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
;
95 static inline struct backend_instruction
*
96 bblock_start(struct bblock_t
*block
)
98 return (struct backend_instruction
*)exec_list_get_head(&block
->instructions
);
101 static inline const struct backend_instruction
*
102 bblock_start_const(const struct bblock_t
*block
)
104 return (const struct backend_instruction
*)exec_list_get_head_const(&block
->instructions
);
107 static inline struct backend_instruction
*
108 bblock_end(struct bblock_t
*block
)
110 return (struct backend_instruction
*)exec_list_get_tail(&block
->instructions
);
113 static inline const struct backend_instruction
*
114 bblock_end_const(const struct bblock_t
*block
)
116 return (const struct backend_instruction
*)exec_list_get_tail_const(&block
->instructions
);
119 static inline struct bblock_t
*
120 bblock_next(struct bblock_t
*block
)
122 return (struct bblock_t
*)block
->link
.next
;
125 static inline const struct bblock_t
*
126 bblock_next_const(const struct bblock_t
*block
)
128 return (const struct bblock_t
*)block
->link
.next
;
131 static inline struct bblock_t
*
132 bblock_prev(struct bblock_t
*block
)
134 return (struct bblock_t
*)block
->link
.prev
;
137 static inline const struct bblock_t
*
138 bblock_prev_const(const struct bblock_t
*block
)
140 return (const struct bblock_t
*)block
->link
.prev
;
144 bblock_starts_with_control_flow(const struct bblock_t
*block
)
146 enum opcode op
= bblock_start_const(block
)->opcode
;
147 return op
== BRW_OPCODE_DO
|| op
== BRW_OPCODE_ENDIF
;
151 bblock_ends_with_control_flow(const struct bblock_t
*block
)
153 enum opcode op
= bblock_end_const(block
)->opcode
;
154 return op
== BRW_OPCODE_IF
||
155 op
== BRW_OPCODE_ELSE
||
156 op
== BRW_OPCODE_WHILE
||
157 op
== BRW_OPCODE_BREAK
||
158 op
== BRW_OPCODE_CONTINUE
;
161 static inline struct backend_instruction
*
162 bblock_first_non_control_flow_inst(struct bblock_t
*block
)
164 struct backend_instruction
*inst
= bblock_start(block
);
165 if (bblock_starts_with_control_flow(block
))
167 inst
= (struct backend_instruction
*)inst
->next
;
169 inst
= (struct backend_instruction
*)inst
->link
.next
;
174 static inline struct backend_instruction
*
175 bblock_last_non_control_flow_inst(struct bblock_t
*block
)
177 struct backend_instruction
*inst
= bblock_end(block
);
178 if (bblock_ends_with_control_flow(block
))
180 inst
= (struct backend_instruction
*)inst
->prev
;
182 inst
= (struct backend_instruction
*)inst
->link
.prev
;
188 inline backend_instruction
*
191 return bblock_start(this);
194 inline const backend_instruction
*
195 bblock_t::start() const
197 return bblock_start_const(this);
200 inline backend_instruction
*
203 return bblock_end(this);
206 inline const backend_instruction
*
207 bblock_t::end() const
209 return bblock_end_const(this);
215 return bblock_next(this);
218 inline const bblock_t
*
219 bblock_t::next() const
221 return bblock_next_const(this);
227 return bblock_prev(this);
230 inline const bblock_t
*
231 bblock_t::prev() const
233 return bblock_prev_const(this);
237 bblock_t::starts_with_control_flow() const
239 return bblock_starts_with_control_flow(this);
243 bblock_t::ends_with_control_flow() const
245 return bblock_ends_with_control_flow(this);
248 inline backend_instruction
*
249 bblock_t::first_non_control_flow_inst()
251 return bblock_first_non_control_flow_inst(this);
254 inline backend_instruction
*
255 bblock_t::last_non_control_flow_inst()
257 return bblock_last_non_control_flow_inst(this);
263 DECLARE_RALLOC_CXX_OPERATORS(cfg_t
)
265 cfg_t(exec_list
*instructions
);
268 void remove_block(bblock_t
*block
);
270 bblock_t
*new_block();
271 void set_next_block(bblock_t
**cur
, bblock_t
*block
, int ip
);
272 void make_block_array();
273 void calculate_idom();
274 static bblock_t
*intersect(bblock_t
*b1
, bblock_t
*b2
);
276 void dump(backend_shader
*s
);
282 /** Ordered list (by ip) of basic blocks */
283 struct exec_list block_list
;
284 struct bblock_t
**blocks
;
290 /* Note that this is implemented with a double for loop -- break will
291 * break from the inner loop only!
293 #define foreach_block_and_inst(__block, __type, __inst, __cfg) \
294 foreach_block (__block, __cfg) \
295 foreach_inst_in_block (__type, __inst, __block)
297 /* Note that this is implemented with a double for loop -- break will
298 * break from the inner loop only!
300 #define foreach_block_and_inst_safe(__block, __type, __inst, __cfg) \
301 foreach_block_safe (__block, __cfg) \
302 foreach_inst_in_block_safe (__type, __inst, __block)
304 #define foreach_block(__block, __cfg) \
305 foreach_list_typed (bblock_t, __block, link, &(__cfg)->block_list)
307 #define foreach_block_reverse(__block, __cfg) \
308 foreach_list_typed_reverse (bblock_t, __block, link, &(__cfg)->block_list)
310 #define foreach_block_safe(__block, __cfg) \
311 foreach_list_typed_safe (bblock_t, __block, link, &(__cfg)->block_list)
313 #define foreach_inst_in_block(__type, __inst, __block) \
314 foreach_in_list(__type, __inst, &(__block)->instructions)
316 #define foreach_inst_in_block_safe(__type, __inst, __block) \
317 for (__type *__inst = (__type *)__block->instructions.head, \
318 *__next = (__type *)__inst->next, \
319 *__end = (__type *)__block->instructions.tail; \
322 __next = (__type *)__next->next)
324 #define foreach_inst_in_block_reverse(__type, __inst, __block) \
325 foreach_in_list_reverse(__type, __inst, &(__block)->instructions)
327 #define foreach_inst_in_block_reverse_safe(__type, __inst, __block) \
328 foreach_in_list_reverse_safe(__type, __inst, &(__block)->instructions)
330 #define foreach_inst_in_block_starting_from(__type, __scan_inst, __inst, __block) \
331 for (__type *__scan_inst = (__type *)__inst->next; \
332 !__scan_inst->is_tail_sentinel(); \
333 __scan_inst = (__type *)__scan_inst->next)
335 #define foreach_inst_in_block_reverse_starting_from(__type, __scan_inst, __inst, __block) \
336 for (__type *__scan_inst = (__type *)__inst->prev; \
337 !__scan_inst->is_head_sentinel(); \
338 __scan_inst = (__type *)__scan_inst->prev)
340 #endif /* BRW_CFG_H */