int
cp_gimplify_expr (tree *expr_p, tree *pre_p, tree *post_p)
{
  int saved_stmts_are_full_exprs_p = 0;
  enum tree_code code = TREE_CODE (*expr_p);
  enum gimplify_status ret;

  if (STATEMENT_CODE_P (code))
    {
      saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
      current_stmt_tree ()->stmts_are_full_exprs_p
	= STMT_IS_FULL_EXPR_P (*expr_p);
    }

  switch (code)
    {
    case PTRMEM_CST:
      *expr_p = cplus_expand_constant (*expr_p);
      ret = GS_OK;
      break;

    case AGGR_INIT_EXPR:
      simplify_aggr_init_expr (expr_p);
      ret = GS_OK;
      break;

    case THROW_EXPR:
      /* FIXME communicate throw type to backend, probably by moving
	 THROW_EXPR into ../tree.def.  */
      *expr_p = TREE_OPERAND (*expr_p, 0);
      ret = GS_OK;
      break;

    case MUST_NOT_THROW_EXPR:
      gimplify_must_not_throw_expr (expr_p, pre_p);
      ret = GS_OK;
      break;

      /* We used to do this for MODIFY_EXPR as well, but that's unsafe; the
	 LHS of an assignment might also be involved in the RHS, as in bug
	 25979.  */
    case INIT_EXPR:
      cp_gimplify_init_expr (expr_p, pre_p, post_p);
      ret = GS_OK;
      break;

    case EMPTY_CLASS_EXPR:
      /* We create an empty CONSTRUCTOR with RECORD_TYPE.  */
      *expr_p = build_constructor (TREE_TYPE (*expr_p), NULL);
      ret = GS_OK;
      break;

    case BASELINK:
      *expr_p = BASELINK_FUNCTIONS (*expr_p);
      ret = GS_OK;
      break;

    case TRY_BLOCK:
      genericize_try_block (expr_p);
      ret = GS_OK;
      break;

    case HANDLER:
      genericize_catch_block (expr_p);
      ret = GS_OK;
      break;

    case EH_SPEC_BLOCK:
      genericize_eh_spec_block (expr_p);
      ret = GS_OK;
      break;

    case USING_STMT:
      /* Just ignore for now.  Eventually we will want to pass this on to
	 the debugger.  */
      *expr_p = build_empty_stmt ();
      ret = GS_ALL_DONE;
      break;

    case IF_STMT:
      gimplify_if_stmt (expr_p);
      ret = GS_OK;
      break;

    case FOR_STMT:
      gimplify_for_stmt (expr_p, pre_p);
      ret = GS_ALL_DONE;
      break;

    case WHILE_STMT:
      gimplify_while_stmt (expr_p);
      ret = GS_ALL_DONE;
      break;

    case DO_STMT:
      gimplify_do_stmt (expr_p);
      ret = GS_ALL_DONE;
      break;

    case SWITCH_STMT:
      gimplify_switch_stmt (expr_p);
      ret = GS_ALL_DONE;
      break;

    case CONTINUE_STMT:
      *expr_p = build_bc_goto (bc_continue);
      ret = GS_ALL_DONE;
      break;

    case BREAK_STMT:
      *expr_p = build_bc_goto (bc_break);
      ret = GS_ALL_DONE;
      break;

    case EXPR_STMT:
      gimplify_expr_stmt (expr_p);
      ret = GS_OK;
      break;

    case UNARY_PLUS_EXPR:
      {
	tree arg = TREE_OPERAND (*expr_p, 0);
	tree type = TREE_TYPE (*expr_p);
	*expr_p = (TREE_TYPE (arg) != type) ? fold_convert (type, arg)
					    : arg;
	ret = GS_OK;
      }
      break;

    default:
      ret = c_gimplify_expr (expr_p, pre_p, post_p);
      break;
    }

  /* Restore saved state.  */
  if (STATEMENT_CODE_P (code))
    current_stmt_tree ()->stmts_are_full_exprs_p
      = saved_stmts_are_full_exprs_p;

  return ret;
}
Пример #2
0
int
cp_gimplify_expr (tree *expr_p, tree *pre_p, tree *post_p)
{
  int saved_stmts_are_full_exprs_p = 0;
  enum tree_code code = TREE_CODE (*expr_p);
  enum gimplify_status ret;

  if (STATEMENT_CODE_P (code))
    {
      saved_stmts_are_full_exprs_p = stmts_are_full_exprs_p ();
      current_stmt_tree ()->stmts_are_full_exprs_p
	= STMT_IS_FULL_EXPR_P (*expr_p);
    }

  switch (code)
    {
    case PTRMEM_CST:
      *expr_p = cplus_expand_constant (*expr_p);
      ret = GS_OK;
      break;

    case AGGR_INIT_EXPR:
      simplify_aggr_init_expr (expr_p);
      ret = GS_OK;
      break;

    case THROW_EXPR:
      /* FIXME communicate throw type to backend, probably by moving
	 THROW_EXPR into ../tree.def.  */
      *expr_p = TREE_OPERAND (*expr_p, 0);
      ret = GS_OK;
      break;

    case MUST_NOT_THROW_EXPR:
      gimplify_must_not_throw_expr (expr_p, pre_p);
      ret = GS_OK;
      break;

    case INIT_EXPR:
    case MODIFY_EXPR:
      cp_gimplify_init_expr (expr_p, pre_p, post_p);
      ret = GS_OK;
      break;

    case EMPTY_CLASS_EXPR:
      /* We create an INTEGER_CST with RECORD_TYPE and value zero.  */
      *expr_p = build_int_cst (TREE_TYPE (*expr_p), 0);
      ret = GS_OK;
      break;

    case BASELINK:
      *expr_p = BASELINK_FUNCTIONS (*expr_p);
      ret = GS_OK;
      break;

    case TRY_BLOCK:
      genericize_try_block (expr_p);
      ret = GS_OK;
      break;

    case HANDLER:
      genericize_catch_block (expr_p);
      ret = GS_OK;
      break;

    case EH_SPEC_BLOCK:
      genericize_eh_spec_block (expr_p);
      ret = GS_OK;
      break;

    case USING_STMT:
      /* Just ignore for now.  Eventually we will want to pass this on to
	 the debugger.  */
      *expr_p = build_empty_stmt ();
      ret = GS_ALL_DONE;
      break;

    case IF_STMT:
      gimplify_if_stmt (expr_p);
      ret = GS_OK;
      break;

    default:
      ret = c_gimplify_expr (expr_p, pre_p, post_p);
      break;
    }

  /* Restore saved state.  */
  if (STATEMENT_CODE_P (code))
    current_stmt_tree ()->stmts_are_full_exprs_p
      = saved_stmts_are_full_exprs_p;

  return ret;
}