コード例 #1
0
ファイル: tree-ssa-address.c プロジェクト: andikleen/gcc
void
copy_ref_info (tree new_ref, tree old_ref)
{
  tree new_ptr_base = NULL_TREE;

  gcc_assert (TREE_CODE (new_ref) == MEM_REF
	      || TREE_CODE (new_ref) == TARGET_MEM_REF);

  TREE_SIDE_EFFECTS (new_ref) = TREE_SIDE_EFFECTS (old_ref);
  TREE_THIS_VOLATILE (new_ref) = TREE_THIS_VOLATILE (old_ref);

  new_ptr_base = TREE_OPERAND (new_ref, 0);

  /* We can transfer points-to information from an old pointer
     or decl base to the new one.  */
  if (new_ptr_base
      && TREE_CODE (new_ptr_base) == SSA_NAME
      && !SSA_NAME_PTR_INFO (new_ptr_base))
    {
      tree base = get_base_address (old_ref);
      if (!base)
	;
      else if ((TREE_CODE (base) == MEM_REF
		|| TREE_CODE (base) == TARGET_MEM_REF)
	       && TREE_CODE (TREE_OPERAND (base, 0)) == SSA_NAME
	       && SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0)))
	{
	  struct ptr_info_def *new_pi;
	  unsigned int align, misalign;

	  duplicate_ssa_name_ptr_info
	    (new_ptr_base, SSA_NAME_PTR_INFO (TREE_OPERAND (base, 0)));
	  new_pi = SSA_NAME_PTR_INFO (new_ptr_base);
	  /* We have to be careful about transferring alignment information.  */
	  if (get_ptr_info_alignment (new_pi, &align, &misalign)
	      && TREE_CODE (old_ref) == MEM_REF
	      && !(TREE_CODE (new_ref) == TARGET_MEM_REF
		   && (TMR_INDEX2 (new_ref)
		       || (TMR_STEP (new_ref)
			   && (TREE_INT_CST_LOW (TMR_STEP (new_ref))
			       < align)))))
	    {
	      unsigned int inc = (mem_ref_offset (old_ref)
				  - mem_ref_offset (new_ref)).low;
	      adjust_ptr_info_misalignment (new_pi, inc);
	    }
	  else
	    mark_ptr_info_alignment_unknown (new_pi);
	}
      else if (TREE_CODE (base) == VAR_DECL
	       || TREE_CODE (base) == PARM_DECL
	       || TREE_CODE (base) == RESULT_DECL)
	{
	  struct ptr_info_def *pi = get_ptr_info (new_ptr_base);
	  pt_solution_set_var (&pi->pt, base);
	}
    }
}
コード例 #2
0
void
get_address_description (tree op, struct mem_address *addr)
{
  addr->symbol = TMR_SYMBOL (op);
  addr->base = TMR_BASE (op);
  addr->index = TMR_INDEX (op);
  addr->step = TMR_STEP (op);
  addr->offset = TMR_OFFSET (op);
}
コード例 #3
0
tree
tree_mem_ref_addr (tree type, tree mem_ref)
{
  tree addr;
  tree act_elem;
  tree step = TMR_STEP (mem_ref), offset = TMR_OFFSET (mem_ref);
  tree sym = TMR_SYMBOL (mem_ref), base = TMR_BASE (mem_ref);
  tree addr_base = NULL_TREE, addr_off = NULL_TREE;

  if (sym)
    addr_base = fold_convert (type, build_addr (sym, current_function_decl));
  else if (base && POINTER_TYPE_P (TREE_TYPE (base)))
    {
      addr_base = fold_convert (type, base);
      base = NULL_TREE;
    }

  act_elem = TMR_INDEX (mem_ref);
  if (act_elem)
    {
      if (step)
	act_elem = fold_build2 (MULT_EXPR, sizetype, act_elem, step);
      addr_off = act_elem;
    }

  act_elem = base;
  if (act_elem)
    {
      if (addr_off)
	addr_off = fold_build2 (PLUS_EXPR, sizetype, addr_off, act_elem);
      else
	addr_off = act_elem;
    }

  if (offset && !integer_zerop (offset))
    {
      if (addr_off)
	addr_off = fold_build2 (PLUS_EXPR, sizetype, addr_off, offset);
      else
	addr_off = offset;
    }

  if (addr_off)
    {
      if (addr_base)
	addr = fold_build2 (POINTER_PLUS_EXPR, type, addr_base, addr_off);
      else
	addr = fold_convert (type, addr_off);
    }
  else if (addr_base)
    addr = addr_base;
  else
    addr = build_int_cst (type, 0);

  return addr;
}
コード例 #4
0
tree
tree_mem_ref_addr (tree type, tree mem_ref)
{
  tree addr;
  tree act_elem;
  tree step = TMR_STEP (mem_ref), offset = TMR_OFFSET (mem_ref);
  tree addr_base = NULL_TREE, addr_off = NULL_TREE;

  addr_base = fold_convert (type, TMR_BASE (mem_ref));

  act_elem = TMR_INDEX (mem_ref);
  if (act_elem)
    {
      if (step)
	act_elem = fold_build2 (MULT_EXPR, TREE_TYPE (act_elem),
				act_elem, step);
      addr_off = act_elem;
    }

  act_elem = TMR_INDEX2 (mem_ref);
  if (act_elem)
    {
      if (addr_off)
	addr_off = fold_build2 (PLUS_EXPR, TREE_TYPE (addr_off),
				addr_off, act_elem);
      else
	addr_off = act_elem;
    }

  if (offset && !integer_zerop (offset))
    {
      if (addr_off)
	addr_off = fold_build2 (PLUS_EXPR, TREE_TYPE (addr_off), addr_off,
				fold_convert (TREE_TYPE (addr_off), offset));
      else
	addr_off = offset;
    }

  if (addr_off)
    addr = fold_build_pointer_plus (addr_base, addr_off);
  else
    addr = addr_base;

  return addr;
}
コード例 #5
0
void
get_address_description (tree op, struct mem_address *addr)
{
  if (TREE_CODE (TMR_BASE (op)) == ADDR_EXPR)
    {
      addr->symbol = TMR_BASE (op);
      addr->base = TMR_INDEX2 (op);
    }
  else
    {
      addr->symbol = NULL_TREE;
      if (TMR_INDEX2 (op))
	{
	  gcc_assert (integer_zerop (TMR_BASE (op)));
	  addr->base = TMR_INDEX2 (op);
	}
      else
	addr->base = TMR_BASE (op);
    }
  addr->index = TMR_INDEX (op);
  addr->step = TMR_STEP (op);
  addr->offset = TMR_OFFSET (op);
}