/* This file contains the definitions and documentation for the common
tree codes used in the GNU C and C++ compilers (see c-common.def
for the standard codes).
- Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2007
+ Free Software Foundation, Inc.
Written by Benjamin Chelf (chelf@codesourcery.com).
This file is part of GCC.
GCC is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License as published by the Free
-Software Foundation; either version 2, or (at your option) any later
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-02111-1307, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
return t;
}
-/* Similarly, except that T may have already been pushed/popped, and
- thus may already contain statement(s). Arrage for new statements
- to be appended. */
-
-tree
-re_push_stmt_list (tree t)
-{
- if (t)
- {
- if (TREE_CODE (t) != STATEMENT_LIST)
- {
- tree u = alloc_stmt_list ();
- append_to_statement_list_force (t, &u);
- t = u;
- }
- }
- else
- t = alloc_stmt_list ();
- TREE_CHAIN (t) = cur_stmt_list;
- cur_stmt_list = t;
- return t;
-}
-
/* Finish the statement tree rooted at T. */
tree
cur_stmt_list = chain;
/* If the statement list is completely empty, just return it. This is
- just as good small as build_empty_stmt, with the advantage that
+ just as good small as build_empty_stmt, with the advantage that
statement lists are merged when they appended to one another. So
using the STATEMENT_LIST avoids pathological buildup of EMPTY_STMT_P
statements. */
return t;
}
-/* T is a statement. Add it to the statement-tree. */
-
-tree
-add_stmt (tree t)
-{
- enum tree_code code = TREE_CODE (t);
-
- if ((EXPR_P (t) || STATEMENT_CODE_P (code)) && code != LABEL_EXPR)
- {
- if (!EXPR_HAS_LOCATION (t))
- SET_EXPR_LOCATION (t, input_location);
-
- /* When we expand a statement-tree, we must know whether or not the
- statements are full-expressions. We record that fact here. */
- STMT_IS_FULL_EXPR_P (t) = stmts_are_full_exprs_p ();
- }
-
- /* Add T to the statement-tree. Non-side-effect statements need to be
- recorded during statement expressions. */
- append_to_statement_list_force (t, &cur_stmt_list);
-
- return t;
-}
-
/* Build a generic statement based on the given type of node and
arguments. Similar to `build_nt', except that we set
EXPR_LOCATION to be the current source location. */
va_list p;
bool side_effects;
+ /* This function cannot be used to construct variably-sized nodes. */
+ gcc_assert (TREE_CODE_CLASS (code) != tcc_vl_exp);
+
va_start (p, code);
ret = make_node (code);
length = TREE_CODE_LENGTH (code);
SET_EXPR_LOCATION (ret, input_location);
- /* Most statements have implicit side effects all on their own,
- such as control transfer. For those that do, we'll compute
- the real value of TREE_SIDE_EFFECTS from its arguments. */
- switch (code)
- {
- case EXPR_STMT:
- side_effects = false;
- break;
- default:
- side_effects = true;
- break;
- }
+ /* TREE_SIDE_EFFECTS will already be set for statements with
+ implicit side effects. Here we make sure it is set for other
+ expressions by checking whether the parameters have side
+ effects. */
+ side_effects = false;
for (i = 0; i < length; i++)
{
tree t = va_arg (p, tree);
- if (t && IS_NON_TYPE_CODE_CLASS (TREE_CODE_CLASS (TREE_CODE (t))))
- side_effects |= TREE_SIDE_EFFECTS (t);
+ if (t && !TYPE_P (t))
+ side_effects |= TREE_SIDE_EFFECTS (t);
TREE_OPERAND (ret, i) = t;
}
- TREE_SIDE_EFFECTS (ret) = side_effects;
+ TREE_SIDE_EFFECTS (ret) |= side_effects;
va_end (p);
return ret;
}
}
-/* Build a break statement node and return it. */
-
-tree
-build_break_stmt (void)
-{
- return (build_stmt (BREAK_STMT));
-}
-
-/* Build a continue statement node and return it. */
-
-tree
-build_continue_stmt (void)
-{
- return (build_stmt (CONTINUE_STMT));
-}
-
/* Create a CASE_LABEL_EXPR tree node and return it. */
tree
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