C++ (Cpp) duplicate_ssa_name_range_info Examples

Example #1

tree
duplicate_ssa_name_fn (struct function *fn, tree name, gimple stmt)
{
  tree new_name = copy_ssa_name_fn (fn, name, stmt);
  if (POINTER_TYPE_P (TREE_TYPE (name)))
    {
      struct ptr_info_def *old_ptr_info = SSA_NAME_PTR_INFO (name);

      if (old_ptr_info)
	duplicate_ssa_name_ptr_info (new_name, old_ptr_info);
    }
  else
    {
      struct range_info_def *old_range_info = SSA_NAME_RANGE_INFO (name);

      if (old_range_info)
	duplicate_ssa_name_range_info (new_name, old_range_info);
    }

  return new_name;
}

Example #2

File: tree-ssa-copy.c Project: hemantjain95/gcc

static bool
fini_copy_prop (void)
{
  unsigned i;

  /* Set the final copy-of value for each variable by traversing the
     copy-of chains.  */
  for (i = 1; i < num_ssa_names; i++)
    {
      tree var = ssa_name (i);
      if (!var
	  || !copy_of[i].value
	  || copy_of[i].value == var)
	continue;

      /* In theory the points-to solution of all members of the
         copy chain is their intersection.  For now we do not bother
	 to compute this but only make sure we do not lose points-to
	 information completely by setting the points-to solution
	 of the representative to the first solution we find if
	 it doesn't have one already.  */
      if (copy_of[i].value != var
	  && TREE_CODE (copy_of[i].value) == SSA_NAME)
	{
	  basic_block copy_of_bb
	    = gimple_bb (SSA_NAME_DEF_STMT (copy_of[i].value));
	  basic_block var_bb = gimple_bb (SSA_NAME_DEF_STMT (var));
	  if (POINTER_TYPE_P (TREE_TYPE (var))
	      && SSA_NAME_PTR_INFO (var)
	      && !SSA_NAME_PTR_INFO (copy_of[i].value))
	    {
	      duplicate_ssa_name_ptr_info (copy_of[i].value,
					   SSA_NAME_PTR_INFO (var));
	      /* Points-to information is cfg insensitive,
		 but alignment info might be cfg sensitive, if it
		 e.g. is derived from VRP derived non-zero bits.
		 So, do not copy alignment info if the two SSA_NAMEs
		 aren't defined in the same basic block.  */
	      if (var_bb != copy_of_bb)
		mark_ptr_info_alignment_unknown
				(SSA_NAME_PTR_INFO (copy_of[i].value));
	    }
	  else if (!POINTER_TYPE_P (TREE_TYPE (var))
		   && SSA_NAME_RANGE_INFO (var)
		   && !SSA_NAME_RANGE_INFO (copy_of[i].value)
		   && var_bb == copy_of_bb)
	    duplicate_ssa_name_range_info (copy_of[i].value,
					   SSA_NAME_RANGE_TYPE (var),
					   SSA_NAME_RANGE_INFO (var));
	}
    }

  bool changed = substitute_and_fold (get_value, NULL, true);
  if (changed)
    {
      free_numbers_of_iterations_estimates ();
      if (scev_initialized_p ())
	scev_reset ();
    }

  free (copy_of);

  return changed;
}