ir_entity *copy_entity_own(ir_entity *old, ir_type *new_owner) { assert(is_entity(old)); assert(is_compound_type(new_owner)); assert(get_type_state(new_owner) != layout_fixed); if (old->owner == new_owner) return old; /* create a deep copy so we are safe of aliasing and double-freeing. */ ir_entity *newe = deep_entity_copy(old); newe->owner = new_owner; add_compound_member(new_owner, newe); return newe; }
/** * Post-Walker: find CopyB nodes. */ static void find_copyb_nodes(ir_node *irn, void *ctx) { if (!is_CopyB(irn)) return; ir_type *tp = get_CopyB_type(irn); if (get_type_state(tp) != layout_fixed) return; unsigned size = get_type_size(tp); bool medium_sized = max_small_size < size && size < min_large_size; if (medium_sized) return; /* Nothing to do for medium-sized CopyBs. */ /* Okay, either small or large CopyB, so link it in and lower it later. */ walk_env_t *env = (walk_env_t*)ctx; ARR_APP1(ir_node*, env->copybs, irn); }
/** * Lower a Sel node. Do not touch Sels accessing entities on the frame type. */ static void lower_sel(ir_node *sel) { ir_graph *irg = get_irn_irg(sel); ir_entity *ent = get_Sel_entity(sel); ir_type *owner = get_entity_owner(ent); dbg_info *dbg = get_irn_dbg_info(sel); ir_mode *mode = get_irn_mode(sel); ir_node *bl = get_nodes_block(sel); ir_node *newn; /* we can only replace Sels when the layout of the owner type is decided. */ if (get_type_state(owner) != layout_fixed) return; if (0 < get_Sel_n_indexs(sel)) { /* an Array access */ ir_type *basetyp = get_entity_type(ent); ir_mode *basemode; ir_node *index; if (is_Primitive_type(basetyp)) basemode = get_type_mode(basetyp); else basemode = mode_P_data; assert(basemode && "no mode for lowering Sel"); assert((get_mode_size_bits(basemode) % 8 == 0) && "can not deal with unorthodox modes"); index = get_Sel_index(sel, 0); if (is_Array_type(owner)) { ir_type *arr_ty = owner; size_t dims = get_array_n_dimensions(arr_ty); size_t *map = ALLOCAN(size_t, dims); ir_mode *mode_Int = get_reference_mode_signed_eq(mode); ir_tarval *tv; ir_node *last_size; size_t i; assert(dims == (size_t)get_Sel_n_indexs(sel) && "array dimension must match number of indices of Sel node"); for (i = 0; i < dims; i++) { size_t order = get_array_order(arr_ty, i); assert(order < dims && "order of a dimension must be smaller than the arrays dim"); map[order] = i; } newn = get_Sel_ptr(sel); /* Size of the array element */ tv = new_tarval_from_long(get_type_size_bytes(basetyp), mode_Int); last_size = new_rd_Const(dbg, irg, tv); /* * We compute the offset part of dimension d_i recursively * with the the offset part of dimension d_{i-1} * * off_0 = sizeof(array_element_type); * off_i = (u_i - l_i) * off_{i-1} ; i >= 1 * * whereas u_i is the upper bound of the current dimension * and l_i the lower bound of the current dimension. */ for (i = dims; i > 0;) { size_t dim = map[--i]; ir_node *lb, *ub, *elms, *n, *ind; elms = NULL; lb = get_array_lower_bound(arr_ty, dim); ub = get_array_upper_bound(arr_ty, dim); if (! is_Unknown(lb)) lb = new_rd_Conv(dbg, bl, copy_const_value(get_irn_dbg_info(sel), lb, bl), mode_Int); else lb = NULL; if (! is_Unknown(ub)) ub = new_rd_Conv(dbg, bl, copy_const_value(get_irn_dbg_info(sel), ub, bl), mode_Int); else ub = NULL; /* * If the array has more than one dimension, lower and upper * bounds have to be set in the non-last dimension. */ if (i > 0) { assert(lb != NULL && "lower bound has to be set in multi-dim array"); assert(ub != NULL && "upper bound has to be set in multi-dim array"); /* Elements in one Dimension */ elms = new_rd_Sub(dbg, bl, ub, lb, mode_Int); } ind = new_rd_Conv(dbg, bl, get_Sel_index(sel, dim), mode_Int); /* * Normalize index, id lower bound is set, also assume * lower bound == 0 */ if (lb != NULL) ind = new_rd_Sub(dbg, bl, ind, lb, mode_Int); n = new_rd_Mul(dbg, bl, ind, last_size, mode_Int); /* * see comment above. */ if (i > 0) last_size = new_rd_Mul(dbg, bl, last_size, elms, mode_Int); newn = new_rd_Add(dbg, bl, newn, n, mode); } } else { /* no array type */ ir_mode *idx_mode = get_irn_mode(index); ir_tarval *tv = new_tarval_from_long(get_mode_size_bytes(basemode), idx_mode); newn = new_rd_Add(dbg, bl, get_Sel_ptr(sel), new_rd_Mul(dbg, bl, index, new_r_Const(irg, tv), idx_mode), mode); } } else if (is_Method_type(get_entity_type(ent)) && is_Class_type(owner)) { /* We need an additional load when accessing methods from a dispatch * table. * Matze TODO: Is this really still used? At least liboo does its own * lowering of Method-Sels... */ ir_mode *ent_mode = get_type_mode(get_entity_type(ent)); int offset = get_entity_offset(ent); ir_mode *mode_Int = get_reference_mode_signed_eq(mode); ir_tarval *tv = new_tarval_from_long(offset, mode_Int); ir_node *cnst = new_rd_Const(dbg, irg, tv); ir_node *add = new_rd_Add(dbg, bl, get_Sel_ptr(sel), cnst, mode); ir_node *mem = get_Sel_mem(sel); newn = new_rd_Load(dbg, bl, mem, add, ent_mode, cons_none); newn = new_r_Proj(newn, ent_mode, pn_Load_res); } else { int offset = get_entity_offset(ent); /* replace Sel by add(obj, const(ent.offset)) */ newn = get_Sel_ptr(sel); if (offset != 0) { ir_mode *mode_UInt = get_reference_mode_unsigned_eq(mode); ir_tarval *tv = new_tarval_from_long(offset, mode_UInt); ir_node *cnst = new_r_Const(irg, tv); newn = new_rd_Add(dbg, bl, newn, cnst, mode); } } /* run the hooks */ hook_lower(sel); exchange(sel, newn); }
/** * Lower a all possible SymConst nodes. */ static void lower_symconst(ir_node *symc) { ir_node *newn; ir_type *tp; ir_entity *ent; ir_tarval *tv; ir_enum_const *ec; ir_mode *mode; ir_graph *irg; switch (get_SymConst_kind(symc)) { case symconst_type_size: /* rewrite the SymConst node by a Const node */ irg = get_irn_irg(symc); tp = get_SymConst_type(symc); assert(get_type_state(tp) == layout_fixed); mode = get_irn_mode(symc); newn = new_r_Const_long(irg, mode, get_type_size_bytes(tp)); assert(newn); /* run the hooks */ hook_lower(symc); exchange(symc, newn); break; case symconst_type_align: /* rewrite the SymConst node by a Const node */ irg = get_irn_irg(symc); tp = get_SymConst_type(symc); assert(get_type_state(tp) == layout_fixed); mode = get_irn_mode(symc); newn = new_r_Const_long(irg, mode, get_type_alignment_bytes(tp)); assert(newn); /* run the hooks */ hook_lower(symc); exchange(symc, newn); break; case symconst_addr_ent: /* leave */ break; case symconst_ofs_ent: /* rewrite the SymConst node by a Const node */ irg = get_irn_irg(symc); ent = get_SymConst_entity(symc); assert(get_type_state(get_entity_type(ent)) == layout_fixed); mode = get_irn_mode(symc); newn = new_r_Const_long(irg, mode, get_entity_offset(ent)); assert(newn); /* run the hooks */ hook_lower(symc); exchange(symc, newn); break; case symconst_enum_const: /* rewrite the SymConst node by a Const node */ irg = get_irn_irg(symc); ec = get_SymConst_enum(symc); assert(get_type_state(get_enumeration_owner(ec)) == layout_fixed); tv = get_enumeration_value(ec); newn = new_r_Const(irg, tv); assert(newn); /* run the hooks */ hook_lower(symc); exchange(symc, newn); break; default: assert(!"unknown SymConst kind"); break; } }