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[libfirm] / ir / ir / irnode.c

/* Copyright (C) 1998 - 2000 by Universitaet Karlsruhe
** All rights reserved.
**
** Authors: Martin Trapp, Christian Schaefer, Goetz Lindenmaier
**
*/

#include "irnode_t.h"
#include "irgraph_t.h"
#include "ident_t.h"
#include "array.h"

#ifdef DEBUG_libfirm
#include "irprog.h"
#endif

/* some constants fixing the positions of nodes predecessors
   in the in array */
#define CALL_PARAM_OFFSET 2
#define SEL_INDEX_OFFSET 2
#define RETURN_RESULT_OFFSET 1  /* mem is not a result */

static char *pnc_name_arr [] = {"False", "Eq", "Lt", "Le",
                                "Gt", "Ge", "Lg", "Leg", "Uo",
                                "Ue", "Ul", "Ule", "Ug", "Uge",
                                "Ne", "True" };

inline char *get_pnc_string(int pnc) {
  return pnc_name_arr[pnc];
}


int
get_negated_pnc(int pnc) {
  switch (pnc) {
  case False: return True;  break;
  case Eq:    return Ne;    break;
  case Lt:    return Uge;   break;
  case Le:    return Ug;    break;
  case Gt:    return Ule;   break;
  case Ge:    return Ul;    break;
  case Lg:    return Ue;    break;
  case Leg:   return Uo;    break;
  case Uo:    return Leg;   break;
  case Ue:    return Lg;    break;
  case Ul:    return Ge;    break;
  case Ule:   return Gt;    break;
  case Ug:    return Le;    break;
  case Uge:   return Lt;    break;
  case Ne:    return Eq;    break;
  case True:  return False; break;
  }
  return 99; /* to shut up gcc */
}

static char *pns_name_arr [] = {"initial_exec", "global_store",
                                "frame_base", "globals", "args"};

static char *symconst_name_arr [] = {"type_tag", "size", "linkage_ptr_info"};

void
init_irnode (void)
{
}

/* irnode constructor                                             */
/* create a new irnode in irg, with an op, mode, arity and        */
/* some incoming irnodes                                          */
/* this constructor is used in every specified irnode constructor */
inline ir_node *
new_ir_node (ir_graph *irg, ir_node *block, ir_op *op, ir_mode *mode,
             int arity, ir_node **in)
{
  ir_node *res;
  int node_size = offsetof (ir_node, attr) +  op->attr_size;

  res = (ir_node *) obstack_alloc (irg->obst, node_size);

  res->kind = k_ir_node;
  res->op = op;
  res->mode = mode;
  res->visited = 0;
  res->link = NULL;
  if (arity < 0) {
    res->in = NEW_ARR_F (ir_node *, 1);
  } else {
    res->in = NEW_ARR_D (ir_node *, irg->obst, (arity+1));
    memcpy (&res->in[1], in, sizeof (ir_node *) * arity);
  }
  res->in[0] = block;

#ifdef DEBUG_libfirm
  res->node_nr = get_irp_new_node_nr();
#endif

  return res;
}

/* Copies all attributes stored in the old node to the new node.
   Assumes both have the same opcode and sufficient size. */
void
copy_attrs (ir_node *old, ir_node *new) {
  assert (get_irn_opcode(old) == get_irn_opcode(new));
  memcpy (&new->attr, &old->attr, get_op_attr_size(get_irn_op(old)));
}

/* IR-Nodes with attributes */
int
ir_node_print (XP_PAR1, const xprintf_info *info ATTRIBUTE((unused)), XP_PARN)
{
  int printed = 0;
  ir_node *np = XP_GETARG (ir_node *, 0);

  if (!np) {
    XPS ("<null ir_node>");
    return printed;
  }

  XPF1 ("%I", get_irn_opname(np));

  switch (get_irn_opcode (np)) {        /* node label */
  case iro_Const:
    XPF1 ("%I", get_irn_mode(np)->name);
    XPS (" : ");
    XPF1 ("%v", get_irn_const_attr);
    break;
  case iro_Proj:
    if (get_irn_modecode (np) == irm_b) {
      XPC (" ");
      XP (pnc_name_arr[get_irn_proj_attr(np)]);
    } else if (get_irn_opcode (get_irn_in (np)[1]) == iro_Start) {
      XPC (" ");
      XP (pns_name_arr[get_irn_proj_attr(np)]);
    } else {
      XPF1 ("%I", get_irn_mode(np)->name);
      XPC (" ");
      XPF1 ("%d", get_irn_proj_attr(np));
    }
    break;
  case iro_SymConst:
    XPF1 ("%I", get_irn_mode(np)->name);
    XPC  (" ");
    XP   (symconst_name_arr[get_irn_symconst_attr(np).num]);
    XPF1 (" %#N", get_class_ident((type_class *)get_SymConst_type(np)));
    break;
  case iro_Start:               /* don't dump mode of these */
  case iro_Cond:
  case iro_Block:
  case iro_Call:
  case iro_Jmp:
  case iro_Return:
  case iro_End:
    break;
  default:
    XPF1 ("%I", get_irn_mode(np)->name);
  }

  return printed;
}


/** getting some parameters from ir_nodes **/

/* returns the number of predecessors without the block predecessor. */
inline int
get_irn_arity (ir_node *node)
{
  assert(node);
  return (ARR_LEN((node)->in)-1);
}

/* Returns the array with ins. This array is shifted with respect to the
   array accessed by get_irn_n: The block operand is at position 0 not -1.
   (@@@ This should be changed.)
   The order of the predecessors in this array is not guaranteed, except that
   lists of operands as predecessors of Block or arguments of a Call are
   consecutive. */
inline ir_node **
get_irn_in (ir_node *node)
{
  assert (node);
  return ((node)->in);
}

/* to iterate through the predecessors without touching the array */
/* To iterate over the operands iterate from 0 to i < get_irn_arity(),
   to iterate includind the Block predecessor iterate from i = -1 to
   i < get_irn_arity.
   If it is a block, the entry -1 is NULL. */
inline ir_node *
get_irn_n (ir_node *node, int n)
{
  assert (node);
  assert (get_irn_arity (node) > n);
  return skip_nop(node->in[n+1]);
}

inline void
set_irn_n (ir_node *node, int n, ir_node *in)
{
  assert (node);
  assert (get_irn_arity (node) > n);
  node->in[n+1] = in;
}

inline ir_mode *
get_irn_mode (ir_node *node)
{
  assert (node);
  return node->mode;
}

inline modecode
get_irn_modecode (ir_node *node)
{
  assert (node);
  return node->mode->code;
}


inline ident *
get_irn_modename (ir_node *node)
{
  assert(node);
  return node->mode->name;
}

inline ir_op *
get_irn_op (ir_node *node)
{
  assert (node);
  return node->op;
}

/* should be private to the library: */
inline void
set_irn_op (ir_node *node, ir_op *op)
{
  assert (node);
  node->op = op;
}

inline opcode
get_irn_opcode (ir_node *node)
{
  assert (node);
  return node->op->code;
}

inline ident *
get_irn_opname (ir_node *node)
{
  assert(node);
  return node->op->name;
}

inline unsigned long
get_irn_visited (ir_node *node)
{
  assert (node);
  return node->visited;
}

inline void
set_irn_visited (ir_node *node, unsigned long visited)
{
  assert (node);
  node->visited = visited;
}
inline void
set_irn_link (ir_node *node, ir_node *link) {
  assert (node);
  node->link = link;
}

inline ir_node *
get_irn_link (ir_node *node) {
  assert (node);
  return node->link;
}

#ifdef DEBUG_libfirm
/* Outputs a unique number for this node */
inline long
get_irn_node_nr(ir_node *node) {
  assert(node);
  return node->node_nr;
}
#endif

inline tarval *
get_irn_const_attr (ir_node *node)
{
  assert (node->op == op_Const);
  return node->attr.con;
}

inline long
get_irn_proj_attr (ir_node *node)
{
  assert (node->op == op_Proj);
  return node->attr.proj;
}

inline alloc_attr
get_irn_alloc_attr (ir_node *node)
{
  assert (node->op == op_Alloc);
  return node->attr.a;
}

inline type *
get_irn_free_attr     (ir_node *node)
{
  assert (node->op == op_Free);
  return node->attr.f;
}

inline symconst_attr
get_irn_symconst_attr (ir_node *node)
{
  assert (node->op == op_SymConst);
  return node->attr.i;
}

inline type_method *
get_irn_call_attr (ir_node *node)
{
  assert (node->op == op_Call);
  return node->attr.call;
}

inline sel_attr
get_irn_sel_attr (ir_node *node)
{
  assert (node->op == op_Sel);
  return node->attr.s;
}

inline int
get_irn_phi_attr (ir_node *node)
{
  assert (node->op == op_Phi);
  return node->attr.phi0_pos;
}

inline block_attr
get_irn_block_attr (ir_node *node)
{
  assert (node->op == op_Block);
  return node->attr.block;
}

/** manipulate fields of individual nodes **/

/* this works for all except Block */
ir_node *
get_nodes_Block (ir_node *node) {
  assert (!(node->op == op_Block));
  return get_irn_n(node, -1);
}

inline void
set_nodes_Block (ir_node *node, ir_node *block) {
  assert (!(node->op == op_Block));
  set_irn_n(node, -1, block);
}

/* Returns an array with the predecessors of the Block. Depending on
   the implementation of the graph datastructure this can be a copy of
   the internal representation of predecessors as well as the internal
   array itself. Therefore writing to this array might obstruct the ir. */
inline ir_node **
get_Block_cfgpred_arr (ir_node *node)
{
  assert ((node->op == op_Block));
  return (ir_node **)&(get_irn_in(node)[1]);
}


inline int
get_Block_n_cfgpreds (ir_node *node) {
  assert ((node->op == op_Block));
  return (get_irn_arity(node));
}

/*
inline void
set_Block_n_cfgpreds (ir_node *node, int n_preds) {
  assert ((node->op == op_Block));
}
*/

inline ir_node *
get_Block_cfgpred (ir_node *node, int pos) {
  assert (node->op == op_Block);
  return get_irn_n(node, pos);
}

inline void
set_Block_cfgpred (ir_node *node, int pos, ir_node *pred) {
  assert (node->op == op_Block);
  set_irn_n(node, pos, pred);
}

inline bool
get_Block_matured (ir_node *node) {
  assert (node->op == op_Block);
  return node->attr.block.matured;
}

inline void
set_Block_matured (ir_node *node, bool matured) {
  assert (node->op == op_Block);
  node->attr.block.matured = matured;
}
inline unsigned long
get_Block_block_visited (ir_node *node) {
  assert (node->op == op_Block);
  return node->attr.block.block_visited;
}

inline void
set_Block_block_visited (ir_node *node, unsigned long visit) {
  assert (node->op == op_Block);
  node->attr.block.block_visited = visit;
}

inline ir_node *
get_Block_graph_arr (ir_node *node, int pos) {
  assert (node->op == op_Block);
  return node->attr.block.graph_arr[pos+1];
}

inline void
set_Block_graph_arr (ir_node *node, int pos, ir_node *value) {
  assert (node->op == op_Block);
  node->attr.block.graph_arr[pos+1] = value;
}

inline ir_node *
get_Cond_selector (ir_node *node) {
  assert (node->op == op_Cond);
  return get_irn_n(node, 0);
}

inline void
set_Cond_selector (ir_node *node, ir_node *selector) {
  assert (node->op == op_Cond);
  set_irn_n(node, 0, selector);
}

inline ir_node *
get_Return_mem (ir_node *node) {
  assert (node->op == op_Return);
  return get_irn_n(node, 0);
}

inline void
set_Return_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_Return);
  set_irn_n(node, 0, mem);
}

inline ir_node **
get_Return_res_arr (ir_node *node)
{
  assert ((node->op == op_Return));
  if (get_Return_n_res(node) > 0)
    return (ir_node **)&(get_irn_in(node)[1 + RETURN_RESULT_OFFSET]);
  else
    return NULL;
}

inline int
get_Return_n_res (ir_node *node) {
  assert (node->op == op_Return);
  return (get_irn_arity(node) - RETURN_RESULT_OFFSET);
}

/*
inline void
set_Return_n_res (ir_node *node, int results) {
  assert (node->op == op_Return);
}
*/

inline ir_node *
get_Return_res (ir_node *node, int pos) {
  assert (node->op == op_Return);
  assert (get_Return_n_res(node) > pos);
  return get_irn_n(node, pos + RETURN_RESULT_OFFSET);
}

inline void
set_Return_res (ir_node *node, int pos, ir_node *res){
  assert (node->op == op_Return);
  set_irn_n(node, pos + RETURN_RESULT_OFFSET, res);
}

inline ir_node *
get_Raise_mem (ir_node *node) {
  assert (node->op == op_Return);
  return get_irn_n(node, 0);
}

inline void
set_Raise_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_Raise);
  set_irn_n(node, 0, mem);
}

inline ir_node *
get_Raise_exo_ptr (ir_node *node) {
  assert (node->op == op_Raise);
  return get_irn_n(node, 1);
}

inline void
set_Raise_exo_ptr (ir_node *node, ir_node *exo_ptr) {
  assert (node->op == op_Raise);
  set_irn_n(node, 1, exo_ptr);
}

inline tarval *get_Const_tarval (ir_node *node) {
  assert (node->op == op_Const);
  return get_irn_const_attr(node);
}

inline void
set_Const_tarval (ir_node *node, tarval *con) {
  assert (node->op == op_Const);
  node->attr.con = con;
}

inline symconst_kind
get_SymConst_kind (ir_node *node) {
  assert (node->op == op_SymConst);
  return node->attr.i.num;
}

inline void
set_SymConst_kind (ir_node *node, symconst_kind num) {
  assert (node->op == op_SymConst);
  node->attr.i.num = num;
}

inline type *
get_SymConst_type (ir_node *node) {
  assert (   (node->op == op_SymConst)
          && (   get_SymConst_kind(node) == type_tag
              || get_SymConst_kind(node) == size));
  return node->attr.i.tori.typ;
}

inline void
set_SymConst_type (ir_node *node, type *type) {
  assert (   (node->op == op_SymConst)
          && (   get_SymConst_kind(node) == type_tag
              || get_SymConst_kind(node) == size));
  node->attr.i.tori.typ = type;
}

inline ident *
get_SymConst_ptrinfo (ir_node *node) {
  assert (   (node->op == op_SymConst)
          && (get_SymConst_kind(node) == linkage_ptr_info));
  return node->attr.i.tori.ptrinfo;


}

inline void
set_SymConst_ptrinfo (ir_node *node, ident *ptrinfo) {
  assert (   (node->op == op_SymConst)
          && (get_SymConst_kind(node) == linkage_ptr_info));
  node->attr.i.tori.ptrinfo = ptrinfo;
}

inline ir_node *
get_Sel_mem (ir_node *node) {
  assert (node->op == op_Sel);
  return get_irn_n(node, 0);
}

inline void
set_Sel_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_Sel);
  set_irn_n(node, 0, mem);
}

inline ir_node *
get_Sel_ptr (ir_node *node) {
  assert (node->op == op_Sel);
  return get_irn_n(node, 1);
}

inline void
set_Sel_ptr (ir_node *node, ir_node *ptr) {
  assert (node->op == op_Sel);
  set_irn_n(node, 1, ptr);
}

inline ir_node **
get_Sel_index_arr (ir_node *node)
{
  assert ((node->op == op_Sel));
  if (get_Sel_n_index(node) > 0)
    return (ir_node **)& get_irn_in(node)[SEL_INDEX_OFFSET + 1];
  else
    return NULL;
}

inline int
get_Sel_n_index (ir_node *node) {
  assert (node->op == op_Sel);
  return (get_irn_arity(node) - SEL_INDEX_OFFSET);
}

/*
inline void
set_Sel_n_index (ir_node *node, int n_index) {
  assert (node->op == op_Sel);
}
*/

inline ir_node *
get_Sel_index (ir_node *node, int pos) {
  assert (node->op == op_Sel);
  return get_irn_n(node, pos + SEL_INDEX_OFFSET);
}

inline void
set_Sel_index (ir_node *node, int pos, ir_node *index) {
  assert (node->op == op_Sel);
  set_irn_n(node, pos + SEL_INDEX_OFFSET, index);
}

inline entity *
get_Sel_entity (ir_node *node) {
  assert (node->op == op_Sel);
  return node->attr.s.ent;
}

inline void
set_Sel_entity (ir_node *node, entity *ent) {
  assert (node->op == op_Sel);
  node->attr.s.ent = ent;
}

inline linkage_type
get_Sel_linkage_type (ir_node *node) {
  assert (node->op == op_Sel);
  return node->attr.s.ltyp;
}

inline void
set_Sel_linkage_type (ir_node *node, linkage_type lt) {
  assert (node->op == op_Sel);
  node->attr.s.ltyp = lt;
}

inline ir_node *
get_Call_mem (ir_node *node) {
  assert (node->op == op_Call);
  return get_irn_n(node, 0);
}

inline void
set_Call_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_Call);
  set_irn_n(node, 0, mem);
}

inline ir_node *
get_Call_ptr (ir_node *node) {
  assert (node->op == op_Call);
  return get_irn_n(node, 1);
}

inline void
set_Call_ptr (ir_node *node, ir_node *ptr) {
  assert (node->op == op_Call);
  set_irn_n(node, 1, ptr);
}

inline ir_node **
get_Call_param_arr (ir_node *node) {
  assert (node->op == op_Call);
  return (ir_node **)&get_irn_in(node)[CALL_PARAM_OFFSET + 1];
}

inline int
get_Call_arity (ir_node *node) {
  assert (node->op == op_Call);
  return (get_irn_arity(node) - CALL_PARAM_OFFSET);
}

/* inline void
set_Call_arity (ir_node *node, ir_node *arity) {
  assert (node->op == op_Call);
}
*/

inline ir_node *
get_Call_param (ir_node *node, int pos) {
  assert (node->op == op_Call);
  return get_irn_n(node, pos + CALL_PARAM_OFFSET);
}

inline void
set_Call_param (ir_node *node, int pos, ir_node *param) {
  assert (node->op == op_Call);
  set_irn_n(node, pos + CALL_PARAM_OFFSET, param);
}

inline type_method *
get_Call_type (ir_node *node) {
  assert (node->op == op_Call);
  return node->attr.call;
}

inline void
set_Call_type (ir_node *node, type_method *type) {
  assert (node->op == op_Call);
  node->attr.call = type;
}

/* 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 0999-33.
   unops are: Minus, Abs, Not, Conv
   binops are: Add, Sub, Mul, Quot, DivMod, Div, Mod, And, Or, Eor, Shl,
   Shr, Shrs, Rotate, Cmp */

int
is_unop (ir_node *node) {
  return ( node->op == op_Minus ||
           node->op == op_Abs  ||
           node->op == op_Not  ||
           node->op == op_Conv );
}

inline ir_node *
get_unop_op (ir_node *node) {
  assert ( node->op == op_Minus ||
           node->op == op_Abs  ||
            node->op == op_Not  ||
           node->op == op_Conv );
  switch (get_irn_opcode (node)) {
    case iro_Minus: return get_Minus_op(node); break;
    case iro_Abs:   return get_Abs_op(node);   break;
    case iro_Not:   return get_Not_op(node);   break;
    case iro_Conv:  return get_Conv_op(node);  break;
    default: return NULL;
  }
}

inline void
set_unop_op (ir_node *node, ir_node *op) {
    assert (node->op == op_Minus ||
            node->op == op_Abs   ||
            node->op == op_Not   ||
            node->op == op_Conv    );
    switch (get_irn_opcode (node)) {
    case iro_Minus:   set_Minus_op(node, op); break;
    case iro_Abs:     set_Abs_op(node, op);   break;
    case iro_Not:     set_Not_op(node, op);   break;
    case iro_Conv:    set_Conv_op(node, op);  break;
    default:  ;
    }

}

int
is_binop (ir_node *node) {
  return (node->op == op_Add    ||
          node->op == op_Sub    ||
          node->op == op_Mul    ||
          node->op == op_Quot   ||
          node->op == op_DivMod ||
          node->op == op_Div    ||
          node->op == op_Mod    ||
          node->op == op_And    ||
          node->op == op_Or     ||
          node->op == op_Eor    ||
          node->op == op_Shl    ||
          node->op == op_Shr    ||
          node->op == op_Shrs   ||
          node->op == op_Rot    ||
          node->op == op_Cmp      );
}

inline ir_node *
get_binop_left (ir_node *node) {
  assert (node->op == op_Add    ||
          node->op == op_Sub    ||
          node->op == op_Mul    ||
          node->op == op_Quot   ||
          node->op == op_DivMod ||
          node->op == op_Div    ||
          node->op == op_Mod    ||
          node->op == op_And    ||
          node->op == op_Or     ||
          node->op == op_Eor    ||
          node->op == op_Shl    ||
          node->op == op_Shr    ||
          node->op == op_Shrs   ||
          node->op == op_Rot    ||
          node->op == op_Cmp      );

    switch (get_irn_opcode (node)) {
      case iro_Add   :     return get_Add_left(node);  break;
      case iro_Sub   :     return get_Sub_left(node);  break;
      case iro_Mul   :     return get_Mul_left(node);  break;
      case iro_Quot  :     return get_Quot_left(node); break;
      case iro_DivMod:     return get_DivMod_left(node);  break;
      case iro_Div   :     return get_Div_left(node);  break;
      case iro_Mod   :     return get_Mod_left(node);  break;
      case iro_And   :     return get_And_left(node);  break;
      case iro_Or    :     return get_Or_left(node);   break;
      case iro_Eor   :     return get_Eor_left(node);  break;
      case iro_Shl   :     return get_Shl_left(node);  break;
      case iro_Shr   :     return get_Shr_left(node);  break;
      case iro_Shrs  :     return get_Shrs_left(node); break;
      case iro_Rot   :     return get_Rot_left(node);  break;
      case iro_Cmp   :     return get_Cmp_left(node);  break;
    default:  return NULL;
  };
}

inline void
set_binop_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Add    ||
          node->op == op_Sub    ||
          node->op == op_Mul    ||
          node->op == op_Quot   ||
          node->op == op_DivMod ||
          node->op == op_Div    ||
          node->op == op_Mod    ||
          node->op == op_And    ||
          node->op == op_Or     ||
          node->op == op_Eor    ||
          node->op == op_Shl    ||
          node->op == op_Shr    ||
          node->op == op_Shrs   ||
          node->op == op_Rot    ||
          node->op == op_Cmp      );

    switch (get_irn_opcode (node)) {
      case iro_Add   :     set_Add_left(node, left);  break;
      case iro_Sub   :     set_Sub_left(node, left);  break;
      case iro_Mul   :     set_Mul_left(node, left);  break;
      case iro_Quot  :     set_Quot_left(node, left); break;
      case iro_DivMod:     set_DivMod_left(node, left);  break;
      case iro_Div   :     set_Div_left(node, left);  break;
      case iro_Mod   :     set_Mod_left(node, left);  break;
      case iro_And   :     set_And_left(node, left);  break;
      case iro_Or    :     set_Or_left(node, left);   break;
      case iro_Eor   :     set_Eor_left(node, left);  break;
      case iro_Shl   :     set_Shl_left(node, left);  break;
      case iro_Shr   :     set_Shr_left(node, left);  break;
      case iro_Shrs  :     set_Shrs_left(node, left); break;
      case iro_Rot   :     set_Rot_left(node, left);  break;
      case iro_Cmp   :     set_Cmp_left(node, left);  break;
    default:  ;
  };
}

inline ir_node *
get_binop_right (ir_node *node) {
  assert (node->op == op_Add    ||
          node->op == op_Sub    ||
          node->op == op_Mul    ||
          node->op == op_Quot   ||
          node->op == op_DivMod ||
          node->op == op_Div    ||
          node->op == op_Mod    ||
          node->op == op_And    ||
          node->op == op_Or     ||
          node->op == op_Eor    ||
          node->op == op_Shl    ||
          node->op == op_Shr    ||
          node->op == op_Shrs   ||
          node->op == op_Rot    ||
          node->op == op_Cmp      );

    switch (get_irn_opcode (node)) {
      case iro_Add   :     return get_Add_right(node);  break;
      case iro_Sub   :     return get_Sub_right(node);  break;
      case iro_Mul   :     return get_Mul_right(node);  break;
      case iro_Quot  :     return get_Quot_right(node); break;
      case iro_DivMod:     return get_DivMod_right(node);  break;
      case iro_Div   :     return get_Div_right(node);  break;
      case iro_Mod   :     return get_Mod_right(node);  break;
      case iro_And   :     return get_And_right(node);  break;
      case iro_Or    :     return get_Or_right(node);   break;
      case iro_Eor   :     return get_Eor_right(node);  break;
      case iro_Shl   :     return get_Shl_right(node);  break;
      case iro_Shr   :     return get_Shr_right(node);  break;
      case iro_Shrs  :     return get_Shrs_right(node); break;
      case iro_Rot   :     return get_Rot_right(node);  break;
      case iro_Cmp   :     return get_Cmp_right(node);  break;
    default:  return NULL;
  };
}

inline void
set_binop_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Add    ||
          node->op == op_Sub    ||
          node->op == op_Mul    ||
          node->op == op_Quot   ||
          node->op == op_DivMod ||
          node->op == op_Div    ||
          node->op == op_Mod    ||
          node->op == op_And    ||
          node->op == op_Or     ||
          node->op == op_Eor    ||
          node->op == op_Shl    ||
          node->op == op_Shr    ||
          node->op == op_Shrs   ||
          node->op == op_Rot    ||
          node->op == op_Cmp      );

    switch (get_irn_opcode (node)) {
      case iro_Add   :     set_Add_right(node, right);  break;
      case iro_Sub   :     set_Sub_right(node, right);  break;
      case iro_Mul   :     set_Mul_right(node, right);  break;
      case iro_Quot  :     set_Quot_right(node, right); break;
      case iro_DivMod:     set_DivMod_right(node, right);  break;
      case iro_Div   :     set_Div_right(node, right);  break;
      case iro_Mod   :     set_Mod_right(node, right);  break;
      case iro_And   :     set_And_right(node, right);  break;
      case iro_Or    :     set_Or_right(node, right);   break;
      case iro_Eor   :     set_Eor_right(node, right);  break;
      case iro_Shl   :     set_Shl_right(node, right);  break;
      case iro_Shr   :     set_Shr_right(node, right);  break;
      case iro_Shrs  :     set_Shrs_right(node, right); break;
      case iro_Rot   :     set_Rot_right(node, right);  break;
      case iro_Cmp   :     set_Cmp_right(node, right);  break;
    default: ;
  };
}

inline ir_node *
get_Add_left (ir_node *node) {
  assert (node->op == op_Add);
  return get_irn_n(node, 0);
}

inline void
set_Add_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Add);
  set_irn_n(node, 0, left);
}

inline ir_node *
get_Add_right (ir_node *node) {
  assert (node->op == op_Add);
  return get_irn_n(node, 1);
}

inline void
set_Add_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Add);
  set_irn_n(node, 1, right);
}

inline ir_node *
get_Sub_left (ir_node *node) {
  assert (node->op == op_Sub);
  return get_irn_n(node, 0);
}

inline void
set_Sub_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Sub);
  set_irn_n(node, 0, left);
}

inline ir_node *
get_Sub_right (ir_node *node) {
  assert (node->op == op_Sub);
  return get_irn_n(node, 1);
}

inline void
set_Sub_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Sub);
  set_irn_n(node, 1, right);
}


inline ir_node *
get_Minus_op (ir_node *node) {
  assert (node->op == op_Minus);
  return get_irn_n(node, 0);
}

inline void
set_Minus_op (ir_node *node, ir_node *op) {
  assert (node->op == op_Minus);
  set_irn_n(node, 0, op);
}


inline ir_node *
get_Mul_left (ir_node *node) {
  assert (node->op == op_Mul);
  return get_irn_n(node, 0);
}

inline void
set_Mul_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Mul);
  set_irn_n(node, 0, left);
}

inline ir_node *
get_Mul_right (ir_node *node) {
  assert (node->op == op_Mul);
  return get_irn_n(node, 1);
}

inline void
set_Mul_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Mul);
  set_irn_n(node, 1, right);
}

inline ir_node *
get_Quot_left (ir_node *node) {
  assert (node->op == op_Quot);
  return get_irn_n(node, 1);
}

inline void
set_Quot_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Quot);
  set_irn_n(node, 1, left);
}

inline ir_node *
get_Quot_right (ir_node *node) {
  assert (node->op == op_Quot);
  return get_irn_n(node, 2);
}

inline void
set_Quot_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Quot);
  set_irn_n(node, 2, right);
}

inline ir_node *
get_Quot_mem (ir_node *node) {
  assert (node->op == op_Quot);
  return get_irn_n(node, 0);
}

inline void
set_Quot_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_Quot);
  set_irn_n(node, 0, mem);
}

inline ir_node *
get_DivMod_left (ir_node *node) {
  assert (node->op == op_DivMod);
  return get_irn_n(node, 1);
}

inline void
set_DivMod_left (ir_node *node, ir_node *left) {
  assert (node->op == op_DivMod);
  set_irn_n(node, 1, left);
}

inline ir_node *
get_DivMod_right (ir_node *node) {
  assert (node->op == op_DivMod);
  return get_irn_n(node, 2);
}

inline void
set_DivMod_right (ir_node *node, ir_node *right) {
  assert (node->op == op_DivMod);
  set_irn_n(node, 2, right);
}

inline ir_node *
get_DivMod_mem (ir_node *node) {
  assert (node->op == op_DivMod);
  return get_irn_n(node, 0);
}

inline void
set_DivMod_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_DivMod);
  set_irn_n(node, 0, mem);
}

inline ir_node *
get_Div_left (ir_node *node) {
  assert (node->op == op_Div);
  return get_irn_n(node, 1);
}

inline void
set_Div_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Div);
  set_irn_n(node, 1, left);
}

inline ir_node *
get_Div_right (ir_node *node) {
  assert (node->op == op_Div);
  return get_irn_n(node, 2);
}

inline void
set_Div_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Div);
  set_irn_n(node, 2, right);
}

inline ir_node *
get_Div_mem (ir_node *node) {
  assert (node->op == op_Div);
  return get_irn_n(node, 0);
}

inline void
set_Div_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_Div);
  set_irn_n(node, 0, mem);
}

inline ir_node *
get_Mod_left (ir_node *node) {
  assert (node->op == op_Mod);
  return get_irn_n(node, 1);
}

inline void
set_Mod_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Mod);
  set_irn_n(node, 1, left);
}

inline ir_node *
get_Mod_right (ir_node *node) {
  assert (node->op == op_Mod);
  return get_irn_n(node, 2);
}

inline void
set_Mod_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Mod);
  set_irn_n(node, 2, right);
}

inline ir_node *
get_Mod_mem (ir_node *node) {
  assert (node->op == op_Mod);
  return get_irn_n(node, 0);
}

inline void
set_Mod_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_Mod);
  set_irn_n(node, 0, mem);
}

inline ir_node *
get_Abs_op (ir_node *node) {
  assert (node->op == op_Abs);
  return get_irn_n(node, 0);
}

inline void
set_Abs_op (ir_node *node, ir_node *op) {
  assert (node->op == op_Abs);
  set_irn_n(node, 0, op);
}

inline ir_node *
get_And_left (ir_node *node) {
  assert (node->op == op_And);
  return get_irn_n(node, 0);
}

inline void
set_And_left (ir_node *node, ir_node *left) {
  assert (node->op == op_And);
  set_irn_n(node, 0, left);
}

inline ir_node *
get_And_right (ir_node *node) {
  assert (node->op == op_And);
  return get_irn_n(node, 1);
}

inline void
set_And_right (ir_node *node, ir_node *right) {
  assert (node->op == op_And);
  set_irn_n(node, 1, right);
}

inline ir_node *
get_Or_left (ir_node *node) {
  assert (node->op == op_Or);
  return get_irn_n(node, 0);
}

inline void
set_Or_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Or);
  set_irn_n(node, 0, left);
}

inline ir_node *
get_Or_right (ir_node *node) {
  assert (node->op == op_Or);
  return get_irn_n(node, 1);
}

inline void
set_Or_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Or);
  set_irn_n(node, 1, right);
}

inline ir_node *
get_Eor_left (ir_node *node) {
  assert (node->op == op_Eor);
  return get_irn_n(node, 0);
}

inline void
set_Eor_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Eor);
  set_irn_n(node, 0, left);
}

inline ir_node *
get_Eor_right (ir_node *node) {
  assert (node->op == op_Eor);
  return get_irn_n(node, 1);
}

inline void
set_Eor_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Eor);
  set_irn_n(node, 1, right);
}


inline ir_node *
get_Not_op (ir_node *node) {
  assert (node->op == op_Not);
  return get_irn_n(node, 0);
}

inline void
set_Not_op (ir_node *node, ir_node *op) {
  assert (node->op == op_Not);
  set_irn_n(node, 0, op);
}


inline ir_node *
get_Shl_left (ir_node *node) {
  assert (node->op == op_Shl);
  return get_irn_n(node, 0);
}

inline void
set_Shl_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Shl);
  set_irn_n(node, 0, left);
}

inline ir_node *
get_Shl_right (ir_node *node) {
  assert (node->op == op_Shl);
  return get_irn_n(node, 1);
}

inline void
set_Shl_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Shl);
  set_irn_n(node, 1, right);
}

inline ir_node *
get_Shr_left (ir_node *node) {
  assert (node->op == op_Shr);
  return get_irn_n(node, 0);
}

inline void
set_Shr_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Shr);
  set_irn_n(node, 0, left);
}

inline ir_node *
get_Shr_right (ir_node *node) {
  assert (node->op == op_Shr);
  return get_irn_n(node, 1);
}

inline void
set_Shr_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Shr);
  set_irn_n(node, 1, right);
}

inline ir_node *
get_Shrs_left (ir_node *node) {
  assert (node->op == op_Shrs);
  return get_irn_n(node, 0);
}

inline void
set_Shrs_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Shrs);
  set_irn_n(node, 0, left);
}

inline ir_node *
get_Shrs_right (ir_node *node) {
  assert (node->op == op_Shrs);
  return get_irn_n(node, 1);
}

inline void
set_Shrs_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Shrs);
  set_irn_n(node, 1, right);
}

inline ir_node *
get_Rot_left (ir_node *node) {
  assert (node->op == op_Rot);
  return get_irn_n(node, 0);
}

inline void
set_Rot_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Rot);
  set_irn_n(node, 0, left);
}

inline ir_node *
get_Rot_right (ir_node *node) {
  assert (node->op == op_Rot);
  return get_irn_n(node, 1);
}

inline void
set_Rot_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Rot);
  set_irn_n(node, 1, right);
}

inline ir_node *
get_Cmp_left (ir_node *node) {
  assert (node->op == op_Cmp);
  return get_irn_n(node, 0);
}

inline void
set_Cmp_left (ir_node *node, ir_node *left) {
  assert (node->op == op_Cmp);
  set_irn_n(node, 0, left);
}

inline ir_node *
get_Cmp_right (ir_node *node) {
  assert (node->op == op_Cmp);
  return get_irn_n(node, 1);
}

inline void
set_Cmp_right (ir_node *node, ir_node *right) {
  assert (node->op == op_Cmp);
  set_irn_n(node, 1, right);
}

inline ir_node *
get_Conv_op (ir_node *node) {
  assert (node->op == op_Conv);
  return get_irn_n(node, 0);
}

inline void
set_Conv_op (ir_node *node, ir_node *op) {
  assert (node->op == op_Conv);
  set_irn_n(node, 0, op);
}

inline ir_node **
get_Phi_preds_arr (ir_node *node) {
  assert (node->op == op_Phi);
  return (ir_node **)&(get_irn_in(node)[1]);
}

inline int
get_Phi_n_preds (ir_node *node) {
  assert (node->op == op_Phi);
  return (get_irn_arity(node));
}

/*
inline void set_Phi_n_preds (ir_node *node, int n_preds) {
  assert (node->op == op_Phi);
}
*/

inline ir_node *
get_Phi_pred (ir_node *node, int pos) {
  assert (node->op == op_Phi);
  return get_irn_n(node, pos);
}

inline void
set_Phi_pred (ir_node *node, int pos, ir_node *pred) {
  assert (node->op == op_Phi);
  set_irn_n(node, pos, pred);
}

inline ir_node *
get_Load_mem (ir_node *node) {
  assert (node->op == op_Load);
  return get_irn_n(node, 0);
}

inline void
set_Load_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_Load);
  set_irn_n(node, 0, mem);
}

inline ir_node *
get_Load_ptr (ir_node *node) {
  assert (node->op == op_Load);
  return get_irn_n(node, 1);
}

inline void
set_Load_ptr (ir_node *node, ir_node *ptr) {
  assert (node->op == op_Load);
  set_irn_n(node, 1, ptr);
}

inline
ir_node *
get_Store_mem (ir_node *node) {
  assert (node->op == op_Store);
  return get_irn_n(node, 0);
}

inline void
set_Store_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_Store);
  set_irn_n(node, 0, mem);
}

inline ir_node *
get_Store_ptr (ir_node *node) {
  assert (node->op == op_Store);
  return get_irn_n(node, 1);
}

inline void
set_Store_ptr (ir_node *node, ir_node *ptr) {
  assert (node->op == op_Store);
  set_irn_n(node, 1, ptr);
}

inline ir_node *
get_Store_value (ir_node *node) {
  assert (node->op == op_Store);
  return get_irn_n(node, 2);
}

inline void
set_Store_value (ir_node *node, ir_node *value) {
  assert (node->op == op_Store);
  set_irn_n(node, 2, value);
}

inline ir_node *
get_Alloc_mem (ir_node *node) {
  assert (node->op == op_Alloc);
  return get_irn_n(node, 0);
}

inline void
set_Alloc_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_Alloc);
  set_irn_n(node, 0, mem);
}

inline ir_node *
get_Alloc_size (ir_node *node) {
  assert (node->op == op_Alloc);
  return get_irn_n(node, 1);
}

inline void
set_Allco_size (ir_node *node, ir_node *size) {
  assert (node->op == op_Alloc);
  set_irn_n(node, 1, size);
}

inline type  *
get_Alloc_type (ir_node *node) {
  assert (node->op == op_Alloc);
  return node->attr.a.type;
}

inline void
set_Alloc_type (ir_node *node, type *type) {
  assert (node->op == op_Alloc);
  node->attr.a.type = type;
}

inline where_alloc
get_Alloc_where (ir_node *node) {
  assert (node->op == op_Alloc);
  return node->attr.a.where;
}

inline void
set_Alloc_where (ir_node *node, where_alloc where) {
  assert (node->op == op_Alloc);
  node->attr.a.where = where;
}


inline ir_node *
get_Free_mem (ir_node *node) {
  assert (node->op == op_Free);
  return get_irn_n(node, 0);
}

inline void
set_Free_mem (ir_node *node, ir_node *mem) {
  assert (node->op == op_Free);
  set_irn_n(node, 0, mem);
}

inline ir_node *
get_Free_ptr (ir_node *node) {
  assert (node->op == op_Free);
  return get_irn_n(node, 1);
}

inline void
set_Free_ptr (ir_node *node, ir_node *ptr) {
  assert (node->op == op_Free);
  set_irn_n(node, 1, ptr);
}

inline ir_node *
get_Free_size (ir_node *node) {
  assert (node->op == op_Free);
  return get_irn_n(node, 2);
}

inline void
set_Free_size (ir_node *node, ir_node *size) {
  assert (node->op == op_Free);
  set_irn_n(node, 2, size);
}

inline type  *
get_Free_type (ir_node *node) {
  assert (node->op == op_Free);
  return node->attr.f;
}

inline void
set_Free_type (ir_node *node, type *type) {
  assert (node->op == op_Free);
  node->attr.f = type;
}

inline ir_node **
get_Sync_preds_arr (ir_node *node) {
  assert (node->op == op_Sync);
  return (ir_node **)&(get_irn_in(node)[1]);
}

inline int
get_Sync_n_preds (ir_node *node) {
  assert (node->op == op_Sync);
  return (get_irn_arity(node));
}

/*
inline void
set_Sync_n_preds (ir_node *node, int n_preds) {
  assert (node->op == op_Sync);
}
*/

inline ir_node *
get_Sync_pred (ir_node *node, int pos) {
  assert (node->op == op_Sync);
  return get_irn_n(node, pos);
}

inline void
set_Sync_pred (ir_node *node, int pos, ir_node *pred) {
  assert (node->op == op_Sync);
  set_irn_n(node, pos, pred);
}

inline ir_node *
get_Proj_pred (ir_node *node) {
  assert (node->op == op_Proj);
  return get_irn_n(node, 0);
}

inline void
set_Proj_pred (ir_node *node, ir_node *pred) {
  assert (node->op == op_Proj);
  set_irn_n(node, 0, pred);
}

inline long
get_Proj_proj (ir_node *node) {
  assert (node->op == op_Proj);
  return node->attr.proj;
}

inline void
set_Proj_proj (ir_node *node, long proj) {
  assert (node->op == op_Proj);
  node->attr.proj = proj;
}

inline ir_node **
get_Tuple_preds_arr (ir_node *node) {
  assert (node->op == op_Tuple);
  return (ir_node **)&(get_irn_in(node)[1]);
}

inline int
get_Tuple_n_preds (ir_node *node) {
  assert (node->op == op_Tuple);
  return (get_irn_arity(node));
}

/*
inline void
set_Tuple_n_preds (ir_node *node, int n_preds) {
  assert (node->op == op_Tuple);
}
*/

inline ir_node *
get_Tuple_pred (ir_node *node, int pos) {
  assert (node->op == op_Tuple);
  return get_irn_n(node, pos);
}

inline void
set_Tuple_pred (ir_node *node, int pos, ir_node *pred) {
  assert (node->op == op_Tuple);
  set_irn_n(node, pos, pred);
}

inline ir_node *
get_Id_pred (ir_node *node) {
  assert (node->op == op_Id);
  return get_irn_n(node, 0);
}

inline void
set_Id_pred (ir_node *node, ir_node *pred) {
  assert (node->op == op_Id);
  set_irn_n(node, 0, pred);
}

/******************************************************************/
/*  Auxiliary routines                                            */
/******************************************************************/

inline ir_node *
skip_Proj (ir_node *node) {
  /* don't assert node !!! */
  if (node && (node->op == op_Proj)) {
    return get_Proj_pred(node);
  } else {
    return node;
  }
}

inline ir_node *
skip_nop (ir_node *node) {
  /* don't assert node !!! */

  if (node && (node->op == op_Id) && (node != get_Id_pred(node))) {
    return get_Id_pred(node);
  } else {
    return node;
  }
}

inline int
is_Bad (ir_node *node) {
  assert(node);
  if ((node) && get_irn_opcode(node) == iro_Bad)
    return 1;
  return 0;
}

inline int
is_no_Block (ir_node *node) {
  assert(node);
  return (get_irn_opcode(node) != iro_Block);
}

/* Returns true if the operation manipulates control flow. */
int
is_cfop(ir_node *node) {
  return (   (get_irn_opcode(node) == iro_Start)
          || (get_irn_opcode(node) == iro_Jmp)
          || (get_irn_opcode(node) == iro_Cond)
          || (get_irn_opcode(node) == iro_Return)
          || (get_irn_opcode(node) == iro_Raise)
          || (get_irn_opcode(node) == iro_Bad));
}

/* Returns true if the operation can change the control flow because
   of an exception. */
int
is_fragile_op(ir_node *node) {
  return (   (get_irn_opcode(node) == iro_Call)
          || (get_irn_opcode(node) == iro_Quot)
          || (get_irn_opcode(node) == iro_DivMod)
          || (get_irn_opcode(node) == iro_Div)
          || (get_irn_opcode(node) == iro_Mod)
          || (get_irn_opcode(node) == iro_Load)
          || (get_irn_opcode(node) == iro_Store)
          || (get_irn_opcode(node) == iro_Alloc)
          || (get_irn_opcode(node) == iro_Bad));
}