124 lines
3.2 KiB
C
124 lines
3.2 KiB
C
/* Iterator routines for manipulating GENERIC and GIMPLE tree statements.
|
|
Copyright (C) 2003, 2004 Free Software Foundation, Inc.
|
|
Contributed by Andrew MacLeod <amacleod@redhat.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 version.
|
|
|
|
GCC is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License 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, 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
|
|
/* This file is dependent upon the implementation of tree's. It provides an
|
|
abstract interface to the tree objects such that if all tree creation and
|
|
manipulations are done through this interface, we can easily change the
|
|
implementation of tree's, and not impact other code. */
|
|
|
|
#ifndef GCC_TREE_ITERATOR_H
|
|
#define GCC_TREE_ITERATOR_H 1
|
|
|
|
/* Iterator object for GENERIC or GIMPLE TREE statements. */
|
|
|
|
typedef struct {
|
|
struct tree_statement_list_node *ptr;
|
|
tree container;
|
|
} tree_stmt_iterator;
|
|
|
|
static inline tree_stmt_iterator
|
|
tsi_start (tree t)
|
|
{
|
|
tree_stmt_iterator i;
|
|
|
|
i.ptr = STATEMENT_LIST_HEAD (t);
|
|
i.container = t;
|
|
|
|
return i;
|
|
}
|
|
|
|
static inline tree_stmt_iterator
|
|
tsi_last (tree t)
|
|
{
|
|
tree_stmt_iterator i;
|
|
|
|
i.ptr = STATEMENT_LIST_TAIL (t);
|
|
i.container = t;
|
|
|
|
return i;
|
|
}
|
|
|
|
static inline bool
|
|
tsi_end_p (tree_stmt_iterator i)
|
|
{
|
|
return i.ptr == NULL;
|
|
}
|
|
|
|
static inline bool
|
|
tsi_one_before_end_p (tree_stmt_iterator i)
|
|
{
|
|
return i.ptr != NULL && i.ptr->next == NULL;
|
|
}
|
|
|
|
static inline void
|
|
tsi_next (tree_stmt_iterator *i)
|
|
{
|
|
i->ptr = i->ptr->next;
|
|
}
|
|
|
|
static inline void
|
|
tsi_prev (tree_stmt_iterator *i)
|
|
{
|
|
i->ptr = i->ptr->prev;
|
|
}
|
|
|
|
static inline tree *
|
|
tsi_stmt_ptr (tree_stmt_iterator i)
|
|
{
|
|
return &i.ptr->stmt;
|
|
}
|
|
|
|
static inline tree
|
|
tsi_stmt (tree_stmt_iterator i)
|
|
{
|
|
return i.ptr->stmt;
|
|
}
|
|
|
|
enum tsi_iterator_update
|
|
{
|
|
TSI_NEW_STMT, /* Only valid when single statement is added, move
|
|
iterator to it. */
|
|
TSI_SAME_STMT, /* Leave the iterator at the same statement. */
|
|
TSI_CHAIN_START, /* Only valid when chain of statements is added, move
|
|
iterator to the first statement in the chain. */
|
|
TSI_CHAIN_END, /* Only valid when chain of statements is added, move
|
|
iterator to the last statement in the chain. */
|
|
TSI_CONTINUE_LINKING /* Move iterator to whatever position is suitable for
|
|
linking other statements/chains of statements in
|
|
the same direction. */
|
|
};
|
|
|
|
extern void tsi_link_before (tree_stmt_iterator *, tree,
|
|
enum tsi_iterator_update);
|
|
extern void tsi_link_after (tree_stmt_iterator *, tree,
|
|
enum tsi_iterator_update);
|
|
|
|
void tsi_delink (tree_stmt_iterator *);
|
|
|
|
tree tsi_split_statement_list_after (const tree_stmt_iterator *);
|
|
tree tsi_split_statement_list_before (tree_stmt_iterator *);
|
|
|
|
void append_to_statement_list (tree, tree *);
|
|
void append_to_statement_list_force (tree, tree *);
|
|
|
|
#endif /* GCC_TREE_ITERATOR_H */
|