Hi, I have a question regarding where certain optimization takes place. Given the following code: 235 u32 string_area_size; 237 u32 cid_list_size; 239 u32 count; ... 294 cid_list_size = sizeof(struct acpica_device_id_list) + 295 ((count - 1) * sizeof(struct acpica_device_id)) + string_area_size; I get the following ssa representation: D.27638_41 = count_7 + 268435455; D.27639_42 = D.27638_41 * 16; D.27640_43 = D.27639_42 + string_area_size_4; cid_list_size_44 = D.27640_43 + 24; D.27641_45 = (acpi_size) cid_list_size_44; As you can see, the computation of (count - 1) * sizeof(...) is based on unsigned integer truncation. Can you tell me where exactly in gcc this optimization happens? (which file/function) Thanks, Emese
