irnode.c 47.3 KB
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/*
 * Project:     libFIRM
 * File name:   ir/ir/irnode.c
 * Purpose:     Representation of an intermediate operation.
 * Author:      Martin Trapp, Christian Schaefer
 * Modified by: Goetz Lindenmaier
 * Created:
 * CVS-ID:      $Id$
 * Copyright:   (c) 1998-2003 Universitt Karlsruhe
 * Licence:     This file protected by GPL -  GNU GENERAL PUBLIC LICENSE.
 */
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#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
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#include <string.h>
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#include "ident.h"
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#include "irnode_t.h"
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#include "irgraph_t.h"
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#include "irmode_t.h"
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#include "typegmod.h"
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#include "irbackedge_t.h"
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#include "irdump.h"
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#include "irop_t.h"
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#include "irprog_t.h"
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#include "firmstat.h"

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/* some constants fixing the positions of nodes predecessors
   in the in array */
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#define CALL_PARAM_OFFSET     2
#define FUNCCALL_PARAM_OFFSET 1
#define SEL_INDEX_OFFSET      2
#define RETURN_RESULT_OFFSET  1  /* mem is not a result */
#define END_KEEPALIVE_OFFSET  0
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static const char *pnc_name_arr [] = {
  "False", "Eq", "Lt", "Le",
  "Gt", "Ge", "Lg", "Leg", "Uo",
  "Ue", "Ul", "Ule", "Ug", "Uge",
  "Ne", "True"
};
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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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  return pnc_name_arr[pnc];
}

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/**
 * Calculates the negated pnc condition.
 */
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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 */
}

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const char *pns_name_arr [] = {
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  "initial_exec", "global_store",
  "frame_base", "globals", "args"
};
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const char *symconst_name_arr [] = {
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  "type_tag", "size", "addr_name", "addr_ent"
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};
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void
init_irnode (void)
{
}

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/*
 * irnode constructor.
 * Create a new irnode in irg, with an op, mode, arity and
 * some incoming irnodes.
 * If arity is negative, a node with a dynamic array is created.
 */
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ir_node *
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new_ir_node (dbg_info *db, ir_graph *irg, ir_node *block, ir_op *op, ir_mode *mode,
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         int arity, ir_node **in)
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{
  ir_node *res;
  int node_size = offsetof (ir_node, attr) +  op->attr_size;

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  assert(irg && op && mode);
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  res = (ir_node *) obstack_alloc (irg->obst, node_size);
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  memset((void *)res, 0, node_size);
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  res->kind = k_ir_node;
  res->op = op;
  res->mode = mode;
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  res->visited = 0;
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  res->link = NULL;
  if (arity < 0) {
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    res->in = NEW_ARR_F (ir_node *, 1);  /* 1: space for block */
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  } 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;
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  set_irn_dbg_info(res, db);
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  res->out = NULL;
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#ifdef DEBUG_libfirm
  res->node_nr = get_irp_new_node_nr();
#endif

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  stat_new_node(res);

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  return res;
}

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/* Copies all attributes stored in the old node to the new node.
   Assumes both have the same opcode and sufficient size. */
void
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copy_attrs (const ir_node *old_node, ir_node *new_node) {
  assert(get_irn_op(old_node) == get_irn_op(new_node));
  memcpy(&new_node->attr, &old_node->attr, get_op_attr_size(get_irn_op(old_node)));
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}
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/*-- getting some parameters from ir_nodes --*/
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int
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(is_ir_node)(const void *thing) {
  return __is_ir_node(thing);
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}

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int
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(get_irn_intra_arity)(const ir_node *node) {
  return __get_irn_intra_arity(node);
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}

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int
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(get_irn_inter_arity)(const ir_node *node) {
  return __get_irn_inter_arity(node);
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}

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int
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(get_irn_arity)(const ir_node *node) {
  return __get_irn_arity(node);
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}

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/* 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. */
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ir_node **
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get_irn_in (const ir_node *node) {
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  assert(node);
  if (interprocedural_view) { /* handle Filter and Block specially */
    if (get_irn_opcode(node) == iro_Filter) {
      assert(node->attr.filter.in_cg);
      return node->attr.filter.in_cg;
    } else if (get_irn_opcode(node) == iro_Block && node->attr.block.in_cg) {
      return node->attr.block.in_cg;
    }
    /* else fall through */
  }
  return node->in;
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}

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void
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set_irn_in (ir_node *node, int arity, ir_node **in) {
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  ir_node *** arr;
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  assert(node);
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  if (interprocedural_view) { /* handle Filter and Block specially */
    if (get_irn_opcode(node) == iro_Filter) {
      assert(node->attr.filter.in_cg);
      arr = &node->attr.filter.in_cg;
    } else if (get_irn_opcode(node) == iro_Block && node->attr.block.in_cg) {
      arr = &node->attr.block.in_cg;
    } else {
      arr = &node->in;
    }
  } else {
    arr = &node->in;
  }
  if (arity != ARR_LEN(*arr) - 1) {
    ir_node * block = (*arr)[0];
    *arr = NEW_ARR_D(ir_node *, current_ir_graph->obst, arity + 1);
    (*arr)[0] = block;
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  }
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  fix_backedges(current_ir_graph->obst, node);
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  memcpy((*arr) + 1, in, sizeof(ir_node *) * arity);
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}

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ir_node *
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(get_irn_intra_n)(ir_node *node, int n) {
  return __get_irn_intra_n (node, n);
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}

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ir_node *
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(get_irn_inter_n)(ir_node *node, int n) {
  return __get_irn_inter_n (node, n);
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}

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ir_node *
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(get_irn_n)(ir_node *node, int n) {
  return __get_irn_n (node, n);
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}

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void
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set_irn_n (ir_node *node, int n, ir_node *in) {
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  assert(node && node->kind == k_ir_node && -1 <= n && n < get_irn_arity(node));
  assert(in && in->kind == k_ir_node);
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  if ((n == -1) && (get_irn_opcode(node) == iro_Filter)) {
    /* Change block pred in both views! */
    node->in[n + 1] = in;
    assert(node->attr.filter.in_cg);
    node->attr.filter.in_cg[n + 1] = in;
    return;
  }
  if (interprocedural_view) { /* handle Filter and Block specially */
    if (get_irn_opcode(node) == iro_Filter) {
      assert(node->attr.filter.in_cg);
      node->attr.filter.in_cg[n + 1] = in;
      return;
    } else if (get_irn_opcode(node) == iro_Block && node->attr.block.in_cg) {
      node->attr.block.in_cg[n + 1] = in;
      return;
    }
    /* else fall through */
  }
  node->in[n + 1] = in;
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}

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ir_mode *
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(get_irn_mode)(const ir_node *node) {
  return __get_irn_mode(node);
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}

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void
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(set_irn_mode)(ir_node *node, ir_mode *mode)
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{
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  __set_irn_mode(node, mode);
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}

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

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/** Gets the string representation of the mode .*/
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const char *
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get_irn_modename (const ir_node *node)
{
  assert(node);
  return get_mode_name(node->mode);
}
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ident *
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get_irn_modeident (const ir_node *node)
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{
  assert(node);
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  return get_mode_ident(node->mode);
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}

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ir_op *
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(get_irn_op)(const ir_node *node)
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{
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  return __get_irn_op(node);
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}

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

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opcode
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(get_irn_opcode)(const ir_node *node)
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{
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  return __get_irn_opcode(node);
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}

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const char *
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get_irn_opname (const ir_node *node)
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{
  assert(node);
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  if ((get_irn_op((ir_node *)node) == op_Phi) &&
      (get_irg_phase_state(get_irn_irg((ir_node *)node)) == phase_building) &&
      (get_irn_arity((ir_node *)node) == 0)) return "Phi0";
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  return get_id_str(node->op->name);
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}

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ident *
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get_irn_opident (const ir_node *node)
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{
  assert(node);
  return node->op->name;
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}

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unsigned long
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(get_irn_visited)(const ir_node *node)
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{
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  return __get_irn_visited(node);
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}

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void
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(set_irn_visited)(ir_node *node, unsigned long visited)
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{
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  __set_irn_visited(node, visited);
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}
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void
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(mark_irn_visited)(ir_node *node) {
  __mark_irn_visited(node);
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}

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int
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(irn_not_visited)(const ir_node *node) {
  return __irn_not_visited(node);
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}

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int
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(irn_visited)(const ir_node *node) {
  return __irn_visited(node);
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}

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void
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(set_irn_link)(ir_node *node, void *link) {
  __set_irn_link(node, link);
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}

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void *
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(get_irn_link)(const ir_node *node) {
  return __get_irn_link(node);
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}

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#ifdef DO_HEAPANALYSIS
/* Access the abstract interpretation information of a node.
   Returns NULL if no such information is available. */
struct abstval *get_irn_abst_value(ir_node *n) {
  return n->av;
}
/* Set the abstract interpretation information of a node. */
void set_irn_abst_value(ir_node *n, struct abstval *os) {
  n->av = os;
}
struct section *firm_get_irn_section(ir_node *n) {
  return n->sec;
}
void firm_set_irn_section(ir_node *n, struct section *s) {
  n->sec = s;
}
#endif /* DO_HEAPANALYSIS */


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/* Outputs a unique number for this node */
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long
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get_irn_node_nr(const ir_node *node) {
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  assert(node);
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#ifdef DEBUG_libfirm
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  return node->node_nr;
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#else
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  return (long)&node;
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#endif
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}
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const_attr
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get_irn_const_attr (ir_node *node)
{
  assert (node->op == op_Const);
  return node->attr.con;
}

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

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

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

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

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type *
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get_irn_call_attr (ir_node *node)
{
  assert (node->op == op_Call);
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  return node->attr.call.cld_tp = skip_tid(node->attr.call.cld_tp);
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}

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type *
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get_irn_funccall_attr (ir_node *node)
{
  assert (node->op == op_FuncCall);
  return node->attr.call.cld_tp = skip_tid(node->attr.call.cld_tp);
}

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

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

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block_attr
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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 *
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get_nodes_block (ir_node *node) {
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  assert (!(node->op == op_Block));
  return get_irn_n(node, -1);
}

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

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/* 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) {
  if ((get_irn_op(n) == op_Proj) &&
      (get_Proj_proj(n) == pn_Start_P_frame_base)) {
    ir_node *start = get_Proj_pred(n);
    if (get_irn_op(start) == op_Start) {
      return get_irg_frame_type(get_irn_irg(start));
    }
  }
  return NULL;
}

/* 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) {
  if ((get_irn_op(n) == op_Proj) &&
      (get_Proj_proj(n) == pn_Start_P_globals)) {
    ir_node *start = get_Proj_pred(n);
    if (get_irn_op(start) == op_Start) {
      return get_glob_type();
    }
  }
  return NULL;
}

/* 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) {
  if ((get_irn_op(n) == op_Proj) &&
      (get_Proj_proj(n) == pn_Start_P_value_arg_base) &&
      (get_irn_op(get_Proj_pred(n)) == op_Start))
    return 1;
  return 0;
}

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


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

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ir_node *
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get_Block_cfgpred (ir_node *node, int pos) {
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  assert(node);
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  assert (node->op == op_Block);
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  assert(-1 <= pos && pos < get_irn_arity(node));
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  return get_irn_n(node, pos);
}

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

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

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

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

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/* For this current_ir_graph must be set. */
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void
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mark_Block_block_visited (ir_node *node) {
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  assert (node->op == op_Block);
  node->attr.block.block_visited = get_irg_block_visited(current_ir_graph);
}

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

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void
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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;
}
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/* handler handling for Blocks * /
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void
set_Block_handler (ir_node *block, ir_node *handler)  {
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  assert ((block->op == op_Block));
  assert ((handler->op == op_Block));
  block->attr.block.handler_entry = handler;
}

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ir_node *
get_Block_handler (ir_node *block) {
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  assert ((block->op == op_Block));
  return (block->attr.block.handler_entry);
}

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/ * handler handling for Nodes * /
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void
set_Node_handler (ir_node *node, ir_node *handler) {
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  set_Block_handler (get_nodes_block (node), handler);
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}

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ir_node *
get_Node_handler (ir_node *node) {
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  return (get_Block_handler (get_nodes_block (node)));
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}

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/ * exc_t handling for Blocks * /
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void set_Block_exc (ir_node *block, exc_t exc) {
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  assert ((block->op == op_Block));
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  block->attr.block.exc = exc;
}

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exc_t get_Block_exc (ir_node *block) {
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  assert ((block->op == op_Block));
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  return (block->attr.block.exc);
}

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/ * exc_t handling for Nodes * /
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void set_Node_exc (ir_node *node, exc_t exc) {
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  set_Block_exc (get_nodes_block (node), exc);
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}

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exc_t get_Node_exc (ir_node *node) {
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  return (get_Block_exc (get_nodes_block (node)));
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}
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*/
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void set_Block_cg_cfgpred_arr(ir_node * node, int arity, ir_node ** in) {
  assert(node->op == op_Block);
  if (node->attr.block.in_cg == NULL || arity != ARR_LEN(node->attr.block.in_cg) - 1) {
    node->attr.block.in_cg = NEW_ARR_D(ir_node *, current_ir_graph->obst, arity + 1);
    node->attr.block.in_cg[0] = NULL;
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    node->attr.block.cg_backedge = new_backedge_arr(current_ir_graph->obst, arity);
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    {
      /* Fix backedge array.  fix_backedges operates depending on
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     interprocedural_view. */
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      bool ipv = interprocedural_view;
      interprocedural_view = true;
      fix_backedges(current_ir_graph->obst, node);
      interprocedural_view = ipv;
    }
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  }
  memcpy(node->attr.block.in_cg + 1, in, sizeof(ir_node *) * arity);
}

void set_Block_cg_cfgpred(ir_node * node, int pos, ir_node * pred) {
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  assert(node->op == op_Block &&
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     node->attr.block.in_cg &&
     0 <= pos && pos < ARR_LEN(node->attr.block.in_cg) - 1);
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  node->attr.block.in_cg[pos + 1] = pred;
}

ir_node ** get_Block_cg_cfgpred_arr(ir_node * node) {
  assert(node->op == op_Block);
  return node->attr.block.in_cg == NULL ? NULL : node->attr.block.in_cg  + 1;
}

int get_Block_cg_n_cfgpreds(ir_node * node) {
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  assert(node->op == op_Block);
  return node->attr.block.in_cg == NULL ? 0 : ARR_LEN(node->attr.block.in_cg) - 1;
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}

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

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void remove_Block_cg_cfgpred_arr(ir_node * node) {
  assert(node->op == op_Block);
  node->attr.block.in_cg = NULL;
}

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void
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set_Start_irg(ir_node *node, ir_graph *irg) {
  assert(node->op == op_Start);
  assert(is_ir_graph(irg));
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  assert(0 && " Why set irg? -- use set_irn_irg");
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}

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int
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get_End_n_keepalives(ir_node *end) {
  assert (end->op == op_End);
  return (get_irn_arity(end) - END_KEEPALIVE_OFFSET);
}

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ir_node *
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get_End_keepalive(ir_node *end, int pos) {
  assert (end->op == op_End);
  return get_irn_n(end, pos + END_KEEPALIVE_OFFSET);
}

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void
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add_End_keepalive (ir_node *end, ir_node *ka) {
  assert (end->op == op_End);
  ARR_APP1 (ir_node *, end->in, ka);
}

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void
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set_End_keepalive(ir_node *end, int pos, ir_node *ka) {
  assert (end->op == op_End);
  set_irn_n(end, pos + END_KEEPALIVE_OFFSET, ka);
}

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void
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free_End (ir_node *end) {
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  assert (end->op == op_End);
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  end->kind = k_BAD;
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  DEL_ARR_F(end->in);  /* GL @@@ tut nicht ! */
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  end->in = NULL;   /* @@@ make sure we get an error if we use the
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               in array afterwards ... */
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}

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/*
> Implementing the case construct (which is where the constant Proj node is
> important) involves far more than simply determining the constant values.
> We could argue that this is more properly a function of the translator from
> Firm to the target machine.  That could be done if there was some way of
> projecting "default" out of the Cond node.
I know it's complicated.
Basically there are two proglems:
 - determining the gaps between the projs
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 - determining the biggest case constant to know the proj number for
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   the default node.
I see several solutions:
1. Introduce a ProjDefault node.  Solves both problems.
   This means to extend all optimizations executed during construction.
2. Give the Cond node for switch two flavors:
   a) there are no gaps in the projs  (existing flavor)
   b) gaps may exist, default proj is still the Proj with the largest
      projection number.  This covers also the gaps.
3. Fix the semantic of the Cond to that of 2b)

Solution 2 seems to be the best:
Computing the gaps in the Firm representation is not too hard, i.e.,
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libFIRM can implement a routine that transforms between the two
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flavours.  This is also possible for 1) but 2) does not require to
change any existing optimization.
Further it should be far simpler to determine the biggest constant than
to compute all gaps.
I don't want to choose 3) as 2a) seems to have advantages for
dataflow analysis and 3) does not allow to convert the representation to
2a).
*/
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ir_node *
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get_Cond_selector (ir_node *node) {
  assert (node->op == op_Cond);
  return get_irn_n(node, 0);
}

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

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cond_kind
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get_Cond_kind (ir_node *node) {
  assert (node->op == op_Cond);
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  return node->attr.c.kind;
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}

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void
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set_Cond_kind (ir_node *node, cond_kind kind) {
  assert (node->op == op_Cond);
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  node->attr.c.kind = kind;
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}

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long
get_Cond_defaultProj (ir_node *node) {
  assert (node->op == op_Cond);
  return node->attr.c.default_proj;
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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/* The source language type.  Must be an atomic type.  Mode of type must
   be mode of node. For tarvals from entities type must be pointer to
   entity type. */
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type *
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get_Const_type (ir_node *node) {
  assert (node->op == op_Const);
  return node->attr.con.tp;
}

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void
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set_Const_type (ir_node *node, type *tp) {
  assert (node->op == op_Const);
  if (tp != unknown_type) {
    assert (is_atomic_type(tp));
    assert (get_type_mode(tp) == get_irn_mode(node));
  }

  node->attr.con.tp = tp;
}


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

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

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type *
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get_SymConst_type (ir_node *node) {
  assert (   (node->op == op_SymConst)
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          && (   get_SymConst_kind(node) == symconst_type_tag
              || get_SymConst_kind(node) == symconst_size));
  return node->attr.i.sym.type_p = skip_tid(node->attr.i.sym.type_p);
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}

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void
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set_SymConst_type (ir_node *node, type *tp) {
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  assert (   (node->op == op_SymConst)
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          && (   get_SymConst_kind(node) == symconst_type_tag
              || get_SymConst_kind(node) == symconst_size));
  node->attr.i.sym.type_p = tp;
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}

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ident *
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get_SymConst_name (ir_node *node) {
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  assert (   (node->op == op_SymConst)
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          && (get_SymConst_kind(node) == symconst_addr_name));
  return node->attr.i.sym.ident_p;
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}

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void
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set_SymConst_name (ir_node *node, ident *name) {
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  assert (   (node->op == op_SymConst)
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          && (get_SymConst_kind(node) == symconst_addr_name));
  node->attr.i.sym.ident_p = name;
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}

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/* Only to access SymConst of kind symconst_addr_ent.  Else assertion: */
entity   *get_SymConst_entity (ir_node *node) {
  assert (   (node->op == op_SymConst)
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          && (get_SymConst_kind (node) == symconst_addr_ent));
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  return node->attr.i.sym.entity_p;
}

void     set_SymConst_entity (ir_node *node, entity *ent) {
  assert (   (node->op == op_SymConst)
          && (get_SymConst_kind(node) == symconst_addr_ent));
  node->attr.i.sym.entity_p  = ent;
}


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union symconst_symbol
get_SymConst_symbol (ir_node *node) {
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  assert (node->op == op_SymConst);
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  return node->attr.i.sym;
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}

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void
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set_SymConst_symbol (ir_node *node, union symconst_symbol sym) {
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  assert (node->op == op_SymConst);
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  //memcpy (&(node->attr.i.sym), sym, sizeof(type_or_id));
  node->attr.i.sym = sym;
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}

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

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

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

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

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

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

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

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

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entity *