Exemplos de gimple_default_def em C++ (Cpp)

Exemplo n.º 1

Arquivo: tree-complex.c Projeto: applesnake/cocotron-tools-gpl3

static void
init_parameter_lattice_values (void)
{
  tree parm, ssa_name;

  for (parm = DECL_ARGUMENTS (cfun->decl); parm ; parm = TREE_CHAIN (parm))
    if (is_complex_reg (parm)
	&& var_ann (parm) != NULL
	&& (ssa_name = gimple_default_def (cfun, parm)) != NULL_TREE)
      VEC_replace (complex_lattice_t, complex_lattice_values,
		   SSA_NAME_VERSION (ssa_name), VARYING);
}

Exemplo n.º 2

Arquivo: tree-ssa-copyrename.c Projeto: DIYzzuzpb/pic32-gcc

static bool
copy_rename_partition_coalesce (var_map map, tree var1, tree var2, FILE *debug)
{
  int p1, p2, p3;
  tree root1, root2;
  tree rep1, rep2;
  bool ign1, ign2, abnorm;

  gcc_assert (TREE_CODE (var1) == SSA_NAME);
  gcc_assert (TREE_CODE (var2) == SSA_NAME);

  register_ssa_partition (map, var1);
  register_ssa_partition (map, var2);

  p1 = partition_find (map->var_partition, SSA_NAME_VERSION (var1));
  p2 = partition_find (map->var_partition, SSA_NAME_VERSION (var2));

  if (debug)
    {
      fprintf (debug, "Try : ");
      print_generic_expr (debug, var1, TDF_SLIM);
      fprintf (debug, "(P%d) & ", p1);
      print_generic_expr (debug, var2, TDF_SLIM);
      fprintf (debug, "(P%d)", p2);
    }

  gcc_assert (p1 != NO_PARTITION);
  gcc_assert (p2 != NO_PARTITION);

  rep1 = partition_to_var (map, p1);
  rep2 = partition_to_var (map, p2);
  root1 = SSA_NAME_VAR (rep1);
  root2 = SSA_NAME_VAR (rep2);

  if (p1 == p2)
    {
      if (debug)
	fprintf (debug, " : Already coalesced.\n");
      return false;
    }

  /* Don't coalesce if one of the variables occurs in an abnormal PHI.  */
  abnorm = (SSA_NAME_OCCURS_IN_ABNORMAL_PHI (rep1)
	    || SSA_NAME_OCCURS_IN_ABNORMAL_PHI (rep2));
  if (abnorm)
    {
      if (debug)
	fprintf (debug, " : Abnormal PHI barrier.  No coalesce.\n");
      return false;
    }

  /* Partitions already have the same root, simply merge them.  */
  if (root1 == root2)
    {
      p1 = partition_union (map->var_partition, p1, p2);
      if (debug)
	fprintf (debug, " : Same root, coalesced --> P%d.\n", p1);
      return false;
    }

  /* Never attempt to coalesce 2 difference parameters.  */
  if (TREE_CODE (root1) == PARM_DECL && TREE_CODE (root2) == PARM_DECL)
    {
      if (debug)
        fprintf (debug, " : 2 different PARM_DECLS. No coalesce.\n");
      return false;
    }

  if ((TREE_CODE (root1) == RESULT_DECL) != (TREE_CODE (root2) == RESULT_DECL))
    {
      if (debug)
        fprintf (debug, " : One root a RESULT_DECL. No coalesce.\n");
      return false;
    }

  ign1 = TREE_CODE (root1) == VAR_DECL && DECL_IGNORED_P (root1);
  ign2 = TREE_CODE (root2) == VAR_DECL && DECL_IGNORED_P (root2);

  /* Never attempt to coalesce 2 user variables unless one is an inline
     variable.  */
  if (!ign1 && !ign2)
    {
      if (DECL_FROM_INLINE (root2))
        ign2 = true;
      else if (DECL_FROM_INLINE (root1))
	ign1 = true;
      else
	{
	  if (debug)
	    fprintf (debug, " : 2 different USER vars. No coalesce.\n");
	  return false;
	}
    }

  /* If both values have default defs, we can't coalesce.  If only one has a
     tag, make sure that variable is the new root partition.  */
  if (gimple_default_def (cfun, root1))
    {
      if (gimple_default_def (cfun, root2))
	{
	  if (debug)
	    fprintf (debug, " : 2 default defs. No coalesce.\n");
	  return false;
	}
      else
        {
	  ign2 = true;
	  ign1 = false;
	}
    }
  else if (gimple_default_def (cfun, root2))
    {
      ign1 = true;
      ign2 = false;
    }

  /* Don't coalesce if the two variables aren't type compatible.  */
  if (!types_compatible_p (TREE_TYPE (root1), TREE_TYPE (root2)))
    {
      if (debug)
	fprintf (debug, " : Incompatible types.  No coalesce.\n");
      return false;
    }

  /* Merge the two partitions.  */
  p3 = partition_union (map->var_partition, p1, p2);

  /* Set the root variable of the partition to the better choice, if there is
     one.  */
  if (!ign2)
    replace_ssa_name_symbol (partition_to_var (map, p3), root2);
  else if (!ign1)
    replace_ssa_name_symbol (partition_to_var (map, p3), root1);

  if (debug)
    {
      fprintf (debug, " --> P%d ", p3);
      print_generic_expr (debug, SSA_NAME_VAR (partition_to_var (map, p3)),
			  TDF_SLIM);
      fprintf (debug, "\n");
    }
  return true;
}