+/**
+ * @file ircons.h
+ *
+ * documentation no more supported since 2001
+ *
+ * ir node construction.
+ *
+ * @author Martin Trapp, Christian Schaefer, Goetz Lindenmaier
+ *
+ * This file documents all datatypes and constructors needed to
+ * build a FIRM representation of a procedure. The constructors are
+ * also implemented in this file.
+ *
+ * The documentation also gives a short manual how to use the library.
+ *
+ * For extensive documentation of FIRM see UKA Techreport 1999-14.
+ *
+ *
+ * Three kinds of nodes
+ * --------------------
+ *
+ * There are three kinds of nodes known to the ir: entities,
+ * types, and ir_nodes
+ *
+ * + ir_nodes are the actual nodes of the FIRM intermediate representation.
+ * They represent operations on the data of the program and control flow
+ * operations.
+ *
+ * + entity ==> implemented in entity.h
+ * Refers to a single entity of the compiled program, e.g. a field of a
+ * class or a method. If a method or variable can not be assigned to
+ * a method or class or the like, it is a global object.
+ *
+ * + types ==> implemented in type.h
+ * With types type information is represented. There are several type
+ * nodes.
+ *
+ * Implementation of the FIRM operations: ir_node
+ * ----------------------------------------------
+ *
+ * Ir_nodes represent operations on the data of the program and control flow
+ * operations. Examples of ir_nodes: Add, Jmp, Cmp
+ *
+ * FIRM is a dataflow graph. A dataflow graph is a directed graph,
+ * so that every node has incoming and outgoing edges. A node is
+ * executable if every input at it's incoming edges is available.
+ * Execution of the dataflow graph is started at the Start node which
+ * has no incoming edges and ends when the End node executes, even if
+ * there are still executable or not executed nodes. (Is this true,
+ * or must all executable nodes be executed?) (There are exceptions
+ * to the dataflow paradigma that all inputs have to be available
+ * before a node can execute: Phi, Block. See UKA Techreport
+ * 1999-14.)
+ *
+ * The implementation of FIRM differs from the view as a dataflow
+ * graph. To allow fast traversion of the graph edges are
+ * implemented as C-pointers. Inputs to nodes are not ambiguous, the
+ * results can be used by several other nodes. Each input can be
+ * implemented as a single pointer to a predecessor node, outputs
+ * need to be lists of pointers to successors. Therefore a node
+ * contains pointers to it's predecessor so that the implementation is a
+ * dataflow graph with reversed edges. It has to be traversed bottom
+ * up.
+ *
+ * All nodes of the ir have the same basic structure. They are
+ * distinguished by a field containing the opcode.
+ *
+ * The fields of an ir_node:
+ *
+ * kind A firm_kind tag containing k_ir_node. This is useful for
+ * dynamically checking the type of a node.
+ *
+ * *op This ir_op gives the opcode as a tag and a string
+ * and the number of attributes of an ir_node. There is
+ * one statically allocated struct ir_op for each opcode.
+ *
+ * *mode The ir_mode of the operation represented by this firm
+ * node. The mode of the operation is the mode of it's
+ * result. A Firm mode is a datatype as known to the target,
+ * not a type of the source language.
+ *
+ * visit A flag for traversing the ir.
+ *
+ * **in An array with pointers to the node's predecessors.
+ *
+ * *link A pointer to an ir_node. With this pointer all Phi nodes
+ * are attached to a Block, i.e., a Block points to it's
+ * first Phi node, this node points to the second Phi node
+ * in the Block and so fourth. Used in mature_immBlock
+ * to find all Phi nodes to be matured. It's also used to
+ * annotate a node with a better, optimized version of it.
+ *
+ * attr An attr struct containing the attributes of the nodes. The
+ * attributes depend on the opcode of the node. The number
+ * of these attributes is given in op.
+ *
+ * The struct ir_op
+ * ----------------
+ * Not yet documented. See irop.h.
+ *
+ * The struct ir_mode
+ * ------------------
+ * Not yet documented. See irmode.h.
+ *
+ * GLOBAL VARIABLES -- now also fields of ir_graph.
+ * ================
+ *
+ * current_ir_graph Points to the current ir_graph. All constructors for
+ * nodes add nodes to this graph.
+ *
+ * ir_visited An int used as flag to traverse the ir_graph.
+ *
+ * block_visited An int used as a flag to traverse block nodes in the
+ * graph.
+ *
+ * Others not yet documented.
+ *
+ *
+ *
+ * CONSTRUCTOR FOR IR_GRAPH --> see irgraph.h
+ * ========================
+ *
+ *
+ * PROCEDURE TO CONSTRUCT AN IR GRAPH --> see also Firm tutorial
+ * ==================================
+ *
+ * This library supplies several interfaces to construct a FIRM graph for
+ * a program:
+ * - A "comfortable" interface generating SSA automatically. Automatically
+ * computed predecessors of nodes need not be specified in the constructors.
+ * (new_<Node> constructurs and a set of additional routines.)
+ * - A less comfortable interface where all predecessors except the block
+ * an operation belongs to need to be specified. SSA must be constructed
+ * by hand. (new_<Node> constructors and set_cur_block()). This interface
+ * is called "block oriented". It automatically calles the local optimizations
+ * for each new node.
+ * - An even less comfortable interface where the block needs to be specified
+ * explicitly. This is called the "raw" interface. (new_r_<Node>
+ * constructors). These nodes are not optimized.
+ *
+ * To use the functionality of the comfortable interface correctly the Front
+ * End needs to follow certain protocols. This is explained in the following.
+ * To build a correct IR with the other interfaces study the semantics of
+ * the firm node (See tech-reprot UKA 1999-14). For the construction of
+ * types and entities see the documentation in those modules.
+ *
+ * First the Frontend needs to decide which variables and values used in
+ * a procedure can be represented by dataflow edges. These are variables
+ * that need not be saved to memory as they cause no side effects visible
+ * out of the procedure. Often these are all compiler generated
+ * variables and simple local variables of the procedure as integers,
+ * reals and pointers. The frontend has to count and number these variables.
+ *
+ * First an ir_graph needs to be constructed with new_ir_graph. The
+ * constructor gets the number of local variables. The graph is hold in the
+ * global variable irg.
+ *
+ * Now the construction of the procedure can start. Several basic blocks can
+ * be constructed in parallel, but the code within each block needs to
+ * be constructed (almost) in program order.
+ *
+ * A global variable holds the current basic block. All (non block) nodes
+ * generated are added to this block. The current block can be set with
+ * set_cur_block(block). If several blocks are constructed in parallel block
+ * switches need to be performed constantly.
+ *
+ * To generate a Block node (with the comfortable interface) it's predecessor
+ * control flow nodes need not be known. In case of cyclic control flow these
+ * can not be known when the block is constructed. With add_immBlock_pred(block,
+ * cfnode) predecessors can be added to the block. If all predecessors are
+ * added to the block mature_immBlock(b) needs to be called. Calling mature_immBlock
+ * early improves the efficiency of the Phi node construction algorithm.
+ * But if several blocks are constructed at once, mature_immBlock must only
+ * be called after performing all set_values and set_stores in the block!
+ * (See documentation of new_immBlock constructor.)
+ *
+ * The constructors of arithmetic nodes require that their predecessors
+ * are mentioned. Sometimes these are available in the Frontend as the
+ * predecessors have just been generated by the frontend. If they are local
+ * values the predecessors can be obtained from the library with a call to
+ * get_value(local_val_nr). (local_val_nr needs to be administered by
+ * the Frontend.) A call to get_value triggers the generation of Phi nodes.
+ * If an arithmetic operation produces a local value this value needs to be
+ * passed to the library by set_value(node, local_val_nr).
+ * In straight line code these two operations just remember and return the
+ * pointer to nodes producing the value. If the value passes block boundaries
+ * Phi nodes can be inserted.
+ * Similar routines exist to manage the Memory operands: set_store and
+ * get_store.
+ *
+ * Several nodes produce more than one result. An example is the Div node.
+ * Such nodes return tuples of values. From these individual values can be
+ * extracted by proj nodes.
+ *
+ * The following example illustrates the construction of a simple basic block
+ * with two predecessors stored in variables cf_pred1 and cf_pred2, containing
+ * the code
+ * a = a div a;
+ * and finally jumping to an other block. The variable a got the local_val_nr
+ * 42 by the frontend.
+ *
+ * ir_node *this_block, *cf_pred1, *cf_pred2, *a_val, *mem, *div, *res, *cf_op;
+ *
+ * this_block = new_immBlock();
+ * add_immBlock_pred(this_block, cf_pred1);
+ * add_immBlock_pred(this_block, cf_pred2);
+ * mature_immBlock(this_block);
+ * a_val = get_value(42, mode_Iu);
+ * mem = get_store();
+ * div = new_Div(mem, a_val, a_val);
+ * mem = new_Proj(div, mode_M, 0); * for the numbers for Proj see docu *
+ * res = new_Proj(div, mode_Iu, 2);
+ * set_store(mem);
+ * set_value(res, 42);
+ * cf_op = new_Jmp();
+ *
+ * For further information look at the documentation of the nodes and
+ * constructors and at the paragraph COPING WITH DATA OBJECTS at the
+ * end of this documentation.
+ *
+ * The comfortable interface contains the following routines further explained
+ * below:
+ *
+ * ir_node *new_immBlock (void);
+ * ir_node *new_Start (void);
+ * ir_node *new_End (void);
+ * ir_node *new_Jmp (void);
+ * ir_node *new_IJmp (ir_node *tgt);
+ * ir_node *new_Cond (ir_node *c);
+ * ir_node *new_Return (ir_node *store, int arity, ir_node **in);
+ * ir_node *new_Const (ir_mode *mode, tarval *con);
+ * ir_node *new_SymConst (symconst_symbol value, symconst_kind kind);
+ * ir_node *new_simpleSel (ir_node *store, ir_node *objptr, entity *ent);
+ * ir_node *new_Sel (ir_node *store, ir_node *objptr, int arity,
+ * ir_node **in, entity *ent);
+ * ir_node *new_Call (ir_node *store, ir_node *callee, int arity,
+ * ir_node **in, type_method *type);
+ * ir_node *new_Add (ir_node *op1, ir_node *op2, ir_mode *mode);
+ * ir_node *new_Sub (ir_node *op1, ir_node *op2, ir_mode *mode);
+ * ir_node *new_Minus (ir_node *op, ir_mode *mode);
+ * ir_node *new_Mul (ir_node *op1, ir_node *op2, ir_mode *mode);
+ * ir_node *new_Quot (ir_node *memop, ir_node *op1, ir_node *op2);
+ * ir_node *new_DivMod (ir_node *memop, ir_node *op1, ir_node *op2);
+ * ir_node *new_Div (ir_node *memop, ir_node *op1, ir_node *op2);
+ * ir_node *new_Mod (ir_node *memop, ir_node *op1, ir_node *op2);
+ * ir_node *new_Abs (ir_node *op, ir_mode *mode);
+ * ir_node *new_And (ir_node *op1, ir_node *op2, ir_mode *mode);
+ * ir_node *new_Or (ir_node *op1, ir_node *op2, ir_mode *mode);
+ * ir_node *new_Eor (ir_node *op1, ir_node *op2, ir_mode *mode);
+ * ir_node *new_Not (ir_node *op, ir_mode *mode);
+ * ir_node *new_Shl (ir_node *op, ir_node *k, ir_mode *mode);
+ * ir_node *new_Shr (ir_node *op, ir_node *k, ir_mode *mode);
+ * ir_node *new_Shrs (ir_node *op, ir_node *k, ir_mode *mode);
+ * ir_node *new_Rot (ir_node *op, ir_node *k, ir_mode *mode);
+ * ir_node *new_Cmp (ir_node *op1, ir_node *op2);
+ * ir_node *new_Conv (ir_node *op, ir_mode *mode);
+ * ir_node *new_Cast (ir_node *op, ir_type *to_tp);
+ * ir_node *new_Carry (ir_node *op1, ir_node *op2, ir_mode *mode);
+ * ir_node *new_Borrow (ir_node *op1, ir_node *op2, ir_mode *mode);
+ * ir_node *new_Load (ir_node *store, ir_node *addr, ir_mode *mode);
+ * ir_node *new_Store (ir_node *store, ir_node *addr, ir_node *val);
+ * ir_node *new_Alloc (ir_node *store, ir_node *size, ir_type *alloc_type,
+ * where_alloc where);
+ * ir_node *new_Free (ir_node *store, ir_node *ptr, ir_node *size,
+ * ir_type *free_type, where_alloc where);
+ * ir_node *new_Proj (ir_node *arg, ir_mode *mode, long proj);
+ * ir_node *new_NoMem (void);
+ * ir_node *new_Mux (ir_node *sel, ir_node *ir_false, ir_node *ir_true, ir_mode *mode);
+ * ir_node *new_Psi (int arity, ir_node *conds[], ir_node *vals[], ir_mode *mode);
+ * ir_node *new_CopyB (ir_node *store, ir_node *dst, ir_node *src, ir_type *data_type);
+ * ir_node *new_InstOf (ir_node *store, ir_node obj, ir_type *ent);
+ * ir_node *new_Raise (ir_node *store, ir_node *obj);
+ * ir_node *new_Bound (ir_node *store, ir_node *idx, ir_node *lower, ir_node *upper);
+ *
+ * void add_immBlock_pred (ir_node *block, ir_node *jmp);
+ * void mature_immBlock (ir_node *block);
+ * void set_cur_block (ir_node *target);
+ * ir_node *get_value (int pos, ir_mode *mode);
+ * void set_value (int pos, ir_node *value);
+ * ir_node *get_store (void);
+ * void set_store (ir_node *store);
+ * keep_alive (ir_node ka)
+ *
+ * IR_NODES AND CONSTRUCTORS FOR IR_NODES
+ * =======================================
+ *
+ * All ir_nodes are defined by a common data structure. They are distinguished
+ * by their opcode and differ in the number of their attributes.
+ *
+ * The constructor for the block node sets current_block to itself.
+ * Const nodes are always added to the start block.
+ * All other constructors add the created node to the current_block.
+ * swich_block(block) allows to set the current block to block.
+ *
+ * Watch for my inconsistent use of input and predecessor (dataflow view)
+ * and `the node points to' (implementation view).
+ *
+ * The following description of the nodes lists four properties them if these
+ * are of interest:
+ * - the parameters to the constructor
+ * - the inputs of the Firm node
+ * - the outputs of the Firm node
+ * - attributes to the node
+ *
+ * ------------
+ *
+ * ir_node *new_immBlock (void)
+ * ----------------------------
+ *
+ * Creates a new block. Sets current_block to itself. When a new block is
+ * created it cannot be known how many predecessors this block will have in the
+ * control flow graph. Therefore the list of inputs can not be fixed at
+ * creation. Predecessors can be added with add_immBlock_pred (block, control flow
+ * operation). With every added predecessor the number of inputs to Phi nodes
+ * also changes.
+ *
+ * The block can be completed by mature_immBlock(block) if all predecessors are
+ * known. If several blocks are built at once, mature_immBlock can only be called
+ * after set_value has been called for all values that are life at the end
+ * of the block. This is necessary so that Phi nodes created mature_immBlock
+ * get the right predecessors in case of cyclic dependencies. If all set_values
+ * of this block are called after maturing it and before calling get_value
+ * in some block that is control flow dependent on this block, the construction
+ * is correct.
+ *
+ * Example for faulty ir construction: (draw the graph on a paper and you'll
+ * get it ;-)
+ *
+ * block_before_loop = new_block();
+ * set_value(x);
+ * mature_immBlock(block_before_loop);
+ * before2header = new_Jmp;
+ *
+ * loop_header = new_block ();
+ * header2body - new_Jmp();
+ *
+ * loop_body = new_block ();
+ * body2header = new_Jmp();
+ *
+ * add_immBlock_pred(loop_header, before2header);
+ * add_immBlock_pred(loop_header, body2header);
+ * add_immBlock_pred(loop_body, header2body);
+ *
+ * mature_immBlock(loop_header);
+ * mature_immBlock(loop_body);
+ *
+ * get_value(loop_body, x); // gets the Phi in loop_header
+ * set_value(loop_header, x); // sets the value the above get_value should
+ * // have returned!!!
+ *
+ * Mature_immBlock also fixes the number of inputs to the Phi nodes. Mature_immBlock
+ * should be called as early as possible, as afterwards the generation of Phi
+ * nodes is more efficient.
+ *
+ * Inputs:
+ * There is an input for each control flow predecessor of the block.
+ * The input points to an instruction producing an output of type X.
+ * Possible predecessors: Start, Jmp, Cond, Raise or Return or any node
+ * possibly causing an exception. (Often the real predecessors are Projs.)
+ * Output:
+ * Mode BB (R), all nodes belonging to this block should consume this output.
+ * As they are strict (except Block and Phi node) it is a necessary condition
+ * that the block node executed before any other node in this block executes.
+ * Attributes:
+ * block.matured Indicates whether the block is mature.
+ * block.**graph_arr
+ * This attribute contains all local values valid in this
+ * block. This is needed to build the Phi nodes and removed
+ * if the graph is complete. This field is used by the
+ * internal construction algorithm and should not be accessed
+ * from outside.
+ *
+ *
+ * ir_node *new_Block (int arity, ir_node **in)
+ * --------------------------------------------
+ *
+ * Creates a new Block with the given list of predecessors. This block
+ * is mature. As other constructors calls optimization and vrfy for the
+ * block. If one of the predecessors is Unknown (as it has to be filled in
+ * later) optimizations are skipped. This is necessary to
+ * construct Blocks in loops. Leaving Unknown in the Block after finishing
+ * the construction may have strange effects, especially for interprocedural
+ * representation and analysis.
+ *
+ *
+ * CONTROL FLOW OPERATIONS
+ * -----------------------
+ *
+ * In each block there must be exactly one of the control flow
+ * operations Start, End, Jmp, Cond, Return or Raise. The output of a
+ * control flow operation points to the block to be executed next.
+ *
+ * ir_node *new_Start (void)
+ * -------------------------
+ *
+ * Creates a start node. Not actually needed public. There is only one such
+ * node in each procedure which is automatically created by new_ir_graph.
+ *
+ * Inputs:
+ * No inputs except the block it belogns to.
+ * Output:
+ * A tuple of 4 (5, 6) distinct values. These are labeled by the following
+ * projection numbers (pn_Start):
+ * * pn_Start_X_initial_exec mode X, points to the first block to be exe * cuted.
+ * * pn_Start_M mode M, the global store
+ * * pn_Start_P_frame_base mode P, a pointer to the base of the proce * dures stack frame.
+ * * pn_Start_P_globals mode P, a pointer to the part of the memory * containing_all_ global things.
+ * * pn_Start_T_args mode T, a tuple containing all arguments of * the procedure.
+ *
+ *
+ * ir_node *new_End (void)
+ * -----------------------
+ *
+ * Creates an end node. Not actually needed public. There is only one such
+ * node in each procedure which is automatically created by new_ir_graph.
+ *
+ * Inputs:
+ * No inputs except the block it belongs to.
+ * Output:
+ * No output.
+ *
+ * ir_node *new_Jmp (void)
+ * -----------------------
+ *
+ * Creates a Jmp node.
+ *
+ * Inputs:
+ * The block the node belongs to
+ * Output:
+ * Control flow to the next block.
+ *
+ * ir_node *new_IJmp (ir_node *tgt)
+ * -----------------------
+ *
+ * Creates an IJmp node.
+ *
+ * Inputs:
+ * The node that represents the target jump address
+ * Output:
+ * Control flow to an unknown target, must be pinned by
+ * the End node.
+ *
+ * ir_node *new_Cond (ir_node *c)
+ * ------------------------------
+ *
+ * Creates a Cond node. There are two versions of this node.
+ *
+ * The Boolean Cond:
+ * Input:
+ * A value of mode b.
+ * Output:
+ * A tuple of two control flows. The first is taken if the input is
+ * false, the second if it is true.
+ *
+ * The Switch Cond:
+ * Input:
+ * A value of mode I_u. (i)
+ * Output:
+ * A tuple of n control flows. If the Cond's input is i, control
+ * flow will procede along output i. If the input is >= n control
+ * flow proceeds along output n.
+ *
+ * ir_node *new_Return (ir_node *store, int arity, ir_node **in)
+ * -------------------------------------------------------------
+ *
+ * The return node has as inputs the results of the procedure. It
+ * passes the control flow to the end_block.
+ *
+ * Inputs:
+ * The memory state.
+ * All results.
+ * Output
+ * Control flow to the end block.
+ *
+ * ---------
+ *
+ * ir_node *new_Const (ir_mode *mode, tarval *con)
+ * -----------------------------------------------
+ *
+ * Creates a constant in the constant table and adds a Const node
+ * returning this value to the start block.
+ *
+ * Parameters:
+ * *mode The mode of the constant.
+ * *con Points to an entry in the constant table.
+ * This pointer is added to the attributes of
+ * the node (self->attr.con)
+ * Inputs:
+ * No inputs except the block it belogns to.
+ * Output:
+ * The constant value.
+ * Attribute:
+ * attr.con A tarval* pointer to the proper entry in the constant
+ * table.
+ *
+ * ir_node *new_SymConst (union symconst_symbol value, symconst_addr_ent kind)
+ * ---------------------------------------------------------------------------
+ *
+ * There are three kinds of symbolic constants:
+ * symconst_type_tag The symbolic constant represents a type tag.
+ * symconst_size The symbolic constant represents the size of a class.
+ * symconst_addr_name Information for the linker, e.g. the name of a global
+ * variable.
+ * To represent a pointer to an entity that is represented by an entity
+ * datastructure don't use
+ * new_SymConst((type_or_id*)get_entity_ld_ident(ent), symconst_addr_name);.
+ * Use a real const instead:
+ * new_SymConst(mode_P_mach, tarval_p_from_entity(ent));
+ * This makes the Constant independent of name changes of the entity due to
+ * mangling.
+ *
+ * Parameters
+ * kind The kind of the symbolic constant: type_tag, size or link_info.
+ * *type_or_id Points to the type the tag stands for or to the type
+ * whose size is represented by the constant or to an ident
+ * representing the linkage info.
+ *
+ * Inputs:
+ * No inputs except the block it belogns to.
+ * Output:
+ * An unsigned integer (I_u) or a pointer (P).
+ *
+ * Attributes:
+ * attr.i.num The symconst_addr_ent, i.e. one of
+ * -symconst_type_tag
+ * -symconst_size
+ * - symconst_addr_name
+ * If the attr.i.num is symconst_type_tag or symconst_size, the node contains an attribute
+ * attr.i.*type, a pointer to a type_class. The mode of the node is mode_Is.
+ * if it is linkage_ptr_info it contains
+ * attr.i.*ptrinfo, an ident holding information for the linker. The mode
+ * of the node is mode_P_mach.
+ *
+ * ---------------
+ *
+ * ir_node *new_simpleSel (ir_node *store, ir_node *frame, entity *sel)
+ * --------------------------------------------------------------------
+ *
+ *
+ * Selects an entity from a compound type. This entity can be a field or
+ * a method.
+ *
+ * Parameters:
+ * *store The memory in which the object the entity should be selected
+ * from is allocated.
+ * *frame The pointer to the object.
+ * *sel The entity to select.
+ *
+ * Inputs:
+ * The memory containing the object.
+ * A pointer to the object.
+ * An unsigned integer.
+ * Output:
+ * A pointer to the selected entity.
+ * Attributes:
+ * attr.sel Pointer to the entity
+ *
+ *
+ * ir_node *new_Sel (ir_node *store, ir_node *frame, int arity, ir_node **in,
+ * --------------------------------------------------------------------------
+ * entity *sel)
+ * ------------
+ *
+ * Selects a field from an array type. The entity has as owner the array, as
+ * type the arrays element type. The indices to access an array element are
+ * given also.
+ *
+ * Parameters:
+ * *store The memory in which the object the entity should be selected from
+ * is allocated.
+ * *frame The pointer to the object.
+ * *arity number of array indices.
+ * *in array with index inputs to the node.
+ * *sel The entity to select.
+ *
+ * Inputs:
+ * The memory containing the object.
+ * A pointer to the object.
+ * As much unsigned integer as there are array expressions.
+ * Output:
+ * A pointer to the selected entity.
+ * Attributes:
+ * attr.sel Pointer to the entity
+ *
+ * The constructors new_Sel and new_simpleSel generate the same ir nodes.
+ * simpleSel just sets the arity of the index inputs to zero.
+ *
+ *
+ * ARITHMETIC OPERATIONS
+ * ---------------------
+ *
+ * ir_node *new_Call (ir_node *store, ir_node *callee, int arity, ir_node **in,
+ * ----------------------------------------------------------------------------
+ * type_method *type)
+ * ------------------
+ *
+ * Creates a procedure call.
+ *
+ * Parameters
+ * *store The actual store.
+ * *callee A pointer to the called procedure.
+ * arity The number of procedure parameters.
+ * **in An array with the pointers to the parameters.
+ * The constructor copies this array.
+ * *type Type information of the procedure called.
+ *
+ * Inputs:
+ * The store, the callee and the parameters.
+ * Output:
+ * A tuple containing the eventually changed store and the procedure
+ * results.
+ * Attributes:
+ * attr.call Contains the type information for the procedure.
+ *
+ *
+ * ir_node *new_Add (ir_node *op1, ir_node *op2, ir_mode *mode)
+ * ------------------------------------------------------------
+ *
+ * Trivial.
+ *
+ * ir_node *new_Sub (ir_node *op1, ir_node *op2, ir_mode *mode)
+ * ------------------------------------------------------------
+ *
+ * Trivial.
+ *
+ * ir_node *new_Minus (ir_node *op, ir_mode *mode)
+ * -----------------------------------------------
+ *
+ * Unary Minus operations on integer and floating point values.
+ *
+ * ir_node *new_Mul (ir_node *op1, ir_node *op2, ir_mode *mode)
+ * ------------------------------------------------------------
+ *
+ * Trivial.
+ *
+ * ir_node *new_Quot (ir_node *memop, ir_node *op1, ir_node *op2)
+ * --------------------------------------------------------------
+ *
+ * Quot performs exact division of floating point numbers. It's mode
+ * is Tuple, the mode of the result must be annotated to the Proj
+ * that extracts the result of the arithmetic operations.
+ *
+ * Inputs:
+ * The store needed to model exceptions and the two operands.
+ * Output:
+ * A tuple contaning a memory and a execution for modeling exceptions
+ * and the result of the arithmetic operation.
+ *
+ * ir_node *new_DivMod (ir_node *memop, ir_node *op1, ir_node *op2)
+ * ----------------------------------------------------------------
+ *
+ * Performs Div and Mod on interger values.
+ *
+ * Output:
+ * A tuple contaning a memory and a execution for modeling exceptions
+ * and the two result of the arithmetic operations.
+ *
+ * ir_node *new_Div (ir_node *memop, ir_node *op1, ir_node *op2)
+ * -------------------------------------------------------------
+ *
+ * Trivial.
+ *
+ * ir_node *new_Mod (ir_node *memop, ir_node *op1, ir_node *op2)
+ * -------------------------------------------------------------
+ *
+ * Trivial.
+ *
+ * ir_node *new_Abs (ir_node *op, ir_mode *mode)
+ * ---------------------------------------------
+ *
+ * Trivial.
+ *
+ * ir_node *new_And (ir_node *op1, ir_node *op2, ir_mode *mode)
+ * ------------------------------------------------------------
+ *
+ * Trivial.
+ *
+ * ir_node *new_Or (ir_node *op1, ir_node *op2, ir_mode *mode)
+ * -----------------------------------------------------------
+ *
+ * Trivial.
+ *
+ * ir_node *new_Eor (ir_node *op1, ir_node *op2, ir_mode *mode)
+ * ------------------------------------------------------------
+ *
+ * Trivial.
+ *
+ * ir_node *new_Not (ir_node *op, ir_mode *mode)
+ * ---------------------------------------------
+ *
+ * This node constructs a constant where all bits are set to one
+ * and a Eor of this constant and the operator. This simulates a
+ * Not operation.
+ *
+ * ir_node *new_Shl (ir_node *op, ir_node *k, ir_mode *mode)
+ * ---------------------------------------------------------
+ *
+ * Trivial.
+ *
+ * ir_node *new_Shr (ir_node *op, ir_node *k, ir_mode *mode)
+ * ---------------------------------------------------------
+ *
+ * Logic shift right, i.e., zero extended.
+ *
+ *
+ * ir_node *new_Shrs (ir_node *op, ir_node *k, ir_mode *mode)
+ * ----------------------------------------------------------
+ *
+ * Arithmetic shift right, i.e., sign extended.
+ *
+ * ir_node *new_Rot (ir_node *op, ir_node *k, ir_mode *mode)
+ * ---------------------------------------------------------
+ *
+ * Rotates the operand to the (right??) by k bits.
+ *
+ * ir_node *new_Carry (ir_node *op1, ir_node *op2, ir_mode *mode)
+ * ------------------------------------------------------------
+ *
+ * Calculates the Carry value for integer addition. Used only
+ * in lowering code.
+ *
+ * ir_node *new_Borrow (ir_node *op1, ir_node *op2, ir_mode *mode)
+ * ------------------------------------------------------------
+ *
+ * Calculates the Borrow value for integer substraction. Used only
+ * in lowering code.
+ *
+ * ir_node *new_Conv (ir_node *op, ir_mode *mode)
+ * ---------------------------------------------
+ *
+ * Mode conversion. For allowed conversions see UKA Tech Report
+ * 1999-14.
+ *
+ * ir_node *new_Cmp (ir_node *op1, ir_node *op2)
+ * ---------------------------------------------
+ *
+ * Input:
+ * The two values to be compared.
+ * Output:
+ * A 16-tuple containing the results of the 16 different comparisons.
+ * The following is a list giving the comparisons and a projection
+ * number (pn_Cmp) to use in Proj nodes to extract the proper result.
+ * pn_Cmp_False false
+ * pn_Cmp_Eq equal
+ * pn_Cmp_Lt less
+ * pn_Cmp_Le less or equal
+ * pn_Cmp_Gt greater
+ * pn_Cmp_Ge greater of equal
+ * pn_Cmp_Lg less or greater
+ * pn_Cmp_Leg less, equal or greater = ordered
+ * pn_Cmp_Uo unordered
+ * pn_Cmp_Ue unordered or equal
+ * pn_Cmp_Ul unordered or less
+ * pn_Cmp_Ule unordered, less or equal
+ * pn_Cmp_Ug unordered or greater
+ * pn_Cmp_Uge unordered, greater or equal
+ * pn_Cmp_Ne unordered, less or greater = not equal
+ * pn_Cmp_True true
+ *
+ *
+ *
+ * ------------
+ *
+ * In general, Phi nodes are automaitcally inserted. In some cases, if
+ * all predecessors of a block are known, an explicit Phi node constructor
+ * is needed. E.g., to construct a FIRM graph for a statement as
+ * a = (b==c) ? 2 : 5;
+ *
+ * ir_node *new_Phi (int arity, ir_node **in, ir_mode *mode)
+ * ---------------------------------------------------------
+ *
+ * Creates a Phi node. The in's order has to correspond to the order
+ * of in's of current_block. This is not checked by the library!
+ * If one of the predecessors is Unknown (as it has to be filled in
+ * later) optimizations are skipped. This is necessary to
+ * construct Phi nodes in loops. Leaving Unknown in the Phi after finishing
+ * the construction may have strange effects, especially for interprocedural
+ * representation and analysis.
+ *
+ * Parameter
+ * arity number of predecessors
+ * **in array with predecessors
+ * *mode The mode of it's inputs and output.
+ * Inputs:
+ * A Phi node has as many inputs as the block it belongs to.
+ * Each input points to a definition of the same value on a
+ * different path in the control flow.
+ * Output
+ * The definition valid in this block.
+ *
+ * ir_node *new_Mux (ir_node *sel, ir_node *ir_false, ir_node *ir_true, ir_mode *mode)
+ * -----------------------------------------------------------------------------
+ *
+ * Creates a Mux node. This node implements the following semantic:
+ * If the sel node (which must be of mode_b) evaluates to true, its value is
+ * ir_true, else ir_false;
+ *
+ *
+ * ir_node *new_Psi (int arity, ir_node *conds[], ir_node *vals[], ir_mode *mode)
+ * -----------------------------------------------------------------------------
+ *
+ * Creates a Psi node. This node implements the following semantic:
+ * Enter it here!!!
+ *
+ *
+ * OPERATIONS TO MANAGE MEMORY EXPLICITLY
+ * --------------------------------------
+ *
+ * ir_node *new_Load (ir_node *store, ir_node *addr, ir_mode *mode)
+ * ----------------------------------------------------------------
+ *
+ * The Load operation reads a value from memory.
+ *
+ * Parameters:
+ * *store The current memory.
+ * *addr A pointer to the variable to be read in this memory.
+ * *mode The mode of the value to be loaded.
+ *
+ * Inputs:
+ * The memory and a pointer to a variable in this memory.
+ * Output:
+ * A tuple of the memory, a control flow to be taken in case of
+ * an exception and the loaded value.
+ *
+ * ir_node *new_Store (ir_node *store, ir_node *addr, ir_node *val)
+ * ----------------------------------------------------------------
+ *
+ * The Store operation writes a value to a variable in memory.
+ *
+ * Inputs:
+ * The memory, a pointer to a variable in this memory and the value
+ * to write to this variable.
+ * Output:
+ * A tuple of the changed memory and a control flow to be taken in
+ * case of an exception.
+ *
+ * ir_node *new_Alloc (ir_node *store, ir_node *size, ir_type *alloc_type,
+ * -----------------------------------------------------------------------
+ * where_alloc where)
+ * ------------------
+ *
+ * The Alloc node allocates a new variable. It can be specified whether the
+ * variable should be allocated to the stack or to the heap.
+ *
+ * Parameters:
+ * *store The memory which shall contain the new variable.
+ * ** *size The number of bytes to allocate. Old. **
+ * *size We decided that the size easily can be derived from the type.
+ * This field is for allocating arrays, i.e., it gives the multiple
+ * of the size of alloc_type to allocate memory for.
+ * *alloc_type The type of the allocated variable.
+ * where Where to allocate the variable, either heap_alloc or stack_alloc.
+ *
+ * Inputs:
+ * A memory and an unsigned integer.
+ * Output:
+ * A tuple of the changed memory, a control flow to be taken in
+ * case of an exception and the pointer to the new variable.
+ * Attributes:
+ * a.where Indicates where the variable is allocated.
+ * a.*type A pointer to the class the allocated data object
+ * belongs to.
+ *
+ * ir_node *new_Free (ir_node *store, ir_node *ptr, ir_node *size, ir_type *free_type,
+ * -----------------------------------------------------------------------------------
+ * where_alloc where)
+ * ------------------
+ *
+ * The Free node frees memory of the given variable.
+ *
+ * Parameters:
+ * *store The memory which shall contain the new variable.
+ * *ptr The pointer to the object to free.
+ * *size The number of objects of type free_type to free in a sequence.
+ * *free_type The type of the freed variable.
+ * where Where the variable was allocated, either heap_alloc or stack_alloc.
+ *
+ * Inputs:
+ * A memory, a pointer and an unsigned integer.
+ * Output:
+ * The changed memory.
+ * Attributes:
+ * f.*type A pointer to the type information of the freed data object.
+ *
+ * Not Implemented!
+ *
+ * ir_node *new_Sync (int arity, ir_node **in)
+ * -------------------------------------------
+ *
+ * The Sync operation unifies several partial memory blocks. These blocks
+ * have to be pairwise disjunct or the values in common locations have to
+ * be identical. This operation allows to specify all operations that eventually
+ * need several partial memory blocks as input with a single entrance by
+ * unifying the memories with a preceding Sync operation.
+ *
+ * Parameters
+ * arity The number of memories to synchronize.
+ * **in An array of pointers to nodes that produce an output of
+ * type memory.
+ * Inputs
+ * Several memories.
+ * Output
+ * The unified memory.
+ *
+ *
+ * SPECIAL OPERATIONS
+ * ------------------
+ *
+ * ir_node *new_Bad (void)
+ * -----------------------
+ *
+ * Returns the unique Bad node current_ir_graph->bad.
+ * This node is used to express results of dead code elimination.
+ *
+ * ir_node *new_NoMem (void)
+ * -----------------------------------------------------------------------------------
+ *
+ * Returns the unique NoMem node current_ir_graph->no_mem.
+ * This node is used as input for operations that need a Memory, but do not
+ * change it like Div by const != 0, analyzed calls etc.
+ *
+ * ir_node *new_Proj (ir_node *arg, ir_mode *mode, long proj)
+ * ----------------------------------------------------------
+ *
+ * Selects one entry of a tuple. This is a hidden edge with attributes.
+ *
+ * Parameters
+ * *arg A node producing a tuple.
+ * *mode The mode of the value to project.
+ * proj The position of the value in the tuple.
+ * Input:
+ * The tuple.
+ * Output:
+ * The value.
+ *
+ * ir_node *new_Tuple (int arity, ir_node **in)
+ * --------------------------------------------
+ *
+ * Builds a Tuple from single values. This is needed to implement
+ * optimizations that remove a node that produced a tuple. The node can be
+ * replaced by the Tuple operation so that the following Proj nodes have not to
+ * be changed. (They are hard to find due to the implementation with pointers
+ * in only one direction.) The Tuple node is smaller than any other
+ * node, so that a node can be changed into a Tuple by just changing it's
+ * opcode and giving it a new in array.
+ *
+ * Parameters
+ * arity The number of tuple elements.
+ * **in An array containing pointers to the nodes producing the
+ * tuple elements.
+ *
+ * ir_node *new_Id (ir_node *val, ir_mode *mode)
+ * ---------------------------------------------
+ *
+ * The single output of the Id operation is it's input. Also needed
+ * for optimizations.
+ *
+ *
+ * HIGH LEVEL OPERATIONS
+ * ---------------------
+ *
+ * ir_node *new_CopyB (ir_node *store, ir_node *dst, ir_node *src, ir_type *data_type)
+ * -----------------------------------------------------------------------------------
+ *
+ * Describes a high level block copy of a compound type from address src to
+ * address dst. Must be lowered to a Call to a runtime memory copy function.
+ *
+ *
+ * HIGH LEVEL OPERATIONS: Exception Support
+ * ----------------------------------------
+ * See TechReport 1999-14, chapter Exceptions.
+ *
+ * ir_node *new_InstOf(ir_node *store, ir_node *ptr, ir_type *type);
+ * -----------------------------------------------------------------------------------
+ *
+ * Describes a high level type check. Must be lowered to a Call to a runtime check
+ * function.
+ *
+ * ir_node *new_Raise (ir_node *store, ir_node *obj)
+ * -------------------------------------------------
+ *
+ * Raises an exception. Unconditional change of control flow. Writes
+ * an explicit Except variable to memory to pass it to the exception
+ * handler. Must be lowered to a Call to a runtime check
+ * function.
+ *
+ * Inputs:
+ * The memory state.
+ * A pointer to the Except variable.
+ * Output:
+ * A tuple of control flow and the changed memory state. The control flow
+ * points to the exception handler if it is definied in this procedure,
+ * else it points to the end_block.
+ *
+ * ir_node *new_Bound (ir_node *store, ir_node *idx, ir_node *lower, ir_node *upper);
+ * -----------------------------------------------------------------------------------
+ *
+ * Describes a high level bounds check. Must be lowered to a Call to a runtime check
+ * function.
+ *
+ *
+ * COPING WITH DATA OBJECTS
+ * ========================
+ *
+ * Two kinds of data objects have to be distinguished for generating
+ * FIRM. First there are local variables other than arrays that are
+ * known to be alias free. Second there are all other data objects.
+ * For the first a common SSA representation is built, the second
+ * are modeled by saving them to memory. The memory is treated as
+ * a single local variable, the alias problem is hidden in the
+ * content of this variable.
+ *
+ * All values known in a Block are listed in the block's attribute,
+ * block.**graph_arr which is used to automatically insert Phi nodes.
+ * The following two funcions can be used to add a newly computed value
+ * to the array, or to get the producer of a value, i.e., the current
+ * live value.
+ *
+ * inline void set_value (int pos, ir_node *value)
+ * -----------------------------------------------
+ *
+ * Has to be called for every assignment to a local variable. It
+ * adds the value to the array of used values at position pos. Pos
+ * has to be a unique identifier for an entry in the procedure's
+ * definition table. It can be used to access the value again.
+ * Requires current_block to be set correctly.
+ *
+ * ir_node *get_value (int pos, ir_mode *mode)
+ * -------------------------------------------
+ *
+ * Returns the node defining the value referred to by pos. If the
+ * value is not defined in this block a Phi node is generated and
+ * all definitions reaching this Phi node are collected. It can
+ * happen that the algorithm allocates an unnecessary Phi node,
+ * e.g. if there is only one definition of this value, but this
+ * definition reaches the currend block on several different
+ * paths. This Phi node will be eliminated if optimizations are
+ * turned on right after it's creation.
+ * Requires current_block to be set correctly.
+ *
+ * There are two special routines for the global store:
+ *
+ * void set_store (ir_node *store)
+ * -------------------------------
+ *
+ * Adds the store to the array of known values at a reserved
+ * position.
+ * Requires current_block to be set correctly.
+ *
+ * ir_node *get_store (void)
+ * -------------------------
+ *
+ * Returns the node defining the actual store.
+ * Requires current_block to be set correctly.
+ *
+ *
+ * inline void keep_alive (ir_node *ka)
+ * ------------------------------------
+ *
+ * Keep this node alive because it is (might be) not in the control
+ * flow from Start to End. Adds the node to the list in the end
+ * node.
+ *
+ */
+#ifndef _IRCONS_H_
+#define _IRCONS_H_
+
+#include "firm_common.h"
+#include "irnode.h"
+#include "irgraph.h"
+#include "dbginfo.h"
+
+/*-------------------------------------------------------------------------*/
+/* The raw interface */
+/*-------------------------------------------------------------------------*/
+
+/** Constructor for a Block node.
+ *
+ * Constructs a mature block with the given predecessors. Use Unknown
+ * nodes as predecessors to construct a block if the number of
+ * predecessors is known, but not the predecessors themselves. This
+ * constructor does not set current_block. It not be used with
+ * automatic Phi node construction.
+ *
+ * @param *db A Pointer for debug information.
+ * @param irg The ir graph the block belongs to.
+ * @param arity The number of control predecessors.
+ * @param in[] An array of control predecessors. The length of
+ * the array must be 'arity'. The constructor copies this array.
+ */
+ir_node *new_rd_Block (dbg_info *db, ir_graph *irg, int arity, ir_node *in[]);
+
+/** Constructor for a Start node.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ */
+ir_node *new_rd_Start (dbg_info *db, ir_graph *irg, ir_node *block);
+
+/** Constructor for a End node.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ */
+ir_node *new_rd_End (dbg_info *db, ir_graph *irg, ir_node *block);
+
+/** Constructor for a Jmp node.
+ *
+ * Jmp represents control flow to a single control successor.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ */
+ir_node *new_rd_Jmp (dbg_info *db, ir_graph *irg, ir_node *block);
+
+/** Constructor for an IJmp node.
+ *
+ * IJmp represents control flow to a single control successor not
+ * statically known i.e. an indirect Jmp.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *tgt The ir node representing the target address.
+ */
+ir_node *new_rd_IJmp (dbg_info *db, ir_graph *irg, ir_node *block, ir_node *tgt);
+
+/** Constructor for a Break node.
+ *
+ * Break represents control flow to a single control successor just as Jmp.
+ * The blocks separated by a break may not be concatenated by an optimization.
+ * It is used for the interprocedural representation where blocks are parted
+ * behind Call nodes to represent the control flow to called procedures.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belong to.
+ * @param *block The block the node belong to.
+ */
+ir_node *new_rd_Break (dbg_info *db, ir_graph *irg, ir_node *block);
+
+/** Constructor for a Cond node.
+ *
+ * If c is mode_b represents a conditional branch (if/else). If c is
+ * mode_Is/mode_Iu (?) represents a switch. (Allocates dense Cond
+ * node, default Proj is 0.)
+ *
+ * This is not consistent: Input to Cond is Is, Proj has as proj number
+ * longs.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *c The conditions parameter. Can be of mode b or I_u.
+ */
+ir_node *new_rd_Cond (dbg_info *db, ir_graph *irg, ir_node *block, ir_node *c);
+
+/** Constructor for a Return node.
+ *
+ * Returns the memory an zero or more return values. Only node that
+ * can end regular control flow.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *store The state of memory.
+ * @param arity Number of return values.
+ * @param *in Array of length arity with return values. The constructor copies this array.
+ */
+ir_node *new_rd_Return (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_node *store, int arity, ir_node *in[]);
+
+/** Constructor for a Const_type node.
+ *
+ * The constant represents a target value. This constructor sets high
+ * level type information for the constant value.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *mode The mode of the operands and results.
+ * @param *con Points to an entry in the constant table.
+ * @param *tp The type of the constant.
+ */
+ir_node *new_rd_Const_type (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_mode *mode, tarval *con, ir_type *tp);
+
+/** Constructor for a Const node.
+ *
+ * Constructor for a Const node. The constant represents a target
+ * value. Sets the type information to type_unknown. (No more
+ * supported: If tv is entity derives a somehow useful type.)
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *mode The mode of the operands and results.
+ * @param *con Points to an entry in the constant table.
+ */
+ir_node *new_rd_Const (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_mode *mode, tarval *con);
+
+/** Constructor for a SymConst_type node.
+ *
+ * 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.
+ * - 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).
+ *
+ * Mention union in declaration so that the firmjni generator recognizes that
+ * it can not cast the argument to an int.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param symkind The kind of the symbolic constant: type_tag, size, addr_name or addr_ent.
+ * @param value A type, entity or a ident depending on the SymConst kind.
+ * @param tp The source type of the constant.
+ */
+ir_node *new_rd_SymConst_type (dbg_info *db, ir_graph *irg, ir_node *block, union symconst_symbol value,
+ symconst_kind symkind, ir_type *tp);
+
+/** Constructor for a SymConst node.
+ *
+ * Same as new_rd_SymConst_type, except that it sets the type to type_unknown. */
+ir_node *new_rd_SymConst (dbg_info *db, ir_graph *irg, ir_node *block,
+ union symconst_symbol value, symconst_kind symkind);
+
+/** Constructor for a SymConst addr_ent node.
+ *
+ * Same as new_rd_SymConst_type, except that the constructor is tailored for
+ * symconst_addr_ent.
+ * Adds the SymConst to the start block of irg. */
+ir_node *new_rd_SymConst_addr_ent (dbg_info *db, ir_graph *irg, entity *symbol, ir_type *tp);
+
+/** Constructor for a SymConst addr_name node.
+ *
+ * Same as new_rd_SymConst_type, except that the constructor is tailored for
+ * symconst_addr_ent.
+ * Adds the SymConst to the start block of irg. */
+ir_node *new_rd_SymConst_addr_name (dbg_info *db, ir_graph *irg, ident *symbol, ir_type *tp);
+
+/** Constructor for a SymConst type_tag node.
+ *
+ * Same as new_rd_SymConst_type, except that the constructor is tailored for
+ * symconst_addr_ent.
+ * Adds the SymConst to the start block of irg. */
+ir_node *new_rd_SymConst_type_tag (dbg_info *db, ir_graph *irg, ir_type *symbol, ir_type *tp);
+
+/** Constructor for a SymConst size node.
+ *
+ * Same as new_rd_SymConst_type, except that the constructor is tailored for
+ * symconst_addr_ent.
+ * Adds the SymConst to the start block of irg. */
+ir_node *new_rd_SymConst_size (dbg_info *db, ir_graph *irg, ir_type *symbol, ir_type *tp);
+
+/** Constructor for a simpleSel node.
+ *
+ * This is a shortcut for the new_rd_Sel() constructor. To be used for
+ * Sel nodes that do not select from an array, i.e., have no index
+ * inputs. It adds the two parameters 0, NULL.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *store The memory in which the object the entity should be
+ * selected from is allocated.
+ * @param *objptr The object from that the Sel operation selects a
+ * single attribute out.
+ * @param *ent The entity to select.
+ */
+ir_node *new_rd_simpleSel (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_node *store, ir_node *objptr, entity *ent);
+
+/** Constructor for a Sel node.
+ *
+ * The select node selects an entity (field or method) from an entity
+ * with a compound type. It explicitly specifies the entity selected.
+ * Dynamically the node may select entities that overwrite the given
+ * entity. If the selected entity is an array element entity the Sel
+ * node takes the required array indices as inputs.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *store The memory in which the object the entity should be selected
+ * from is allocated.
+ * @param *objptr A pointer to a compound entity the Sel operation selects a
+ * single attribute from.
+ * @param *n_index The number of array indices needed to select an array element entity.
+ * @param *index[] If the compound entity is an array the indices of the selected
+ * element entity. The constructor copies this array.
+ * @param *ent The entity to select.
+ */
+ir_node *new_rd_Sel (dbg_info *db, ir_graph *irg, ir_node *block, ir_node *store,
+ ir_node *objptr, int n_index, ir_node *index[], entity *ent);
+
+/** Constructor for a Call node.
+ *
+ * Represents all kinds of method and function calls.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *store The current memory state.
+ * @param *callee A pointer to the called procedure.
+ * @param arity The number of procedure parameters.
+ * @param *in[] An array with the procedure parameters. The constructor copies this array.
+ * @param *tp Type information of the procedure called.
+ */
+ir_node *new_rd_Call (dbg_info *db, ir_graph *irg, ir_node *block, ir_node *store,
+ ir_node *callee, int arity, ir_node *in[], ir_type *tp);
+
+/** Constructor for a Add node.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *op1 The first operand.
+ * @param *op2 The second operand.
+ * @param *mode The mode of the operands and the result.
+ */
+ir_node *new_rd_Add (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_node *op1, ir_node *op2, ir_mode *mode);
+
+/** Constructor for a Sub node.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *op1 The first operand.
+ * @param *op2 The second operand.
+ * @param *mode The mode of the operands and the result.
+ */
+ir_node *new_rd_Sub (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_node *op1, ir_node *op2, ir_mode *mode);
+
+/** Constructor for a Minus node.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *op The operand .
+ * @param *mode The mode of the operand and the result.
+ */
+ir_node *new_rd_Minus (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_node *op, ir_mode *mode);
+
+/** Constructor for a Mul node.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *op1 The first operand.
+ * @param *op2 The second operand.
+ * @param *mode The mode of the operands and the result.
+ */
+ir_node *new_rd_Mul (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_node *op1, ir_node *op2, ir_mode *mode);
+
+/** Constructor for a Quot node.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *memop The store needed to model exceptions
+ * @param *op1 The first operand.
+ * @param *op2 The second operand.
+ */
+ir_node *new_rd_Quot (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_node *memop, ir_node *op1, ir_node *op2);
+
+/** Constructor for a DivMod node.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *memop The store needed to model exceptions
+ * @param *op1 The first operand.
+ * @param *op2 The second operand.
+ */
+ir_node *new_rd_DivMod (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_node *memop, ir_node *op1, ir_node *op2);
+
+/** Constructor for a Div node.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *memop The store needed to model exceptions
+ * @param *op1 The first operand.
+ * @param *op2 The second operand.
+ */
+ir_node *new_rd_Div (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_node *memop, ir_node *op1, ir_node *op2);
+
+/** Constructor for a Mod node.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *memop The store needed to model exceptions
+ * @param *op1 The first operand.
+ * @param *op2 The second operand.
+ */
+ir_node *new_rd_Mod (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_node *memop, ir_node *op1, ir_node *op2);
+
+/** Constructor for a Abs node.
+ *
+ * @param *db A pointer for debug information.
+ * @param *irg The ir graph the node belongs to.
+ * @param *block The ir block the node belongs to.
+ * @param *op The operand
+ * @param *mode The mode of the operands and the result.
+ */
+ir_node *new_rd_Abs (dbg_info *db, ir_graph *irg, ir_node *block,
+ ir_node *op, ir_mode *mode);