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>
31 #include "brw_shader.h"
37 DECLARE_RALLOC_CXX_OPERATORS(bblock_link
)
39 bblock_link(bblock_t
*block
)
45 struct exec_node link
;
46 struct bblock_t
*block
;
49 struct backend_instruction
;
53 DECLARE_RALLOC_CXX_OPERATORS(bblock_t
)
55 explicit bblock_t(cfg_t
*cfg
);
57 void add_successor(void *mem_ctx
, bblock_t
*successor
);
58 bool is_predecessor_of(const bblock_t
*block
) const;
59 bool is_successor_of(const bblock_t
*block
) const;
60 bool can_combine_with(const bblock_t
*that
) const;
61 void combine_with(bblock_t
*that
);
62 void dump(backend_shader
*s
) const;
64 backend_instruction
*start();
65 const backend_instruction
*start() const;
66 backend_instruction
*end();
67 const backend_instruction
*end() const;
70 const bblock_t
*next() const;
72 const bblock_t
*prev() const;
74 bool starts_with_control_flow() const;
75 bool ends_with_control_flow() const;
77 backend_instruction
*first_non_control_flow_inst();
78 backend_instruction
*last_non_control_flow_inst();
81 struct exec_node link
;
83 struct bblock_t
*idom
;
88 struct exec_list instructions
;
89 struct exec_list parents
;
90 struct exec_list children
;
96 static inline struct backend_instruction
*
97 bblock_start(struct bblock_t
*block
)
99 return (struct backend_instruction
*)exec_list_get_head(&block
->instructions
);
102 static inline const struct backend_instruction
*
103 bblock_start_const(const struct bblock_t
*block
)
105 return (const struct backend_instruction
*)exec_list_get_head_const(&block
->instructions
);
108 static inline struct backend_instruction
*
109 bblock_end(struct bblock_t
*block
)
111 return (struct backend_instruction
*)exec_list_get_tail(&block
->instructions
);
114 static inline const struct backend_instruction
*
115 bblock_end_const(const struct bblock_t
*block
)
117 return (const struct backend_instruction
*)exec_list_get_tail_const(&block
->instructions
);
120 static inline struct bblock_t
*
121 bblock_next(struct bblock_t
*block
)
123 if (exec_node_is_tail_sentinel(block
->link
.next
))
126 return (struct bblock_t
*)block
->link
.next
;
129 static inline const struct bblock_t
*
130 bblock_next_const(const struct bblock_t
*block
)
132 if (exec_node_is_tail_sentinel(block
->link
.next
))
135 return (const struct bblock_t
*)block
->link
.next
;
138 static inline struct bblock_t
*
139 bblock_prev(struct bblock_t
*block
)
141 if (exec_node_is_head_sentinel(block
->link
.prev
))
144 return (struct bblock_t
*)block
->link
.prev
;
147 static inline const struct bblock_t
*
148 bblock_prev_const(const struct bblock_t
*block
)
150 if (exec_node_is_head_sentinel(block
->link
.prev
))
153 return (const struct bblock_t
*)block
->link
.prev
;
157 bblock_starts_with_control_flow(const struct bblock_t
*block
)
159 enum opcode op
= bblock_start_const(block
)->opcode
;
160 return op
== BRW_OPCODE_DO
|| op
== BRW_OPCODE_ENDIF
;
164 bblock_ends_with_control_flow(const struct bblock_t
*block
)
166 enum opcode op
= bblock_end_const(block
)->opcode
;
167 return op
== BRW_OPCODE_IF
||
168 op
== BRW_OPCODE_ELSE
||
169 op
== BRW_OPCODE_WHILE
||
170 op
== BRW_OPCODE_BREAK
||
171 op
== BRW_OPCODE_CONTINUE
;
174 static inline struct backend_instruction
*
175 bblock_first_non_control_flow_inst(struct bblock_t
*block
)
177 struct backend_instruction
*inst
= bblock_start(block
);
178 if (bblock_starts_with_control_flow(block
))
180 inst
= (struct backend_instruction
*)inst
->next
;
182 inst
= (struct backend_instruction
*)inst
->link
.next
;
187 static inline struct backend_instruction
*
188 bblock_last_non_control_flow_inst(struct bblock_t
*block
)
190 struct backend_instruction
*inst
= bblock_end(block
);
191 if (bblock_ends_with_control_flow(block
))
193 inst
= (struct backend_instruction
*)inst
->prev
;
195 inst
= (struct backend_instruction
*)inst
->link
.prev
;
201 inline backend_instruction
*
204 return bblock_start(this);
207 inline const backend_instruction
*
208 bblock_t::start() const
210 return bblock_start_const(this);
213 inline backend_instruction
*
216 return bblock_end(this);
219 inline const backend_instruction
*
220 bblock_t::end() const
222 return bblock_end_const(this);
228 return bblock_next(this);
231 inline const bblock_t
*
232 bblock_t::next() const
234 return bblock_next_const(this);
240 return bblock_prev(this);
243 inline const bblock_t
*
244 bblock_t::prev() const
246 return bblock_prev_const(this);
250 bblock_t::starts_with_control_flow() const
252 return bblock_starts_with_control_flow(this);
256 bblock_t::ends_with_control_flow() const
258 return bblock_ends_with_control_flow(this);
261 inline backend_instruction
*
262 bblock_t::first_non_control_flow_inst()
264 return bblock_first_non_control_flow_inst(this);
267 inline backend_instruction
*
268 bblock_t::last_non_control_flow_inst()
270 return bblock_last_non_control_flow_inst(this);
276 DECLARE_RALLOC_CXX_OPERATORS(cfg_t
)
278 cfg_t(exec_list
*instructions
);
281 void remove_block(bblock_t
*block
);
283 bblock_t
*new_block();
284 void set_next_block(bblock_t
**cur
, bblock_t
*block
, int ip
);
285 void make_block_array();
286 void calculate_idom();
287 static bblock_t
*intersect(bblock_t
*b1
, bblock_t
*b2
);
289 void dump(backend_shader
*s
);
295 /** Ordered list (by ip) of basic blocks */
296 struct exec_list block_list
;
297 struct bblock_t
**blocks
;
302 unsigned cycle_count
;
305 /* Note that this is implemented with a double for loop -- break will
306 * break from the inner loop only!
308 #define foreach_block_and_inst(__block, __type, __inst, __cfg) \
309 foreach_block (__block, __cfg) \
310 foreach_inst_in_block (__type, __inst, __block)
312 /* Note that this is implemented with a double for loop -- break will
313 * break from the inner loop only!
315 #define foreach_block_and_inst_safe(__block, __type, __inst, __cfg) \
316 foreach_block_safe (__block, __cfg) \
317 foreach_inst_in_block_safe (__type, __inst, __block)
319 #define foreach_block(__block, __cfg) \
320 foreach_list_typed (bblock_t, __block, link, &(__cfg)->block_list)
322 #define foreach_block_reverse(__block, __cfg) \
323 foreach_list_typed_reverse (bblock_t, __block, link, &(__cfg)->block_list)
325 #define foreach_block_safe(__block, __cfg) \
326 foreach_list_typed_safe (bblock_t, __block, link, &(__cfg)->block_list)
328 #define foreach_block_reverse_safe(__block, __cfg) \
329 foreach_list_typed_reverse_safe (bblock_t, __block, link, &(__cfg)->block_list)
331 #define foreach_inst_in_block(__type, __inst, __block) \
332 foreach_in_list(__type, __inst, &(__block)->instructions)
334 #define foreach_inst_in_block_safe(__type, __inst, __block) \
335 for (__type *__inst = (__type *)__block->instructions.head_sentinel.next, \
336 *__next = (__type *)__inst->next; \
339 __next = (__type *)__next->next)
341 #define foreach_inst_in_block_reverse(__type, __inst, __block) \
342 foreach_in_list_reverse(__type, __inst, &(__block)->instructions)
344 #define foreach_inst_in_block_reverse_safe(__type, __inst, __block) \
345 foreach_in_list_reverse_safe(__type, __inst, &(__block)->instructions)
347 #define foreach_inst_in_block_starting_from(__type, __scan_inst, __inst) \
348 for (__type *__scan_inst = (__type *)__inst->next; \
349 !__scan_inst->is_tail_sentinel(); \
350 __scan_inst = (__type *)__scan_inst->next)
352 #define foreach_inst_in_block_reverse_starting_from(__type, __scan_inst, __inst) \
353 for (__type *__scan_inst = (__type *)__inst->prev; \
354 !__scan_inst->is_head_sentinel(); \
355 __scan_inst = (__type *)__scan_inst->prev)
357 #endif /* BRW_CFG_H */