* @file
* @brief Lower some High-level constructs, moved from the firmlower.
* @author Boris Boesler, Goetz Lindenmaier, Michael Beck
- * @version $Id$
*/
#include "config.h"
*/
static void lower_sel(ir_node *sel)
{
- ir_graph *irg = current_ir_graph;
- ir_entity *ent;
- ir_node *newn, *cnst, *index, *ptr, *bl;
- ir_tarval *tv;
- ir_mode *basemode, *mode, *mode_Int;
- ir_type *basetyp, *owner;
- dbg_info *dbg;
-
- assert(is_Sel(sel));
-
- /* Do not lower frame type/global offset table access: must be lowered by the backend. */
- ptr = get_Sel_ptr(sel);
- if (ptr == get_irg_frame(current_ir_graph))
+ 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;
- ent = get_Sel_entity(sel);
- owner = get_entity_owner(ent);
-
- /*
- * Cannot handle value param entities or frame type entities here.
- * Must be lowered by the backend.
- */
- if (is_value_param_type(owner) || is_frame_type(owner))
- return;
-
- dbg = get_irn_dbg_info(sel);
- mode = get_irn_mode(sel);
-
- mode_Int = get_reference_mode_signed_eq(mode);
-
- assert(get_type_state(get_entity_owner(ent)) == layout_fixed);
- assert(get_type_state(get_entity_type(ent)) == layout_fixed);
-
- bl = get_nodes_block(sel);
if (0 < get_Sel_n_indexs(sel)) {
/* an Array access */
- basetyp = get_entity_type(ent);
+ ir_type *basetyp = get_entity_type(ent);
+ ir_mode *basemode;
+ ir_node *index;
if (is_Primitive_type(basetyp))
basemode = get_type_mode(basetyp);
else
if (is_Array_type(owner)) {
ir_type *arr_ty = owner;
- int dims = get_array_n_dimensions(arr_ty);
- int *map = ALLOCAN(int, dims);
+ 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;
- int i;
+ size_t i;
- assert(dims == get_Sel_n_indexs(sel)
+ 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++) {
- int order = get_array_order(arr_ty, i);
+ size_t order = get_array_order(arr_ty, i);
assert(order < dims &&
"order of a dimension must be smaller than the arrays dim");
* whereas u_i is the upper bound of the current dimension
* and l_i the lower bound of the current dimension.
*/
- for (i = dims - 1; i >= 0; i--) {
- int dim = map[i];
+ 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);
- assert(irg == current_ir_graph);
if (! is_Unknown(lb))
lb = new_rd_Conv(dbg, bl, copy_const_value(get_irn_dbg_info(sel), lb, bl), mode_Int);
else
/*
* 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);
idx_mode),
mode);
}
- } else if (is_Method_type(get_entity_type(ent)) &&
- is_Class_type(owner) &&
- (owner != get_glob_type()) &&
- (!is_frame_type(owner))) {
- ir_node *add;
- ir_mode *ent_mode = get_type_mode(get_entity_type(ent));
-
- /* We need an additional load when accessing methods from a dispatch table. */
- tv = new_tarval_from_long(get_entity_offset(ent), mode_Int);
- cnst = new_rd_Const(dbg, irg, tv);
- add = new_rd_Add(dbg, bl, get_Sel_ptr(sel), cnst, mode);
- newn = new_rd_Load(dbg, bl, get_Sel_mem(sel), add, ent_mode, cons_none);
+ } 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 if (get_entity_owner(ent) != get_glob_type()) {
- int offset;
+ } else {
+ int offset = get_entity_offset(ent);
/* replace Sel by add(obj, const(ent.offset)) */
- newn = get_Sel_ptr(sel);
- offset = get_entity_offset(ent);
+ newn = get_Sel_ptr(sel);
if (offset != 0) {
- ir_mode *mode_UInt = get_reference_mode_unsigned_eq(mode);
-
- tv = new_tarval_from_long(offset, mode_UInt);
- cnst = new_r_Const(irg, tv);
+ 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);
}
- } else {
- /* global_type */
- newn = new_rd_SymConst_addr_ent(NULL, irg, mode, ent);
}
/* run the hooks */
hook_lower(sel);
exchange(sel, newn);
-} /* lower_sel */
+}
/**
* Lower a all possible SymConst nodes.
ir_graph *irg;
switch (get_SymConst_kind(symc)) {
- case symconst_type_tag:
- assert(!"SymConst kind symconst_type_tag not implemented");
- break;
case symconst_type_size:
/* rewrite the SymConst node by a Const node */
irg = get_irn_irg(symc);
assert(!"unknown SymConst kind");
break;
}
-} /* lower_symconst */
-
-/**
- * Checks, whether a size is an integral size
- *
- * @param size the size on bits
- */
-static int is_integral_size(int size)
-{
- /* must be a 2^n */
- if (size & (size-1))
- return 0;
- /* must be at least byte size */
- return size >= 8;
-} /* is_integral_size */
-
-/**
- * lower bitfield load access.
- *
- * @param proj the Proj(result) node
- * @param load the Load node
- */
-static void lower_bitfields_loads(ir_node *proj, ir_node *load)
-{
- ir_node *sel = get_Load_ptr(load);
- ir_node *block, *n_proj, *res, *ptr;
- ir_graph *irg;
- ir_entity *ent;
- ir_type *bf_type;
- ir_mode *bf_mode, *mode;
- int offset, bit_offset, bits, bf_bits, old_cse;
- dbg_info *db;
-
- if (!is_Sel(sel))
- return;
-
- ent = get_Sel_entity(sel);
- bf_type = get_entity_type(ent);
-
- /* must be a bitfield type */
- if (!is_Primitive_type(bf_type) || get_primitive_base_type(bf_type) == NULL)
- return;
-
- /* We have a bitfield access, if either a bit offset is given, or
- the size is not integral. */
- bf_mode = get_type_mode(bf_type);
- if (! bf_mode)
- return;
-
- mode = get_irn_mode(proj);
- block = get_nodes_block(proj);
- bf_bits = get_mode_size_bits(bf_mode);
- bit_offset = get_entity_offset_bits_remainder(ent);
-
- if (bit_offset == 0 && is_integral_size(bf_bits) && bf_mode == get_Load_mode(load))
- return;
-
- bits = get_mode_size_bits(mode);
- offset = get_entity_offset(ent);
-
- /*
- * ok, here we are: now convert the Proj_mode_bf(Load) into And(Shr(Proj_mode(Load)) for unsigned
- * and Shr(Shl(Proj_mode(load)) for signed
- */
-
- /* abandon bitfield sel */
- irg = get_irn_irg(sel);
- ptr = get_Sel_ptr(sel);
- db = get_irn_dbg_info(sel);
- ptr = new_rd_Add(db, block, ptr, new_r_Const_long(irg, mode_Is, offset), get_irn_mode(ptr));
-
- set_Load_ptr(load, ptr);
- set_Load_mode(load, mode);
-
-
- /* create new proj, switch off CSE or we may get the old one back */
- old_cse = get_opt_cse();
- set_opt_cse(0);
- res = n_proj = new_r_Proj(load, mode, pn_Load_res);
- set_opt_cse(old_cse);
-
- if (mode_is_signed(mode)) { /* signed */
- int shift_count_up = bits - (bf_bits + bit_offset);
- int shift_count_down = bits - bf_bits;
-
- if (shift_count_up) {
- res = new_r_Shl(block, res, new_r_Const_long(irg, mode_Iu, shift_count_up), mode);
- }
- if (shift_count_down) {
- res = new_r_Shrs(block, res, new_r_Const_long(irg, mode_Iu, shift_count_down), mode);
- }
- } else { /* unsigned */
- int shift_count_down = bit_offset;
- unsigned mask = ((unsigned)-1) >> (bits - bf_bits);
-
- if (shift_count_down) {
- res = new_r_Shr(block, res, new_r_Const_long(irg, mode_Iu, shift_count_down), mode);
- }
- if (bits != bf_bits) {
- res = new_r_And(block, res, new_r_Const_long(irg, mode, mask), mode);
- }
- }
-
- exchange(proj, res);
-} /* lower_bitfields_loads */
-
-/**
- * lower bitfield store access.
- *
- * @todo: It adds a load which may produce an exception!
- */
-static void lower_bitfields_stores(ir_node *store)
-{
- ir_node *sel = get_Store_ptr(store);
- ir_node *ptr, *value;
- ir_entity *ent;
- ir_type *bf_type;
- ir_mode *bf_mode, *mode;
- ir_node *mem, *irn, *block;
- ir_graph *irg;
- unsigned mask, neg_mask;
- int bf_bits, bits_mask, offset, bit_offset;
- dbg_info *db;
-
- /* check bitfield access */
- if (!is_Sel(sel))
- return;
-
- ent = get_Sel_entity(sel);
- bf_type = get_entity_type(ent);
-
- /* must be a bitfield type */
- if (!is_Primitive_type(bf_type) || get_primitive_base_type(bf_type) == NULL)
- return;
-
- /* We have a bitfield access, if either a bit offset is given, or
- the size is not integral. */
- bf_mode = get_type_mode(bf_type);
- if (! bf_mode)
- return;
-
- value = get_Store_value(store);
- mode = get_irn_mode(value);
- block = get_nodes_block(store);
-
- bf_bits = get_mode_size_bits(bf_mode);
- bit_offset = get_entity_offset_bits_remainder(ent);
-
- if (bit_offset == 0 && is_integral_size(bf_bits) && bf_mode == get_irn_mode(value))
- return;
-
- /*
- * ok, here we are: now convert the Store(Sel(), value) into Or(And(Load(Sel),c), And(Value,c))
- */
- mem = get_Store_mem(store);
- offset = get_entity_offset(ent);
-
- bits_mask = get_mode_size_bits(mode) - bf_bits;
- mask = ((unsigned)-1) >> bits_mask;
- mask <<= bit_offset;
- neg_mask = ~mask;
-
- /* abandon bitfield sel */
- irg = get_irn_irg(sel);
- ptr = get_Sel_ptr(sel);
- db = get_irn_dbg_info(sel);
- ptr = new_rd_Add(db, block, ptr, new_r_Const_long(irg, mode_Is, offset), get_irn_mode(ptr));
-
- if (neg_mask) {
- /* there are some bits, normal case */
- irn = new_r_Load(block, mem, ptr, mode, cons_none);
- mem = new_r_Proj(irn, mode_M, pn_Load_M);
- irn = new_r_Proj(irn, mode, pn_Load_res);
-
- irn = new_r_And(block, irn, new_r_Const_long(irg, mode, neg_mask), mode);
-
- if (bit_offset > 0) {
- value = new_r_Shl(block, value, new_r_Const_long(irg, mode_Iu, bit_offset), mode);
- }
-
- value = new_r_And(block, value, new_r_Const_long(irg, mode, mask), mode);
-
- value = new_r_Or(block, value, irn, mode);
- }
-
- set_Store_mem(store, mem);
- set_Store_value(store, value);
- set_Store_ptr(store, ptr);
-} /* lower_bitfields_stores */
+}
/**
* lowers IR-nodes, called from walker
case iro_SymConst:
lower_symconst(irn);
break;
- case iro_Cast:
- exchange(irn, get_Cast_op(irn));
- break;
- default:
- break;
- }
-}
-
-/**
- * Walker: lowers IR-nodes for bitfield access
- */
-static void lower_bf_access(ir_node *irn, void *env)
-{
- (void) env;
- switch (get_irn_opcode(irn)) {
- case iro_Proj:
- {
- long proj = get_Proj_proj(irn);
- ir_node *pred = get_Proj_pred(irn);
-
- if (proj == pn_Load_res && is_Load(pred))
- lower_bitfields_loads(irn, pred);
- break;
- }
- case iro_Store:
- lower_bitfields_stores(irn);
- break;
-
default:
break;
}
* Replace Sel nodes by address computation. Also resolves array access.
* Handle Bitfields by added And/Or calculations.
*/
-void lower_highlevel_graph(ir_graph *irg, int lower_bitfields)
+void lower_highlevel_graph(ir_graph *irg)
{
- if (lower_bitfields) {
- /* First step: lower bitfield access: must be run as long as Sels still
- * exists. */
- irg_walk_graph(irg, NULL, lower_bf_access, NULL);
- }
-
- /* Finally: lower SymConst-Size and Sel nodes, Casts, unaligned Load/Stores. */
+ /* Finally: lower SymConst-Size and Sel nodes, unaligned Load/Stores. */
irg_walk_graph(irg, NULL, lower_irnode, NULL);
-
- set_irg_outs_inconsistent(irg);
}
typedef struct pass_t {
ir_graph_pass_t pass;
- int lower_bitfields;
} pass_t;
/**
*/
static int lower_highlevel_graph_wrapper(ir_graph *irg, void *context)
{
- pass_t *pass = (pass_t*)context;
+ (void)context;
- lower_highlevel_graph(irg, pass->lower_bitfields);
+ lower_highlevel_graph(irg);
return 0;
-} /* lower_highlevel_graph_wrapper */
+}
-ir_graph_pass_t *lower_highlevel_graph_pass(const char *name, int lower_bitfields)
+ir_graph_pass_t *lower_highlevel_graph_pass(const char *name)
{
pass_t *pass = XMALLOCZ(pass_t);
- pass->lower_bitfields = lower_bitfields;
return def_graph_pass_constructor(
&pass->pass, name ? name : "lower_hl", lower_highlevel_graph_wrapper);
-} /* lower_highlevel_graph_pass */
+}
/*
* does the same as lower_highlevel() for all nodes on the const code irg
void lower_const_code(void)
{
walk_const_code(NULL, lower_irnode, NULL);
-} /* lower_const_code */
+}
ir_prog_pass_t *lower_const_code_pass(const char *name)
{
* Replace Sel nodes by address computation. Also resolves array access.
* Handle Bitfields by added And/Or calculations.
*/
-void lower_highlevel(int lower_bitfields)
+void lower_highlevel()
{
size_t i, n;
n = get_irp_n_irgs();
for (i = 0; i < n; ++i) {
ir_graph *irg = get_irp_irg(i);
- lower_highlevel_graph(irg, lower_bitfields);
+ lower_highlevel_graph(irg);
}
lower_const_code();
-} /* lower_highlevel */
+}
projects / libfirm / blobdiff