/**
* 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);
}
/*-------------------------------------------------------------------------*/
vector_t *
order_alist (svalue_t *inlists, int listnum, Bool reuse)
/* Order the alist <inlists> and return a new vector with it. The sorting
* order is the internal order defined by alist_cmp().
*
* <inlists> is a vector of <listnum> vectors:
* <inlists> = ({ ({ keys }), ({ data1 }), ..., ({ data<listnum-1> }) })
*
* If <reuse> is true, the vectors of <inlists> are reused for the
* vectors of the result when possible, and their entries in <inlists> are
* set to T_INVALID.
*
* As a side effect, strings in the key vector are made shared, and
* destructed objects in key and data vectors are replaced by svalue 0s.
*
* This function is also called by the compiler for constant expressions.
*/
{
vector_t *outlist; /* The result vector of vectors */
vector_t *v; /* Aux vector pointer */
svalue_t *outlists; /* Next element in outlist to fill in */
ptrdiff_t * sorted; /* The vector elements in sorted order */
svalue_t *inpnt; /* Pointer to the value to copy into the result */
mp_int keynum; /* Number of keys */
int i, j;
keynum = (mp_int)VEC_SIZE(inlists[0].u.vec);
/* Get the sorting order */
sorted = get_array_order(inlists[0].u.vec);
/* Generate the result vectors from the sorting order.
*/
outlist = allocate_array(listnum);
outlists = outlist->item;
/* Copy the elements from all inlist vectors into the outlist
* vectors.
*
* At the beginning of every loop v points to the vector to
* use as the next 'out' vector. It may be a re-used 'in' vector
* from the previous run.
*/
v = allocate_array(keynum);
for (i = listnum; --i >= 0; ) {
svalue_t *outpnt; /* Next result value element to fill in */
/* Set the new array v as the next 'out' vector, and init outpnt
* and offs.
*/
put_array(outlists + i, v);
outpnt = v->item;
v = inlists[i].u.vec; /* Next vector to fill if reusable */
/* Copy the elements.
* For a reusable 'in' vector, a simple memory copy is sufficient.
* For a new vector, a full assignment is due to keep the refcounters
* happy.
*/
if (reuse && inlists[i].u.vec->ref == 1) {
if (i) /* not the last iteration */
inlists[i].type = T_INVALID;
for (j = keynum; --j >= 0; ) {
inpnt = inlists[i].u.vec->item + sorted[j];
if (destructed_object_ref(inpnt))
{
free_svalue(inpnt);
put_number(outpnt, 0);
outpnt++;
} else {
*outpnt++ = *inpnt;
}
inpnt->type = T_INVALID;
}
} else {
if (i) /* Not the last iteration: get new out-vector */
v = allocate_array(keynum);
for (j = keynum; --j >= 0; ) {
inpnt = inlists[i].u.vec->item + sorted[j];
if (destructed_object_ref(inpnt))
{
put_number(outpnt, 0);
outpnt++;
} else {
assign_svalue_no_free(outpnt++, inpnt);
}
}
} /* if (reuse) */
} /* for (listnum) */
xfree(sorted);
return outlist;
} /* order_alist() */
