model_simple_cost (vinfo, stmt_info, ncopies, dt, ndts, slp_node, cost_vec); + if (using_emulated_vectors_p) + { + /* The above vect_model_simple_cost call handles constants + in the prologue and (mis-)costs one of the stmts as + vector stmt. See tree-vect-generic.c:do_plus_minus/do_negate + for the actual lowering that will be applied. */ + unsigned n + = slp_node ? SLP_TREE_NUMBER_OF_VEC_STMTS (slp_node) : ncopies; + switch (code) + { + case PLUS_EXPR: + n *= 5; + break; + case MINUS_EXPR: + n *= 6; + break; + case NEGATE_EXPR: + n *= 4; + break; + default:; + } + record_stmt_cost (cost_vec, n, scalar_stmt, stmt_info, 0, vect_body); + } return true; } |