ir_mode *mode = config.lowered_mode;
ir_node *res;
- assert(get_irn_mode(node) == mode_b);
-
res = get_irn_link(node);
if (res != NULL)
return res;
+ assert(get_irn_mode(node) == mode_b);
+
switch (get_irn_opcode(node)) {
case iro_Phi: {
int i, arity;
in[i] = unknown;
}
new_phi = new_r_Phi(block, arity, in, mode);
+ /* FIXME This does not correctly break cycles: The Phi might not be the
+ * first in the recursion, so the caller(s) are some yet un-lowered nodes
+ * and this Phi might have them (indirectly) as operands, so they would be
+ * replaced twice. */
set_irn_link(node, new_phi);
pdeq_putr(lowered_nodes, node);
case iro_Or:
case iro_Eor: {
int i, arity;
- ir_node *copy = exact_copy(node);
+ res = exact_copy(node);
arity = get_irn_arity(node);
for (i = 0; i < arity; ++i) {
ir_node *in = get_irn_n(node, i);
ir_node *low_in = lower_node(in);
- set_irn_n(copy, i, low_in);
+ set_irn_n(res, i, low_in);
}
- set_irn_mode(copy, mode);
-
- set_irn_link(node, copy);
- pdeq_putr(lowered_nodes, node);
- return copy;
+ set_irn_mode(res, mode);
+ break;
}
+
case iro_Not: {
ir_node *op = get_Not_op(node);
ir_node *low_op = lower_node(op);
res = create_not(dbgi, low_op);
- set_irn_link(node, res);
- pdeq_putr(lowered_nodes, node);
- return res;
+ break;
}
+
case iro_Mux: {
ir_node *cond = get_Mux_sel(node);
ir_node *low_cond = lower_node(cond);
ir_node *and0 = new_rd_And(dbgi, block, low_cond, low_v_true, mode);
ir_node *not_cond = create_not(dbgi, low_cond);
ir_node *and1 = new_rd_And(dbgi, block, not_cond, low_v_false, mode);
- ir_node *or = new_rd_Or(dbgi, block, and0, and1, mode);
-
- set_irn_link(node, or);
- pdeq_putr(lowered_nodes, node);
- return or;
+ res = new_rd_Or(dbgi, block, and0, and1, mode);
+ break;
}
+
case iro_Conv: {
ir_node *pred = get_Conv_op(node);
ir_mode *mode = get_irn_mode(pred);
tarval *tv_zeroc = get_tarval_null(mode);
ir_node *zero_cmp = new_d_Const(dbgi, tv_zeroc);
- ir_node *set;
ir_node *cmp = new_rd_Cmp(dbgi, block, pred, zero_cmp);
ir_node *proj = new_rd_Proj(dbgi, block, cmp, mode_b, pn_Cmp_Lg);
- set = create_set(proj);
-
- set_irn_link(node, set);
- pdeq_putr(lowered_nodes, node);
- return set;
+ res = create_set(proj);
+ break;
}
+
case iro_Proj: {
ir_node *pred = get_Proj_pred(node);
ir_node *left = get_Cmp_left(pred);
ir_node *right = get_Cmp_right(pred);
ir_mode *cmp_mode = get_irn_mode(left);
- ir_node *set;
- if ((mode_is_int(cmp_mode) || mode_is_reference(cmp_mode)) && (
- get_mode_size_bits(cmp_mode) < get_mode_size_bits(mode) ||
- (mode_is_signed(cmp_mode) && is_Const(right) && is_Const_null(right))
- )) {
+ if ((mode_is_int(cmp_mode) || mode_is_reference(cmp_mode)) &&
+ (get_mode_size_bits(cmp_mode) < get_mode_size_bits(mode) ||
+ (mode_is_signed(cmp_mode) && is_Const(right) && is_Const_null(right)))) {
int pnc = get_Proj_proj(node);
int need_not = 0;
ir_node *a = NULL;
ir_node *b = NULL;
+ int bits;
+ tarval *tv;
+ ir_node *shift_cnt;
if (pnc == pn_Cmp_Lt) {
/* a < b -> (a - b) >> 31 */
a = left;
b = right;
need_not = 1;
+ } else {
+ goto synth_zero_one;
}
- if (a != NULL) {
- int bits = get_mode_size_bits(mode);
- tarval *tv = new_tarval_from_long(bits-1, mode_Iu);
- ir_node *shift_cnt = new_d_Const(dbgi, tv);
-
- if (cmp_mode != mode) {
- a = new_rd_Conv(dbgi, block, a, mode);
- b = new_rd_Conv(dbgi, block, b, mode);
- }
-
- res = new_rd_Sub(dbgi, block, a, b, mode);
- if (need_not) {
- res = new_rd_Not(dbgi, block, res, mode);
- }
- res = new_rd_Shr(dbgi, block, res, shift_cnt, mode);
-
- set_irn_link(node, res);
- pdeq_putr(lowered_nodes, node);
- return res;
+ bits = get_mode_size_bits(mode);
+ tv = new_tarval_from_long(bits-1, mode_Iu);
+ shift_cnt = new_d_Const(dbgi, tv);
+
+ if (cmp_mode != mode) {
+ a = new_rd_Conv(dbgi, block, a, mode);
+ b = new_rd_Conv(dbgi, block, b, mode);
}
- }
- /* synthesize the 0/1 value */
- set = create_set(node);
- set_irn_link(node, set);
- pdeq_putr(lowered_nodes, node);
- return set;
+ res = new_rd_Sub(dbgi, block, a, b, mode);
+ if (need_not) {
+ res = new_rd_Not(dbgi, block, res, mode);
+ }
+ res = new_rd_Shr(dbgi, block, res, shift_cnt, mode);
+ } else {
+ /* synthesize the 0/1 value */
+synth_zero_one:
+ res = create_set(node);
+ }
} else if (is_Proj(pred) && is_Call(get_Proj_pred(pred))) {
ir_type *type = get_Call_type(get_Proj_pred(pred));
adjust_method_type(type);
set_irn_mode(node, mode);
- return node;
+ res = node;
+ goto own_replacement;
} else if (is_Proj(pred) && is_Start(get_Proj_pred(pred))) {
ir_entity *entity = get_irg_entity(current_ir_graph);
ir_type *type = get_entity_type(entity);
adjust_method_type(type);
set_irn_mode(node, mode);
- return node;
+ res = node;
+ goto own_replacement;
+ } else {
+ panic("unexpected projb: %+F (pred: %+F)", node, pred);
}
-
- panic("unexpected projb: %+F (pred: %+F)", node, pred);
+ break;
}
+
case iro_Const: {
tarval *tv = get_Const_tarval(node);
if (tv == get_tarval_b_true()) {
} else {
panic("invalid boolean const %+F", node);
}
- set_irn_link(node, res);
- pdeq_putr(lowered_nodes, node);
- return res;
+ break;
}
+
case iro_Unknown:
- return new_Unknown(mode);
+ res = new_Unknown(mode);
+ break;
+
default:
panic("didn't expect %+F to have mode_b", node);
}
+
+ pdeq_putr(lowered_nodes, node);
+own_replacement:
+ set_irn_link(node, res);
+ return res;
}
static void lower_mode_b_walker(ir_node *node, void *env)
projects / libfirm / blobdiff