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518dc859 | 1 | /* Interprocedural constant propagation |
7adcbafe | 2 | Copyright (C) 2005-2022 Free Software Foundation, Inc. |
310bc633 MJ |
3 | |
4 | Contributed by Razya Ladelsky <RAZYA@il.ibm.com> and Martin Jambor | |
5 | <mjambor@suse.cz> | |
b8698a0f | 6 | |
518dc859 | 7 | This file is part of GCC. |
b8698a0f | 8 | |
518dc859 RL |
9 | GCC is free software; you can redistribute it and/or modify it under |
10 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 11 | Software Foundation; either version 3, or (at your option) any later |
518dc859 | 12 | version. |
b8698a0f | 13 | |
518dc859 RL |
14 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
15 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
16 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
17 | for more details. | |
b8698a0f | 18 | |
518dc859 | 19 | You should have received a copy of the GNU General Public License |
9dcd6f09 NC |
20 | along with GCC; see the file COPYING3. If not see |
21 | <http://www.gnu.org/licenses/>. */ | |
518dc859 | 22 | |
310bc633 | 23 | /* Interprocedural constant propagation (IPA-CP). |
b8698a0f | 24 | |
310bc633 | 25 | The goal of this transformation is to |
c43f07af | 26 | |
310bc633 MJ |
27 | 1) discover functions which are always invoked with some arguments with the |
28 | same known constant values and modify the functions so that the | |
29 | subsequent optimizations can take advantage of the knowledge, and | |
c43f07af | 30 | |
310bc633 MJ |
31 | 2) partial specialization - create specialized versions of functions |
32 | transformed in this way if some parameters are known constants only in | |
33 | certain contexts but the estimated tradeoff between speedup and cost size | |
34 | is deemed good. | |
b8698a0f | 35 | |
310bc633 MJ |
36 | The algorithm also propagates types and attempts to perform type based |
37 | devirtualization. Types are propagated much like constants. | |
b8698a0f | 38 | |
310bc633 MJ |
39 | The algorithm basically consists of three stages. In the first, functions |
40 | are analyzed one at a time and jump functions are constructed for all known | |
41 | call-sites. In the second phase, the pass propagates information from the | |
42 | jump functions across the call to reveal what values are available at what | |
43 | call sites, performs estimations of effects of known values on functions and | |
44 | their callees, and finally decides what specialized extra versions should be | |
45 | created. In the third, the special versions materialize and appropriate | |
46 | calls are redirected. | |
c43f07af | 47 | |
310bc633 MJ |
48 | The algorithm used is to a certain extent based on "Interprocedural Constant |
49 | Propagation", by David Callahan, Keith D Cooper, Ken Kennedy, Linda Torczon, | |
50 | Comp86, pg 152-161 and "A Methodology for Procedure Cloning" by Keith D | |
51 | Cooper, Mary W. Hall, and Ken Kennedy. | |
b8698a0f | 52 | |
518dc859 RL |
53 | |
54 | First stage - intraprocedural analysis | |
55 | ======================================= | |
310bc633 | 56 | |
c43f07af | 57 | This phase computes jump_function and modification flags. |
b8698a0f | 58 | |
310bc633 MJ |
59 | A jump function for a call-site represents the values passed as an actual |
60 | arguments of a given call-site. In principle, there are three types of | |
61 | values: | |
62 | ||
63 | Pass through - the caller's formal parameter is passed as an actual | |
155c9907 | 64 | argument, plus an operation on it can be performed. |
ea2c620c | 65 | Constant - a constant is passed as an actual argument. |
518dc859 | 66 | Unknown - neither of the above. |
b8698a0f | 67 | |
310bc633 MJ |
68 | All jump function types are described in detail in ipa-prop.h, together with |
69 | the data structures that represent them and methods of accessing them. | |
b8698a0f | 70 | |
310bc633 | 71 | ipcp_generate_summary() is the main function of the first stage. |
518dc859 RL |
72 | |
73 | Second stage - interprocedural analysis | |
74 | ======================================== | |
b8698a0f | 75 | |
310bc633 MJ |
76 | This stage is itself divided into two phases. In the first, we propagate |
77 | known values over the call graph, in the second, we make cloning decisions. | |
78 | It uses a different algorithm than the original Callahan's paper. | |
b8698a0f | 79 | |
310bc633 MJ |
80 | First, we traverse the functions topologically from callers to callees and, |
81 | for each strongly connected component (SCC), we propagate constants | |
82 | according to previously computed jump functions. We also record what known | |
83 | values depend on other known values and estimate local effects. Finally, we | |
073a8998 | 84 | propagate cumulative information about these effects from dependent values |
310bc633 | 85 | to those on which they depend. |
518dc859 | 86 | |
310bc633 MJ |
87 | Second, we again traverse the call graph in the same topological order and |
88 | make clones for functions which we know are called with the same values in | |
89 | all contexts and decide about extra specialized clones of functions just for | |
90 | some contexts - these decisions are based on both local estimates and | |
91 | cumulative estimates propagated from callees. | |
518dc859 | 92 | |
310bc633 MJ |
93 | ipcp_propagate_stage() and ipcp_decision_stage() together constitute the |
94 | third stage. | |
95 | ||
96 | Third phase - materialization of clones, call statement updates. | |
518dc859 | 97 | ============================================ |
310bc633 | 98 | |
e53b6e56 ML |
99 | This stage is currently performed by call graph code (mainly in cgraphunit.cc |
100 | and tree-inline.cc) according to instructions inserted to the call graph by | |
310bc633 | 101 | the second stage. */ |
518dc859 RL |
102 | |
103 | #include "config.h" | |
104 | #include "system.h" | |
105 | #include "coretypes.h" | |
957060b5 | 106 | #include "backend.h" |
518dc859 | 107 | #include "tree.h" |
2fb9a547 | 108 | #include "gimple-expr.h" |
13586172 | 109 | #include "gimple.h" |
9fdcd34e | 110 | #include "predict.h" |
c582198b | 111 | #include "alloc-pool.h" |
957060b5 AM |
112 | #include "tree-pass.h" |
113 | #include "cgraph.h" | |
114 | #include "diagnostic.h" | |
957060b5 AM |
115 | #include "fold-const.h" |
116 | #include "gimple-fold.h" | |
dd912cb8 | 117 | #include "symbol-summary.h" |
8bc5448f | 118 | #include "tree-vrp.h" |
518dc859 | 119 | #include "ipa-prop.h" |
cf835838 | 120 | #include "tree-pretty-print.h" |
3cc1cccc | 121 | #include "tree-inline.h" |
27d020cf | 122 | #include "ipa-fnsummary.h" |
310bc633 | 123 | #include "ipa-utils.h" |
209ca542 | 124 | #include "tree-ssa-ccp.h" |
314e6352 ML |
125 | #include "stringpool.h" |
126 | #include "attribs.h" | |
6c2583c1 | 127 | #include "dbgcnt.h" |
ae7a23a3 | 128 | #include "symtab-clones.h" |
518dc859 | 129 | |
c0cb5055 | 130 | template <typename valtype> class ipcp_value; |
ca30a539 | 131 | |
310bc633 | 132 | /* Describes a particular source for an IPA-CP value. */ |
ca30a539 | 133 | |
c0cb5055 | 134 | template <typename valtype> |
6c1dae73 | 135 | struct ipcp_value_source |
310bc633 | 136 | { |
c0cb5055 | 137 | public: |
2c9561b5 MJ |
138 | /* Aggregate offset of the source, negative if the source is scalar value of |
139 | the argument itself. */ | |
140 | HOST_WIDE_INT offset; | |
310bc633 | 141 | /* The incoming edge that brought the value. */ |
c0cb5055 | 142 | cgraph_edge *cs; |
310bc633 MJ |
143 | /* If the jump function that resulted into his value was a pass-through or an |
144 | ancestor, this is the ipcp_value of the caller from which the described | |
145 | value has been derived. Otherwise it is NULL. */ | |
c0cb5055 | 146 | ipcp_value<valtype> *val; |
310bc633 | 147 | /* Next pointer in a linked list of sources of a value. */ |
c0cb5055 | 148 | ipcp_value_source *next; |
310bc633 MJ |
149 | /* If the jump function that resulted into his value was a pass-through or an |
150 | ancestor, this is the index of the parameter of the caller the jump | |
151 | function references. */ | |
152 | int index; | |
153 | }; | |
ca30a539 | 154 | |
c0cb5055 MJ |
155 | /* Common ancestor for all ipcp_value instantiations. */ |
156 | ||
157 | class ipcp_value_base | |
158 | { | |
159 | public: | |
b86aedb0 MJ |
160 | /* Time benefit and that specializing the function for this value would bring |
161 | about in this function alone. */ | |
162 | sreal local_time_benefit; | |
163 | /* Time benefit that specializing the function for this value can bring about | |
164 | in it's callees. */ | |
165 | sreal prop_time_benefit; | |
166 | /* Size cost that specializing the function for this value would bring about | |
167 | in this function alone. */ | |
168 | int local_size_cost; | |
169 | /* Size cost that specializing the function for this value can bring about in | |
170 | it's callees. */ | |
171 | int prop_size_cost; | |
c8fb20d8 YG |
172 | |
173 | ipcp_value_base () | |
b86aedb0 MJ |
174 | : local_time_benefit (0), prop_time_benefit (0), |
175 | local_size_cost (0), prop_size_cost (0) {} | |
c0cb5055 MJ |
176 | }; |
177 | ||
310bc633 | 178 | /* Describes one particular value stored in struct ipcp_lattice. */ |
ca30a539 | 179 | |
c0cb5055 MJ |
180 | template <typename valtype> |
181 | class ipcp_value : public ipcp_value_base | |
518dc859 | 182 | { |
c0cb5055 MJ |
183 | public: |
184 | /* The actual value for the given parameter. */ | |
185 | valtype value; | |
310bc633 | 186 | /* The list of sources from which this value originates. */ |
ff2b92de | 187 | ipcp_value_source <valtype> *sources = nullptr; |
310bc633 | 188 | /* Next pointers in a linked list of all values in a lattice. */ |
ff2b92de | 189 | ipcp_value *next = nullptr; |
310bc633 MJ |
190 | /* Next pointers in a linked list of values in a strongly connected component |
191 | of values. */ | |
ff2b92de | 192 | ipcp_value *scc_next = nullptr; |
310bc633 MJ |
193 | /* Next pointers in a linked list of SCCs of values sorted topologically |
194 | according their sources. */ | |
ff2b92de | 195 | ipcp_value *topo_next = nullptr; |
310bc633 MJ |
196 | /* A specialized node created for this value, NULL if none has been (so far) |
197 | created. */ | |
ff2b92de | 198 | cgraph_node *spec_node = nullptr; |
310bc633 MJ |
199 | /* Depth first search number and low link for topological sorting of |
200 | values. */ | |
ff2b92de MJ |
201 | int dfs = 0; |
202 | int low_link = 0; | |
203 | /* SCC number to identify values which recursively feed into each other. | |
204 | Values in the same SCC have the same SCC number. */ | |
205 | int scc_no = 0; | |
206 | /* Non zero if the value is generated from another value in the same lattice | |
207 | for a self-recursive call, the actual number is how many times the | |
208 | operation has been performed. In the unlikely event of the value being | |
209 | present in two chains fo self-recursive value generation chains, it is the | |
210 | maximum. */ | |
211 | unsigned self_recursion_generated_level = 0; | |
f25ae20e | 212 | /* True if this value is currently on the topo-sort stack. */ |
ff2b92de | 213 | bool on_stack = false; |
c8fb20d8 | 214 | |
c0cb5055 MJ |
215 | void add_source (cgraph_edge *cs, ipcp_value *src_val, int src_idx, |
216 | HOST_WIDE_INT offset); | |
ff2b92de MJ |
217 | |
218 | /* Return true if both THIS value and O feed into each other. */ | |
219 | ||
220 | bool same_scc (const ipcp_value<valtype> *o) | |
221 | { | |
222 | return o->scc_no == scc_no; | |
223 | } | |
224 | ||
225 | /* Return true, if a this value has been generated for a self-recursive call as | |
226 | a result of an arithmetic pass-through jump-function acting on a value in | |
227 | the same lattice function. */ | |
228 | ||
229 | bool self_recursion_generated_p () | |
230 | { | |
231 | return self_recursion_generated_level > 0; | |
232 | } | |
310bc633 | 233 | }; |
518dc859 | 234 | |
2c9561b5 | 235 | /* Lattice describing potential values of a formal parameter of a function, or |
5764ee3c | 236 | a part of an aggregate. TOP is represented by a lattice with zero values |
2c9561b5 MJ |
237 | and with contains_variable and bottom flags cleared. BOTTOM is represented |
238 | by a lattice with the bottom flag set. In that case, values and | |
310bc633 MJ |
239 | contains_variable flag should be disregarded. */ |
240 | ||
c0cb5055 | 241 | template <typename valtype> |
6c1dae73 | 242 | struct ipcp_lattice |
518dc859 | 243 | { |
c0cb5055 | 244 | public: |
310bc633 MJ |
245 | /* The list of known values and types in this lattice. Note that values are |
246 | not deallocated if a lattice is set to bottom because there may be value | |
247 | sources referencing them. */ | |
c0cb5055 | 248 | ipcp_value<valtype> *values; |
310bc633 MJ |
249 | /* Number of known values and types in this lattice. */ |
250 | int values_count; | |
2c9561b5 | 251 | /* The lattice contains a variable component (in addition to values). */ |
310bc633 MJ |
252 | bool contains_variable; |
253 | /* The value of the lattice is bottom (i.e. variable and unusable for any | |
254 | propagation). */ | |
255 | bool bottom; | |
c0cb5055 MJ |
256 | |
257 | inline bool is_single_const (); | |
258 | inline bool set_to_bottom (); | |
259 | inline bool set_contains_variable (); | |
260 | bool add_value (valtype newval, cgraph_edge *cs, | |
261 | ipcp_value<valtype> *src_val = NULL, | |
9b14fc33 FX |
262 | int src_idx = 0, HOST_WIDE_INT offset = -1, |
263 | ipcp_value<valtype> **val_p = NULL, | |
ff2b92de | 264 | unsigned same_lat_gen_level = 0); |
c0cb5055 | 265 | void print (FILE * f, bool dump_sources, bool dump_benefits); |
2c9561b5 MJ |
266 | }; |
267 | ||
c0cb5055 MJ |
268 | /* Lattice of tree values with an offset to describe a part of an |
269 | aggregate. */ | |
2c9561b5 | 270 | |
6c1dae73 | 271 | struct ipcp_agg_lattice : public ipcp_lattice<tree> |
2c9561b5 | 272 | { |
c0cb5055 | 273 | public: |
2c9561b5 MJ |
274 | /* Offset that is being described by this lattice. */ |
275 | HOST_WIDE_INT offset; | |
276 | /* Size so that we don't have to re-compute it every time we traverse the | |
277 | list. Must correspond to TYPE_SIZE of all lat values. */ | |
278 | HOST_WIDE_INT size; | |
279 | /* Next element of the linked list. */ | |
280 | struct ipcp_agg_lattice *next; | |
281 | }; | |
282 | ||
209ca542 PK |
283 | /* Lattice of known bits, only capable of holding one value. |
284 | Bitwise constant propagation propagates which bits of a | |
285 | value are constant. | |
286 | For eg: | |
287 | int f(int x) | |
288 | { | |
289 | return some_op (x); | |
290 | } | |
291 | ||
292 | int f1(int y) | |
293 | { | |
294 | if (cond) | |
295 | return f (y & 0xff); | |
296 | else | |
297 | return f (y & 0xf); | |
298 | } | |
299 | ||
300 | In the above case, the param 'x' will always have all | |
301 | the bits (except the bits in lsb) set to 0. | |
302 | Hence the mask of 'x' would be 0xff. The mask | |
303 | reflects that the bits in lsb are unknown. | |
304 | The actual propagated value is given by m_value & ~m_mask. */ | |
305 | ||
306 | class ipcp_bits_lattice | |
307 | { | |
308 | public: | |
309 | bool bottom_p () { return m_lattice_val == IPA_BITS_VARYING; } | |
310 | bool top_p () { return m_lattice_val == IPA_BITS_UNDEFINED; } | |
311 | bool constant_p () { return m_lattice_val == IPA_BITS_CONSTANT; } | |
312 | bool set_to_bottom (); | |
155c9907 JJ |
313 | bool set_to_constant (widest_int, widest_int); |
314 | ||
209ca542 PK |
315 | widest_int get_value () { return m_value; } |
316 | widest_int get_mask () { return m_mask; } | |
317 | ||
318 | bool meet_with (ipcp_bits_lattice& other, unsigned, signop, | |
319 | enum tree_code, tree); | |
320 | ||
321 | bool meet_with (widest_int, widest_int, unsigned); | |
322 | ||
323 | void print (FILE *); | |
324 | ||
325 | private: | |
326 | enum { IPA_BITS_UNDEFINED, IPA_BITS_CONSTANT, IPA_BITS_VARYING } m_lattice_val; | |
327 | ||
328 | /* Similar to ccp_lattice_t, mask represents which bits of value are constant. | |
329 | If a bit in mask is set to 0, then the corresponding bit in | |
330 | value is known to be constant. */ | |
331 | widest_int m_value, m_mask; | |
332 | ||
155c9907 | 333 | bool meet_with_1 (widest_int, widest_int, unsigned); |
209ca542 | 334 | void get_value_and_mask (tree, widest_int *, widest_int *); |
155c9907 | 335 | }; |
209ca542 | 336 | |
8bc5448f KV |
337 | /* Lattice of value ranges. */ |
338 | ||
339 | class ipcp_vr_lattice | |
340 | { | |
341 | public: | |
028d81b1 | 342 | value_range m_vr; |
8bc5448f KV |
343 | |
344 | inline bool bottom_p () const; | |
345 | inline bool top_p () const; | |
346 | inline bool set_to_bottom (); | |
028d81b1 | 347 | bool meet_with (const value_range *p_vr); |
8bc5448f | 348 | bool meet_with (const ipcp_vr_lattice &other); |
54994253 | 349 | void init () { gcc_assert (m_vr.undefined_p ()); } |
8bc5448f KV |
350 | void print (FILE * f); |
351 | ||
352 | private: | |
028d81b1 | 353 | bool meet_with_1 (const value_range *other_vr); |
8bc5448f KV |
354 | }; |
355 | ||
2c9561b5 MJ |
356 | /* Structure containing lattices for a parameter itself and for pieces of |
357 | aggregates that are passed in the parameter or by a reference in a parameter | |
358 | plus some other useful flags. */ | |
359 | ||
c0cb5055 | 360 | class ipcp_param_lattices |
2c9561b5 | 361 | { |
c0cb5055 | 362 | public: |
2c9561b5 | 363 | /* Lattice describing the value of the parameter itself. */ |
c0cb5055 | 364 | ipcp_lattice<tree> itself; |
026c3cfd | 365 | /* Lattice describing the polymorphic contexts of a parameter. */ |
44210a96 | 366 | ipcp_lattice<ipa_polymorphic_call_context> ctxlat; |
2c9561b5 | 367 | /* Lattices describing aggregate parts. */ |
c0cb5055 | 368 | ipcp_agg_lattice *aggs; |
209ca542 PK |
369 | /* Lattice describing known bits. */ |
370 | ipcp_bits_lattice bits_lattice; | |
8bc5448f KV |
371 | /* Lattice describing value range. */ |
372 | ipcp_vr_lattice m_value_range; | |
2c9561b5 MJ |
373 | /* Number of aggregate lattices */ |
374 | int aggs_count; | |
375 | /* True if aggregate data were passed by reference (as opposed to by | |
376 | value). */ | |
377 | bool aggs_by_ref; | |
378 | /* All aggregate lattices contain a variable component (in addition to | |
379 | values). */ | |
380 | bool aggs_contain_variable; | |
381 | /* The value of all aggregate lattices is bottom (i.e. variable and unusable | |
382 | for any propagation). */ | |
383 | bool aggs_bottom; | |
384 | ||
310bc633 MJ |
385 | /* There is a virtual call based on this parameter. */ |
386 | bool virt_call; | |
387 | }; | |
518dc859 | 388 | |
2c9561b5 MJ |
389 | /* Allocation pools for values and their sources in ipa-cp. */ |
390 | ||
fb0b2914 | 391 | object_allocator<ipcp_value<tree> > ipcp_cst_values_pool |
fcb87c50 | 392 | ("IPA-CP constant values"); |
2651e637 | 393 | |
fb0b2914 | 394 | object_allocator<ipcp_value<ipa_polymorphic_call_context> > |
fcb87c50 | 395 | ipcp_poly_ctx_values_pool ("IPA-CP polymorphic contexts"); |
2651e637 | 396 | |
fb0b2914 | 397 | object_allocator<ipcp_value_source<tree> > ipcp_sources_pool |
fcb87c50 | 398 | ("IPA-CP value sources"); |
2651e637 | 399 | |
fb0b2914 | 400 | object_allocator<ipcp_agg_lattice> ipcp_agg_lattice_pool |
fcb87c50 | 401 | ("IPA_CP aggregate lattices"); |
2c9561b5 | 402 | |
ab100825 | 403 | /* Base count to use in heuristics when using profile feedback. */ |
310bc633 | 404 | |
ab100825 | 405 | static profile_count base_count; |
310bc633 MJ |
406 | |
407 | /* Original overall size of the program. */ | |
408 | ||
f7725a48 | 409 | static long overall_size, orig_overall_size; |
310bc633 | 410 | |
9e0b0ec3 MP |
411 | /* Node name to unique clone suffix number map. */ |
412 | static hash_map<const char *, unsigned> *clone_num_suffixes; | |
53aedcce | 413 | |
2c9561b5 MJ |
414 | /* Return the param lattices structure corresponding to the Ith formal |
415 | parameter of the function described by INFO. */ | |
99b1c316 MS |
416 | static inline class ipcp_param_lattices * |
417 | ipa_get_parm_lattices (class ipa_node_params *info, int i) | |
518dc859 | 418 | { |
d7da5cc8 | 419 | gcc_assert (i >= 0 && i < ipa_get_param_count (info)); |
310bc633 MJ |
420 | gcc_checking_assert (!info->ipcp_orig_node); |
421 | gcc_checking_assert (info->lattices); | |
422 | return &(info->lattices[i]); | |
518dc859 RL |
423 | } |
424 | ||
2c9561b5 MJ |
425 | /* Return the lattice corresponding to the scalar value of the Ith formal |
426 | parameter of the function described by INFO. */ | |
c0cb5055 | 427 | static inline ipcp_lattice<tree> * |
99b1c316 | 428 | ipa_get_scalar_lat (class ipa_node_params *info, int i) |
2c9561b5 | 429 | { |
99b1c316 | 430 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
2c9561b5 MJ |
431 | return &plats->itself; |
432 | } | |
433 | ||
44210a96 MJ |
434 | /* Return the lattice corresponding to the scalar value of the Ith formal |
435 | parameter of the function described by INFO. */ | |
436 | static inline ipcp_lattice<ipa_polymorphic_call_context> * | |
99b1c316 | 437 | ipa_get_poly_ctx_lat (class ipa_node_params *info, int i) |
44210a96 | 438 | { |
99b1c316 | 439 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
44210a96 MJ |
440 | return &plats->ctxlat; |
441 | } | |
442 | ||
310bc633 MJ |
443 | /* Return whether LAT is a lattice with a single constant and without an |
444 | undefined value. */ | |
445 | ||
c0cb5055 MJ |
446 | template <typename valtype> |
447 | inline bool | |
448 | ipcp_lattice<valtype>::is_single_const () | |
518dc859 | 449 | { |
c0cb5055 | 450 | if (bottom || contains_variable || values_count != 1) |
518dc859 | 451 | return false; |
310bc633 MJ |
452 | else |
453 | return true; | |
518dc859 RL |
454 | } |
455 | ||
310bc633 MJ |
456 | /* Print V which is extracted from a value in a lattice to F. */ |
457 | ||
518dc859 | 458 | static void |
310bc633 | 459 | print_ipcp_constant_value (FILE * f, tree v) |
518dc859 | 460 | { |
3b97a5c7 | 461 | if (TREE_CODE (v) == ADDR_EXPR |
155c9907 | 462 | && TREE_CODE (TREE_OPERAND (v, 0)) == CONST_DECL) |
518dc859 | 463 | { |
310bc633 | 464 | fprintf (f, "& "); |
ef6cb4c7 | 465 | print_generic_expr (f, DECL_INITIAL (TREE_OPERAND (v, 0))); |
518dc859 | 466 | } |
310bc633 | 467 | else |
ef6cb4c7 | 468 | print_generic_expr (f, v); |
518dc859 RL |
469 | } |
470 | ||
44210a96 MJ |
471 | /* Print V which is extracted from a value in a lattice to F. */ |
472 | ||
473 | static void | |
474 | print_ipcp_constant_value (FILE * f, ipa_polymorphic_call_context v) | |
475 | { | |
476 | v.dump(f, false); | |
477 | } | |
478 | ||
2c9561b5 MJ |
479 | /* Print a lattice LAT to F. */ |
480 | ||
c0cb5055 MJ |
481 | template <typename valtype> |
482 | void | |
483 | ipcp_lattice<valtype>::print (FILE * f, bool dump_sources, bool dump_benefits) | |
2c9561b5 | 484 | { |
c0cb5055 | 485 | ipcp_value<valtype> *val; |
2c9561b5 MJ |
486 | bool prev = false; |
487 | ||
c0cb5055 | 488 | if (bottom) |
2c9561b5 MJ |
489 | { |
490 | fprintf (f, "BOTTOM\n"); | |
491 | return; | |
492 | } | |
493 | ||
c0cb5055 | 494 | if (!values_count && !contains_variable) |
2c9561b5 MJ |
495 | { |
496 | fprintf (f, "TOP\n"); | |
497 | return; | |
498 | } | |
499 | ||
c0cb5055 | 500 | if (contains_variable) |
2c9561b5 MJ |
501 | { |
502 | fprintf (f, "VARIABLE"); | |
503 | prev = true; | |
504 | if (dump_benefits) | |
505 | fprintf (f, "\n"); | |
506 | } | |
507 | ||
c0cb5055 | 508 | for (val = values; val; val = val->next) |
2c9561b5 MJ |
509 | { |
510 | if (dump_benefits && prev) | |
511 | fprintf (f, " "); | |
512 | else if (!dump_benefits && prev) | |
513 | fprintf (f, ", "); | |
514 | else | |
515 | prev = true; | |
516 | ||
517 | print_ipcp_constant_value (f, val->value); | |
518 | ||
519 | if (dump_sources) | |
520 | { | |
c0cb5055 | 521 | ipcp_value_source<valtype> *s; |
2c9561b5 | 522 | |
ff2b92de MJ |
523 | if (val->self_recursion_generated_p ()) |
524 | fprintf (f, " [self_gen(%i), from:", | |
525 | val->self_recursion_generated_level); | |
526 | else | |
527 | fprintf (f, " [scc: %i, from:", val->scc_no); | |
2c9561b5 | 528 | for (s = val->sources; s; s = s->next) |
e3951b03 JH |
529 | fprintf (f, " %i(%f)", s->cs->caller->order, |
530 | s->cs->sreal_frequency ().to_double ()); | |
2c9561b5 MJ |
531 | fprintf (f, "]"); |
532 | } | |
533 | ||
534 | if (dump_benefits) | |
b86aedb0 MJ |
535 | fprintf (f, " [loc_time: %g, loc_size: %i, " |
536 | "prop_time: %g, prop_size: %i]\n", | |
537 | val->local_time_benefit.to_double (), val->local_size_cost, | |
538 | val->prop_time_benefit.to_double (), val->prop_size_cost); | |
2c9561b5 MJ |
539 | } |
540 | if (!dump_benefits) | |
541 | fprintf (f, "\n"); | |
542 | } | |
543 | ||
209ca542 PK |
544 | void |
545 | ipcp_bits_lattice::print (FILE *f) | |
546 | { | |
547 | if (top_p ()) | |
548 | fprintf (f, " Bits unknown (TOP)\n"); | |
549 | else if (bottom_p ()) | |
550 | fprintf (f, " Bits unusable (BOTTOM)\n"); | |
551 | else | |
552 | { | |
553 | fprintf (f, " Bits: value = "); print_hex (get_value (), f); | |
554 | fprintf (f, ", mask = "); print_hex (get_mask (), f); | |
555 | fprintf (f, "\n"); | |
556 | } | |
557 | } | |
558 | ||
8bc5448f KV |
559 | /* Print value range lattice to F. */ |
560 | ||
561 | void | |
562 | ipcp_vr_lattice::print (FILE * f) | |
563 | { | |
c49eeac3 | 564 | dump_value_range (f, &m_vr); |
8bc5448f KV |
565 | } |
566 | ||
c43f07af | 567 | /* Print all ipcp_lattices of all functions to F. */ |
310bc633 | 568 | |
518dc859 | 569 | static void |
310bc633 | 570 | print_all_lattices (FILE * f, bool dump_sources, bool dump_benefits) |
518dc859 RL |
571 | { |
572 | struct cgraph_node *node; | |
573 | int i, count; | |
3cc1cccc | 574 | |
310bc633 MJ |
575 | fprintf (f, "\nLattices:\n"); |
576 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) | |
518dc859 | 577 | { |
99b1c316 | 578 | class ipa_node_params *info; |
0eae6bab | 579 | |
a4a3cdd0 | 580 | info = ipa_node_params_sum->get (node); |
48182bd6 MJ |
581 | /* Skip unoptimized functions and constprop clones since we don't make |
582 | lattices for them. */ | |
583 | if (!info || info->ipcp_orig_node) | |
9ee46552 | 584 | continue; |
464d0118 | 585 | fprintf (f, " Node: %s:\n", node->dump_name ()); |
c43f07af | 586 | count = ipa_get_param_count (info); |
518dc859 RL |
587 | for (i = 0; i < count; i++) |
588 | { | |
2c9561b5 | 589 | struct ipcp_agg_lattice *aglat; |
99b1c316 | 590 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
ca30a539 | 591 | fprintf (f, " param [%d]: ", i); |
c0cb5055 | 592 | plats->itself.print (f, dump_sources, dump_benefits); |
44210a96 MJ |
593 | fprintf (f, " ctxs: "); |
594 | plats->ctxlat.print (f, dump_sources, dump_benefits); | |
209ca542 | 595 | plats->bits_lattice.print (f); |
8bc5448f KV |
596 | fprintf (f, " "); |
597 | plats->m_value_range.print (f); | |
598 | fprintf (f, "\n"); | |
2c9561b5 MJ |
599 | if (plats->virt_call) |
600 | fprintf (f, " virt_call flag set\n"); | |
601 | ||
602 | if (plats->aggs_bottom) | |
310bc633 | 603 | { |
2c9561b5 | 604 | fprintf (f, " AGGS BOTTOM\n"); |
310bc633 MJ |
605 | continue; |
606 | } | |
2c9561b5 MJ |
607 | if (plats->aggs_contain_variable) |
608 | fprintf (f, " AGGS VARIABLE\n"); | |
609 | for (aglat = plats->aggs; aglat; aglat = aglat->next) | |
310bc633 | 610 | { |
2c9561b5 MJ |
611 | fprintf (f, " %soffset " HOST_WIDE_INT_PRINT_DEC ": ", |
612 | plats->aggs_by_ref ? "ref " : "", aglat->offset); | |
c0cb5055 | 613 | aglat->print (f, dump_sources, dump_benefits); |
310bc633 | 614 | } |
518dc859 RL |
615 | } |
616 | } | |
617 | } | |
618 | ||
310bc633 MJ |
619 | /* Determine whether it is at all technically possible to create clones of NODE |
620 | and store this information in the ipa_node_params structure associated | |
621 | with NODE. */ | |
27dbd3ac | 622 | |
310bc633 | 623 | static void |
7e729474 | 624 | determine_versionability (struct cgraph_node *node, |
99b1c316 | 625 | class ipa_node_params *info) |
27dbd3ac | 626 | { |
310bc633 | 627 | const char *reason = NULL; |
0818c24c | 628 | |
aa229804 MJ |
629 | /* There are a number of generic reasons functions cannot be versioned. We |
630 | also cannot remove parameters if there are type attributes such as fnspec | |
631 | present. */ | |
67f3791f | 632 | if (node->alias || node->thunk) |
310bc633 | 633 | reason = "alias or thunk"; |
87f94429 | 634 | else if (!node->versionable) |
d7da5cc8 | 635 | reason = "not a tree_versionable_function"; |
d52f5295 | 636 | else if (node->get_availability () <= AVAIL_INTERPOSABLE) |
310bc633 | 637 | reason = "insufficient body availability"; |
d31d42c7 JJ |
638 | else if (!opt_for_fn (node->decl, optimize) |
639 | || !opt_for_fn (node->decl, flag_ipa_cp)) | |
640 | reason = "non-optimized function"; | |
0136f8f0 AH |
641 | else if (lookup_attribute ("omp declare simd", DECL_ATTRIBUTES (node->decl))) |
642 | { | |
643 | /* Ideally we should clone the SIMD clones themselves and create | |
644 | vector copies of them, so IPA-cp and SIMD clones can happily | |
645 | coexist, but that may not be worth the effort. */ | |
646 | reason = "function has SIMD clones"; | |
647 | } | |
58b3986e ES |
648 | else if (lookup_attribute ("target_clones", DECL_ATTRIBUTES (node->decl))) |
649 | { | |
650 | /* Ideally we should clone the target clones themselves and create | |
651 | copies of them, so IPA-cp and target clones can happily | |
652 | coexist, but that may not be worth the effort. */ | |
653 | reason = "function target_clones attribute"; | |
654 | } | |
1f26ac87 JM |
655 | /* Don't clone decls local to a comdat group; it breaks and for C++ |
656 | decloned constructors, inlining is always better anyway. */ | |
d52f5295 | 657 | else if (node->comdat_local_p ()) |
1f26ac87 | 658 | reason = "comdat-local function"; |
58928b35 ML |
659 | else if (node->calls_comdat_local) |
660 | { | |
661 | /* TODO: call is versionable if we make sure that all | |
662 | callers are inside of a comdat group. */ | |
663 | reason = "calls comdat-local function"; | |
664 | } | |
27dbd3ac | 665 | |
ea49d40b | 666 | /* Functions calling BUILT_IN_VA_ARG_PACK and BUILT_IN_VA_ARG_PACK_LEN |
5d4991da JH |
667 | work only when inlined. Cloning them may still lead to better code |
668 | because ipa-cp will not give up on cloning further. If the function is | |
669 | external this however leads to wrong code because we may end up producing | |
ea49d40b JH |
670 | offline copy of the function. */ |
671 | if (DECL_EXTERNAL (node->decl)) | |
672 | for (cgraph_edge *edge = node->callees; !reason && edge; | |
673 | edge = edge->next_callee) | |
3d78e008 | 674 | if (fndecl_built_in_p (edge->callee->decl, BUILT_IN_NORMAL)) |
ea49d40b JH |
675 | { |
676 | if (DECL_FUNCTION_CODE (edge->callee->decl) == BUILT_IN_VA_ARG_PACK) | |
677 | reason = "external function which calls va_arg_pack"; | |
678 | if (DECL_FUNCTION_CODE (edge->callee->decl) | |
679 | == BUILT_IN_VA_ARG_PACK_LEN) | |
680 | reason = "external function which calls va_arg_pack_len"; | |
681 | } | |
682 | ||
67f3791f | 683 | if (reason && dump_file && !node->alias && !node->thunk) |
464d0118 ML |
684 | fprintf (dump_file, "Function %s is not versionable, reason: %s.\n", |
685 | node->dump_name (), reason); | |
27dbd3ac | 686 | |
7e729474 | 687 | info->versionable = (reason == NULL); |
27dbd3ac RH |
688 | } |
689 | ||
310bc633 MJ |
690 | /* Return true if it is at all technically possible to create clones of a |
691 | NODE. */ | |
692 | ||
ca30a539 | 693 | static bool |
310bc633 | 694 | ipcp_versionable_function_p (struct cgraph_node *node) |
ca30a539 | 695 | { |
a4a3cdd0 MJ |
696 | ipa_node_params *info = ipa_node_params_sum->get (node); |
697 | return info && info->versionable; | |
310bc633 | 698 | } |
ca30a539 | 699 | |
310bc633 | 700 | /* Structure holding accumulated information about callers of a node. */ |
749f25d8 | 701 | |
310bc633 MJ |
702 | struct caller_statistics |
703 | { | |
d1e2e4f9 MJ |
704 | /* If requested (see below), self-recursive call counts are summed into this |
705 | field. */ | |
706 | profile_count rec_count_sum; | |
707 | /* The sum of all ipa counts of all the other (non-recursive) calls. */ | |
3995f3a2 | 708 | profile_count count_sum; |
d1e2e4f9 | 709 | /* Sum of all frequencies for all calls. */ |
b86aedb0 | 710 | sreal freq_sum; |
d1e2e4f9 | 711 | /* Number of calls and hot calls respectively. */ |
b86aedb0 | 712 | int n_calls, n_hot_calls; |
d1e2e4f9 MJ |
713 | /* If itself is set up, also count the number of non-self-recursive |
714 | calls. */ | |
715 | int n_nonrec_calls; | |
716 | /* If non-NULL, this is the node itself and calls from it should have their | |
717 | counts included in rec_count_sum and not count_sum. */ | |
718 | cgraph_node *itself; | |
310bc633 | 719 | }; |
ca30a539 | 720 | |
d1e2e4f9 MJ |
721 | /* Initialize fields of STAT to zeroes and optionally set it up so that edges |
722 | from IGNORED_CALLER are not counted. */ | |
530f3a1b | 723 | |
310bc633 | 724 | static inline void |
d1e2e4f9 | 725 | init_caller_stats (caller_statistics *stats, cgraph_node *itself = NULL) |
310bc633 | 726 | { |
d1e2e4f9 | 727 | stats->rec_count_sum = profile_count::zero (); |
3995f3a2 | 728 | stats->count_sum = profile_count::zero (); |
310bc633 MJ |
729 | stats->n_calls = 0; |
730 | stats->n_hot_calls = 0; | |
d1e2e4f9 | 731 | stats->n_nonrec_calls = 0; |
310bc633 | 732 | stats->freq_sum = 0; |
d1e2e4f9 | 733 | stats->itself = itself; |
310bc633 MJ |
734 | } |
735 | ||
736 | /* Worker callback of cgraph_for_node_and_aliases accumulating statistics of | |
737 | non-thunk incoming edges to NODE. */ | |
738 | ||
739 | static bool | |
740 | gather_caller_stats (struct cgraph_node *node, void *data) | |
741 | { | |
742 | struct caller_statistics *stats = (struct caller_statistics *) data; | |
743 | struct cgraph_edge *cs; | |
744 | ||
745 | for (cs = node->callers; cs; cs = cs->next_caller) | |
67f3791f | 746 | if (!cs->caller->thunk) |
310bc633 | 747 | { |
d1e2e4f9 MJ |
748 | ipa_node_params *info = ipa_node_params_sum->get (cs->caller); |
749 | if (info && info->node_dead) | |
750 | continue; | |
751 | ||
752 | if (cs->count.ipa ().initialized_p ()) | |
753 | { | |
754 | if (stats->itself && stats->itself == cs->caller) | |
755 | stats->rec_count_sum += cs->count.ipa (); | |
756 | else | |
757 | stats->count_sum += cs->count.ipa (); | |
758 | } | |
b86aedb0 | 759 | stats->freq_sum += cs->sreal_frequency (); |
310bc633 | 760 | stats->n_calls++; |
d1e2e4f9 MJ |
761 | if (stats->itself && stats->itself != cs->caller) |
762 | stats->n_nonrec_calls++; | |
763 | ||
3dafb85c | 764 | if (cs->maybe_hot_p ()) |
310bc633 MJ |
765 | stats->n_hot_calls ++; |
766 | } | |
767 | return false; | |
768 | ||
769 | } | |
770 | ||
771 | /* Return true if this NODE is viable candidate for cloning. */ | |
772 | ||
773 | static bool | |
774 | ipcp_cloning_candidate_p (struct cgraph_node *node) | |
775 | { | |
776 | struct caller_statistics stats; | |
777 | ||
d52f5295 | 778 | gcc_checking_assert (node->has_gimple_body_p ()); |
b8698a0f | 779 | |
2bf86c84 | 780 | if (!opt_for_fn (node->decl, flag_ipa_cp_clone)) |
ca30a539 JH |
781 | { |
782 | if (dump_file) | |
155c9907 | 783 | fprintf (dump_file, "Not considering %s for cloning; " |
310bc633 | 784 | "-fipa-cp-clone disabled.\n", |
3629ff8a | 785 | node->dump_name ()); |
ca30a539 JH |
786 | return false; |
787 | } | |
ca30a539 | 788 | |
5af56ae8 | 789 | if (node->optimize_for_size_p ()) |
ca30a539 JH |
790 | { |
791 | if (dump_file) | |
155c9907 | 792 | fprintf (dump_file, "Not considering %s for cloning; " |
310bc633 | 793 | "optimizing it for size.\n", |
3629ff8a | 794 | node->dump_name ()); |
ca30a539 JH |
795 | return false; |
796 | } | |
797 | ||
310bc633 | 798 | init_caller_stats (&stats); |
d52f5295 | 799 | node->call_for_symbol_thunks_and_aliases (gather_caller_stats, &stats, false); |
310bc633 | 800 | |
f658ad30 | 801 | if (ipa_size_summaries->get (node)->self_size < stats.n_calls) |
ca30a539 JH |
802 | { |
803 | if (dump_file) | |
155c9907 | 804 | fprintf (dump_file, "Considering %s for cloning; code might shrink.\n", |
3629ff8a | 805 | node->dump_name ()); |
310bc633 | 806 | return true; |
ca30a539 JH |
807 | } |
808 | ||
809 | /* When profile is available and function is hot, propagate into it even if | |
810 | calls seems cold; constant propagation can improve function's speed | |
61502ca8 | 811 | significantly. */ |
ab100825 MJ |
812 | if (stats.count_sum > profile_count::zero () |
813 | && node->count.ipa ().initialized_p ()) | |
ca30a539 | 814 | { |
1bad9c18 | 815 | if (stats.count_sum > node->count.ipa ().apply_scale (90, 100)) |
ca30a539 JH |
816 | { |
817 | if (dump_file) | |
310bc633 MJ |
818 | fprintf (dump_file, "Considering %s for cloning; " |
819 | "usually called directly.\n", | |
3629ff8a | 820 | node->dump_name ()); |
ca30a539 | 821 | return true; |
155c9907 | 822 | } |
ca30a539 | 823 | } |
310bc633 | 824 | if (!stats.n_hot_calls) |
ca30a539 JH |
825 | { |
826 | if (dump_file) | |
827 | fprintf (dump_file, "Not considering %s for cloning; no hot calls.\n", | |
3629ff8a | 828 | node->dump_name ()); |
ed102b70 | 829 | return false; |
ca30a539 JH |
830 | } |
831 | if (dump_file) | |
832 | fprintf (dump_file, "Considering %s for cloning.\n", | |
3629ff8a | 833 | node->dump_name ()); |
ca30a539 JH |
834 | return true; |
835 | } | |
836 | ||
c0cb5055 MJ |
837 | template <typename valtype> |
838 | class value_topo_info | |
839 | { | |
840 | public: | |
841 | /* Head of the linked list of topologically sorted values. */ | |
842 | ipcp_value<valtype> *values_topo; | |
843 | /* Stack for creating SCCs, represented by a linked list too. */ | |
844 | ipcp_value<valtype> *stack; | |
845 | /* Counter driving the algorithm in add_val_to_toposort. */ | |
846 | int dfs_counter; | |
847 | ||
848 | value_topo_info () : values_topo (NULL), stack (NULL), dfs_counter (0) | |
849 | {} | |
850 | void add_val (ipcp_value<valtype> *cur_val); | |
851 | void propagate_effects (); | |
852 | }; | |
853 | ||
310bc633 | 854 | /* Arrays representing a topological ordering of call graph nodes and a stack |
c0cb5055 MJ |
855 | of nodes used during constant propagation and also data required to perform |
856 | topological sort of values and propagation of benefits in the determined | |
857 | order. */ | |
3949c4a7 | 858 | |
c0cb5055 | 859 | class ipa_topo_info |
3949c4a7 | 860 | { |
c0cb5055 MJ |
861 | public: |
862 | /* Array with obtained topological order of cgraph nodes. */ | |
310bc633 | 863 | struct cgraph_node **order; |
c0cb5055 MJ |
864 | /* Stack of cgraph nodes used during propagation within SCC until all values |
865 | in the SCC stabilize. */ | |
310bc633 MJ |
866 | struct cgraph_node **stack; |
867 | int nnodes, stack_top; | |
c0cb5055 MJ |
868 | |
869 | value_topo_info<tree> constants; | |
44210a96 | 870 | value_topo_info<ipa_polymorphic_call_context> contexts; |
c0cb5055 MJ |
871 | |
872 | ipa_topo_info () : order(NULL), stack(NULL), nnodes(0), stack_top(0), | |
873 | constants () | |
874 | {} | |
310bc633 MJ |
875 | }; |
876 | ||
97e59627 ML |
877 | /* Skip edges from and to nodes without ipa_cp enabled. |
878 | Ignore not available symbols. */ | |
879 | ||
880 | static bool | |
881 | ignore_edge_p (cgraph_edge *e) | |
882 | { | |
883 | enum availability avail; | |
884 | cgraph_node *ultimate_target | |
885 | = e->callee->function_or_virtual_thunk_symbol (&avail, e->caller); | |
886 | ||
887 | return (avail <= AVAIL_INTERPOSABLE | |
e72763e2 | 888 | || !opt_for_fn (ultimate_target->decl, optimize) |
97e59627 ML |
889 | || !opt_for_fn (ultimate_target->decl, flag_ipa_cp)); |
890 | } | |
891 | ||
310bc633 MJ |
892 | /* Allocate the arrays in TOPO and topologically sort the nodes into order. */ |
893 | ||
894 | static void | |
99b1c316 | 895 | build_toporder_info (class ipa_topo_info *topo) |
310bc633 | 896 | { |
3dafb85c ML |
897 | topo->order = XCNEWVEC (struct cgraph_node *, symtab->cgraph_count); |
898 | topo->stack = XCNEWVEC (struct cgraph_node *, symtab->cgraph_count); | |
899 | ||
c0cb5055 | 900 | gcc_checking_assert (topo->stack_top == 0); |
97e59627 ML |
901 | topo->nnodes = ipa_reduced_postorder (topo->order, true, |
902 | ignore_edge_p); | |
3949c4a7 MJ |
903 | } |
904 | ||
310bc633 MJ |
905 | /* Free information about strongly connected components and the arrays in |
906 | TOPO. */ | |
907 | ||
518dc859 | 908 | static void |
99b1c316 | 909 | free_toporder_info (class ipa_topo_info *topo) |
310bc633 MJ |
910 | { |
911 | ipa_free_postorder_info (); | |
912 | free (topo->order); | |
913 | free (topo->stack); | |
914 | } | |
915 | ||
916 | /* Add NODE to the stack in TOPO, unless it is already there. */ | |
917 | ||
918 | static inline void | |
99b1c316 | 919 | push_node_to_stack (class ipa_topo_info *topo, struct cgraph_node *node) |
518dc859 | 920 | { |
a4a3cdd0 | 921 | ipa_node_params *info = ipa_node_params_sum->get (node); |
310bc633 MJ |
922 | if (info->node_enqueued) |
923 | return; | |
924 | info->node_enqueued = 1; | |
925 | topo->stack[topo->stack_top++] = node; | |
926 | } | |
518dc859 | 927 | |
310bc633 MJ |
928 | /* Pop a node from the stack in TOPO and return it or return NULL if the stack |
929 | is empty. */ | |
ca30a539 | 930 | |
310bc633 | 931 | static struct cgraph_node * |
99b1c316 | 932 | pop_node_from_stack (class ipa_topo_info *topo) |
310bc633 MJ |
933 | { |
934 | if (topo->stack_top) | |
3949c4a7 | 935 | { |
310bc633 MJ |
936 | struct cgraph_node *node; |
937 | topo->stack_top--; | |
938 | node = topo->stack[topo->stack_top]; | |
a4a3cdd0 | 939 | ipa_node_params_sum->get (node)->node_enqueued = 0; |
310bc633 | 940 | return node; |
3949c4a7 | 941 | } |
310bc633 MJ |
942 | else |
943 | return NULL; | |
518dc859 RL |
944 | } |
945 | ||
310bc633 MJ |
946 | /* Set lattice LAT to bottom and return true if it previously was not set as |
947 | such. */ | |
948 | ||
c0cb5055 MJ |
949 | template <typename valtype> |
950 | inline bool | |
951 | ipcp_lattice<valtype>::set_to_bottom () | |
518dc859 | 952 | { |
c0cb5055 MJ |
953 | bool ret = !bottom; |
954 | bottom = true; | |
310bc633 MJ |
955 | return ret; |
956 | } | |
518dc859 | 957 | |
310bc633 MJ |
958 | /* Mark lattice as containing an unknown value and return true if it previously |
959 | was not marked as such. */ | |
129a37fc | 960 | |
c0cb5055 MJ |
961 | template <typename valtype> |
962 | inline bool | |
963 | ipcp_lattice<valtype>::set_contains_variable () | |
310bc633 | 964 | { |
c0cb5055 MJ |
965 | bool ret = !contains_variable; |
966 | contains_variable = true; | |
310bc633 | 967 | return ret; |
518dc859 RL |
968 | } |
969 | ||
f25ae20e | 970 | /* Set all aggregate lattices in PLATS to bottom and return true if they were |
2c9561b5 MJ |
971 | not previously set as such. */ |
972 | ||
973 | static inline bool | |
99b1c316 | 974 | set_agg_lats_to_bottom (class ipcp_param_lattices *plats) |
2c9561b5 MJ |
975 | { |
976 | bool ret = !plats->aggs_bottom; | |
977 | plats->aggs_bottom = true; | |
978 | return ret; | |
979 | } | |
980 | ||
f25ae20e | 981 | /* Mark all aggregate lattices in PLATS as containing an unknown value and |
2c9561b5 MJ |
982 | return true if they were not previously marked as such. */ |
983 | ||
984 | static inline bool | |
99b1c316 | 985 | set_agg_lats_contain_variable (class ipcp_param_lattices *plats) |
2c9561b5 MJ |
986 | { |
987 | bool ret = !plats->aggs_contain_variable; | |
988 | plats->aggs_contain_variable = true; | |
989 | return ret; | |
990 | } | |
991 | ||
8bc5448f KV |
992 | bool |
993 | ipcp_vr_lattice::meet_with (const ipcp_vr_lattice &other) | |
994 | { | |
995 | return meet_with_1 (&other.m_vr); | |
996 | } | |
997 | ||
f25ae20e | 998 | /* Meet the current value of the lattice with value range described by VR |
8bc5448f KV |
999 | lattice. */ |
1000 | ||
1001 | bool | |
028d81b1 | 1002 | ipcp_vr_lattice::meet_with (const value_range *p_vr) |
8bc5448f KV |
1003 | { |
1004 | return meet_with_1 (p_vr); | |
1005 | } | |
1006 | ||
54994253 AH |
1007 | /* Meet the current value of the lattice with value range described by |
1008 | OTHER_VR lattice. Return TRUE if anything changed. */ | |
8bc5448f KV |
1009 | |
1010 | bool | |
028d81b1 | 1011 | ipcp_vr_lattice::meet_with_1 (const value_range *other_vr) |
8bc5448f | 1012 | { |
8bc5448f KV |
1013 | if (bottom_p ()) |
1014 | return false; | |
1015 | ||
54994253 | 1016 | if (other_vr->varying_p ()) |
8bc5448f KV |
1017 | return set_to_bottom (); |
1018 | ||
028d81b1 | 1019 | value_range save (m_vr); |
54994253 | 1020 | m_vr.union_ (other_vr); |
ff361cc6 | 1021 | return !m_vr.equal_p (save); |
8bc5448f KV |
1022 | } |
1023 | ||
1024 | /* Return true if value range information in the lattice is yet unknown. */ | |
1025 | ||
1026 | bool | |
1027 | ipcp_vr_lattice::top_p () const | |
1028 | { | |
54994253 | 1029 | return m_vr.undefined_p (); |
8bc5448f KV |
1030 | } |
1031 | ||
1032 | /* Return true if value range information in the lattice is known to be | |
1033 | unusable. */ | |
1034 | ||
1035 | bool | |
1036 | ipcp_vr_lattice::bottom_p () const | |
1037 | { | |
54994253 | 1038 | return m_vr.varying_p (); |
8bc5448f KV |
1039 | } |
1040 | ||
1041 | /* Set value range information in the lattice to bottom. Return true if it | |
1042 | previously was in a different state. */ | |
1043 | ||
1044 | bool | |
1045 | ipcp_vr_lattice::set_to_bottom () | |
1046 | { | |
54994253 | 1047 | if (m_vr.varying_p ()) |
8bc5448f | 1048 | return false; |
97ecc8d5 AH |
1049 | /* ?? We create all sorts of VARYING ranges for floats, structures, |
1050 | and other types which we cannot handle as ranges. We should | |
1051 | probably avoid handling them throughout the pass, but it's easier | |
1052 | to create a sensible VARYING here and let the lattice | |
1053 | propagate. */ | |
1054 | m_vr.set_varying (integer_type_node); | |
8bc5448f KV |
1055 | return true; |
1056 | } | |
1057 | ||
209ca542 PK |
1058 | /* Set lattice value to bottom, if it already isn't the case. */ |
1059 | ||
1060 | bool | |
1061 | ipcp_bits_lattice::set_to_bottom () | |
1062 | { | |
1063 | if (bottom_p ()) | |
1064 | return false; | |
1065 | m_lattice_val = IPA_BITS_VARYING; | |
1066 | m_value = 0; | |
1067 | m_mask = -1; | |
1068 | return true; | |
1069 | } | |
1070 | ||
1071 | /* Set to constant if it isn't already. Only meant to be called | |
1072 | when switching state from TOP. */ | |
1073 | ||
1074 | bool | |
1075 | ipcp_bits_lattice::set_to_constant (widest_int value, widest_int mask) | |
1076 | { | |
1077 | gcc_assert (top_p ()); | |
1078 | m_lattice_val = IPA_BITS_CONSTANT; | |
d58f078c | 1079 | m_value = wi::bit_and (wi::bit_not (mask), value); |
209ca542 PK |
1080 | m_mask = mask; |
1081 | return true; | |
1082 | } | |
1083 | ||
1084 | /* Convert operand to value, mask form. */ | |
1085 | ||
1086 | void | |
1087 | ipcp_bits_lattice::get_value_and_mask (tree operand, widest_int *valuep, widest_int *maskp) | |
1088 | { | |
1089 | wide_int get_nonzero_bits (const_tree); | |
1090 | ||
1091 | if (TREE_CODE (operand) == INTEGER_CST) | |
1092 | { | |
155c9907 | 1093 | *valuep = wi::to_widest (operand); |
209ca542 PK |
1094 | *maskp = 0; |
1095 | } | |
1096 | else | |
1097 | { | |
1098 | *valuep = 0; | |
1099 | *maskp = -1; | |
1100 | } | |
1101 | } | |
1102 | ||
1103 | /* Meet operation, similar to ccp_lattice_meet, we xor values | |
1104 | if this->value, value have different values at same bit positions, we want | |
1105 | to drop that bit to varying. Return true if mask is changed. | |
1106 | This function assumes that the lattice value is in CONSTANT state */ | |
1107 | ||
1108 | bool | |
1109 | ipcp_bits_lattice::meet_with_1 (widest_int value, widest_int mask, | |
1110 | unsigned precision) | |
1111 | { | |
1112 | gcc_assert (constant_p ()); | |
155c9907 JJ |
1113 | |
1114 | widest_int old_mask = m_mask; | |
209ca542 | 1115 | m_mask = (m_mask | mask) | (m_value ^ value); |
f9177021 | 1116 | m_value &= ~m_mask; |
209ca542 PK |
1117 | |
1118 | if (wi::sext (m_mask, precision) == -1) | |
1119 | return set_to_bottom (); | |
1120 | ||
1121 | return m_mask != old_mask; | |
1122 | } | |
1123 | ||
1124 | /* Meet the bits lattice with operand | |
1125 | described by <value, mask, sgn, precision. */ | |
1126 | ||
1127 | bool | |
1128 | ipcp_bits_lattice::meet_with (widest_int value, widest_int mask, | |
1129 | unsigned precision) | |
1130 | { | |
1131 | if (bottom_p ()) | |
1132 | return false; | |
1133 | ||
1134 | if (top_p ()) | |
1135 | { | |
1136 | if (wi::sext (mask, precision) == -1) | |
1137 | return set_to_bottom (); | |
155c9907 | 1138 | return set_to_constant (value, mask); |
209ca542 PK |
1139 | } |
1140 | ||
1141 | return meet_with_1 (value, mask, precision); | |
1142 | } | |
1143 | ||
1144 | /* Meet bits lattice with the result of bit_value_binop (other, operand) | |
1145 | if code is binary operation or bit_value_unop (other) if code is unary op. | |
1146 | In the case when code is nop_expr, no adjustment is required. */ | |
1147 | ||
1148 | bool | |
1149 | ipcp_bits_lattice::meet_with (ipcp_bits_lattice& other, unsigned precision, | |
1150 | signop sgn, enum tree_code code, tree operand) | |
1151 | { | |
1152 | if (other.bottom_p ()) | |
1153 | return set_to_bottom (); | |
1154 | ||
1155 | if (bottom_p () || other.top_p ()) | |
1156 | return false; | |
1157 | ||
1158 | widest_int adjusted_value, adjusted_mask; | |
1159 | ||
1160 | if (TREE_CODE_CLASS (code) == tcc_binary) | |
1161 | { | |
1162 | tree type = TREE_TYPE (operand); | |
209ca542 PK |
1163 | widest_int o_value, o_mask; |
1164 | get_value_and_mask (operand, &o_value, &o_mask); | |
1165 | ||
1166 | bit_value_binop (code, sgn, precision, &adjusted_value, &adjusted_mask, | |
1167 | sgn, precision, other.get_value (), other.get_mask (), | |
1168 | TYPE_SIGN (type), TYPE_PRECISION (type), o_value, o_mask); | |
1169 | ||
1170 | if (wi::sext (adjusted_mask, precision) == -1) | |
1171 | return set_to_bottom (); | |
1172 | } | |
1173 | ||
1174 | else if (TREE_CODE_CLASS (code) == tcc_unary) | |
1175 | { | |
1176 | bit_value_unop (code, sgn, precision, &adjusted_value, | |
1177 | &adjusted_mask, sgn, precision, other.get_value (), | |
1178 | other.get_mask ()); | |
1179 | ||
1180 | if (wi::sext (adjusted_mask, precision) == -1) | |
1181 | return set_to_bottom (); | |
1182 | } | |
1183 | ||
209ca542 PK |
1184 | else |
1185 | return set_to_bottom (); | |
1186 | ||
1187 | if (top_p ()) | |
1188 | { | |
1189 | if (wi::sext (adjusted_mask, precision) == -1) | |
1190 | return set_to_bottom (); | |
155c9907 | 1191 | return set_to_constant (adjusted_value, adjusted_mask); |
209ca542 PK |
1192 | } |
1193 | else | |
1194 | return meet_with_1 (adjusted_value, adjusted_mask, precision); | |
1195 | } | |
1196 | ||
2c9561b5 MJ |
1197 | /* Mark bot aggregate and scalar lattices as containing an unknown variable, |
1198 | return true is any of them has not been marked as such so far. */ | |
1199 | ||
1200 | static inline bool | |
99b1c316 | 1201 | set_all_contains_variable (class ipcp_param_lattices *plats) |
2c9561b5 | 1202 | { |
44210a96 MJ |
1203 | bool ret; |
1204 | ret = plats->itself.set_contains_variable (); | |
1205 | ret |= plats->ctxlat.set_contains_variable (); | |
1206 | ret |= set_agg_lats_contain_variable (plats); | |
209ca542 | 1207 | ret |= plats->bits_lattice.set_to_bottom (); |
8bc5448f | 1208 | ret |= plats->m_value_range.set_to_bottom (); |
2c9561b5 MJ |
1209 | return ret; |
1210 | } | |
1211 | ||
af21714c MJ |
1212 | /* Worker of call_for_symbol_thunks_and_aliases, increment the integer DATA |
1213 | points to by the number of callers to NODE. */ | |
1214 | ||
1215 | static bool | |
1216 | count_callers (cgraph_node *node, void *data) | |
1217 | { | |
1218 | int *caller_count = (int *) data; | |
1219 | ||
1220 | for (cgraph_edge *cs = node->callers; cs; cs = cs->next_caller) | |
67914693 | 1221 | /* Local thunks can be handled transparently, but if the thunk cannot |
af21714c | 1222 | be optimized out, count it as a real use. */ |
67f3791f | 1223 | if (!cs->caller->thunk || !cs->caller->local) |
af21714c MJ |
1224 | ++*caller_count; |
1225 | return false; | |
1226 | } | |
1227 | ||
1228 | /* Worker of call_for_symbol_thunks_and_aliases, it is supposed to be called on | |
1229 | the one caller of some other node. Set the caller's corresponding flag. */ | |
1230 | ||
1231 | static bool | |
1232 | set_single_call_flag (cgraph_node *node, void *) | |
1233 | { | |
1234 | cgraph_edge *cs = node->callers; | |
1235 | /* Local thunks can be handled transparently, skip them. */ | |
67f3791f | 1236 | while (cs && cs->caller->thunk && cs->caller->local) |
af21714c | 1237 | cs = cs->next_caller; |
a4a3cdd0 MJ |
1238 | if (cs) |
1239 | if (ipa_node_params* info = ipa_node_params_sum->get (cs->caller)) | |
1240 | { | |
1241 | info->node_calling_single_call = true; | |
1242 | return true; | |
1243 | } | |
af21714c MJ |
1244 | return false; |
1245 | } | |
1246 | ||
310bc633 | 1247 | /* Initialize ipcp_lattices. */ |
43558bcc | 1248 | |
518dc859 | 1249 | static void |
310bc633 | 1250 | initialize_node_lattices (struct cgraph_node *node) |
518dc859 | 1251 | { |
a4a3cdd0 | 1252 | ipa_node_params *info = ipa_node_params_sum->get (node); |
310bc633 MJ |
1253 | struct cgraph_edge *ie; |
1254 | bool disable = false, variable = false; | |
1255 | int i; | |
518dc859 | 1256 | |
d52f5295 | 1257 | gcc_checking_assert (node->has_gimple_body_p ()); |
ff6686d2 MJ |
1258 | |
1259 | if (!ipa_get_param_count (info)) | |
1260 | disable = true; | |
87f94429 | 1261 | else if (node->local) |
af21714c MJ |
1262 | { |
1263 | int caller_count = 0; | |
1264 | node->call_for_symbol_thunks_and_aliases (count_callers, &caller_count, | |
1265 | true); | |
1266 | gcc_checking_assert (caller_count > 0); | |
1267 | if (caller_count == 1) | |
1268 | node->call_for_symbol_thunks_and_aliases (set_single_call_flag, | |
1269 | NULL, true); | |
1270 | } | |
1271 | else | |
310bc633 MJ |
1272 | { |
1273 | /* When cloning is allowed, we can assume that externally visible | |
1274 | functions are not called. We will compensate this by cloning | |
1275 | later. */ | |
1276 | if (ipcp_versionable_function_p (node) | |
1277 | && ipcp_cloning_candidate_p (node)) | |
1278 | variable = true; | |
1279 | else | |
1280 | disable = true; | |
1281 | } | |
518dc859 | 1282 | |
ff6686d2 | 1283 | if (dump_file && (dump_flags & TDF_DETAILS) |
67f3791f | 1284 | && !node->alias && !node->thunk) |
8bc5448f | 1285 | { |
ff6686d2 MJ |
1286 | fprintf (dump_file, "Initializing lattices of %s\n", |
1287 | node->dump_name ()); | |
1288 | if (disable || variable) | |
1289 | fprintf (dump_file, " Marking all lattices as %s\n", | |
1290 | disable ? "BOTTOM" : "VARIABLE"); | |
8bc5448f KV |
1291 | } |
1292 | ||
ff6686d2 MJ |
1293 | auto_vec<bool, 16> surviving_params; |
1294 | bool pre_modified = false; | |
ae7a23a3 JH |
1295 | |
1296 | clone_info *cinfo = clone_info::get (node); | |
1297 | ||
1298 | if (!disable && cinfo && cinfo->param_adjustments) | |
310bc633 | 1299 | { |
ff6686d2 MJ |
1300 | /* At the moment all IPA optimizations should use the number of |
1301 | parameters of the prevailing decl as the m_always_copy_start. | |
1302 | Handling any other value would complicate the code below, so for the | |
1303 | time bing let's only assert it is so. */ | |
ae7a23a3 | 1304 | gcc_assert ((cinfo->param_adjustments->m_always_copy_start |
ff6686d2 | 1305 | == ipa_get_param_count (info)) |
ae7a23a3 | 1306 | || cinfo->param_adjustments->m_always_copy_start < 0); |
ff6686d2 MJ |
1307 | |
1308 | pre_modified = true; | |
ae7a23a3 | 1309 | cinfo->param_adjustments->get_surviving_params (&surviving_params); |
ff6686d2 MJ |
1310 | |
1311 | if (dump_file && (dump_flags & TDF_DETAILS) | |
67f3791f | 1312 | && !node->alias && !node->thunk) |
310bc633 | 1313 | { |
ff6686d2 MJ |
1314 | bool first = true; |
1315 | for (int j = 0; j < ipa_get_param_count (info); j++) | |
2c9561b5 | 1316 | { |
ff6686d2 MJ |
1317 | if (j < (int) surviving_params.length () |
1318 | && surviving_params[j]) | |
1319 | continue; | |
1320 | if (first) | |
1321 | { | |
1322 | fprintf (dump_file, | |
1323 | " The following parameters are dead on arrival:"); | |
1324 | first = false; | |
1325 | } | |
1326 | fprintf (dump_file, " %u", j); | |
2c9561b5 | 1327 | } |
ff6686d2 MJ |
1328 | if (!first) |
1329 | fprintf (dump_file, "\n"); | |
1330 | } | |
1331 | } | |
1332 | ||
1333 | for (i = 0; i < ipa_get_param_count (info); i++) | |
1334 | { | |
1335 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
1336 | if (disable | |
f225c6b0 | 1337 | || !ipa_get_type (info, i) |
ff6686d2 MJ |
1338 | || (pre_modified && (surviving_params.length () <= (unsigned) i |
1339 | || !surviving_params[i]))) | |
1340 | { | |
1341 | plats->itself.set_to_bottom (); | |
1342 | plats->ctxlat.set_to_bottom (); | |
1343 | set_agg_lats_to_bottom (plats); | |
1344 | plats->bits_lattice.set_to_bottom (); | |
4ba9fb0a | 1345 | plats->m_value_range.m_vr = value_range (); |
ff6686d2 MJ |
1346 | plats->m_value_range.set_to_bottom (); |
1347 | } | |
1348 | else | |
1349 | { | |
1350 | plats->m_value_range.init (); | |
1351 | if (variable) | |
2c9561b5 | 1352 | set_all_contains_variable (plats); |
310bc633 | 1353 | } |
310bc633 | 1354 | } |
518dc859 | 1355 | |
310bc633 | 1356 | for (ie = node->indirect_calls; ie; ie = ie->next_callee) |
1d5755ef | 1357 | if (ie->indirect_info->polymorphic |
155c9907 | 1358 | && ie->indirect_info->param_index >= 0) |
0818c24c | 1359 | { |
310bc633 | 1360 | gcc_checking_assert (ie->indirect_info->param_index >= 0); |
2c9561b5 MJ |
1361 | ipa_get_parm_lattices (info, |
1362 | ie->indirect_info->param_index)->virt_call = 1; | |
0818c24c | 1363 | } |
518dc859 RL |
1364 | } |
1365 | ||
f225c6b0 MJ |
1366 | /* Return true if VALUE can be safely IPA-CP propagated to a parameter of type |
1367 | PARAM_TYPE. */ | |
1368 | ||
1369 | static bool | |
1370 | ipacp_value_safe_for_type (tree param_type, tree value) | |
1371 | { | |
1372 | tree val_type = TREE_TYPE (value); | |
1373 | if (param_type == val_type | |
1374 | || useless_type_conversion_p (param_type, val_type) | |
1375 | || fold_convertible_p (param_type, value)) | |
1376 | return true; | |
1377 | else | |
1378 | return false; | |
1379 | } | |
1380 | ||
f38a33a2 MJ |
1381 | /* Return true iff X and Y should be considered equal values by IPA-CP. */ |
1382 | ||
1383 | static bool | |
1384 | values_equal_for_ipcp_p (tree x, tree y) | |
1385 | { | |
1386 | gcc_checking_assert (x != NULL_TREE && y != NULL_TREE); | |
1387 | ||
1388 | if (x == y) | |
1389 | return true; | |
1390 | ||
1391 | if (TREE_CODE (x) == ADDR_EXPR | |
1392 | && TREE_CODE (y) == ADDR_EXPR | |
1393 | && TREE_CODE (TREE_OPERAND (x, 0)) == CONST_DECL | |
1394 | && TREE_CODE (TREE_OPERAND (y, 0)) == CONST_DECL) | |
1395 | return operand_equal_p (DECL_INITIAL (TREE_OPERAND (x, 0)), | |
1396 | DECL_INITIAL (TREE_OPERAND (y, 0)), 0); | |
1397 | else | |
1398 | return operand_equal_p (x, y, 0); | |
1399 | } | |
1400 | ||
eb270950 FX |
1401 | /* Return the result of a (possibly arithmetic) operation on the constant |
1402 | value INPUT. OPERAND is 2nd operand for binary operation. RES_TYPE is | |
1403 | the type of the parameter to which the result is passed. Return | |
1404 | NULL_TREE if that cannot be determined or be considered an | |
1405 | interprocedural invariant. */ | |
3949c4a7 | 1406 | |
310bc633 | 1407 | static tree |
eb270950 FX |
1408 | ipa_get_jf_arith_result (enum tree_code opcode, tree input, tree operand, |
1409 | tree res_type) | |
3949c4a7 | 1410 | { |
e5cf5e11 | 1411 | tree res; |
3949c4a7 | 1412 | |
eb270950 | 1413 | if (opcode == NOP_EXPR) |
310bc633 | 1414 | return input; |
04643334 MJ |
1415 | if (!is_gimple_ip_invariant (input)) |
1416 | return NULL_TREE; | |
3949c4a7 | 1417 | |
f38a33a2 MJ |
1418 | if (opcode == ASSERT_EXPR) |
1419 | { | |
1420 | if (values_equal_for_ipcp_p (input, operand)) | |
1421 | return input; | |
1422 | else | |
1423 | return NULL_TREE; | |
1424 | } | |
1425 | ||
e5cf5e11 | 1426 | if (!res_type) |
a2b4c188 | 1427 | { |
e5cf5e11 PK |
1428 | if (TREE_CODE_CLASS (opcode) == tcc_comparison) |
1429 | res_type = boolean_type_node; | |
1430 | else if (expr_type_first_operand_type_p (opcode)) | |
1431 | res_type = TREE_TYPE (input); | |
a2b4c188 | 1432 | else |
e5cf5e11 | 1433 | return NULL_TREE; |
a2b4c188 | 1434 | } |
e5cf5e11 PK |
1435 | |
1436 | if (TREE_CODE_CLASS (opcode) == tcc_unary) | |
1437 | res = fold_unary (opcode, res_type, input); | |
1438 | else | |
eb270950 | 1439 | res = fold_binary (opcode, res_type, input, operand); |
e5cf5e11 | 1440 | |
310bc633 MJ |
1441 | if (res && !is_gimple_ip_invariant (res)) |
1442 | return NULL_TREE; | |
3949c4a7 | 1443 | |
310bc633 | 1444 | return res; |
3949c4a7 MJ |
1445 | } |
1446 | ||
eb270950 FX |
1447 | /* Return the result of a (possibly arithmetic) pass through jump function |
1448 | JFUNC on the constant value INPUT. RES_TYPE is the type of the parameter | |
1449 | to which the result is passed. Return NULL_TREE if that cannot be | |
1450 | determined or be considered an interprocedural invariant. */ | |
1451 | ||
1452 | static tree | |
1453 | ipa_get_jf_pass_through_result (struct ipa_jump_func *jfunc, tree input, | |
1454 | tree res_type) | |
1455 | { | |
1456 | return ipa_get_jf_arith_result (ipa_get_jf_pass_through_operation (jfunc), | |
1457 | input, | |
1458 | ipa_get_jf_pass_through_operand (jfunc), | |
1459 | res_type); | |
1460 | } | |
1461 | ||
310bc633 MJ |
1462 | /* Return the result of an ancestor jump function JFUNC on the constant value |
1463 | INPUT. Return NULL_TREE if that cannot be determined. */ | |
3949c4a7 | 1464 | |
310bc633 MJ |
1465 | static tree |
1466 | ipa_get_jf_ancestor_result (struct ipa_jump_func *jfunc, tree input) | |
3949c4a7 | 1467 | { |
44210a96 MJ |
1468 | gcc_checking_assert (TREE_CODE (input) != TREE_BINFO); |
1469 | if (TREE_CODE (input) == ADDR_EXPR) | |
3949c4a7 | 1470 | { |
f3280e4c RB |
1471 | gcc_checking_assert (is_gimple_ip_invariant_address (input)); |
1472 | poly_int64 off = ipa_get_jf_ancestor_offset (jfunc); | |
1473 | if (known_eq (off, 0)) | |
1474 | return input; | |
7d4549b2 | 1475 | poly_int64 byte_offset = exact_div (off, BITS_PER_UNIT); |
f3280e4c | 1476 | return build1 (ADDR_EXPR, TREE_TYPE (input), |
7d4549b2 ML |
1477 | fold_build2 (MEM_REF, TREE_TYPE (TREE_TYPE (input)), input, |
1478 | build_int_cst (ptr_type_node, byte_offset))); | |
3949c4a7 MJ |
1479 | } |
1480 | else | |
310bc633 MJ |
1481 | return NULL_TREE; |
1482 | } | |
3949c4a7 | 1483 | |
44210a96 MJ |
1484 | /* Determine whether JFUNC evaluates to a single known constant value and if |
1485 | so, return it. Otherwise return NULL. INFO describes the caller node or | |
1486 | the one it is inlined to, so that pass-through jump functions can be | |
e5cf5e11 PK |
1487 | evaluated. PARM_TYPE is the type of the parameter to which the result is |
1488 | passed. */ | |
310bc633 | 1489 | |
d2d668fb | 1490 | tree |
99b1c316 | 1491 | ipa_value_from_jfunc (class ipa_node_params *info, struct ipa_jump_func *jfunc, |
e5cf5e11 | 1492 | tree parm_type) |
310bc633 MJ |
1493 | { |
1494 | if (jfunc->type == IPA_JF_CONST) | |
7b872d9e | 1495 | return ipa_get_jf_constant (jfunc); |
310bc633 MJ |
1496 | else if (jfunc->type == IPA_JF_PASS_THROUGH |
1497 | || jfunc->type == IPA_JF_ANCESTOR) | |
3949c4a7 | 1498 | { |
310bc633 MJ |
1499 | tree input; |
1500 | int idx; | |
3949c4a7 | 1501 | |
310bc633 | 1502 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
7b872d9e | 1503 | idx = ipa_get_jf_pass_through_formal_id (jfunc); |
310bc633 | 1504 | else |
7b872d9e | 1505 | idx = ipa_get_jf_ancestor_formal_id (jfunc); |
3949c4a7 | 1506 | |
310bc633 | 1507 | if (info->ipcp_orig_node) |
44210a96 | 1508 | input = info->known_csts[idx]; |
310bc633 | 1509 | else |
3949c4a7 | 1510 | { |
c0cb5055 | 1511 | ipcp_lattice<tree> *lat; |
310bc633 | 1512 | |
370a7814 JH |
1513 | if (!info->lattices |
1514 | || idx >= ipa_get_param_count (info)) | |
2bf86c84 | 1515 | return NULL_TREE; |
2c9561b5 | 1516 | lat = ipa_get_scalar_lat (info, idx); |
c0cb5055 | 1517 | if (!lat->is_single_const ()) |
310bc633 MJ |
1518 | return NULL_TREE; |
1519 | input = lat->values->value; | |
1520 | } | |
1521 | ||
1522 | if (!input) | |
1523 | return NULL_TREE; | |
1524 | ||
1525 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
e5cf5e11 | 1526 | return ipa_get_jf_pass_through_result (jfunc, input, parm_type); |
310bc633 | 1527 | else |
7b872d9e | 1528 | return ipa_get_jf_ancestor_result (jfunc, input); |
3949c4a7 | 1529 | } |
310bc633 MJ |
1530 | else |
1531 | return NULL_TREE; | |
3949c4a7 MJ |
1532 | } |
1533 | ||
f25ae20e | 1534 | /* Determine whether JFUNC evaluates to single known polymorphic context, given |
44210a96 MJ |
1535 | that INFO describes the caller node or the one it is inlined to, CS is the |
1536 | call graph edge corresponding to JFUNC and CSIDX index of the described | |
1537 | parameter. */ | |
1538 | ||
1539 | ipa_polymorphic_call_context | |
1540 | ipa_context_from_jfunc (ipa_node_params *info, cgraph_edge *cs, int csidx, | |
1541 | ipa_jump_func *jfunc) | |
1542 | { | |
a4a3cdd0 | 1543 | ipa_edge_args *args = ipa_edge_args_sum->get (cs); |
44210a96 MJ |
1544 | ipa_polymorphic_call_context ctx; |
1545 | ipa_polymorphic_call_context *edge_ctx | |
1546 | = cs ? ipa_get_ith_polymorhic_call_context (args, csidx) : NULL; | |
1547 | ||
1548 | if (edge_ctx && !edge_ctx->useless_p ()) | |
1549 | ctx = *edge_ctx; | |
1550 | ||
1551 | if (jfunc->type == IPA_JF_PASS_THROUGH | |
1552 | || jfunc->type == IPA_JF_ANCESTOR) | |
1553 | { | |
1554 | ipa_polymorphic_call_context srcctx; | |
1555 | int srcidx; | |
df0d8136 | 1556 | bool type_preserved = true; |
44210a96 MJ |
1557 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
1558 | { | |
df0d8136 | 1559 | if (ipa_get_jf_pass_through_operation (jfunc) != NOP_EXPR) |
44210a96 | 1560 | return ctx; |
df0d8136 | 1561 | type_preserved = ipa_get_jf_pass_through_type_preserved (jfunc); |
44210a96 MJ |
1562 | srcidx = ipa_get_jf_pass_through_formal_id (jfunc); |
1563 | } | |
1564 | else | |
1565 | { | |
df0d8136 | 1566 | type_preserved = ipa_get_jf_ancestor_type_preserved (jfunc); |
44210a96 MJ |
1567 | srcidx = ipa_get_jf_ancestor_formal_id (jfunc); |
1568 | } | |
1569 | if (info->ipcp_orig_node) | |
1570 | { | |
1571 | if (info->known_contexts.exists ()) | |
1572 | srcctx = info->known_contexts[srcidx]; | |
1573 | } | |
1574 | else | |
1575 | { | |
370a7814 JH |
1576 | if (!info->lattices |
1577 | || srcidx >= ipa_get_param_count (info)) | |
2bf86c84 | 1578 | return ctx; |
44210a96 MJ |
1579 | ipcp_lattice<ipa_polymorphic_call_context> *lat; |
1580 | lat = ipa_get_poly_ctx_lat (info, srcidx); | |
1581 | if (!lat->is_single_const ()) | |
1582 | return ctx; | |
1583 | srcctx = lat->values->value; | |
1584 | } | |
1585 | if (srcctx.useless_p ()) | |
1586 | return ctx; | |
1587 | if (jfunc->type == IPA_JF_ANCESTOR) | |
1588 | srcctx.offset_by (ipa_get_jf_ancestor_offset (jfunc)); | |
df0d8136 JH |
1589 | if (!type_preserved) |
1590 | srcctx.possible_dynamic_type_change (cs->in_polymorphic_cdtor); | |
1591 | srcctx.combine_with (ctx); | |
1592 | return srcctx; | |
44210a96 MJ |
1593 | } |
1594 | ||
1595 | return ctx; | |
1596 | } | |
3949c4a7 | 1597 | |
68718e8e JH |
1598 | /* Emulate effects of unary OPERATION and/or conversion from SRC_TYPE to |
1599 | DST_TYPE on value range in SRC_VR and store it to DST_VR. Return true if | |
1600 | the result is a range or an anti-range. */ | |
1601 | ||
1602 | static bool | |
1603 | ipa_vr_operation_and_type_effects (value_range *dst_vr, | |
1604 | value_range *src_vr, | |
1605 | enum tree_code operation, | |
1606 | tree dst_type, tree src_type) | |
1607 | { | |
1608 | range_fold_unary_expr (dst_vr, operation, dst_type, src_vr, src_type); | |
1609 | if (dst_vr->varying_p () || dst_vr->undefined_p ()) | |
1610 | return false; | |
1611 | return true; | |
1612 | } | |
1613 | ||
1614 | /* Determine value_range of JFUNC given that INFO describes the caller node or | |
1615 | the one it is inlined to, CS is the call graph edge corresponding to JFUNC | |
1616 | and PARM_TYPE of the parameter. */ | |
1617 | ||
1618 | value_range | |
1619 | ipa_value_range_from_jfunc (ipa_node_params *info, cgraph_edge *cs, | |
1620 | ipa_jump_func *jfunc, tree parm_type) | |
1621 | { | |
1622 | value_range vr; | |
68718e8e JH |
1623 | if (jfunc->m_vr) |
1624 | ipa_vr_operation_and_type_effects (&vr, | |
1625 | jfunc->m_vr, | |
1626 | NOP_EXPR, parm_type, | |
1627 | jfunc->m_vr->type ()); | |
1628 | if (vr.singleton_p ()) | |
1629 | return vr; | |
1630 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
1631 | { | |
1632 | int idx; | |
1633 | ipcp_transformation *sum | |
1634 | = ipcp_get_transformation_summary (cs->caller->inlined_to | |
1635 | ? cs->caller->inlined_to | |
1636 | : cs->caller); | |
1637 | if (!sum || !sum->m_vr) | |
1638 | return vr; | |
1639 | ||
1640 | idx = ipa_get_jf_pass_through_formal_id (jfunc); | |
1641 | ||
1642 | if (!(*sum->m_vr)[idx].known) | |
1643 | return vr; | |
1644 | tree vr_type = ipa_get_type (info, idx); | |
1645 | value_range srcvr (wide_int_to_tree (vr_type, (*sum->m_vr)[idx].min), | |
1646 | wide_int_to_tree (vr_type, (*sum->m_vr)[idx].max), | |
1647 | (*sum->m_vr)[idx].type); | |
1648 | ||
1649 | enum tree_code operation = ipa_get_jf_pass_through_operation (jfunc); | |
1650 | ||
1651 | if (TREE_CODE_CLASS (operation) == tcc_unary) | |
1652 | { | |
1653 | value_range res; | |
1654 | ||
1655 | if (ipa_vr_operation_and_type_effects (&res, | |
1656 | &srcvr, | |
1657 | operation, parm_type, | |
1658 | vr_type)) | |
1659 | vr.intersect (res); | |
1660 | } | |
1661 | else | |
1662 | { | |
1663 | value_range op_res, res; | |
1664 | tree op = ipa_get_jf_pass_through_operand (jfunc); | |
1665 | value_range op_vr (op, op); | |
1666 | ||
1667 | range_fold_binary_expr (&op_res, operation, vr_type, &srcvr, &op_vr); | |
1668 | if (ipa_vr_operation_and_type_effects (&res, | |
1669 | &op_res, | |
1670 | NOP_EXPR, parm_type, | |
1671 | vr_type)) | |
1672 | vr.intersect (res); | |
1673 | } | |
1674 | } | |
1675 | return vr; | |
1676 | } | |
1677 | ||
eb270950 FX |
1678 | /* See if NODE is a clone with a known aggregate value at a given OFFSET of a |
1679 | parameter with the given INDEX. */ | |
1680 | ||
1681 | static tree | |
1682 | get_clone_agg_value (struct cgraph_node *node, HOST_WIDE_INT offset, | |
1683 | int index) | |
1684 | { | |
1685 | struct ipa_agg_replacement_value *aggval; | |
1686 | ||
1687 | aggval = ipa_get_agg_replacements_for_node (node); | |
1688 | while (aggval) | |
1689 | { | |
1690 | if (aggval->offset == offset | |
1691 | && aggval->index == index) | |
1692 | return aggval->value; | |
1693 | aggval = aggval->next; | |
1694 | } | |
1695 | return NULL_TREE; | |
1696 | } | |
1697 | ||
1698 | /* Determine whether ITEM, jump function for an aggregate part, evaluates to a | |
1699 | single known constant value and if so, return it. Otherwise return NULL. | |
1700 | NODE and INFO describes the caller node or the one it is inlined to, and | |
1701 | its related info. */ | |
1702 | ||
1703 | static tree | |
1704 | ipa_agg_value_from_node (class ipa_node_params *info, | |
1705 | struct cgraph_node *node, | |
1706 | struct ipa_agg_jf_item *item) | |
1707 | { | |
1708 | tree value = NULL_TREE; | |
1709 | int src_idx; | |
1710 | ||
1711 | if (item->offset < 0 || item->jftype == IPA_JF_UNKNOWN) | |
1712 | return NULL_TREE; | |
1713 | ||
1714 | if (item->jftype == IPA_JF_CONST) | |
1715 | return item->value.constant; | |
1716 | ||
1717 | gcc_checking_assert (item->jftype == IPA_JF_PASS_THROUGH | |
1718 | || item->jftype == IPA_JF_LOAD_AGG); | |
1719 | ||
1720 | src_idx = item->value.pass_through.formal_id; | |
1721 | ||
1722 | if (info->ipcp_orig_node) | |
1723 | { | |
1724 | if (item->jftype == IPA_JF_PASS_THROUGH) | |
1725 | value = info->known_csts[src_idx]; | |
1726 | else | |
1727 | value = get_clone_agg_value (node, item->value.load_agg.offset, | |
1728 | src_idx); | |
1729 | } | |
1730 | else if (info->lattices) | |
1731 | { | |
1732 | class ipcp_param_lattices *src_plats | |
1733 | = ipa_get_parm_lattices (info, src_idx); | |
1734 | ||
1735 | if (item->jftype == IPA_JF_PASS_THROUGH) | |
1736 | { | |
1737 | struct ipcp_lattice<tree> *lat = &src_plats->itself; | |
1738 | ||
1739 | if (!lat->is_single_const ()) | |
1740 | return NULL_TREE; | |
1741 | ||
1742 | value = lat->values->value; | |
1743 | } | |
1744 | else if (src_plats->aggs | |
1745 | && !src_plats->aggs_bottom | |
1746 | && !src_plats->aggs_contain_variable | |
1747 | && src_plats->aggs_by_ref == item->value.load_agg.by_ref) | |
1748 | { | |
1749 | struct ipcp_agg_lattice *aglat; | |
1750 | ||
1751 | for (aglat = src_plats->aggs; aglat; aglat = aglat->next) | |
1752 | { | |
1753 | if (aglat->offset > item->value.load_agg.offset) | |
1754 | break; | |
1755 | ||
1756 | if (aglat->offset == item->value.load_agg.offset) | |
1757 | { | |
1758 | if (aglat->is_single_const ()) | |
1759 | value = aglat->values->value; | |
1760 | break; | |
1761 | } | |
1762 | } | |
1763 | } | |
1764 | } | |
1765 | ||
1766 | if (!value) | |
1767 | return NULL_TREE; | |
1768 | ||
1769 | if (item->jftype == IPA_JF_LOAD_AGG) | |
1770 | { | |
1771 | tree load_type = item->value.load_agg.type; | |
1772 | tree value_type = TREE_TYPE (value); | |
1773 | ||
1774 | /* Ensure value type is compatible with load type. */ | |
1775 | if (!useless_type_conversion_p (load_type, value_type)) | |
1776 | return NULL_TREE; | |
1777 | } | |
1778 | ||
1779 | return ipa_get_jf_arith_result (item->value.pass_through.operation, | |
1780 | value, | |
1781 | item->value.pass_through.operand, | |
1782 | item->type); | |
1783 | } | |
1784 | ||
1785 | /* Determine whether AGG_JFUNC evaluates to a set of known constant value for | |
1786 | an aggregate and if so, return it. Otherwise return an empty set. NODE | |
1787 | and INFO describes the caller node or the one it is inlined to, and its | |
1788 | related info. */ | |
1789 | ||
1790 | struct ipa_agg_value_set | |
1791 | ipa_agg_value_set_from_jfunc (class ipa_node_params *info, cgraph_node *node, | |
1792 | struct ipa_agg_jump_function *agg_jfunc) | |
1793 | { | |
1794 | struct ipa_agg_value_set agg; | |
1795 | struct ipa_agg_jf_item *item; | |
1796 | int i; | |
1797 | ||
1798 | agg.items = vNULL; | |
1799 | agg.by_ref = agg_jfunc->by_ref; | |
1800 | ||
1801 | FOR_EACH_VEC_SAFE_ELT (agg_jfunc->items, i, item) | |
1802 | { | |
1803 | tree value = ipa_agg_value_from_node (info, node, item); | |
1804 | ||
1805 | if (value) | |
1806 | { | |
1807 | struct ipa_agg_value value_item; | |
1808 | ||
1809 | value_item.offset = item->offset; | |
1810 | value_item.value = value; | |
1811 | ||
1812 | agg.items.safe_push (value_item); | |
1813 | } | |
1814 | } | |
1815 | return agg; | |
1816 | } | |
1817 | ||
310bc633 MJ |
1818 | /* If checking is enabled, verify that no lattice is in the TOP state, i.e. not |
1819 | bottom, not containing a variable component and without any known value at | |
1820 | the same time. */ | |
3949c4a7 | 1821 | |
310bc633 MJ |
1822 | DEBUG_FUNCTION void |
1823 | ipcp_verify_propagated_values (void) | |
518dc859 | 1824 | { |
310bc633 | 1825 | struct cgraph_node *node; |
ca30a539 | 1826 | |
310bc633 | 1827 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) |
518dc859 | 1828 | { |
a4a3cdd0 | 1829 | ipa_node_params *info = ipa_node_params_sum->get (node); |
e72763e2 JH |
1830 | if (!opt_for_fn (node->decl, flag_ipa_cp) |
1831 | || !opt_for_fn (node->decl, optimize)) | |
6cf67b62 | 1832 | continue; |
310bc633 | 1833 | int i, count = ipa_get_param_count (info); |
c43f07af | 1834 | |
310bc633 | 1835 | for (i = 0; i < count; i++) |
518dc859 | 1836 | { |
c0cb5055 | 1837 | ipcp_lattice<tree> *lat = ipa_get_scalar_lat (info, i); |
c43f07af | 1838 | |
310bc633 MJ |
1839 | if (!lat->bottom |
1840 | && !lat->contains_variable | |
1841 | && lat->values_count == 0) | |
518dc859 | 1842 | { |
310bc633 | 1843 | if (dump_file) |
518dc859 | 1844 | { |
6c52831d | 1845 | symtab->dump (dump_file); |
310bc633 | 1846 | fprintf (dump_file, "\nIPA lattices after constant " |
5bed50e8 | 1847 | "propagation, before gcc_unreachable:\n"); |
310bc633 | 1848 | print_all_lattices (dump_file, true, false); |
518dc859 | 1849 | } |
3949c4a7 | 1850 | |
310bc633 | 1851 | gcc_unreachable (); |
518dc859 RL |
1852 | } |
1853 | } | |
1854 | } | |
1855 | } | |
1856 | ||
44210a96 MJ |
1857 | /* Return true iff X and Y should be considered equal contexts by IPA-CP. */ |
1858 | ||
1859 | static bool | |
1860 | values_equal_for_ipcp_p (ipa_polymorphic_call_context x, | |
1861 | ipa_polymorphic_call_context y) | |
1862 | { | |
1863 | return x.equal_to (y); | |
1864 | } | |
1865 | ||
1866 | ||
c0cb5055 MJ |
1867 | /* Add a new value source to the value represented by THIS, marking that a |
1868 | value comes from edge CS and (if the underlying jump function is a | |
1869 | pass-through or an ancestor one) from a caller value SRC_VAL of a caller | |
1870 | parameter described by SRC_INDEX. OFFSET is negative if the source was the | |
1871 | scalar value of the parameter itself or the offset within an aggregate. */ | |
310bc633 | 1872 | |
c0cb5055 MJ |
1873 | template <typename valtype> |
1874 | void | |
1875 | ipcp_value<valtype>::add_source (cgraph_edge *cs, ipcp_value *src_val, | |
1876 | int src_idx, HOST_WIDE_INT offset) | |
518dc859 | 1877 | { |
c0cb5055 | 1878 | ipcp_value_source<valtype> *src; |
ca30a539 | 1879 | |
2651e637 | 1880 | src = new (ipcp_sources_pool.allocate ()) ipcp_value_source<valtype>; |
2c9561b5 | 1881 | src->offset = offset; |
310bc633 MJ |
1882 | src->cs = cs; |
1883 | src->val = src_val; | |
1884 | src->index = src_idx; | |
fb3f88cc | 1885 | |
c0cb5055 MJ |
1886 | src->next = sources; |
1887 | sources = src; | |
310bc633 MJ |
1888 | } |
1889 | ||
c0cb5055 MJ |
1890 | /* Allocate a new ipcp_value holding a tree constant, initialize its value to |
1891 | SOURCE and clear all other fields. */ | |
310bc633 | 1892 | |
c0cb5055 | 1893 | static ipcp_value<tree> * |
ff2b92de | 1894 | allocate_and_init_ipcp_value (tree cst, unsigned same_lat_gen_level) |
310bc633 | 1895 | { |
c0cb5055 | 1896 | ipcp_value<tree> *val; |
310bc633 | 1897 | |
c3684b7b | 1898 | val = new (ipcp_cst_values_pool.allocate ()) ipcp_value<tree>(); |
ff2b92de MJ |
1899 | val->value = cst; |
1900 | val->self_recursion_generated_level = same_lat_gen_level; | |
44210a96 MJ |
1901 | return val; |
1902 | } | |
1903 | ||
1904 | /* Allocate a new ipcp_value holding a polymorphic context, initialize its | |
1905 | value to SOURCE and clear all other fields. */ | |
1906 | ||
1907 | static ipcp_value<ipa_polymorphic_call_context> * | |
ff2b92de MJ |
1908 | allocate_and_init_ipcp_value (ipa_polymorphic_call_context ctx, |
1909 | unsigned same_lat_gen_level) | |
44210a96 MJ |
1910 | { |
1911 | ipcp_value<ipa_polymorphic_call_context> *val; | |
1912 | ||
c3684b7b MS |
1913 | val = new (ipcp_poly_ctx_values_pool.allocate ()) |
1914 | ipcp_value<ipa_polymorphic_call_context>(); | |
ff2b92de MJ |
1915 | val->value = ctx; |
1916 | val->self_recursion_generated_level = same_lat_gen_level; | |
c0cb5055 MJ |
1917 | return val; |
1918 | } | |
1919 | ||
1920 | /* Try to add NEWVAL to LAT, potentially creating a new ipcp_value for it. CS, | |
1921 | SRC_VAL SRC_INDEX and OFFSET are meant for add_source and have the same | |
1922 | meaning. OFFSET -1 means the source is scalar and not a part of an | |
9b14fc33 | 1923 | aggregate. If non-NULL, VAL_P records address of existing or newly added |
ff2b92de MJ |
1924 | ipcp_value. |
1925 | ||
1926 | If the value is generated for a self-recursive call as a result of an | |
1927 | arithmetic pass-through jump-function acting on a value in the same lattice, | |
1928 | SAME_LAT_GEN_LEVEL must be the length of such chain, otherwise it must be | |
1929 | zero. If it is non-zero, PARAM_IPA_CP_VALUE_LIST_SIZE limit is ignored. */ | |
c0cb5055 MJ |
1930 | |
1931 | template <typename valtype> | |
1932 | bool | |
1933 | ipcp_lattice<valtype>::add_value (valtype newval, cgraph_edge *cs, | |
1934 | ipcp_value<valtype> *src_val, | |
9b14fc33 FX |
1935 | int src_idx, HOST_WIDE_INT offset, |
1936 | ipcp_value<valtype> **val_p, | |
ff2b92de | 1937 | unsigned same_lat_gen_level) |
c0cb5055 | 1938 | { |
9b14fc33 FX |
1939 | ipcp_value<valtype> *val, *last_val = NULL; |
1940 | ||
1941 | if (val_p) | |
1942 | *val_p = NULL; | |
c0cb5055 MJ |
1943 | |
1944 | if (bottom) | |
310bc633 MJ |
1945 | return false; |
1946 | ||
9b14fc33 | 1947 | for (val = values; val; last_val = val, val = val->next) |
310bc633 MJ |
1948 | if (values_equal_for_ipcp_p (val->value, newval)) |
1949 | { | |
9b14fc33 FX |
1950 | if (val_p) |
1951 | *val_p = val; | |
1952 | ||
ff2b92de MJ |
1953 | if (val->self_recursion_generated_level < same_lat_gen_level) |
1954 | val->self_recursion_generated_level = same_lat_gen_level; | |
1955 | ||
4cb13597 | 1956 | if (ipa_edge_within_scc (cs)) |
310bc633 | 1957 | { |
c0cb5055 | 1958 | ipcp_value_source<valtype> *s; |
155c9907 | 1959 | for (s = val->sources; s; s = s->next) |
a0f6a8cb | 1960 | if (s->cs == cs && s->val == src_val) |
310bc633 MJ |
1961 | break; |
1962 | if (s) | |
1963 | return false; | |
1964 | } | |
1965 | ||
c0cb5055 | 1966 | val->add_source (cs, src_val, src_idx, offset); |
310bc633 MJ |
1967 | return false; |
1968 | } | |
1969 | ||
ff2b92de | 1970 | if (!same_lat_gen_level && values_count == opt_for_fn (cs->caller->decl, |
fdfd7f53 | 1971 | param_ipa_cp_value_list_size)) |
310bc633 MJ |
1972 | { |
1973 | /* We can only free sources, not the values themselves, because sources | |
026c3cfd | 1974 | of other values in this SCC might point to them. */ |
c0cb5055 | 1975 | for (val = values; val; val = val->next) |
310bc633 MJ |
1976 | { |
1977 | while (val->sources) | |
1978 | { | |
c0cb5055 | 1979 | ipcp_value_source<valtype> *src = val->sources; |
310bc633 | 1980 | val->sources = src->next; |
2651e637 | 1981 | ipcp_sources_pool.remove ((ipcp_value_source<tree>*)src); |
310bc633 MJ |
1982 | } |
1983 | } | |
c0cb5055 MJ |
1984 | values = NULL; |
1985 | return set_to_bottom (); | |
310bc633 MJ |
1986 | } |
1987 | ||
c0cb5055 | 1988 | values_count++; |
ff2b92de | 1989 | val = allocate_and_init_ipcp_value (newval, same_lat_gen_level); |
c0cb5055 | 1990 | val->add_source (cs, src_val, src_idx, offset); |
9b14fc33 FX |
1991 | val->next = NULL; |
1992 | ||
1993 | /* Add the new value to end of value list, which can reduce iterations | |
1994 | of propagation stage for recursive function. */ | |
1995 | if (last_val) | |
1996 | last_val->next = val; | |
1997 | else | |
1998 | values = val; | |
1999 | ||
2000 | if (val_p) | |
2001 | *val_p = val; | |
2002 | ||
2003 | return true; | |
2004 | } | |
2005 | ||
9b14fc33 FX |
2006 | /* A helper function that returns result of operation specified by OPCODE on |
2007 | the value of SRC_VAL. If non-NULL, OPND1_TYPE is expected type for the | |
2008 | value of SRC_VAL. If the operation is binary, OPND2 is a constant value | |
2009 | acting as its second operand. If non-NULL, RES_TYPE is expected type of | |
2010 | the result. */ | |
2011 | ||
2012 | static tree | |
2013 | get_val_across_arith_op (enum tree_code opcode, | |
2014 | tree opnd1_type, | |
2015 | tree opnd2, | |
2016 | ipcp_value<tree> *src_val, | |
2017 | tree res_type) | |
2018 | { | |
2019 | tree opnd1 = src_val->value; | |
2020 | ||
2021 | /* Skip source values that is incompatible with specified type. */ | |
2022 | if (opnd1_type | |
2023 | && !useless_type_conversion_p (opnd1_type, TREE_TYPE (opnd1))) | |
2024 | return NULL_TREE; | |
2025 | ||
2026 | return ipa_get_jf_arith_result (opcode, opnd1, opnd2, res_type); | |
2027 | } | |
2028 | ||
eb270950 FX |
2029 | /* Propagate values through an arithmetic transformation described by a jump |
2030 | function associated with edge CS, taking values from SRC_LAT and putting | |
2031 | them into DEST_LAT. OPND1_TYPE is expected type for the values in SRC_LAT. | |
2032 | OPND2 is a constant value if transformation is a binary operation. | |
2033 | SRC_OFFSET specifies offset in an aggregate if SRC_LAT describes lattice of | |
2034 | a part of the aggregate. SRC_IDX is the index of the source parameter. | |
2035 | RES_TYPE is the value type of result being propagated into. Return true if | |
2036 | DEST_LAT changed. */ | |
310bc633 MJ |
2037 | |
2038 | static bool | |
eb270950 FX |
2039 | propagate_vals_across_arith_jfunc (cgraph_edge *cs, |
2040 | enum tree_code opcode, | |
2041 | tree opnd1_type, | |
2042 | tree opnd2, | |
2043 | ipcp_lattice<tree> *src_lat, | |
2044 | ipcp_lattice<tree> *dest_lat, | |
2045 | HOST_WIDE_INT src_offset, | |
2046 | int src_idx, | |
2047 | tree res_type) | |
310bc633 | 2048 | { |
c0cb5055 | 2049 | ipcp_value<tree> *src_val; |
310bc633 MJ |
2050 | bool ret = false; |
2051 | ||
9b14fc33 FX |
2052 | /* Due to circular dependencies, propagating within an SCC through arithmetic |
2053 | transformation would create infinite number of values. But for | |
2054 | self-feeding recursive function, we could allow propagation in a limited | |
2055 | count, and this can enable a simple kind of recursive function versioning. | |
2056 | For other scenario, we would just make lattices bottom. */ | |
eb270950 | 2057 | if (opcode != NOP_EXPR && ipa_edge_within_scc (cs)) |
9b14fc33 FX |
2058 | { |
2059 | int i; | |
2060 | ||
fdfd7f53 ML |
2061 | int max_recursive_depth = opt_for_fn(cs->caller->decl, |
2062 | param_ipa_cp_max_recursive_depth); | |
2063 | if (src_lat != dest_lat || max_recursive_depth < 1) | |
9b14fc33 FX |
2064 | return dest_lat->set_contains_variable (); |
2065 | ||
2066 | /* No benefit if recursive execution is in low probability. */ | |
2067 | if (cs->sreal_frequency () * 100 | |
fdfd7f53 ML |
2068 | <= ((sreal) 1) * opt_for_fn (cs->caller->decl, |
2069 | param_ipa_cp_min_recursive_probability)) | |
9b14fc33 FX |
2070 | return dest_lat->set_contains_variable (); |
2071 | ||
2072 | auto_vec<ipcp_value<tree> *, 8> val_seeds; | |
2073 | ||
2074 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
2075 | { | |
2076 | /* Now we do not use self-recursively generated value as propagation | |
2077 | source, this is absolutely conservative, but could avoid explosion | |
2078 | of lattice's value space, especially when one recursive function | |
2079 | calls another recursive. */ | |
ff2b92de | 2080 | if (src_val->self_recursion_generated_p ()) |
9b14fc33 FX |
2081 | { |
2082 | ipcp_value_source<tree> *s; | |
2083 | ||
2084 | /* If the lattice has already been propagated for the call site, | |
2085 | no need to do that again. */ | |
2086 | for (s = src_val->sources; s; s = s->next) | |
2087 | if (s->cs == cs) | |
2088 | return dest_lat->set_contains_variable (); | |
2089 | } | |
2090 | else | |
2091 | val_seeds.safe_push (src_val); | |
2092 | } | |
2093 | ||
42d73fa9 FX |
2094 | gcc_assert ((int) val_seeds.length () <= param_ipa_cp_value_list_size); |
2095 | ||
9b14fc33 FX |
2096 | /* Recursively generate lattice values with a limited count. */ |
2097 | FOR_EACH_VEC_ELT (val_seeds, i, src_val) | |
2098 | { | |
fdfd7f53 | 2099 | for (int j = 1; j < max_recursive_depth; j++) |
9b14fc33 FX |
2100 | { |
2101 | tree cstval = get_val_across_arith_op (opcode, opnd1_type, opnd2, | |
2102 | src_val, res_type); | |
f225c6b0 MJ |
2103 | if (!cstval |
2104 | || !ipacp_value_safe_for_type (res_type, cstval)) | |
9b14fc33 FX |
2105 | break; |
2106 | ||
2107 | ret |= dest_lat->add_value (cstval, cs, src_val, src_idx, | |
ff2b92de | 2108 | src_offset, &src_val, j); |
9b14fc33 FX |
2109 | gcc_checking_assert (src_val); |
2110 | } | |
2111 | } | |
2112 | ret |= dest_lat->set_contains_variable (); | |
2113 | } | |
310bc633 MJ |
2114 | else |
2115 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
0818c24c | 2116 | { |
9b14fc33 FX |
2117 | /* Now we do not use self-recursively generated value as propagation |
2118 | source, otherwise it is easy to make value space of normal lattice | |
2119 | overflow. */ | |
ff2b92de | 2120 | if (src_val->self_recursion_generated_p ()) |
9b14fc33 FX |
2121 | { |
2122 | ret |= dest_lat->set_contains_variable (); | |
2123 | continue; | |
2124 | } | |
310bc633 | 2125 | |
9b14fc33 FX |
2126 | tree cstval = get_val_across_arith_op (opcode, opnd1_type, opnd2, |
2127 | src_val, res_type); | |
f225c6b0 MJ |
2128 | if (cstval |
2129 | && ipacp_value_safe_for_type (res_type, cstval)) | |
eb270950 FX |
2130 | ret |= dest_lat->add_value (cstval, cs, src_val, src_idx, |
2131 | src_offset); | |
310bc633 | 2132 | else |
c0cb5055 | 2133 | ret |= dest_lat->set_contains_variable (); |
0818c24c | 2134 | } |
310bc633 MJ |
2135 | |
2136 | return ret; | |
2137 | } | |
2138 | ||
eb270950 FX |
2139 | /* Propagate values through a pass-through jump function JFUNC associated with |
2140 | edge CS, taking values from SRC_LAT and putting them into DEST_LAT. SRC_IDX | |
2141 | is the index of the source parameter. PARM_TYPE is the type of the | |
2142 | parameter to which the result is passed. */ | |
2143 | ||
2144 | static bool | |
2145 | propagate_vals_across_pass_through (cgraph_edge *cs, ipa_jump_func *jfunc, | |
2146 | ipcp_lattice<tree> *src_lat, | |
2147 | ipcp_lattice<tree> *dest_lat, int src_idx, | |
2148 | tree parm_type) | |
2149 | { | |
2150 | return propagate_vals_across_arith_jfunc (cs, | |
2151 | ipa_get_jf_pass_through_operation (jfunc), | |
2152 | NULL_TREE, | |
2153 | ipa_get_jf_pass_through_operand (jfunc), | |
2154 | src_lat, dest_lat, -1, src_idx, parm_type); | |
2155 | } | |
2156 | ||
310bc633 MJ |
2157 | /* Propagate values through an ancestor jump function JFUNC associated with |
2158 | edge CS, taking values from SRC_LAT and putting them into DEST_LAT. SRC_IDX | |
2159 | is the index of the source parameter. */ | |
2160 | ||
2161 | static bool | |
155c9907 JJ |
2162 | propagate_vals_across_ancestor (struct cgraph_edge *cs, |
2163 | struct ipa_jump_func *jfunc, | |
2164 | ipcp_lattice<tree> *src_lat, | |
f225c6b0 MJ |
2165 | ipcp_lattice<tree> *dest_lat, int src_idx, |
2166 | tree param_type) | |
310bc633 | 2167 | { |
c0cb5055 | 2168 | ipcp_value<tree> *src_val; |
310bc633 MJ |
2169 | bool ret = false; |
2170 | ||
4cb13597 | 2171 | if (ipa_edge_within_scc (cs)) |
c0cb5055 | 2172 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2173 | |
2174 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
2175 | { | |
7b872d9e | 2176 | tree t = ipa_get_jf_ancestor_result (jfunc, src_val->value); |
310bc633 | 2177 | |
f225c6b0 | 2178 | if (t && ipacp_value_safe_for_type (param_type, t)) |
c0cb5055 | 2179 | ret |= dest_lat->add_value (t, cs, src_val, src_idx); |
310bc633 | 2180 | else |
c0cb5055 | 2181 | ret |= dest_lat->set_contains_variable (); |
310bc633 MJ |
2182 | } |
2183 | ||
2184 | return ret; | |
2185 | } | |
2186 | ||
2c9561b5 | 2187 | /* Propagate scalar values across jump function JFUNC that is associated with |
e5cf5e11 PK |
2188 | edge CS and put the values into DEST_LAT. PARM_TYPE is the type of the |
2189 | parameter to which the result is passed. */ | |
310bc633 MJ |
2190 | |
2191 | static bool | |
155c9907 JJ |
2192 | propagate_scalar_across_jump_function (struct cgraph_edge *cs, |
2193 | struct ipa_jump_func *jfunc, | |
e5cf5e11 PK |
2194 | ipcp_lattice<tree> *dest_lat, |
2195 | tree param_type) | |
310bc633 MJ |
2196 | { |
2197 | if (dest_lat->bottom) | |
2198 | return false; | |
2199 | ||
44210a96 | 2200 | if (jfunc->type == IPA_JF_CONST) |
310bc633 | 2201 | { |
44210a96 | 2202 | tree val = ipa_get_jf_constant (jfunc); |
f225c6b0 MJ |
2203 | if (ipacp_value_safe_for_type (param_type, val)) |
2204 | return dest_lat->add_value (val, cs, NULL, 0); | |
2205 | else | |
2206 | return dest_lat->set_contains_variable (); | |
310bc633 MJ |
2207 | } |
2208 | else if (jfunc->type == IPA_JF_PASS_THROUGH | |
2209 | || jfunc->type == IPA_JF_ANCESTOR) | |
2210 | { | |
a4a3cdd0 | 2211 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
c0cb5055 | 2212 | ipcp_lattice<tree> *src_lat; |
310bc633 MJ |
2213 | int src_idx; |
2214 | bool ret; | |
2215 | ||
2216 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
7b872d9e | 2217 | src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
310bc633 | 2218 | else |
7b872d9e | 2219 | src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
310bc633 | 2220 | |
2c9561b5 | 2221 | src_lat = ipa_get_scalar_lat (caller_info, src_idx); |
310bc633 | 2222 | if (src_lat->bottom) |
c0cb5055 | 2223 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2224 | |
2225 | /* If we would need to clone the caller and cannot, do not propagate. */ | |
2226 | if (!ipcp_versionable_function_p (cs->caller) | |
2227 | && (src_lat->contains_variable | |
2228 | || (src_lat->values_count > 1))) | |
c0cb5055 | 2229 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2230 | |
2231 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
155c9907 | 2232 | ret = propagate_vals_across_pass_through (cs, jfunc, src_lat, |
f225c6b0 MJ |
2233 | dest_lat, src_idx, |
2234 | param_type); | |
310bc633 | 2235 | else |
155c9907 | 2236 | ret = propagate_vals_across_ancestor (cs, jfunc, src_lat, dest_lat, |
f225c6b0 | 2237 | src_idx, param_type); |
310bc633 MJ |
2238 | |
2239 | if (src_lat->contains_variable) | |
c0cb5055 | 2240 | ret |= dest_lat->set_contains_variable (); |
310bc633 MJ |
2241 | |
2242 | return ret; | |
2243 | } | |
2244 | ||
2245 | /* TODO: We currently do not handle member method pointers in IPA-CP (we only | |
2246 | use it for indirect inlining), we should propagate them too. */ | |
c0cb5055 | 2247 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2248 | } |
2249 | ||
44210a96 MJ |
2250 | /* Propagate scalar values across jump function JFUNC that is associated with |
2251 | edge CS and describes argument IDX and put the values into DEST_LAT. */ | |
2252 | ||
2253 | static bool | |
155c9907 | 2254 | propagate_context_across_jump_function (cgraph_edge *cs, |
44210a96 MJ |
2255 | ipa_jump_func *jfunc, int idx, |
2256 | ipcp_lattice<ipa_polymorphic_call_context> *dest_lat) | |
2257 | { | |
44210a96 MJ |
2258 | if (dest_lat->bottom) |
2259 | return false; | |
a4a3cdd0 | 2260 | ipa_edge_args *args = ipa_edge_args_sum->get (cs); |
44210a96 MJ |
2261 | bool ret = false; |
2262 | bool added_sth = false; | |
df0d8136 | 2263 | bool type_preserved = true; |
44210a96 MJ |
2264 | |
2265 | ipa_polymorphic_call_context edge_ctx, *edge_ctx_ptr | |
2266 | = ipa_get_ith_polymorhic_call_context (args, idx); | |
2267 | ||
2268 | if (edge_ctx_ptr) | |
df0d8136 | 2269 | edge_ctx = *edge_ctx_ptr; |
44210a96 MJ |
2270 | |
2271 | if (jfunc->type == IPA_JF_PASS_THROUGH | |
2272 | || jfunc->type == IPA_JF_ANCESTOR) | |
2273 | { | |
a4a3cdd0 | 2274 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
44210a96 MJ |
2275 | int src_idx; |
2276 | ipcp_lattice<ipa_polymorphic_call_context> *src_lat; | |
2277 | ||
2278 | /* TODO: Once we figure out how to propagate speculations, it will | |
2279 | probably be a good idea to switch to speculation if type_preserved is | |
2280 | not set instead of punting. */ | |
2281 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
2282 | { | |
df0d8136 | 2283 | if (ipa_get_jf_pass_through_operation (jfunc) != NOP_EXPR) |
44210a96 | 2284 | goto prop_fail; |
df0d8136 | 2285 | type_preserved = ipa_get_jf_pass_through_type_preserved (jfunc); |
44210a96 MJ |
2286 | src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
2287 | } | |
2288 | else | |
2289 | { | |
df0d8136 | 2290 | type_preserved = ipa_get_jf_ancestor_type_preserved (jfunc); |
44210a96 MJ |
2291 | src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
2292 | } | |
2293 | ||
2294 | src_lat = ipa_get_poly_ctx_lat (caller_info, src_idx); | |
2295 | /* If we would need to clone the caller and cannot, do not propagate. */ | |
2296 | if (!ipcp_versionable_function_p (cs->caller) | |
2297 | && (src_lat->contains_variable | |
2298 | || (src_lat->values_count > 1))) | |
2299 | goto prop_fail; | |
44210a96 MJ |
2300 | |
2301 | ipcp_value<ipa_polymorphic_call_context> *src_val; | |
2302 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
2303 | { | |
2304 | ipa_polymorphic_call_context cur = src_val->value; | |
df0d8136 JH |
2305 | |
2306 | if (!type_preserved) | |
2307 | cur.possible_dynamic_type_change (cs->in_polymorphic_cdtor); | |
44210a96 MJ |
2308 | if (jfunc->type == IPA_JF_ANCESTOR) |
2309 | cur.offset_by (ipa_get_jf_ancestor_offset (jfunc)); | |
df0d8136 JH |
2310 | /* TODO: In cases we know how the context is going to be used, |
2311 | we can improve the result by passing proper OTR_TYPE. */ | |
2312 | cur.combine_with (edge_ctx); | |
44210a96 MJ |
2313 | if (!cur.useless_p ()) |
2314 | { | |
df0d8136 JH |
2315 | if (src_lat->contains_variable |
2316 | && !edge_ctx.equal_to (cur)) | |
2317 | ret |= dest_lat->set_contains_variable (); | |
44210a96 MJ |
2318 | ret |= dest_lat->add_value (cur, cs, src_val, src_idx); |
2319 | added_sth = true; | |
2320 | } | |
2321 | } | |
44210a96 MJ |
2322 | } |
2323 | ||
2324 | prop_fail: | |
2325 | if (!added_sth) | |
2326 | { | |
2327 | if (!edge_ctx.useless_p ()) | |
2328 | ret |= dest_lat->add_value (edge_ctx, cs); | |
2329 | else | |
2330 | ret |= dest_lat->set_contains_variable (); | |
2331 | } | |
2332 | ||
2333 | return ret; | |
2334 | } | |
2335 | ||
209ca542 PK |
2336 | /* Propagate bits across jfunc that is associated with |
2337 | edge cs and update dest_lattice accordingly. */ | |
2338 | ||
2339 | bool | |
155c9907 JJ |
2340 | propagate_bits_across_jump_function (cgraph_edge *cs, int idx, |
2341 | ipa_jump_func *jfunc, | |
2342 | ipcp_bits_lattice *dest_lattice) | |
209ca542 PK |
2343 | { |
2344 | if (dest_lattice->bottom_p ()) | |
2345 | return false; | |
2346 | ||
2347 | enum availability availability; | |
2348 | cgraph_node *callee = cs->callee->function_symbol (&availability); | |
a4a3cdd0 | 2349 | ipa_node_params *callee_info = ipa_node_params_sum->get (callee); |
209ca542 PK |
2350 | tree parm_type = ipa_get_type (callee_info, idx); |
2351 | ||
b93f25ad ML |
2352 | /* For K&R C programs, ipa_get_type() could return NULL_TREE. Avoid the |
2353 | transform for these cases. Similarly, we can have bad type mismatches | |
2354 | with LTO, avoid doing anything with those too. */ | |
2355 | if (!parm_type | |
2356 | || (!INTEGRAL_TYPE_P (parm_type) && !POINTER_TYPE_P (parm_type))) | |
209ca542 PK |
2357 | { |
2358 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
b93f25ad ML |
2359 | fprintf (dump_file, "Setting dest_lattice to bottom, because type of " |
2360 | "param %i of %s is NULL or unsuitable for bits propagation\n", | |
3629ff8a | 2361 | idx, cs->callee->dump_name ()); |
209ca542 PK |
2362 | |
2363 | return dest_lattice->set_to_bottom (); | |
2364 | } | |
2365 | ||
2366 | unsigned precision = TYPE_PRECISION (parm_type); | |
2367 | signop sgn = TYPE_SIGN (parm_type); | |
2368 | ||
67b97478 PK |
2369 | if (jfunc->type == IPA_JF_PASS_THROUGH |
2370 | || jfunc->type == IPA_JF_ANCESTOR) | |
209ca542 | 2371 | { |
a4a3cdd0 | 2372 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
209ca542 | 2373 | tree operand = NULL_TREE; |
67b97478 PK |
2374 | enum tree_code code; |
2375 | unsigned src_idx; | |
209ca542 | 2376 | |
67b97478 PK |
2377 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
2378 | { | |
2379 | code = ipa_get_jf_pass_through_operation (jfunc); | |
2380 | src_idx = ipa_get_jf_pass_through_formal_id (jfunc); | |
2381 | if (code != NOP_EXPR) | |
2382 | operand = ipa_get_jf_pass_through_operand (jfunc); | |
2383 | } | |
2384 | else | |
2385 | { | |
155c9907 | 2386 | code = POINTER_PLUS_EXPR; |
67b97478 PK |
2387 | src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
2388 | unsigned HOST_WIDE_INT offset = ipa_get_jf_ancestor_offset (jfunc) / BITS_PER_UNIT; | |
2389 | operand = build_int_cstu (size_type_node, offset); | |
2390 | } | |
209ca542 | 2391 | |
99b1c316 | 2392 | class ipcp_param_lattices *src_lats |
209ca542 PK |
2393 | = ipa_get_parm_lattices (caller_info, src_idx); |
2394 | ||
2395 | /* Try to propagate bits if src_lattice is bottom, but jfunc is known. | |
2396 | for eg consider: | |
2397 | int f(int x) | |
2398 | { | |
2399 | g (x & 0xff); | |
2400 | } | |
2401 | Assume lattice for x is bottom, however we can still propagate | |
2402 | result of x & 0xff == 0xff, which gets computed during ccp1 pass | |
2403 | and we store it in jump function during analysis stage. */ | |
2404 | ||
2405 | if (src_lats->bits_lattice.bottom_p () | |
86cd0334 MJ |
2406 | && jfunc->bits) |
2407 | return dest_lattice->meet_with (jfunc->bits->value, jfunc->bits->mask, | |
209ca542 PK |
2408 | precision); |
2409 | else | |
2410 | return dest_lattice->meet_with (src_lats->bits_lattice, precision, sgn, | |
2411 | code, operand); | |
2412 | } | |
2413 | ||
2414 | else if (jfunc->type == IPA_JF_ANCESTOR) | |
2415 | return dest_lattice->set_to_bottom (); | |
86cd0334 MJ |
2416 | else if (jfunc->bits) |
2417 | return dest_lattice->meet_with (jfunc->bits->value, jfunc->bits->mask, | |
2418 | precision); | |
209ca542 PK |
2419 | else |
2420 | return dest_lattice->set_to_bottom (); | |
2421 | } | |
2422 | ||
8bc5448f | 2423 | /* Propagate value range across jump function JFUNC that is associated with |
5d5f1e95 KV |
2424 | edge CS with param of callee of PARAM_TYPE and update DEST_PLATS |
2425 | accordingly. */ | |
8bc5448f KV |
2426 | |
2427 | static bool | |
155c9907 | 2428 | propagate_vr_across_jump_function (cgraph_edge *cs, ipa_jump_func *jfunc, |
99b1c316 | 2429 | class ipcp_param_lattices *dest_plats, |
155c9907 | 2430 | tree param_type) |
8bc5448f | 2431 | { |
8bc5448f KV |
2432 | ipcp_vr_lattice *dest_lat = &dest_plats->m_value_range; |
2433 | ||
2434 | if (dest_lat->bottom_p ()) | |
2435 | return false; | |
2436 | ||
5d5f1e95 KV |
2437 | if (!param_type |
2438 | || (!INTEGRAL_TYPE_P (param_type) | |
2439 | && !POINTER_TYPE_P (param_type))) | |
2440 | return dest_lat->set_to_bottom (); | |
2441 | ||
8bc5448f KV |
2442 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
2443 | { | |
a5e14a42 | 2444 | enum tree_code operation = ipa_get_jf_pass_through_operation (jfunc); |
a4a3cdd0 | 2445 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
2b89b748 JH |
2446 | int src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
2447 | class ipcp_param_lattices *src_lats | |
2448 | = ipa_get_parm_lattices (caller_info, src_idx); | |
2449 | tree operand_type = ipa_get_type (caller_info, src_idx); | |
8bc5448f | 2450 | |
2b89b748 JH |
2451 | if (src_lats->m_value_range.bottom_p ()) |
2452 | return dest_lat->set_to_bottom (); | |
2453 | ||
2454 | value_range vr; | |
a5e14a42 | 2455 | if (TREE_CODE_CLASS (operation) == tcc_unary) |
27f418b8 JJ |
2456 | ipa_vr_operation_and_type_effects (&vr, |
2457 | &src_lats->m_value_range.m_vr, | |
2458 | operation, param_type, | |
2459 | operand_type); | |
2b89b748 JH |
2460 | /* A crude way to prevent unbounded number of value range updates |
2461 | in SCC components. We should allow limited number of updates within | |
2462 | SCC, too. */ | |
2463 | else if (!ipa_edge_within_scc (cs)) | |
2464 | { | |
2465 | tree op = ipa_get_jf_pass_through_operand (jfunc); | |
2466 | value_range op_vr (op, op); | |
2467 | value_range op_res,res; | |
2468 | ||
2469 | range_fold_binary_expr (&op_res, operation, operand_type, | |
2470 | &src_lats->m_value_range.m_vr, &op_vr); | |
2471 | ipa_vr_operation_and_type_effects (&vr, | |
2472 | &op_res, | |
2473 | NOP_EXPR, param_type, | |
2474 | operand_type); | |
2475 | } | |
2476 | if (!vr.undefined_p () && !vr.varying_p ()) | |
2477 | { | |
2478 | if (jfunc->m_vr) | |
2479 | { | |
2480 | value_range jvr; | |
2481 | if (ipa_vr_operation_and_type_effects (&jvr, jfunc->m_vr, | |
2482 | NOP_EXPR, | |
2483 | param_type, | |
2484 | jfunc->m_vr->type ())) | |
27f418b8 | 2485 | vr.intersect (jvr); |
2b89b748 JH |
2486 | } |
2487 | return dest_lat->meet_with (&vr); | |
a2b4c188 | 2488 | } |
8bc5448f KV |
2489 | } |
2490 | else if (jfunc->type == IPA_JF_CONST) | |
2491 | { | |
2492 | tree val = ipa_get_jf_constant (jfunc); | |
2493 | if (TREE_CODE (val) == INTEGER_CST) | |
2494 | { | |
7d22d5a3 | 2495 | val = fold_convert (param_type, val); |
1e401340 KV |
2496 | if (TREE_OVERFLOW_P (val)) |
2497 | val = drop_tree_overflow (val); | |
86cd0334 | 2498 | |
5d462877 | 2499 | value_range tmpvr (val, val); |
86cd0334 | 2500 | return dest_lat->meet_with (&tmpvr); |
8bc5448f KV |
2501 | } |
2502 | } | |
2503 | ||
028d81b1 | 2504 | value_range vr; |
86cd0334 MJ |
2505 | if (jfunc->m_vr |
2506 | && ipa_vr_operation_and_type_effects (&vr, jfunc->m_vr, NOP_EXPR, | |
a5e14a42 | 2507 | param_type, |
54994253 | 2508 | jfunc->m_vr->type ())) |
a5e14a42 | 2509 | return dest_lat->meet_with (&vr); |
8bc5448f KV |
2510 | else |
2511 | return dest_lat->set_to_bottom (); | |
2512 | } | |
2513 | ||
2c9561b5 MJ |
2514 | /* If DEST_PLATS already has aggregate items, check that aggs_by_ref matches |
2515 | NEW_AGGS_BY_REF and if not, mark all aggs as bottoms and return true (in all | |
2516 | other cases, return false). If there are no aggregate items, set | |
2517 | aggs_by_ref to NEW_AGGS_BY_REF. */ | |
2518 | ||
2519 | static bool | |
99b1c316 | 2520 | set_check_aggs_by_ref (class ipcp_param_lattices *dest_plats, |
2c9561b5 MJ |
2521 | bool new_aggs_by_ref) |
2522 | { | |
2523 | if (dest_plats->aggs) | |
2524 | { | |
2525 | if (dest_plats->aggs_by_ref != new_aggs_by_ref) | |
2526 | { | |
2527 | set_agg_lats_to_bottom (dest_plats); | |
2528 | return true; | |
2529 | } | |
2530 | } | |
2531 | else | |
2532 | dest_plats->aggs_by_ref = new_aggs_by_ref; | |
2533 | return false; | |
2534 | } | |
2535 | ||
2536 | /* Walk aggregate lattices in DEST_PLATS from ***AGLAT on, until ***aglat is an | |
2537 | already existing lattice for the given OFFSET and SIZE, marking all skipped | |
2538 | lattices as containing variable and checking for overlaps. If there is no | |
2539 | already existing lattice for the OFFSET and VAL_SIZE, create one, initialize | |
2540 | it with offset, size and contains_variable to PRE_EXISTING, and return true, | |
2541 | unless there are too many already. If there are two many, return false. If | |
2542 | there are overlaps turn whole DEST_PLATS to bottom and return false. If any | |
2543 | skipped lattices were newly marked as containing variable, set *CHANGE to | |
de2e0835 | 2544 | true. MAX_AGG_ITEMS is the maximum number of lattices. */ |
2c9561b5 MJ |
2545 | |
2546 | static bool | |
99b1c316 | 2547 | merge_agg_lats_step (class ipcp_param_lattices *dest_plats, |
2c9561b5 MJ |
2548 | HOST_WIDE_INT offset, HOST_WIDE_INT val_size, |
2549 | struct ipcp_agg_lattice ***aglat, | |
de2e0835 | 2550 | bool pre_existing, bool *change, int max_agg_items) |
2c9561b5 MJ |
2551 | { |
2552 | gcc_checking_assert (offset >= 0); | |
2553 | ||
2554 | while (**aglat && (**aglat)->offset < offset) | |
2555 | { | |
2556 | if ((**aglat)->offset + (**aglat)->size > offset) | |
2557 | { | |
2558 | set_agg_lats_to_bottom (dest_plats); | |
2559 | return false; | |
2560 | } | |
c0cb5055 | 2561 | *change |= (**aglat)->set_contains_variable (); |
2c9561b5 MJ |
2562 | *aglat = &(**aglat)->next; |
2563 | } | |
2564 | ||
2565 | if (**aglat && (**aglat)->offset == offset) | |
2566 | { | |
b66113e9 | 2567 | if ((**aglat)->size != val_size) |
2c9561b5 MJ |
2568 | { |
2569 | set_agg_lats_to_bottom (dest_plats); | |
2570 | return false; | |
2571 | } | |
b66113e9 MJ |
2572 | gcc_assert (!(**aglat)->next |
2573 | || (**aglat)->next->offset >= offset + val_size); | |
2c9561b5 MJ |
2574 | return true; |
2575 | } | |
2576 | else | |
2577 | { | |
2578 | struct ipcp_agg_lattice *new_al; | |
2579 | ||
2580 | if (**aglat && (**aglat)->offset < offset + val_size) | |
2581 | { | |
2582 | set_agg_lats_to_bottom (dest_plats); | |
2583 | return false; | |
2584 | } | |
de2e0835 | 2585 | if (dest_plats->aggs_count == max_agg_items) |
2c9561b5 MJ |
2586 | return false; |
2587 | dest_plats->aggs_count++; | |
2651e637 | 2588 | new_al = ipcp_agg_lattice_pool.allocate (); |
2c9561b5 MJ |
2589 | memset (new_al, 0, sizeof (*new_al)); |
2590 | ||
2591 | new_al->offset = offset; | |
2592 | new_al->size = val_size; | |
2593 | new_al->contains_variable = pre_existing; | |
2594 | ||
2595 | new_al->next = **aglat; | |
2596 | **aglat = new_al; | |
2597 | return true; | |
2598 | } | |
2599 | } | |
2600 | ||
2601 | /* Set all AGLAT and all other aggregate lattices reachable by next pointers as | |
2602 | containing an unknown value. */ | |
2603 | ||
2604 | static bool | |
2605 | set_chain_of_aglats_contains_variable (struct ipcp_agg_lattice *aglat) | |
2606 | { | |
2607 | bool ret = false; | |
2608 | while (aglat) | |
2609 | { | |
c0cb5055 | 2610 | ret |= aglat->set_contains_variable (); |
2c9561b5 MJ |
2611 | aglat = aglat->next; |
2612 | } | |
2613 | return ret; | |
2614 | } | |
2615 | ||
2616 | /* Merge existing aggregate lattices in SRC_PLATS to DEST_PLATS, subtracting | |
2617 | DELTA_OFFSET. CS is the call graph edge and SRC_IDX the index of the source | |
2618 | parameter used for lattice value sources. Return true if DEST_PLATS changed | |
2619 | in any way. */ | |
2620 | ||
2621 | static bool | |
2622 | merge_aggregate_lattices (struct cgraph_edge *cs, | |
99b1c316 MS |
2623 | class ipcp_param_lattices *dest_plats, |
2624 | class ipcp_param_lattices *src_plats, | |
2c9561b5 MJ |
2625 | int src_idx, HOST_WIDE_INT offset_delta) |
2626 | { | |
2627 | bool pre_existing = dest_plats->aggs != NULL; | |
2628 | struct ipcp_agg_lattice **dst_aglat; | |
2629 | bool ret = false; | |
2630 | ||
2631 | if (set_check_aggs_by_ref (dest_plats, src_plats->aggs_by_ref)) | |
2632 | return true; | |
2633 | if (src_plats->aggs_bottom) | |
2634 | return set_agg_lats_contain_variable (dest_plats); | |
3e452a28 MJ |
2635 | if (src_plats->aggs_contain_variable) |
2636 | ret |= set_agg_lats_contain_variable (dest_plats); | |
2c9561b5 MJ |
2637 | dst_aglat = &dest_plats->aggs; |
2638 | ||
de2e0835 MJ |
2639 | int max_agg_items = opt_for_fn (cs->callee->function_symbol ()->decl, |
2640 | param_ipa_max_agg_items); | |
2c9561b5 MJ |
2641 | for (struct ipcp_agg_lattice *src_aglat = src_plats->aggs; |
2642 | src_aglat; | |
2643 | src_aglat = src_aglat->next) | |
2644 | { | |
2645 | HOST_WIDE_INT new_offset = src_aglat->offset - offset_delta; | |
2646 | ||
2647 | if (new_offset < 0) | |
2648 | continue; | |
2649 | if (merge_agg_lats_step (dest_plats, new_offset, src_aglat->size, | |
de2e0835 | 2650 | &dst_aglat, pre_existing, &ret, max_agg_items)) |
2c9561b5 MJ |
2651 | { |
2652 | struct ipcp_agg_lattice *new_al = *dst_aglat; | |
2653 | ||
2654 | dst_aglat = &(*dst_aglat)->next; | |
2655 | if (src_aglat->bottom) | |
2656 | { | |
c0cb5055 | 2657 | ret |= new_al->set_contains_variable (); |
2c9561b5 MJ |
2658 | continue; |
2659 | } | |
2660 | if (src_aglat->contains_variable) | |
c0cb5055 MJ |
2661 | ret |= new_al->set_contains_variable (); |
2662 | for (ipcp_value<tree> *val = src_aglat->values; | |
2c9561b5 MJ |
2663 | val; |
2664 | val = val->next) | |
c0cb5055 MJ |
2665 | ret |= new_al->add_value (val->value, cs, val, src_idx, |
2666 | src_aglat->offset); | |
2c9561b5 MJ |
2667 | } |
2668 | else if (dest_plats->aggs_bottom) | |
2669 | return true; | |
2670 | } | |
2671 | ret |= set_chain_of_aglats_contains_variable (*dst_aglat); | |
2672 | return ret; | |
2673 | } | |
2674 | ||
324e93f1 MJ |
2675 | /* Determine whether there is anything to propagate FROM SRC_PLATS through a |
2676 | pass-through JFUNC and if so, whether it has conform and conforms to the | |
2677 | rules about propagating values passed by reference. */ | |
2678 | ||
2679 | static bool | |
99b1c316 | 2680 | agg_pass_through_permissible_p (class ipcp_param_lattices *src_plats, |
324e93f1 MJ |
2681 | struct ipa_jump_func *jfunc) |
2682 | { | |
2683 | return src_plats->aggs | |
2684 | && (!src_plats->aggs_by_ref | |
2685 | || ipa_get_jf_pass_through_agg_preserved (jfunc)); | |
2686 | } | |
2687 | ||
eb270950 FX |
2688 | /* Propagate values through ITEM, jump function for a part of an aggregate, |
2689 | into corresponding aggregate lattice AGLAT. CS is the call graph edge | |
2690 | associated with the jump function. Return true if AGLAT changed in any | |
2691 | way. */ | |
2692 | ||
2693 | static bool | |
2694 | propagate_aggregate_lattice (struct cgraph_edge *cs, | |
2695 | struct ipa_agg_jf_item *item, | |
2696 | struct ipcp_agg_lattice *aglat) | |
2697 | { | |
2698 | class ipa_node_params *caller_info; | |
2699 | class ipcp_param_lattices *src_plats; | |
2700 | struct ipcp_lattice<tree> *src_lat; | |
2701 | HOST_WIDE_INT src_offset; | |
2702 | int src_idx; | |
2703 | tree load_type; | |
2704 | bool ret; | |
2705 | ||
2706 | if (item->jftype == IPA_JF_CONST) | |
2707 | { | |
2708 | tree value = item->value.constant; | |
2709 | ||
2710 | gcc_checking_assert (is_gimple_ip_invariant (value)); | |
2711 | return aglat->add_value (value, cs, NULL, 0); | |
2712 | } | |
2713 | ||
2714 | gcc_checking_assert (item->jftype == IPA_JF_PASS_THROUGH | |
2715 | || item->jftype == IPA_JF_LOAD_AGG); | |
2716 | ||
a4a3cdd0 | 2717 | caller_info = ipa_node_params_sum->get (cs->caller); |
eb270950 FX |
2718 | src_idx = item->value.pass_through.formal_id; |
2719 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); | |
2720 | ||
2721 | if (item->jftype == IPA_JF_PASS_THROUGH) | |
2722 | { | |
2723 | load_type = NULL_TREE; | |
2724 | src_lat = &src_plats->itself; | |
2725 | src_offset = -1; | |
2726 | } | |
2727 | else | |
2728 | { | |
2729 | HOST_WIDE_INT load_offset = item->value.load_agg.offset; | |
2730 | struct ipcp_agg_lattice *src_aglat; | |
2731 | ||
2732 | for (src_aglat = src_plats->aggs; src_aglat; src_aglat = src_aglat->next) | |
2733 | if (src_aglat->offset >= load_offset) | |
2734 | break; | |
2735 | ||
2736 | load_type = item->value.load_agg.type; | |
2737 | if (!src_aglat | |
2738 | || src_aglat->offset > load_offset | |
2739 | || src_aglat->size != tree_to_shwi (TYPE_SIZE (load_type)) | |
2740 | || src_plats->aggs_by_ref != item->value.load_agg.by_ref) | |
2741 | return aglat->set_contains_variable (); | |
2742 | ||
2743 | src_lat = src_aglat; | |
2744 | src_offset = load_offset; | |
2745 | } | |
2746 | ||
2747 | if (src_lat->bottom | |
2748 | || (!ipcp_versionable_function_p (cs->caller) | |
2749 | && !src_lat->is_single_const ())) | |
2750 | return aglat->set_contains_variable (); | |
2751 | ||
2752 | ret = propagate_vals_across_arith_jfunc (cs, | |
2753 | item->value.pass_through.operation, | |
2754 | load_type, | |
2755 | item->value.pass_through.operand, | |
2756 | src_lat, aglat, | |
2757 | src_offset, | |
2758 | src_idx, | |
2759 | item->type); | |
2760 | ||
2761 | if (src_lat->contains_variable) | |
2762 | ret |= aglat->set_contains_variable (); | |
2763 | ||
2764 | return ret; | |
2765 | } | |
2766 | ||
2c9561b5 MJ |
2767 | /* Propagate scalar values across jump function JFUNC that is associated with |
2768 | edge CS and put the values into DEST_LAT. */ | |
2769 | ||
2770 | static bool | |
155c9907 JJ |
2771 | propagate_aggs_across_jump_function (struct cgraph_edge *cs, |
2772 | struct ipa_jump_func *jfunc, | |
99b1c316 | 2773 | class ipcp_param_lattices *dest_plats) |
2c9561b5 MJ |
2774 | { |
2775 | bool ret = false; | |
2776 | ||
2777 | if (dest_plats->aggs_bottom) | |
2778 | return false; | |
2779 | ||
2780 | if (jfunc->type == IPA_JF_PASS_THROUGH | |
2781 | && ipa_get_jf_pass_through_operation (jfunc) == NOP_EXPR) | |
2782 | { | |
a4a3cdd0 | 2783 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
2c9561b5 | 2784 | int src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
99b1c316 | 2785 | class ipcp_param_lattices *src_plats; |
2c9561b5 MJ |
2786 | |
2787 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); | |
324e93f1 | 2788 | if (agg_pass_through_permissible_p (src_plats, jfunc)) |
2c9561b5 MJ |
2789 | { |
2790 | /* Currently we do not produce clobber aggregate jump | |
2791 | functions, replace with merging when we do. */ | |
2792 | gcc_assert (!jfunc->agg.items); | |
2793 | ret |= merge_aggregate_lattices (cs, dest_plats, src_plats, | |
2794 | src_idx, 0); | |
32633ec8 | 2795 | return ret; |
2c9561b5 | 2796 | } |
2c9561b5 MJ |
2797 | } |
2798 | else if (jfunc->type == IPA_JF_ANCESTOR | |
2799 | && ipa_get_jf_ancestor_agg_preserved (jfunc)) | |
2800 | { | |
a4a3cdd0 | 2801 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
2c9561b5 | 2802 | int src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
99b1c316 | 2803 | class ipcp_param_lattices *src_plats; |
2c9561b5 MJ |
2804 | |
2805 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); | |
2806 | if (src_plats->aggs && src_plats->aggs_by_ref) | |
2807 | { | |
2808 | /* Currently we do not produce clobber aggregate jump | |
2809 | functions, replace with merging when we do. */ | |
2810 | gcc_assert (!jfunc->agg.items); | |
2811 | ret |= merge_aggregate_lattices (cs, dest_plats, src_plats, src_idx, | |
2812 | ipa_get_jf_ancestor_offset (jfunc)); | |
2813 | } | |
2814 | else if (!src_plats->aggs_by_ref) | |
2815 | ret |= set_agg_lats_to_bottom (dest_plats); | |
2816 | else | |
2817 | ret |= set_agg_lats_contain_variable (dest_plats); | |
32633ec8 | 2818 | return ret; |
2c9561b5 | 2819 | } |
32633ec8 FX |
2820 | |
2821 | if (jfunc->agg.items) | |
2c9561b5 MJ |
2822 | { |
2823 | bool pre_existing = dest_plats->aggs != NULL; | |
2824 | struct ipcp_agg_lattice **aglat = &dest_plats->aggs; | |
2825 | struct ipa_agg_jf_item *item; | |
2826 | int i; | |
2827 | ||
2828 | if (set_check_aggs_by_ref (dest_plats, jfunc->agg.by_ref)) | |
2829 | return true; | |
2830 | ||
de2e0835 MJ |
2831 | int max_agg_items = opt_for_fn (cs->callee->function_symbol ()->decl, |
2832 | param_ipa_max_agg_items); | |
9771b263 | 2833 | FOR_EACH_VEC_ELT (*jfunc->agg.items, i, item) |
2c9561b5 MJ |
2834 | { |
2835 | HOST_WIDE_INT val_size; | |
2836 | ||
eb270950 | 2837 | if (item->offset < 0 || item->jftype == IPA_JF_UNKNOWN) |
2c9561b5 | 2838 | continue; |
eb270950 | 2839 | val_size = tree_to_shwi (TYPE_SIZE (item->type)); |
2c9561b5 MJ |
2840 | |
2841 | if (merge_agg_lats_step (dest_plats, item->offset, val_size, | |
de2e0835 | 2842 | &aglat, pre_existing, &ret, max_agg_items)) |
2c9561b5 | 2843 | { |
eb270950 | 2844 | ret |= propagate_aggregate_lattice (cs, item, *aglat); |
2c9561b5 MJ |
2845 | aglat = &(*aglat)->next; |
2846 | } | |
2847 | else if (dest_plats->aggs_bottom) | |
2848 | return true; | |
2849 | } | |
2850 | ||
2851 | ret |= set_chain_of_aglats_contains_variable (*aglat); | |
2852 | } | |
2853 | else | |
2854 | ret |= set_agg_lats_contain_variable (dest_plats); | |
2855 | ||
2856 | return ret; | |
2857 | } | |
2858 | ||
173b7355 MJ |
2859 | /* Return true if on the way cfrom CS->caller to the final (non-alias and |
2860 | non-thunk) destination, the call passes through a thunk. */ | |
2861 | ||
2862 | static bool | |
67f3791f | 2863 | call_passes_through_thunk (cgraph_edge *cs) |
173b7355 MJ |
2864 | { |
2865 | cgraph_node *alias_or_thunk = cs->callee; | |
2866 | while (alias_or_thunk->alias) | |
2867 | alias_or_thunk = alias_or_thunk->get_alias_target (); | |
67f3791f | 2868 | return alias_or_thunk->thunk; |
173b7355 MJ |
2869 | } |
2870 | ||
310bc633 MJ |
2871 | /* Propagate constants from the caller to the callee of CS. INFO describes the |
2872 | caller. */ | |
2873 | ||
2874 | static bool | |
155c9907 | 2875 | propagate_constants_across_call (struct cgraph_edge *cs) |
310bc633 | 2876 | { |
99b1c316 | 2877 | class ipa_node_params *callee_info; |
310bc633 | 2878 | enum availability availability; |
173b7355 | 2879 | cgraph_node *callee; |
99b1c316 | 2880 | class ipa_edge_args *args; |
310bc633 | 2881 | bool ret = false; |
d7da5cc8 | 2882 | int i, args_count, parms_count; |
310bc633 | 2883 | |
d52f5295 | 2884 | callee = cs->callee->function_symbol (&availability); |
67348ccc | 2885 | if (!callee->definition) |
310bc633 | 2886 | return false; |
d52f5295 | 2887 | gcc_checking_assert (callee->has_gimple_body_p ()); |
a4a3cdd0 | 2888 | callee_info = ipa_node_params_sum->get (callee); |
6cf67b62 JH |
2889 | if (!callee_info) |
2890 | return false; | |
310bc633 | 2891 | |
a4a3cdd0 | 2892 | args = ipa_edge_args_sum->get (cs); |
d7da5cc8 | 2893 | parms_count = ipa_get_param_count (callee_info); |
f3fec19f MJ |
2894 | if (parms_count == 0) |
2895 | return false; | |
e72763e2 JH |
2896 | if (!args |
2897 | || !opt_for_fn (cs->caller->decl, flag_ipa_cp) | |
2898 | || !opt_for_fn (cs->caller->decl, optimize)) | |
a33c028e JH |
2899 | { |
2900 | for (i = 0; i < parms_count; i++) | |
2901 | ret |= set_all_contains_variable (ipa_get_parm_lattices (callee_info, | |
2902 | i)); | |
2903 | return ret; | |
2904 | } | |
2905 | args_count = ipa_get_cs_argument_count (args); | |
310bc633 MJ |
2906 | |
2907 | /* If this call goes through a thunk we must not propagate to the first (0th) | |
2908 | parameter. However, we might need to uncover a thunk from below a series | |
2909 | of aliases first. */ | |
67f3791f | 2910 | if (call_passes_through_thunk (cs)) |
310bc633 | 2911 | { |
2c9561b5 MJ |
2912 | ret |= set_all_contains_variable (ipa_get_parm_lattices (callee_info, |
2913 | 0)); | |
310bc633 MJ |
2914 | i = 1; |
2915 | } | |
2916 | else | |
2917 | i = 0; | |
2918 | ||
d7da5cc8 | 2919 | for (; (i < args_count) && (i < parms_count); i++) |
310bc633 MJ |
2920 | { |
2921 | struct ipa_jump_func *jump_func = ipa_get_ith_jump_func (args, i); | |
99b1c316 | 2922 | class ipcp_param_lattices *dest_plats; |
a5e14a42 | 2923 | tree param_type = ipa_get_type (callee_info, i); |
310bc633 | 2924 | |
2c9561b5 | 2925 | dest_plats = ipa_get_parm_lattices (callee_info, i); |
d52f5295 | 2926 | if (availability == AVAIL_INTERPOSABLE) |
2c9561b5 | 2927 | ret |= set_all_contains_variable (dest_plats); |
310bc633 | 2928 | else |
2c9561b5 | 2929 | { |
155c9907 | 2930 | ret |= propagate_scalar_across_jump_function (cs, jump_func, |
e5cf5e11 PK |
2931 | &dest_plats->itself, |
2932 | param_type); | |
155c9907 JJ |
2933 | ret |= propagate_context_across_jump_function (cs, jump_func, i, |
2934 | &dest_plats->ctxlat); | |
2935 | ret | |
2936 | |= propagate_bits_across_jump_function (cs, i, jump_func, | |
2937 | &dest_plats->bits_lattice); | |
2938 | ret |= propagate_aggs_across_jump_function (cs, jump_func, | |
2939 | dest_plats); | |
8bc5448f | 2940 | if (opt_for_fn (callee->decl, flag_ipa_vrp)) |
155c9907 JJ |
2941 | ret |= propagate_vr_across_jump_function (cs, jump_func, |
2942 | dest_plats, param_type); | |
8bc5448f KV |
2943 | else |
2944 | ret |= dest_plats->m_value_range.set_to_bottom (); | |
2c9561b5 | 2945 | } |
310bc633 | 2946 | } |
d7da5cc8 | 2947 | for (; i < parms_count; i++) |
2c9561b5 | 2948 | ret |= set_all_contains_variable (ipa_get_parm_lattices (callee_info, i)); |
d7da5cc8 | 2949 | |
310bc633 MJ |
2950 | return ret; |
2951 | } | |
2952 | ||
2953 | /* If an indirect edge IE can be turned into a direct one based on KNOWN_VALS | |
3b97a5c7 MJ |
2954 | KNOWN_CONTEXTS, KNOWN_AGGS or AGG_REPS return the destination. The latter |
2955 | three can be NULL. If AGG_REPS is not NULL, KNOWN_AGGS is ignored. */ | |
310bc633 | 2956 | |
162712de MJ |
2957 | static tree |
2958 | ipa_get_indirect_edge_target_1 (struct cgraph_edge *ie, | |
00dcc88a MS |
2959 | const vec<tree> &known_csts, |
2960 | const vec<ipa_polymorphic_call_context> &known_contexts, | |
2961 | const vec<ipa_agg_value_set> &known_aggs, | |
231b4916 JH |
2962 | struct ipa_agg_replacement_value *agg_reps, |
2963 | bool *speculative) | |
310bc633 MJ |
2964 | { |
2965 | int param_index = ie->indirect_info->param_index; | |
44210a96 | 2966 | HOST_WIDE_INT anc_offset; |
b0d55476 | 2967 | tree t = NULL; |
85942f45 | 2968 | tree target = NULL; |
310bc633 | 2969 | |
231b4916 JH |
2970 | *speculative = false; |
2971 | ||
b0d55476 | 2972 | if (param_index == -1) |
310bc633 MJ |
2973 | return NULL_TREE; |
2974 | ||
2975 | if (!ie->indirect_info->polymorphic) | |
2976 | { | |
b0d55476 | 2977 | tree t = NULL; |
8810cc52 MJ |
2978 | |
2979 | if (ie->indirect_info->agg_contents) | |
2980 | { | |
91bb9f80 MJ |
2981 | t = NULL; |
2982 | if (agg_reps && ie->indirect_info->guaranteed_unmodified) | |
162712de | 2983 | { |
162712de MJ |
2984 | while (agg_reps) |
2985 | { | |
2986 | if (agg_reps->index == param_index | |
7b920a9a MJ |
2987 | && agg_reps->offset == ie->indirect_info->offset |
2988 | && agg_reps->by_ref == ie->indirect_info->by_ref) | |
162712de MJ |
2989 | { |
2990 | t = agg_reps->value; | |
2991 | break; | |
2992 | } | |
2993 | agg_reps = agg_reps->next; | |
2994 | } | |
2995 | } | |
91bb9f80 | 2996 | if (!t) |
8810cc52 | 2997 | { |
00dcc88a | 2998 | const ipa_agg_value_set *agg; |
91bb9f80 | 2999 | if (known_aggs.length () > (unsigned int) param_index) |
eb270950 | 3000 | agg = &known_aggs[param_index]; |
91bb9f80 MJ |
3001 | else |
3002 | agg = NULL; | |
3003 | bool from_global_constant; | |
b0d55476 JH |
3004 | t = ipa_find_agg_cst_for_param (agg, |
3005 | (unsigned) param_index | |
3006 | < known_csts.length () | |
3007 | ? known_csts[param_index] | |
3008 | : NULL, | |
91bb9f80 MJ |
3009 | ie->indirect_info->offset, |
3010 | ie->indirect_info->by_ref, | |
3011 | &from_global_constant); | |
44a71f36 MJ |
3012 | if (t |
3013 | && !from_global_constant | |
91bb9f80 MJ |
3014 | && !ie->indirect_info->guaranteed_unmodified) |
3015 | t = NULL_TREE; | |
8810cc52 | 3016 | } |
8810cc52 | 3017 | } |
b0d55476 | 3018 | else if ((unsigned) param_index < known_csts.length ()) |
44210a96 | 3019 | t = known_csts[param_index]; |
8810cc52 | 3020 | |
155c9907 JJ |
3021 | if (t |
3022 | && TREE_CODE (t) == ADDR_EXPR | |
310bc633 | 3023 | && TREE_CODE (TREE_OPERAND (t, 0)) == FUNCTION_DECL) |
81fa35bd | 3024 | return TREE_OPERAND (t, 0); |
310bc633 MJ |
3025 | else |
3026 | return NULL_TREE; | |
3027 | } | |
3028 | ||
2bf86c84 | 3029 | if (!opt_for_fn (ie->caller->decl, flag_devirtualize)) |
85942f45 JH |
3030 | return NULL_TREE; |
3031 | ||
8810cc52 | 3032 | gcc_assert (!ie->indirect_info->agg_contents); |
8b7773a4 | 3033 | anc_offset = ie->indirect_info->offset; |
310bc633 | 3034 | |
85942f45 JH |
3035 | t = NULL; |
3036 | ||
f25ae20e | 3037 | /* Try to work out value of virtual table pointer value in replacements. */ |
231b4916 | 3038 | if (!t && agg_reps && !ie->indirect_info->by_ref) |
85942f45 JH |
3039 | { |
3040 | while (agg_reps) | |
3041 | { | |
3042 | if (agg_reps->index == param_index | |
3043 | && agg_reps->offset == ie->indirect_info->offset | |
3044 | && agg_reps->by_ref) | |
3045 | { | |
3046 | t = agg_reps->value; | |
3047 | break; | |
3048 | } | |
3049 | agg_reps = agg_reps->next; | |
3050 | } | |
3051 | } | |
3052 | ||
3053 | /* Try to work out value of virtual table pointer value in known | |
3054 | aggregate values. */ | |
3055 | if (!t && known_aggs.length () > (unsigned int) param_index | |
231b4916 | 3056 | && !ie->indirect_info->by_ref) |
85942f45 | 3057 | { |
00dcc88a | 3058 | const ipa_agg_value_set *agg = &known_aggs[param_index]; |
b0d55476 JH |
3059 | t = ipa_find_agg_cst_for_param (agg, |
3060 | (unsigned) param_index | |
3061 | < known_csts.length () | |
3062 | ? known_csts[param_index] : NULL, | |
155c9907 | 3063 | ie->indirect_info->offset, true); |
85942f45 JH |
3064 | } |
3065 | ||
9de2f554 | 3066 | /* If we found the virtual table pointer, lookup the target. */ |
85942f45 | 3067 | if (t) |
9de2f554 JH |
3068 | { |
3069 | tree vtable; | |
3070 | unsigned HOST_WIDE_INT offset; | |
3071 | if (vtable_pointer_value_to_vtable (t, &vtable, &offset)) | |
3072 | { | |
2994ab20 | 3073 | bool can_refer; |
9de2f554 | 3074 | target = gimple_get_virt_method_for_vtable (ie->indirect_info->otr_token, |
2994ab20 JH |
3075 | vtable, offset, &can_refer); |
3076 | if (can_refer) | |
9de2f554 | 3077 | { |
2994ab20 | 3078 | if (!target |
cb1180d5 | 3079 | || fndecl_built_in_p (target, BUILT_IN_UNREACHABLE) |
8472fa80 | 3080 | || !possible_polymorphic_call_target_p |
d52f5295 | 3081 | (ie, cgraph_node::get (target))) |
2994ab20 JH |
3082 | { |
3083 | /* Do not speculate builtin_unreachable, it is stupid! */ | |
3084 | if (ie->indirect_info->vptr_changed) | |
3085 | return NULL; | |
3086 | target = ipa_impossible_devirt_target (ie, target); | |
3087 | } | |
155c9907 | 3088 | *speculative = ie->indirect_info->vptr_changed; |
231b4916 | 3089 | if (!*speculative) |
155c9907 | 3090 | return target; |
9de2f554 | 3091 | } |
9de2f554 JH |
3092 | } |
3093 | } | |
85942f45 | 3094 | |
44210a96 | 3095 | /* Do we know the constant value of pointer? */ |
b0d55476 | 3096 | if (!t && (unsigned) param_index < known_csts.length ()) |
44210a96 | 3097 | t = known_csts[param_index]; |
310bc633 | 3098 | |
44210a96 MJ |
3099 | gcc_checking_assert (!t || TREE_CODE (t) != TREE_BINFO); |
3100 | ||
3101 | ipa_polymorphic_call_context context; | |
3102 | if (known_contexts.length () > (unsigned int) param_index) | |
310bc633 | 3103 | { |
44210a96 | 3104 | context = known_contexts[param_index]; |
df0d8136 JH |
3105 | context.offset_by (anc_offset); |
3106 | if (ie->indirect_info->vptr_changed) | |
3107 | context.possible_dynamic_type_change (ie->in_polymorphic_cdtor, | |
3108 | ie->indirect_info->otr_type); | |
44210a96 MJ |
3109 | if (t) |
3110 | { | |
3111 | ipa_polymorphic_call_context ctx2 = ipa_polymorphic_call_context | |
3112 | (t, ie->indirect_info->otr_type, anc_offset); | |
3113 | if (!ctx2.useless_p ()) | |
3114 | context.combine_with (ctx2, ie->indirect_info->otr_type); | |
3115 | } | |
310bc633 | 3116 | } |
44210a96 | 3117 | else if (t) |
33c3b6be JH |
3118 | { |
3119 | context = ipa_polymorphic_call_context (t, ie->indirect_info->otr_type, | |
3120 | anc_offset); | |
3121 | if (ie->indirect_info->vptr_changed) | |
3122 | context.possible_dynamic_type_change (ie->in_polymorphic_cdtor, | |
3123 | ie->indirect_info->otr_type); | |
3124 | } | |
310bc633 | 3125 | else |
44210a96 | 3126 | return NULL_TREE; |
310bc633 | 3127 | |
44210a96 MJ |
3128 | vec <cgraph_node *>targets; |
3129 | bool final; | |
3130 | ||
3131 | targets = possible_polymorphic_call_targets | |
3132 | (ie->indirect_info->otr_type, | |
3133 | ie->indirect_info->otr_token, | |
3134 | context, &final); | |
3135 | if (!final || targets.length () > 1) | |
231b4916 JH |
3136 | { |
3137 | struct cgraph_node *node; | |
3138 | if (*speculative) | |
3139 | return target; | |
2bf86c84 JH |
3140 | if (!opt_for_fn (ie->caller->decl, flag_devirtualize_speculatively) |
3141 | || ie->speculative || !ie->maybe_hot_p ()) | |
231b4916 JH |
3142 | return NULL; |
3143 | node = try_speculative_devirtualization (ie->indirect_info->otr_type, | |
3144 | ie->indirect_info->otr_token, | |
3145 | context); | |
3146 | if (node) | |
3147 | { | |
3148 | *speculative = true; | |
3149 | target = node->decl; | |
3150 | } | |
3151 | else | |
3152 | return NULL; | |
3153 | } | |
44210a96 | 3154 | else |
231b4916 JH |
3155 | { |
3156 | *speculative = false; | |
3157 | if (targets.length () == 1) | |
3158 | target = targets[0]->decl; | |
3159 | else | |
3160 | target = ipa_impossible_devirt_target (ie, NULL_TREE); | |
3161 | } | |
b5165eb0 MJ |
3162 | |
3163 | if (target && !possible_polymorphic_call_target_p (ie, | |
d52f5295 | 3164 | cgraph_node::get (target))) |
2994ab20 JH |
3165 | { |
3166 | if (*speculative) | |
3167 | return NULL; | |
3168 | target = ipa_impossible_devirt_target (ie, target); | |
3169 | } | |
450ad0cd JH |
3170 | |
3171 | return target; | |
310bc633 MJ |
3172 | } |
3173 | ||
9d5af1db MJ |
3174 | /* If an indirect edge IE can be turned into a direct one based on data in |
3175 | AVALS, return the destination. Store into *SPECULATIVE a boolean determinig | |
3176 | whether the discovered target is only speculative guess. */ | |
162712de | 3177 | |
9d5af1db MJ |
3178 | tree |
3179 | ipa_get_indirect_edge_target (struct cgraph_edge *ie, | |
3180 | ipa_call_arg_values *avals, | |
3181 | bool *speculative) | |
3182 | { | |
3183 | return ipa_get_indirect_edge_target_1 (ie, avals->m_known_vals, | |
3184 | avals->m_known_contexts, | |
3185 | avals->m_known_aggs, | |
3186 | NULL, speculative); | |
3187 | } | |
3188 | ||
3189 | /* The same functionality as above overloaded for ipa_auto_call_arg_values. */ | |
162712de MJ |
3190 | |
3191 | tree | |
3192 | ipa_get_indirect_edge_target (struct cgraph_edge *ie, | |
9d5af1db | 3193 | ipa_auto_call_arg_values *avals, |
231b4916 | 3194 | bool *speculative) |
162712de | 3195 | { |
9d5af1db MJ |
3196 | return ipa_get_indirect_edge_target_1 (ie, avals->m_known_vals, |
3197 | avals->m_known_contexts, | |
3198 | avals->m_known_aggs, | |
3199 | NULL, speculative); | |
162712de MJ |
3200 | } |
3201 | ||
9d5af1db MJ |
3202 | /* Calculate devirtualization time bonus for NODE, assuming we know information |
3203 | about arguments stored in AVALS. */ | |
310bc633 MJ |
3204 | |
3205 | static int | |
3206 | devirtualization_time_bonus (struct cgraph_node *node, | |
9d5af1db | 3207 | ipa_auto_call_arg_values *avals) |
310bc633 MJ |
3208 | { |
3209 | struct cgraph_edge *ie; | |
3210 | int res = 0; | |
3211 | ||
3212 | for (ie = node->indirect_calls; ie; ie = ie->next_callee) | |
3213 | { | |
3214 | struct cgraph_node *callee; | |
99b1c316 | 3215 | class ipa_fn_summary *isummary; |
8ad274d2 | 3216 | enum availability avail; |
81fa35bd | 3217 | tree target; |
231b4916 | 3218 | bool speculative; |
310bc633 | 3219 | |
9d5af1db | 3220 | target = ipa_get_indirect_edge_target (ie, avals, &speculative); |
310bc633 MJ |
3221 | if (!target) |
3222 | continue; | |
3223 | ||
3224 | /* Only bare minimum benefit for clearly un-inlineable targets. */ | |
3225 | res += 1; | |
d52f5295 | 3226 | callee = cgraph_node::get (target); |
67348ccc | 3227 | if (!callee || !callee->definition) |
310bc633 | 3228 | continue; |
d52f5295 | 3229 | callee = callee->function_symbol (&avail); |
8ad274d2 JH |
3230 | if (avail < AVAIL_AVAILABLE) |
3231 | continue; | |
56f62793 | 3232 | isummary = ipa_fn_summaries->get (callee); |
8472660b | 3233 | if (!isummary || !isummary->inlinable) |
310bc633 MJ |
3234 | continue; |
3235 | ||
f658ad30 | 3236 | int size = ipa_size_summaries->get (callee)->size; |
310bc633 MJ |
3237 | /* FIXME: The values below need re-considering and perhaps also |
3238 | integrating into the cost metrics, at lest in some very basic way. */ | |
78a502ca ML |
3239 | int max_inline_insns_auto |
3240 | = opt_for_fn (callee->decl, param_max_inline_insns_auto); | |
3241 | if (size <= max_inline_insns_auto / 4) | |
231b4916 | 3242 | res += 31 / ((int)speculative + 1); |
78a502ca | 3243 | else if (size <= max_inline_insns_auto / 2) |
231b4916 | 3244 | res += 15 / ((int)speculative + 1); |
78a502ca | 3245 | else if (size <= max_inline_insns_auto |
67348ccc | 3246 | || DECL_DECLARED_INLINE_P (callee->decl)) |
231b4916 | 3247 | res += 7 / ((int)speculative + 1); |
310bc633 MJ |
3248 | } |
3249 | ||
3250 | return res; | |
3251 | } | |
3252 | ||
1e7fdc02 | 3253 | /* Return time bonus incurred because of hints stored in ESTIMATES. */ |
2c9561b5 MJ |
3254 | |
3255 | static int | |
1e7fdc02 | 3256 | hint_time_bonus (cgraph_node *node, const ipa_call_estimates &estimates) |
2c9561b5 | 3257 | { |
19321415 | 3258 | int result = 0; |
1e7fdc02 | 3259 | ipa_hints hints = estimates.hints; |
2c9561b5 | 3260 | if (hints & (INLINE_HINT_loop_iterations | INLINE_HINT_loop_stride)) |
fdfd7f53 | 3261 | result += opt_for_fn (node->decl, param_ipa_cp_loop_hint_bonus); |
67ce9099 MJ |
3262 | |
3263 | sreal bonus_for_one = opt_for_fn (node->decl, param_ipa_cp_loop_hint_bonus); | |
3264 | ||
3265 | if (hints & INLINE_HINT_loop_iterations) | |
3266 | result += (estimates.loops_with_known_iterations * bonus_for_one).to_int (); | |
3267 | ||
3268 | if (hints & INLINE_HINT_loop_stride) | |
3269 | result += (estimates.loops_with_known_strides * bonus_for_one).to_int (); | |
3270 | ||
19321415 | 3271 | return result; |
2c9561b5 MJ |
3272 | } |
3273 | ||
af21714c MJ |
3274 | /* If there is a reason to penalize the function described by INFO in the |
3275 | cloning goodness evaluation, do so. */ | |
3276 | ||
b86aedb0 | 3277 | static inline sreal |
fdfd7f53 | 3278 | incorporate_penalties (cgraph_node *node, ipa_node_params *info, |
b86aedb0 | 3279 | sreal evaluation) |
af21714c | 3280 | { |
9b14fc33 | 3281 | if (info->node_within_scc && !info->node_is_self_scc) |
af21714c | 3282 | evaluation = (evaluation |
fdfd7f53 ML |
3283 | * (100 - opt_for_fn (node->decl, |
3284 | param_ipa_cp_recursion_penalty))) / 100; | |
af21714c MJ |
3285 | |
3286 | if (info->node_calling_single_call) | |
3287 | evaluation = (evaluation | |
fdfd7f53 ML |
3288 | * (100 - opt_for_fn (node->decl, |
3289 | param_ipa_cp_single_call_penalty))) | |
af21714c MJ |
3290 | / 100; |
3291 | ||
3292 | return evaluation; | |
3293 | } | |
3294 | ||
310bc633 MJ |
3295 | /* Return true if cloning NODE is a good idea, given the estimated TIME_BENEFIT |
3296 | and SIZE_COST and with the sum of frequencies of incoming edges to the | |
3297 | potential new clone in FREQUENCIES. */ | |
3298 | ||
3299 | static bool | |
b86aedb0 MJ |
3300 | good_cloning_opportunity_p (struct cgraph_node *node, sreal time_benefit, |
3301 | sreal freq_sum, profile_count count_sum, | |
3302 | int size_cost) | |
310bc633 MJ |
3303 | { |
3304 | if (time_benefit == 0 | |
2bf86c84 | 3305 | || !opt_for_fn (node->decl, flag_ipa_cp_clone) |
5af56ae8 | 3306 | || node->optimize_for_size_p ()) |
310bc633 MJ |
3307 | return false; |
3308 | ||
df0227c4 | 3309 | gcc_assert (size_cost > 0); |
310bc633 | 3310 | |
a4a3cdd0 | 3311 | ipa_node_params *info = ipa_node_params_sum->get (node); |
fdfd7f53 | 3312 | int eval_threshold = opt_for_fn (node->decl, param_ipa_cp_eval_threshold); |
ab810952 | 3313 | if (count_sum > profile_count::zero ()) |
310bc633 | 3314 | { |
ab810952 | 3315 | gcc_assert (base_count > profile_count::zero ()); |
ab100825 | 3316 | sreal factor = count_sum.probability_in (base_count).to_sreal (); |
b86aedb0 | 3317 | sreal evaluation = (time_benefit * factor) / size_cost; |
fdfd7f53 | 3318 | evaluation = incorporate_penalties (node, info, evaluation); |
b86aedb0 | 3319 | evaluation *= 1000; |
310bc633 MJ |
3320 | |
3321 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3995f3a2 | 3322 | { |
b86aedb0 MJ |
3323 | fprintf (dump_file, " good_cloning_opportunity_p (time: %g, " |
3324 | "size: %i, count_sum: ", time_benefit.to_double (), | |
3325 | size_cost); | |
3995f3a2 | 3326 | count_sum.dump (dump_file); |
b86aedb0 | 3327 | fprintf (dump_file, "%s%s) -> evaluation: %.2f, threshold: %i\n", |
9b14fc33 FX |
3328 | info->node_within_scc |
3329 | ? (info->node_is_self_scc ? ", self_scc" : ", scc") : "", | |
af21714c | 3330 | info->node_calling_single_call ? ", single_call" : "", |
b86aedb0 | 3331 | evaluation.to_double (), eval_threshold); |
3995f3a2 | 3332 | } |
310bc633 | 3333 | |
b86aedb0 | 3334 | return evaluation.to_int () >= eval_threshold; |
310bc633 MJ |
3335 | } |
3336 | else | |
3337 | { | |
b86aedb0 | 3338 | sreal evaluation = (time_benefit * freq_sum) / size_cost; |
fdfd7f53 | 3339 | evaluation = incorporate_penalties (node, info, evaluation); |
b86aedb0 | 3340 | evaluation *= 1000; |
310bc633 MJ |
3341 | |
3342 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
b86aedb0 MJ |
3343 | fprintf (dump_file, " good_cloning_opportunity_p (time: %g, " |
3344 | "size: %i, freq_sum: %g%s%s) -> evaluation: %.2f, " | |
3345 | "threshold: %i\n", | |
3346 | time_benefit.to_double (), size_cost, freq_sum.to_double (), | |
9b14fc33 FX |
3347 | info->node_within_scc |
3348 | ? (info->node_is_self_scc ? ", self_scc" : ", scc") : "", | |
af21714c | 3349 | info->node_calling_single_call ? ", single_call" : "", |
b86aedb0 | 3350 | evaluation.to_double (), eval_threshold); |
310bc633 | 3351 | |
b86aedb0 | 3352 | return evaluation.to_int () >= eval_threshold; |
310bc633 MJ |
3353 | } |
3354 | } | |
3355 | ||
2c9561b5 MJ |
3356 | /* Return all context independent values from aggregate lattices in PLATS in a |
3357 | vector. Return NULL if there are none. */ | |
3358 | ||
eb270950 | 3359 | static vec<ipa_agg_value> |
99b1c316 | 3360 | context_independent_aggregate_values (class ipcp_param_lattices *plats) |
2c9561b5 | 3361 | { |
eb270950 | 3362 | vec<ipa_agg_value> res = vNULL; |
2c9561b5 MJ |
3363 | |
3364 | if (plats->aggs_bottom | |
3365 | || plats->aggs_contain_variable | |
3366 | || plats->aggs_count == 0) | |
eb270950 | 3367 | return vNULL; |
2c9561b5 MJ |
3368 | |
3369 | for (struct ipcp_agg_lattice *aglat = plats->aggs; | |
3370 | aglat; | |
3371 | aglat = aglat->next) | |
c0cb5055 | 3372 | if (aglat->is_single_const ()) |
2c9561b5 | 3373 | { |
eb270950 | 3374 | struct ipa_agg_value item; |
2c9561b5 MJ |
3375 | item.offset = aglat->offset; |
3376 | item.value = aglat->values->value; | |
eb270950 | 3377 | res.safe_push (item); |
2c9561b5 MJ |
3378 | } |
3379 | return res; | |
3380 | } | |
310bc633 | 3381 | |
9d5af1db MJ |
3382 | /* Grow vectors in AVALS and fill them with information about values of |
3383 | parameters that are known to be independent of the context. Only calculate | |
3384 | m_known_aggs if CALCULATE_AGGS is true. INFO describes the function. If | |
3385 | REMOVABLE_PARAMS_COST is non-NULL, the movement cost of all removable | |
3386 | parameters will be stored in it. | |
3387 | ||
3388 | TODO: Also grow context independent value range vectors. */ | |
310bc633 MJ |
3389 | |
3390 | static bool | |
99b1c316 | 3391 | gather_context_independent_values (class ipa_node_params *info, |
9d5af1db MJ |
3392 | ipa_auto_call_arg_values *avals, |
3393 | bool calculate_aggs, | |
44210a96 | 3394 | int *removable_params_cost) |
310bc633 MJ |
3395 | { |
3396 | int i, count = ipa_get_param_count (info); | |
3397 | bool ret = false; | |
3398 | ||
9d5af1db MJ |
3399 | avals->m_known_vals.safe_grow_cleared (count, true); |
3400 | avals->m_known_contexts.safe_grow_cleared (count, true); | |
3401 | if (calculate_aggs) | |
3402 | avals->m_known_aggs.safe_grow_cleared (count, true); | |
310bc633 MJ |
3403 | |
3404 | if (removable_params_cost) | |
3405 | *removable_params_cost = 0; | |
3406 | ||
155c9907 | 3407 | for (i = 0; i < count; i++) |
310bc633 | 3408 | { |
99b1c316 | 3409 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 | 3410 | ipcp_lattice<tree> *lat = &plats->itself; |
310bc633 | 3411 | |
c0cb5055 | 3412 | if (lat->is_single_const ()) |
310bc633 | 3413 | { |
c0cb5055 | 3414 | ipcp_value<tree> *val = lat->values; |
44210a96 | 3415 | gcc_checking_assert (TREE_CODE (val->value) != TREE_BINFO); |
9d5af1db | 3416 | avals->m_known_vals[i] = val->value; |
44210a96 MJ |
3417 | if (removable_params_cost) |
3418 | *removable_params_cost | |
3419 | += estimate_move_cost (TREE_TYPE (val->value), false); | |
3420 | ret = true; | |
310bc633 MJ |
3421 | } |
3422 | else if (removable_params_cost | |
3423 | && !ipa_is_param_used (info, i)) | |
3424 | *removable_params_cost | |
0e8853ee | 3425 | += ipa_get_param_move_cost (info, i); |
2c9561b5 | 3426 | |
5af56ae8 JH |
3427 | if (!ipa_is_param_used (info, i)) |
3428 | continue; | |
3429 | ||
44210a96 | 3430 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; |
5af56ae8 JH |
3431 | /* Do not account known context as reason for cloning. We can see |
3432 | if it permits devirtualization. */ | |
44210a96 | 3433 | if (ctxlat->is_single_const ()) |
9d5af1db | 3434 | avals->m_known_contexts[i] = ctxlat->values->value; |
44210a96 | 3435 | |
9d5af1db | 3436 | if (calculate_aggs) |
2c9561b5 | 3437 | { |
eb270950 FX |
3438 | vec<ipa_agg_value> agg_items; |
3439 | struct ipa_agg_value_set *agg; | |
2c9561b5 MJ |
3440 | |
3441 | agg_items = context_independent_aggregate_values (plats); | |
9d5af1db | 3442 | agg = &avals->m_known_aggs[i]; |
eb270950 FX |
3443 | agg->items = agg_items; |
3444 | agg->by_ref = plats->aggs_by_ref; | |
3445 | ret |= !agg_items.is_empty (); | |
2c9561b5 | 3446 | } |
310bc633 MJ |
3447 | } |
3448 | ||
3449 | return ret; | |
3450 | } | |
3451 | ||
9d5af1db MJ |
3452 | /* Perform time and size measurement of NODE with the context given in AVALS, |
3453 | calculate the benefit compared to the node without specialization and store | |
3454 | it into VAL. Take into account REMOVABLE_PARAMS_COST of all | |
3455 | context-independent or unused removable parameters and EST_MOVE_COST, the | |
3456 | estimated movement of the considered parameter. */ | |
c0cb5055 MJ |
3457 | |
3458 | static void | |
9d5af1db MJ |
3459 | perform_estimation_of_a_value (cgraph_node *node, |
3460 | ipa_auto_call_arg_values *avals, | |
3461 | int removable_params_cost, int est_move_cost, | |
3462 | ipcp_value_base *val) | |
c0cb5055 | 3463 | { |
b86aedb0 | 3464 | sreal time_benefit; |
1e7fdc02 | 3465 | ipa_call_estimates estimates; |
c0cb5055 | 3466 | |
1e7fdc02 | 3467 | estimate_ipcp_clone_size_and_time (node, avals, &estimates); |
59d9a0aa MJ |
3468 | |
3469 | /* Extern inline functions have no cloning local time benefits because they | |
3470 | will be inlined anyway. The only reason to clone them is if it enables | |
3471 | optimization in any of the functions they call. */ | |
3472 | if (DECL_EXTERNAL (node->decl) && DECL_DECLARED_INLINE_P (node->decl)) | |
3473 | time_benefit = 0; | |
3474 | else | |
b86aedb0 MJ |
3475 | time_benefit = (estimates.nonspecialized_time - estimates.time) |
3476 | + (devirtualization_time_bonus (node, avals) | |
3477 | + hint_time_bonus (node, estimates) | |
3478 | + removable_params_cost + est_move_cost); | |
c0cb5055 | 3479 | |
1e7fdc02 | 3480 | int size = estimates.size; |
c0cb5055 MJ |
3481 | gcc_checking_assert (size >=0); |
3482 | /* The inliner-heuristics based estimates may think that in certain | |
3483 | contexts some functions do not have any size at all but we want | |
3484 | all specializations to have at least a tiny cost, not least not to | |
3485 | divide by zero. */ | |
3486 | if (size == 0) | |
3487 | size = 1; | |
3488 | ||
3489 | val->local_time_benefit = time_benefit; | |
3490 | val->local_size_cost = size; | |
3491 | } | |
3492 | ||
f7725a48 MJ |
3493 | /* Get the overall limit oof growth based on parameters extracted from growth. |
3494 | it does not really make sense to mix functions with different overall growth | |
3495 | limits but it is possible and if it happens, we do not want to select one | |
3496 | limit at random. */ | |
3497 | ||
3498 | static long | |
3499 | get_max_overall_size (cgraph_node *node) | |
3500 | { | |
3501 | long max_new_size = orig_overall_size; | |
31584824 | 3502 | long large_unit = opt_for_fn (node->decl, param_ipa_cp_large_unit_insns); |
f7725a48 MJ |
3503 | if (max_new_size < large_unit) |
3504 | max_new_size = large_unit; | |
12122f94 | 3505 | int unit_growth = opt_for_fn (node->decl, param_ipa_cp_unit_growth); |
f7725a48 MJ |
3506 | max_new_size += max_new_size * unit_growth / 100 + 1; |
3507 | return max_new_size; | |
3508 | } | |
3509 | ||
310bc633 MJ |
3510 | /* Iterate over known values of parameters of NODE and estimate the local |
3511 | effects in terms of time and size they have. */ | |
3512 | ||
3513 | static void | |
3514 | estimate_local_effects (struct cgraph_node *node) | |
3515 | { | |
a4a3cdd0 | 3516 | ipa_node_params *info = ipa_node_params_sum->get (node); |
310bc633 | 3517 | int i, count = ipa_get_param_count (info); |
310bc633 | 3518 | bool always_const; |
310bc633 MJ |
3519 | int removable_params_cost; |
3520 | ||
3521 | if (!count || !ipcp_versionable_function_p (node)) | |
3522 | return; | |
3523 | ||
ca30a539 | 3524 | if (dump_file && (dump_flags & TDF_DETAILS)) |
464d0118 | 3525 | fprintf (dump_file, "\nEstimating effects for %s.\n", node->dump_name ()); |
310bc633 | 3526 | |
9d5af1db MJ |
3527 | ipa_auto_call_arg_values avals; |
3528 | always_const = gather_context_independent_values (info, &avals, true, | |
310bc633 | 3529 | &removable_params_cost); |
9d5af1db | 3530 | int devirt_bonus = devirtualization_time_bonus (node, &avals); |
dcf89d57 | 3531 | if (always_const || devirt_bonus |
87f94429 | 3532 | || (removable_params_cost && node->can_change_signature)) |
ca30a539 | 3533 | { |
310bc633 | 3534 | struct caller_statistics stats; |
1e7fdc02 | 3535 | ipa_call_estimates estimates; |
310bc633 MJ |
3536 | |
3537 | init_caller_stats (&stats); | |
d52f5295 ML |
3538 | node->call_for_symbol_thunks_and_aliases (gather_caller_stats, &stats, |
3539 | false); | |
1e7fdc02 MJ |
3540 | estimate_ipcp_clone_size_and_time (node, &avals, &estimates); |
3541 | sreal time = estimates.nonspecialized_time - estimates.time; | |
3542 | time += devirt_bonus; | |
3543 | time += hint_time_bonus (node, estimates); | |
3544 | time += removable_params_cost; | |
3545 | int size = estimates.size - stats.n_calls * removable_params_cost; | |
310bc633 MJ |
3546 | |
3547 | if (dump_file) | |
3548 | fprintf (dump_file, " - context independent values, size: %i, " | |
1e7fdc02 | 3549 | "time_benefit: %f\n", size, (time).to_double ()); |
310bc633 | 3550 | |
87f94429 | 3551 | if (size <= 0 || node->local) |
310bc633 | 3552 | { |
eb20b778 | 3553 | info->do_clone_for_all_contexts = true; |
310bc633 MJ |
3554 | |
3555 | if (dump_file) | |
3556 | fprintf (dump_file, " Decided to specialize for all " | |
3557 | "known contexts, code not going to grow.\n"); | |
3558 | } | |
b86aedb0 MJ |
3559 | else if (good_cloning_opportunity_p (node, time, stats.freq_sum, |
3560 | stats.count_sum, size)) | |
310bc633 | 3561 | { |
f7725a48 | 3562 | if (size + overall_size <= get_max_overall_size (node)) |
310bc633 | 3563 | { |
eb20b778 | 3564 | info->do_clone_for_all_contexts = true; |
310bc633 MJ |
3565 | overall_size += size; |
3566 | ||
3567 | if (dump_file) | |
3568 | fprintf (dump_file, " Decided to specialize for all " | |
91153e0a MJ |
3569 | "known contexts, growth (to %li) deemed " |
3570 | "beneficial.\n", overall_size); | |
310bc633 MJ |
3571 | } |
3572 | else if (dump_file && (dump_flags & TDF_DETAILS)) | |
f7725a48 MJ |
3573 | fprintf (dump_file, " Not cloning for all contexts because " |
3574 | "maximum unit size would be reached with %li.\n", | |
310bc633 MJ |
3575 | size + overall_size); |
3576 | } | |
5af56ae8 JH |
3577 | else if (dump_file && (dump_flags & TDF_DETAILS)) |
3578 | fprintf (dump_file, " Not cloning for all contexts because " | |
3579 | "!good_cloning_opportunity_p.\n"); | |
155c9907 | 3580 | |
ca30a539 JH |
3581 | } |
3582 | ||
155c9907 | 3583 | for (i = 0; i < count; i++) |
ca30a539 | 3584 | { |
99b1c316 | 3585 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 MJ |
3586 | ipcp_lattice<tree> *lat = &plats->itself; |
3587 | ipcp_value<tree> *val; | |
310bc633 MJ |
3588 | |
3589 | if (lat->bottom | |
3590 | || !lat->values | |
9d5af1db | 3591 | || avals.m_known_vals[i]) |
310bc633 MJ |
3592 | continue; |
3593 | ||
3594 | for (val = lat->values; val; val = val->next) | |
3595 | { | |
44210a96 | 3596 | gcc_checking_assert (TREE_CODE (val->value) != TREE_BINFO); |
9d5af1db | 3597 | avals.m_known_vals[i] = val->value; |
310bc633 | 3598 | |
44210a96 | 3599 | int emc = estimate_move_cost (TREE_TYPE (val->value), true); |
9d5af1db MJ |
3600 | perform_estimation_of_a_value (node, &avals, removable_params_cost, |
3601 | emc, val); | |
0318fc77 | 3602 | |
310bc633 MJ |
3603 | if (dump_file && (dump_flags & TDF_DETAILS)) |
3604 | { | |
3605 | fprintf (dump_file, " - estimates for value "); | |
3606 | print_ipcp_constant_value (dump_file, val->value); | |
0e8853ee JH |
3607 | fprintf (dump_file, " for "); |
3608 | ipa_dump_param (dump_file, info, i); | |
b86aedb0 MJ |
3609 | fprintf (dump_file, ": time_benefit: %g, size: %i\n", |
3610 | val->local_time_benefit.to_double (), | |
3611 | val->local_size_cost); | |
310bc633 | 3612 | } |
310bc633 | 3613 | } |
9d5af1db | 3614 | avals.m_known_vals[i] = NULL_TREE; |
2c9561b5 MJ |
3615 | } |
3616 | ||
44210a96 MJ |
3617 | for (i = 0; i < count; i++) |
3618 | { | |
99b1c316 | 3619 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
44210a96 MJ |
3620 | |
3621 | if (!plats->virt_call) | |
3622 | continue; | |
3623 | ||
3624 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; | |
3625 | ipcp_value<ipa_polymorphic_call_context> *val; | |
3626 | ||
3627 | if (ctxlat->bottom | |
3628 | || !ctxlat->values | |
9d5af1db | 3629 | || !avals.m_known_contexts[i].useless_p ()) |
44210a96 MJ |
3630 | continue; |
3631 | ||
3632 | for (val = ctxlat->values; val; val = val->next) | |
3633 | { | |
9d5af1db MJ |
3634 | avals.m_known_contexts[i] = val->value; |
3635 | perform_estimation_of_a_value (node, &avals, removable_params_cost, | |
3636 | 0, val); | |
44210a96 MJ |
3637 | |
3638 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3639 | { | |
3640 | fprintf (dump_file, " - estimates for polymorphic context "); | |
3641 | print_ipcp_constant_value (dump_file, val->value); | |
3642 | fprintf (dump_file, " for "); | |
3643 | ipa_dump_param (dump_file, info, i); | |
b86aedb0 MJ |
3644 | fprintf (dump_file, ": time_benefit: %g, size: %i\n", |
3645 | val->local_time_benefit.to_double (), | |
3646 | val->local_size_cost); | |
44210a96 MJ |
3647 | } |
3648 | } | |
9d5af1db | 3649 | avals.m_known_contexts[i] = ipa_polymorphic_call_context (); |
44210a96 MJ |
3650 | } |
3651 | ||
155c9907 | 3652 | for (i = 0; i < count; i++) |
2c9561b5 | 3653 | { |
99b1c316 | 3654 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
2c9561b5 MJ |
3655 | |
3656 | if (plats->aggs_bottom || !plats->aggs) | |
3657 | continue; | |
3658 | ||
9d5af1db MJ |
3659 | ipa_agg_value_set *agg = &avals.m_known_aggs[i]; |
3660 | for (ipcp_agg_lattice *aglat = plats->aggs; aglat; aglat = aglat->next) | |
2c9561b5 | 3661 | { |
c0cb5055 | 3662 | ipcp_value<tree> *val; |
2c9561b5 MJ |
3663 | if (aglat->bottom || !aglat->values |
3664 | /* If the following is true, the one value is in known_aggs. */ | |
3665 | || (!plats->aggs_contain_variable | |
c0cb5055 | 3666 | && aglat->is_single_const ())) |
2c9561b5 MJ |
3667 | continue; |
3668 | ||
3669 | for (val = aglat->values; val; val = val->next) | |
3670 | { | |
eb270950 | 3671 | struct ipa_agg_value item; |
2c9561b5 MJ |
3672 | |
3673 | item.offset = aglat->offset; | |
3674 | item.value = val->value; | |
eb270950 | 3675 | agg->items.safe_push (item); |
2c9561b5 | 3676 | |
9d5af1db | 3677 | perform_estimation_of_a_value (node, &avals, |
c0cb5055 | 3678 | removable_params_cost, 0, val); |
2c9561b5 MJ |
3679 | |
3680 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3681 | { | |
3682 | fprintf (dump_file, " - estimates for value "); | |
3683 | print_ipcp_constant_value (dump_file, val->value); | |
0e8853ee | 3684 | fprintf (dump_file, " for "); |
155c9907 | 3685 | ipa_dump_param (dump_file, info, i); |
2c9561b5 | 3686 | fprintf (dump_file, "[%soffset: " HOST_WIDE_INT_PRINT_DEC |
b86aedb0 | 3687 | "]: time_benefit: %g, size: %i\n", |
c0cb5055 MJ |
3688 | plats->aggs_by_ref ? "ref " : "", |
3689 | aglat->offset, | |
b86aedb0 MJ |
3690 | val->local_time_benefit.to_double (), |
3691 | val->local_size_cost); | |
2c9561b5 MJ |
3692 | } |
3693 | ||
eb270950 | 3694 | agg->items.pop (); |
2c9561b5 MJ |
3695 | } |
3696 | } | |
3697 | } | |
310bc633 MJ |
3698 | } |
3699 | ||
3700 | ||
3701 | /* Add value CUR_VAL and all yet-unsorted values it is dependent on to the | |
3702 | topological sort of values. */ | |
3703 | ||
c0cb5055 MJ |
3704 | template <typename valtype> |
3705 | void | |
3706 | value_topo_info<valtype>::add_val (ipcp_value<valtype> *cur_val) | |
310bc633 | 3707 | { |
c0cb5055 | 3708 | ipcp_value_source<valtype> *src; |
310bc633 MJ |
3709 | |
3710 | if (cur_val->dfs) | |
3711 | return; | |
3712 | ||
3713 | dfs_counter++; | |
3714 | cur_val->dfs = dfs_counter; | |
3715 | cur_val->low_link = dfs_counter; | |
3716 | ||
3717 | cur_val->topo_next = stack; | |
3718 | stack = cur_val; | |
3719 | cur_val->on_stack = true; | |
3720 | ||
3721 | for (src = cur_val->sources; src; src = src->next) | |
3722 | if (src->val) | |
3723 | { | |
3724 | if (src->val->dfs == 0) | |
3725 | { | |
c0cb5055 | 3726 | add_val (src->val); |
310bc633 MJ |
3727 | if (src->val->low_link < cur_val->low_link) |
3728 | cur_val->low_link = src->val->low_link; | |
3729 | } | |
3730 | else if (src->val->on_stack | |
3731 | && src->val->dfs < cur_val->low_link) | |
3732 | cur_val->low_link = src->val->dfs; | |
3733 | } | |
3734 | ||
3735 | if (cur_val->dfs == cur_val->low_link) | |
ca30a539 | 3736 | { |
c0cb5055 | 3737 | ipcp_value<valtype> *v, *scc_list = NULL; |
310bc633 MJ |
3738 | |
3739 | do | |
3740 | { | |
3741 | v = stack; | |
3742 | stack = v->topo_next; | |
3743 | v->on_stack = false; | |
ff2b92de | 3744 | v->scc_no = cur_val->dfs; |
310bc633 MJ |
3745 | |
3746 | v->scc_next = scc_list; | |
3747 | scc_list = v; | |
3748 | } | |
3749 | while (v != cur_val); | |
3750 | ||
3751 | cur_val->topo_next = values_topo; | |
3752 | values_topo = cur_val; | |
ca30a539 | 3753 | } |
518dc859 RL |
3754 | } |
3755 | ||
310bc633 MJ |
3756 | /* Add all values in lattices associated with NODE to the topological sort if |
3757 | they are not there yet. */ | |
3758 | ||
3759 | static void | |
c0cb5055 | 3760 | add_all_node_vals_to_toposort (cgraph_node *node, ipa_topo_info *topo) |
518dc859 | 3761 | { |
a4a3cdd0 | 3762 | ipa_node_params *info = ipa_node_params_sum->get (node); |
310bc633 MJ |
3763 | int i, count = ipa_get_param_count (info); |
3764 | ||
155c9907 | 3765 | for (i = 0; i < count; i++) |
310bc633 | 3766 | { |
99b1c316 | 3767 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 | 3768 | ipcp_lattice<tree> *lat = &plats->itself; |
2c9561b5 | 3769 | struct ipcp_agg_lattice *aglat; |
310bc633 | 3770 | |
2c9561b5 | 3771 | if (!lat->bottom) |
44210a96 MJ |
3772 | { |
3773 | ipcp_value<tree> *val; | |
3774 | for (val = lat->values; val; val = val->next) | |
3775 | topo->constants.add_val (val); | |
3776 | } | |
2c9561b5 MJ |
3777 | |
3778 | if (!plats->aggs_bottom) | |
3779 | for (aglat = plats->aggs; aglat; aglat = aglat->next) | |
3780 | if (!aglat->bottom) | |
44210a96 MJ |
3781 | { |
3782 | ipcp_value<tree> *val; | |
3783 | for (val = aglat->values; val; val = val->next) | |
3784 | topo->constants.add_val (val); | |
3785 | } | |
3786 | ||
3787 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; | |
3788 | if (!ctxlat->bottom) | |
3789 | { | |
3790 | ipcp_value<ipa_polymorphic_call_context> *ctxval; | |
3791 | for (ctxval = ctxlat->values; ctxval; ctxval = ctxval->next) | |
3792 | topo->contexts.add_val (ctxval); | |
3793 | } | |
310bc633 | 3794 | } |
518dc859 RL |
3795 | } |
3796 | ||
310bc633 MJ |
3797 | /* One pass of constants propagation along the call graph edges, from callers |
3798 | to callees (requires topological ordering in TOPO), iterate over strongly | |
3799 | connected components. */ | |
3800 | ||
518dc859 | 3801 | static void |
99b1c316 | 3802 | propagate_constants_topo (class ipa_topo_info *topo) |
518dc859 | 3803 | { |
310bc633 | 3804 | int i; |
518dc859 | 3805 | |
310bc633 | 3806 | for (i = topo->nnodes - 1; i >= 0; i--) |
518dc859 | 3807 | { |
39e87baf | 3808 | unsigned j; |
310bc633 | 3809 | struct cgraph_node *v, *node = topo->order[i]; |
d52f5295 | 3810 | vec<cgraph_node *> cycle_nodes = ipa_get_nodes_in_cycle (node); |
310bc633 | 3811 | |
310bc633 MJ |
3812 | /* First, iteratively propagate within the strongly connected component |
3813 | until all lattices stabilize. */ | |
39e87baf | 3814 | FOR_EACH_VEC_ELT (cycle_nodes, j, v) |
d52f5295 | 3815 | if (v->has_gimple_body_p ()) |
6cf67b62 | 3816 | { |
e72763e2 JH |
3817 | if (opt_for_fn (v->decl, flag_ipa_cp) |
3818 | && opt_for_fn (v->decl, optimize)) | |
6cf67b62 | 3819 | push_node_to_stack (topo, v); |
223f4b10 | 3820 | /* When V is not optimized, we can not push it to stack, but |
6cf67b62 JH |
3821 | still we need to set all its callees lattices to bottom. */ |
3822 | else | |
3823 | { | |
3824 | for (cgraph_edge *cs = v->callees; cs; cs = cs->next_callee) | |
3825 | propagate_constants_across_call (cs); | |
3826 | } | |
3827 | } | |
310bc633 | 3828 | |
39e87baf | 3829 | v = pop_node_from_stack (topo); |
310bc633 MJ |
3830 | while (v) |
3831 | { | |
3832 | struct cgraph_edge *cs; | |
9b14fc33 FX |
3833 | class ipa_node_params *info = NULL; |
3834 | bool self_scc = true; | |
310bc633 MJ |
3835 | |
3836 | for (cs = v->callees; cs; cs = cs->next_callee) | |
af21714c MJ |
3837 | if (ipa_edge_within_scc (cs)) |
3838 | { | |
9b14fc33 FX |
3839 | cgraph_node *callee = cs->callee->function_symbol (); |
3840 | ||
3841 | if (v != callee) | |
3842 | self_scc = false; | |
3843 | ||
3844 | if (!info) | |
3845 | { | |
a4a3cdd0 | 3846 | info = ipa_node_params_sum->get (v); |
9b14fc33 FX |
3847 | info->node_within_scc = true; |
3848 | } | |
3849 | ||
155c9907 | 3850 | if (propagate_constants_across_call (cs)) |
9b14fc33 | 3851 | push_node_to_stack (topo, callee); |
af21714c | 3852 | } |
9b14fc33 FX |
3853 | |
3854 | if (info) | |
3855 | info->node_is_self_scc = self_scc; | |
3856 | ||
310bc633 MJ |
3857 | v = pop_node_from_stack (topo); |
3858 | } | |
3859 | ||
3860 | /* Afterwards, propagate along edges leading out of the SCC, calculates | |
3861 | the local effects of the discovered constants and all valid values to | |
3862 | their topological sort. */ | |
39e87baf | 3863 | FOR_EACH_VEC_ELT (cycle_nodes, j, v) |
6cf67b62 | 3864 | if (v->has_gimple_body_p () |
e72763e2 JH |
3865 | && opt_for_fn (v->decl, flag_ipa_cp) |
3866 | && opt_for_fn (v->decl, optimize)) | |
39e87baf MJ |
3867 | { |
3868 | struct cgraph_edge *cs; | |
310bc633 | 3869 | |
39e87baf | 3870 | estimate_local_effects (v); |
c0cb5055 | 3871 | add_all_node_vals_to_toposort (v, topo); |
39e87baf | 3872 | for (cs = v->callees; cs; cs = cs->next_callee) |
4cb13597 | 3873 | if (!ipa_edge_within_scc (cs)) |
155c9907 | 3874 | propagate_constants_across_call (cs); |
39e87baf MJ |
3875 | } |
3876 | cycle_nodes.release (); | |
518dc859 RL |
3877 | } |
3878 | } | |
3879 | ||
310bc633 | 3880 | /* Propagate the estimated effects of individual values along the topological |
073a8998 | 3881 | from the dependent values to those they depend on. */ |
310bc633 | 3882 | |
c0cb5055 MJ |
3883 | template <typename valtype> |
3884 | void | |
3885 | value_topo_info<valtype>::propagate_effects () | |
518dc859 | 3886 | { |
c0cb5055 | 3887 | ipcp_value<valtype> *base; |
a6a0db7d | 3888 | hash_set<ipcp_value<valtype> *> processed_srcvals; |
518dc859 | 3889 | |
310bc633 | 3890 | for (base = values_topo; base; base = base->topo_next) |
518dc859 | 3891 | { |
c0cb5055 MJ |
3892 | ipcp_value_source<valtype> *src; |
3893 | ipcp_value<valtype> *val; | |
b86aedb0 | 3894 | sreal time = 0; |
a6a0db7d | 3895 | HOST_WIDE_INT size = 0; |
310bc633 MJ |
3896 | |
3897 | for (val = base; val; val = val->scc_next) | |
3898 | { | |
b86aedb0 | 3899 | time = time + val->local_time_benefit + val->prop_time_benefit; |
a6a0db7d | 3900 | size = size + val->local_size_cost + val->prop_size_cost; |
310bc633 MJ |
3901 | } |
3902 | ||
3903 | for (val = base; val; val = val->scc_next) | |
a6a0db7d MJ |
3904 | { |
3905 | processed_srcvals.empty (); | |
3906 | for (src = val->sources; src; src = src->next) | |
3907 | if (src->val | |
3908 | && src->cs->maybe_hot_p ()) | |
3909 | { | |
3910 | if (!processed_srcvals.add (src->val)) | |
3911 | { | |
3912 | HOST_WIDE_INT prop_size = size + src->val->prop_size_cost; | |
3913 | if (prop_size < INT_MAX) | |
3914 | src->val->prop_size_cost = prop_size; | |
3915 | else | |
3916 | continue; | |
3917 | } | |
ff2b92de MJ |
3918 | |
3919 | int special_factor = 1; | |
3920 | if (val->same_scc (src->val)) | |
3921 | special_factor | |
3922 | = opt_for_fn(src->cs->caller->decl, | |
3923 | param_ipa_cp_recursive_freq_factor); | |
3924 | else if (val->self_recursion_generated_p () | |
3925 | && (src->cs->callee->function_symbol () | |
3926 | == src->cs->caller)) | |
3927 | { | |
3928 | int max_recur_gen_depth | |
3929 | = opt_for_fn(src->cs->caller->decl, | |
3930 | param_ipa_cp_max_recursive_depth); | |
3931 | special_factor = max_recur_gen_depth | |
3932 | - val->self_recursion_generated_level + 1; | |
3933 | } | |
3934 | ||
a6a0db7d | 3935 | src->val->prop_time_benefit |
ff2b92de | 3936 | += time * special_factor * src->cs->sreal_frequency (); |
a6a0db7d MJ |
3937 | } |
3938 | ||
3939 | if (size < INT_MAX) | |
310bc633 | 3940 | { |
a6a0db7d MJ |
3941 | val->prop_time_benefit = time; |
3942 | val->prop_size_cost = size; | |
310bc633 | 3943 | } |
a6a0db7d MJ |
3944 | else |
3945 | { | |
3946 | val->prop_time_benefit = 0; | |
3947 | val->prop_size_cost = 0; | |
3948 | } | |
3949 | } | |
518dc859 RL |
3950 | } |
3951 | } | |
3952 | ||
ab100825 MJ |
3953 | /* Callback for qsort to sort counts of all edges. */ |
3954 | ||
3955 | static int | |
3956 | compare_edge_profile_counts (const void *a, const void *b) | |
3957 | { | |
3958 | const profile_count *cnt1 = (const profile_count *) a; | |
3959 | const profile_count *cnt2 = (const profile_count *) b; | |
3960 | ||
3961 | if (*cnt1 < *cnt2) | |
3962 | return 1; | |
3963 | if (*cnt1 > *cnt2) | |
3964 | return -1; | |
3965 | return 0; | |
3966 | } | |
3967 | ||
310bc633 | 3968 | |
44210a96 MJ |
3969 | /* Propagate constants, polymorphic contexts and their effects from the |
3970 | summaries interprocedurally. */ | |
310bc633 | 3971 | |
518dc859 | 3972 | static void |
99b1c316 | 3973 | ipcp_propagate_stage (class ipa_topo_info *topo) |
518dc859 RL |
3974 | { |
3975 | struct cgraph_node *node; | |
518dc859 | 3976 | |
310bc633 MJ |
3977 | if (dump_file) |
3978 | fprintf (dump_file, "\n Propagating constants:\n\n"); | |
3979 | ||
ab100825 | 3980 | base_count = profile_count::uninitialized (); |
e7a74006 | 3981 | |
ab100825 MJ |
3982 | bool compute_count_base = false; |
3983 | unsigned base_count_pos_percent = 0; | |
310bc633 MJ |
3984 | FOR_EACH_DEFINED_FUNCTION (node) |
3985 | { | |
e72763e2 JH |
3986 | if (node->has_gimple_body_p () |
3987 | && opt_for_fn (node->decl, flag_ipa_cp) | |
3988 | && opt_for_fn (node->decl, optimize)) | |
310bc633 | 3989 | { |
a4a3cdd0 | 3990 | ipa_node_params *info = ipa_node_params_sum->get (node); |
6cf67b62 | 3991 | determine_versionability (node, info); |
4ba9fb0a AH |
3992 | |
3993 | unsigned nlattices = ipa_get_param_count (info); | |
3994 | void *chunk = XCNEWVEC (class ipcp_param_lattices, nlattices); | |
3995 | info->lattices = new (chunk) ipcp_param_lattices[nlattices]; | |
310bc633 MJ |
3996 | initialize_node_lattices (node); |
3997 | } | |
f658ad30 | 3998 | ipa_size_summary *s = ipa_size_summaries->get (node); |
56f62793 ML |
3999 | if (node->definition && !node->alias && s != NULL) |
4000 | overall_size += s->self_size; | |
ab100825 MJ |
4001 | if (node->count.ipa ().initialized_p ()) |
4002 | { | |
4003 | compute_count_base = true; | |
4004 | unsigned pos_percent = opt_for_fn (node->decl, | |
4005 | param_ipa_cp_profile_count_base); | |
4006 | base_count_pos_percent = MAX (base_count_pos_percent, pos_percent); | |
4007 | } | |
310bc633 MJ |
4008 | } |
4009 | ||
ab100825 MJ |
4010 | if (compute_count_base) |
4011 | { | |
4012 | auto_vec<profile_count> all_edge_counts; | |
4013 | all_edge_counts.reserve_exact (symtab->edges_count); | |
4014 | FOR_EACH_DEFINED_FUNCTION (node) | |
4015 | for (cgraph_edge *cs = node->callees; cs; cs = cs->next_callee) | |
4016 | { | |
4017 | profile_count count = cs->count.ipa (); | |
4018 | if (!(count > profile_count::zero ())) | |
4019 | continue; | |
4020 | ||
4021 | enum availability avail; | |
4022 | cgraph_node *tgt | |
4023 | = cs->callee->function_or_virtual_thunk_symbol (&avail); | |
4024 | ipa_node_params *info = ipa_node_params_sum->get (tgt); | |
4025 | if (info && info->versionable) | |
4026 | all_edge_counts.quick_push (count); | |
4027 | } | |
4028 | ||
4029 | if (!all_edge_counts.is_empty ()) | |
4030 | { | |
4031 | gcc_assert (base_count_pos_percent <= 100); | |
4032 | all_edge_counts.qsort (compare_edge_profile_counts); | |
4033 | ||
4034 | unsigned base_count_pos | |
4035 | = ((all_edge_counts.length () * (base_count_pos_percent)) / 100); | |
4036 | base_count = all_edge_counts[base_count_pos]; | |
4037 | ||
4038 | if (dump_file) | |
4039 | { | |
4040 | fprintf (dump_file, "\nSelected base_count from %u edges at " | |
4041 | "position %u, arriving at: ", all_edge_counts.length (), | |
4042 | base_count_pos); | |
4043 | base_count.dump (dump_file); | |
4044 | fprintf (dump_file, "\n"); | |
4045 | } | |
4046 | } | |
4047 | else if (dump_file) | |
4048 | fprintf (dump_file, "\nNo candidates with non-zero call count found, " | |
4049 | "continuing as if without profile feedback.\n"); | |
4050 | } | |
4051 | ||
f7725a48 | 4052 | orig_overall_size = overall_size; |
310bc633 MJ |
4053 | |
4054 | if (dump_file) | |
f7725a48 | 4055 | fprintf (dump_file, "\noverall_size: %li\n", overall_size); |
310bc633 MJ |
4056 | |
4057 | propagate_constants_topo (topo); | |
b2b29377 MM |
4058 | if (flag_checking) |
4059 | ipcp_verify_propagated_values (); | |
c0cb5055 | 4060 | topo->constants.propagate_effects (); |
44210a96 | 4061 | topo->contexts.propagate_effects (); |
310bc633 MJ |
4062 | |
4063 | if (dump_file) | |
4064 | { | |
4065 | fprintf (dump_file, "\nIPA lattices after all propagation:\n"); | |
4066 | print_all_lattices (dump_file, (dump_flags & TDF_DETAILS), true); | |
4067 | } | |
4068 | } | |
4069 | ||
4070 | /* Discover newly direct outgoing edges from NODE which is a new clone with | |
44210a96 | 4071 | known KNOWN_CSTS and make them direct. */ |
310bc633 MJ |
4072 | |
4073 | static void | |
4074 | ipcp_discover_new_direct_edges (struct cgraph_node *node, | |
44210a96 MJ |
4075 | vec<tree> known_csts, |
4076 | vec<ipa_polymorphic_call_context> | |
4077 | known_contexts, | |
162712de | 4078 | struct ipa_agg_replacement_value *aggvals) |
310bc633 MJ |
4079 | { |
4080 | struct cgraph_edge *ie, *next_ie; | |
0f378cb5 | 4081 | bool found = false; |
310bc633 MJ |
4082 | |
4083 | for (ie = node->indirect_calls; ie; ie = next_ie) | |
4084 | { | |
81fa35bd | 4085 | tree target; |
231b4916 | 4086 | bool speculative; |
310bc633 MJ |
4087 | |
4088 | next_ie = ie->next_callee; | |
44210a96 | 4089 | target = ipa_get_indirect_edge_target_1 (ie, known_csts, known_contexts, |
231b4916 | 4090 | vNULL, aggvals, &speculative); |
310bc633 | 4091 | if (target) |
0f378cb5 | 4092 | { |
042ae7d2 JH |
4093 | bool agg_contents = ie->indirect_info->agg_contents; |
4094 | bool polymorphic = ie->indirect_info->polymorphic; | |
a4e33812 | 4095 | int param_index = ie->indirect_info->param_index; |
231b4916 JH |
4096 | struct cgraph_edge *cs = ipa_make_edge_direct_to_target (ie, target, |
4097 | speculative); | |
0f378cb5 | 4098 | found = true; |
4502fe8d | 4099 | |
042ae7d2 | 4100 | if (cs && !agg_contents && !polymorphic) |
4502fe8d | 4101 | { |
a4a3cdd0 | 4102 | ipa_node_params *info = ipa_node_params_sum->get (node); |
4502fe8d | 4103 | int c = ipa_get_controlled_uses (info, param_index); |
13586172 MJ |
4104 | if (c != IPA_UNDESCRIBED_USE |
4105 | && !ipa_get_param_load_dereferenced (info, param_index)) | |
4502fe8d MJ |
4106 | { |
4107 | struct ipa_ref *to_del; | |
4108 | ||
4109 | c--; | |
4110 | ipa_set_controlled_uses (info, param_index, c); | |
4111 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
4112 | fprintf (dump_file, " controlled uses count of param " | |
4113 | "%i bumped down to %i\n", param_index, c); | |
4114 | if (c == 0 | |
d122681a | 4115 | && (to_del = node->find_reference (cs->callee, NULL, 0))) |
4502fe8d MJ |
4116 | { |
4117 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
4118 | fprintf (dump_file, " and even removing its " | |
4119 | "cloning-created reference\n"); | |
d122681a | 4120 | to_del->remove_reference (); |
4502fe8d MJ |
4121 | } |
4122 | } | |
4123 | } | |
0f378cb5 | 4124 | } |
310bc633 | 4125 | } |
0f378cb5 JH |
4126 | /* Turning calls to direct calls will improve overall summary. */ |
4127 | if (found) | |
0bceb671 | 4128 | ipa_update_overall_fn_summary (node); |
310bc633 MJ |
4129 | } |
4130 | ||
1ac2bdb4 ML |
4131 | class edge_clone_summary; |
4132 | static call_summary <edge_clone_summary *> *edge_clone_summaries = NULL; | |
310bc633 | 4133 | |
1ac2bdb4 | 4134 | /* Edge clone summary. */ |
310bc633 | 4135 | |
6c1dae73 | 4136 | class edge_clone_summary |
310bc633 | 4137 | { |
6c1dae73 | 4138 | public: |
1ac2bdb4 ML |
4139 | /* Default constructor. */ |
4140 | edge_clone_summary (): prev_clone (NULL), next_clone (NULL) {} | |
aef83682 | 4141 | |
1ac2bdb4 ML |
4142 | /* Default destructor. */ |
4143 | ~edge_clone_summary () | |
4144 | { | |
4145 | if (prev_clone) | |
4146 | edge_clone_summaries->get (prev_clone)->next_clone = next_clone; | |
4147 | if (next_clone) | |
4148 | edge_clone_summaries->get (next_clone)->prev_clone = prev_clone; | |
4149 | } | |
310bc633 | 4150 | |
1ac2bdb4 ML |
4151 | cgraph_edge *prev_clone; |
4152 | cgraph_edge *next_clone; | |
4153 | }; | |
aef83682 | 4154 | |
1ac2bdb4 ML |
4155 | class edge_clone_summary_t: |
4156 | public call_summary <edge_clone_summary *> | |
aef83682 | 4157 | { |
1ac2bdb4 ML |
4158 | public: |
4159 | edge_clone_summary_t (symbol_table *symtab): | |
4160 | call_summary <edge_clone_summary *> (symtab) | |
4161 | { | |
4162 | m_initialize_when_cloning = true; | |
4163 | } | |
aef83682 | 4164 | |
1ac2bdb4 ML |
4165 | virtual void duplicate (cgraph_edge *src_edge, cgraph_edge *dst_edge, |
4166 | edge_clone_summary *src_data, | |
4167 | edge_clone_summary *dst_data); | |
4168 | }; | |
4169 | ||
4170 | /* Edge duplication hook. */ | |
4171 | ||
4172 | void | |
4173 | edge_clone_summary_t::duplicate (cgraph_edge *src_edge, cgraph_edge *dst_edge, | |
4174 | edge_clone_summary *src_data, | |
4175 | edge_clone_summary *dst_data) | |
4176 | { | |
4177 | if (src_data->next_clone) | |
4178 | edge_clone_summaries->get (src_data->next_clone)->prev_clone = dst_edge; | |
4179 | dst_data->prev_clone = src_edge; | |
4180 | dst_data->next_clone = src_data->next_clone; | |
4181 | src_data->next_clone = dst_edge; | |
aef83682 MJ |
4182 | } |
4183 | ||
cfeef9ac MJ |
4184 | /* Return true is CS calls DEST or its clone for all contexts. When |
4185 | ALLOW_RECURSION_TO_CLONE is false, also return false for self-recursive | |
4186 | edges from/to an all-context clone. */ | |
310bc633 MJ |
4187 | |
4188 | static bool | |
cfeef9ac MJ |
4189 | calls_same_node_or_its_all_contexts_clone_p (cgraph_edge *cs, cgraph_node *dest, |
4190 | bool allow_recursion_to_clone) | |
47f4756e | 4191 | { |
cfeef9ac MJ |
4192 | enum availability availability; |
4193 | cgraph_node *callee = cs->callee->function_symbol (&availability); | |
4194 | ||
4195 | if (availability <= AVAIL_INTERPOSABLE) | |
4196 | return false; | |
4197 | if (callee == dest) | |
47f4756e | 4198 | return true; |
cfeef9ac MJ |
4199 | if (!allow_recursion_to_clone && cs->caller == callee) |
4200 | return false; | |
47f4756e | 4201 | |
a4a3cdd0 | 4202 | ipa_node_params *info = ipa_node_params_sum->get (callee); |
47f4756e MJ |
4203 | return info->is_all_contexts_clone && info->ipcp_orig_node == dest; |
4204 | } | |
4205 | ||
7b668576 MJ |
4206 | /* Return true if edge CS does bring about the value described by SRC to |
4207 | DEST_VAL of node DEST or its clone for all contexts. */ | |
47f4756e MJ |
4208 | |
4209 | static bool | |
4210 | cgraph_edge_brings_value_p (cgraph_edge *cs, ipcp_value_source<tree> *src, | |
7b668576 | 4211 | cgraph_node *dest, ipcp_value<tree> *dest_val) |
310bc633 | 4212 | { |
a4a3cdd0 | 4213 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
310bc633 | 4214 | |
cfeef9ac | 4215 | if (!calls_same_node_or_its_all_contexts_clone_p (cs, dest, !src->val) |
310bc633 MJ |
4216 | || caller_info->node_dead) |
4217 | return false; | |
2f1f3ac4 MJ |
4218 | |
4219 | if (!src->val) | |
310bc633 MJ |
4220 | return true; |
4221 | ||
4222 | if (caller_info->ipcp_orig_node) | |
4223 | { | |
2c9561b5 MJ |
4224 | tree t; |
4225 | if (src->offset == -1) | |
44210a96 | 4226 | t = caller_info->known_csts[src->index]; |
2c9561b5 MJ |
4227 | else |
4228 | t = get_clone_agg_value (cs->caller, src->offset, src->index); | |
310bc633 MJ |
4229 | return (t != NULL_TREE |
4230 | && values_equal_for_ipcp_p (src->val->value, t)); | |
4231 | } | |
4232 | else | |
518dc859 | 4233 | { |
2f1f3ac4 MJ |
4234 | if (src->val == dest_val) |
4235 | return true; | |
4236 | ||
2c9561b5 | 4237 | struct ipcp_agg_lattice *aglat; |
99b1c316 | 4238 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (caller_info, |
2c9561b5 MJ |
4239 | src->index); |
4240 | if (src->offset == -1) | |
c0cb5055 | 4241 | return (plats->itself.is_single_const () |
2c9561b5 MJ |
4242 | && values_equal_for_ipcp_p (src->val->value, |
4243 | plats->itself.values->value)); | |
310bc633 | 4244 | else |
2c9561b5 MJ |
4245 | { |
4246 | if (plats->aggs_bottom || plats->aggs_contain_variable) | |
4247 | return false; | |
4248 | for (aglat = plats->aggs; aglat; aglat = aglat->next) | |
4249 | if (aglat->offset == src->offset) | |
c0cb5055 | 4250 | return (aglat->is_single_const () |
2c9561b5 MJ |
4251 | && values_equal_for_ipcp_p (src->val->value, |
4252 | aglat->values->value)); | |
4253 | } | |
4254 | return false; | |
310bc633 MJ |
4255 | } |
4256 | } | |
4257 | ||
7b668576 MJ |
4258 | /* Return true if edge CS does bring about the value described by SRC to |
4259 | DST_VAL of node DEST or its clone for all contexts. */ | |
44210a96 MJ |
4260 | |
4261 | static bool | |
47f4756e MJ |
4262 | cgraph_edge_brings_value_p (cgraph_edge *cs, |
4263 | ipcp_value_source<ipa_polymorphic_call_context> *src, | |
7b668576 MJ |
4264 | cgraph_node *dest, |
4265 | ipcp_value<ipa_polymorphic_call_context> *) | |
44210a96 | 4266 | { |
a4a3cdd0 | 4267 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
44210a96 | 4268 | |
cfeef9ac | 4269 | if (!calls_same_node_or_its_all_contexts_clone_p (cs, dest, true) |
44210a96 MJ |
4270 | || caller_info->node_dead) |
4271 | return false; | |
4272 | if (!src->val) | |
4273 | return true; | |
4274 | ||
4275 | if (caller_info->ipcp_orig_node) | |
4276 | return (caller_info->known_contexts.length () > (unsigned) src->index) | |
4277 | && values_equal_for_ipcp_p (src->val->value, | |
4278 | caller_info->known_contexts[src->index]); | |
4279 | ||
99b1c316 | 4280 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (caller_info, |
44210a96 MJ |
4281 | src->index); |
4282 | return plats->ctxlat.is_single_const () | |
4283 | && values_equal_for_ipcp_p (src->val->value, | |
4284 | plats->ctxlat.values->value); | |
4285 | } | |
4286 | ||
2c9561b5 MJ |
4287 | /* Get the next clone in the linked list of clones of an edge. */ |
4288 | ||
4289 | static inline struct cgraph_edge * | |
4290 | get_next_cgraph_edge_clone (struct cgraph_edge *cs) | |
4291 | { | |
1ac2bdb4 ML |
4292 | edge_clone_summary *s = edge_clone_summaries->get (cs); |
4293 | return s != NULL ? s->next_clone : NULL; | |
2c9561b5 MJ |
4294 | } |
4295 | ||
7b668576 MJ |
4296 | /* Given VAL that is intended for DEST, iterate over all its sources and if any |
4297 | of them is viable and hot, return true. In that case, for those that still | |
d1e2e4f9 MJ |
4298 | hold, add their edge frequency and their number and cumulative profile |
4299 | counts of self-ecursive and other edges into *FREQUENCY, *CALLER_COUNT, | |
4300 | REC_COUNT_SUM and NONREC_COUNT_SUM respectively. */ | |
310bc633 | 4301 | |
c0cb5055 | 4302 | template <typename valtype> |
310bc633 | 4303 | static bool |
47f4756e | 4304 | get_info_about_necessary_edges (ipcp_value<valtype> *val, cgraph_node *dest, |
d1e2e4f9 MJ |
4305 | sreal *freq_sum, int *caller_count, |
4306 | profile_count *rec_count_sum, | |
4307 | profile_count *nonrec_count_sum) | |
310bc633 | 4308 | { |
c0cb5055 | 4309 | ipcp_value_source<valtype> *src; |
b86aedb0 MJ |
4310 | sreal freq = 0; |
4311 | int count = 0; | |
d1e2e4f9 MJ |
4312 | profile_count rec_cnt = profile_count::zero (); |
4313 | profile_count nonrec_cnt = profile_count::zero (); | |
310bc633 | 4314 | bool hot = false; |
7b668576 | 4315 | bool non_self_recursive = false; |
310bc633 MJ |
4316 | |
4317 | for (src = val->sources; src; src = src->next) | |
4318 | { | |
4319 | struct cgraph_edge *cs = src->cs; | |
4320 | while (cs) | |
518dc859 | 4321 | { |
7b668576 | 4322 | if (cgraph_edge_brings_value_p (cs, src, dest, val)) |
310bc633 MJ |
4323 | { |
4324 | count++; | |
b86aedb0 | 4325 | freq += cs->sreal_frequency (); |
3dafb85c | 4326 | hot |= cs->maybe_hot_p (); |
7b668576 | 4327 | if (cs->caller != dest) |
d1e2e4f9 MJ |
4328 | { |
4329 | non_self_recursive = true; | |
4330 | if (cs->count.ipa ().initialized_p ()) | |
4331 | rec_cnt += cs->count.ipa (); | |
4332 | } | |
4333 | else if (cs->count.ipa ().initialized_p ()) | |
4334 | nonrec_cnt += cs->count.ipa (); | |
310bc633 MJ |
4335 | } |
4336 | cs = get_next_cgraph_edge_clone (cs); | |
518dc859 RL |
4337 | } |
4338 | } | |
310bc633 | 4339 | |
7b668576 MJ |
4340 | /* If the only edges bringing a value are self-recursive ones, do not bother |
4341 | evaluating it. */ | |
4342 | if (!non_self_recursive) | |
4343 | return false; | |
4344 | ||
310bc633 | 4345 | *freq_sum = freq; |
310bc633 | 4346 | *caller_count = count; |
d1e2e4f9 MJ |
4347 | *rec_count_sum = rec_cnt; |
4348 | *nonrec_count_sum = nonrec_cnt; | |
9b14fc33 | 4349 | |
a4a3cdd0 | 4350 | if (!hot && ipa_node_params_sum->get (dest)->node_within_scc) |
9b14fc33 FX |
4351 | { |
4352 | struct cgraph_edge *cs; | |
4353 | ||
4354 | /* Cold non-SCC source edge could trigger hot recursive execution of | |
4355 | function. Consider the case as hot and rely on following cost model | |
4356 | computation to further select right one. */ | |
4357 | for (cs = dest->callers; cs; cs = cs->next_caller) | |
4358 | if (cs->caller == dest && cs->maybe_hot_p ()) | |
4359 | return true; | |
4360 | } | |
4361 | ||
310bc633 | 4362 | return hot; |
518dc859 RL |
4363 | } |
4364 | ||
a0f6a8cb FX |
4365 | /* Given a NODE, and a set of its CALLERS, try to adjust order of the callers |
4366 | to let a non-self-recursive caller be the first element. Thus, we can | |
4367 | simplify intersecting operations on values that arrive from all of these | |
4368 | callers, especially when there exists self-recursive call. Return true if | |
4369 | this kind of adjustment is possible. */ | |
4370 | ||
4371 | static bool | |
00dcc88a | 4372 | adjust_callers_for_value_intersection (vec<cgraph_edge *> &callers, |
a0f6a8cb FX |
4373 | cgraph_node *node) |
4374 | { | |
4375 | for (unsigned i = 0; i < callers.length (); i++) | |
4376 | { | |
4377 | cgraph_edge *cs = callers[i]; | |
4378 | ||
4379 | if (cs->caller != node) | |
4380 | { | |
4381 | if (i > 0) | |
4382 | { | |
4383 | callers[i] = callers[0]; | |
4384 | callers[0] = cs; | |
4385 | } | |
4386 | return true; | |
4387 | } | |
4388 | } | |
4389 | return false; | |
4390 | } | |
4391 | ||
47f4756e MJ |
4392 | /* Return a vector of incoming edges that do bring value VAL to node DEST. It |
4393 | is assumed their number is known and equal to CALLER_COUNT. */ | |
310bc633 | 4394 | |
c0cb5055 | 4395 | template <typename valtype> |
d52f5295 | 4396 | static vec<cgraph_edge *> |
47f4756e MJ |
4397 | gather_edges_for_value (ipcp_value<valtype> *val, cgraph_node *dest, |
4398 | int caller_count) | |
518dc859 | 4399 | { |
c0cb5055 | 4400 | ipcp_value_source<valtype> *src; |
d52f5295 | 4401 | vec<cgraph_edge *> ret; |
310bc633 | 4402 | |
9771b263 | 4403 | ret.create (caller_count); |
310bc633 MJ |
4404 | for (src = val->sources; src; src = src->next) |
4405 | { | |
4406 | struct cgraph_edge *cs = src->cs; | |
4407 | while (cs) | |
4408 | { | |
7b668576 | 4409 | if (cgraph_edge_brings_value_p (cs, src, dest, val)) |
9771b263 | 4410 | ret.quick_push (cs); |
310bc633 MJ |
4411 | cs = get_next_cgraph_edge_clone (cs); |
4412 | } | |
4413 | } | |
4414 | ||
a0f6a8cb FX |
4415 | if (caller_count > 1) |
4416 | adjust_callers_for_value_intersection (ret, dest); | |
4417 | ||
310bc633 | 4418 | return ret; |
518dc859 RL |
4419 | } |
4420 | ||
310bc633 | 4421 | /* Construct a replacement map for a know VALUE for a formal parameter PARAM. |
13586172 MJ |
4422 | Return it or NULL if for some reason it cannot be created. FORCE_LOAD_REF |
4423 | should be set to true when the reference created for the constant should be | |
4424 | a load one and not an address one because the corresponding parameter p is | |
4425 | only used as *p. */ | |
310bc633 | 4426 | |
518dc859 | 4427 | static struct ipa_replace_map * |
13586172 MJ |
4428 | get_replacement_map (class ipa_node_params *info, tree value, int parm_num, |
4429 | bool force_load_ref) | |
518dc859 RL |
4430 | { |
4431 | struct ipa_replace_map *replace_map; | |
518dc859 | 4432 | |
766090c2 | 4433 | replace_map = ggc_alloc<ipa_replace_map> (); |
c6f7cfc1 JH |
4434 | if (dump_file) |
4435 | { | |
0e8853ee JH |
4436 | fprintf (dump_file, " replacing "); |
4437 | ipa_dump_param (dump_file, info, parm_num); | |
155c9907 | 4438 | |
c6f7cfc1 | 4439 | fprintf (dump_file, " with const "); |
ef6cb4c7 | 4440 | print_generic_expr (dump_file, value); |
13586172 MJ |
4441 | |
4442 | if (force_load_ref) | |
4443 | fprintf (dump_file, " - forcing load reference\n"); | |
4444 | else | |
4445 | fprintf (dump_file, "\n"); | |
c6f7cfc1 | 4446 | } |
49bde175 | 4447 | replace_map->parm_num = parm_num; |
310bc633 | 4448 | replace_map->new_tree = value; |
13586172 | 4449 | replace_map->force_load_ref = force_load_ref; |
518dc859 RL |
4450 | return replace_map; |
4451 | } | |
4452 | ||
d1e2e4f9 MJ |
4453 | /* Dump new profiling counts of NODE. SPEC is true when NODE is a specialzied |
4454 | one, otherwise it will be referred to as the original node. */ | |
518dc859 | 4455 | |
518dc859 | 4456 | static void |
d1e2e4f9 | 4457 | dump_profile_updates (cgraph_node *node, bool spec) |
518dc859 | 4458 | { |
d1e2e4f9 MJ |
4459 | if (spec) |
4460 | fprintf (dump_file, " setting count of the specialized node %s to ", | |
4461 | node->dump_name ()); | |
4462 | else | |
4463 | fprintf (dump_file, " setting count of the original node %s to ", | |
4464 | node->dump_name ()); | |
518dc859 | 4465 | |
d1e2e4f9 | 4466 | node->count.dump (dump_file); |
3995f3a2 | 4467 | fprintf (dump_file, "\n"); |
d1e2e4f9 | 4468 | for (cgraph_edge *cs = node->callees; cs; cs = cs->next_callee) |
3995f3a2 | 4469 | { |
d1e2e4f9 | 4470 | fprintf (dump_file, " edge to %s has count ", |
3629ff8a | 4471 | cs->callee->dump_name ()); |
3995f3a2 JH |
4472 | cs->count.dump (dump_file); |
4473 | fprintf (dump_file, "\n"); | |
4474 | } | |
d1e2e4f9 | 4475 | } |
310bc633 | 4476 | |
d1e2e4f9 MJ |
4477 | /* With partial train run we do not want to assume that original's count is |
4478 | zero whenever we redurect all executed edges to clone. Simply drop profile | |
4479 | to local one in this case. In eany case, return the new value. ORIG_NODE | |
4480 | is the original node and its count has not been updaed yet. */ | |
4481 | ||
4482 | profile_count | |
4483 | lenient_count_portion_handling (profile_count remainder, cgraph_node *orig_node) | |
4484 | { | |
4485 | if (remainder.ipa_p () && !remainder.ipa ().nonzero_p () | |
4486 | && orig_node->count.ipa_p () && orig_node->count.ipa ().nonzero_p () | |
4487 | && opt_for_fn (orig_node->decl, flag_profile_partial_training)) | |
4488 | remainder = remainder.guessed_local (); | |
4489 | ||
4490 | return remainder; | |
4491 | } | |
4492 | ||
4493 | /* Structure to sum counts coming from nodes other than the original node and | |
4494 | its clones. */ | |
4495 | ||
4496 | struct gather_other_count_struct | |
4497 | { | |
4498 | cgraph_node *orig; | |
4499 | profile_count other_count; | |
4500 | }; | |
4501 | ||
4502 | /* Worker callback of call_for_symbol_thunks_and_aliases summing the number of | |
4503 | counts that come from non-self-recursive calls.. */ | |
4504 | ||
4505 | static bool | |
4506 | gather_count_of_non_rec_edges (cgraph_node *node, void *data) | |
4507 | { | |
4508 | gather_other_count_struct *desc = (gather_other_count_struct *) data; | |
4509 | for (cgraph_edge *cs = node->callers; cs; cs = cs->next_caller) | |
4510 | if (cs->caller != desc->orig && cs->caller->clone_of != desc->orig) | |
4511 | desc->other_count += cs->count.ipa (); | |
4512 | return false; | |
4513 | } | |
4514 | ||
4515 | /* Structure to help analyze if we need to boost counts of some clones of some | |
4516 | non-recursive edges to match the new callee count. */ | |
4517 | ||
4518 | struct desc_incoming_count_struct | |
4519 | { | |
4520 | cgraph_node *orig; | |
4521 | hash_set <cgraph_edge *> *processed_edges; | |
4522 | profile_count count; | |
4523 | unsigned unproc_orig_rec_edges; | |
4524 | }; | |
4525 | ||
4526 | /* Go over edges calling NODE and its thunks and gather information about | |
4527 | incoming counts so that we know if we need to make any adjustments. */ | |
4528 | ||
4529 | static void | |
4530 | analyze_clone_icoming_counts (cgraph_node *node, | |
4531 | desc_incoming_count_struct *desc) | |
4532 | { | |
4533 | for (cgraph_edge *cs = node->callers; cs; cs = cs->next_caller) | |
4534 | if (cs->caller->thunk) | |
4535 | { | |
4536 | analyze_clone_icoming_counts (cs->caller, desc); | |
4537 | continue; | |
4538 | } | |
4539 | else | |
4540 | { | |
4541 | if (cs->count.initialized_p ()) | |
4542 | desc->count += cs->count.ipa (); | |
4543 | if (!desc->processed_edges->contains (cs) | |
4544 | && cs->caller->clone_of == desc->orig) | |
4545 | desc->unproc_orig_rec_edges++; | |
4546 | } | |
4547 | } | |
4548 | ||
4549 | /* If caller edge counts of a clone created for a self-recursive arithmetic | |
4550 | jump function must be adjusted because it is coming from a the "seed" clone | |
4551 | for the first value and so has been excessively scaled back as if it was not | |
4552 | a recursive call, adjust it so that the incoming counts of NODE match its | |
4553 | count. NODE is the node or its thunk. */ | |
4554 | ||
4555 | static void | |
4556 | adjust_clone_incoming_counts (cgraph_node *node, | |
4557 | desc_incoming_count_struct *desc) | |
4558 | { | |
4559 | for (cgraph_edge *cs = node->callers; cs; cs = cs->next_caller) | |
4560 | if (cs->caller->thunk) | |
4561 | { | |
4562 | adjust_clone_incoming_counts (cs->caller, desc); | |
4563 | profile_count sum = profile_count::zero (); | |
4564 | for (cgraph_edge *e = cs->caller->callers; e; e = e->next_caller) | |
4565 | if (e->count.initialized_p ()) | |
4566 | sum += e->count.ipa (); | |
4567 | cs->count = cs->count.combine_with_ipa_count (sum); | |
4568 | } | |
4569 | else if (!desc->processed_edges->contains (cs) | |
4570 | && cs->caller->clone_of == desc->orig) | |
4571 | { | |
4572 | cs->count += desc->count; | |
4573 | if (dump_file) | |
4574 | { | |
4575 | fprintf (dump_file, " Adjusted count of an incoming edge of " | |
4576 | "a clone %s -> %s to ", cs->caller->dump_name (), | |
4577 | cs->callee->dump_name ()); | |
4578 | cs->count.dump (dump_file); | |
4579 | fprintf (dump_file, "\n"); | |
4580 | } | |
4581 | } | |
4582 | } | |
4583 | ||
4584 | /* When ORIG_NODE has been cloned for values which have been generated fora | |
4585 | self-recursive call as a result of an arithmetic pass-through | |
4586 | jump-functions, adjust its count together with counts of all such clones in | |
4587 | SELF_GEN_CLONES which also at this point contains ORIG_NODE itself. | |
4588 | ||
4589 | The function sums the counts of the original node and all its clones that | |
4590 | cannot be attributed to a specific clone because it comes from a | |
4591 | non-recursive edge. This sum is then evenly divided between the clones and | |
4592 | on top of that each one gets all the counts which can be attributed directly | |
4593 | to it. */ | |
4594 | ||
4595 | static void | |
4596 | update_counts_for_self_gen_clones (cgraph_node *orig_node, | |
4597 | const vec<cgraph_node *> &self_gen_clones) | |
4598 | { | |
4599 | profile_count redist_sum = orig_node->count.ipa (); | |
4600 | if (!(redist_sum > profile_count::zero ())) | |
4601 | return; | |
4602 | ||
4603 | if (dump_file) | |
4604 | fprintf (dump_file, " Updating profile of self recursive clone " | |
4605 | "series\n"); | |
4606 | ||
4607 | gather_other_count_struct gocs; | |
4608 | gocs.orig = orig_node; | |
4609 | gocs.other_count = profile_count::zero (); | |
4610 | ||
4611 | auto_vec <profile_count, 8> other_edges_count; | |
4612 | for (cgraph_node *n : self_gen_clones) | |
4613 | { | |
4614 | gocs.other_count = profile_count::zero (); | |
4615 | n->call_for_symbol_thunks_and_aliases (gather_count_of_non_rec_edges, | |
4616 | &gocs, false); | |
4617 | other_edges_count.safe_push (gocs.other_count); | |
4618 | redist_sum -= gocs.other_count; | |
4619 | } | |
4620 | ||
4621 | hash_set<cgraph_edge *> processed_edges; | |
4622 | unsigned i = 0; | |
4623 | for (cgraph_node *n : self_gen_clones) | |
4624 | { | |
4625 | profile_count orig_count = n->count; | |
4626 | profile_count new_count | |
4627 | = (redist_sum.apply_scale (1, self_gen_clones.length ()) | |
4628 | + other_edges_count[i]); | |
4629 | new_count = lenient_count_portion_handling (new_count, orig_node); | |
4630 | n->count = new_count; | |
4631 | profile_count::adjust_for_ipa_scaling (&new_count, &orig_count); | |
4632 | for (cgraph_edge *cs = n->callees; cs; cs = cs->next_callee) | |
4633 | { | |
4634 | cs->count = cs->count.apply_scale (new_count, orig_count); | |
4635 | processed_edges.add (cs); | |
4636 | } | |
4637 | for (cgraph_edge *cs = n->indirect_calls; cs; cs = cs->next_callee) | |
4638 | cs->count = cs->count.apply_scale (new_count, orig_count); | |
4639 | ||
4640 | i++; | |
4641 | } | |
4642 | ||
4643 | /* There are still going to be edges to ORIG_NODE that have one or more | |
4644 | clones coming from another node clone in SELF_GEN_CLONES and which we | |
4645 | scaled by the same amount, which means that the total incoming sum of | |
4646 | counts to ORIG_NODE will be too high, scale such edges back. */ | |
4647 | for (cgraph_edge *cs = orig_node->callees; cs; cs = cs->next_callee) | |
3995f3a2 | 4648 | { |
d1e2e4f9 MJ |
4649 | if (cs->callee->ultimate_alias_target () == orig_node) |
4650 | { | |
4651 | unsigned den = 0; | |
4652 | for (cgraph_edge *e = cs; e; e = get_next_cgraph_edge_clone (e)) | |
4653 | if (e->callee->ultimate_alias_target () == orig_node | |
4654 | && processed_edges.contains (e)) | |
4655 | den++; | |
4656 | if (den > 0) | |
4657 | for (cgraph_edge *e = cs; e; e = get_next_cgraph_edge_clone (e)) | |
4658 | if (e->callee->ultimate_alias_target () == orig_node | |
4659 | && processed_edges.contains (e)) | |
4660 | e->count = e->count.apply_scale (1, den); | |
4661 | } | |
3995f3a2 | 4662 | } |
d1e2e4f9 MJ |
4663 | |
4664 | /* Edges from the seeds of the valus generated for arithmetic jump-functions | |
4665 | along self-recursive edges are likely to have fairly low count and so | |
4666 | edges from them to nodes in the self_gen_clones do not correspond to the | |
4667 | artificially distributed count of the nodes, the total sum of incoming | |
4668 | edges to some clones might be too low. Detect this situation and correct | |
4669 | it. */ | |
4670 | for (cgraph_node *n : self_gen_clones) | |
4671 | { | |
4672 | if (!(n->count.ipa () > profile_count::zero ())) | |
4673 | continue; | |
4674 | ||
4675 | desc_incoming_count_struct desc; | |
4676 | desc.orig = orig_node; | |
4677 | desc.processed_edges = &processed_edges; | |
4678 | desc.count = profile_count::zero (); | |
4679 | desc.unproc_orig_rec_edges = 0; | |
4680 | analyze_clone_icoming_counts (n, &desc); | |
4681 | ||
4682 | if (n->count.differs_from_p (desc.count)) | |
4683 | { | |
4684 | if (n->count > desc.count | |
4685 | && desc.unproc_orig_rec_edges > 0) | |
4686 | { | |
4687 | desc.count = n->count - desc.count; | |
4688 | desc.count | |
4689 | = desc.count.apply_scale (1, desc.unproc_orig_rec_edges); | |
4690 | adjust_clone_incoming_counts (n, &desc); | |
4691 | } | |
4692 | else if (dump_file) | |
4693 | fprintf (dump_file, | |
4694 | " Unable to fix up incoming counts for %s.\n", | |
4695 | n->dump_name ()); | |
4696 | } | |
4697 | } | |
4698 | ||
4699 | if (dump_file) | |
4700 | for (cgraph_node *n : self_gen_clones) | |
4701 | dump_profile_updates (n, n != orig_node); | |
4702 | return; | |
310bc633 | 4703 | } |
c6f7cfc1 | 4704 | |
310bc633 | 4705 | /* After a specialized NEW_NODE version of ORIG_NODE has been created, update |
d1e2e4f9 MJ |
4706 | their profile information to reflect this. This function should not be used |
4707 | for clones generated for arithmetic pass-through jump functions on a | |
4708 | self-recursive call graph edge, that situation is handled by | |
4709 | update_counts_for_self_gen_clones. */ | |
518dc859 | 4710 | |
518dc859 | 4711 | static void |
310bc633 MJ |
4712 | update_profiling_info (struct cgraph_node *orig_node, |
4713 | struct cgraph_node *new_node) | |
518dc859 | 4714 | { |
310bc633 | 4715 | struct caller_statistics stats; |
d1e2e4f9 MJ |
4716 | profile_count new_sum; |
4717 | profile_count remainder, orig_node_count = orig_node->count.ipa (); | |
310bc633 | 4718 | |
d1e2e4f9 | 4719 | if (!(orig_node_count > profile_count::zero ())) |
310bc633 | 4720 | return; |
518dc859 | 4721 | |
d1e2e4f9 MJ |
4722 | if (dump_file) |
4723 | { | |
4724 | fprintf (dump_file, " Updating profile from original count: "); | |
4725 | orig_node_count.dump (dump_file); | |
4726 | fprintf (dump_file, "\n"); | |
4727 | } | |
4728 | ||
4729 | init_caller_stats (&stats, new_node); | |
d52f5295 ML |
4730 | new_node->call_for_symbol_thunks_and_aliases (gather_caller_stats, &stats, |
4731 | false); | |
310bc633 MJ |
4732 | new_sum = stats.count_sum; |
4733 | ||
d1e2e4f9 | 4734 | if (new_sum > orig_node_count) |
518dc859 | 4735 | { |
d1e2e4f9 MJ |
4736 | /* TODO: Perhaps this should be gcc_unreachable ()? */ |
4737 | remainder = profile_count::zero ().guessed_local (); | |
4738 | } | |
4739 | else if (stats.rec_count_sum.nonzero_p ()) | |
4740 | { | |
4741 | int new_nonrec_calls = stats.n_nonrec_calls; | |
4742 | /* There are self-recursive edges which are likely to bring in the | |
4743 | majority of calls but which we must divide in between the original and | |
4744 | new node. */ | |
4745 | init_caller_stats (&stats, orig_node); | |
4746 | orig_node->call_for_symbol_thunks_and_aliases (gather_caller_stats, | |
4747 | &stats, false); | |
4748 | int orig_nonrec_calls = stats.n_nonrec_calls; | |
4749 | profile_count orig_nonrec_call_count = stats.count_sum; | |
4750 | ||
4751 | if (orig_node->local) | |
3995f3a2 | 4752 | { |
d1e2e4f9 MJ |
4753 | if (!orig_nonrec_call_count.nonzero_p ()) |
4754 | { | |
4755 | if (dump_file) | |
4756 | fprintf (dump_file, " The original is local and the only " | |
4757 | "incoming edges from non-dead callers with nonzero " | |
4758 | "counts are self-recursive, assuming it is cold.\n"); | |
4759 | /* The NEW_NODE count and counts of all its outgoing edges | |
4760 | are still unmodified copies of ORIG_NODE's. Just clear | |
4761 | the latter and bail out. */ | |
4762 | profile_count zero; | |
4763 | if (opt_for_fn (orig_node->decl, flag_profile_partial_training)) | |
4764 | zero = profile_count::zero ().guessed_local (); | |
4765 | else | |
4766 | zero = profile_count::adjusted_zero (); | |
4767 | orig_node->count = zero; | |
4768 | for (cgraph_edge *cs = orig_node->callees; | |
4769 | cs; | |
4770 | cs = cs->next_callee) | |
4771 | cs->count = zero; | |
4772 | for (cgraph_edge *cs = orig_node->indirect_calls; | |
4773 | cs; | |
4774 | cs = cs->next_callee) | |
4775 | cs->count = zero; | |
4776 | return; | |
4777 | } | |
4778 | } | |
4779 | else | |
4780 | { | |
4781 | /* Let's behave as if there was another caller that accounts for all | |
4782 | the calls that were either indirect or from other compilation | |
4783 | units. */ | |
4784 | orig_nonrec_calls++; | |
4785 | profile_count pretend_caller_count | |
4786 | = (orig_node_count - new_sum - orig_nonrec_call_count | |
4787 | - stats.rec_count_sum); | |
4788 | orig_nonrec_call_count += pretend_caller_count; | |
3995f3a2 JH |
4789 | } |
4790 | ||
d1e2e4f9 MJ |
4791 | /* Divide all "unexplained" counts roughly proportionally to sums of |
4792 | counts of non-recursive calls. | |
4793 | ||
4794 | We put rather arbitrary limits on how many counts we claim because the | |
4795 | number of non-self-recursive incoming count is only a rough guideline | |
4796 | and there are cases (such as mcf) where using it blindly just takes | |
4797 | too many. And if lattices are considered in the opposite order we | |
4798 | could also take too few. */ | |
4799 | profile_count unexp = orig_node_count - new_sum - orig_nonrec_call_count; | |
4800 | ||
4801 | int limit_den = 2 * (orig_nonrec_calls + new_nonrec_calls); | |
4802 | profile_count new_part | |
4803 | = MAX(MIN (unexp.apply_scale (new_sum, | |
4804 | new_sum + orig_nonrec_call_count), | |
4805 | unexp.apply_scale (limit_den - 1, limit_den)), | |
4806 | unexp.apply_scale (new_nonrec_calls, limit_den)); | |
310bc633 | 4807 | if (dump_file) |
3995f3a2 | 4808 | { |
d1e2e4f9 MJ |
4809 | fprintf (dump_file, " Claiming "); |
4810 | new_part.dump (dump_file); | |
4811 | fprintf (dump_file, " of unexplained "); | |
4812 | unexp.dump (dump_file); | |
4813 | fprintf (dump_file, " counts because of self-recursive " | |
4814 | "calls\n"); | |
3995f3a2 | 4815 | } |
d1e2e4f9 MJ |
4816 | new_sum += new_part; |
4817 | remainder = lenient_count_portion_handling (orig_node_count - new_sum, | |
4818 | orig_node); | |
518dc859 | 4819 | } |
d1e2e4f9 MJ |
4820 | else |
4821 | remainder = lenient_count_portion_handling (orig_node_count - new_sum, | |
4822 | orig_node); | |
34fbe3f0 | 4823 | |
517048ce | 4824 | new_sum = orig_node_count.combine_with_ipa_count (new_sum); |
2e7fd867 | 4825 | new_node->count = new_sum; |
310bc633 MJ |
4826 | orig_node->count = remainder; |
4827 | ||
d1e2e4f9 | 4828 | profile_count orig_new_node_count = orig_node_count; |
2e7fd867 | 4829 | profile_count::adjust_for_ipa_scaling (&new_sum, &orig_new_node_count); |
d1e2e4f9 | 4830 | for (cgraph_edge *cs = new_node->callees; cs; cs = cs->next_callee) |
2e7fd867 | 4831 | cs->count = cs->count.apply_scale (new_sum, orig_new_node_count); |
d1e2e4f9 | 4832 | for (cgraph_edge *cs = new_node->indirect_calls; cs; cs = cs->next_callee) |
2e7fd867 | 4833 | cs->count = cs->count.apply_scale (new_sum, orig_new_node_count); |
310bc633 | 4834 | |
5a686851 | 4835 | profile_count::adjust_for_ipa_scaling (&remainder, &orig_node_count); |
d1e2e4f9 | 4836 | for (cgraph_edge *cs = orig_node->callees; cs; cs = cs->next_callee) |
3995f3a2 | 4837 | cs->count = cs->count.apply_scale (remainder, orig_node_count); |
d1e2e4f9 | 4838 | for (cgraph_edge *cs = orig_node->indirect_calls; cs; cs = cs->next_callee) |
2e7fd867 | 4839 | cs->count = cs->count.apply_scale (remainder, orig_node_count); |
310bc633 MJ |
4840 | |
4841 | if (dump_file) | |
d1e2e4f9 MJ |
4842 | { |
4843 | dump_profile_updates (new_node, true); | |
4844 | dump_profile_updates (orig_node, false); | |
4845 | } | |
518dc859 RL |
4846 | } |
4847 | ||
310bc633 MJ |
4848 | /* Update the respective profile of specialized NEW_NODE and the original |
4849 | ORIG_NODE after additional edges with cumulative count sum REDIRECTED_SUM | |
4850 | have been redirected to the specialized version. */ | |
4851 | ||
4852 | static void | |
4853 | update_specialized_profile (struct cgraph_node *new_node, | |
4854 | struct cgraph_node *orig_node, | |
3995f3a2 | 4855 | profile_count redirected_sum) |
5e45130d | 4856 | { |
a065d52e | 4857 | struct cgraph_edge *cs; |
3995f3a2 | 4858 | profile_count new_node_count, orig_node_count = orig_node->count; |
5e45130d | 4859 | |
310bc633 | 4860 | if (dump_file) |
3995f3a2 JH |
4861 | { |
4862 | fprintf (dump_file, " the sum of counts of redirected edges is "); | |
4863 | redirected_sum.dump (dump_file); | |
4864 | fprintf (dump_file, "\n"); | |
4865 | } | |
4866 | if (!(orig_node_count > profile_count::zero ())) | |
310bc633 | 4867 | return; |
a065d52e | 4868 | |
310bc633 | 4869 | gcc_assert (orig_node_count >= redirected_sum); |
5e45130d | 4870 | |
310bc633 MJ |
4871 | new_node_count = new_node->count; |
4872 | new_node->count += redirected_sum; | |
4873 | orig_node->count -= redirected_sum; | |
a065d52e | 4874 | |
155c9907 | 4875 | for (cs = new_node->callees; cs; cs = cs->next_callee) |
e3951b03 | 4876 | cs->count += cs->count.apply_scale (redirected_sum, new_node_count); |
a065d52e | 4877 | |
155c9907 | 4878 | for (cs = orig_node->callees; cs; cs = cs->next_callee) |
310bc633 | 4879 | { |
3995f3a2 JH |
4880 | profile_count dec = cs->count.apply_scale (redirected_sum, |
4881 | orig_node_count); | |
4882 | cs->count -= dec; | |
310bc633 | 4883 | } |
a065d52e | 4884 | |
310bc633 | 4885 | if (dump_file) |
d1e2e4f9 MJ |
4886 | { |
4887 | dump_profile_updates (new_node, true); | |
4888 | dump_profile_updates (orig_node, false); | |
4889 | } | |
5e45130d JH |
4890 | } |
4891 | ||
13586172 MJ |
4892 | static void adjust_references_in_caller (cgraph_edge *cs, |
4893 | symtab_node *symbol, int index); | |
4894 | ||
4895 | /* Simple structure to pass a symbol and index (with same meaning as parameters | |
4896 | of adjust_references_in_caller) through a void* parameter of a | |
4897 | call_for_symbol_thunks_and_aliases callback. */ | |
4898 | struct symbol_and_index_together | |
4899 | { | |
4900 | symtab_node *symbol; | |
4901 | int index; | |
4902 | }; | |
4903 | ||
4904 | /* Worker callback of call_for_symbol_thunks_and_aliases to recursively call | |
4905 | adjust_references_in_caller on edges up in the call-graph, if necessary. */ | |
4906 | static bool | |
4907 | adjust_refs_in_act_callers (struct cgraph_node *node, void *data) | |
4908 | { | |
4909 | symbol_and_index_together *pack = (symbol_and_index_together *) data; | |
4910 | for (cgraph_edge *cs = node->callers; cs; cs = cs->next_caller) | |
4911 | if (!cs->caller->thunk) | |
4912 | adjust_references_in_caller (cs, pack->symbol, pack->index); | |
4913 | return false; | |
4914 | } | |
4915 | ||
4916 | /* At INDEX of a function being called by CS there is an ADDR_EXPR of a | |
4917 | variable which is only dereferenced and which is represented by SYMBOL. See | |
4918 | if we can remove ADDR reference in callers assosiated witht the call. */ | |
4919 | ||
4920 | static void | |
4921 | adjust_references_in_caller (cgraph_edge *cs, symtab_node *symbol, int index) | |
4922 | { | |
4923 | ipa_edge_args *args = ipa_edge_args_sum->get (cs); | |
4924 | ipa_jump_func *jfunc = ipa_get_ith_jump_func (args, index); | |
4925 | if (jfunc->type == IPA_JF_CONST) | |
4926 | { | |
4927 | ipa_ref *to_del = cs->caller->find_reference (symbol, cs->call_stmt, | |
4928 | cs->lto_stmt_uid); | |
4929 | if (!to_del) | |
4930 | return; | |
4931 | to_del->remove_reference (); | |
4932 | if (dump_file) | |
4933 | fprintf (dump_file, " Removed a reference from %s to %s.\n", | |
4934 | cs->caller->dump_name (), symbol->dump_name ()); | |
4935 | return; | |
4936 | } | |
4937 | ||
4938 | if (jfunc->type != IPA_JF_PASS_THROUGH | |
4939 | || ipa_get_jf_pass_through_operation (jfunc) != NOP_EXPR) | |
4940 | return; | |
4941 | ||
4942 | int fidx = ipa_get_jf_pass_through_formal_id (jfunc); | |
4943 | cgraph_node *caller = cs->caller; | |
4944 | ipa_node_params *caller_info = ipa_node_params_sum->get (caller); | |
4945 | /* TODO: This consistency check may be too big and not really | |
4946 | that useful. Consider removing it. */ | |
4947 | tree cst; | |
4948 | if (caller_info->ipcp_orig_node) | |
4949 | cst = caller_info->known_csts[fidx]; | |
4950 | else | |
4951 | { | |
4952 | ipcp_lattice<tree> *lat = ipa_get_scalar_lat (caller_info, fidx); | |
4953 | gcc_assert (lat->is_single_const ()); | |
4954 | cst = lat->values->value; | |
4955 | } | |
4956 | gcc_assert (TREE_CODE (cst) == ADDR_EXPR | |
4957 | && (symtab_node::get (get_base_address (TREE_OPERAND (cst, 0))) | |
4958 | == symbol)); | |
4959 | ||
4960 | int cuses = ipa_get_controlled_uses (caller_info, fidx); | |
4961 | if (cuses == IPA_UNDESCRIBED_USE) | |
4962 | return; | |
4963 | gcc_assert (cuses > 0); | |
4964 | cuses--; | |
4965 | ipa_set_controlled_uses (caller_info, fidx, cuses); | |
4966 | if (cuses) | |
4967 | return; | |
4968 | ||
4969 | if (caller_info->ipcp_orig_node) | |
4970 | { | |
4971 | /* Cloning machinery has created a reference here, we need to either | |
4972 | remove it or change it to a read one. */ | |
4973 | ipa_ref *to_del = caller->find_reference (symbol, NULL, 0); | |
4974 | if (to_del && to_del->use == IPA_REF_ADDR) | |
4975 | { | |
4976 | to_del->remove_reference (); | |
4977 | if (dump_file) | |
4978 | fprintf (dump_file, " Removed a reference from %s to %s.\n", | |
4979 | cs->caller->dump_name (), symbol->dump_name ()); | |
4980 | if (ipa_get_param_load_dereferenced (caller_info, fidx)) | |
4981 | { | |
4982 | caller->create_reference (symbol, IPA_REF_LOAD, NULL); | |
4983 | if (dump_file) | |
4984 | fprintf (dump_file, | |
4985 | " ...and replaced it with LOAD one.\n"); | |
4986 | } | |
4987 | } | |
4988 | } | |
4989 | ||
4990 | symbol_and_index_together pack; | |
4991 | pack.symbol = symbol; | |
4992 | pack.index = fidx; | |
4993 | if (caller->can_change_signature) | |
4994 | caller->call_for_symbol_thunks_and_aliases (adjust_refs_in_act_callers, | |
4995 | &pack, true); | |
4996 | } | |
4997 | ||
4998 | ||
ff6686d2 MJ |
4999 | /* Return true if we would like to remove a parameter from NODE when cloning it |
5000 | with KNOWN_CSTS scalar constants. */ | |
5001 | ||
5002 | static bool | |
5003 | want_remove_some_param_p (cgraph_node *node, vec<tree> known_csts) | |
5004 | { | |
5005 | auto_vec<bool, 16> surviving; | |
5006 | bool filled_vec = false; | |
a4a3cdd0 | 5007 | ipa_node_params *info = ipa_node_params_sum->get (node); |
ff6686d2 MJ |
5008 | int i, count = ipa_get_param_count (info); |
5009 | ||
5010 | for (i = 0; i < count; i++) | |
5011 | { | |
5012 | if (!known_csts[i] && ipa_is_param_used (info, i)) | |
5013 | continue; | |
5014 | ||
5015 | if (!filled_vec) | |
5016 | { | |
ae7a23a3 JH |
5017 | clone_info *info = clone_info::get (node); |
5018 | if (!info || !info->param_adjustments) | |
ff6686d2 | 5019 | return true; |
ae7a23a3 | 5020 | info->param_adjustments->get_surviving_params (&surviving); |
ff6686d2 MJ |
5021 | filled_vec = true; |
5022 | } | |
5023 | if (surviving.length() < (unsigned) i && surviving[i]) | |
5024 | return true; | |
5025 | } | |
5026 | return false; | |
5027 | } | |
5028 | ||
44210a96 MJ |
5029 | /* Create a specialized version of NODE with known constants in KNOWN_CSTS, |
5030 | known contexts in KNOWN_CONTEXTS and known aggregate values in AGGVALS and | |
5031 | redirect all edges in CALLERS to it. */ | |
a065d52e | 5032 | |
310bc633 MJ |
5033 | static struct cgraph_node * |
5034 | create_specialized_node (struct cgraph_node *node, | |
44210a96 MJ |
5035 | vec<tree> known_csts, |
5036 | vec<ipa_polymorphic_call_context> known_contexts, | |
2c9561b5 | 5037 | struct ipa_agg_replacement_value *aggvals, |
265af872 | 5038 | vec<cgraph_edge *> &callers) |
5e45130d | 5039 | { |
a4a3cdd0 | 5040 | ipa_node_params *new_info, *info = ipa_node_params_sum->get (node); |
d52f5295 | 5041 | vec<ipa_replace_map *, va_gc> *replace_trees = NULL; |
ff6686d2 | 5042 | vec<ipa_adjusted_param, va_gc> *new_params = NULL; |
79ee9826 | 5043 | struct ipa_agg_replacement_value *av; |
310bc633 MJ |
5044 | struct cgraph_node *new_node; |
5045 | int i, count = ipa_get_param_count (info); | |
ae7a23a3 JH |
5046 | clone_info *cinfo = clone_info::get (node); |
5047 | ipa_param_adjustments *old_adjustments = cinfo | |
5048 | ? cinfo->param_adjustments : NULL; | |
ff6686d2 | 5049 | ipa_param_adjustments *new_adjustments; |
310bc633 | 5050 | gcc_assert (!info->ipcp_orig_node); |
87f94429 | 5051 | gcc_assert (node->can_change_signature |
ff6686d2 MJ |
5052 | || !old_adjustments); |
5053 | ||
5054 | if (old_adjustments) | |
5055 | { | |
5056 | /* At the moment all IPA optimizations should use the number of | |
5057 | parameters of the prevailing decl as the m_always_copy_start. | |
5058 | Handling any other value would complicate the code below, so for the | |
5059 | time bing let's only assert it is so. */ | |
5060 | gcc_assert (old_adjustments->m_always_copy_start == count | |
5061 | || old_adjustments->m_always_copy_start < 0); | |
5062 | int old_adj_count = vec_safe_length (old_adjustments->m_adj_params); | |
5063 | for (i = 0; i < old_adj_count; i++) | |
310bc633 | 5064 | { |
ff6686d2 | 5065 | ipa_adjusted_param *old_adj = &(*old_adjustments->m_adj_params)[i]; |
87f94429 | 5066 | if (!node->can_change_signature |
ff6686d2 MJ |
5067 | || old_adj->op != IPA_PARAM_OP_COPY |
5068 | || (!known_csts[old_adj->base_index] | |
5069 | && ipa_is_param_used (info, old_adj->base_index))) | |
5070 | { | |
5071 | ipa_adjusted_param new_adj = *old_adj; | |
310bc633 | 5072 | |
ff6686d2 MJ |
5073 | new_adj.prev_clone_adjustment = true; |
5074 | new_adj.prev_clone_index = i; | |
5075 | vec_safe_push (new_params, new_adj); | |
5076 | } | |
310bc633 | 5077 | } |
ff6686d2 MJ |
5078 | bool skip_return = old_adjustments->m_skip_return; |
5079 | new_adjustments = (new (ggc_alloc <ipa_param_adjustments> ()) | |
5080 | ipa_param_adjustments (new_params, count, | |
5081 | skip_return)); | |
310bc633 | 5082 | } |
87f94429 | 5083 | else if (node->can_change_signature |
ff6686d2 | 5084 | && want_remove_some_param_p (node, known_csts)) |
d7da5cc8 | 5085 | { |
ff6686d2 MJ |
5086 | ipa_adjusted_param adj; |
5087 | memset (&adj, 0, sizeof (adj)); | |
5088 | adj.op = IPA_PARAM_OP_COPY; | |
5089 | for (i = 0; i < count; i++) | |
5090 | if (!known_csts[i] && ipa_is_param_used (info, i)) | |
5091 | { | |
5092 | adj.base_index = i; | |
5093 | adj.prev_clone_index = i; | |
5094 | vec_safe_push (new_params, adj); | |
5095 | } | |
5096 | new_adjustments = (new (ggc_alloc <ipa_param_adjustments> ()) | |
5097 | ipa_param_adjustments (new_params, count, false)); | |
d7da5cc8 | 5098 | } |
ff6686d2 MJ |
5099 | else |
5100 | new_adjustments = NULL; | |
310bc633 | 5101 | |
ae7a23a3 | 5102 | replace_trees = cinfo ? vec_safe_copy (cinfo->tree_map) : NULL; |
155c9907 | 5103 | for (i = 0; i < count; i++) |
310bc633 | 5104 | { |
44210a96 | 5105 | tree t = known_csts[i]; |
13586172 MJ |
5106 | if (!t) |
5107 | continue; | |
310bc633 | 5108 | |
13586172 MJ |
5109 | gcc_checking_assert (TREE_CODE (t) != TREE_BINFO); |
5110 | ||
5111 | bool load_ref = false; | |
5112 | symtab_node *ref_symbol; | |
5113 | if (TREE_CODE (t) == ADDR_EXPR) | |
5114 | { | |
5115 | tree base = get_base_address (TREE_OPERAND (t, 0)); | |
5116 | if (TREE_CODE (base) == VAR_DECL | |
5117 | && ipa_get_controlled_uses (info, i) == 0 | |
5118 | && ipa_get_param_load_dereferenced (info, i) | |
5119 | && (ref_symbol = symtab_node::get (base))) | |
5120 | { | |
5121 | load_ref = true; | |
5122 | if (node->can_change_signature) | |
5123 | for (cgraph_edge *caller : callers) | |
5124 | adjust_references_in_caller (caller, ref_symbol, i); | |
5125 | } | |
310bc633 | 5126 | } |
13586172 MJ |
5127 | |
5128 | ipa_replace_map *replace_map = get_replacement_map (info, t, i, load_ref); | |
5129 | if (replace_map) | |
5130 | vec_safe_push (replace_trees, replace_map); | |
5e45130d | 5131 | } |
7b668576 MJ |
5132 | auto_vec<cgraph_edge *, 2> self_recursive_calls; |
5133 | for (i = callers.length () - 1; i >= 0; i--) | |
5134 | { | |
5135 | cgraph_edge *cs = callers[i]; | |
5136 | if (cs->caller == node) | |
5137 | { | |
5138 | self_recursive_calls.safe_push (cs); | |
5139 | callers.unordered_remove (i); | |
5140 | } | |
5141 | } | |
5e45130d | 5142 | |
9e0b0ec3 MP |
5143 | unsigned &suffix_counter = clone_num_suffixes->get_or_insert ( |
5144 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME ( | |
5145 | node->decl))); | |
d52f5295 | 5146 | new_node = node->create_virtual_clone (callers, replace_trees, |
ff6686d2 | 5147 | new_adjustments, "constprop", |
53aedcce MP |
5148 | suffix_counter); |
5149 | suffix_counter++; | |
7b668576 | 5150 | |
5bf31c64 | 5151 | bool have_self_recursive_calls = !self_recursive_calls.is_empty (); |
7b668576 MJ |
5152 | for (unsigned j = 0; j < self_recursive_calls.length (); j++) |
5153 | { | |
1ac2bdb4 | 5154 | cgraph_edge *cs = get_next_cgraph_edge_clone (self_recursive_calls[j]); |
5fc1b920 MJ |
5155 | /* Cloned edges can disappear during cloning as speculation can be |
5156 | resolved, check that we have one and that it comes from the last | |
5157 | cloning. */ | |
5158 | if (cs && cs->caller == new_node) | |
5159 | cs->redirect_callee_duplicating_thunks (new_node); | |
5160 | /* Any future code that would make more than one clone of an outgoing | |
5161 | edge would confuse this mechanism, so let's check that does not | |
5162 | happen. */ | |
5163 | gcc_checking_assert (!cs | |
1ac2bdb4 ML |
5164 | || !get_next_cgraph_edge_clone (cs) |
5165 | || get_next_cgraph_edge_clone (cs)->caller != new_node); | |
7b668576 | 5166 | } |
5bf31c64 MJ |
5167 | if (have_self_recursive_calls) |
5168 | new_node->expand_all_artificial_thunks (); | |
7b668576 | 5169 | |
2c9561b5 | 5170 | ipa_set_node_agg_value_chain (new_node, aggvals); |
79ee9826 | 5171 | for (av = aggvals; av; av = av->next) |
2d8d3ae2 | 5172 | new_node->maybe_create_reference (av->value, NULL); |
79ee9826 | 5173 | |
310bc633 | 5174 | if (dump_file && (dump_flags & TDF_DETAILS)) |
2c9561b5 | 5175 | { |
464d0118 | 5176 | fprintf (dump_file, " the new node is %s.\n", new_node->dump_name ()); |
44210a96 MJ |
5177 | if (known_contexts.exists ()) |
5178 | { | |
155c9907 | 5179 | for (i = 0; i < count; i++) |
44210a96 MJ |
5180 | if (!known_contexts[i].useless_p ()) |
5181 | { | |
5182 | fprintf (dump_file, " known ctx %i is ", i); | |
5183 | known_contexts[i].dump (dump_file); | |
5184 | } | |
5185 | } | |
2c9561b5 MJ |
5186 | if (aggvals) |
5187 | ipa_dump_agg_replacement_values (dump_file, aggvals); | |
5188 | } | |
d1e2e4f9 | 5189 | |
a4a3cdd0 | 5190 | new_info = ipa_node_params_sum->get (new_node); |
310bc633 | 5191 | new_info->ipcp_orig_node = node; |
6cf67b62 | 5192 | new_node->ipcp_clone = true; |
44210a96 MJ |
5193 | new_info->known_csts = known_csts; |
5194 | new_info->known_contexts = known_contexts; | |
5e45130d | 5195 | |
44210a96 | 5196 | ipcp_discover_new_direct_edges (new_node, known_csts, known_contexts, aggvals); |
310bc633 | 5197 | |
310bc633 | 5198 | return new_node; |
5e45130d JH |
5199 | } |
5200 | ||
cfeef9ac MJ |
5201 | /* Return true if JFUNC, which describes a i-th parameter of call CS, is a |
5202 | pass-through function to itself when the cgraph_node involved is not an | |
5203 | IPA-CP clone. When SIMPLE is true, further check if JFUNC is a simple | |
5204 | no-operation pass-through. */ | |
7b668576 MJ |
5205 | |
5206 | static bool | |
a0f6a8cb FX |
5207 | self_recursive_pass_through_p (cgraph_edge *cs, ipa_jump_func *jfunc, int i, |
5208 | bool simple = true) | |
7b668576 MJ |
5209 | { |
5210 | enum availability availability; | |
5211 | if (cs->caller == cs->callee->function_symbol (&availability) | |
5212 | && availability > AVAIL_INTERPOSABLE | |
5213 | && jfunc->type == IPA_JF_PASS_THROUGH | |
a0f6a8cb | 5214 | && (!simple || ipa_get_jf_pass_through_operation (jfunc) == NOP_EXPR) |
cfeef9ac | 5215 | && ipa_get_jf_pass_through_formal_id (jfunc) == i |
a4a3cdd0 MJ |
5216 | && ipa_node_params_sum->get (cs->caller) |
5217 | && !ipa_node_params_sum->get (cs->caller)->ipcp_orig_node) | |
7b668576 MJ |
5218 | return true; |
5219 | return false; | |
5220 | } | |
5221 | ||
cfeef9ac MJ |
5222 | /* Return true if JFUNC, which describes a part of an aggregate represented or |
5223 | pointed to by the i-th parameter of call CS, is a pass-through function to | |
5224 | itself when the cgraph_node involved is not an IPA-CP clone.. When | |
5225 | SIMPLE is true, further check if JFUNC is a simple no-operation | |
5226 | pass-through. */ | |
951e27f5 FX |
5227 | |
5228 | static bool | |
5229 | self_recursive_agg_pass_through_p (cgraph_edge *cs, ipa_agg_jf_item *jfunc, | |
a0f6a8cb | 5230 | int i, bool simple = true) |
951e27f5 FX |
5231 | { |
5232 | enum availability availability; | |
5233 | if (cs->caller == cs->callee->function_symbol (&availability) | |
5234 | && availability > AVAIL_INTERPOSABLE | |
5235 | && jfunc->jftype == IPA_JF_LOAD_AGG | |
5236 | && jfunc->offset == jfunc->value.load_agg.offset | |
a0f6a8cb FX |
5237 | && (!simple || jfunc->value.pass_through.operation == NOP_EXPR) |
5238 | && jfunc->value.pass_through.formal_id == i | |
cfeef9ac | 5239 | && useless_type_conversion_p (jfunc->value.load_agg.type, jfunc->type) |
a4a3cdd0 MJ |
5240 | && ipa_node_params_sum->get (cs->caller) |
5241 | && !ipa_node_params_sum->get (cs->caller)->ipcp_orig_node) | |
951e27f5 FX |
5242 | return true; |
5243 | return false; | |
5244 | } | |
5245 | ||
310bc633 | 5246 | /* Given a NODE, and a subset of its CALLERS, try to populate blanks slots in |
44210a96 | 5247 | KNOWN_CSTS with constants that are also known for all of the CALLERS. */ |
3949c4a7 MJ |
5248 | |
5249 | static void | |
2c9561b5 | 5250 | find_more_scalar_values_for_callers_subset (struct cgraph_node *node, |
00dcc88a MS |
5251 | vec<tree> &known_csts, |
5252 | const vec<cgraph_edge *> &callers) | |
3949c4a7 | 5253 | { |
a4a3cdd0 | 5254 | ipa_node_params *info = ipa_node_params_sum->get (node); |
310bc633 | 5255 | int i, count = ipa_get_param_count (info); |
3949c4a7 | 5256 | |
155c9907 | 5257 | for (i = 0; i < count; i++) |
3949c4a7 | 5258 | { |
310bc633 MJ |
5259 | struct cgraph_edge *cs; |
5260 | tree newval = NULL_TREE; | |
5261 | int j; | |
df0d8136 | 5262 | bool first = true; |
e5cf5e11 | 5263 | tree type = ipa_get_type (info, i); |
3949c4a7 | 5264 | |
44210a96 | 5265 | if (ipa_get_scalar_lat (info, i)->bottom || known_csts[i]) |
3949c4a7 MJ |
5266 | continue; |
5267 | ||
9771b263 | 5268 | FOR_EACH_VEC_ELT (callers, j, cs) |
49c471e3 | 5269 | { |
310bc633 MJ |
5270 | struct ipa_jump_func *jump_func; |
5271 | tree t; | |
40591473 | 5272 | |
a4a3cdd0 MJ |
5273 | ipa_edge_args *args = ipa_edge_args_sum->get (cs); |
5274 | if (!args | |
5275 | || i >= ipa_get_cs_argument_count (args) | |
173b7355 | 5276 | || (i == 0 |
67f3791f | 5277 | && call_passes_through_thunk (cs))) |
155c9907 JJ |
5278 | { |
5279 | newval = NULL_TREE; | |
5280 | break; | |
5281 | } | |
a4a3cdd0 | 5282 | jump_func = ipa_get_ith_jump_func (args, i); |
7b668576 | 5283 | |
a0f6a8cb FX |
5284 | /* Besides simple pass-through jump function, arithmetic jump |
5285 | function could also introduce argument-direct-pass-through for | |
5286 | self-feeding recursive call. For example, | |
5287 | ||
5288 | fn (int i) | |
5289 | { | |
5290 | fn (i & 1); | |
5291 | } | |
5292 | ||
5293 | Given that i is 0, recursive propagation via (i & 1) also gets | |
5294 | 0. */ | |
5295 | if (self_recursive_pass_through_p (cs, jump_func, i, false)) | |
5296 | { | |
5297 | gcc_assert (newval); | |
5298 | t = ipa_get_jf_arith_result ( | |
5299 | ipa_get_jf_pass_through_operation (jump_func), | |
5300 | newval, | |
5301 | ipa_get_jf_pass_through_operand (jump_func), | |
5302 | type); | |
5303 | } | |
5304 | else | |
a4a3cdd0 MJ |
5305 | t = ipa_value_from_jfunc (ipa_node_params_sum->get (cs->caller), |
5306 | jump_func, type); | |
310bc633 MJ |
5307 | if (!t |
5308 | || (newval | |
df0d8136 JH |
5309 | && !values_equal_for_ipcp_p (t, newval)) |
5310 | || (!first && !newval)) | |
3949c4a7 | 5311 | { |
310bc633 MJ |
5312 | newval = NULL_TREE; |
5313 | break; | |
3949c4a7 | 5314 | } |
310bc633 MJ |
5315 | else |
5316 | newval = t; | |
df0d8136 | 5317 | first = false; |
3949c4a7 MJ |
5318 | } |
5319 | ||
310bc633 MJ |
5320 | if (newval) |
5321 | { | |
5322 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5323 | { | |
2c9561b5 | 5324 | fprintf (dump_file, " adding an extra known scalar value "); |
310bc633 | 5325 | print_ipcp_constant_value (dump_file, newval); |
0e8853ee JH |
5326 | fprintf (dump_file, " for "); |
5327 | ipa_dump_param (dump_file, info, i); | |
310bc633 MJ |
5328 | fprintf (dump_file, "\n"); |
5329 | } | |
5e45130d | 5330 | |
44210a96 | 5331 | known_csts[i] = newval; |
310bc633 | 5332 | } |
5e45130d | 5333 | } |
5e45130d JH |
5334 | } |
5335 | ||
44210a96 MJ |
5336 | /* Given a NODE and a subset of its CALLERS, try to populate plank slots in |
5337 | KNOWN_CONTEXTS with polymorphic contexts that are also known for all of the | |
5338 | CALLERS. */ | |
5339 | ||
5340 | static void | |
5341 | find_more_contexts_for_caller_subset (cgraph_node *node, | |
5342 | vec<ipa_polymorphic_call_context> | |
5343 | *known_contexts, | |
00dcc88a | 5344 | const vec<cgraph_edge *> &callers) |
44210a96 | 5345 | { |
a4a3cdd0 | 5346 | ipa_node_params *info = ipa_node_params_sum->get (node); |
44210a96 MJ |
5347 | int i, count = ipa_get_param_count (info); |
5348 | ||
155c9907 | 5349 | for (i = 0; i < count; i++) |
44210a96 MJ |
5350 | { |
5351 | cgraph_edge *cs; | |
5352 | ||
5353 | if (ipa_get_poly_ctx_lat (info, i)->bottom | |
5354 | || (known_contexts->exists () | |
5355 | && !(*known_contexts)[i].useless_p ())) | |
5356 | continue; | |
5357 | ||
5358 | ipa_polymorphic_call_context newval; | |
df0d8136 | 5359 | bool first = true; |
44210a96 MJ |
5360 | int j; |
5361 | ||
5362 | FOR_EACH_VEC_ELT (callers, j, cs) | |
5363 | { | |
a4a3cdd0 MJ |
5364 | ipa_edge_args *args = ipa_edge_args_sum->get (cs); |
5365 | if (!args | |
5366 | || i >= ipa_get_cs_argument_count (args)) | |
44210a96 | 5367 | return; |
a4a3cdd0 | 5368 | ipa_jump_func *jfunc = ipa_get_ith_jump_func (args, i); |
44210a96 | 5369 | ipa_polymorphic_call_context ctx; |
a4a3cdd0 MJ |
5370 | ctx = ipa_context_from_jfunc (ipa_node_params_sum->get (cs->caller), |
5371 | cs, i, jfunc); | |
df0d8136 | 5372 | if (first) |
44210a96 | 5373 | { |
44210a96 | 5374 | newval = ctx; |
df0d8136 | 5375 | first = false; |
44210a96 | 5376 | } |
df0d8136 JH |
5377 | else |
5378 | newval.meet_with (ctx); | |
5379 | if (newval.useless_p ()) | |
5380 | break; | |
44210a96 MJ |
5381 | } |
5382 | ||
df0d8136 | 5383 | if (!newval.useless_p ()) |
44210a96 MJ |
5384 | { |
5385 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5386 | { | |
5387 | fprintf (dump_file, " adding an extra known polymorphic " | |
5388 | "context "); | |
5389 | print_ipcp_constant_value (dump_file, newval); | |
5390 | fprintf (dump_file, " for "); | |
5391 | ipa_dump_param (dump_file, info, i); | |
5392 | fprintf (dump_file, "\n"); | |
5393 | } | |
5394 | ||
5395 | if (!known_contexts->exists ()) | |
cb3874dc ML |
5396 | known_contexts->safe_grow_cleared (ipa_get_param_count (info), |
5397 | true); | |
44210a96 MJ |
5398 | (*known_contexts)[i] = newval; |
5399 | } | |
5400 | ||
5401 | } | |
5402 | } | |
5403 | ||
2c9561b5 MJ |
5404 | /* Go through PLATS and create a vector of values consisting of values and |
5405 | offsets (minus OFFSET) of lattices that contain only a single value. */ | |
5406 | ||
eb270950 | 5407 | static vec<ipa_agg_value> |
99b1c316 | 5408 | copy_plats_to_inter (class ipcp_param_lattices *plats, HOST_WIDE_INT offset) |
2c9561b5 | 5409 | { |
eb270950 | 5410 | vec<ipa_agg_value> res = vNULL; |
2c9561b5 MJ |
5411 | |
5412 | if (!plats->aggs || plats->aggs_contain_variable || plats->aggs_bottom) | |
6e1aa848 | 5413 | return vNULL; |
2c9561b5 MJ |
5414 | |
5415 | for (struct ipcp_agg_lattice *aglat = plats->aggs; aglat; aglat = aglat->next) | |
c0cb5055 | 5416 | if (aglat->is_single_const ()) |
2c9561b5 | 5417 | { |
eb270950 | 5418 | struct ipa_agg_value ti; |
2c9561b5 MJ |
5419 | ti.offset = aglat->offset - offset; |
5420 | ti.value = aglat->values->value; | |
9771b263 | 5421 | res.safe_push (ti); |
2c9561b5 MJ |
5422 | } |
5423 | return res; | |
5424 | } | |
5425 | ||
5426 | /* Intersect all values in INTER with single value lattices in PLATS (while | |
5427 | subtracting OFFSET). */ | |
5428 | ||
5429 | static void | |
99b1c316 | 5430 | intersect_with_plats (class ipcp_param_lattices *plats, |
eb270950 | 5431 | vec<ipa_agg_value> *inter, |
2c9561b5 MJ |
5432 | HOST_WIDE_INT offset) |
5433 | { | |
5434 | struct ipcp_agg_lattice *aglat; | |
eb270950 | 5435 | struct ipa_agg_value *item; |
2c9561b5 MJ |
5436 | int k; |
5437 | ||
5438 | if (!plats->aggs || plats->aggs_contain_variable || plats->aggs_bottom) | |
5439 | { | |
9771b263 | 5440 | inter->release (); |
2c9561b5 MJ |
5441 | return; |
5442 | } | |
5443 | ||
5444 | aglat = plats->aggs; | |
9771b263 | 5445 | FOR_EACH_VEC_ELT (*inter, k, item) |
2c9561b5 MJ |
5446 | { |
5447 | bool found = false; | |
5448 | if (!item->value) | |
5449 | continue; | |
5450 | while (aglat) | |
5451 | { | |
5452 | if (aglat->offset - offset > item->offset) | |
5453 | break; | |
5454 | if (aglat->offset - offset == item->offset) | |
5455 | { | |
951e27f5 FX |
5456 | if (aglat->is_single_const ()) |
5457 | { | |
5458 | tree value = aglat->values->value; | |
5459 | ||
5460 | if (values_equal_for_ipcp_p (item->value, value)) | |
5461 | found = true; | |
951e27f5 | 5462 | } |
2c9561b5 MJ |
5463 | break; |
5464 | } | |
5465 | aglat = aglat->next; | |
5466 | } | |
5467 | if (!found) | |
5468 | item->value = NULL_TREE; | |
5469 | } | |
5470 | } | |
5471 | ||
5764ee3c | 5472 | /* Copy aggregate replacement values of NODE (which is an IPA-CP clone) to the |
2c9561b5 MJ |
5473 | vector result while subtracting OFFSET from the individual value offsets. */ |
5474 | ||
eb270950 | 5475 | static vec<ipa_agg_value> |
0fd44da3 MJ |
5476 | agg_replacements_to_vector (struct cgraph_node *node, int index, |
5477 | HOST_WIDE_INT offset) | |
2c9561b5 MJ |
5478 | { |
5479 | struct ipa_agg_replacement_value *av; | |
eb270950 | 5480 | vec<ipa_agg_value> res = vNULL; |
2c9561b5 MJ |
5481 | |
5482 | for (av = ipa_get_agg_replacements_for_node (node); av; av = av->next) | |
0fd44da3 MJ |
5483 | if (av->index == index |
5484 | && (av->offset - offset) >= 0) | |
2c9561b5 | 5485 | { |
eb270950 | 5486 | struct ipa_agg_value item; |
2c9561b5 MJ |
5487 | gcc_checking_assert (av->value); |
5488 | item.offset = av->offset - offset; | |
5489 | item.value = av->value; | |
9771b263 | 5490 | res.safe_push (item); |
2c9561b5 MJ |
5491 | } |
5492 | ||
5493 | return res; | |
5494 | } | |
5495 | ||
5496 | /* Intersect all values in INTER with those that we have already scheduled to | |
5497 | be replaced in parameter number INDEX of NODE, which is an IPA-CP clone | |
5498 | (while subtracting OFFSET). */ | |
5499 | ||
5500 | static void | |
5501 | intersect_with_agg_replacements (struct cgraph_node *node, int index, | |
eb270950 | 5502 | vec<ipa_agg_value> *inter, |
2c9561b5 MJ |
5503 | HOST_WIDE_INT offset) |
5504 | { | |
5505 | struct ipa_agg_replacement_value *srcvals; | |
eb270950 | 5506 | struct ipa_agg_value *item; |
2c9561b5 MJ |
5507 | int i; |
5508 | ||
5509 | srcvals = ipa_get_agg_replacements_for_node (node); | |
5510 | if (!srcvals) | |
5511 | { | |
9771b263 | 5512 | inter->release (); |
2c9561b5 MJ |
5513 | return; |
5514 | } | |
5515 | ||
9771b263 | 5516 | FOR_EACH_VEC_ELT (*inter, i, item) |
2c9561b5 MJ |
5517 | { |
5518 | struct ipa_agg_replacement_value *av; | |
5519 | bool found = false; | |
5520 | if (!item->value) | |
5521 | continue; | |
5522 | for (av = srcvals; av; av = av->next) | |
5523 | { | |
5524 | gcc_checking_assert (av->value); | |
5525 | if (av->index == index | |
5526 | && av->offset - offset == item->offset) | |
5527 | { | |
5528 | if (values_equal_for_ipcp_p (item->value, av->value)) | |
5529 | found = true; | |
5530 | break; | |
5531 | } | |
5532 | } | |
5533 | if (!found) | |
5534 | item->value = NULL_TREE; | |
5535 | } | |
5536 | } | |
5537 | ||
7e9f2b6e MJ |
5538 | /* Intersect values in INTER with aggregate values that come along edge CS to |
5539 | parameter number INDEX and return it. If INTER does not actually exist yet, | |
5540 | copy all incoming values to it. If we determine we ended up with no values | |
5541 | whatsoever, return a released vector. */ | |
5542 | ||
eb270950 | 5543 | static vec<ipa_agg_value> |
7e9f2b6e | 5544 | intersect_aggregates_with_edge (struct cgraph_edge *cs, int index, |
eb270950 | 5545 | vec<ipa_agg_value> inter) |
7e9f2b6e MJ |
5546 | { |
5547 | struct ipa_jump_func *jfunc; | |
a4a3cdd0 | 5548 | jfunc = ipa_get_ith_jump_func (ipa_edge_args_sum->get (cs), index); |
7e9f2b6e MJ |
5549 | if (jfunc->type == IPA_JF_PASS_THROUGH |
5550 | && ipa_get_jf_pass_through_operation (jfunc) == NOP_EXPR) | |
5551 | { | |
a4a3cdd0 | 5552 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
7e9f2b6e MJ |
5553 | int src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
5554 | ||
5555 | if (caller_info->ipcp_orig_node) | |
5556 | { | |
5557 | struct cgraph_node *orig_node = caller_info->ipcp_orig_node; | |
99b1c316 | 5558 | class ipcp_param_lattices *orig_plats; |
a4a3cdd0 MJ |
5559 | ipa_node_params *orig_info = ipa_node_params_sum->get (orig_node); |
5560 | orig_plats = ipa_get_parm_lattices (orig_info, src_idx); | |
7e9f2b6e MJ |
5561 | if (agg_pass_through_permissible_p (orig_plats, jfunc)) |
5562 | { | |
5563 | if (!inter.exists ()) | |
0fd44da3 | 5564 | inter = agg_replacements_to_vector (cs->caller, src_idx, 0); |
7e9f2b6e MJ |
5565 | else |
5566 | intersect_with_agg_replacements (cs->caller, src_idx, | |
5567 | &inter, 0); | |
32633ec8 | 5568 | return inter; |
c8f40352 | 5569 | } |
7e9f2b6e MJ |
5570 | } |
5571 | else | |
5572 | { | |
99b1c316 | 5573 | class ipcp_param_lattices *src_plats; |
7e9f2b6e MJ |
5574 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); |
5575 | if (agg_pass_through_permissible_p (src_plats, jfunc)) | |
5576 | { | |
5577 | /* Currently we do not produce clobber aggregate jump | |
5578 | functions, adjust when we do. */ | |
5579 | gcc_checking_assert (!jfunc->agg.items); | |
5580 | if (!inter.exists ()) | |
5581 | inter = copy_plats_to_inter (src_plats, 0); | |
5582 | else | |
5583 | intersect_with_plats (src_plats, &inter, 0); | |
32633ec8 | 5584 | return inter; |
c8f40352 | 5585 | } |
7e9f2b6e MJ |
5586 | } |
5587 | } | |
5588 | else if (jfunc->type == IPA_JF_ANCESTOR | |
5589 | && ipa_get_jf_ancestor_agg_preserved (jfunc)) | |
5590 | { | |
a4a3cdd0 | 5591 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
7e9f2b6e | 5592 | int src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
99b1c316 | 5593 | class ipcp_param_lattices *src_plats; |
7e9f2b6e MJ |
5594 | HOST_WIDE_INT delta = ipa_get_jf_ancestor_offset (jfunc); |
5595 | ||
5596 | if (caller_info->ipcp_orig_node) | |
5597 | { | |
5598 | if (!inter.exists ()) | |
0fd44da3 | 5599 | inter = agg_replacements_to_vector (cs->caller, src_idx, delta); |
7e9f2b6e | 5600 | else |
0fd44da3 | 5601 | intersect_with_agg_replacements (cs->caller, src_idx, &inter, |
7e9f2b6e MJ |
5602 | delta); |
5603 | } | |
5604 | else | |
5605 | { | |
5de73c05 | 5606 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); |
7e9f2b6e MJ |
5607 | /* Currently we do not produce clobber aggregate jump |
5608 | functions, adjust when we do. */ | |
5609 | gcc_checking_assert (!src_plats->aggs || !jfunc->agg.items); | |
5610 | if (!inter.exists ()) | |
5611 | inter = copy_plats_to_inter (src_plats, delta); | |
5612 | else | |
5613 | intersect_with_plats (src_plats, &inter, delta); | |
5614 | } | |
32633ec8 | 5615 | return inter; |
7e9f2b6e | 5616 | } |
32633ec8 FX |
5617 | |
5618 | if (jfunc->agg.items) | |
7e9f2b6e | 5619 | { |
a4a3cdd0 | 5620 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
eb270950 | 5621 | struct ipa_agg_value *item; |
7e9f2b6e MJ |
5622 | int k; |
5623 | ||
5624 | if (!inter.exists ()) | |
5625 | for (unsigned i = 0; i < jfunc->agg.items->length (); i++) | |
eb270950 FX |
5626 | { |
5627 | struct ipa_agg_jf_item *agg_item = &(*jfunc->agg.items)[i]; | |
a0f6a8cb FX |
5628 | tree value = ipa_agg_value_from_node (caller_info, cs->caller, |
5629 | agg_item); | |
5630 | if (value) | |
951e27f5 | 5631 | { |
a0f6a8cb | 5632 | struct ipa_agg_value agg_value; |
eb270950 | 5633 | |
eb270950 | 5634 | agg_value.value = value; |
a0f6a8cb FX |
5635 | agg_value.offset = agg_item->offset; |
5636 | inter.safe_push (agg_value); | |
eb270950 FX |
5637 | } |
5638 | } | |
7e9f2b6e MJ |
5639 | else |
5640 | FOR_EACH_VEC_ELT (inter, k, item) | |
5641 | { | |
5642 | int l = 0; | |
5de73c05 | 5643 | bool found = false; |
7e9f2b6e MJ |
5644 | |
5645 | if (!item->value) | |
5646 | continue; | |
5647 | ||
5648 | while ((unsigned) l < jfunc->agg.items->length ()) | |
5649 | { | |
5650 | struct ipa_agg_jf_item *ti; | |
5651 | ti = &(*jfunc->agg.items)[l]; | |
5652 | if (ti->offset > item->offset) | |
5653 | break; | |
5654 | if (ti->offset == item->offset) | |
5655 | { | |
951e27f5 FX |
5656 | tree value; |
5657 | ||
a0f6a8cb FX |
5658 | /* Besides simple pass-through aggregate jump function, |
5659 | arithmetic aggregate jump function could also bring | |
5660 | same aggregate value as parameter passed-in for | |
5661 | self-feeding recursive call. For example, | |
5662 | ||
5663 | fn (int *i) | |
5664 | { | |
5665 | int j = *i & 1; | |
5666 | fn (&j); | |
5667 | } | |
5668 | ||
5669 | Given that *i is 0, recursive propagation via (*i & 1) | |
5670 | also gets 0. */ | |
5671 | if (self_recursive_agg_pass_through_p (cs, ti, index, | |
5672 | false)) | |
5673 | value = ipa_get_jf_arith_result ( | |
5674 | ti->value.pass_through.operation, | |
5675 | item->value, | |
5676 | ti->value.pass_through.operand, | |
5677 | ti->type); | |
5678 | else | |
5679 | value = ipa_agg_value_from_node (caller_info, | |
5680 | cs->caller, ti); | |
5681 | ||
5682 | if (value && values_equal_for_ipcp_p (item->value, value)) | |
5683 | found = true; | |
7e9f2b6e MJ |
5684 | break; |
5685 | } | |
5686 | l++; | |
5687 | } | |
5688 | if (!found) | |
5689 | item->value = NULL; | |
5690 | } | |
5691 | } | |
5692 | else | |
5693 | { | |
c3284718 | 5694 | inter.release (); |
eb270950 | 5695 | return vNULL; |
7e9f2b6e MJ |
5696 | } |
5697 | return inter; | |
5698 | } | |
5699 | ||
2c9561b5 MJ |
5700 | /* Look at edges in CALLERS and collect all known aggregate values that arrive |
5701 | from all of them. */ | |
5702 | ||
5703 | static struct ipa_agg_replacement_value * | |
5704 | find_aggregate_values_for_callers_subset (struct cgraph_node *node, | |
00dcc88a | 5705 | const vec<cgraph_edge *> &callers) |
2c9561b5 | 5706 | { |
a4a3cdd0 | 5707 | ipa_node_params *dest_info = ipa_node_params_sum->get (node); |
6f9549ee MJ |
5708 | struct ipa_agg_replacement_value *res; |
5709 | struct ipa_agg_replacement_value **tail = &res; | |
2c9561b5 | 5710 | struct cgraph_edge *cs; |
dffdd6e5 | 5711 | int i, j, count = ipa_get_param_count (dest_info); |
2c9561b5 | 5712 | |
9771b263 | 5713 | FOR_EACH_VEC_ELT (callers, j, cs) |
2c9561b5 | 5714 | { |
a4a3cdd0 MJ |
5715 | ipa_edge_args *args = ipa_edge_args_sum->get (cs); |
5716 | if (!args) | |
a33c028e JH |
5717 | { |
5718 | count = 0; | |
5719 | break; | |
5720 | } | |
a4a3cdd0 | 5721 | int c = ipa_get_cs_argument_count (args); |
2c9561b5 MJ |
5722 | if (c < count) |
5723 | count = c; | |
5724 | } | |
5725 | ||
155c9907 | 5726 | for (i = 0; i < count; i++) |
2c9561b5 MJ |
5727 | { |
5728 | struct cgraph_edge *cs; | |
eb270950 FX |
5729 | vec<ipa_agg_value> inter = vNULL; |
5730 | struct ipa_agg_value *item; | |
99b1c316 | 5731 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (dest_info, i); |
2c9561b5 MJ |
5732 | int j; |
5733 | ||
5734 | /* Among other things, the following check should deal with all by_ref | |
5735 | mismatches. */ | |
7b920a9a | 5736 | if (plats->aggs_bottom) |
2c9561b5 MJ |
5737 | continue; |
5738 | ||
9771b263 | 5739 | FOR_EACH_VEC_ELT (callers, j, cs) |
2c9561b5 | 5740 | { |
7b668576 | 5741 | struct ipa_jump_func *jfunc |
a4a3cdd0 | 5742 | = ipa_get_ith_jump_func (ipa_edge_args_sum->get (cs), i); |
cf254442 MJ |
5743 | if (self_recursive_pass_through_p (cs, jfunc, i) |
5744 | && (!plats->aggs_by_ref | |
5745 | || ipa_get_jf_pass_through_agg_preserved (jfunc))) | |
7b668576 | 5746 | continue; |
7e9f2b6e | 5747 | inter = intersect_aggregates_with_edge (cs, i, inter); |
2c9561b5 | 5748 | |
9771b263 | 5749 | if (!inter.exists ()) |
2c9561b5 MJ |
5750 | goto next_param; |
5751 | } | |
5752 | ||
9771b263 | 5753 | FOR_EACH_VEC_ELT (inter, j, item) |
2c9561b5 MJ |
5754 | { |
5755 | struct ipa_agg_replacement_value *v; | |
5756 | ||
5757 | if (!item->value) | |
5758 | continue; | |
5759 | ||
766090c2 | 5760 | v = ggc_alloc<ipa_agg_replacement_value> (); |
2c9561b5 MJ |
5761 | v->index = i; |
5762 | v->offset = item->offset; | |
5763 | v->value = item->value; | |
7b920a9a | 5764 | v->by_ref = plats->aggs_by_ref; |
6f9549ee MJ |
5765 | *tail = v; |
5766 | tail = &v->next; | |
2c9561b5 MJ |
5767 | } |
5768 | ||
5769 | next_param: | |
9771b263 DN |
5770 | if (inter.exists ()) |
5771 | inter.release (); | |
2c9561b5 | 5772 | } |
6f9549ee | 5773 | *tail = NULL; |
2c9561b5 MJ |
5774 | return res; |
5775 | } | |
5776 | ||
2c9561b5 MJ |
5777 | /* Determine whether CS also brings all scalar values that the NODE is |
5778 | specialized for. */ | |
5779 | ||
5780 | static bool | |
5781 | cgraph_edge_brings_all_scalars_for_node (struct cgraph_edge *cs, | |
5782 | struct cgraph_node *node) | |
5783 | { | |
a4a3cdd0 | 5784 | ipa_node_params *dest_info = ipa_node_params_sum->get (node); |
2c9561b5 | 5785 | int count = ipa_get_param_count (dest_info); |
99b1c316 MS |
5786 | class ipa_node_params *caller_info; |
5787 | class ipa_edge_args *args; | |
2c9561b5 MJ |
5788 | int i; |
5789 | ||
a4a3cdd0 MJ |
5790 | caller_info = ipa_node_params_sum->get (cs->caller); |
5791 | args = ipa_edge_args_sum->get (cs); | |
2c9561b5 MJ |
5792 | for (i = 0; i < count; i++) |
5793 | { | |
5794 | struct ipa_jump_func *jump_func; | |
5795 | tree val, t; | |
5796 | ||
44210a96 | 5797 | val = dest_info->known_csts[i]; |
2c9561b5 MJ |
5798 | if (!val) |
5799 | continue; | |
5800 | ||
5801 | if (i >= ipa_get_cs_argument_count (args)) | |
5802 | return false; | |
5803 | jump_func = ipa_get_ith_jump_func (args, i); | |
e5cf5e11 PK |
5804 | t = ipa_value_from_jfunc (caller_info, jump_func, |
5805 | ipa_get_type (dest_info, i)); | |
2c9561b5 MJ |
5806 | if (!t || !values_equal_for_ipcp_p (val, t)) |
5807 | return false; | |
5808 | } | |
5809 | return true; | |
5810 | } | |
5811 | ||
5812 | /* Determine whether CS also brings all aggregate values that NODE is | |
5813 | specialized for. */ | |
5814 | static bool | |
5815 | cgraph_edge_brings_all_agg_vals_for_node (struct cgraph_edge *cs, | |
5816 | struct cgraph_node *node) | |
5817 | { | |
2c9561b5 | 5818 | struct ipa_agg_replacement_value *aggval; |
7e9f2b6e | 5819 | int i, ec, count; |
2c9561b5 MJ |
5820 | |
5821 | aggval = ipa_get_agg_replacements_for_node (node); | |
7e9f2b6e MJ |
5822 | if (!aggval) |
5823 | return true; | |
5824 | ||
a4a3cdd0 MJ |
5825 | ipa_node_params *clone_node_info = ipa_node_params_sum->get (node); |
5826 | count = ipa_get_param_count (clone_node_info); | |
5827 | ec = ipa_get_cs_argument_count (ipa_edge_args_sum->get (cs)); | |
7e9f2b6e MJ |
5828 | if (ec < count) |
5829 | for (struct ipa_agg_replacement_value *av = aggval; av; av = av->next) | |
5830 | if (aggval->index >= ec) | |
5831 | return false; | |
5832 | ||
a4a3cdd0 MJ |
5833 | ipa_node_params *orig_node_info |
5834 | = ipa_node_params_sum->get (clone_node_info->ipcp_orig_node); | |
7e9f2b6e MJ |
5835 | |
5836 | for (i = 0; i < count; i++) | |
2c9561b5 | 5837 | { |
99b1c316 | 5838 | class ipcp_param_lattices *plats; |
7e9f2b6e MJ |
5839 | bool interesting = false; |
5840 | for (struct ipa_agg_replacement_value *av = aggval; av; av = av->next) | |
5841 | if (aggval->index == i) | |
5842 | { | |
5843 | interesting = true; | |
5844 | break; | |
5845 | } | |
5846 | if (!interesting) | |
5847 | continue; | |
5848 | ||
9576e7b1 | 5849 | plats = ipa_get_parm_lattices (orig_node_info, aggval->index); |
7e9f2b6e | 5850 | if (plats->aggs_bottom) |
2c9561b5 | 5851 | return false; |
2c9561b5 | 5852 | |
8bda7ce8 | 5853 | vec<ipa_agg_value> values = intersect_aggregates_with_edge (cs, i, vNULL); |
c3284718 | 5854 | if (!values.exists ()) |
2c9561b5 MJ |
5855 | return false; |
5856 | ||
7e9f2b6e MJ |
5857 | for (struct ipa_agg_replacement_value *av = aggval; av; av = av->next) |
5858 | if (aggval->index == i) | |
5859 | { | |
eb270950 | 5860 | struct ipa_agg_value *item; |
7e9f2b6e MJ |
5861 | int j; |
5862 | bool found = false; | |
5863 | FOR_EACH_VEC_ELT (values, j, item) | |
5864 | if (item->value | |
5865 | && item->offset == av->offset | |
5866 | && values_equal_for_ipcp_p (item->value, av->value)) | |
c3272a92 PCC |
5867 | { |
5868 | found = true; | |
5869 | break; | |
5870 | } | |
7e9f2b6e MJ |
5871 | if (!found) |
5872 | { | |
c3284718 | 5873 | values.release (); |
7e9f2b6e MJ |
5874 | return false; |
5875 | } | |
5876 | } | |
8bda7ce8 | 5877 | values.release (); |
2c9561b5 MJ |
5878 | } |
5879 | return true; | |
5880 | } | |
5881 | ||
310bc633 MJ |
5882 | /* Given an original NODE and a VAL for which we have already created a |
5883 | specialized clone, look whether there are incoming edges that still lead | |
5884 | into the old node but now also bring the requested value and also conform to | |
026c3cfd | 5885 | all other criteria such that they can be redirected the special node. |
310bc633 | 5886 | This function can therefore redirect the final edge in a SCC. */ |
3e66255c | 5887 | |
c0cb5055 | 5888 | template <typename valtype> |
3e66255c | 5889 | static void |
c0cb5055 | 5890 | perhaps_add_new_callers (cgraph_node *node, ipcp_value<valtype> *val) |
3e66255c | 5891 | { |
c0cb5055 | 5892 | ipcp_value_source<valtype> *src; |
3995f3a2 | 5893 | profile_count redirected_sum = profile_count::zero (); |
3e66255c | 5894 | |
310bc633 | 5895 | for (src = val->sources; src; src = src->next) |
3e66255c | 5896 | { |
310bc633 MJ |
5897 | struct cgraph_edge *cs = src->cs; |
5898 | while (cs) | |
5899 | { | |
7b668576 | 5900 | if (cgraph_edge_brings_value_p (cs, src, node, val) |
47f4756e MJ |
5901 | && cgraph_edge_brings_all_scalars_for_node (cs, val->spec_node) |
5902 | && cgraph_edge_brings_all_agg_vals_for_node (cs, val->spec_node)) | |
310bc633 | 5903 | { |
47f4756e | 5904 | if (dump_file) |
464d0118 ML |
5905 | fprintf (dump_file, " - adding an extra caller %s of %s\n", |
5906 | cs->caller->dump_name (), | |
5907 | val->spec_node->dump_name ()); | |
47f4756e | 5908 | |
6a4bad95 MJ |
5909 | cs->redirect_callee_duplicating_thunks (val->spec_node); |
5910 | val->spec_node->expand_all_artificial_thunks (); | |
1bad9c18 JH |
5911 | if (cs->count.ipa ().initialized_p ()) |
5912 | redirected_sum = redirected_sum + cs->count.ipa (); | |
310bc633 MJ |
5913 | } |
5914 | cs = get_next_cgraph_edge_clone (cs); | |
5915 | } | |
3e66255c | 5916 | } |
310bc633 | 5917 | |
e3951b03 | 5918 | if (redirected_sum.nonzero_p ()) |
310bc633 | 5919 | update_specialized_profile (val->spec_node, node, redirected_sum); |
3e66255c MJ |
5920 | } |
5921 | ||
44210a96 | 5922 | /* Return true if KNOWN_CONTEXTS contain at least one useful context. */ |
3e66255c | 5923 | |
44210a96 MJ |
5924 | static bool |
5925 | known_contexts_useful_p (vec<ipa_polymorphic_call_context> known_contexts) | |
5926 | { | |
5927 | ipa_polymorphic_call_context *ctx; | |
5928 | int i; | |
5929 | ||
5930 | FOR_EACH_VEC_ELT (known_contexts, i, ctx) | |
5931 | if (!ctx->useless_p ()) | |
5932 | return true; | |
5933 | return false; | |
5934 | } | |
5935 | ||
5936 | /* Return a copy of KNOWN_CSTS if it is not empty, otherwise return vNULL. */ | |
5937 | ||
5938 | static vec<ipa_polymorphic_call_context> | |
00dcc88a | 5939 | copy_useful_known_contexts (const vec<ipa_polymorphic_call_context> &known_contexts) |
44210a96 MJ |
5940 | { |
5941 | if (known_contexts_useful_p (known_contexts)) | |
5942 | return known_contexts.copy (); | |
5943 | else | |
5944 | return vNULL; | |
5945 | } | |
5946 | ||
9d5af1db MJ |
5947 | /* Copy known scalar values from AVALS into KNOWN_CSTS and modify the copy |
5948 | according to VAL and INDEX. If non-empty, replace KNOWN_CONTEXTS with its | |
5949 | copy too. */ | |
310bc633 | 5950 | |
518dc859 | 5951 | static void |
9d5af1db MJ |
5952 | copy_known_vectors_add_val (ipa_auto_call_arg_values *avals, |
5953 | vec<tree> *known_csts, | |
5954 | vec<ipa_polymorphic_call_context> *known_contexts, | |
5955 | ipcp_value<tree> *val, int index) | |
518dc859 | 5956 | { |
9d5af1db MJ |
5957 | *known_csts = avals->m_known_vals.copy (); |
5958 | *known_contexts = copy_useful_known_contexts (avals->m_known_contexts); | |
44210a96 MJ |
5959 | (*known_csts)[index] = val->value; |
5960 | } | |
518dc859 | 5961 | |
9d5af1db MJ |
5962 | /* Copy known scalar values from AVALS into KNOWN_CSTS. Similarly, copy |
5963 | contexts to KNOWN_CONTEXTS and modify the copy according to VAL and | |
5964 | INDEX. */ | |
44210a96 MJ |
5965 | |
5966 | static void | |
9d5af1db MJ |
5967 | copy_known_vectors_add_val (ipa_auto_call_arg_values *avals, |
5968 | vec<tree> *known_csts, | |
5969 | vec<ipa_polymorphic_call_context> *known_contexts, | |
5970 | ipcp_value<ipa_polymorphic_call_context> *val, | |
5971 | int index) | |
5972 | { | |
5973 | *known_csts = avals->m_known_vals.copy (); | |
5974 | *known_contexts = avals->m_known_contexts.copy (); | |
44210a96 | 5975 | (*known_contexts)[index] = val->value; |
310bc633 | 5976 | } |
5e45130d | 5977 | |
44210a96 MJ |
5978 | /* Return true if OFFSET indicates this was not an aggregate value or there is |
5979 | a replacement equivalent to VALUE, INDEX and OFFSET among those in the | |
5980 | AGGVALS list. */ | |
2c9561b5 MJ |
5981 | |
5982 | DEBUG_FUNCTION bool | |
44210a96 MJ |
5983 | ipcp_val_agg_replacement_ok_p (ipa_agg_replacement_value *aggvals, |
5984 | int index, HOST_WIDE_INT offset, tree value) | |
2c9561b5 | 5985 | { |
44210a96 MJ |
5986 | if (offset == -1) |
5987 | return true; | |
5988 | ||
2c9561b5 MJ |
5989 | while (aggvals) |
5990 | { | |
5991 | if (aggvals->index == index | |
5992 | && aggvals->offset == offset | |
5993 | && values_equal_for_ipcp_p (aggvals->value, value)) | |
5994 | return true; | |
5995 | aggvals = aggvals->next; | |
5996 | } | |
5997 | return false; | |
5998 | } | |
5999 | ||
f25ae20e | 6000 | /* Return true if offset is minus one because source of a polymorphic context |
44210a96 MJ |
6001 | cannot be an aggregate value. */ |
6002 | ||
6003 | DEBUG_FUNCTION bool | |
6004 | ipcp_val_agg_replacement_ok_p (ipa_agg_replacement_value *, | |
6005 | int , HOST_WIDE_INT offset, | |
6006 | ipa_polymorphic_call_context) | |
6007 | { | |
6008 | return offset == -1; | |
6009 | } | |
6010 | ||
9d5af1db MJ |
6011 | /* Decide whether to create a special version of NODE for value VAL of |
6012 | parameter at the given INDEX. If OFFSET is -1, the value is for the | |
6013 | parameter itself, otherwise it is stored at the given OFFSET of the | |
d1e2e4f9 MJ |
6014 | parameter. AVALS describes the other already known values. SELF_GEN_CLONES |
6015 | is a vector which contains clones created for self-recursive calls with an | |
6016 | arithmetic pass-through jump function. */ | |
2c9561b5 | 6017 | |
c0cb5055 | 6018 | template <typename valtype> |
2c9561b5 MJ |
6019 | static bool |
6020 | decide_about_value (struct cgraph_node *node, int index, HOST_WIDE_INT offset, | |
d1e2e4f9 MJ |
6021 | ipcp_value<valtype> *val, ipa_auto_call_arg_values *avals, |
6022 | vec<cgraph_node *> *self_gen_clones) | |
2c9561b5 MJ |
6023 | { |
6024 | struct ipa_agg_replacement_value *aggvals; | |
b86aedb0 MJ |
6025 | int caller_count; |
6026 | sreal freq_sum; | |
d1e2e4f9 | 6027 | profile_count count_sum, rec_count_sum; |
d52f5295 | 6028 | vec<cgraph_edge *> callers; |
2c9561b5 MJ |
6029 | |
6030 | if (val->spec_node) | |
6031 | { | |
6032 | perhaps_add_new_callers (node, val); | |
6033 | return false; | |
6034 | } | |
f7725a48 | 6035 | else if (val->local_size_cost + overall_size > get_max_overall_size (node)) |
2c9561b5 MJ |
6036 | { |
6037 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
6038 | fprintf (dump_file, " Ignoring candidate value because " | |
f7725a48 | 6039 | "maximum unit size would be reached with %li.\n", |
2c9561b5 MJ |
6040 | val->local_size_cost + overall_size); |
6041 | return false; | |
6042 | } | |
d1e2e4f9 MJ |
6043 | else if (!get_info_about_necessary_edges (val, node, &freq_sum, &caller_count, |
6044 | &rec_count_sum, &count_sum)) | |
2c9561b5 MJ |
6045 | return false; |
6046 | ||
86deadf8 MJ |
6047 | if (!dbg_cnt (ipa_cp_values)) |
6048 | return false; | |
6049 | ||
d1e2e4f9 MJ |
6050 | if (val->self_recursion_generated_p ()) |
6051 | { | |
6052 | /* The edge counts in this case might not have been adjusted yet. | |
6053 | Nevertleless, even if they were it would be only a guesswork which we | |
6054 | can do now. The recursive part of the counts can be derived from the | |
6055 | count of the original node anyway. */ | |
6056 | if (node->count.ipa ().nonzero_p ()) | |
6057 | { | |
6058 | unsigned dem = self_gen_clones->length () + 1; | |
6059 | rec_count_sum = node->count.ipa ().apply_scale (1, dem); | |
6060 | } | |
6061 | else | |
6062 | rec_count_sum = profile_count::zero (); | |
6063 | } | |
6064 | ||
6065 | /* get_info_about_necessary_edges only sums up ipa counts. */ | |
6066 | count_sum += rec_count_sum; | |
6067 | ||
2c9561b5 MJ |
6068 | if (dump_file && (dump_flags & TDF_DETAILS)) |
6069 | { | |
6070 | fprintf (dump_file, " - considering value "); | |
6071 | print_ipcp_constant_value (dump_file, val->value); | |
0e8853ee | 6072 | fprintf (dump_file, " for "); |
a4a3cdd0 | 6073 | ipa_dump_param (dump_file, ipa_node_params_sum->get (node), index); |
2c9561b5 MJ |
6074 | if (offset != -1) |
6075 | fprintf (dump_file, ", offset: " HOST_WIDE_INT_PRINT_DEC, offset); | |
6076 | fprintf (dump_file, " (caller_count: %i)\n", caller_count); | |
6077 | } | |
6078 | ||
6079 | if (!good_cloning_opportunity_p (node, val->local_time_benefit, | |
6080 | freq_sum, count_sum, | |
6081 | val->local_size_cost) | |
a6a0db7d MJ |
6082 | && !good_cloning_opportunity_p (node, val->prop_time_benefit, |
6083 | freq_sum, count_sum, val->prop_size_cost)) | |
2c9561b5 MJ |
6084 | return false; |
6085 | ||
6086 | if (dump_file) | |
464d0118 ML |
6087 | fprintf (dump_file, " Creating a specialized node of %s.\n", |
6088 | node->dump_name ()); | |
2c9561b5 | 6089 | |
9d5af1db MJ |
6090 | vec<tree> known_csts; |
6091 | vec<ipa_polymorphic_call_context> known_contexts; | |
6092 | ||
47f4756e | 6093 | callers = gather_edges_for_value (val, node, caller_count); |
2c9561b5 | 6094 | if (offset == -1) |
9d5af1db | 6095 | copy_known_vectors_add_val (avals, &known_csts, &known_contexts, val, index); |
44210a96 MJ |
6096 | else |
6097 | { | |
9d5af1db MJ |
6098 | known_csts = avals->m_known_vals.copy (); |
6099 | known_contexts = copy_useful_known_contexts (avals->m_known_contexts); | |
44210a96 MJ |
6100 | } |
6101 | find_more_scalar_values_for_callers_subset (node, known_csts, callers); | |
6102 | find_more_contexts_for_caller_subset (node, &known_contexts, callers); | |
2c9561b5 | 6103 | aggvals = find_aggregate_values_for_callers_subset (node, callers); |
44210a96 MJ |
6104 | gcc_checking_assert (ipcp_val_agg_replacement_ok_p (aggvals, index, |
6105 | offset, val->value)); | |
6106 | val->spec_node = create_specialized_node (node, known_csts, known_contexts, | |
6107 | aggvals, callers); | |
d1e2e4f9 MJ |
6108 | |
6109 | if (val->self_recursion_generated_p ()) | |
6110 | self_gen_clones->safe_push (val->spec_node); | |
6111 | else | |
6112 | update_profiling_info (node, val->spec_node); | |
6113 | ||
265af872 | 6114 | callers.release (); |
2c9561b5 | 6115 | overall_size += val->local_size_cost; |
91153e0a MJ |
6116 | if (dump_file && (dump_flags & TDF_DETAILS)) |
6117 | fprintf (dump_file, " overall size reached %li\n", | |
6118 | overall_size); | |
2c9561b5 MJ |
6119 | |
6120 | /* TODO: If for some lattice there is only one other known value | |
6121 | left, make a special node for it too. */ | |
6122 | ||
6123 | return true; | |
6124 | } | |
5e45130d | 6125 | |
310bc633 | 6126 | /* Decide whether and what specialized clones of NODE should be created. */ |
5e45130d | 6127 | |
310bc633 MJ |
6128 | static bool |
6129 | decide_whether_version_node (struct cgraph_node *node) | |
6130 | { | |
a4a3cdd0 | 6131 | ipa_node_params *info = ipa_node_params_sum->get (node); |
310bc633 | 6132 | int i, count = ipa_get_param_count (info); |
310bc633 | 6133 | bool ret = false; |
5e45130d | 6134 | |
310bc633 MJ |
6135 | if (count == 0) |
6136 | return false; | |
5e45130d | 6137 | |
310bc633 | 6138 | if (dump_file && (dump_flags & TDF_DETAILS)) |
464d0118 ML |
6139 | fprintf (dump_file, "\nEvaluating opportunities for %s.\n", |
6140 | node->dump_name ()); | |
5e45130d | 6141 | |
d1e2e4f9 | 6142 | auto_vec <cgraph_node *, 9> self_gen_clones; |
9d5af1db MJ |
6143 | ipa_auto_call_arg_values avals; |
6144 | gather_context_independent_values (info, &avals, false, NULL); | |
5e45130d | 6145 | |
155c9907 | 6146 | for (i = 0; i < count;i++) |
310bc633 | 6147 | { |
99b1c316 | 6148 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 | 6149 | ipcp_lattice<tree> *lat = &plats->itself; |
44210a96 | 6150 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; |
5e45130d | 6151 | |
2c9561b5 | 6152 | if (!lat->bottom |
9d5af1db | 6153 | && !avals.m_known_vals[i]) |
44210a96 MJ |
6154 | { |
6155 | ipcp_value<tree> *val; | |
6156 | for (val = lat->values; val; val = val->next) | |
d1e2e4f9 MJ |
6157 | ret |= decide_about_value (node, i, -1, val, &avals, |
6158 | &self_gen_clones); | |
44210a96 | 6159 | } |
61e03ffc | 6160 | |
eb20b778 | 6161 | if (!plats->aggs_bottom) |
518dc859 | 6162 | { |
2c9561b5 | 6163 | struct ipcp_agg_lattice *aglat; |
c0cb5055 | 6164 | ipcp_value<tree> *val; |
2c9561b5 MJ |
6165 | for (aglat = plats->aggs; aglat; aglat = aglat->next) |
6166 | if (!aglat->bottom && aglat->values | |
9d5af1db MJ |
6167 | /* If the following is false, the one value has been considered |
6168 | for cloning for all contexts. */ | |
2c9561b5 | 6169 | && (plats->aggs_contain_variable |
c0cb5055 | 6170 | || !aglat->is_single_const ())) |
2c9561b5 | 6171 | for (val = aglat->values; val; val = val->next) |
d1e2e4f9 MJ |
6172 | ret |= decide_about_value (node, i, aglat->offset, val, &avals, |
6173 | &self_gen_clones); | |
cc58ceee | 6174 | } |
44210a96 MJ |
6175 | |
6176 | if (!ctxlat->bottom | |
9d5af1db | 6177 | && avals.m_known_contexts[i].useless_p ()) |
44210a96 MJ |
6178 | { |
6179 | ipcp_value<ipa_polymorphic_call_context> *val; | |
6180 | for (val = ctxlat->values; val; val = val->next) | |
d1e2e4f9 MJ |
6181 | ret |= decide_about_value (node, i, -1, val, &avals, |
6182 | &self_gen_clones); | |
44210a96 | 6183 | } |
310bc633 | 6184 | } |
cc58ceee | 6185 | |
d1e2e4f9 MJ |
6186 | if (!self_gen_clones.is_empty ()) |
6187 | { | |
6188 | self_gen_clones.safe_push (node); | |
6189 | update_counts_for_self_gen_clones (node, self_gen_clones); | |
6190 | } | |
6191 | ||
eb20b778 | 6192 | if (info->do_clone_for_all_contexts) |
310bc633 | 6193 | { |
86deadf8 MJ |
6194 | if (!dbg_cnt (ipa_cp_values)) |
6195 | { | |
6196 | info->do_clone_for_all_contexts = false; | |
6197 | return ret; | |
6198 | } | |
6199 | ||
eb20b778 | 6200 | struct cgraph_node *clone; |
265af872 | 6201 | auto_vec<cgraph_edge *> callers = node->collect_callers (); |
a0f6a8cb FX |
6202 | |
6203 | for (int i = callers.length () - 1; i >= 0; i--) | |
6204 | { | |
6205 | cgraph_edge *cs = callers[i]; | |
a4a3cdd0 | 6206 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); |
a0f6a8cb FX |
6207 | |
6208 | if (caller_info && caller_info->node_dead) | |
6209 | callers.unordered_remove (i); | |
6210 | } | |
6211 | ||
6212 | if (!adjust_callers_for_value_intersection (callers, node)) | |
6213 | { | |
6214 | /* If node is not called by anyone, or all its caller edges are | |
9d5af1db MJ |
6215 | self-recursive, the node is not really in use, no need to do |
6216 | cloning. */ | |
a0f6a8cb FX |
6217 | info->do_clone_for_all_contexts = false; |
6218 | return ret; | |
6219 | } | |
cc58ceee | 6220 | |
310bc633 | 6221 | if (dump_file) |
464d0118 ML |
6222 | fprintf (dump_file, " - Creating a specialized node of %s " |
6223 | "for all known contexts.\n", node->dump_name ()); | |
5e45130d | 6224 | |
9d5af1db MJ |
6225 | vec<tree> known_csts = avals.m_known_vals.copy (); |
6226 | vec<ipa_polymorphic_call_context> known_contexts | |
6227 | = copy_useful_known_contexts (avals.m_known_contexts); | |
7b668576 MJ |
6228 | find_more_scalar_values_for_callers_subset (node, known_csts, callers); |
6229 | find_more_contexts_for_caller_subset (node, &known_contexts, callers); | |
6230 | ipa_agg_replacement_value *aggvals | |
6231 | = find_aggregate_values_for_callers_subset (node, callers); | |
44210a96 MJ |
6232 | |
6233 | if (!known_contexts_useful_p (known_contexts)) | |
6234 | { | |
6235 | known_contexts.release (); | |
6236 | known_contexts = vNULL; | |
6237 | } | |
6238 | clone = create_specialized_node (node, known_csts, known_contexts, | |
7b668576 | 6239 | aggvals, callers); |
eb20b778 | 6240 | info->do_clone_for_all_contexts = false; |
a4a3cdd0 | 6241 | ipa_node_params_sum->get (clone)->is_all_contexts_clone = true; |
310bc633 MJ |
6242 | ret = true; |
6243 | } | |
5e45130d | 6244 | |
310bc633 MJ |
6245 | return ret; |
6246 | } | |
9187e02d | 6247 | |
310bc633 | 6248 | /* Transitively mark all callees of NODE within the same SCC as not dead. */ |
3949c4a7 | 6249 | |
310bc633 MJ |
6250 | static void |
6251 | spread_undeadness (struct cgraph_node *node) | |
6252 | { | |
6253 | struct cgraph_edge *cs; | |
5e45130d | 6254 | |
310bc633 | 6255 | for (cs = node->callees; cs; cs = cs->next_callee) |
4cb13597 | 6256 | if (ipa_edge_within_scc (cs)) |
310bc633 MJ |
6257 | { |
6258 | struct cgraph_node *callee; | |
99b1c316 | 6259 | class ipa_node_params *info; |
129a37fc | 6260 | |
d52f5295 | 6261 | callee = cs->callee->function_symbol (NULL); |
a4a3cdd0 | 6262 | info = ipa_node_params_sum->get (callee); |
5e45130d | 6263 | |
3c4fa8a8 | 6264 | if (info && info->node_dead) |
310bc633 MJ |
6265 | { |
6266 | info->node_dead = 0; | |
6267 | spread_undeadness (callee); | |
6268 | } | |
6269 | } | |
6270 | } | |
6271 | ||
6272 | /* Return true if NODE has a caller from outside of its SCC that is not | |
6273 | dead. Worker callback for cgraph_for_node_and_aliases. */ | |
6274 | ||
6275 | static bool | |
6276 | has_undead_caller_from_outside_scc_p (struct cgraph_node *node, | |
155c9907 | 6277 | void *data ATTRIBUTE_UNUSED) |
310bc633 MJ |
6278 | { |
6279 | struct cgraph_edge *cs; | |
6280 | ||
6281 | for (cs = node->callers; cs; cs = cs->next_caller) | |
67f3791f | 6282 | if (cs->caller->thunk |
d52f5295 ML |
6283 | && cs->caller->call_for_symbol_thunks_and_aliases |
6284 | (has_undead_caller_from_outside_scc_p, NULL, true)) | |
310bc633 | 6285 | return true; |
a4a3cdd0 MJ |
6286 | else if (!ipa_edge_within_scc (cs)) |
6287 | { | |
6288 | ipa_node_params *caller_info = ipa_node_params_sum->get (cs->caller); | |
6289 | if (!caller_info /* Unoptimized caller are like dead ones. */ | |
6290 | || !caller_info->node_dead) | |
cbf10ac5 | 6291 | return true; |
a4a3cdd0 | 6292 | } |
310bc633 MJ |
6293 | return false; |
6294 | } | |
6295 | ||
6296 | ||
6297 | /* Identify nodes within the same SCC as NODE which are no longer needed | |
6298 | because of new clones and will be removed as unreachable. */ | |
6299 | ||
6300 | static void | |
6301 | identify_dead_nodes (struct cgraph_node *node) | |
6302 | { | |
6303 | struct cgraph_node *v; | |
155c9907 | 6304 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
a4a3cdd0 MJ |
6305 | if (v->local) |
6306 | { | |
6307 | ipa_node_params *info = ipa_node_params_sum->get (v); | |
6308 | if (info | |
6309 | && !v->call_for_symbol_thunks_and_aliases | |
6310 | (has_undead_caller_from_outside_scc_p, NULL, true)) | |
6311 | info->node_dead = 1; | |
6312 | } | |
310bc633 | 6313 | |
155c9907 | 6314 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
a4a3cdd0 MJ |
6315 | { |
6316 | ipa_node_params *info = ipa_node_params_sum->get (v); | |
6317 | if (info && !info->node_dead) | |
6318 | spread_undeadness (v); | |
6319 | } | |
310bc633 MJ |
6320 | |
6321 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
6322 | { | |
155c9907 | 6323 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
a4a3cdd0 MJ |
6324 | if (ipa_node_params_sum->get (v) |
6325 | && ipa_node_params_sum->get (v)->node_dead) | |
6326 | fprintf (dump_file, " Marking node as dead: %s.\n", | |
6327 | v->dump_name ()); | |
5e45130d | 6328 | } |
310bc633 MJ |
6329 | } |
6330 | ||
6331 | /* The decision stage. Iterate over the topological order of call graph nodes | |
6332 | TOPO and make specialized clones if deemed beneficial. */ | |
6333 | ||
6334 | static void | |
99b1c316 | 6335 | ipcp_decision_stage (class ipa_topo_info *topo) |
310bc633 MJ |
6336 | { |
6337 | int i; | |
6338 | ||
6339 | if (dump_file) | |
6340 | fprintf (dump_file, "\nIPA decision stage:\n\n"); | |
5e45130d | 6341 | |
310bc633 | 6342 | for (i = topo->nnodes - 1; i >= 0; i--) |
5e45130d | 6343 | { |
310bc633 MJ |
6344 | struct cgraph_node *node = topo->order[i]; |
6345 | bool change = false, iterate = true; | |
6346 | ||
6347 | while (iterate) | |
6348 | { | |
6349 | struct cgraph_node *v; | |
6350 | iterate = false; | |
155c9907 | 6351 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
d52f5295 | 6352 | if (v->has_gimple_body_p () |
310bc633 MJ |
6353 | && ipcp_versionable_function_p (v)) |
6354 | iterate |= decide_whether_version_node (v); | |
6355 | ||
6356 | change |= iterate; | |
6357 | } | |
6358 | if (change) | |
6359 | identify_dead_nodes (node); | |
518dc859 | 6360 | } |
518dc859 RL |
6361 | } |
6362 | ||
209ca542 PK |
6363 | /* Look up all the bits information that we have discovered and copy it over |
6364 | to the transformation summary. */ | |
6365 | ||
6366 | static void | |
6367 | ipcp_store_bits_results (void) | |
6368 | { | |
6369 | cgraph_node *node; | |
6370 | ||
6371 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) | |
6372 | { | |
a4a3cdd0 | 6373 | ipa_node_params *info = ipa_node_params_sum->get (node); |
209ca542 PK |
6374 | bool dumped_sth = false; |
6375 | bool found_useful_result = false; | |
6376 | ||
6cf67b62 | 6377 | if (!opt_for_fn (node->decl, flag_ipa_bit_cp) || !info) |
209ca542 PK |
6378 | { |
6379 | if (dump_file) | |
6380 | fprintf (dump_file, "Not considering %s for ipa bitwise propagation " | |
15bbb5cc | 6381 | "; -fipa-bit-cp: disabled.\n", |
3629ff8a | 6382 | node->dump_name ()); |
209ca542 PK |
6383 | continue; |
6384 | } | |
6385 | ||
6386 | if (info->ipcp_orig_node) | |
a4a3cdd0 | 6387 | info = ipa_node_params_sum->get (info->ipcp_orig_node); |
68188fff MJ |
6388 | if (!info->lattices) |
6389 | /* Newly expanded artificial thunks do not have lattices. */ | |
6390 | continue; | |
209ca542 PK |
6391 | |
6392 | unsigned count = ipa_get_param_count (info); | |
6393 | for (unsigned i = 0; i < count; i++) | |
6394 | { | |
6395 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
6396 | if (plats->bits_lattice.constant_p ()) | |
6397 | { | |
6398 | found_useful_result = true; | |
6399 | break; | |
6400 | } | |
6401 | } | |
6402 | ||
155c9907 JJ |
6403 | if (!found_useful_result) |
6404 | continue; | |
209ca542 | 6405 | |
9d3e0adc ML |
6406 | ipcp_transformation_initialize (); |
6407 | ipcp_transformation *ts = ipcp_transformation_sum->get_create (node); | |
155c9907 | 6408 | vec_safe_reserve_exact (ts->bits, count); |
209ca542 | 6409 | |
155c9907 JJ |
6410 | for (unsigned i = 0; i < count; i++) |
6411 | { | |
6412 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
86cd0334 | 6413 | ipa_bits *jfbits; |
209ca542 | 6414 | |
155c9907 | 6415 | if (plats->bits_lattice.constant_p ()) |
6c2583c1 ML |
6416 | { |
6417 | jfbits | |
6418 | = ipa_get_ipa_bits_for_value (plats->bits_lattice.get_value (), | |
6419 | plats->bits_lattice.get_mask ()); | |
6420 | if (!dbg_cnt (ipa_cp_bits)) | |
6421 | jfbits = NULL; | |
6422 | } | |
155c9907 | 6423 | else |
86cd0334 | 6424 | jfbits = NULL; |
209ca542 | 6425 | |
86cd0334 MJ |
6426 | ts->bits->quick_push (jfbits); |
6427 | if (!dump_file || !jfbits) | |
155c9907 JJ |
6428 | continue; |
6429 | if (!dumped_sth) | |
6430 | { | |
464d0118 ML |
6431 | fprintf (dump_file, "Propagated bits info for function %s:\n", |
6432 | node->dump_name ()); | |
155c9907 JJ |
6433 | dumped_sth = true; |
6434 | } | |
6435 | fprintf (dump_file, " param %i: value = ", i); | |
86cd0334 | 6436 | print_hex (jfbits->value, dump_file); |
155c9907 | 6437 | fprintf (dump_file, ", mask = "); |
86cd0334 | 6438 | print_hex (jfbits->mask, dump_file); |
155c9907 JJ |
6439 | fprintf (dump_file, "\n"); |
6440 | } | |
209ca542 PK |
6441 | } |
6442 | } | |
8bc5448f KV |
6443 | |
6444 | /* Look up all VR information that we have discovered and copy it over | |
6445 | to the transformation summary. */ | |
6446 | ||
6447 | static void | |
6448 | ipcp_store_vr_results (void) | |
6449 | { | |
6450 | cgraph_node *node; | |
6451 | ||
6452 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) | |
155c9907 | 6453 | { |
a4a3cdd0 | 6454 | ipa_node_params *info = ipa_node_params_sum->get (node); |
155c9907 | 6455 | bool found_useful_result = false; |
8bc5448f | 6456 | |
a09ccc22 | 6457 | if (!info || !opt_for_fn (node->decl, flag_ipa_vrp)) |
155c9907 JJ |
6458 | { |
6459 | if (dump_file) | |
6460 | fprintf (dump_file, "Not considering %s for VR discovery " | |
6461 | "and propagate; -fipa-ipa-vrp: disabled.\n", | |
3629ff8a | 6462 | node->dump_name ()); |
155c9907 JJ |
6463 | continue; |
6464 | } | |
8bc5448f | 6465 | |
155c9907 | 6466 | if (info->ipcp_orig_node) |
a4a3cdd0 | 6467 | info = ipa_node_params_sum->get (info->ipcp_orig_node); |
68188fff MJ |
6468 | if (!info->lattices) |
6469 | /* Newly expanded artificial thunks do not have lattices. */ | |
6470 | continue; | |
8bc5448f | 6471 | |
155c9907 JJ |
6472 | unsigned count = ipa_get_param_count (info); |
6473 | for (unsigned i = 0; i < count; i++) | |
6474 | { | |
6475 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
6476 | if (!plats->m_value_range.bottom_p () | |
6477 | && !plats->m_value_range.top_p ()) | |
6478 | { | |
6479 | found_useful_result = true; | |
6480 | break; | |
6481 | } | |
6482 | } | |
6483 | if (!found_useful_result) | |
6484 | continue; | |
8bc5448f | 6485 | |
9d3e0adc ML |
6486 | ipcp_transformation_initialize (); |
6487 | ipcp_transformation *ts = ipcp_transformation_sum->get_create (node); | |
155c9907 | 6488 | vec_safe_reserve_exact (ts->m_vr, count); |
8bc5448f | 6489 | |
155c9907 JJ |
6490 | for (unsigned i = 0; i < count; i++) |
6491 | { | |
6492 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
6493 | ipa_vr vr; | |
8bc5448f | 6494 | |
155c9907 | 6495 | if (!plats->m_value_range.bottom_p () |
86deadf8 MJ |
6496 | && !plats->m_value_range.top_p () |
6497 | && dbg_cnt (ipa_cp_vr)) | |
155c9907 JJ |
6498 | { |
6499 | vr.known = true; | |
54994253 AH |
6500 | vr.type = plats->m_value_range.m_vr.kind (); |
6501 | vr.min = wi::to_wide (plats->m_value_range.m_vr.min ()); | |
6502 | vr.max = wi::to_wide (plats->m_value_range.m_vr.max ()); | |
155c9907 JJ |
6503 | } |
6504 | else | |
6505 | { | |
6506 | vr.known = false; | |
6507 | vr.type = VR_VARYING; | |
6508 | vr.min = vr.max = wi::zero (INT_TYPE_SIZE); | |
6509 | } | |
6510 | ts->m_vr->quick_push (vr); | |
6511 | } | |
6512 | } | |
8bc5448f KV |
6513 | } |
6514 | ||
518dc859 | 6515 | /* The IPCP driver. */ |
310bc633 | 6516 | |
3cc1cccc | 6517 | static unsigned int |
518dc859 RL |
6518 | ipcp_driver (void) |
6519 | { | |
99b1c316 | 6520 | class ipa_topo_info topo; |
310bc633 | 6521 | |
1ac2bdb4 ML |
6522 | if (edge_clone_summaries == NULL) |
6523 | edge_clone_summaries = new edge_clone_summary_t (symtab); | |
6524 | ||
310bc633 MJ |
6525 | ipa_check_create_node_params (); |
6526 | ipa_check_create_edge_args (); | |
9e0b0ec3 | 6527 | clone_num_suffixes = new hash_map<const char *, unsigned>; |
aef83682 | 6528 | |
518dc859 RL |
6529 | if (dump_file) |
6530 | { | |
ca30a539 JH |
6531 | fprintf (dump_file, "\nIPA structures before propagation:\n"); |
6532 | if (dump_flags & TDF_DETAILS) | |
155c9907 | 6533 | ipa_print_all_params (dump_file); |
ca30a539 | 6534 | ipa_print_all_jump_functions (dump_file); |
518dc859 | 6535 | } |
310bc633 MJ |
6536 | |
6537 | /* Topological sort. */ | |
6538 | build_toporder_info (&topo); | |
6539 | /* Do the interprocedural propagation. */ | |
6540 | ipcp_propagate_stage (&topo); | |
6541 | /* Decide what constant propagation and cloning should be performed. */ | |
6542 | ipcp_decision_stage (&topo); | |
209ca542 PK |
6543 | /* Store results of bits propagation. */ |
6544 | ipcp_store_bits_results (); | |
8bc5448f KV |
6545 | /* Store results of value range propagation. */ |
6546 | ipcp_store_vr_results (); | |
310bc633 | 6547 | |
518dc859 | 6548 | /* Free all IPCP structures. */ |
53aedcce | 6549 | delete clone_num_suffixes; |
310bc633 | 6550 | free_toporder_info (&topo); |
1ac2bdb4 | 6551 | delete edge_clone_summaries; |
e67343d7 | 6552 | edge_clone_summaries = NULL; |
e33c6cd6 | 6553 | ipa_free_all_structures_after_ipa_cp (); |
518dc859 RL |
6554 | if (dump_file) |
6555 | fprintf (dump_file, "\nIPA constant propagation end\n"); | |
c2924966 | 6556 | return 0; |
518dc859 RL |
6557 | } |
6558 | ||
3949c4a7 MJ |
6559 | /* Initialization and computation of IPCP data structures. This is the initial |
6560 | intraprocedural analysis of functions, which gathers information to be | |
6561 | propagated later on. */ | |
6562 | ||
129a37fc JH |
6563 | static void |
6564 | ipcp_generate_summary (void) | |
6565 | { | |
3949c4a7 MJ |
6566 | struct cgraph_node *node; |
6567 | ||
129a37fc JH |
6568 | if (dump_file) |
6569 | fprintf (dump_file, "\nIPA constant propagation start:\n"); | |
129a37fc | 6570 | ipa_register_cgraph_hooks (); |
3949c4a7 | 6571 | |
c47d0034 | 6572 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) |
7e729474 | 6573 | ipa_analyze_node (node); |
129a37fc JH |
6574 | } |
6575 | ||
27a4cd48 DM |
6576 | namespace { |
6577 | ||
6578 | const pass_data pass_data_ipa_cp = | |
6579 | { | |
6580 | IPA_PASS, /* type */ | |
6581 | "cp", /* name */ | |
6582 | OPTGROUP_NONE, /* optinfo_flags */ | |
27a4cd48 DM |
6583 | TV_IPA_CONSTANT_PROP, /* tv_id */ |
6584 | 0, /* properties_required */ | |
6585 | 0, /* properties_provided */ | |
6586 | 0, /* properties_destroyed */ | |
6587 | 0, /* todo_flags_start */ | |
6588 | ( TODO_dump_symtab | TODO_remove_functions ), /* todo_flags_finish */ | |
518dc859 | 6589 | }; |
27a4cd48 DM |
6590 | |
6591 | class pass_ipa_cp : public ipa_opt_pass_d | |
6592 | { | |
6593 | public: | |
c3284718 RS |
6594 | pass_ipa_cp (gcc::context *ctxt) |
6595 | : ipa_opt_pass_d (pass_data_ipa_cp, ctxt, | |
6596 | ipcp_generate_summary, /* generate_summary */ | |
568de14d ML |
6597 | NULL, /* write_summary */ |
6598 | NULL, /* read_summary */ | |
04be694e | 6599 | ipcp_write_transformation_summaries, /* |
c3284718 | 6600 | write_optimization_summary */ |
04be694e | 6601 | ipcp_read_transformation_summaries, /* |
c3284718 RS |
6602 | read_optimization_summary */ |
6603 | NULL, /* stmt_fixup */ | |
6604 | 0, /* function_transform_todo_flags_start */ | |
6605 | ipcp_transform_function, /* function_transform */ | |
6606 | NULL) /* variable_transform */ | |
27a4cd48 DM |
6607 | {} |
6608 | ||
6609 | /* opt_pass methods: */ | |
1a3d085c TS |
6610 | virtual bool gate (function *) |
6611 | { | |
6612 | /* FIXME: We should remove the optimize check after we ensure we never run | |
6613 | IPA passes when not optimizing. */ | |
2bf86c84 | 6614 | return (flag_ipa_cp && optimize) || in_lto_p; |
1a3d085c TS |
6615 | } |
6616 | ||
be55bfe6 | 6617 | virtual unsigned int execute (function *) { return ipcp_driver (); } |
27a4cd48 DM |
6618 | |
6619 | }; // class pass_ipa_cp | |
6620 | ||
6621 | } // anon namespace | |
6622 | ||
6623 | ipa_opt_pass_d * | |
6624 | make_pass_ipa_cp (gcc::context *ctxt) | |
6625 | { | |
6626 | return new pass_ipa_cp (ctxt); | |
6627 | } | |
3edf64aa | 6628 | |
e53b6e56 | 6629 | /* Reset all state within ipa-cp.cc so that we can rerun the compiler |
3edf64aa DM |
6630 | within the same process. For use by toplev::finalize. */ |
6631 | ||
6632 | void | |
6633 | ipa_cp_c_finalize (void) | |
6634 | { | |
ab100825 | 6635 | base_count = profile_count::uninitialized (); |
3edf64aa | 6636 | overall_size = 0; |
f7725a48 | 6637 | orig_overall_size = 0; |
12e088ba | 6638 | ipcp_free_transformation_sum (); |
3edf64aa | 6639 | } |