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annotate gcc/ipa-prop.h @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
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rev | line source |
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0 | 1 /* Interprocedural analyses. |
145 | 2 Copyright (C) 2005-2020 Free Software Foundation, Inc. |
0 | 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 IPA_PROP_H | |
21 #define IPA_PROP_H | |
22 | |
23 /* The following definitions and interfaces are used by | |
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24 interprocedural analyses or parameters. */ |
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25 |
111 | 26 #define IPA_UNDESCRIBED_USE -1 |
27 | |
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28 /* ipa-prop.c stuff (ipa-cp, indirect inlining): */ |
0 | 29 |
30 /* A jump function for a callsite represents the values passed as actual | |
111 | 31 arguments of the callsite. They were originally proposed in a paper called |
32 "Interprocedural Constant Propagation", by David Callahan, Keith D Cooper, | |
33 Ken Kennedy, Linda Torczon in Comp86, pg 152-161. There are three main | |
34 types of values : | |
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35 |
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36 Pass-through - the caller's formal parameter is passed as an actual |
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37 argument, possibly one simple operation performed on it. |
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38 Constant - a constant (is_gimple_ip_invariant)is passed as an actual |
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39 argument. |
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40 Unknown - neither of the above. |
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41 |
145 | 42 IPA_JF_LOAD_AGG is a compound pass-through jump function, in which primary |
43 operation on formal parameter is memory dereference that loads a value from | |
44 a part of an aggregate, which is represented or pointed to by the formal | |
45 parameter. Moreover, an additional unary/binary operation can be applied on | |
46 the loaded value, and final result is passed as actual argument of callee | |
47 (e.g. *(param_1(D) + 4) op 24 ). It is meant to describe usage of aggregate | |
48 parameter or by-reference parameter referenced in argument passing, commonly | |
49 found in C++ and Fortran. | |
50 | |
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51 IPA_JF_ANCESTOR is a special pass-through jump function, which means that |
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52 the result is an address of a part of the object pointed to by the formal |
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53 parameter to which the function refers. It is mainly intended to represent |
111 | 54 getting addresses of ancestor fields in C++ |
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55 (e.g. &this_1(D)->D.1766.D.1756). Note that if the original pointer is |
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56 NULL, ancestor jump function must behave like a simple pass-through. |
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57 |
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58 Other pass-through functions can either simply pass on an unchanged formal |
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59 parameter or can apply one simple binary operation to it (such jump |
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60 functions are called polynomial). |
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61 |
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62 Jump functions are computed in ipa-prop.c by function |
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63 update_call_notes_after_inlining. Some information can be lost and jump |
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64 functions degraded accordingly when inlining, see |
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65 update_call_notes_after_inlining in the same file. */ |
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66 |
0 | 67 enum jump_func_type |
68 { | |
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69 IPA_JF_UNKNOWN = 0, /* newly allocated and zeroed jump functions default */ |
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70 IPA_JF_CONST, /* represented by field costant */ |
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71 IPA_JF_PASS_THROUGH, /* represented by field pass_through */ |
145 | 72 IPA_JF_LOAD_AGG, /* represented by field load_agg */ |
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73 IPA_JF_ANCESTOR /* represented by field ancestor */ |
0 | 74 }; |
75 | |
111 | 76 struct ipa_cst_ref_desc; |
77 | |
78 /* Structure holding data required to describe a constant jump function. */ | |
79 struct GTY(()) ipa_constant_data | |
80 { | |
81 /* THe value of the constant. */ | |
82 tree value; | |
83 /* Pointer to the structure that describes the reference. */ | |
84 struct ipa_cst_ref_desc GTY((skip)) *rdesc; | |
85 }; | |
86 | |
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87 /* Structure holding data required to describe a pass-through jump function. */ |
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88 |
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89 struct GTY(()) ipa_pass_through_data |
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90 { |
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91 /* If an operation is to be performed on the original parameter, this is the |
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92 second (constant) operand. */ |
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93 tree operand; |
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94 /* Number of the caller's formal parameter being passed. */ |
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95 int formal_id; |
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96 /* Operation that is performed on the argument before it is passed on. |
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97 NOP_EXPR means no operation. Otherwise oper must be a simple binary |
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98 arithmetic operation where the caller's parameter is the first operand and |
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99 operand field from this structure is the second one. */ |
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100 enum tree_code operation; |
111 | 101 /* When the passed value is a pointer, it is set to true only when we are |
102 certain that no write to the object it points to has occurred since the | |
103 caller functions started execution, except for changes noted in the | |
104 aggregate part of the jump function (see description of | |
105 ipa_agg_jump_function). The flag is used only when the operation is | |
106 NOP_EXPR. */ | |
107 unsigned agg_preserved : 1; | |
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108 }; |
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109 |
145 | 110 /* Structure holding data required to describe a load-value-from-aggregate |
111 jump function. */ | |
112 | |
113 struct GTY(()) ipa_load_agg_data | |
114 { | |
115 /* Inherit from pass through jump function, describing unary/binary | |
116 operation on the value loaded from aggregate that is represented or | |
117 pointed to by the formal parameter, specified by formal_id in this | |
118 pass_through jump function data structure. */ | |
119 struct ipa_pass_through_data pass_through; | |
120 /* Type of the value loaded from the aggregate. */ | |
121 tree type; | |
122 /* Offset at which the value is located within the aggregate. */ | |
123 HOST_WIDE_INT offset; | |
124 /* True if loaded by reference (the aggregate is pointed to by the formal | |
125 parameter) or false if loaded by value (the aggregate is represented | |
126 by the formal parameter). */ | |
127 bool by_ref; | |
128 }; | |
129 | |
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130 /* Structure holding data required to describe an ancestor pass-through |
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131 jump function. */ |
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132 |
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133 struct GTY(()) ipa_ancestor_jf_data |
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134 { |
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135 /* Offset of the field representing the ancestor. */ |
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136 HOST_WIDE_INT offset; |
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137 /* Number of the caller's formal parameter being passed. */ |
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138 int formal_id; |
111 | 139 /* Flag with the same meaning like agg_preserve in ipa_pass_through_data. */ |
140 unsigned agg_preserved : 1; | |
141 }; | |
142 | |
145 | 143 /* A jump function for an aggregate part at a given offset, which describes how |
144 it content value is generated. All unlisted positions are assumed to have a | |
145 value defined in an unknown way. */ | |
146 | |
147 struct GTY(()) ipa_agg_jf_item | |
148 { | |
149 /* The offset for the aggregate part. */ | |
150 HOST_WIDE_INT offset; | |
151 | |
152 /* Data type of the aggregate part. */ | |
153 tree type; | |
154 | |
155 /* Jump function type. */ | |
156 enum jump_func_type jftype; | |
157 | |
158 /* Represents a value of jump function. constant represents the actual constant | |
159 in constant jump function content. pass_through is used only in simple pass | |
160 through jump function context. load_agg is for load-value-from-aggregate | |
161 jump function context. */ | |
162 union jump_func_agg_value | |
163 { | |
164 tree GTY ((tag ("IPA_JF_CONST"))) constant; | |
165 struct ipa_pass_through_data GTY ((tag ("IPA_JF_PASS_THROUGH"))) pass_through; | |
166 struct ipa_load_agg_data GTY ((tag ("IPA_JF_LOAD_AGG"))) load_agg; | |
167 } GTY ((desc ("%1.jftype"))) value; | |
168 }; | |
169 | |
170 /* Jump functions describing a set of aggregate contents. */ | |
171 | |
172 struct GTY(()) ipa_agg_jump_function | |
173 { | |
174 /* Description of the individual jump function item. */ | |
175 vec<ipa_agg_jf_item, va_gc> *items; | |
176 /* True if the data was passed by reference (as opposed to by value). */ | |
177 bool by_ref; | |
178 }; | |
179 | |
180 /* An element in an aggregate part describing a known value at a given offset. | |
181 All unlisted positions are assumed to be unknown and all listed values must | |
111 | 182 fulfill is_gimple_ip_invariant. */ |
183 | |
145 | 184 struct ipa_agg_value |
111 | 185 { |
186 /* The offset at which the known value is located within the aggregate. */ | |
187 HOST_WIDE_INT offset; | |
188 | |
145 | 189 /* The known constant. */ |
111 | 190 tree value; |
145 | 191 |
192 /* Return true if OTHER describes same agg value. */ | |
193 bool equal_to (const ipa_agg_value &other); | |
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194 }; |
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195 |
145 | 196 /* Structure describing a set of known offset/value for aggregate. */ |
111 | 197 |
145 | 198 struct ipa_agg_value_set |
199 { | |
200 /* Description of the individual item. */ | |
201 vec<ipa_agg_value> items; | |
202 /* True if the data was passed by reference (as opposed to by value). */ | |
203 bool by_ref; | |
111 | 204 |
145 | 205 /* Return true if OTHER describes same agg values. */ |
206 bool equal_to (const ipa_agg_value_set &other) | |
207 { | |
208 if (by_ref != other.by_ref) | |
209 return false; | |
210 if (items.length () != other.items.length ()) | |
211 return false; | |
212 for (unsigned int i = 0; i < items.length (); i++) | |
213 if (!items[i].equal_to (other.items[i])) | |
214 return false; | |
215 return true; | |
216 } | |
217 | |
218 /* Return true if there is any value for aggregate. */ | |
219 bool is_empty () const | |
220 { | |
221 return items.is_empty (); | |
222 } | |
223 | |
224 ipa_agg_value_set copy () const | |
225 { | |
226 ipa_agg_value_set new_copy; | |
227 | |
228 new_copy.items = items.copy (); | |
229 new_copy.by_ref = by_ref; | |
230 | |
231 return new_copy; | |
232 } | |
233 | |
234 void release () | |
235 { | |
236 items.release (); | |
237 } | |
111 | 238 }; |
239 | |
145 | 240 /* Return copy of a vec<ipa_agg_value_set>. */ |
241 | |
242 static inline vec<ipa_agg_value_set> | |
243 ipa_copy_agg_values (const vec<ipa_agg_value_set> &aggs) | |
244 { | |
245 vec<ipa_agg_value_set> aggs_copy = vNULL; | |
246 | |
247 if (!aggs.is_empty ()) | |
248 { | |
249 ipa_agg_value_set *agg; | |
250 int i; | |
251 | |
252 aggs_copy.reserve_exact (aggs.length ()); | |
253 | |
254 FOR_EACH_VEC_ELT (aggs, i, agg) | |
255 aggs_copy.quick_push (agg->copy ()); | |
256 } | |
257 | |
258 return aggs_copy; | |
259 } | |
260 | |
261 /* For vec<ipa_agg_value_set>, DO NOT call release(), use below function | |
262 instead. Because ipa_agg_value_set contains a field of vector type, we | |
263 should release this child vector in each element before reclaiming the | |
264 whole vector. */ | |
265 | |
266 static inline void | |
267 ipa_release_agg_values (vec<ipa_agg_value_set> &aggs, | |
268 bool release_vector = true) | |
269 { | |
270 ipa_agg_value_set *agg; | |
271 int i; | |
272 | |
273 FOR_EACH_VEC_ELT (aggs, i, agg) | |
274 agg->release (); | |
275 if (release_vector) | |
276 aggs.release (); | |
277 } | |
111 | 278 |
279 /* Information about zero/non-zero bits. */ | |
145 | 280 class GTY(()) ipa_bits |
0 | 281 { |
145 | 282 public: |
111 | 283 /* The propagated value. */ |
284 widest_int value; | |
285 /* Mask corresponding to the value. | |
286 Similar to ccp_lattice_t, if xth bit of mask is 0, | |
287 implies xth bit of value is constant. */ | |
288 widest_int mask; | |
289 }; | |
290 | |
291 /* Info about value ranges. */ | |
292 | |
145 | 293 class GTY(()) ipa_vr |
111 | 294 { |
145 | 295 public: |
111 | 296 /* The data fields below are valid only if known is true. */ |
297 bool known; | |
131 | 298 enum value_range_kind type; |
111 | 299 wide_int min; |
300 wide_int max; | |
145 | 301 bool nonzero_p (tree) const; |
0 | 302 }; |
303 | |
304 /* A jump function for a callsite represents the values passed as actual | |
305 arguments of the callsite. See enum jump_func_type for the various | |
306 types of jump functions supported. */ | |
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307 struct GTY (()) ipa_jump_func |
0 | 308 { |
145 | 309 /* Aggregate jump function description. See struct ipa_agg_jump_function |
310 and its description. */ | |
111 | 311 struct ipa_agg_jump_function agg; |
312 | |
313 /* Information about zero/non-zero bits. The pointed to structure is shared | |
314 betweed different jump functions. Use ipa_set_jfunc_bits to set this | |
315 field. */ | |
145 | 316 class ipa_bits *bits; |
111 | 317 |
318 /* Information about value range, containing valid data only when vr_known is | |
319 true. The pointed to structure is shared betweed different jump | |
320 functions. Use ipa_set_jfunc_vr to set this field. */ | |
145 | 321 class value_range *m_vr; |
111 | 322 |
0 | 323 enum jump_func_type type; |
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324 /* Represents a value of a jump function. pass_through is used only in jump |
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325 function context. constant represents the actual constant in constant jump |
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326 functions and member_cst holds constant c++ member functions. */ |
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327 union jump_func_value |
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328 { |
111 | 329 struct ipa_constant_data GTY ((tag ("IPA_JF_CONST"))) constant; |
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330 struct ipa_pass_through_data GTY ((tag ("IPA_JF_PASS_THROUGH"))) pass_through; |
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331 struct ipa_ancestor_jf_data GTY ((tag ("IPA_JF_ANCESTOR"))) ancestor; |
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332 } GTY ((desc ("%1.type"))) value; |
0 | 333 }; |
334 | |
111 | 335 |
336 /* Return the constant stored in a constant jump functin JFUNC. */ | |
337 | |
338 static inline tree | |
339 ipa_get_jf_constant (struct ipa_jump_func *jfunc) | |
340 { | |
341 gcc_checking_assert (jfunc->type == IPA_JF_CONST); | |
342 return jfunc->value.constant.value; | |
343 } | |
344 | |
345 static inline struct ipa_cst_ref_desc * | |
346 ipa_get_jf_constant_rdesc (struct ipa_jump_func *jfunc) | |
347 { | |
348 gcc_checking_assert (jfunc->type == IPA_JF_CONST); | |
349 return jfunc->value.constant.rdesc; | |
350 } | |
351 | |
352 /* Return the operand of a pass through jmp function JFUNC. */ | |
353 | |
354 static inline tree | |
355 ipa_get_jf_pass_through_operand (struct ipa_jump_func *jfunc) | |
356 { | |
357 gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
358 return jfunc->value.pass_through.operand; | |
359 } | |
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360 |
111 | 361 /* Return the number of the caller's formal parameter that a pass through jump |
362 function JFUNC refers to. */ | |
363 | |
364 static inline int | |
365 ipa_get_jf_pass_through_formal_id (struct ipa_jump_func *jfunc) | |
366 { | |
367 gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
368 return jfunc->value.pass_through.formal_id; | |
369 } | |
370 | |
371 /* Return operation of a pass through jump function JFUNC. */ | |
372 | |
373 static inline enum tree_code | |
374 ipa_get_jf_pass_through_operation (struct ipa_jump_func *jfunc) | |
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375 { |
111 | 376 gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); |
377 return jfunc->value.pass_through.operation; | |
378 } | |
379 | |
380 /* Return the agg_preserved flag of a pass through jump function JFUNC. */ | |
381 | |
382 static inline bool | |
383 ipa_get_jf_pass_through_agg_preserved (struct ipa_jump_func *jfunc) | |
384 { | |
385 gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
386 return jfunc->value.pass_through.agg_preserved; | |
387 } | |
388 | |
389 /* Return true if pass through jump function JFUNC preserves type | |
390 information. */ | |
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391 |
111 | 392 static inline bool |
393 ipa_get_jf_pass_through_type_preserved (struct ipa_jump_func *jfunc) | |
394 { | |
395 gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
396 return jfunc->value.pass_through.agg_preserved; | |
397 } | |
398 | |
399 /* Return the offset of an ancestor jump function JFUNC. */ | |
400 | |
401 static inline HOST_WIDE_INT | |
402 ipa_get_jf_ancestor_offset (struct ipa_jump_func *jfunc) | |
0 | 403 { |
111 | 404 gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); |
405 return jfunc->value.ancestor.offset; | |
406 } | |
407 | |
408 /* Return the number of the caller's formal parameter that an ancestor jump | |
409 function JFUNC refers to. */ | |
410 | |
411 static inline int | |
412 ipa_get_jf_ancestor_formal_id (struct ipa_jump_func *jfunc) | |
413 { | |
414 gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); | |
415 return jfunc->value.ancestor.formal_id; | |
416 } | |
417 | |
418 /* Return the agg_preserved flag of an ancestor jump function JFUNC. */ | |
0 | 419 |
111 | 420 static inline bool |
421 ipa_get_jf_ancestor_agg_preserved (struct ipa_jump_func *jfunc) | |
422 { | |
423 gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); | |
424 return jfunc->value.ancestor.agg_preserved; | |
425 } | |
426 | |
427 /* Return true if ancestor jump function JFUNC presrves type information. */ | |
428 | |
429 static inline bool | |
430 ipa_get_jf_ancestor_type_preserved (struct ipa_jump_func *jfunc) | |
0 | 431 { |
111 | 432 gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); |
433 return jfunc->value.ancestor.agg_preserved; | |
434 } | |
435 | |
436 /* Summary describing a single formal parameter. */ | |
437 | |
438 struct GTY(()) ipa_param_descriptor | |
439 { | |
440 /* In analysis and modification phase, this is the PARAM_DECL of this | |
441 parameter, in IPA LTO phase, this is the type of the the described | |
442 parameter or NULL if not known. Do not read this field directly but | |
443 through ipa_get_param and ipa_get_type as appropriate. */ | |
444 tree decl_or_type; | |
445 /* If all uses of the parameter are described by ipa-prop structures, this | |
446 says how many there are. If any use could not be described by means of | |
447 ipa-prop structures, this is IPA_UNDESCRIBED_USE. */ | |
448 int controlled_uses; | |
145 | 449 unsigned int move_cost : 28; |
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450 /* The parameter is used. */ |
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451 unsigned used : 1; |
145 | 452 unsigned used_by_ipa_predicates : 1; |
453 unsigned used_by_indirect_call : 1; | |
454 unsigned used_by_polymorphic_call : 1; | |
0 | 455 }; |
456 | |
457 /* ipa_node_params stores information related to formal parameters of functions | |
458 and some other information for interprocedural passes that operate on | |
459 parameters (such as ipa-cp). */ | |
111 | 460 |
145 | 461 class GTY((for_user)) ipa_node_params |
0 | 462 { |
145 | 463 public: |
111 | 464 /* Default constructor. */ |
465 ipa_node_params (); | |
466 | |
467 /* Default destructor. */ | |
468 ~ipa_node_params (); | |
469 | |
470 /* Information about individual formal parameters that are gathered when | |
471 summaries are generated. */ | |
472 vec<ipa_param_descriptor, va_gc> *descriptors; | |
0 | 473 /* Pointer to an array of structures describing individual formal |
474 parameters. */ | |
145 | 475 class ipcp_param_lattices * GTY((skip)) lattices; |
0 | 476 /* Only for versioned nodes this field would not be NULL, |
477 it points to the node that IPA cp cloned from. */ | |
111 | 478 struct cgraph_node * GTY((skip)) ipcp_orig_node; |
479 /* If this node is an ipa-cp clone, these are the known constants that | |
480 describe what it has been specialized for. */ | |
481 vec<tree> GTY((skip)) known_csts; | |
482 /* If this node is an ipa-cp clone, these are the known polymorphic contexts | |
483 that describe what it has been specialized for. */ | |
484 vec<ipa_polymorphic_call_context> GTY((skip)) known_contexts; | |
485 /* Whether the param uses analysis and jump function computation has already | |
486 been performed. */ | |
487 unsigned analysis_done : 1; | |
488 /* Whether the function is enqueued in ipa-cp propagation stack. */ | |
489 unsigned node_enqueued : 1; | |
490 /* Whether we should create a specialized version based on values that are | |
491 known to be constant in all contexts. */ | |
492 unsigned do_clone_for_all_contexts : 1; | |
493 /* Set if this is an IPA-CP clone for all contexts. */ | |
494 unsigned is_all_contexts_clone : 1; | |
495 /* Node has been completely replaced by clones and will be removed after | |
496 ipa-cp is finished. */ | |
497 unsigned node_dead : 1; | |
498 /* Node is involved in a recursion, potentionally indirect. */ | |
499 unsigned node_within_scc : 1; | |
145 | 500 /* Node contains only direct recursion. */ |
501 unsigned node_is_self_scc : 1; | |
111 | 502 /* Node is calling a private function called only once. */ |
503 unsigned node_calling_single_call : 1; | |
504 /* False when there is something makes versioning impossible. */ | |
505 unsigned versionable : 1; | |
506 }; | |
507 | |
508 inline | |
509 ipa_node_params::ipa_node_params () | |
510 : descriptors (NULL), lattices (NULL), ipcp_orig_node (NULL), | |
511 known_csts (vNULL), known_contexts (vNULL), analysis_done (0), | |
512 node_enqueued (0), do_clone_for_all_contexts (0), is_all_contexts_clone (0), | |
513 node_dead (0), node_within_scc (0), node_calling_single_call (0), | |
514 versionable (0) | |
515 { | |
516 } | |
517 | |
518 inline | |
519 ipa_node_params::~ipa_node_params () | |
520 { | |
521 free (lattices); | |
522 known_csts.release (); | |
523 known_contexts.release (); | |
524 } | |
525 | |
526 /* Intermediate information that we get from alias analysis about a particular | |
527 parameter in a particular basic_block. When a parameter or the memory it | |
528 references is marked modified, we use that information in all dominated | |
529 blocks without consulting alias analysis oracle. */ | |
530 | |
531 struct ipa_param_aa_status | |
532 { | |
533 /* Set when this structure contains meaningful information. If not, the | |
534 structure describing a dominating BB should be used instead. */ | |
535 bool valid; | |
536 | |
537 /* Whether we have seen something which might have modified the data in | |
538 question. PARM is for the parameter itself, REF is for data it points to | |
539 but using the alias type of individual accesses and PT is the same thing | |
540 but for computing aggregate pass-through functions using a very inclusive | |
541 ao_ref. */ | |
542 bool parm_modified, ref_modified, pt_modified; | |
543 }; | |
544 | |
545 /* Information related to a given BB that used only when looking at function | |
546 body. */ | |
547 | |
548 struct ipa_bb_info | |
549 { | |
550 /* Call graph edges going out of this BB. */ | |
551 vec<cgraph_edge *> cg_edges; | |
552 /* Alias analysis statuses of each formal parameter at this bb. */ | |
553 vec<ipa_param_aa_status> param_aa_statuses; | |
554 }; | |
555 | |
556 /* Structure with global information that is only used when looking at function | |
557 body. */ | |
558 | |
559 struct ipa_func_body_info | |
560 { | |
561 /* The node that is being analyzed. */ | |
562 cgraph_node *node; | |
563 | |
564 /* Its info. */ | |
145 | 565 class ipa_node_params *info; |
111 | 566 |
567 /* Information about individual BBs. */ | |
568 vec<ipa_bb_info> bb_infos; | |
569 | |
570 /* Number of parameters. */ | |
571 int param_count; | |
572 | |
145 | 573 /* Number of statements we are still allowed to walked by when analyzing this |
574 function. */ | |
575 unsigned int aa_walk_budget; | |
0 | 576 }; |
577 | |
578 /* ipa_node_params access functions. Please use these to access fields that | |
579 are or will be shared among various passes. */ | |
580 | |
581 /* Return the number of formal parameters. */ | |
582 | |
583 static inline int | |
145 | 584 ipa_get_param_count (class ipa_node_params *info) |
0 | 585 { |
111 | 586 return vec_safe_length (info->descriptors); |
0 | 587 } |
588 | |
589 /* Return the declaration of Ith formal parameter of the function corresponding | |
590 to INFO. Note there is no setter function as this array is built just once | |
111 | 591 using ipa_initialize_node_params. This function should not be called in |
592 WPA. */ | |
0 | 593 |
594 static inline tree | |
145 | 595 ipa_get_param (class ipa_node_params *info, int i) |
0 | 596 { |
111 | 597 gcc_checking_assert (info->descriptors); |
598 tree t = (*info->descriptors)[i].decl_or_type; | |
599 gcc_checking_assert (TREE_CODE (t) == PARM_DECL); | |
600 return t; | |
601 } | |
602 | |
603 /* Return the type of Ith formal parameter of the function corresponding | |
604 to INFO if it is known or NULL if not. */ | |
605 | |
606 static inline tree | |
145 | 607 ipa_get_type (class ipa_node_params *info, int i) |
111 | 608 { |
131 | 609 if (vec_safe_length (info->descriptors) <= (unsigned) i) |
610 return NULL; | |
111 | 611 tree t = (*info->descriptors)[i].decl_or_type; |
612 if (!t) | |
613 return NULL; | |
614 if (TYPE_P (t)) | |
615 return t; | |
616 gcc_checking_assert (TREE_CODE (t) == PARM_DECL); | |
617 return TREE_TYPE (t); | |
618 } | |
619 | |
620 /* Return the move cost of Ith formal parameter of the function corresponding | |
621 to INFO. */ | |
622 | |
623 static inline int | |
145 | 624 ipa_get_param_move_cost (class ipa_node_params *info, int i) |
111 | 625 { |
626 gcc_checking_assert (info->descriptors); | |
627 return (*info->descriptors)[i].move_cost; | |
0 | 628 } |
629 | |
111 | 630 /* Set the used flag corresponding to the Ith formal parameter of the function |
631 associated with INFO to VAL. */ | |
632 | |
633 static inline void | |
145 | 634 ipa_set_param_used (class ipa_node_params *info, int i, bool val) |
111 | 635 { |
636 gcc_checking_assert (info->descriptors); | |
637 (*info->descriptors)[i].used = val; | |
638 } | |
639 | |
145 | 640 /* Set the used_by_ipa_predicates flag corresponding to the Ith formal |
641 parameter of the function associated with INFO to VAL. */ | |
642 | |
643 static inline void | |
644 ipa_set_param_used_by_ipa_predicates (class ipa_node_params *info, int i, bool val) | |
645 { | |
646 gcc_checking_assert (info->descriptors); | |
647 (*info->descriptors)[i].used_by_ipa_predicates = val; | |
648 } | |
649 | |
650 /* Set the used_by_indirect_call flag corresponding to the Ith formal | |
651 parameter of the function associated with INFO to VAL. */ | |
652 | |
653 static inline void | |
654 ipa_set_param_used_by_indirect_call (class ipa_node_params *info, int i, bool val) | |
655 { | |
656 gcc_checking_assert (info->descriptors); | |
657 (*info->descriptors)[i].used_by_indirect_call = val; | |
658 } | |
659 | |
660 /* Set the .used_by_polymorphic_call flag corresponding to the Ith formal | |
661 parameter of the function associated with INFO to VAL. */ | |
662 | |
663 static inline void | |
664 ipa_set_param_used_by_polymorphic_call (class ipa_node_params *info, int i, bool val) | |
665 { | |
666 gcc_checking_assert (info->descriptors); | |
667 (*info->descriptors)[i].used_by_polymorphic_call = val; | |
668 } | |
669 | |
111 | 670 /* Return how many uses described by ipa-prop a parameter has or |
671 IPA_UNDESCRIBED_USE if there is a use that is not described by these | |
672 structures. */ | |
673 static inline int | |
145 | 674 ipa_get_controlled_uses (class ipa_node_params *info, int i) |
111 | 675 { |
676 /* FIXME: introducing speculation causes out of bounds access here. */ | |
677 if (vec_safe_length (info->descriptors) > (unsigned)i) | |
678 return (*info->descriptors)[i].controlled_uses; | |
679 return IPA_UNDESCRIBED_USE; | |
680 } | |
681 | |
682 /* Set the controlled counter of a given parameter. */ | |
683 | |
684 static inline void | |
145 | 685 ipa_set_controlled_uses (class ipa_node_params *info, int i, int val) |
111 | 686 { |
687 gcc_checking_assert (info->descriptors); | |
688 (*info->descriptors)[i].controlled_uses = val; | |
689 } | |
690 | |
691 /* Return the used flag corresponding to the Ith formal parameter of the | |
692 function associated with INFO. */ | |
0 | 693 |
694 static inline bool | |
145 | 695 ipa_is_param_used (class ipa_node_params *info, int i) |
0 | 696 { |
111 | 697 gcc_checking_assert (info->descriptors); |
698 return (*info->descriptors)[i].used; | |
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699 } |
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700 |
145 | 701 /* Return the used_by_ipa_predicates flag corresponding to the Ith formal |
702 parameter of the function associated with INFO. */ | |
703 | |
704 static inline bool | |
705 ipa_is_param_used_by_ipa_predicates (class ipa_node_params *info, int i) | |
706 { | |
707 gcc_checking_assert (info->descriptors); | |
708 return (*info->descriptors)[i].used_by_ipa_predicates; | |
709 } | |
710 | |
711 /* Return the used_by_indirect_call flag corresponding to the Ith formal | |
712 parameter of the function associated with INFO. */ | |
713 | |
714 static inline bool | |
715 ipa_is_param_used_by_indirect_call (class ipa_node_params *info, int i) | |
716 { | |
717 gcc_checking_assert (info->descriptors); | |
718 return (*info->descriptors)[i].used_by_indirect_call; | |
719 } | |
720 | |
721 /* Return the used_by_polymorphic_call flag corresponding to the Ith formal | |
722 parameter of the function associated with INFO. */ | |
723 | |
724 static inline bool | |
725 ipa_is_param_used_by_polymorphic_call (class ipa_node_params *info, int i) | |
726 { | |
727 gcc_checking_assert (info->descriptors); | |
728 return (*info->descriptors)[i].used_by_polymorphic_call; | |
729 } | |
730 | |
111 | 731 /* Information about replacements done in aggregates for a given node (each |
732 node has its linked list). */ | |
733 struct GTY(()) ipa_agg_replacement_value | |
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734 { |
111 | 735 /* Next item in the linked list. */ |
736 struct ipa_agg_replacement_value *next; | |
737 /* Offset within the aggregate. */ | |
738 HOST_WIDE_INT offset; | |
739 /* The constant value. */ | |
740 tree value; | |
741 /* The paramter index. */ | |
742 int index; | |
743 /* Whether the value was passed by reference. */ | |
744 bool by_ref; | |
745 }; | |
0 | 746 |
111 | 747 /* Structure holding information for the transformation phase of IPA-CP. */ |
0 | 748 |
131 | 749 struct GTY(()) ipcp_transformation |
0 | 750 { |
111 | 751 /* Linked list of known aggregate values. */ |
752 ipa_agg_replacement_value *agg_values; | |
753 /* Known bits information. */ | |
754 vec<ipa_bits *, va_gc> *bits; | |
755 /* Value range information. */ | |
756 vec<ipa_vr, va_gc> *m_vr; | |
145 | 757 |
758 /* Default constructor. */ | |
759 ipcp_transformation () | |
760 : agg_values (NULL), bits (NULL), m_vr (NULL) | |
761 { } | |
762 | |
763 /* Default destructor. */ | |
764 ~ipcp_transformation () | |
765 { | |
766 ipa_agg_replacement_value *agg = agg_values; | |
767 while (agg) | |
768 { | |
769 ipa_agg_replacement_value *next = agg->next; | |
770 ggc_free (agg); | |
771 agg = next; | |
772 } | |
773 vec_free (bits); | |
774 vec_free (m_vr); | |
775 } | |
111 | 776 }; |
0 | 777 |
111 | 778 void ipa_set_node_agg_value_chain (struct cgraph_node *node, |
779 struct ipa_agg_replacement_value *aggvals); | |
131 | 780 void ipcp_transformation_initialize (void); |
145 | 781 void ipcp_free_transformation_sum (void); |
0 | 782 |
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783 /* ipa_edge_args stores information related to a callsite and particularly its |
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784 arguments. It can be accessed by the IPA_EDGE_REF macro. */ |
111 | 785 |
786 class GTY((for_user)) ipa_edge_args | |
0 | 787 { |
111 | 788 public: |
789 | |
790 /* Default constructor. */ | |
791 ipa_edge_args () : jump_functions (NULL), polymorphic_call_contexts (NULL) | |
792 {} | |
793 | |
794 /* Destructor. */ | |
795 ~ipa_edge_args () | |
796 { | |
797 vec_free (jump_functions); | |
798 vec_free (polymorphic_call_contexts); | |
799 } | |
800 | |
801 /* Vectors of the callsite's jump function and polymorphic context | |
802 information of each parameter. */ | |
803 vec<ipa_jump_func, va_gc> *jump_functions; | |
804 vec<ipa_polymorphic_call_context, va_gc> *polymorphic_call_contexts; | |
805 }; | |
0 | 806 |
807 /* ipa_edge_args access functions. Please use these to access fields that | |
808 are or will be shared among various passes. */ | |
809 | |
810 /* Return the number of actual arguments. */ | |
811 | |
812 static inline int | |
145 | 813 ipa_get_cs_argument_count (class ipa_edge_args *args) |
0 | 814 { |
111 | 815 return vec_safe_length (args->jump_functions); |
0 | 816 } |
817 | |
818 /* Returns a pointer to the jump function for the ith argument. Please note | |
819 there is no setter function as jump functions are all set up in | |
820 ipa_compute_jump_functions. */ | |
821 | |
822 static inline struct ipa_jump_func * | |
145 | 823 ipa_get_ith_jump_func (class ipa_edge_args *args, int i) |
0 | 824 { |
111 | 825 return &(*args->jump_functions)[i]; |
826 } | |
827 | |
828 /* Returns a pointer to the polymorphic call context for the ith argument. | |
829 NULL if contexts are not computed. */ | |
145 | 830 static inline class ipa_polymorphic_call_context * |
831 ipa_get_ith_polymorhic_call_context (class ipa_edge_args *args, int i) | |
111 | 832 { |
833 if (!args->polymorphic_call_contexts) | |
834 return NULL; | |
835 return &(*args->polymorphic_call_contexts)[i]; | |
0 | 836 } |
837 | |
111 | 838 /* Function summary for ipa_node_params. */ |
839 class GTY((user)) ipa_node_params_t: public function_summary <ipa_node_params *> | |
840 { | |
841 public: | |
842 ipa_node_params_t (symbol_table *table, bool ggc): | |
843 function_summary<ipa_node_params *> (table, ggc) { } | |
844 | |
845 /* Hook that is called by summary when a node is duplicated. */ | |
846 virtual void duplicate (cgraph_node *node, | |
847 cgraph_node *node2, | |
848 ipa_node_params *data, | |
849 ipa_node_params *data2); | |
850 }; | |
851 | |
852 /* Summary to manange ipa_edge_args structures. */ | |
0 | 853 |
111 | 854 class GTY((user)) ipa_edge_args_sum_t : public call_summary <ipa_edge_args *> |
855 { | |
856 public: | |
857 ipa_edge_args_sum_t (symbol_table *table, bool ggc) | |
858 : call_summary<ipa_edge_args *> (table, ggc) { } | |
0 | 859 |
145 | 860 void remove (cgraph_edge *edge) |
861 { | |
862 call_summary <ipa_edge_args *>::remove (edge); | |
863 } | |
864 | |
865 /* Hook that is called by summary when an edge is removed. */ | |
111 | 866 virtual void remove (cgraph_edge *cs, ipa_edge_args *args); |
867 /* Hook that is called by summary when an edge is duplicated. */ | |
868 virtual void duplicate (cgraph_edge *src, | |
869 cgraph_edge *dst, | |
870 ipa_edge_args *old_args, | |
871 ipa_edge_args *new_args); | |
872 }; | |
873 | |
874 /* Function summary where the parameter infos are actually stored. */ | |
875 extern GTY(()) ipa_node_params_t * ipa_node_params_sum; | |
876 /* Call summary to store information about edges such as jump functions. */ | |
877 extern GTY(()) ipa_edge_args_sum_t *ipa_edge_args_sum; | |
878 | |
131 | 879 /* Function summary for IPA-CP transformation. */ |
880 class ipcp_transformation_t | |
881 : public function_summary<ipcp_transformation *> | |
882 { | |
883 public: | |
884 ipcp_transformation_t (symbol_table *table, bool ggc): | |
885 function_summary<ipcp_transformation *> (table, ggc) {} | |
886 | |
887 ~ipcp_transformation_t () {} | |
888 | |
889 static ipcp_transformation_t *create_ggc (symbol_table *symtab) | |
890 { | |
891 ipcp_transformation_t *summary | |
145 | 892 = new (ggc_alloc_no_dtor <ipcp_transformation_t> ()) |
131 | 893 ipcp_transformation_t (symtab, true); |
894 return summary; | |
895 } | |
145 | 896 /* Hook that is called by summary when a node is duplicated. */ |
897 virtual void duplicate (cgraph_node *node, | |
898 cgraph_node *node2, | |
899 ipcp_transformation *data, | |
900 ipcp_transformation *data2); | |
131 | 901 }; |
902 | |
903 /* Function summary where the IPA CP transformations are actually stored. */ | |
904 extern GTY(()) function_summary <ipcp_transformation *> *ipcp_transformation_sum; | |
0 | 905 |
906 /* Return the associated parameter/argument info corresponding to the given | |
907 node/edge. */ | |
145 | 908 #define IPA_NODE_REF(NODE) (ipa_node_params_sum->get (NODE)) |
909 #define IPA_NODE_REF_GET_CREATE(NODE) (ipa_node_params_sum->get_create (NODE)) | |
910 #define IPA_EDGE_REF(EDGE) (ipa_edge_args_sum->get (EDGE)) | |
911 #define IPA_EDGE_REF_GET_CREATE(EDGE) (ipa_edge_args_sum->get_create (EDGE)) | |
0 | 912 /* This macro checks validity of index returned by |
913 ipa_get_param_decl_index function. */ | |
914 #define IS_VALID_JUMP_FUNC_INDEX(I) ((I) != -1) | |
915 | |
916 /* Creating and freeing ipa_node_params and ipa_edge_args. */ | |
917 void ipa_create_all_node_params (void); | |
918 void ipa_create_all_edge_args (void); | |
111 | 919 void ipa_check_create_edge_args (void); |
0 | 920 void ipa_free_all_node_params (void); |
921 void ipa_free_all_edge_args (void); | |
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922 void ipa_free_all_structures_after_ipa_cp (void); |
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923 void ipa_free_all_structures_after_iinln (void); |
111 | 924 |
0 | 925 void ipa_register_cgraph_hooks (void); |
111 | 926 int count_formal_params (tree fndecl); |
0 | 927 |
928 /* This function ensures the array of node param infos is big enough to | |
929 accommodate a structure for all nodes and reallocates it if not. */ | |
930 | |
931 static inline void | |
932 ipa_check_create_node_params (void) | |
933 { | |
111 | 934 if (!ipa_node_params_sum) |
935 ipa_node_params_sum | |
145 | 936 = (new (ggc_alloc_no_dtor <ipa_node_params_t> ()) |
111 | 937 ipa_node_params_t (symtab, true)); |
0 | 938 } |
939 | |
111 | 940 /* Returns true if edge summary contains a record for EDGE. The main purpose |
941 of this function is that debug dumping function can check info availability | |
942 without causing allocations. */ | |
0 | 943 |
944 static inline bool | |
945 ipa_edge_args_info_available_for_edge_p (struct cgraph_edge *edge) | |
946 { | |
111 | 947 return ipa_edge_args_sum->exists (edge); |
0 | 948 } |
949 | |
131 | 950 static inline ipcp_transformation * |
111 | 951 ipcp_get_transformation_summary (cgraph_node *node) |
0 | 952 { |
131 | 953 if (ipcp_transformation_sum == NULL) |
111 | 954 return NULL; |
131 | 955 |
956 return ipcp_transformation_sum->get (node); | |
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957 } |
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958 |
111 | 959 /* Return the aggregate replacements for NODE, if there are any. */ |
960 | |
961 static inline struct ipa_agg_replacement_value * | |
962 ipa_get_agg_replacements_for_node (cgraph_node *node) | |
963 { | |
131 | 964 ipcp_transformation *ts = ipcp_get_transformation_summary (node); |
111 | 965 return ts ? ts->agg_values : NULL; |
966 } | |
0 | 967 |
968 /* Function formal parameters related computations. */ | |
969 void ipa_initialize_node_params (struct cgraph_node *node); | |
970 bool ipa_propagate_indirect_call_infos (struct cgraph_edge *cs, | |
111 | 971 vec<cgraph_edge *> *new_edges); |
0 | 972 |
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973 /* Indirect edge and binfo processing. */ |
111 | 974 tree ipa_get_indirect_edge_target (struct cgraph_edge *ie, |
145 | 975 vec<tree>, |
111 | 976 vec<ipa_polymorphic_call_context>, |
145 | 977 vec<ipa_agg_value_set>, |
111 | 978 bool *); |
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979 struct cgraph_edge *ipa_make_edge_direct_to_target (struct cgraph_edge *, tree, |
111 | 980 bool speculative = false); |
981 tree ipa_impossible_devirt_target (struct cgraph_edge *, tree); | |
982 ipa_bits *ipa_get_ipa_bits_for_value (const widest_int &value, | |
983 const widest_int &mask); | |
984 | |
985 | |
986 /* Functions related to both. */ | |
987 void ipa_analyze_node (struct cgraph_node *); | |
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988 |
111 | 989 /* Aggregate jump function related functions. */ |
145 | 990 tree ipa_find_agg_cst_for_param (struct ipa_agg_value_set *agg, tree scalar, |
111 | 991 HOST_WIDE_INT offset, bool by_ref, |
992 bool *from_global_constant = NULL); | |
993 bool ipa_load_from_parm_agg (struct ipa_func_body_info *fbi, | |
994 vec<ipa_param_descriptor, va_gc> *descriptors, | |
995 gimple *stmt, tree op, int *index_p, | |
145 | 996 HOST_WIDE_INT *offset_p, poly_int64 *size_p, |
111 | 997 bool *by_ref, bool *guaranteed_unmodified = NULL); |
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998 |
0 | 999 /* Debugging interface. */ |
1000 void ipa_print_node_params (FILE *, struct cgraph_node *node); | |
1001 void ipa_print_all_params (FILE *); | |
1002 void ipa_print_node_jump_functions (FILE *f, struct cgraph_node *node); | |
1003 void ipa_print_all_jump_functions (FILE * f); | |
111 | 1004 void ipcp_verify_propagated_values (void); |
1005 | |
1006 template <typename value> | |
1007 class ipcp_value; | |
1008 | |
1009 extern object_allocator<ipcp_value<tree> > ipcp_cst_values_pool; | |
1010 extern object_allocator<ipcp_value<ipa_polymorphic_call_context> > | |
1011 ipcp_poly_ctx_values_pool; | |
1012 | |
1013 template <typename valtype> | |
145 | 1014 struct ipcp_value_source; |
111 | 1015 |
1016 extern object_allocator<ipcp_value_source<tree> > ipcp_sources_pool; | |
1017 | |
145 | 1018 struct ipcp_agg_lattice; |
111 | 1019 |
1020 extern object_allocator<ipcp_agg_lattice> ipcp_agg_lattice_pool; | |
1021 | |
1022 void ipa_dump_agg_replacement_values (FILE *f, | |
1023 struct ipa_agg_replacement_value *av); | |
1024 void ipa_prop_write_jump_functions (void); | |
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1025 void ipa_prop_read_jump_functions (void); |
111 | 1026 void ipcp_write_transformation_summaries (void); |
1027 void ipcp_read_transformation_summaries (void); | |
145 | 1028 int ipa_get_param_decl_index (class ipa_node_params *, tree); |
1029 tree ipa_value_from_jfunc (class ipa_node_params *info, | |
131 | 1030 struct ipa_jump_func *jfunc, tree type); |
111 | 1031 unsigned int ipcp_transform_function (struct cgraph_node *node); |
1032 ipa_polymorphic_call_context ipa_context_from_jfunc (ipa_node_params *, | |
1033 cgraph_edge *, | |
1034 int, | |
1035 ipa_jump_func *); | |
145 | 1036 value_range ipa_value_range_from_jfunc (ipa_node_params *, cgraph_edge *, |
1037 ipa_jump_func *, tree); | |
1038 ipa_agg_value_set ipa_agg_value_set_from_jfunc (ipa_node_params *, | |
1039 cgraph_node *, | |
1040 ipa_agg_jump_function *); | |
1041 void ipa_dump_param (FILE *, class ipa_node_params *info, int i); | |
111 | 1042 void ipa_release_body_info (struct ipa_func_body_info *); |
1043 tree ipa_get_callee_param_type (struct cgraph_edge *e, int i); | |
145 | 1044 bool ipcp_get_parm_bits (tree, tree *, widest_int *); |
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1045 |
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1046 /* From tree-sra.c: */ |
131 | 1047 tree build_ref_for_offset (location_t, tree, poly_int64, bool, tree, |
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1048 gimple_stmt_iterator *, bool); |
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1049 |
111 | 1050 /* In ipa-cp.c */ |
1051 void ipa_cp_c_finalize (void); | |
1052 | |
0 | 1053 #endif /* IPA_PROP_H */ |