+/**
+ * Apply an evaluator on a binop with a constant operators (and one Phi).
+ *
+ * @param phi the Phi node
+ * @param other the other operand
+ * @param eval an evaluator function
+ * @param left if non-zero, other is the left operand, else the right
+ *
+ * @return a new Phi node if the conversion was successful, NULL else
+ */
+static ir_node *apply_binop_on_phi(ir_node *phi, tarval *other, tarval *(*eval)(tarval *, tarval *), int left) {
+ tarval *tv;
+ void **res;
+ ir_node *pred;
+ ir_mode *mode;
+ ir_graph *irg;
+ int i, n = get_irn_arity(phi);
+
+ NEW_ARR_A(void *, res, n);
+ if (left) {
+ for (i = 0; i < n; ++i) {
+ pred = get_irn_n(phi, i);
+ tv = get_Const_tarval(pred);
+ tv = eval(other, tv);
+
+ if (tv == tarval_bad) {
+ /* folding failed, bad */
+ return NULL;
+ }
+ res[i] = tv;
+ }
+ }
+ else {
+ for (i = 0; i < n; ++i) {
+ pred = get_irn_n(phi, i);
+ tv = get_Const_tarval(pred);
+ tv = eval(tv, other);
+
+ if (tv == tarval_bad) {
+ /* folding failed, bad */
+ return 0;
+ }
+ res[i] = tv;
+ }
+ }
+ mode = get_irn_mode(phi);
+ irg = current_ir_graph;
+ for (i = 0; i < n; ++i) {
+ pred = get_irn_n(phi, i);
+ res[i] = new_r_Const_type(irg, get_nodes_block(pred),
+ mode, res[i], get_Const_type(pred));
+ }
+ return new_r_Phi(irg, get_nodes_block(phi), n, (ir_node **)res, mode);
+}
+
+/**
+ * Apply an evaluator on a unop with a constant operator (a Phi).
+ *
+ * @param phi the Phi node
+ * @param eval an evaluator function
+ *
+ * @return a new Phi node if the conversion was successful, NULL else
+ */
+static ir_node *apply_unop_on_phi(ir_node *phi, tarval *(*eval)(tarval *)) {
+ tarval *tv;
+ void **res;
+ ir_node *pred;
+ ir_mode *mode;
+ ir_graph *irg;
+ int i, n = get_irn_arity(phi);
+
+ NEW_ARR_A(void *, res, n);
+ for (i = 0; i < n; ++i) {
+ pred = get_irn_n(phi, i);
+ tv = get_Const_tarval(pred);
+ tv = eval(tv);
+
+ if (tv == tarval_bad) {
+ /* folding failed, bad */
+ return 0;
+ }
+ res[i] = tv;
+ }
+ mode = get_irn_mode(phi);
+ irg = current_ir_graph;
+ for (i = 0; i < n; ++i) {
+ pred = get_irn_n(phi, i);
+ res[i] = new_r_Const_type(irg, get_nodes_block(pred),
+ mode, res[i], get_Const_type(pred));
+ }
+ return new_r_Phi(irg, get_nodes_block(phi), n, (ir_node **)res, mode);
+}
+