Exemple #1
0
static tree
gfc_trans_omp_atomic (gfc_code *code)
{
  gfc_se lse;
  gfc_se rse;
  gfc_expr *expr2, *e;
  gfc_symbol *var;
  stmtblock_t block;
  tree lhsaddr, type, rhs, x;
  enum tree_code op = ERROR_MARK;
  bool var_on_left = false;

  code = code->block->next;
  gcc_assert (code->op == EXEC_ASSIGN);
  gcc_assert (code->next == NULL);
  var = code->expr->symtree->n.sym;

  gfc_init_se (&lse, NULL);
  gfc_init_se (&rse, NULL);
  gfc_start_block (&block);

  gfc_conv_expr (&lse, code->expr);
  gfc_add_block_to_block (&block, &lse.pre);
  type = TREE_TYPE (lse.expr);
  lhsaddr = gfc_build_addr_expr (NULL, lse.expr);

  expr2 = code->expr2;
  if (expr2->expr_type == EXPR_FUNCTION
      && expr2->value.function.isym->generic_id == GFC_ISYM_CONVERSION)
    expr2 = expr2->value.function.actual->expr;

  if (expr2->expr_type == EXPR_OP)
    {
      gfc_expr *e;
      switch (expr2->value.op.operator)
	{
	case INTRINSIC_PLUS:
	  op = PLUS_EXPR;
	  break;
	case INTRINSIC_TIMES:
	  op = MULT_EXPR;
	  break;
	case INTRINSIC_MINUS:
	  op = MINUS_EXPR;
	  break;
	case INTRINSIC_DIVIDE:
	  if (expr2->ts.type == BT_INTEGER)
	    op = TRUNC_DIV_EXPR;
	  else
	    op = RDIV_EXPR;
	  break;
	case INTRINSIC_AND:
	  op = TRUTH_ANDIF_EXPR;
	  break;
	case INTRINSIC_OR:
	  op = TRUTH_ORIF_EXPR;
	  break;
	case INTRINSIC_EQV:
	  op = EQ_EXPR;
	  break;
	case INTRINSIC_NEQV:
	  op = NE_EXPR;
	  break;
	default:
	  gcc_unreachable ();
	}
      e = expr2->value.op.op1;
      if (e->expr_type == EXPR_FUNCTION
	  && e->value.function.isym->generic_id == GFC_ISYM_CONVERSION)
	e = e->value.function.actual->expr;
      if (e->expr_type == EXPR_VARIABLE
	  && e->symtree != NULL
	  && e->symtree->n.sym == var)
	{
	  expr2 = expr2->value.op.op2;
	  var_on_left = true;
	}
      else
	{
	  e = expr2->value.op.op2;
	  if (e->expr_type == EXPR_FUNCTION
	      && e->value.function.isym->generic_id == GFC_ISYM_CONVERSION)
	    e = e->value.function.actual->expr;
	  gcc_assert (e->expr_type == EXPR_VARIABLE
		      && e->symtree != NULL
		      && e->symtree->n.sym == var);
	  expr2 = expr2->value.op.op1;
	  var_on_left = false;
	}
      gfc_conv_expr (&rse, expr2);
      gfc_add_block_to_block (&block, &rse.pre);
    }
  else
    {
      gcc_assert (expr2->expr_type == EXPR_FUNCTION);
      switch (expr2->value.function.isym->generic_id)
	{
	case GFC_ISYM_MIN:
	  op = MIN_EXPR;
	  break;
	case GFC_ISYM_MAX:
	  op = MAX_EXPR;
	  break;
	case GFC_ISYM_IAND:
	  op = BIT_AND_EXPR;
	  break;
	case GFC_ISYM_IOR:
	  op = BIT_IOR_EXPR;
	  break;
	case GFC_ISYM_IEOR:
	  op = BIT_XOR_EXPR;
	  break;
	default:
	  gcc_unreachable ();
	}
      e = expr2->value.function.actual->expr;
      gcc_assert (e->expr_type == EXPR_VARIABLE
		  && e->symtree != NULL
		  && e->symtree->n.sym == var);

      gfc_conv_expr (&rse, expr2->value.function.actual->next->expr);
      gfc_add_block_to_block (&block, &rse.pre);
      if (expr2->value.function.actual->next->next != NULL)
	{
	  tree accum = gfc_create_var (TREE_TYPE (rse.expr), NULL);
	  gfc_actual_arglist *arg;

	  gfc_add_modify_expr (&block, accum, rse.expr);
	  for (arg = expr2->value.function.actual->next->next; arg;
	       arg = arg->next)
	    {
	      gfc_init_block (&rse.pre);
	      gfc_conv_expr (&rse, arg->expr);
	      gfc_add_block_to_block (&block, &rse.pre);
	      x = fold_build2 (op, TREE_TYPE (accum), accum, rse.expr);
	      gfc_add_modify_expr (&block, accum, x);
	    }

	  rse.expr = accum;
	}

      expr2 = expr2->value.function.actual->next->expr;
    }

  lhsaddr = save_expr (lhsaddr);
  rhs = gfc_evaluate_now (rse.expr, &block);
  x = convert (TREE_TYPE (rhs), build_fold_indirect_ref (lhsaddr));

  if (var_on_left)
    x = fold_build2 (op, TREE_TYPE (rhs), x, rhs);
  else
    x = fold_build2 (op, TREE_TYPE (rhs), rhs, x);

  if (TREE_CODE (TREE_TYPE (rhs)) == COMPLEX_TYPE
      && TREE_CODE (type) != COMPLEX_TYPE)
    x = build1 (REALPART_EXPR, TREE_TYPE (TREE_TYPE (rhs)), x);

  x = build2_v (OMP_ATOMIC, lhsaddr, convert (type, x));
  gfc_add_expr_to_block (&block, x);

  gfc_add_block_to_block (&block, &lse.pre);
  gfc_add_block_to_block (&block, &rse.pre);

  return gfc_finish_block (&block);
}
Exemple #2
0
static void
gfc_trans_omp_array_reduction (tree c, gfc_symbol *sym, locus where)
{
  gfc_symtree *root1 = NULL, *root2 = NULL, *root3 = NULL, *root4 = NULL;
  gfc_symtree *symtree1, *symtree2, *symtree3, *symtree4 = NULL;
  gfc_symbol init_val_sym, outer_sym, intrinsic_sym;
  gfc_expr *e1, *e2, *e3, *e4;
  gfc_ref *ref;
  tree decl, backend_decl, stmt;
  locus old_loc = gfc_current_locus;
  const char *iname;
  try t;

  decl = OMP_CLAUSE_DECL (c);
  gfc_current_locus = where;

  /* Create a fake symbol for init value.  */
  memset (&init_val_sym, 0, sizeof (init_val_sym));
  init_val_sym.ns = sym->ns;
  init_val_sym.name = sym->name;
  init_val_sym.ts = sym->ts;
  init_val_sym.attr.referenced = 1;
  init_val_sym.declared_at = where;
  init_val_sym.attr.flavor = FL_VARIABLE;
  backend_decl = omp_reduction_init (c, gfc_sym_type (&init_val_sym));
  init_val_sym.backend_decl = backend_decl;

  /* Create a fake symbol for the outer array reference.  */
  outer_sym = *sym;
  outer_sym.as = gfc_copy_array_spec (sym->as);
  outer_sym.attr.dummy = 0;
  outer_sym.attr.result = 0;
  outer_sym.attr.flavor = FL_VARIABLE;
  outer_sym.backend_decl = create_tmp_var_raw (TREE_TYPE (decl), NULL);

  /* Create fake symtrees for it.  */
  symtree1 = gfc_new_symtree (&root1, sym->name);
  symtree1->n.sym = sym;
  gcc_assert (symtree1 == root1);

  symtree2 = gfc_new_symtree (&root2, sym->name);
  symtree2->n.sym = &init_val_sym;
  gcc_assert (symtree2 == root2);

  symtree3 = gfc_new_symtree (&root3, sym->name);
  symtree3->n.sym = &outer_sym;
  gcc_assert (symtree3 == root3);

  /* Create expressions.  */
  e1 = gfc_get_expr ();
  e1->expr_type = EXPR_VARIABLE;
  e1->where = where;
  e1->symtree = symtree1;
  e1->ts = sym->ts;
  e1->ref = ref = gfc_get_ref ();
  ref->u.ar.where = where;
  ref->u.ar.as = sym->as;
  ref->u.ar.type = AR_FULL;
  ref->u.ar.dimen = 0;
  t = gfc_resolve_expr (e1);
  gcc_assert (t == SUCCESS);

  e2 = gfc_get_expr ();
  e2->expr_type = EXPR_VARIABLE;
  e2->where = where;
  e2->symtree = symtree2;
  e2->ts = sym->ts;
  t = gfc_resolve_expr (e2);
  gcc_assert (t == SUCCESS);

  e3 = gfc_copy_expr (e1);
  e3->symtree = symtree3;
  t = gfc_resolve_expr (e3);
  gcc_assert (t == SUCCESS);

  iname = NULL;
  switch (OMP_CLAUSE_REDUCTION_CODE (c))
    {
    case PLUS_EXPR:
    case MINUS_EXPR:
      e4 = gfc_add (e3, e1);
      break;
    case MULT_EXPR:
      e4 = gfc_multiply (e3, e1);
      break;
    case TRUTH_ANDIF_EXPR:
      e4 = gfc_and (e3, e1);
      break;
    case TRUTH_ORIF_EXPR:
      e4 = gfc_or (e3, e1);
      break;
    case EQ_EXPR:
      e4 = gfc_eqv (e3, e1);
      break;
    case NE_EXPR:
      e4 = gfc_neqv (e3, e1);
      break;
    case MIN_EXPR:
      iname = "min";
      break;
    case MAX_EXPR:
      iname = "max";
      break;
    case BIT_AND_EXPR:
      iname = "iand";
      break;
    case BIT_IOR_EXPR:
      iname = "ior";
      break;
    case BIT_XOR_EXPR:
      iname = "ieor";
      break;
    default:
      gcc_unreachable ();
    }
  if (iname != NULL)
    {
      memset (&intrinsic_sym, 0, sizeof (intrinsic_sym));
      intrinsic_sym.ns = sym->ns;
      intrinsic_sym.name = iname;
      intrinsic_sym.ts = sym->ts;
      intrinsic_sym.attr.referenced = 1;
      intrinsic_sym.attr.intrinsic = 1;
      intrinsic_sym.attr.function = 1;
      intrinsic_sym.result = &intrinsic_sym;
      intrinsic_sym.declared_at = where;

      symtree4 = gfc_new_symtree (&root4, iname);
      symtree4->n.sym = &intrinsic_sym;
      gcc_assert (symtree4 == root4);

      e4 = gfc_get_expr ();
      e4->expr_type = EXPR_FUNCTION;
      e4->where = where;
      e4->symtree = symtree4;
      e4->value.function.isym = gfc_find_function (iname);
      e4->value.function.actual = gfc_get_actual_arglist ();
      e4->value.function.actual->expr = e3;
      e4->value.function.actual->next = gfc_get_actual_arglist ();
      e4->value.function.actual->next->expr = e1;
    }
  /* e1 and e3 have been stored as arguments of e4, avoid sharing.  */
  e1 = gfc_copy_expr (e1);
  e3 = gfc_copy_expr (e3);
  t = gfc_resolve_expr (e4);
  gcc_assert (t == SUCCESS);

  /* Create the init statement list.  */
  pushlevel (0);
  stmt = gfc_trans_assignment (e1, e2, false);
  if (TREE_CODE (stmt) != BIND_EXPR)
    stmt = build3_v (BIND_EXPR, NULL, stmt, poplevel (1, 0, 0));
  else
    poplevel (0, 0, 0);
  OMP_CLAUSE_REDUCTION_INIT (c) = stmt;

  /* Create the merge statement list.  */
  pushlevel (0);
  stmt = gfc_trans_assignment (e3, e4, false);
  if (TREE_CODE (stmt) != BIND_EXPR)
    stmt = build3_v (BIND_EXPR, NULL, stmt, poplevel (1, 0, 0));
  else
    poplevel (0, 0, 0);
  OMP_CLAUSE_REDUCTION_MERGE (c) = stmt;

  /* And stick the placeholder VAR_DECL into the clause as well.  */
  OMP_CLAUSE_REDUCTION_PLACEHOLDER (c) = outer_sym.backend_decl;

  gfc_current_locus = old_loc;

  gfc_free_expr (e1);
  gfc_free_expr (e2);
  gfc_free_expr (e3);
  gfc_free_expr (e4);
  gfc_free (symtree1);
  gfc_free (symtree2);
  gfc_free (symtree3);
  if (symtree4)
    gfc_free (symtree4);
  gfc_free_array_spec (outer_sym.as);
}

static tree
gfc_trans_omp_reduction_list (gfc_namelist *namelist, tree list, 
			      enum tree_code reduction_code, locus where)
{
  for (; namelist != NULL; namelist = namelist->next)
    if (namelist->sym->attr.referenced)
      {
	tree t = gfc_trans_omp_variable (namelist->sym);
	if (t != error_mark_node)
	  {
	    tree node = build_omp_clause (OMP_CLAUSE_REDUCTION);
	    OMP_CLAUSE_DECL (node) = t;
	    OMP_CLAUSE_REDUCTION_CODE (node) = reduction_code;
	    if (namelist->sym->attr.dimension)
	      gfc_trans_omp_array_reduction (node, namelist->sym, where);
	    list = gfc_trans_add_clause (node, list);
	  }
      }
  return list;
}

static tree
gfc_trans_omp_clauses (stmtblock_t *block, gfc_omp_clauses *clauses,
		       locus where)
{
  tree omp_clauses = NULL_TREE, chunk_size, c, old_clauses;
  int list;
  enum omp_clause_code clause_code;
  gfc_se se;

  if (clauses == NULL)
    return NULL_TREE;

  for (list = 0; list < OMP_LIST_NUM; list++)
    {
      gfc_namelist *n = clauses->lists[list];

      if (n == NULL)
	continue;
      if (list >= OMP_LIST_REDUCTION_FIRST
	  && list <= OMP_LIST_REDUCTION_LAST)
	{
	  enum tree_code reduction_code;
	  switch (list)
	    {
	    case OMP_LIST_PLUS:
	      reduction_code = PLUS_EXPR;
	      break;
	    case OMP_LIST_MULT:
	      reduction_code = MULT_EXPR;
	      break;
	    case OMP_LIST_SUB:
	      reduction_code = MINUS_EXPR;
	      break;
	    case OMP_LIST_AND:
	      reduction_code = TRUTH_ANDIF_EXPR;
	      break;
	    case OMP_LIST_OR:
	      reduction_code = TRUTH_ORIF_EXPR;
	      break;
	    case OMP_LIST_EQV:
	      reduction_code = EQ_EXPR;
	      break;
	    case OMP_LIST_NEQV:
	      reduction_code = NE_EXPR;
	      break;
	    case OMP_LIST_MAX:
	      reduction_code = MAX_EXPR;
	      break;
	    case OMP_LIST_MIN:
	      reduction_code = MIN_EXPR;
	      break;
	    case OMP_LIST_IAND:
	      reduction_code = BIT_AND_EXPR;
	      break;
	    case OMP_LIST_IOR:
	      reduction_code = BIT_IOR_EXPR;
	      break;
	    case OMP_LIST_IEOR:
	      reduction_code = BIT_XOR_EXPR;
	      break;
	    default:
	      gcc_unreachable ();
	    }
	  old_clauses = omp_clauses;
	  omp_clauses
	    = gfc_trans_omp_reduction_list (n, omp_clauses, reduction_code,
					    where);
	  continue;
	}
      switch (list)
	{
	case OMP_LIST_PRIVATE:
	  clause_code = OMP_CLAUSE_PRIVATE;
	  goto add_clause;
	case OMP_LIST_SHARED:
	  clause_code = OMP_CLAUSE_SHARED;
	  goto add_clause;
	case OMP_LIST_FIRSTPRIVATE:
	  clause_code = OMP_CLAUSE_FIRSTPRIVATE;
	  goto add_clause;
	case OMP_LIST_LASTPRIVATE:
	  clause_code = OMP_CLAUSE_LASTPRIVATE;
	  goto add_clause;
	case OMP_LIST_COPYIN:
	  clause_code = OMP_CLAUSE_COPYIN;
	  goto add_clause;
	case OMP_LIST_COPYPRIVATE:
	  clause_code = OMP_CLAUSE_COPYPRIVATE;
	  /* FALLTHROUGH */
	add_clause:
	  omp_clauses
	    = gfc_trans_omp_variable_list (clause_code, n, omp_clauses);
	  break;
	default:
	  break;
	}
    }

  if (clauses->if_expr)
    {
      tree if_var;

      gfc_init_se (&se, NULL);
      gfc_conv_expr (&se, clauses->if_expr);
      gfc_add_block_to_block (block, &se.pre);
      if_var = gfc_evaluate_now (se.expr, block);
      gfc_add_block_to_block (block, &se.post);

      c = build_omp_clause (OMP_CLAUSE_IF);
      OMP_CLAUSE_IF_EXPR (c) = if_var;
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  if (clauses->num_threads)
    {
      tree num_threads;

      gfc_init_se (&se, NULL);
      gfc_conv_expr (&se, clauses->num_threads);
      gfc_add_block_to_block (block, &se.pre);
      num_threads = gfc_evaluate_now (se.expr, block);
      gfc_add_block_to_block (block, &se.post);

      c = build_omp_clause (OMP_CLAUSE_NUM_THREADS);
      OMP_CLAUSE_NUM_THREADS_EXPR (c) = num_threads;
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  chunk_size = NULL_TREE;
  if (clauses->chunk_size)
    {
      gfc_init_se (&se, NULL);
      gfc_conv_expr (&se, clauses->chunk_size);
      gfc_add_block_to_block (block, &se.pre);
      chunk_size = gfc_evaluate_now (se.expr, block);
      gfc_add_block_to_block (block, &se.post);
    }

  if (clauses->sched_kind != OMP_SCHED_NONE)
    {
      c = build_omp_clause (OMP_CLAUSE_SCHEDULE);
      OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = chunk_size;
      switch (clauses->sched_kind)
	{
	case OMP_SCHED_STATIC:
	  OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
	  break;
	case OMP_SCHED_DYNAMIC:
	  OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
	  break;
	case OMP_SCHED_GUIDED:
	  OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
	  break;
	case OMP_SCHED_RUNTIME:
	  OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
	  break;
	default:
	  gcc_unreachable ();
	}
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  if (clauses->default_sharing != OMP_DEFAULT_UNKNOWN)
    {
      c = build_omp_clause (OMP_CLAUSE_DEFAULT);
      switch (clauses->default_sharing)
	{
	case OMP_DEFAULT_NONE:
	  OMP_CLAUSE_DEFAULT_KIND (c) = OMP_CLAUSE_DEFAULT_NONE;
	  break;
	case OMP_DEFAULT_SHARED:
	  OMP_CLAUSE_DEFAULT_KIND (c) = OMP_CLAUSE_DEFAULT_SHARED;
	  break;
	case OMP_DEFAULT_PRIVATE:
	  OMP_CLAUSE_DEFAULT_KIND (c) = OMP_CLAUSE_DEFAULT_PRIVATE;
	  break;
	default:
	  gcc_unreachable ();
	}
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  if (clauses->nowait)
    {
      c = build_omp_clause (OMP_CLAUSE_NOWAIT);
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  if (clauses->ordered)
    {
      c = build_omp_clause (OMP_CLAUSE_ORDERED);
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  return omp_clauses;
}
Exemple #3
0
static tree
gfc_build_final_call (gfc_typespec ts, gfc_expr *final_wrapper, gfc_expr *var,
		      bool fini_coarray, gfc_expr *class_size)
{
  stmtblock_t block;
  gfc_se se;
  tree final_fndecl, array, size, tmp;
  symbol_attribute attr;

  gcc_assert (final_wrapper->expr_type == EXPR_VARIABLE);
  gcc_assert (var);

  gfc_start_block (&block);
  gfc_init_se (&se, NULL);
  gfc_conv_expr (&se, final_wrapper);
  final_fndecl = se.expr;
  if (POINTER_TYPE_P (TREE_TYPE (final_fndecl)))
    final_fndecl = build_fold_indirect_ref_loc (input_location, final_fndecl);

  if (ts.type == BT_DERIVED)
    {
      tree elem_size;

      gcc_assert (!class_size);
      elem_size = gfc_typenode_for_spec (&ts);
      elem_size = TYPE_SIZE_UNIT (elem_size);
      size = fold_convert (gfc_array_index_type, elem_size);

      gfc_init_se (&se, NULL);
      se.want_pointer = 1;
      if (var->rank)
	{
	  se.descriptor_only = 1;
	  gfc_conv_expr_descriptor (&se, var);
	  array = se.expr;
	}
      else
	{
	  gfc_conv_expr (&se, var);
	  gcc_assert (se.pre.head == NULL_TREE && se.post.head == NULL_TREE);
	  array = se.expr;

	  /* No copy back needed, hence set attr's allocatable/pointer
	     to zero.  */
	  gfc_clear_attr (&attr);
	  gfc_init_se (&se, NULL);
	  array = gfc_conv_scalar_to_descriptor (&se, array, attr);
	  gcc_assert (se.post.head == NULL_TREE);
	}
    }
  else
    {
      gfc_expr *array_expr;
      gcc_assert (class_size);
      gfc_init_se (&se, NULL);
      gfc_conv_expr (&se, class_size);
      gfc_add_block_to_block (&block, &se.pre);
      gcc_assert (se.post.head == NULL_TREE);
      size = se.expr;

      array_expr = gfc_copy_expr (var);
      gfc_init_se (&se, NULL);
      se.want_pointer = 1;
      if (array_expr->rank)
	{
	  gfc_add_class_array_ref (array_expr);
	  se.descriptor_only = 1;
	  gfc_conv_expr_descriptor (&se, array_expr);
	  array = se.expr;
	}
      else
	{
	  gfc_add_data_component (array_expr);
	  gfc_conv_expr (&se, array_expr);
	  gfc_add_block_to_block (&block, &se.pre);
	  gcc_assert (se.post.head == NULL_TREE);
	  array = se.expr;
	  if (TREE_CODE (array) == ADDR_EXPR
	      && POINTER_TYPE_P (TREE_TYPE (TREE_OPERAND (array, 0))))
	    tmp = TREE_OPERAND (array, 0);

	  if (!gfc_is_coarray (array_expr))
	    {
	      /* No copy back needed, hence set attr's allocatable/pointer
		 to zero.  */
	      gfc_clear_attr (&attr);
	      gfc_init_se (&se, NULL);
	      array = gfc_conv_scalar_to_descriptor (&se, array, attr);
	    }
	  gcc_assert (se.post.head == NULL_TREE);
	}
      gfc_free_expr (array_expr);
    }

  if (!POINTER_TYPE_P (TREE_TYPE (array)))
    array = gfc_build_addr_expr (NULL, array);

  gfc_add_block_to_block (&block, &se.pre);
  tmp = build_call_expr_loc (input_location,
			     final_fndecl, 3, array,
			     size, fini_coarray ? boolean_true_node
						: boolean_false_node);
  gfc_add_block_to_block (&block, &se.post);
  gfc_add_expr_to_block (&block, tmp);
  return gfc_finish_block (&block);
}
Exemple #4
0
bool
gfc_add_finalizer_call (stmtblock_t *block, gfc_expr *expr2)
{
  tree tmp;
  gfc_ref *ref;
  gfc_expr *expr;
  gfc_expr *final_expr = NULL;
  gfc_expr *elem_size = NULL;
  bool has_finalizer = false;

  if (!expr2 || (expr2->ts.type != BT_DERIVED && expr2->ts.type != BT_CLASS))
    return false;

  if (expr2->ts.type == BT_DERIVED)
    {
      gfc_is_finalizable (expr2->ts.u.derived, &final_expr);
      if (!final_expr)
        return false;
    }

  /* If we have a class array, we need go back to the class
     container. */
  expr = gfc_copy_expr (expr2);

  if (expr->ref && expr->ref->next && !expr->ref->next->next
      && expr->ref->next->type == REF_ARRAY
      && expr->ref->type == REF_COMPONENT
      && strcmp (expr->ref->u.c.component->name, "_data") == 0)
    {
      gfc_free_ref_list (expr->ref);
      expr->ref = NULL;
    }
  else
    for (ref = expr->ref; ref; ref = ref->next)
      if (ref->next && ref->next->next && !ref->next->next->next
         && ref->next->next->type == REF_ARRAY
         && ref->next->type == REF_COMPONENT
         && strcmp (ref->next->u.c.component->name, "_data") == 0)
       {
         gfc_free_ref_list (ref->next);
         ref->next = NULL;
       }

  if (expr->ts.type == BT_CLASS)
    {
      has_finalizer = gfc_is_finalizable (expr->ts.u.derived, NULL);

      if (!expr2->rank && !expr2->ref && CLASS_DATA (expr2->symtree->n.sym)->as)
	expr->rank = CLASS_DATA (expr2->symtree->n.sym)->as->rank;

      final_expr = gfc_copy_expr (expr);
      gfc_add_vptr_component (final_expr);
      gfc_add_component_ref (final_expr, "_final");

      elem_size = gfc_copy_expr (expr);
      gfc_add_vptr_component (elem_size);
      gfc_add_component_ref (elem_size, "_size");
    }

  gcc_assert (final_expr->expr_type == EXPR_VARIABLE);

  tmp = gfc_build_final_call (expr->ts, final_expr, expr,
			      false, elem_size);

  if (expr->ts.type == BT_CLASS && !has_finalizer)
    {
      tree cond;
      gfc_se se;

      gfc_init_se (&se, NULL);
      se.want_pointer = 1;
      gfc_conv_expr (&se, final_expr);
      cond = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
			      se.expr, build_int_cst (TREE_TYPE (se.expr), 0));

      /* For CLASS(*) not only sym->_vtab->_final can be NULL
	 but already sym->_vtab itself.  */
      if (UNLIMITED_POLY (expr))
	{
	  tree cond2;
	  gfc_expr *vptr_expr;

	  vptr_expr = gfc_copy_expr (expr);
	  gfc_add_vptr_component (vptr_expr);

	  gfc_init_se (&se, NULL);
	  se.want_pointer = 1;
	  gfc_conv_expr (&se, vptr_expr);
	  gfc_free_expr (vptr_expr);

	  cond2 = fold_build2_loc (input_location, NE_EXPR, boolean_type_node,
				   se.expr,
				   build_int_cst (TREE_TYPE (se.expr), 0));
	  cond = fold_build2_loc (input_location, TRUTH_ANDIF_EXPR,
				  boolean_type_node, cond2, cond);
	}

      tmp = fold_build3_loc (input_location, COND_EXPR, void_type_node,
			     cond, tmp, build_empty_stmt (input_location));
    }

  gfc_add_expr_to_block (block, tmp);

  return true;
}
static tree
gfc_trans_omp_clauses (stmtblock_t *block, gfc_omp_clauses *clauses,
		       locus where)
{
  tree omp_clauses = NULL_TREE, chunk_size, c;
  int list;
  enum omp_clause_code clause_code;
  gfc_se se;

  if (clauses == NULL)
    return NULL_TREE;

  for (list = 0; list < OMP_LIST_NUM; list++)
    {
      gfc_namelist *n = clauses->lists[list];

      if (n == NULL)
	continue;
      if (list >= OMP_LIST_REDUCTION_FIRST
	  && list <= OMP_LIST_REDUCTION_LAST)
	{
	  enum tree_code reduction_code;
	  switch (list)
	    {
	    case OMP_LIST_PLUS:
	      reduction_code = PLUS_EXPR;
	      break;
	    case OMP_LIST_MULT:
	      reduction_code = MULT_EXPR;
	      break;
	    case OMP_LIST_SUB:
	      reduction_code = MINUS_EXPR;
	      break;
	    case OMP_LIST_AND:
	      reduction_code = TRUTH_ANDIF_EXPR;
	      break;
	    case OMP_LIST_OR:
	      reduction_code = TRUTH_ORIF_EXPR;
	      break;
	    case OMP_LIST_EQV:
	      reduction_code = EQ_EXPR;
	      break;
	    case OMP_LIST_NEQV:
	      reduction_code = NE_EXPR;
	      break;
	    case OMP_LIST_MAX:
	      reduction_code = MAX_EXPR;
	      break;
	    case OMP_LIST_MIN:
	      reduction_code = MIN_EXPR;
	      break;
	    case OMP_LIST_IAND:
	      reduction_code = BIT_AND_EXPR;
	      break;
	    case OMP_LIST_IOR:
	      reduction_code = BIT_IOR_EXPR;
	      break;
	    case OMP_LIST_IEOR:
	      reduction_code = BIT_XOR_EXPR;
	      break;
	    default:
	      gcc_unreachable ();
	    }
	  omp_clauses
	    = gfc_trans_omp_reduction_list (n, omp_clauses, reduction_code,
					    where);
	  continue;
	}
      switch (list)
	{
	case OMP_LIST_PRIVATE:
	  clause_code = OMP_CLAUSE_PRIVATE;
	  goto add_clause;
	case OMP_LIST_SHARED:
	  clause_code = OMP_CLAUSE_SHARED;
	  goto add_clause;
	case OMP_LIST_FIRSTPRIVATE:
	  clause_code = OMP_CLAUSE_FIRSTPRIVATE;
	  goto add_clause;
	case OMP_LIST_LASTPRIVATE:
	  clause_code = OMP_CLAUSE_LASTPRIVATE;
	  goto add_clause;
	case OMP_LIST_COPYIN:
	  clause_code = OMP_CLAUSE_COPYIN;
	  goto add_clause;
	case OMP_LIST_COPYPRIVATE:
	  clause_code = OMP_CLAUSE_COPYPRIVATE;
	  /* FALLTHROUGH */
	add_clause:
	  omp_clauses
	    = gfc_trans_omp_variable_list (clause_code, n, omp_clauses);
	  break;
	default:
	  break;
	}
    }

  if (clauses->if_expr)
    {
      tree if_var;

      gfc_init_se (&se, NULL);
      gfc_conv_expr (&se, clauses->if_expr);
      gfc_add_block_to_block (block, &se.pre);
      if_var = gfc_evaluate_now (se.expr, block);
      gfc_add_block_to_block (block, &se.post);

      c = build_omp_clause (where.lb->location, OMP_CLAUSE_IF);
      OMP_CLAUSE_IF_EXPR (c) = if_var;
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  if (clauses->num_threads)
    {
      tree num_threads;

      gfc_init_se (&se, NULL);
      gfc_conv_expr (&se, clauses->num_threads);
      gfc_add_block_to_block (block, &se.pre);
      num_threads = gfc_evaluate_now (se.expr, block);
      gfc_add_block_to_block (block, &se.post);

      c = build_omp_clause (where.lb->location, OMP_CLAUSE_NUM_THREADS);
      OMP_CLAUSE_NUM_THREADS_EXPR (c) = num_threads;
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  chunk_size = NULL_TREE;
  if (clauses->chunk_size)
    {
      gfc_init_se (&se, NULL);
      gfc_conv_expr (&se, clauses->chunk_size);
      gfc_add_block_to_block (block, &se.pre);
      chunk_size = gfc_evaluate_now (se.expr, block);
      gfc_add_block_to_block (block, &se.post);
    }

  if (clauses->sched_kind != OMP_SCHED_NONE)
    {
      c = build_omp_clause (where.lb->location, OMP_CLAUSE_SCHEDULE);
      OMP_CLAUSE_SCHEDULE_CHUNK_EXPR (c) = chunk_size;
      switch (clauses->sched_kind)
	{
	case OMP_SCHED_STATIC:
	  OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_STATIC;
	  break;
	case OMP_SCHED_DYNAMIC:
	  OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_DYNAMIC;
	  break;
	case OMP_SCHED_GUIDED:
	  OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_GUIDED;
	  break;
	case OMP_SCHED_RUNTIME:
	  OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_RUNTIME;
	  break;
	case OMP_SCHED_AUTO:
	  OMP_CLAUSE_SCHEDULE_KIND (c) = OMP_CLAUSE_SCHEDULE_AUTO;
	  break;
	default:
	  gcc_unreachable ();
	}
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  if (clauses->default_sharing != OMP_DEFAULT_UNKNOWN)
    {
      c = build_omp_clause (where.lb->location, OMP_CLAUSE_DEFAULT);
      switch (clauses->default_sharing)
	{
	case OMP_DEFAULT_NONE:
	  OMP_CLAUSE_DEFAULT_KIND (c) = OMP_CLAUSE_DEFAULT_NONE;
	  break;
	case OMP_DEFAULT_SHARED:
	  OMP_CLAUSE_DEFAULT_KIND (c) = OMP_CLAUSE_DEFAULT_SHARED;
	  break;
	case OMP_DEFAULT_PRIVATE:
	  OMP_CLAUSE_DEFAULT_KIND (c) = OMP_CLAUSE_DEFAULT_PRIVATE;
	  break;
	case OMP_DEFAULT_FIRSTPRIVATE:
	  OMP_CLAUSE_DEFAULT_KIND (c) = OMP_CLAUSE_DEFAULT_FIRSTPRIVATE;
	  break;
	default:
	  gcc_unreachable ();
	}
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  if (clauses->nowait)
    {
      c = build_omp_clause (where.lb->location, OMP_CLAUSE_NOWAIT);
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  if (clauses->ordered)
    {
      c = build_omp_clause (where.lb->location, OMP_CLAUSE_ORDERED);
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  if (clauses->untied)
    {
      c = build_omp_clause (where.lb->location, OMP_CLAUSE_UNTIED);
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  if (clauses->collapse)
    {
      c = build_omp_clause (where.lb->location, OMP_CLAUSE_COLLAPSE);
      OMP_CLAUSE_COLLAPSE_EXPR (c) = build_int_cst (NULL, clauses->collapse);
      omp_clauses = gfc_trans_add_clause (c, omp_clauses);
    }

  return omp_clauses;
}