irnode.h 41.8 KB
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/*
 * Project:     libFIRM
 * File name:   ir/ir/irnode.h
 * Purpose:     Representation of an intermediate operation.
 * Author:      Martin Trapp, Christian Schaefer
 * Modified by: Goetz Lindenmaier
 * Created:
 * CVS-ID:      $Id$
 * Copyright:   (c) 1998-2003 Universität Karlsruhe
 * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
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 */
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# ifndef _IRNODE_H_
# define _IRNODE_H_

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#include <stddef.h>

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# include "irgraph.h"
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# include "entity.h"
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# include "firm_common.h"
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# include "irop.h"
# include "irmode.h"
# include "type.h"
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# include "irextbb.h"
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# include "dbginfo.h"
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/**
 * @file irnode.h
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 *
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 * @author Martin Trapp, Christian Schaefer
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 *
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 * Declarations of an ir node.
 */

/**
 * @defgroup ir_node Declarations of an ir node.
 *
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 * The type definition of ir_node is also in irgraph.h to resolve
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 *  recursion between irnode.h and irgraph.h
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 *
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 * ir_node - a datatype representing a Firm node
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 *
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 *  The common fields are:
 *
 *  - firm_kind - A firm_kind tag containing k_type.  This is useful
 *                for dynamically checking whether a node is a ir_node.
 *  - arity     - The number of predecessors in the Firm graph.
 *  - in        - A list with the predecessors in the Firm graph.  There are
 *                routines to access individual elements and to obtain the
 *                array.  The method returning the array should not be used.
 *  - mode      - The mode of the node.  There are routines to get the mode
 *                but also to access the mode's fields directly.
 *  - opcode    - The opcode of the node. There are routines to get the opcode
 *                but also to access the opcode's fields directly.
 *  - node_nr   - A unique number for the node.  Available only if debugging
 *                is turned on.
 * @{
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 */
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#ifndef _IR_NODE_TYPEDEF_
#define _IR_NODE_TYPEDEF_
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typedef struct ir_node ir_node;
#endif

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#ifdef __cplusplus
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extern "C" {
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#endif

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/**
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 *   you can work on the graph without considering the different types
 *   of nodes, it's just a big graph.
 */
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/**
 *   Checks whether a pointer points to a ir node.
 *
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 *   @param thing   an arbitrary pointer
 *   @return        non-zero if the thing is a ir mode, else zero
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 */
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int is_ir_node (const void *thing);
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/**
 * Returns the number of predecessors without the block predecessor.
 *
 * @param node   the IR-node
 */
int           get_irn_arity         (const ir_node *node);
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int           get_irn_intra_arity   (const ir_node *node);
int           get_irn_inter_arity   (const ir_node *node);
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/** Replaces the old in array by a new one that will contain the ins given in
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   the parameters.  Conserves the block predecessor.  It copies the array passed.
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   This function is necessary to adjust in arrays of blocks, calls and phis.
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   Assumes that current_ir_graph is set to the graph containing "node".
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   "in" must contain all predecessors except the block that are required for
   the nodes opcode. */
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void          set_irn_in            (ir_node *node, int arity, ir_node *in[]);

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/* to iterate through the predecessors without touching the array. No
   order of predecessors guaranteed.
   To iterate over the operands iterate from 0 to i < get_irn_arity(),
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   to iterate including the Block predecessor iterate from i = -1 to
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   i < get_irn_arity. */
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/* Access predecessor n */
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/**
 * Get the n-th predecessor of a node.
 * This function removes Id predecessors.
 */
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ir_node      *get_irn_n             (const ir_node *node, int n);
ir_node      *get_irn_intra_n       (const ir_node *node, int n);
ir_node      *get_irn_inter_n       (const ir_node *node, int n);
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/** Replace the n-th predecessor of a node with a new one. */
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void          set_irn_n             (ir_node *node, int n, ir_node *in);
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/* Sets the mode struct of node.  */
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void          set_irn_mode (ir_node *node, ir_mode *mode);
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/** Gets the mode struct of a node.  */
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ir_mode      *get_irn_mode          (const ir_node *node);
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/** Gets the mode-enum modecode. */
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modecode      get_irn_modecode      (const ir_node *node);
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/** Gets the ident for a string representation of the mode .*/
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ident        *get_irn_modeident     (const ir_node *node);
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/** Gets the string representation of the mode .*/
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const char   *get_irn_modename      (const ir_node *node);
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/** Gets the opcode struct of the node. */
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ir_op        *get_irn_op            (const ir_node *node);
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/** Sets the opcode struct of the node. */
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void          set_irn_op            (ir_node *node, ir_op *op);
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/** Gets the opcode-enum of the node. */
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opcode        get_irn_opcode        (const ir_node *node);
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/** Get the string representation of the opcode. */
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const char   *get_irn_opname        (const ir_node *node);
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/** Get the ident for a string representation of the opcode. */
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ident        *get_irn_opident       (const ir_node *node);
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/** Gets the visited counter of a node. */
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unsigned long get_irn_visited (const ir_node *node);
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/** Sets the visited counter of a node. */
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void          set_irn_visited (ir_node *node, unsigned long visited);
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/** Sets visited to get_irg_visited(current_ir_graph). */
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void          mark_irn_visited (ir_node *node);
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/** Returns 1 if visited < get_irg_visited(current_ir_graph). */
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int           irn_not_visited  (const ir_node *node);
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/** Returns 1 if visited >= get_irg_visited(current_ir_graph). */
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int           irn_visited      (const ir_node *node);
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/**
 * Sets the link of a node.
 * Only allowed if the graph is NOT in phase_building.
 */
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void          set_irn_link     (ir_node *node, void *link);
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/** Returns the link of a node.  */
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void         *get_irn_link     (const ir_node *node);
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/** Returns the ir_graph this node belongs to. Only valid if irg
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 *  is in state op_pin_state_pinned (irg is only stored in the block. */
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ir_graph     *get_irn_irg      (const ir_node *node);
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/** Outputs a unique number for this node if libFIRM is compiled for
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   debugging, (configure with --enable-debug) else returns address
   of node cast to long. */
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long          get_irn_node_nr  (const ir_node *node);
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/** Returns the pinned state of a node. */
op_pin_state get_irn_pinned    (const ir_node *node);

/** Set pin state for nodes with op pin state op_pin_state_exc_pinned */
void set_irn_pinned(ir_node *node, op_pin_state state);
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/**
 * irnode constructor.
 * Create a new irnode in irg, with an op, mode, arity and
 * some incoming irnodes.
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 * This constructor is used in every specified irnode constructor.
 *
 * @param db    Debug info.
 * @param irg   IR-graph on with this new node should be constructed.
 * @param op    The opcode of the new node.
 * @param mode  The mode of the new node.
 * @param arity The arity of the new node, may be <0 if yet.
 * @param in    An array of arity predecessor nodes.
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 */
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ir_node *
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new_ir_node (dbg_info *db,
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         ir_graph *irg,
         ir_node *block,
         ir_op *op,
         ir_mode *mode,
         int arity,
         ir_node *in[]);
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/** Return the block the node belongs to.
 *
 * This works for all except Block.  It can return Blocks or the Bad node.
 *
 * To express the difference to access routines that work for all
 * nodes we use infix "nodes" and do not name this function
 * get_irn_block. */
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ir_node  *get_nodes_block (const ir_node *node);
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/** Sets the Block of a node. */
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void      set_nodes_block (ir_node *node, ir_node *block);
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/**
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 * @function get_irn_block()
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 * @see get_nodes_block()
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 */
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/**
 * Projection numbers for result of Start node: use for Proj nodes!
 */
typedef enum {
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  pn_Start_X_initial_exec,   /**< Projection on the initial control flow. */
  pn_Start_M,                /**< Projection on the initial memory. */
  pn_Start_P_frame_base,     /**< Projection on the frame base pointer. */
  pn_Start_P_globals,        /**< Projection on the pointer to the data segment
                                  containing _all_ global entities. */
  pn_Start_T_args,           /**< Projection on all arguments. */
  pn_Start_P_value_arg_base, /**< Pointer to region of compound value arguments as defined by
                                  type of this method. */
  pn_Start_max               /**< number of projections from a Start */
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} pn_Start; /* Projection numbers for Start. */

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/** Test whether arbitrary node is frame pointer.
 *
 * Test whether arbitrary node is frame pointer, i.e. Proj(pn_Start_P_frame_base)
 * from Start.  If so returns frame type, else Null. */
type *is_frame_pointer(ir_node *n);

/** Test whether arbitrary node is globals pointer.
 *
 * Test whether arbitrary node is globals pointer, i.e. Proj(pn_Start_P_globals)
 * from Start.  If so returns global type, else Null. */
type *is_globals_pointer(ir_node *n);

/** Test whether arbitrary node is value arg base.
 *
 * Test whether arbitrary node is value arg base, i.e. Proj(pn_Start_P_value_arg_base)
 * from Start.   If so returns 1, else 0. */
int   is_value_arg_pointer(ir_node *n);

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/* @@@ no more supported  */
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ir_node **get_Block_cfgpred_arr (ir_node *node);
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int       get_Block_n_cfgpreds (ir_node *node);
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ir_node  *get_Block_cfgpred (ir_node *node, int pos);
void      set_Block_cfgpred (ir_node *node, int pos, ir_node *pred);
bool      get_Block_matured (ir_node *node);
void      set_Block_matured (ir_node *node, bool matured);
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/** A visited flag only for block nodes.
 *  @see also: get_irn_visited() inc_irg_visited() inc_irg_block_visited()*/
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unsigned long get_Block_block_visited (ir_node *node);
void      set_Block_block_visited (ir_node *node, unsigned long visit);
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ir_node  *set_Block_dead(ir_node *block);
int       is_Block_dead(const ir_node *block);

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/* For this current_ir_graph must be set. */
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void      mark_Block_block_visited(ir_node *node);
int       Block_not_block_visited(ir_node *node);
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/* Set and remove interprocedural predecessors. If the interprocedural
 * predecessors are removed, the node has the same predecessors in
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 * both views.
 * @@@ Maybe better:  arity is zero if no cg preds. */
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void      set_Block_cg_cfgpred_arr(ir_node * node, int arity, ir_node ** in);
void      set_Block_cg_cfgpred(ir_node * node, int pos, ir_node * pred);
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/* @@@ not supported */
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ir_node **get_Block_cg_cfgpred_arr(ir_node * node);
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/** Returns the number of interprocedural predecessors.  0 if none. */
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int       get_Block_cg_n_cfgpreds(ir_node * node);
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/** Return the interprocedural predecessor at position pos. */
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ir_node  *get_Block_cg_cfgpred(ir_node * node, int pos);
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/* frees the memory. */
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void      remove_Block_cg_cfgpred_arr(ir_node * node);

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/** returns the extended basic block a block belongs to */
ir_extblk *get_Block_extbb(const ir_node *block);
/** sets the extended basic block a block belongs to */
void set_Block_extbb(ir_node *block, ir_extblk *extblk);

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/** Return the number of Keep alive node. */
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int  get_End_n_keepalives(ir_node *end);
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/** Return the Keep alive node a position pos. */
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ir_node *get_End_keepalive(ir_node *end, int pos);
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/** Keep alive dedicated nodes.  These must be either PhiM or Block nodes. */
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void add_End_keepalive (ir_node *end, ir_node *ka);
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/** Set the Keep alive node at position pos. */
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void set_End_keepalive(ir_node *end, int pos, ir_node *ka);
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/** Some parts of the End node are allocated separately -- their memory
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   is not recovered by dead_node_elimination if a End node is dead.
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   free_End() frees these data structures. */
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void free_End (ir_node *end);
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/* We distinguish three kinds of Cond nodes.  These can be distinguished
   by the mode of the selector operand and an internal flag of type cond_kind.
   First we distinguish binary Conds and switch Conds.
   A binary Cond has as selector a boolean value.  Proj(0) projects the control
   flow for case "False", Proj(1) the control flow for "True".  A binary Cond
   is recognized by the boolean selector.
   The switch Cond has as selector an unsigned integer.  It produces as result
   an n+1 Tuple (cf0, ... , cfn) of control flows.
   We differ two flavours of this Cond.  The first, the dense Cond, passes
   control along output i if the selector value is i, 0 <= i <= n.  If the
   selector value is >n it passes control along output n.
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   The second Cond flavor diffirences in the treatment of cases not specified in
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   the source program.  It magically knows about the existence of Proj nodes.
   It only passes control along output i, 0 <= i <= n, if a node Proj(Cond, i)
   exists.  Else it passes control along output n (even if this Proj does not
   exist.)  This Cond we call "fragmentary".  There is a special constructor
   new_defaultProj that automatically sets the flavor.
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   The two switch flavors are distinguished by a flag of type cond_kind.
   Default flavor is "dense"
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*/
typedef enum {
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  dense,        /**< Default. Missing Proj nodes are dead control flow. */
  fragmentary   /**< Special. No control flow optimizations allowed.  Missing
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           Proj nodes mean default control flow, i.e., Proj(n). */
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} cond_kind;

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ir_node  *get_Cond_selector (ir_node *node);
void      set_Cond_selector (ir_node *node, ir_node *selector);
cond_kind get_Cond_kind (ir_node *node);
void      set_Cond_kind (ir_node *node, cond_kind kind);
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long      get_Cond_defaultProj (ir_node *node);
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/**
 * Projection numbers for conditions.
 */
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typedef enum {
  pn_Cond_false,    /**< Control flow if operand is "false". */
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  pn_Cond_true,     /**< Control flow if operand is "true".  */
  pn_Cond_max       /**< number of projections from a Cond */
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} pn_Cond;  /* Projection numbers for Cond. */

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ir_node  *get_Return_mem (ir_node *node);
void      set_Return_mem (ir_node *node, ir_node *mem);
ir_node **get_Return_res_arr (ir_node *node);
int       get_Return_n_ress (ir_node *node);
ir_node  *get_Return_res (ir_node *node, int pos);
void      set_Return_res (ir_node *node, int pos, ir_node *res);
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ir_node *get_Raise_mem (ir_node *node);
void     set_Raise_mem (ir_node *node, ir_node *mem);
ir_node *get_Raise_exo_ptr (ir_node *node);  /* PoinTeR to EXception Object */
void     set_Raise_exo_ptr (ir_node *node, ir_node *exoptr);
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/**
 * Projection numbers for Raise.
 */
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typedef enum {
  pn_Raise_X,    /**< Execution result. */
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  pn_Raise_M,    /**< Memory result.    */
  pn_Raise_max   /**< number of projections from a Raise */
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} pn_Raise;  /* Projection numbers for Raise. */

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typedef enum {
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  CNST_NULL     =  0, /**< The node is a const(0). */
  CNST_ONE      = +1, /**< The node is a const(1). */
  CNST_ALL_ONE  = -1, /**< The node is a const(11111...). */
  CNST_OTHER    =  2, /**< The tarvel of the const has another value. */
  CNST_SYMCONST =  3, /**< The node is symconst. */
  CNST_NO_CONST =  4  /**< The node is no const at all. */
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} cnst_classify_t;

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tarval  *get_Const_tarval (ir_node *node);
void     set_Const_tarval (ir_node *node, tarval *con);
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/**
 * Classify a node concerning constant properties.
 * @param irn A node to check for.
 * @return Constant properties of that node.
 */
cnst_classify_t classify_Const(ir_node *irn);

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/** Returns the source language type of a Const node.
 * Must be an atomic type.  Mode of type must be mode of node.
 */
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type    *get_Const_type   (ir_node *node);
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/** Sets the source language type of a Const node. */
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void     set_Const_type   (ir_node *node, type *tp);
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/**  This enum names the three different kinds of symbolic Constants
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     represented by SymConst.  The content of the attribute type_or_id
     depends on this tag.  Use the proper access routine after testing
     this flag. */
typedef enum {
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  symconst_type_tag,    /**< The SymConst is a type tag for the given type.
			   Type_or_id_p is type *. */
  symconst_size,        /**< The SymConst is the size of the given type.
			   Type_or_id_p is type *. */
  symconst_addr_name,   /**< The SymConst is a symbolic pointer to be filled in
			   by the linker.  The pointer is represented by a string.
			   Type_or_id_p is ident *. */
  symconst_addr_ent     /**< The SymConst is a symbolic pointer to be filled in
			   by the linker.  The pointer is represented by an entity.
			   Type_or_id_p is entity *. */
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} symconst_kind;
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/** SymConst attributes
    This union contains the symbolic information represented by the node  */
union symconst_symbol {
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  type   *type_p;
  ident  *ident_p;
  entity *entity_p;
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};
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typedef union symconst_symbol symconst_symbol;

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/** Get the kind of the SymConst. */
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symconst_kind get_SymConst_kind (const ir_node *node);
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/** Set the kind of the SymConst. */
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void          set_SymConst_kind (ir_node *node, symconst_kind num);
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/** Only to access SymConst of kind type_tag or size.  Else assertion: */
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type    *get_SymConst_type (ir_node *node);
void     set_SymConst_type (ir_node *node, type *tp);
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/** Only to access SymConst of kind addr_name.  Else assertion: */
ident   *get_SymConst_name (ir_node *node);
void     set_SymConst_name (ir_node *node, ident *name);

/** Only to access SymConst of kind addr_ent.  Else assertion: */
entity  *get_SymConst_entity (ir_node *node);
void     set_SymConst_entity (ir_node *node, entity *ent);

/** Sets both: type and ptrinfo.  Needed to treat the node independent of
   its semantics.  Does a memcpy for the memory sym points to. */
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/* write 'union': firmjni then does not create a method... */
union symconst_symbol get_SymConst_symbol (ir_node *node);
void                  set_SymConst_symbol (ir_node *node,
					   union symconst_symbol sym);
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/** Access the type of the value represented by the SymConst.
 *
 *  Example: primitive type int for SymConst size. */
type *get_SymConst_value_type (ir_node *node);
void  set_SymConst_value_type (ir_node *node, type *tp);

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ir_node *get_Sel_mem (ir_node *node);
void     set_Sel_mem (ir_node *node, ir_node *mem);
ir_node *get_Sel_ptr (ir_node *node);  /* ptr to the object to select from */
void     set_Sel_ptr (ir_node *node, ir_node *ptr);
ir_node **get_Sel_index_arr (ir_node *node);
int      get_Sel_n_indexs (ir_node *node);
ir_node *get_Sel_index (ir_node *node, int pos);
void     set_Sel_index (ir_node *node, int pos, ir_node *index);
entity  *get_Sel_entity (ir_node *node); /* entity to select */
void     set_Sel_entity (ir_node *node, entity *ent);
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/** InstOf access */
type    *get_InstOf_ent (ir_node *node);
void    set_InstOf_ent (ir_node *node, type *ent);
ir_node *get_InstOf_store (ir_node *node);
void    set_InstOf_store (ir_node *node, ir_node *obj);
ir_node *get_InstOf_obj (ir_node *node);
void    set_InstOf_obj (ir_node *node, ir_node *obj);

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/**
 * Projection numbers for result of Call node: use for Proj nodes!
 */
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typedef enum {
  pn_Call_M_regular = 0,  /**< The memory result. */
  pn_Call_T_result  = 2,  /**< The tuple containing all (0, 1, 2, ...) results */
  pn_Call_P_value_res_base = 4,/**< A pointer to the memory region containing copied results
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                 passed by value (for compound result types). */
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  pn_Call_X_except  = 1,  /**< The control flow result branching to the exception handler */
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  pn_Call_M_except  = 3,  /**< The memory result in case the called method terminated with
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                 an exception */
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  pn_Call_max       = 5   /**< number of projections from a Call */
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} pn_Call;   /* Projection numbers for Call. */

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ir_node *get_Call_mem (ir_node *node);
void     set_Call_mem (ir_node *node, ir_node *mem);
ir_node *get_Call_ptr (ir_node *node);
void     set_Call_ptr (ir_node *node, ir_node *ptr);
ir_node **get_Call_param_arr (ir_node *node);
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/** Gets the number of parameters of a call. */
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int      get_Call_n_params (ir_node *node);
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/** Gets the call parameter at position pos. */
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ir_node *get_Call_param (ir_node *node, int pos);
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/** Sets the call parameter at position pos. */
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void     set_Call_param (ir_node *node, int pos, ir_node *param);
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/** Gets the type of a call. */
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type    *get_Call_type (ir_node *node);
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/** Sets the type of a call. */
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void     set_Call_type (ir_node *node, type *tp);
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/** Gets the arity of a call. Identical to get_Call_n_params(). */
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int      get_Call_arity (ir_node *node);
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/** Set, get and remove the callee information for a Call node.
 *
 *  The callee information lists all method entities that can be called
 *  from this node.  If the address expression can not be analyzed fully,
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 *  e.g., as entities can be called that are not in the compilation unit,
 *  the array contains the unknown_entity.  The array contains only entities
 *  with peculiarity_existent, but with all kinds of visibility.  The entities
 *  not necessarily contain an irg.
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 *
 *  The array is only accessible if callee information is valid.  See flag
 *  in graph.
 *
 *  The memory allocated for the array is managed automatically, i.e., it must
 *  not be freed if the Call node is removed from the graph.
 *
 *  @param node A Call node.
 */
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int     Call_has_callees      (ir_node *node);
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int     get_Call_n_callees    (ir_node *node);
entity *get_Call_callee       (ir_node *node, int pos);
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/** Set the full callee array.
 *
 *  The passed array is copied. Assumes current_ir_graph set properly! */
void    set_Call_callee_arr   (ir_node *node, const int n, entity **arr);
void    remove_Call_callee_arr(ir_node *node);
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ir_node  *get_CallBegin_ptr  (ir_node *node);
void      set_CallBegin_ptr  (ir_node *node, ir_node *ptr);
ir_node  *get_CallBegin_call (ir_node *node);
void      set_CallBegin_call (ir_node *node, ir_node *call);
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/* For unary and binary arithmetic operations the access to the
   operands can be factored out.  Left is the first, right the
   second arithmetic value  as listed in tech report 1999-44.
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   unops are: Minus, Abs, Not, Conv, Cast
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   binops are: Add, Sub, Mul, Quot, DivMod, Div, Mod, And, Or, Eor, Shl,
   Shr, Shrs, Rot, Cmp */
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int      is_unop (const ir_node *node);
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ir_node *get_unop_op (ir_node *node);
void     set_unop_op (ir_node *node, ir_node *op);
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int      is_binop (const ir_node *node);
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ir_node *get_binop_left (ir_node *node);
void     set_binop_left (ir_node *node, ir_node *left);
ir_node *get_binop_right (ir_node *node);
void     set_binop_right (ir_node *node, ir_node *right);

ir_node *get_Add_left (ir_node *node);
void     set_Add_left (ir_node *node, ir_node *left);
ir_node *get_Add_right (ir_node *node);
void     set_Add_right (ir_node *node, ir_node *right);

ir_node *get_Sub_left (ir_node *node);
void     set_Sub_left (ir_node *node, ir_node *left);
ir_node *get_Sub_right (ir_node *node);
void     set_Sub_right (ir_node *node, ir_node *right);

ir_node *get_Minus_op (ir_node *node);
void     set_Minus_op (ir_node *node, ir_node *op);

ir_node *get_Mul_left (ir_node *node);
void     set_Mul_left (ir_node *node, ir_node *left);
ir_node *get_Mul_right (ir_node *node);
void     set_Mul_right (ir_node *node, ir_node *right);

ir_node *get_Quot_left (ir_node *node);
void     set_Quot_left (ir_node *node, ir_node *left);
ir_node *get_Quot_right (ir_node *node);
void     set_Quot_right (ir_node *node, ir_node *right);
ir_node *get_Quot_mem (ir_node *node);
void     set_Quot_mem (ir_node *node, ir_node *mem);
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/**
 * Projection numbers for Quot: use for Proj nodes!
 */
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typedef enum {
  pn_Quot_M,           /**< Memory result.    */
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  pn_Quot_X_except,    /**< Execution result if exception occurred. */
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  pn_Quot_res,         /**< Result of computation. */
  pn_Quot_max          /**< number of projections from a Quot */
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} pn_Quot;  /* Projection numbers for Quot. */

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ir_node *get_DivMod_left (ir_node *node);
void     set_DivMod_left (ir_node *node, ir_node *left);
ir_node *get_DivMod_right (ir_node *node);
void     set_DivMod_right (ir_node *node, ir_node *right);
ir_node *get_DivMod_mem (ir_node *node);
void     set_DivMod_mem (ir_node *node, ir_node *mem);
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/**
 * Projection numbers for DivMod: use for Proj nodes!
 */
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typedef enum {
  pn_DivMod_M,           /**< Memory result.    */
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  pn_DivMod_X_except,    /**< Execution result if exception occurred. */
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  pn_DivMod_res_div,     /**< Result of computation a / b. */
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  pn_DivMod_res_mod,     /**< Result of computation a % b. */
  pn_DivMod_max          /**< number of projections from a DivMod */
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} pn_DivMod;  /* Projection numbers for DivMod. */

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ir_node *get_Div_left (ir_node *node);
void     set_Div_left (ir_node *node, ir_node *left);
ir_node *get_Div_right (ir_node *node);
void     set_Div_right (ir_node *node, ir_node *right);
ir_node *get_Div_mem (ir_node *node);
void     set_Div_mem (ir_node *node, ir_node *mem);
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/**
 * Projection numbers for Div: use for Proj nodes!
 */
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typedef enum {
  pn_Div_M,           /**< Memory result.    */
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  pn_Div_X_except,    /**< Execution result if exception occurred. */
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  pn_Div_res          /**< Result of computation. */
} pn_Div;  /* Projection numbers for Div. */

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ir_node *get_Mod_left (ir_node *node);
void     set_Mod_left (ir_node *node, ir_node *left);
ir_node *get_Mod_right (ir_node *node);
void     set_Mod_right (ir_node *node, ir_node *right);
ir_node *get_Mod_mem (ir_node *node);
void     set_Mod_mem (ir_node *node, ir_node *mem);
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/**
 * Projection numbers for Mod: use for Proj nodes!
 */
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typedef enum {
  pn_Mod_M,           /**< Memory result.    */
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  pn_Mod_X_except,    /**< Execution result if exception occurred. */
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  pn_Mod_res,         /**< Result of computation. */
  pn_Mod_max          /**< number of projections from a Mod */
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} pn_Mod;  /* Projection numbers for Mod. */

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ir_node *get_Abs_op (ir_node *node);
void     set_Abs_op (ir_node *node, ir_node *op);
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ir_node *get_And_left (ir_node *node);
void     set_And_left (ir_node *node, ir_node *left);
ir_node *get_And_right (ir_node *node);
void     set_And_right (ir_node *node, ir_node *right);
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ir_node *get_Or_left (ir_node *node);
void     set_Or_left (ir_node *node, ir_node *left);
ir_node *get_Or_right (ir_node *node);
void     set_Or_right (ir_node *node, ir_node *right);
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ir_node *get_Eor_left (ir_node *node);
void     set_Eor_left (ir_node *node, ir_node *left);
ir_node *get_Eor_right (ir_node *node);
void     set_Eor_right (ir_node *node, ir_node *right);
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ir_node *get_Not_op (ir_node *node);
void     set_Not_op (ir_node *node, ir_node *op);
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/**
 * Projection numbers for Cmp are defined several times.
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 * The bit patterns are used for various tests, so don't change.
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 * The "unordered" values are possible results of comparing
 * floating point numbers.
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 * Note that the encoding is imported, so do NOT change the order.
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 */
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typedef enum {
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  pn_Cmp_False = 0,                             /**< false */
  pn_Cmp_Eq    = 1,                             /**< equal */
  pn_Cmp_Lt    = 2,                             /**< less */
  pn_Cmp_Le    = pn_Cmp_Eq|pn_Cmp_Lt,           /**< less or equal */
  pn_Cmp_Gt    = 4,                             /**< greater */
  pn_Cmp_Ge    = pn_Cmp_Eq|pn_Cmp_Gt,           /**< greater or equal */
  pn_Cmp_Lg    = pn_Cmp_Lt|pn_Cmp_Gt,           /**< less or greater */
  pn_Cmp_Leg   = pn_Cmp_Lt|pn_Cmp_Eq|pn_Cmp_Gt, /**< less, equal or greater = ordered */
  pn_Cmp_Uo    = 8,                             /**< unordered */
  pn_Cmp_Ue    = pn_Cmp_Uo|pn_Cmp_Eq,           /**< unordered or equal */
  pn_Cmp_Ul    = pn_Cmp_Uo|pn_Cmp_Lt,           /**< unordered or less */
  pn_Cmp_Ule   = pn_Cmp_Uo|pn_Cmp_Eq|pn_Cmp_Lt, /**< unordered, less or equal */
  pn_Cmp_Ug    = pn_Cmp_Uo|pn_Cmp_Gt,           /**< unordered or greater */
  pn_Cmp_Uge   = pn_Cmp_Uo|pn_Cmp_Eq|pn_Cmp_Gt, /**< unordered, greater or equal */
  pn_Cmp_Ne    = pn_Cmp_Uo|pn_Cmp_Lt|pn_Cmp_Gt, /**< unordered, less or greater = not equal */
  pn_Cmp_True  = 15                             /**< true */
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  /* not_mask = Leg*/   /* bits to flip to negate comparison * @@ hack for jni interface */
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} pn_Cmp;   /* Projection numbers for Cmp */
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/* #define not_mask pn_Cmp_Leg */
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/** returns the pnc name from an pnc constant */
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const char *get_pnc_string(int pnc);
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/** Calculates the negated pnc condition. */
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int         get_negated_pnc(int pnc);
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/** Calculates the swapped pnc condition, i.e., "<" --> ">" */
int         get_swapped_pnc(int pnc);

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ir_node *get_Cmp_left (ir_node *node);
void     set_Cmp_left (ir_node *node, ir_node *left);
ir_node *get_Cmp_right (ir_node *node);
void     set_Cmp_right (ir_node *node, ir_node *right);
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ir_node *get_Shl_left (ir_node *node);
void     set_Shl_left (ir_node *node, ir_node *left);
ir_node *get_Shl_right (ir_node *node);
void     set_Shl_right (ir_node *node, ir_node *right);
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ir_node *get_Shr_left (ir_node *node);
void     set_Shr_left (ir_node *node, ir_node *left);
ir_node *get_Shr_right (ir_node *node);
void     set_Shr_right (ir_node *node, ir_node *right);
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ir_node *get_Shrs_left (ir_node *node);
void     set_Shrs_left (ir_node *node, ir_node *left);
ir_node *get_Shrs_right (ir_node *node);
void     set_Shrs_right (ir_node *node, ir_node *right);
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ir_node *get_Rot_left (ir_node *node);
void     set_Rot_left (ir_node *node, ir_node *left);
ir_node *get_Rot_right (ir_node *node);
void     set_Rot_right (ir_node *node, ir_node *right);
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ir_node *get_Conv_op (ir_node *node);
void     set_Conv_op (ir_node *node, ir_node *op);
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/* Does Cast need a mem operator?
 * Cast should only depend on the type, not on the state of an
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 * entity.  But:  we initialize various fields after Alloc, that
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 * are accessed in the cast.  This required some precaution, to
 * get the right memory into the Loads generated from the cast.
 */
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ir_node *get_Cast_op (ir_node *node);
void     set_Cast_op (ir_node *node, ir_node *op);
type    *get_Cast_type (ir_node *node);
void     set_Cast_type (ir_node *node, type *to_tp);
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/** Checks for upcast.
 *
 * Returns true if the Cast node casts a class type to a super type.
 * Works also for pointers to classes (recursively).
 */
int is_Cast_upcast(ir_node *node);

/** Checks for downcast.
 *
 * Returns true if the Cast node casts a class type to a sub type.
 * Works also for pointers to classes (recursively).
 */
int is_Cast_downcast(ir_node *node);


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/** Returns true if n is Phi or Filter in interprocedural_view.
   Returns false if irg in phase building and the Phi has zero
   predecessors: it's a Phi0. */
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int       is_Phi (const ir_node *n);
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/** Returns true  if irg in phase building and the Phi has zero
   predecessors: it's a Phi0. */
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int       is_Phi0 (const ir_node *n);
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/* These routines also work for Filter nodes in interprocedural view. */
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ir_node **get_Phi_preds_arr (ir_node *node);
int       get_Phi_n_preds (ir_node *node);
ir_node  *get_Phi_pred (ir_node *node, int pos);
void      set_Phi_pred (ir_node *node, int pos, ir_node *pred);

ir_node  *get_Filter_pred(ir_node *node);
void      set_Filter_pred(ir_node *node, ir_node *pred);
long      get_Filter_proj(ir_node *node);
void      set_Filter_proj(ir_node *node, long proj);
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/* set the interprocedural predecessors, ...d_arr uses current_ir_graph.
 * @@@ Maybe better:  arity is zero if no cg preds. */
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void     set_Filter_cg_pred_arr(ir_node * node, int arity, ir_node ** in);
void     set_Filter_cg_pred(ir_node * node, int pos, ir_node * pred);
int      get_Filter_n_cg_preds(ir_node *node);
ir_node *get_Filter_cg_pred(ir_node *node, int pos);
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/** Return true if parameter is a memory operation.
 *
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 *  A memory operation is an operation that changes the
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 *  memory.  I.e., a Load or a Store operation.
 */
int is_memop(ir_node *node);
ir_node *get_memop_mem (ir_node *node);
void     set_memop_mem (ir_node *node, ir_node *mem);
ir_node *get_memop_ptr (ir_node *node);
void     set_memop_ptr (ir_node *node, ir_node *ptr);

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/**
 * Projection numbers for Load: use for Proj nodes!
 */
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typedef enum {
  pn_Load_M,         /**< Memory result.    */
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  pn_Load_X_except,  /**< Execution result if exception occurred. */
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  pn_Load_res,       /**< Result of load operation. */
  pn_Load_max        /**< number of projections from a Load */
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} pn_Load;  /* Projection numbers for Load. */

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ir_node       *get_Load_mem (ir_node *node);
void           set_Load_mem (ir_node *node, ir_node *mem);
ir_node       *get_Load_ptr (ir_node *node);
void           set_Load_ptr (ir_node *node, ir_node *ptr);
ir_mode       *get_Load_mode (ir_node *node);
void           set_Load_mode (ir_node *node, ir_mode *mode);
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ent_volatility get_Load_volatility (ir_node *node);
void           set_Load_volatility (ir_node *node, ent_volatility volatility);
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/**
 * Projection numbers for Store: use for Proj nodes!
 */
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typedef enum {
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  pn_Store_M,         /**< Memory result.    */
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  pn_Store_X_except,  /**< Execution result if exception occurred. */
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  pn_Store_max        /**< number of projections from a Store */
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} pn_Store;  /* Projection numbers for Store. */

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ir_node       *get_Store_mem (ir_node *node);
void           set_Store_mem (ir_node *node, ir_node *mem);
ir_node       *get_Store_ptr (ir_node *node);
void           set_Store_ptr (ir_node *node, ir_node *ptr);
ir_node       *get_Store_value (ir_node *node);
void           set_Store_value (ir_node *node, ir_node *value);
ent_volatility get_Store_volatility (ir_node *node);
void           set_Store_volatility (ir_node *node, ent_volatility volatility);
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/**
 * Projection numbers for Alloc: use for Proj nodes!
 */
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typedef enum {
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  pn_Alloc_M,          /**< Memory result. */
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  pn_Alloc_X_except,  /**< Execution result if exception occurred. */
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  pn_Alloc_res,       /**< Result of allocation. */
  pn_Alloc_max        /**< number of projections from an Alloc */
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} pn_Alloc;  /* Projection numbers for Alloc. */

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ir_node *get_Alloc_mem (ir_node *node);
void     set_Alloc_mem (ir_node *node, ir_node *mem);
ir_node *get_Alloc_size (ir_node *node);
void     set_Alloc_size (ir_node *node, ir_node *size);
type    *get_Alloc_type (ir_node *node);
void     set_Alloc_type (ir_node *node, type *tp);
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/** The allocation place. */
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typedef enum {
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  stack_alloc,          /**< Alloc allocates the object on the stack. */
  heap_alloc            /**< Alloc allocates the object on the heap. */
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} where_alloc;
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where_alloc  get_Alloc_where (ir_node *node);
void         set_Alloc_where (ir_node *node, where_alloc where);

ir_node *get_Free_mem (ir_node *node);
void     set_Free_mem (ir_node *node, ir_node *mem);
ir_node *get_Free_ptr (ir_node *node);
void     set_Free_ptr (ir_node *node, ir_node *ptr);
ir_node *get_Free_size (ir_node *node);
void     set_Free_size (ir_node *node, ir_node *size);
type    *get_Free_type (ir_node *node);
void     set_Free_type (ir_node *node, type *tp);

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where_alloc  get_Free_where (ir_node *node);
void         set_Free_where (ir_node *node, where_alloc where);

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ir_node **get_Sync_preds_arr (ir_node *node);
int       get_Sync_n_preds (ir_node *node);
ir_node  *get_Sync_pred (ir_node *node, int pos);
void      set_Sync_pred (ir_node *node, int pos, ir_node *pred);

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/** Returns the source language type of a Proj node.
 * Must be an atomic type.  Mode of type must be mode of node.
 */
type     *get_Proj_type (ir_node *node);

/** Return the predecessor of a Proj node. */
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ir_node  *get_Proj_pred (ir_node *node);
void      set_Proj_pred (ir_node *node, ir_node *pred);
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/** Return the projection number of a Proj node. */
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long      get_Proj_proj (ir_node *node);
void      set_Proj_proj (ir_node *node, long proj);
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ir_node **get_Tuple_preds_arr (ir_node *node);
int       get_Tuple_n_preds (ir_node *node);
ir_node  *get_Tuple_pred (ir_node *node, int pos);
void      set_Tuple_pred (ir_node *node, int pos, ir_node *pred);
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ir_node  *get_Id_pred (ir_node *node);
void      set_Id_pred (ir_node *node, ir_node *pred);
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/** Confirm has a single result and returns 'value' unchanged.
 *  The node expresses a restriction on 'value':
 *  'value' 'cmp' 'bound' == true.                                 */
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ir_node *get_Confirm_value (ir_node *node);
void     set_Confirm_value (ir_node *node, ir_node *value);
ir_node *get_Confirm_bound (ir_node *node);
void     set_Confirm_bound (ir_node *node, ir_node *bound);
pn_Cmp   get_Confirm_cmp   (ir_node *node);
void     set_Confirm_cmp   (ir_node *node, pn_Cmp cmp);
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ir_node *get_Mux_sel   (ir_node *node);
void     set_Mux_sel   (ir_node *node, ir_node *sel);
ir_node *get_Mux_false (ir_node *node);
void     set_Mux_false (ir_node *node, ir_node *ir_false);
ir_node *get_Mux_true  (ir_node *node);
void     set_Mux_true  (ir_node *node, ir_node *ir_true);


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/*
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 *
 * NAME Auxiliary routines
 *
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 *  Not properly documented ;-)
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 *
 */
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/** returns operand of node if node is a Proj. */
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ir_node *skip_Proj (ir_node *node);
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/** returns operand of node if node is a Id */
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ir_node *skip_Id  (ir_node *node);   /* Same as skip_nop. */
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/* returns corresponding operand of Tuple if node is a Proj from
   a Tuple. */
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ir_node *skip_Tuple (ir_node *node);
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/** returns operand of node if node is a Cast */
ir_node *skip_Cast  (ir_node *node);
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/** returns operand of node if node is a Confirm */
ir_node *skip_Confirm  (ir_node *node);
/** Skip all high-level Operations. */
ir_node *skip_HighLevel(ir_node *node);
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/** returns true if irn is a Const node. */
int			 is_Const(const ir_node *node);
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/** returns true if node is a Bad node. */
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int      is_Bad    (const ir_node *node);
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/** returns true if the node is not a Block */
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int      is_no_Block (const ir_node *node);
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/** returns true if the node is a Block */
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int      is_Block (const ir_node *node);
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/** returns true if node is a Unknown node. */
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int      is_Unknown (const ir_node *node);
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/** returns true if node is a Proj node or a Filter node in
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 * intraprocedural view */
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int      is_Proj (const ir_node *node);
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/** Returns true if the operation manipulates control flow:
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   Start, End, Jmp, Cond, Return, Raise, Bad, CallBegin, EndReg, EndExcept */
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int is_cfop(const ir_node *node);
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/** Returns true if the operation manipulates interprocedural control flow:
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    CallBegin, EndReg, EndExcept */
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int is_ip_cfop(const ir_node *node);
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/** Returns true if the operation can change the control flow because
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    of an exception: Call, Quot, DivMod, Div, Mod, Load, Store, Alloc,
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    Bad. Raise is not fragile, but a unconditional jump. */
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int is_fragile_op(const ir_node *node);
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/** Returns the memory operand of fragile operations. */
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ir_node *get_fragile_op_mem(ir_node *node);
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/** Returns true if the operation is a forking control flow
 *  operation: Cond. */
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int is_forking_op(const ir_node *node);
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/** Return the type associated with the value produced by n
 *  if the node remarks this type as it is the case for
 *  Cast, Const, SymConst and some Proj nodes. */
type *get_irn_type(ir_node *n);

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/**
 * Access custom node data.
 * The data must have been registered with
 * register_additional_node_data() before.
 * @param node The ir node to get the data from.
 * @param type The type of the data you registered.
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 * @param off The value returned by register_additional_node_data().
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 * @return A pointer of type @p type.
 */
#define get_irn_data(node,type,off) \
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  (assert(off > 0 && "Invalid node data offset"), (type *) ((char *) (node) - (off)))

/**
 * Get the pointer to the node some custom data belongs to.
 * @param data The pointer to the custom data.
 * @param off The number as returned by register_additional_node_data().
 * @return A pointer to the ir node the custom data belongs to.
 */
#define get_irn_data_base(data,off) \
  (assert(off > 0 && "Invalid node data offset"), (ir_node *) ((char *) (data) + (off)))
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/**
 * Request additional data to be allocated with an ir node.
 * @param size The size of the additional data required.
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 * @return A positive number, if the operation was successful, which
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 * must be passed to the access macro get_irn_data(), 0 if the
 * registration failed.
 */
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unsigned register_additional_node_data(unsigned size);
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/*-----------------------------------------------------------------*/
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/** Debug aides                                                   **/
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/*-----------------------------------------------------------------*/
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/** Debug print the node.
 *
 *  Writes the node, all its attributes and the predecessors to stdout if DEBUG_libfirm
 *  is set.  Else does nothing. */
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