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dcf1a1ec | 1 | /* Header file for gimple iterators. |
3aea1f79 | 2 | Copyright (C) 2013-2014 Free Software Foundation, Inc. |
dcf1a1ec | 3 | |
4 | This file is part of GCC. | |
5 | ||
6 | GCC is free software; you can redistribute it and/or modify it under | |
7 | the terms of the GNU General Public License as published by the Free | |
8 | Software Foundation; either version 3, or (at your option) any later | |
9 | version. | |
10 | ||
11 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
13 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
14 | for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with GCC; see the file COPYING3. If not see | |
18 | <http://www.gnu.org/licenses/>. */ | |
19 | ||
20 | #ifndef GCC_GIMPLE_ITERATOR_H | |
21 | #define GCC_GIMPLE_ITERATOR_H | |
22 | ||
23 | /* Iterator object for GIMPLE statement sequences. */ | |
24 | ||
b3e7c666 | 25 | struct gimple_stmt_iterator |
dcf1a1ec | 26 | { |
27 | /* Sequence node holding the current statement. */ | |
28 | gimple_seq_node ptr; | |
29 | ||
30 | /* Sequence and basic block holding the statement. These fields | |
31 | are necessary to handle edge cases such as when statement is | |
32 | added to an empty basic block or when the last statement of a | |
33 | block/sequence is removed. */ | |
34 | gimple_seq *seq; | |
35 | basic_block bb; | |
b3e7c666 | 36 | }; |
1a91d914 | 37 | |
38 | /* Iterator over GIMPLE_PHI statements. */ | |
39 | struct gphi_iterator : public gimple_stmt_iterator | |
40 | { | |
41 | gphi *phi () const | |
42 | { | |
43 | return as_a <gphi *> (ptr); | |
44 | } | |
45 | }; | |
dcf1a1ec | 46 | |
e795d6e1 | 47 | enum gsi_iterator_update |
48 | { | |
49 | GSI_NEW_STMT, /* Only valid when single statement is added, move | |
50 | iterator to it. */ | |
51 | GSI_SAME_STMT, /* Leave the iterator at the same statement. */ | |
52 | GSI_CONTINUE_LINKING /* Move iterator to whatever position is suitable | |
53 | for linking other statements in the same | |
54 | direction. */ | |
55 | }; | |
56 | ||
dcf1a1ec | 57 | extern void gsi_insert_seq_before_without_update (gimple_stmt_iterator *, |
58 | gimple_seq, | |
59 | enum gsi_iterator_update); | |
60 | extern void gsi_insert_seq_before (gimple_stmt_iterator *, gimple_seq, | |
61 | enum gsi_iterator_update); | |
62 | extern void gsi_insert_seq_after_without_update (gimple_stmt_iterator *, | |
63 | gimple_seq, | |
64 | enum gsi_iterator_update); | |
65 | extern void gsi_insert_seq_after (gimple_stmt_iterator *, gimple_seq, | |
66 | enum gsi_iterator_update); | |
67 | extern gimple_seq gsi_split_seq_after (gimple_stmt_iterator); | |
68 | extern void gsi_set_stmt (gimple_stmt_iterator *, gimple); | |
69 | extern void gsi_split_seq_before (gimple_stmt_iterator *, gimple_seq *); | |
258bd648 | 70 | extern bool gsi_replace (gimple_stmt_iterator *, gimple, bool); |
dcf1a1ec | 71 | extern void gsi_replace_with_seq (gimple_stmt_iterator *, gimple_seq, bool); |
72 | extern void gsi_insert_before_without_update (gimple_stmt_iterator *, gimple, | |
73 | enum gsi_iterator_update); | |
74 | extern void gsi_insert_before (gimple_stmt_iterator *, gimple, | |
75 | enum gsi_iterator_update); | |
76 | extern void gsi_insert_after_without_update (gimple_stmt_iterator *, gimple, | |
77 | enum gsi_iterator_update); | |
78 | extern void gsi_insert_after (gimple_stmt_iterator *, gimple, | |
79 | enum gsi_iterator_update); | |
80 | extern bool gsi_remove (gimple_stmt_iterator *, bool); | |
81 | extern gimple_stmt_iterator gsi_for_stmt (gimple); | |
1a91d914 | 82 | extern gphi_iterator gsi_for_phi (gphi *); |
dcf1a1ec | 83 | extern void gsi_move_after (gimple_stmt_iterator *, gimple_stmt_iterator *); |
84 | extern void gsi_move_before (gimple_stmt_iterator *, gimple_stmt_iterator *); | |
85 | extern void gsi_move_to_bb_end (gimple_stmt_iterator *, basic_block); | |
86 | extern void gsi_insert_on_edge (edge, gimple); | |
87 | extern void gsi_insert_seq_on_edge (edge, gimple_seq); | |
88 | extern basic_block gsi_insert_on_edge_immediate (edge, gimple); | |
89 | extern basic_block gsi_insert_seq_on_edge_immediate (edge, gimple_seq); | |
90 | extern void gsi_commit_edge_inserts (void); | |
91 | extern void gsi_commit_one_edge_insert (edge, basic_block *); | |
1a91d914 | 92 | extern gphi_iterator gsi_start_phis (basic_block); |
dcf1a1ec | 93 | |
94 | /* Return a new iterator pointing to GIMPLE_SEQ's first statement. */ | |
95 | ||
96 | static inline gimple_stmt_iterator | |
97 | gsi_start_1 (gimple_seq *seq) | |
98 | { | |
99 | gimple_stmt_iterator i; | |
100 | ||
101 | i.ptr = gimple_seq_first (*seq); | |
102 | i.seq = seq; | |
103 | i.bb = i.ptr ? gimple_bb (i.ptr) : NULL; | |
104 | ||
105 | return i; | |
106 | } | |
107 | ||
108 | #define gsi_start(x) gsi_start_1 (&(x)) | |
109 | ||
110 | static inline gimple_stmt_iterator | |
111 | gsi_none (void) | |
112 | { | |
113 | gimple_stmt_iterator i; | |
114 | i.ptr = NULL; | |
115 | i.seq = NULL; | |
116 | i.bb = NULL; | |
117 | return i; | |
118 | } | |
119 | ||
120 | /* Return a new iterator pointing to the first statement in basic block BB. */ | |
121 | ||
122 | static inline gimple_stmt_iterator | |
123 | gsi_start_bb (basic_block bb) | |
124 | { | |
125 | gimple_stmt_iterator i; | |
126 | gimple_seq *seq; | |
127 | ||
128 | seq = bb_seq_addr (bb); | |
129 | i.ptr = gimple_seq_first (*seq); | |
130 | i.seq = seq; | |
131 | i.bb = bb; | |
132 | ||
133 | return i; | |
134 | } | |
135 | ||
1605ba4b | 136 | gimple_stmt_iterator gsi_start_edge (edge e); |
137 | ||
dcf1a1ec | 138 | /* Return a new iterator initially pointing to GIMPLE_SEQ's last statement. */ |
139 | ||
140 | static inline gimple_stmt_iterator | |
141 | gsi_last_1 (gimple_seq *seq) | |
142 | { | |
143 | gimple_stmt_iterator i; | |
144 | ||
145 | i.ptr = gimple_seq_last (*seq); | |
146 | i.seq = seq; | |
147 | i.bb = i.ptr ? gimple_bb (i.ptr) : NULL; | |
148 | ||
149 | return i; | |
150 | } | |
151 | ||
152 | #define gsi_last(x) gsi_last_1 (&(x)) | |
153 | ||
154 | /* Return a new iterator pointing to the last statement in basic block BB. */ | |
155 | ||
156 | static inline gimple_stmt_iterator | |
157 | gsi_last_bb (basic_block bb) | |
158 | { | |
159 | gimple_stmt_iterator i; | |
160 | gimple_seq *seq; | |
161 | ||
162 | seq = bb_seq_addr (bb); | |
163 | i.ptr = gimple_seq_last (*seq); | |
164 | i.seq = seq; | |
165 | i.bb = bb; | |
166 | ||
167 | return i; | |
168 | } | |
169 | ||
170 | /* Return true if I is at the end of its sequence. */ | |
171 | ||
172 | static inline bool | |
173 | gsi_end_p (gimple_stmt_iterator i) | |
174 | { | |
175 | return i.ptr == NULL; | |
176 | } | |
177 | ||
178 | /* Return true if I is one statement before the end of its sequence. */ | |
179 | ||
180 | static inline bool | |
181 | gsi_one_before_end_p (gimple_stmt_iterator i) | |
182 | { | |
de6bd75e | 183 | return i.ptr != NULL && i.ptr->next == NULL; |
dcf1a1ec | 184 | } |
185 | ||
186 | /* Advance the iterator to the next gimple statement. */ | |
187 | ||
188 | static inline void | |
189 | gsi_next (gimple_stmt_iterator *i) | |
190 | { | |
de6bd75e | 191 | i->ptr = i->ptr->next; |
dcf1a1ec | 192 | } |
193 | ||
194 | /* Advance the iterator to the previous gimple statement. */ | |
195 | ||
196 | static inline void | |
197 | gsi_prev (gimple_stmt_iterator *i) | |
198 | { | |
de6bd75e | 199 | gimple prev = i->ptr->prev; |
200 | if (prev->next) | |
dcf1a1ec | 201 | i->ptr = prev; |
202 | else | |
203 | i->ptr = NULL; | |
204 | } | |
205 | ||
206 | /* Return the current stmt. */ | |
207 | ||
208 | static inline gimple | |
209 | gsi_stmt (gimple_stmt_iterator i) | |
210 | { | |
211 | return i.ptr; | |
212 | } | |
213 | ||
214 | /* Return a block statement iterator that points to the first non-label | |
215 | statement in block BB. */ | |
216 | ||
217 | static inline gimple_stmt_iterator | |
218 | gsi_after_labels (basic_block bb) | |
219 | { | |
220 | gimple_stmt_iterator gsi = gsi_start_bb (bb); | |
221 | ||
222 | while (!gsi_end_p (gsi) && gimple_code (gsi_stmt (gsi)) == GIMPLE_LABEL) | |
223 | gsi_next (&gsi); | |
224 | ||
225 | return gsi; | |
226 | } | |
227 | ||
228 | /* Advance the iterator to the next non-debug gimple statement. */ | |
229 | ||
230 | static inline void | |
231 | gsi_next_nondebug (gimple_stmt_iterator *i) | |
232 | { | |
233 | do | |
234 | { | |
235 | gsi_next (i); | |
236 | } | |
237 | while (!gsi_end_p (*i) && is_gimple_debug (gsi_stmt (*i))); | |
238 | } | |
239 | ||
240 | /* Advance the iterator to the next non-debug gimple statement. */ | |
241 | ||
242 | static inline void | |
243 | gsi_prev_nondebug (gimple_stmt_iterator *i) | |
244 | { | |
245 | do | |
246 | { | |
247 | gsi_prev (i); | |
248 | } | |
249 | while (!gsi_end_p (*i) && is_gimple_debug (gsi_stmt (*i))); | |
250 | } | |
251 | ||
252 | /* Return a new iterator pointing to the first non-debug statement in | |
253 | basic block BB. */ | |
254 | ||
255 | static inline gimple_stmt_iterator | |
256 | gsi_start_nondebug_bb (basic_block bb) | |
257 | { | |
258 | gimple_stmt_iterator i = gsi_start_bb (bb); | |
259 | ||
260 | if (!gsi_end_p (i) && is_gimple_debug (gsi_stmt (i))) | |
261 | gsi_next_nondebug (&i); | |
262 | ||
263 | return i; | |
264 | } | |
265 | ||
266 | /* Return a new iterator pointing to the first non-debug non-label statement in | |
267 | basic block BB. */ | |
268 | ||
269 | static inline gimple_stmt_iterator | |
270 | gsi_start_nondebug_after_labels_bb (basic_block bb) | |
271 | { | |
272 | gimple_stmt_iterator i = gsi_after_labels (bb); | |
273 | ||
274 | if (!gsi_end_p (i) && is_gimple_debug (gsi_stmt (i))) | |
275 | gsi_next_nondebug (&i); | |
276 | ||
277 | return i; | |
278 | } | |
279 | ||
280 | /* Return a new iterator pointing to the last non-debug statement in | |
281 | basic block BB. */ | |
282 | ||
283 | static inline gimple_stmt_iterator | |
284 | gsi_last_nondebug_bb (basic_block bb) | |
285 | { | |
286 | gimple_stmt_iterator i = gsi_last_bb (bb); | |
287 | ||
288 | if (!gsi_end_p (i) && is_gimple_debug (gsi_stmt (i))) | |
289 | gsi_prev_nondebug (&i); | |
290 | ||
291 | return i; | |
292 | } | |
293 | ||
09809ecc | 294 | /* Iterates I statement iterator to the next non-virtual statement. */ |
295 | ||
296 | static inline void | |
1a91d914 | 297 | gsi_next_nonvirtual_phi (gphi_iterator *i) |
09809ecc | 298 | { |
1a91d914 | 299 | gphi *phi; |
09809ecc | 300 | |
301 | if (gsi_end_p (*i)) | |
302 | return; | |
303 | ||
1a91d914 | 304 | phi = i->phi (); |
09809ecc | 305 | gcc_assert (phi != NULL); |
306 | ||
307 | while (virtual_operand_p (gimple_phi_result (phi))) | |
308 | { | |
309 | gsi_next (i); | |
310 | ||
311 | if (gsi_end_p (*i)) | |
312 | return; | |
313 | ||
1a91d914 | 314 | phi = i->phi (); |
09809ecc | 315 | } |
316 | } | |
317 | ||
dcf1a1ec | 318 | /* Return the basic block associated with this iterator. */ |
319 | ||
320 | static inline basic_block | |
321 | gsi_bb (gimple_stmt_iterator i) | |
322 | { | |
323 | return i.bb; | |
324 | } | |
325 | ||
326 | /* Return the sequence associated with this iterator. */ | |
327 | ||
328 | static inline gimple_seq | |
329 | gsi_seq (gimple_stmt_iterator i) | |
330 | { | |
331 | return *i.seq; | |
332 | } | |
333 | ||
334 | #endif /* GCC_GIMPLE_ITERATOR_H */ |