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otherwise, if it supports vector\n+ masked load/store for mode for VECTYPE, return\n+ VECT_PARTIAL_VECTORS_WHILE_ULT; otherwise, return VECT_PARTIAL_VECTORS_NONE.\n+ If load/store with length or mask is supported and ELSVALS is not null,\n+ store the possible else values in the vector it points to. Unless FACTOR\n+ is null, *FACTOR is set to the number of separate subelements that each\n+ element of VECTYPE should be split into. (This is always 1 except in the\n+ case of VECT_PARTIAL_VECTORS_LEN when the machine mode of VECTYPE can only\n+ be supported by using a length in bytes instead of a length in lanes.)\n+ */\n+static enum vect_partial_vector_style\n+vect_get_partial_vector_style (tree vectype, bool is_load,\n+\t\t\t unsigned *factor = nullptr,\n+\t\t\t vec *elsvals = nullptr)\n+{\n+ machine_mode vecmode = TYPE_MODE (vectype);\n+\n+ /* TYPE_MODE tries to map vector modes that are unsupported by the target to\n+ same-sized scalar modes, so reject scalar modes here. */\n+ if (VECTOR_MODE_P (vecmode))\n+ {\n+ machine_mode mask_mode, vmode;\n+ if (get_len_load_store_mode (vecmode, is_load, nullptr, elsvals)\n+\t .exists (&vmode))\n+\t{\n+\t if (factor)\n+\t *factor = (vecmode == vmode) ? 1 : GET_MODE_UNIT_SIZE (vecmode);\n+\t return vect_partial_vectors_len;\n+\t}\n+\n+ if (factor)\n+\t*factor = 1;\n+\n+ if (targetm.vectorize.get_mask_mode (vecmode).exists (&mask_mode)\n+\t && can_vec_mask_load_store_p (vecmode, mask_mode, is_load, NULL,\n+\t\t\t\t\telsvals))\n+\t{\n+\t return vect_partial_vectors_while_ult;\n+\t}\n+ }\n+\n+ if (dump_enabled_p ())\n+ dump_printf_loc (MSG_NOTE, vect_location,\n+\t\t \"the target doesn't have the appropriate partial\"\n+\t\t \" vectorization %s for vector data type %T.\\n\",\n+\t\t is_load ? \"load\" : \"store\", vectype);\n+ return vect_partial_vectors_none;\n+}\n+\n /* Check whether a load or store statement in the loop or SLP group described by\n VINFO is possible using partial vectors. This is\n testing whether the vectorizer pass has the appropriate support,\n@@ -1627,28 +1677,23 @@ check_load_store_for_partial_vectors (vec_info *vinfo, tree vectype,\n \n poly_uint64 nunits = TYPE_VECTOR_SUBPARTS (vectype);\n poly_uint64 vf = LOOP_VINFO_VECT_FACTOR (loop_vinfo);\n- machine_mode mask_mode;\n- machine_mode vmode;\n- bool using_partial_vectors_p = false;\n- if (get_len_load_store_mode\n- (vecmode, is_load, nullptr, elsvals).exists (&vmode))\n+ unsigned factor;\n+ vect_partial_vector_style partial_vector_style\n+ = vect_get_partial_vector_style (vectype, is_load, &factor, elsvals);\n+\n+ if (partial_vector_style == vect_partial_vectors_len)\n {\n nvectors = group_memory_nvectors (group_size * vf, nunits);\n- unsigned factor = (vecmode == vmode) ? 1 : GET_MODE_UNIT_SIZE (vecmode);\n vect_record_len (vinfo, slp_node, nvectors, vectype, factor);\n- using_partial_vectors_p = true;\n }\n- else if (targetm.vectorize.get_mask_mode (vecmode).exists (&mask_mode)\n-\t && can_vec_mask_load_store_p (vecmode, mask_mode, is_load, NULL,\n-\t\t\t\t\t elsvals))\n+ else if (partial_vector_style == vect_partial_vectors_while_ult)\n {\n nvectors = group_memory_nvectors (group_size * vf, nunits);\n vect_record_mask (vinfo, slp_node, nvectors, vectype, scalar_mask);\n- using_partial_vectors_p = true;\n }\n-\n- if (!using_partial_vectors_p)\n+ else\n {\n+ gcc_assert (partial_vector_style == vect_partial_vectors_none);\n if (dump_enabled_p ())\n \tdump_printf_loc (MSG_MISSED_OPTIMIZATION, vect_location,\n \t\t\t \"can't operate on partial vectors because the\"\n","prefixes":["v7","04/10"]}