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f4ce02c5 | 1 | /* Iterator routines for manipulating GENERIC tree statement list. |
8d9254fc | 2 | Copyright (C) 2003-2020 Free Software Foundation, Inc. |
6de9cd9a DN |
3 | Contributed by Andrew MacLeod <amacleod@redhat.com> |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9dcd6f09 | 9 | the Free Software Foundation; either version 3, or (at your option) |
6de9cd9a DN |
10 | any later version. |
11 | ||
12 | GCC is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
6de9cd9a DN |
20 | |
21 | ||
22 | /* This file is dependent upon the implementation of tree's. It provides an | |
23 | abstract interface to the tree objects such that if all tree creation and | |
24 | manipulations are done through this interface, we can easily change the | |
25 | implementation of tree's, and not impact other code. */ | |
26 | ||
27 | #ifndef GCC_TREE_ITERATOR_H | |
28 | #define GCC_TREE_ITERATOR_H 1 | |
29 | ||
30 | /* Iterator object for GENERIC or GIMPLE TREE statements. */ | |
31 | ||
84562394 | 32 | struct tree_stmt_iterator { |
6de9cd9a DN |
33 | struct tree_statement_list_node *ptr; |
34 | tree container; | |
84562394 | 35 | }; |
6de9cd9a DN |
36 | |
37 | static inline tree_stmt_iterator | |
38 | tsi_start (tree t) | |
39 | { | |
40 | tree_stmt_iterator i; | |
41 | ||
42 | i.ptr = STATEMENT_LIST_HEAD (t); | |
43 | i.container = t; | |
44 | ||
45 | return i; | |
46 | } | |
47 | ||
48 | static inline tree_stmt_iterator | |
49 | tsi_last (tree t) | |
50 | { | |
51 | tree_stmt_iterator i; | |
52 | ||
53 | i.ptr = STATEMENT_LIST_TAIL (t); | |
54 | i.container = t; | |
55 | ||
56 | return i; | |
57 | } | |
58 | ||
59 | static inline bool | |
60 | tsi_end_p (tree_stmt_iterator i) | |
61 | { | |
62 | return i.ptr == NULL; | |
63 | } | |
64 | ||
65 | static inline bool | |
66 | tsi_one_before_end_p (tree_stmt_iterator i) | |
67 | { | |
68 | return i.ptr != NULL && i.ptr->next == NULL; | |
69 | } | |
70 | ||
71 | static inline void | |
72 | tsi_next (tree_stmt_iterator *i) | |
73 | { | |
74 | i->ptr = i->ptr->next; | |
75 | } | |
76 | ||
77 | static inline void | |
78 | tsi_prev (tree_stmt_iterator *i) | |
79 | { | |
80 | i->ptr = i->ptr->prev; | |
81 | } | |
82 | ||
83 | static inline tree * | |
84 | tsi_stmt_ptr (tree_stmt_iterator i) | |
85 | { | |
86 | return &i.ptr->stmt; | |
87 | } | |
88 | ||
89 | static inline tree | |
90 | tsi_stmt (tree_stmt_iterator i) | |
91 | { | |
92 | return i.ptr->stmt; | |
93 | } | |
94 | ||
95 | enum tsi_iterator_update | |
96 | { | |
00b847e3 | 97 | TSI_NEW_STMT, /* Only valid when single statement is added, move |
6de9cd9a | 98 | iterator to it. */ |
00b847e3 | 99 | TSI_SAME_STMT, /* Leave the iterator at the same statement. */ |
6de9cd9a DN |
100 | TSI_CHAIN_START, /* Only valid when chain of statements is added, move |
101 | iterator to the first statement in the chain. */ | |
102 | TSI_CHAIN_END, /* Only valid when chain of statements is added, move | |
103 | iterator to the last statement in the chain. */ | |
104 | TSI_CONTINUE_LINKING /* Move iterator to whatever position is suitable for | |
105 | linking other statements/chains of statements in | |
106 | the same direction. */ | |
107 | }; | |
108 | ||
109 | extern void tsi_link_before (tree_stmt_iterator *, tree, | |
110 | enum tsi_iterator_update); | |
111 | extern void tsi_link_after (tree_stmt_iterator *, tree, | |
112 | enum tsi_iterator_update); | |
113 | ||
f4ce02c5 | 114 | extern void tsi_delink (tree_stmt_iterator *); |
6de9cd9a | 115 | |
f4ce02c5 SB |
116 | extern tree alloc_stmt_list (void); |
117 | extern void free_stmt_list (tree); | |
118 | extern void append_to_statement_list (tree, tree *); | |
119 | extern void append_to_statement_list_force (tree, tree *); | |
d8a2d370 DN |
120 | extern tree expr_first (tree); |
121 | extern tree expr_last (tree); | |
aae5d08a | 122 | extern tree expr_single (tree); |
325c3691 | 123 | |
6de9cd9a | 124 | #endif /* GCC_TREE_ITERATOR_H */ |