2 * Copyright © 2012 Intel Corporation
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
24 * Eric Anholt <eric@anholt.net>
32 #include "brw_shader.h"
38 DECLARE_RALLOC_CXX_OPERATORS(bblock_link
)
40 bblock_link(bblock_t
*block
)
46 struct exec_node link
;
47 struct bblock_t
*block
;
50 struct backend_instruction
;
54 DECLARE_RALLOC_CXX_OPERATORS(bblock_t
)
56 explicit bblock_t(cfg_t
*cfg
);
58 void add_successor(void *mem_ctx
, bblock_t
*successor
);
59 bool is_predecessor_of(const bblock_t
*block
) const;
60 bool is_successor_of(const bblock_t
*block
) const;
61 bool can_combine_with(const bblock_t
*that
) const;
62 void combine_with(bblock_t
*that
);
63 void dump(backend_shader
*s
) const;
65 backend_instruction
*start();
66 const backend_instruction
*start() const;
67 backend_instruction
*end();
68 const backend_instruction
*end() const;
71 const bblock_t
*next() const;
73 const bblock_t
*prev() const;
75 bool starts_with_control_flow() const;
76 bool ends_with_control_flow() const;
78 backend_instruction
*first_non_control_flow_inst();
79 backend_instruction
*last_non_control_flow_inst();
82 struct exec_node link
;
84 struct bblock_t
*idom
;
89 struct exec_list instructions
;
90 struct exec_list parents
;
91 struct exec_list children
;
97 static inline struct backend_instruction
*
98 bblock_start(struct bblock_t
*block
)
100 return (struct backend_instruction
*)exec_list_get_head(&block
->instructions
);
103 static inline const struct backend_instruction
*
104 bblock_start_const(const struct bblock_t
*block
)
106 return (const struct backend_instruction
*)exec_list_get_head_const(&block
->instructions
);
109 static inline struct backend_instruction
*
110 bblock_end(struct bblock_t
*block
)
112 return (struct backend_instruction
*)exec_list_get_tail(&block
->instructions
);
115 static inline const struct backend_instruction
*
116 bblock_end_const(const struct bblock_t
*block
)
118 return (const struct backend_instruction
*)exec_list_get_tail_const(&block
->instructions
);
121 static inline struct bblock_t
*
122 bblock_next(struct bblock_t
*block
)
124 if (exec_node_is_tail_sentinel(block
->link
.next
))
127 return (struct bblock_t
*)block
->link
.next
;
130 static inline const struct bblock_t
*
131 bblock_next_const(const struct bblock_t
*block
)
133 if (exec_node_is_tail_sentinel(block
->link
.next
))
136 return (const struct bblock_t
*)block
->link
.next
;
139 static inline struct bblock_t
*
140 bblock_prev(struct bblock_t
*block
)
142 if (exec_node_is_head_sentinel(block
->link
.prev
))
145 return (struct bblock_t
*)block
->link
.prev
;
148 static inline const struct bblock_t
*
149 bblock_prev_const(const struct bblock_t
*block
)
151 if (exec_node_is_head_sentinel(block
->link
.prev
))
154 return (const struct bblock_t
*)block
->link
.prev
;
158 bblock_starts_with_control_flow(const struct bblock_t
*block
)
160 enum opcode op
= bblock_start_const(block
)->opcode
;
161 return op
== BRW_OPCODE_DO
|| op
== BRW_OPCODE_ENDIF
;
165 bblock_ends_with_control_flow(const struct bblock_t
*block
)
167 enum opcode op
= bblock_end_const(block
)->opcode
;
168 return op
== BRW_OPCODE_IF
||
169 op
== BRW_OPCODE_ELSE
||
170 op
== BRW_OPCODE_WHILE
||
171 op
== BRW_OPCODE_BREAK
||
172 op
== BRW_OPCODE_CONTINUE
;
175 static inline struct backend_instruction
*
176 bblock_first_non_control_flow_inst(struct bblock_t
*block
)
178 struct backend_instruction
*inst
= bblock_start(block
);
179 if (bblock_starts_with_control_flow(block
))
181 inst
= (struct backend_instruction
*)inst
->next
;
183 inst
= (struct backend_instruction
*)inst
->link
.next
;
188 static inline struct backend_instruction
*
189 bblock_last_non_control_flow_inst(struct bblock_t
*block
)
191 struct backend_instruction
*inst
= bblock_end(block
);
192 if (bblock_ends_with_control_flow(block
))
194 inst
= (struct backend_instruction
*)inst
->prev
;
196 inst
= (struct backend_instruction
*)inst
->link
.prev
;
202 inline backend_instruction
*
205 return bblock_start(this);
208 inline const backend_instruction
*
209 bblock_t::start() const
211 return bblock_start_const(this);
214 inline backend_instruction
*
217 return bblock_end(this);
220 inline const backend_instruction
*
221 bblock_t::end() const
223 return bblock_end_const(this);
229 return bblock_next(this);
232 inline const bblock_t
*
233 bblock_t::next() const
235 return bblock_next_const(this);
241 return bblock_prev(this);
244 inline const bblock_t
*
245 bblock_t::prev() const
247 return bblock_prev_const(this);
251 bblock_t::starts_with_control_flow() const
253 return bblock_starts_with_control_flow(this);
257 bblock_t::ends_with_control_flow() const
259 return bblock_ends_with_control_flow(this);
262 inline backend_instruction
*
263 bblock_t::first_non_control_flow_inst()
265 return bblock_first_non_control_flow_inst(this);
268 inline backend_instruction
*
269 bblock_t::last_non_control_flow_inst()
271 return bblock_last_non_control_flow_inst(this);
277 DECLARE_RALLOC_CXX_OPERATORS(cfg_t
)
279 cfg_t(exec_list
*instructions
);
282 void remove_block(bblock_t
*block
);
284 bblock_t
*new_block();
285 void set_next_block(bblock_t
**cur
, bblock_t
*block
, int ip
);
286 void make_block_array();
287 void calculate_idom();
288 static bblock_t
*intersect(bblock_t
*b1
, bblock_t
*b2
);
290 void dump(backend_shader
*s
);
296 /** Ordered list (by ip) of basic blocks */
297 struct exec_list block_list
;
298 struct bblock_t
**blocks
;
303 unsigned cycle_count
;
306 /* Note that this is implemented with a double for loop -- break will
307 * break from the inner loop only!
309 #define foreach_block_and_inst(__block, __type, __inst, __cfg) \
310 foreach_block (__block, __cfg) \
311 foreach_inst_in_block (__type, __inst, __block)
313 /* Note that this is implemented with a double for loop -- break will
314 * break from the inner loop only!
316 #define foreach_block_and_inst_safe(__block, __type, __inst, __cfg) \
317 foreach_block_safe (__block, __cfg) \
318 foreach_inst_in_block_safe (__type, __inst, __block)
320 #define foreach_block(__block, __cfg) \
321 foreach_list_typed (bblock_t, __block, link, &(__cfg)->block_list)
323 #define foreach_block_reverse(__block, __cfg) \
324 foreach_list_typed_reverse (bblock_t, __block, link, &(__cfg)->block_list)
326 #define foreach_block_safe(__block, __cfg) \
327 foreach_list_typed_safe (bblock_t, __block, link, &(__cfg)->block_list)
329 #define foreach_block_reverse_safe(__block, __cfg) \
330 foreach_list_typed_reverse_safe (bblock_t, __block, link, &(__cfg)->block_list)
332 #define foreach_inst_in_block(__type, __inst, __block) \
333 foreach_in_list(__type, __inst, &(__block)->instructions)
335 #define foreach_inst_in_block_safe(__type, __inst, __block) \
336 for (__type *__inst = (__type *)__block->instructions.head_sentinel.next, \
337 *__next = (__type *)__inst->next; \
340 __next = (__type *)__next->next)
342 #define foreach_inst_in_block_reverse(__type, __inst, __block) \
343 foreach_in_list_reverse(__type, __inst, &(__block)->instructions)
345 #define foreach_inst_in_block_reverse_safe(__type, __inst, __block) \
346 foreach_in_list_reverse_safe(__type, __inst, &(__block)->instructions)
348 #define foreach_inst_in_block_starting_from(__type, __scan_inst, __inst) \
349 for (__type *__scan_inst = (__type *)__inst->next; \
350 !__scan_inst->is_tail_sentinel(); \
351 __scan_inst = (__type *)__scan_inst->next)
353 #define foreach_inst_in_block_reverse_starting_from(__type, __scan_inst, __inst) \
354 for (__type *__scan_inst = (__type *)__inst->prev; \
355 !__scan_inst->is_head_sentinel(); \
356 __scan_inst = (__type *)__scan_inst->prev)
358 #endif /* BRW_CFG_H */