+/** Constructor for a SymConst node.
+ *
+ * Adds the node to the block in current_ir_block.
+ * This is the constructor for a symbolic constant.
+ * There are four kinds of symbolic constants:
+ * -# type_tag The symbolic constant represents a type tag. The type the
+ * tag stands for is given explicitly.
+ * -# size The symbolic constant represents the size of a type. The
+ * type of which the constant represents the size is given
+ * explicitly.
+ * -# align The symbolic constant represents the alignment of a type. The
+ * type of which the constant represents the size is given
+ * explicitly.
+ * -# addr_name The symbolic constant represents the address of an entity
+ * (variable or method). The variable is indicated by a name
+ * that is valid for linking.
+ * -# addr_ent The symbolic constant represents the address of an entity
+ * (variable or method). The variable is given explicitly by
+ * a firm entity.
+ *
+ * Inputs to the node:
+ * No inputs except the block it belongs to.
+ * Outputs of the node.
+ * An unsigned integer (I_u) or a pointer (P).
+ *
+ * @param value A type or a ident depending on the SymConst kind.
+ * @param kind The kind of the symbolic constant: symconst_type_tag, symconst_type_size
+ * symconst_type_align, symconst_addr_name or symconst_addr_ent.
+ * @param tp The source type of the constant.
+ */
+ir_node *new_SymConst_type (union symconst_symbol value, symconst_kind kind, ir_type *tp);
+