ir_entity *gcji_get_rtti_entity(ir_type *type)
{
if (is_Pointer_type(type)) {
ir_type *points_to = get_pointer_points_to_type(type);
if (is_Class_type(points_to))
return oo_get_class_rtti_entity(points_to);
return NULL;
} else if (is_Primitive_type(type)) {
if (type == type_boolean)
return gcj_boolean_rtti_entity;
if (type == type_byte)
return gcj_byte_rtti_entity;
if (type == type_char)
return gcj_char_rtti_entity;
if (type == type_short)
return gcj_short_rtti_entity;
if (type == type_int)
return gcj_int_rtti_entity;
if (type == type_long)
return gcj_long_rtti_entity;
if (type == type_float)
return gcj_float_rtti_entity;
if (type == type_double)
return gcj_double_rtti_entity;
panic("unexpected type");
} else {
return oo_get_class_rtti_entity(type);
}
}
ir_node *gcji_allocate_array(ir_type *eltype, ir_node *count)
{
ir_node *jclass = gcji_get_runtime_classinfo(eltype);
ir_node *res;
ir_node *new_mem;
if (is_Primitive_type(eltype)) {
ir_node *addr = new_Address(gcj_new_prim_array_entity);
ir_node *args[] = { jclass, count };
ir_type *call_type = get_entity_type(gcj_new_prim_array_entity);
ir_node *mem = get_store();
ir_node *call = new_Call(mem, addr, ARRAY_SIZE(args), args,
call_type);
ir_node *ress = new_Proj(call, mode_T, pn_Call_T_result);
new_mem = new_Proj(call, mode_M, pn_Call_M);
res = new_r_Proj(ress, mode_reference, 0);
} else {
ir_node *addr = new_Address(gcj_new_object_array_entity);
ir_node *null = new_Const(get_mode_null(mode_reference));
ir_node *args[] = { count, jclass, null };
ir_type *call_type = get_entity_type(gcj_new_object_array_entity);
ir_node *mem = get_store();
ir_node *call = new_Call(mem, addr, ARRAY_SIZE(args), args,
call_type);
ir_node *ress = new_Proj(call, mode_T, pn_Call_T_result);
new_mem = new_Proj(call, mode_M, pn_Call_M);
res = new_Proj(ress, mode_reference, 0);
}
ir_node *assure_vptr = new_VptrIsSet(new_mem, res, type_jarray);
ir_node *new_mem2 = new_Proj(assure_vptr, mode_M, pn_VptrIsSet_M);
ir_node *res2 = new_Proj(assure_vptr, mode_reference,
pn_VptrIsSet_res);
set_store(new_mem2);
return res2;
}
static const char *get_gcc_machmode(ir_type *type)
{
assert(is_Primitive_type(type));
switch (get_type_size(type)) {
case 4: return "si";
case 8: return "di";
default:
panic("couldn't determine gcc machmode for type %+F", type);
}
}
static ir_entity *emit_type_signature(ir_type *type)
{
ir_type *curtype = type;
unsigned n_pointer_levels = 0;
while (is_Pointer_type(curtype)) {
n_pointer_levels++;
curtype = get_pointer_points_to_type(curtype);
}
struct obstack obst;
obstack_init(&obst);
if (n_pointer_levels > 0) {
for (unsigned i = 0; i < n_pointer_levels-1; i++)
obstack_1grow(&obst, '[');
if (is_Primitive_type(curtype))
obstack_1grow(&obst, '[');
}
if (is_Primitive_type(curtype)) {
char c = get_prim_type_char(curtype);
obstack_1grow(&obst, c);
} else {
assert(is_Class_type(curtype));
obstack_1grow(&obst, 'L');
obstack_printf(&obst, "%s", get_compound_name(curtype));
obstack_1grow(&obst, ';');
obstack_1grow(&obst, '\0');
}
const char *sig_bytes = obstack_finish(&obst);
ir_entity *res = do_emit_utf8_const(sig_bytes, strlen(sig_bytes));
obstack_free(&obst, NULL);
return res;
}
static ir_node *gcji_get_runtime_classinfo_(ir_node *block, ir_node **mem,
ir_type *type)
{
ir_entity *rtti_entity = gcji_get_rtti_entity(type);
ir_graph *irg = get_irn_irg(block);
if (rtti_entity != NULL)
return new_r_Address(irg, rtti_entity);
/* Arrays are represented as pointer types. We extract the base type,
* get its classinfo and let gcj give the array type for that.
*
* gcj emits the type signature to the class' constant pool. During
* class linking, the reference to the utf8const is replaced by the
* reference to the appropriate class object.
*/
assert(is_Pointer_type(type));
unsigned n_pointer_levels = 0;
ir_type *eltype = type;
while (is_Pointer_type(eltype)) {
++n_pointer_levels;
eltype = get_pointer_points_to_type(eltype);
}
if (!is_Primitive_type(eltype))
--n_pointer_levels;
ir_entity *elem_cdf = gcji_get_rtti_entity(eltype);
assert(elem_cdf != NULL);
ir_node *array_class_ref = new_r_Address(irg, elem_cdf);
for (unsigned d = 0; d < n_pointer_levels; d++) {
array_class_ref = gcji_get_arrayclass(block, mem, array_class_ref);
}
return array_class_ref;
}
/**
* 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);
}
