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518dc859 | 1 | /* Interprocedural constant propagation |
99dee823 | 2 | Copyright (C) 2005-2021 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 MJ |
98 | |
99 | This stage is currently performed by call graph code (mainly in cgraphunit.c | |
100 | and tree-inline.c) according to instructions inserted to the call graph by | |
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" |
9fdcd34e | 109 | #include "predict.h" |
c582198b | 110 | #include "alloc-pool.h" |
957060b5 AM |
111 | #include "tree-pass.h" |
112 | #include "cgraph.h" | |
113 | #include "diagnostic.h" | |
957060b5 AM |
114 | #include "fold-const.h" |
115 | #include "gimple-fold.h" | |
dd912cb8 | 116 | #include "symbol-summary.h" |
8bc5448f | 117 | #include "tree-vrp.h" |
518dc859 | 118 | #include "ipa-prop.h" |
cf835838 | 119 | #include "tree-pretty-print.h" |
3cc1cccc | 120 | #include "tree-inline.h" |
27d020cf | 121 | #include "ipa-fnsummary.h" |
310bc633 | 122 | #include "ipa-utils.h" |
209ca542 | 123 | #include "tree-ssa-ccp.h" |
314e6352 ML |
124 | #include "stringpool.h" |
125 | #include "attribs.h" | |
6c2583c1 | 126 | #include "dbgcnt.h" |
ae7a23a3 | 127 | #include "symtab-clones.h" |
518dc859 | 128 | |
c0cb5055 | 129 | template <typename valtype> class ipcp_value; |
ca30a539 | 130 | |
310bc633 | 131 | /* Describes a particular source for an IPA-CP value. */ |
ca30a539 | 132 | |
c0cb5055 | 133 | template <typename valtype> |
6c1dae73 | 134 | struct ipcp_value_source |
310bc633 | 135 | { |
c0cb5055 | 136 | public: |
2c9561b5 MJ |
137 | /* Aggregate offset of the source, negative if the source is scalar value of |
138 | the argument itself. */ | |
139 | HOST_WIDE_INT offset; | |
310bc633 | 140 | /* The incoming edge that brought the value. */ |
c0cb5055 | 141 | cgraph_edge *cs; |
310bc633 MJ |
142 | /* If the jump function that resulted into his value was a pass-through or an |
143 | ancestor, this is the ipcp_value of the caller from which the described | |
144 | value has been derived. Otherwise it is NULL. */ | |
c0cb5055 | 145 | ipcp_value<valtype> *val; |
310bc633 | 146 | /* Next pointer in a linked list of sources of a value. */ |
c0cb5055 | 147 | ipcp_value_source *next; |
310bc633 MJ |
148 | /* If the jump function that resulted into his value was a pass-through or an |
149 | ancestor, this is the index of the parameter of the caller the jump | |
150 | function references. */ | |
151 | int index; | |
152 | }; | |
ca30a539 | 153 | |
c0cb5055 MJ |
154 | /* Common ancestor for all ipcp_value instantiations. */ |
155 | ||
156 | class ipcp_value_base | |
157 | { | |
158 | public: | |
b86aedb0 MJ |
159 | /* Time benefit and that specializing the function for this value would bring |
160 | about in this function alone. */ | |
161 | sreal local_time_benefit; | |
162 | /* Time benefit that specializing the function for this value can bring about | |
163 | in it's callees. */ | |
164 | sreal prop_time_benefit; | |
165 | /* Size cost that specializing the function for this value would bring about | |
166 | in this function alone. */ | |
167 | int local_size_cost; | |
168 | /* Size cost that specializing the function for this value can bring about in | |
169 | it's callees. */ | |
170 | int prop_size_cost; | |
c8fb20d8 YG |
171 | |
172 | ipcp_value_base () | |
b86aedb0 MJ |
173 | : local_time_benefit (0), prop_time_benefit (0), |
174 | local_size_cost (0), prop_size_cost (0) {} | |
c0cb5055 MJ |
175 | }; |
176 | ||
310bc633 | 177 | /* Describes one particular value stored in struct ipcp_lattice. */ |
ca30a539 | 178 | |
c0cb5055 MJ |
179 | template <typename valtype> |
180 | class ipcp_value : public ipcp_value_base | |
518dc859 | 181 | { |
c0cb5055 MJ |
182 | public: |
183 | /* The actual value for the given parameter. */ | |
184 | valtype value; | |
310bc633 | 185 | /* The list of sources from which this value originates. */ |
c0cb5055 | 186 | ipcp_value_source <valtype> *sources; |
310bc633 | 187 | /* Next pointers in a linked list of all values in a lattice. */ |
c0cb5055 | 188 | ipcp_value *next; |
310bc633 MJ |
189 | /* Next pointers in a linked list of values in a strongly connected component |
190 | of values. */ | |
c0cb5055 | 191 | ipcp_value *scc_next; |
310bc633 MJ |
192 | /* Next pointers in a linked list of SCCs of values sorted topologically |
193 | according their sources. */ | |
c0cb5055 | 194 | ipcp_value *topo_next; |
310bc633 MJ |
195 | /* A specialized node created for this value, NULL if none has been (so far) |
196 | created. */ | |
c0cb5055 | 197 | cgraph_node *spec_node; |
310bc633 MJ |
198 | /* Depth first search number and low link for topological sorting of |
199 | values. */ | |
200 | int dfs, low_link; | |
f25ae20e | 201 | /* True if this value is currently on the topo-sort stack. */ |
310bc633 | 202 | bool on_stack; |
c0cb5055 | 203 | |
c8fb20d8 YG |
204 | ipcp_value() |
205 | : sources (0), next (0), scc_next (0), topo_next (0), | |
206 | spec_node (0), dfs (0), low_link (0), on_stack (false) {} | |
207 | ||
c0cb5055 MJ |
208 | void add_source (cgraph_edge *cs, ipcp_value *src_val, int src_idx, |
209 | HOST_WIDE_INT offset); | |
310bc633 | 210 | }; |
518dc859 | 211 | |
2c9561b5 | 212 | /* Lattice describing potential values of a formal parameter of a function, or |
5764ee3c | 213 | a part of an aggregate. TOP is represented by a lattice with zero values |
2c9561b5 MJ |
214 | and with contains_variable and bottom flags cleared. BOTTOM is represented |
215 | by a lattice with the bottom flag set. In that case, values and | |
310bc633 MJ |
216 | contains_variable flag should be disregarded. */ |
217 | ||
c0cb5055 | 218 | template <typename valtype> |
6c1dae73 | 219 | struct ipcp_lattice |
518dc859 | 220 | { |
c0cb5055 | 221 | public: |
310bc633 MJ |
222 | /* The list of known values and types in this lattice. Note that values are |
223 | not deallocated if a lattice is set to bottom because there may be value | |
224 | sources referencing them. */ | |
c0cb5055 | 225 | ipcp_value<valtype> *values; |
310bc633 MJ |
226 | /* Number of known values and types in this lattice. */ |
227 | int values_count; | |
2c9561b5 | 228 | /* The lattice contains a variable component (in addition to values). */ |
310bc633 MJ |
229 | bool contains_variable; |
230 | /* The value of the lattice is bottom (i.e. variable and unusable for any | |
231 | propagation). */ | |
232 | bool bottom; | |
c0cb5055 MJ |
233 | |
234 | inline bool is_single_const (); | |
235 | inline bool set_to_bottom (); | |
236 | inline bool set_contains_variable (); | |
237 | bool add_value (valtype newval, cgraph_edge *cs, | |
238 | ipcp_value<valtype> *src_val = NULL, | |
9b14fc33 FX |
239 | int src_idx = 0, HOST_WIDE_INT offset = -1, |
240 | ipcp_value<valtype> **val_p = NULL, | |
241 | bool unlimited = false); | |
c0cb5055 | 242 | void print (FILE * f, bool dump_sources, bool dump_benefits); |
2c9561b5 MJ |
243 | }; |
244 | ||
c0cb5055 MJ |
245 | /* Lattice of tree values with an offset to describe a part of an |
246 | aggregate. */ | |
2c9561b5 | 247 | |
6c1dae73 | 248 | struct ipcp_agg_lattice : public ipcp_lattice<tree> |
2c9561b5 | 249 | { |
c0cb5055 | 250 | public: |
2c9561b5 MJ |
251 | /* Offset that is being described by this lattice. */ |
252 | HOST_WIDE_INT offset; | |
253 | /* Size so that we don't have to re-compute it every time we traverse the | |
254 | list. Must correspond to TYPE_SIZE of all lat values. */ | |
255 | HOST_WIDE_INT size; | |
256 | /* Next element of the linked list. */ | |
257 | struct ipcp_agg_lattice *next; | |
258 | }; | |
259 | ||
209ca542 PK |
260 | /* Lattice of known bits, only capable of holding one value. |
261 | Bitwise constant propagation propagates which bits of a | |
262 | value are constant. | |
263 | For eg: | |
264 | int f(int x) | |
265 | { | |
266 | return some_op (x); | |
267 | } | |
268 | ||
269 | int f1(int y) | |
270 | { | |
271 | if (cond) | |
272 | return f (y & 0xff); | |
273 | else | |
274 | return f (y & 0xf); | |
275 | } | |
276 | ||
277 | In the above case, the param 'x' will always have all | |
278 | the bits (except the bits in lsb) set to 0. | |
279 | Hence the mask of 'x' would be 0xff. The mask | |
280 | reflects that the bits in lsb are unknown. | |
281 | The actual propagated value is given by m_value & ~m_mask. */ | |
282 | ||
283 | class ipcp_bits_lattice | |
284 | { | |
285 | public: | |
286 | bool bottom_p () { return m_lattice_val == IPA_BITS_VARYING; } | |
287 | bool top_p () { return m_lattice_val == IPA_BITS_UNDEFINED; } | |
288 | bool constant_p () { return m_lattice_val == IPA_BITS_CONSTANT; } | |
289 | bool set_to_bottom (); | |
155c9907 JJ |
290 | bool set_to_constant (widest_int, widest_int); |
291 | ||
209ca542 PK |
292 | widest_int get_value () { return m_value; } |
293 | widest_int get_mask () { return m_mask; } | |
294 | ||
295 | bool meet_with (ipcp_bits_lattice& other, unsigned, signop, | |
296 | enum tree_code, tree); | |
297 | ||
298 | bool meet_with (widest_int, widest_int, unsigned); | |
299 | ||
300 | void print (FILE *); | |
301 | ||
302 | private: | |
303 | enum { IPA_BITS_UNDEFINED, IPA_BITS_CONSTANT, IPA_BITS_VARYING } m_lattice_val; | |
304 | ||
305 | /* Similar to ccp_lattice_t, mask represents which bits of value are constant. | |
306 | If a bit in mask is set to 0, then the corresponding bit in | |
307 | value is known to be constant. */ | |
308 | widest_int m_value, m_mask; | |
309 | ||
155c9907 | 310 | bool meet_with_1 (widest_int, widest_int, unsigned); |
209ca542 | 311 | void get_value_and_mask (tree, widest_int *, widest_int *); |
155c9907 | 312 | }; |
209ca542 | 313 | |
8bc5448f KV |
314 | /* Lattice of value ranges. */ |
315 | ||
316 | class ipcp_vr_lattice | |
317 | { | |
318 | public: | |
028d81b1 | 319 | value_range m_vr; |
8bc5448f KV |
320 | |
321 | inline bool bottom_p () const; | |
322 | inline bool top_p () const; | |
323 | inline bool set_to_bottom (); | |
028d81b1 | 324 | bool meet_with (const value_range *p_vr); |
8bc5448f | 325 | bool meet_with (const ipcp_vr_lattice &other); |
54994253 | 326 | void init () { gcc_assert (m_vr.undefined_p ()); } |
8bc5448f KV |
327 | void print (FILE * f); |
328 | ||
329 | private: | |
028d81b1 | 330 | bool meet_with_1 (const value_range *other_vr); |
8bc5448f KV |
331 | }; |
332 | ||
2c9561b5 MJ |
333 | /* Structure containing lattices for a parameter itself and for pieces of |
334 | aggregates that are passed in the parameter or by a reference in a parameter | |
335 | plus some other useful flags. */ | |
336 | ||
c0cb5055 | 337 | class ipcp_param_lattices |
2c9561b5 | 338 | { |
c0cb5055 | 339 | public: |
2c9561b5 | 340 | /* Lattice describing the value of the parameter itself. */ |
c0cb5055 | 341 | ipcp_lattice<tree> itself; |
026c3cfd | 342 | /* Lattice describing the polymorphic contexts of a parameter. */ |
44210a96 | 343 | ipcp_lattice<ipa_polymorphic_call_context> ctxlat; |
2c9561b5 | 344 | /* Lattices describing aggregate parts. */ |
c0cb5055 | 345 | ipcp_agg_lattice *aggs; |
209ca542 PK |
346 | /* Lattice describing known bits. */ |
347 | ipcp_bits_lattice bits_lattice; | |
8bc5448f KV |
348 | /* Lattice describing value range. */ |
349 | ipcp_vr_lattice m_value_range; | |
2c9561b5 MJ |
350 | /* Number of aggregate lattices */ |
351 | int aggs_count; | |
352 | /* True if aggregate data were passed by reference (as opposed to by | |
353 | value). */ | |
354 | bool aggs_by_ref; | |
355 | /* All aggregate lattices contain a variable component (in addition to | |
356 | values). */ | |
357 | bool aggs_contain_variable; | |
358 | /* The value of all aggregate lattices is bottom (i.e. variable and unusable | |
359 | for any propagation). */ | |
360 | bool aggs_bottom; | |
361 | ||
310bc633 MJ |
362 | /* There is a virtual call based on this parameter. */ |
363 | bool virt_call; | |
364 | }; | |
518dc859 | 365 | |
2c9561b5 MJ |
366 | /* Allocation pools for values and their sources in ipa-cp. */ |
367 | ||
fb0b2914 | 368 | object_allocator<ipcp_value<tree> > ipcp_cst_values_pool |
fcb87c50 | 369 | ("IPA-CP constant values"); |
2651e637 | 370 | |
fb0b2914 | 371 | object_allocator<ipcp_value<ipa_polymorphic_call_context> > |
fcb87c50 | 372 | ipcp_poly_ctx_values_pool ("IPA-CP polymorphic contexts"); |
2651e637 | 373 | |
fb0b2914 | 374 | object_allocator<ipcp_value_source<tree> > ipcp_sources_pool |
fcb87c50 | 375 | ("IPA-CP value sources"); |
2651e637 | 376 | |
fb0b2914 | 377 | object_allocator<ipcp_agg_lattice> ipcp_agg_lattice_pool |
fcb87c50 | 378 | ("IPA_CP aggregate lattices"); |
2c9561b5 | 379 | |
310bc633 MJ |
380 | /* Maximal count found in program. */ |
381 | ||
3995f3a2 | 382 | static profile_count max_count; |
310bc633 MJ |
383 | |
384 | /* Original overall size of the program. */ | |
385 | ||
f7725a48 | 386 | static long overall_size, orig_overall_size; |
310bc633 | 387 | |
9e0b0ec3 MP |
388 | /* Node name to unique clone suffix number map. */ |
389 | static hash_map<const char *, unsigned> *clone_num_suffixes; | |
53aedcce | 390 | |
2c9561b5 MJ |
391 | /* Return the param lattices structure corresponding to the Ith formal |
392 | parameter of the function described by INFO. */ | |
99b1c316 MS |
393 | static inline class ipcp_param_lattices * |
394 | ipa_get_parm_lattices (class ipa_node_params *info, int i) | |
518dc859 | 395 | { |
d7da5cc8 | 396 | gcc_assert (i >= 0 && i < ipa_get_param_count (info)); |
310bc633 MJ |
397 | gcc_checking_assert (!info->ipcp_orig_node); |
398 | gcc_checking_assert (info->lattices); | |
399 | return &(info->lattices[i]); | |
518dc859 RL |
400 | } |
401 | ||
2c9561b5 MJ |
402 | /* Return the lattice corresponding to the scalar value of the Ith formal |
403 | parameter of the function described by INFO. */ | |
c0cb5055 | 404 | static inline ipcp_lattice<tree> * |
99b1c316 | 405 | ipa_get_scalar_lat (class ipa_node_params *info, int i) |
2c9561b5 | 406 | { |
99b1c316 | 407 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
2c9561b5 MJ |
408 | return &plats->itself; |
409 | } | |
410 | ||
44210a96 MJ |
411 | /* Return the lattice corresponding to the scalar value of the Ith formal |
412 | parameter of the function described by INFO. */ | |
413 | static inline ipcp_lattice<ipa_polymorphic_call_context> * | |
99b1c316 | 414 | ipa_get_poly_ctx_lat (class ipa_node_params *info, int i) |
44210a96 | 415 | { |
99b1c316 | 416 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
44210a96 MJ |
417 | return &plats->ctxlat; |
418 | } | |
419 | ||
310bc633 MJ |
420 | /* Return whether LAT is a lattice with a single constant and without an |
421 | undefined value. */ | |
422 | ||
c0cb5055 MJ |
423 | template <typename valtype> |
424 | inline bool | |
425 | ipcp_lattice<valtype>::is_single_const () | |
518dc859 | 426 | { |
c0cb5055 | 427 | if (bottom || contains_variable || values_count != 1) |
518dc859 | 428 | return false; |
310bc633 MJ |
429 | else |
430 | return true; | |
518dc859 RL |
431 | } |
432 | ||
310bc633 MJ |
433 | /* Print V which is extracted from a value in a lattice to F. */ |
434 | ||
518dc859 | 435 | static void |
310bc633 | 436 | print_ipcp_constant_value (FILE * f, tree v) |
518dc859 | 437 | { |
3b97a5c7 | 438 | if (TREE_CODE (v) == ADDR_EXPR |
155c9907 | 439 | && TREE_CODE (TREE_OPERAND (v, 0)) == CONST_DECL) |
518dc859 | 440 | { |
310bc633 | 441 | fprintf (f, "& "); |
ef6cb4c7 | 442 | print_generic_expr (f, DECL_INITIAL (TREE_OPERAND (v, 0))); |
518dc859 | 443 | } |
310bc633 | 444 | else |
ef6cb4c7 | 445 | print_generic_expr (f, v); |
518dc859 RL |
446 | } |
447 | ||
44210a96 MJ |
448 | /* Print V which is extracted from a value in a lattice to F. */ |
449 | ||
450 | static void | |
451 | print_ipcp_constant_value (FILE * f, ipa_polymorphic_call_context v) | |
452 | { | |
453 | v.dump(f, false); | |
454 | } | |
455 | ||
2c9561b5 MJ |
456 | /* Print a lattice LAT to F. */ |
457 | ||
c0cb5055 MJ |
458 | template <typename valtype> |
459 | void | |
460 | ipcp_lattice<valtype>::print (FILE * f, bool dump_sources, bool dump_benefits) | |
2c9561b5 | 461 | { |
c0cb5055 | 462 | ipcp_value<valtype> *val; |
2c9561b5 MJ |
463 | bool prev = false; |
464 | ||
c0cb5055 | 465 | if (bottom) |
2c9561b5 MJ |
466 | { |
467 | fprintf (f, "BOTTOM\n"); | |
468 | return; | |
469 | } | |
470 | ||
c0cb5055 | 471 | if (!values_count && !contains_variable) |
2c9561b5 MJ |
472 | { |
473 | fprintf (f, "TOP\n"); | |
474 | return; | |
475 | } | |
476 | ||
c0cb5055 | 477 | if (contains_variable) |
2c9561b5 MJ |
478 | { |
479 | fprintf (f, "VARIABLE"); | |
480 | prev = true; | |
481 | if (dump_benefits) | |
482 | fprintf (f, "\n"); | |
483 | } | |
484 | ||
c0cb5055 | 485 | for (val = values; val; val = val->next) |
2c9561b5 MJ |
486 | { |
487 | if (dump_benefits && prev) | |
488 | fprintf (f, " "); | |
489 | else if (!dump_benefits && prev) | |
490 | fprintf (f, ", "); | |
491 | else | |
492 | prev = true; | |
493 | ||
494 | print_ipcp_constant_value (f, val->value); | |
495 | ||
496 | if (dump_sources) | |
497 | { | |
c0cb5055 | 498 | ipcp_value_source<valtype> *s; |
2c9561b5 MJ |
499 | |
500 | fprintf (f, " [from:"); | |
501 | for (s = val->sources; s; s = s->next) | |
e3951b03 JH |
502 | fprintf (f, " %i(%f)", s->cs->caller->order, |
503 | s->cs->sreal_frequency ().to_double ()); | |
2c9561b5 MJ |
504 | fprintf (f, "]"); |
505 | } | |
506 | ||
507 | if (dump_benefits) | |
b86aedb0 MJ |
508 | fprintf (f, " [loc_time: %g, loc_size: %i, " |
509 | "prop_time: %g, prop_size: %i]\n", | |
510 | val->local_time_benefit.to_double (), val->local_size_cost, | |
511 | val->prop_time_benefit.to_double (), val->prop_size_cost); | |
2c9561b5 MJ |
512 | } |
513 | if (!dump_benefits) | |
514 | fprintf (f, "\n"); | |
515 | } | |
516 | ||
209ca542 PK |
517 | void |
518 | ipcp_bits_lattice::print (FILE *f) | |
519 | { | |
520 | if (top_p ()) | |
521 | fprintf (f, " Bits unknown (TOP)\n"); | |
522 | else if (bottom_p ()) | |
523 | fprintf (f, " Bits unusable (BOTTOM)\n"); | |
524 | else | |
525 | { | |
526 | fprintf (f, " Bits: value = "); print_hex (get_value (), f); | |
527 | fprintf (f, ", mask = "); print_hex (get_mask (), f); | |
528 | fprintf (f, "\n"); | |
529 | } | |
530 | } | |
531 | ||
8bc5448f KV |
532 | /* Print value range lattice to F. */ |
533 | ||
534 | void | |
535 | ipcp_vr_lattice::print (FILE * f) | |
536 | { | |
c49eeac3 | 537 | dump_value_range (f, &m_vr); |
8bc5448f KV |
538 | } |
539 | ||
c43f07af | 540 | /* Print all ipcp_lattices of all functions to F. */ |
310bc633 | 541 | |
518dc859 | 542 | static void |
310bc633 | 543 | print_all_lattices (FILE * f, bool dump_sources, bool dump_benefits) |
518dc859 RL |
544 | { |
545 | struct cgraph_node *node; | |
546 | int i, count; | |
3cc1cccc | 547 | |
310bc633 MJ |
548 | fprintf (f, "\nLattices:\n"); |
549 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) | |
518dc859 | 550 | { |
99b1c316 | 551 | class ipa_node_params *info; |
0eae6bab | 552 | |
0eae6bab | 553 | info = IPA_NODE_REF (node); |
48182bd6 MJ |
554 | /* Skip unoptimized functions and constprop clones since we don't make |
555 | lattices for them. */ | |
556 | if (!info || info->ipcp_orig_node) | |
9ee46552 | 557 | continue; |
464d0118 | 558 | fprintf (f, " Node: %s:\n", node->dump_name ()); |
c43f07af | 559 | count = ipa_get_param_count (info); |
518dc859 RL |
560 | for (i = 0; i < count; i++) |
561 | { | |
2c9561b5 | 562 | struct ipcp_agg_lattice *aglat; |
99b1c316 | 563 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
ca30a539 | 564 | fprintf (f, " param [%d]: ", i); |
c0cb5055 | 565 | plats->itself.print (f, dump_sources, dump_benefits); |
44210a96 MJ |
566 | fprintf (f, " ctxs: "); |
567 | plats->ctxlat.print (f, dump_sources, dump_benefits); | |
209ca542 | 568 | plats->bits_lattice.print (f); |
8bc5448f KV |
569 | fprintf (f, " "); |
570 | plats->m_value_range.print (f); | |
571 | fprintf (f, "\n"); | |
2c9561b5 MJ |
572 | if (plats->virt_call) |
573 | fprintf (f, " virt_call flag set\n"); | |
574 | ||
575 | if (plats->aggs_bottom) | |
310bc633 | 576 | { |
2c9561b5 | 577 | fprintf (f, " AGGS BOTTOM\n"); |
310bc633 MJ |
578 | continue; |
579 | } | |
2c9561b5 MJ |
580 | if (plats->aggs_contain_variable) |
581 | fprintf (f, " AGGS VARIABLE\n"); | |
582 | for (aglat = plats->aggs; aglat; aglat = aglat->next) | |
310bc633 | 583 | { |
2c9561b5 MJ |
584 | fprintf (f, " %soffset " HOST_WIDE_INT_PRINT_DEC ": ", |
585 | plats->aggs_by_ref ? "ref " : "", aglat->offset); | |
c0cb5055 | 586 | aglat->print (f, dump_sources, dump_benefits); |
310bc633 | 587 | } |
518dc859 RL |
588 | } |
589 | } | |
590 | } | |
591 | ||
310bc633 MJ |
592 | /* Determine whether it is at all technically possible to create clones of NODE |
593 | and store this information in the ipa_node_params structure associated | |
594 | with NODE. */ | |
27dbd3ac | 595 | |
310bc633 | 596 | static void |
7e729474 | 597 | determine_versionability (struct cgraph_node *node, |
99b1c316 | 598 | class ipa_node_params *info) |
27dbd3ac | 599 | { |
310bc633 | 600 | const char *reason = NULL; |
0818c24c | 601 | |
aa229804 MJ |
602 | /* There are a number of generic reasons functions cannot be versioned. We |
603 | also cannot remove parameters if there are type attributes such as fnspec | |
604 | present. */ | |
67f3791f | 605 | if (node->alias || node->thunk) |
310bc633 | 606 | reason = "alias or thunk"; |
87f94429 | 607 | else if (!node->versionable) |
d7da5cc8 | 608 | reason = "not a tree_versionable_function"; |
d52f5295 | 609 | else if (node->get_availability () <= AVAIL_INTERPOSABLE) |
310bc633 | 610 | reason = "insufficient body availability"; |
d31d42c7 JJ |
611 | else if (!opt_for_fn (node->decl, optimize) |
612 | || !opt_for_fn (node->decl, flag_ipa_cp)) | |
613 | reason = "non-optimized function"; | |
0136f8f0 AH |
614 | else if (lookup_attribute ("omp declare simd", DECL_ATTRIBUTES (node->decl))) |
615 | { | |
616 | /* Ideally we should clone the SIMD clones themselves and create | |
617 | vector copies of them, so IPA-cp and SIMD clones can happily | |
618 | coexist, but that may not be worth the effort. */ | |
619 | reason = "function has SIMD clones"; | |
620 | } | |
58b3986e ES |
621 | else if (lookup_attribute ("target_clones", DECL_ATTRIBUTES (node->decl))) |
622 | { | |
623 | /* Ideally we should clone the target clones themselves and create | |
624 | copies of them, so IPA-cp and target clones can happily | |
625 | coexist, but that may not be worth the effort. */ | |
626 | reason = "function target_clones attribute"; | |
627 | } | |
1f26ac87 JM |
628 | /* Don't clone decls local to a comdat group; it breaks and for C++ |
629 | decloned constructors, inlining is always better anyway. */ | |
d52f5295 | 630 | else if (node->comdat_local_p ()) |
1f26ac87 | 631 | reason = "comdat-local function"; |
58928b35 ML |
632 | else if (node->calls_comdat_local) |
633 | { | |
634 | /* TODO: call is versionable if we make sure that all | |
635 | callers are inside of a comdat group. */ | |
636 | reason = "calls comdat-local function"; | |
637 | } | |
27dbd3ac | 638 | |
ea49d40b | 639 | /* Functions calling BUILT_IN_VA_ARG_PACK and BUILT_IN_VA_ARG_PACK_LEN |
5d4991da JH |
640 | work only when inlined. Cloning them may still lead to better code |
641 | because ipa-cp will not give up on cloning further. If the function is | |
642 | external this however leads to wrong code because we may end up producing | |
ea49d40b JH |
643 | offline copy of the function. */ |
644 | if (DECL_EXTERNAL (node->decl)) | |
645 | for (cgraph_edge *edge = node->callees; !reason && edge; | |
646 | edge = edge->next_callee) | |
3d78e008 | 647 | if (fndecl_built_in_p (edge->callee->decl, BUILT_IN_NORMAL)) |
ea49d40b JH |
648 | { |
649 | if (DECL_FUNCTION_CODE (edge->callee->decl) == BUILT_IN_VA_ARG_PACK) | |
650 | reason = "external function which calls va_arg_pack"; | |
651 | if (DECL_FUNCTION_CODE (edge->callee->decl) | |
652 | == BUILT_IN_VA_ARG_PACK_LEN) | |
653 | reason = "external function which calls va_arg_pack_len"; | |
654 | } | |
655 | ||
67f3791f | 656 | if (reason && dump_file && !node->alias && !node->thunk) |
464d0118 ML |
657 | fprintf (dump_file, "Function %s is not versionable, reason: %s.\n", |
658 | node->dump_name (), reason); | |
27dbd3ac | 659 | |
7e729474 | 660 | info->versionable = (reason == NULL); |
27dbd3ac RH |
661 | } |
662 | ||
310bc633 MJ |
663 | /* Return true if it is at all technically possible to create clones of a |
664 | NODE. */ | |
665 | ||
ca30a539 | 666 | static bool |
310bc633 | 667 | ipcp_versionable_function_p (struct cgraph_node *node) |
ca30a539 | 668 | { |
6cf67b62 | 669 | return IPA_NODE_REF (node) && IPA_NODE_REF (node)->versionable; |
310bc633 | 670 | } |
ca30a539 | 671 | |
310bc633 | 672 | /* Structure holding accumulated information about callers of a node. */ |
749f25d8 | 673 | |
310bc633 MJ |
674 | struct caller_statistics |
675 | { | |
3995f3a2 | 676 | profile_count count_sum; |
b86aedb0 MJ |
677 | sreal freq_sum; |
678 | int n_calls, n_hot_calls; | |
310bc633 | 679 | }; |
ca30a539 | 680 | |
310bc633 | 681 | /* Initialize fields of STAT to zeroes. */ |
530f3a1b | 682 | |
310bc633 MJ |
683 | static inline void |
684 | init_caller_stats (struct caller_statistics *stats) | |
685 | { | |
3995f3a2 | 686 | stats->count_sum = profile_count::zero (); |
310bc633 MJ |
687 | stats->n_calls = 0; |
688 | stats->n_hot_calls = 0; | |
689 | stats->freq_sum = 0; | |
690 | } | |
691 | ||
692 | /* Worker callback of cgraph_for_node_and_aliases accumulating statistics of | |
693 | non-thunk incoming edges to NODE. */ | |
694 | ||
695 | static bool | |
696 | gather_caller_stats (struct cgraph_node *node, void *data) | |
697 | { | |
698 | struct caller_statistics *stats = (struct caller_statistics *) data; | |
699 | struct cgraph_edge *cs; | |
700 | ||
701 | for (cs = node->callers; cs; cs = cs->next_caller) | |
67f3791f | 702 | if (!cs->caller->thunk) |
310bc633 | 703 | { |
1bad9c18 JH |
704 | if (cs->count.ipa ().initialized_p ()) |
705 | stats->count_sum += cs->count.ipa (); | |
b86aedb0 | 706 | stats->freq_sum += cs->sreal_frequency (); |
310bc633 | 707 | stats->n_calls++; |
3dafb85c | 708 | if (cs->maybe_hot_p ()) |
310bc633 MJ |
709 | stats->n_hot_calls ++; |
710 | } | |
711 | return false; | |
712 | ||
713 | } | |
714 | ||
715 | /* Return true if this NODE is viable candidate for cloning. */ | |
716 | ||
717 | static bool | |
718 | ipcp_cloning_candidate_p (struct cgraph_node *node) | |
719 | { | |
720 | struct caller_statistics stats; | |
721 | ||
d52f5295 | 722 | gcc_checking_assert (node->has_gimple_body_p ()); |
b8698a0f | 723 | |
2bf86c84 | 724 | if (!opt_for_fn (node->decl, flag_ipa_cp_clone)) |
ca30a539 JH |
725 | { |
726 | if (dump_file) | |
155c9907 | 727 | fprintf (dump_file, "Not considering %s for cloning; " |
310bc633 | 728 | "-fipa-cp-clone disabled.\n", |
3629ff8a | 729 | node->dump_name ()); |
ca30a539 JH |
730 | return false; |
731 | } | |
ca30a539 | 732 | |
5af56ae8 | 733 | if (node->optimize_for_size_p ()) |
ca30a539 JH |
734 | { |
735 | if (dump_file) | |
155c9907 | 736 | fprintf (dump_file, "Not considering %s for cloning; " |
310bc633 | 737 | "optimizing it for size.\n", |
3629ff8a | 738 | node->dump_name ()); |
ca30a539 JH |
739 | return false; |
740 | } | |
741 | ||
310bc633 | 742 | init_caller_stats (&stats); |
d52f5295 | 743 | node->call_for_symbol_thunks_and_aliases (gather_caller_stats, &stats, false); |
310bc633 | 744 | |
f658ad30 | 745 | if (ipa_size_summaries->get (node)->self_size < stats.n_calls) |
ca30a539 JH |
746 | { |
747 | if (dump_file) | |
155c9907 | 748 | fprintf (dump_file, "Considering %s for cloning; code might shrink.\n", |
3629ff8a | 749 | node->dump_name ()); |
310bc633 | 750 | return true; |
ca30a539 JH |
751 | } |
752 | ||
753 | /* When profile is available and function is hot, propagate into it even if | |
754 | calls seems cold; constant propagation can improve function's speed | |
61502ca8 | 755 | significantly. */ |
3995f3a2 | 756 | if (max_count > profile_count::zero ()) |
ca30a539 | 757 | { |
1bad9c18 | 758 | if (stats.count_sum > node->count.ipa ().apply_scale (90, 100)) |
ca30a539 JH |
759 | { |
760 | if (dump_file) | |
310bc633 MJ |
761 | fprintf (dump_file, "Considering %s for cloning; " |
762 | "usually called directly.\n", | |
3629ff8a | 763 | node->dump_name ()); |
ca30a539 | 764 | return true; |
155c9907 | 765 | } |
ca30a539 | 766 | } |
310bc633 | 767 | if (!stats.n_hot_calls) |
ca30a539 JH |
768 | { |
769 | if (dump_file) | |
770 | fprintf (dump_file, "Not considering %s for cloning; no hot calls.\n", | |
3629ff8a | 771 | node->dump_name ()); |
ed102b70 | 772 | return false; |
ca30a539 JH |
773 | } |
774 | if (dump_file) | |
775 | fprintf (dump_file, "Considering %s for cloning.\n", | |
3629ff8a | 776 | node->dump_name ()); |
ca30a539 JH |
777 | return true; |
778 | } | |
779 | ||
c0cb5055 MJ |
780 | template <typename valtype> |
781 | class value_topo_info | |
782 | { | |
783 | public: | |
784 | /* Head of the linked list of topologically sorted values. */ | |
785 | ipcp_value<valtype> *values_topo; | |
786 | /* Stack for creating SCCs, represented by a linked list too. */ | |
787 | ipcp_value<valtype> *stack; | |
788 | /* Counter driving the algorithm in add_val_to_toposort. */ | |
789 | int dfs_counter; | |
790 | ||
791 | value_topo_info () : values_topo (NULL), stack (NULL), dfs_counter (0) | |
792 | {} | |
793 | void add_val (ipcp_value<valtype> *cur_val); | |
794 | void propagate_effects (); | |
795 | }; | |
796 | ||
310bc633 | 797 | /* Arrays representing a topological ordering of call graph nodes and a stack |
c0cb5055 MJ |
798 | of nodes used during constant propagation and also data required to perform |
799 | topological sort of values and propagation of benefits in the determined | |
800 | order. */ | |
3949c4a7 | 801 | |
c0cb5055 | 802 | class ipa_topo_info |
3949c4a7 | 803 | { |
c0cb5055 MJ |
804 | public: |
805 | /* Array with obtained topological order of cgraph nodes. */ | |
310bc633 | 806 | struct cgraph_node **order; |
c0cb5055 MJ |
807 | /* Stack of cgraph nodes used during propagation within SCC until all values |
808 | in the SCC stabilize. */ | |
310bc633 MJ |
809 | struct cgraph_node **stack; |
810 | int nnodes, stack_top; | |
c0cb5055 MJ |
811 | |
812 | value_topo_info<tree> constants; | |
44210a96 | 813 | value_topo_info<ipa_polymorphic_call_context> contexts; |
c0cb5055 MJ |
814 | |
815 | ipa_topo_info () : order(NULL), stack(NULL), nnodes(0), stack_top(0), | |
816 | constants () | |
817 | {} | |
310bc633 MJ |
818 | }; |
819 | ||
97e59627 ML |
820 | /* Skip edges from and to nodes without ipa_cp enabled. |
821 | Ignore not available symbols. */ | |
822 | ||
823 | static bool | |
824 | ignore_edge_p (cgraph_edge *e) | |
825 | { | |
826 | enum availability avail; | |
827 | cgraph_node *ultimate_target | |
828 | = e->callee->function_or_virtual_thunk_symbol (&avail, e->caller); | |
829 | ||
830 | return (avail <= AVAIL_INTERPOSABLE | |
e72763e2 | 831 | || !opt_for_fn (ultimate_target->decl, optimize) |
97e59627 ML |
832 | || !opt_for_fn (ultimate_target->decl, flag_ipa_cp)); |
833 | } | |
834 | ||
310bc633 MJ |
835 | /* Allocate the arrays in TOPO and topologically sort the nodes into order. */ |
836 | ||
837 | static void | |
99b1c316 | 838 | build_toporder_info (class ipa_topo_info *topo) |
310bc633 | 839 | { |
3dafb85c ML |
840 | topo->order = XCNEWVEC (struct cgraph_node *, symtab->cgraph_count); |
841 | topo->stack = XCNEWVEC (struct cgraph_node *, symtab->cgraph_count); | |
842 | ||
c0cb5055 | 843 | gcc_checking_assert (topo->stack_top == 0); |
97e59627 ML |
844 | topo->nnodes = ipa_reduced_postorder (topo->order, true, |
845 | ignore_edge_p); | |
3949c4a7 MJ |
846 | } |
847 | ||
310bc633 MJ |
848 | /* Free information about strongly connected components and the arrays in |
849 | TOPO. */ | |
850 | ||
518dc859 | 851 | static void |
99b1c316 | 852 | free_toporder_info (class ipa_topo_info *topo) |
310bc633 MJ |
853 | { |
854 | ipa_free_postorder_info (); | |
855 | free (topo->order); | |
856 | free (topo->stack); | |
857 | } | |
858 | ||
859 | /* Add NODE to the stack in TOPO, unless it is already there. */ | |
860 | ||
861 | static inline void | |
99b1c316 | 862 | push_node_to_stack (class ipa_topo_info *topo, struct cgraph_node *node) |
518dc859 | 863 | { |
99b1c316 | 864 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 MJ |
865 | if (info->node_enqueued) |
866 | return; | |
867 | info->node_enqueued = 1; | |
868 | topo->stack[topo->stack_top++] = node; | |
869 | } | |
518dc859 | 870 | |
310bc633 MJ |
871 | /* Pop a node from the stack in TOPO and return it or return NULL if the stack |
872 | is empty. */ | |
ca30a539 | 873 | |
310bc633 | 874 | static struct cgraph_node * |
99b1c316 | 875 | pop_node_from_stack (class ipa_topo_info *topo) |
310bc633 MJ |
876 | { |
877 | if (topo->stack_top) | |
3949c4a7 | 878 | { |
310bc633 MJ |
879 | struct cgraph_node *node; |
880 | topo->stack_top--; | |
881 | node = topo->stack[topo->stack_top]; | |
882 | IPA_NODE_REF (node)->node_enqueued = 0; | |
883 | return node; | |
3949c4a7 | 884 | } |
310bc633 MJ |
885 | else |
886 | return NULL; | |
518dc859 RL |
887 | } |
888 | ||
310bc633 MJ |
889 | /* Set lattice LAT to bottom and return true if it previously was not set as |
890 | such. */ | |
891 | ||
c0cb5055 MJ |
892 | template <typename valtype> |
893 | inline bool | |
894 | ipcp_lattice<valtype>::set_to_bottom () | |
518dc859 | 895 | { |
c0cb5055 MJ |
896 | bool ret = !bottom; |
897 | bottom = true; | |
310bc633 MJ |
898 | return ret; |
899 | } | |
518dc859 | 900 | |
310bc633 MJ |
901 | /* Mark lattice as containing an unknown value and return true if it previously |
902 | was not marked as such. */ | |
129a37fc | 903 | |
c0cb5055 MJ |
904 | template <typename valtype> |
905 | inline bool | |
906 | ipcp_lattice<valtype>::set_contains_variable () | |
310bc633 | 907 | { |
c0cb5055 MJ |
908 | bool ret = !contains_variable; |
909 | contains_variable = true; | |
310bc633 | 910 | return ret; |
518dc859 RL |
911 | } |
912 | ||
f25ae20e | 913 | /* Set all aggregate lattices in PLATS to bottom and return true if they were |
2c9561b5 MJ |
914 | not previously set as such. */ |
915 | ||
916 | static inline bool | |
99b1c316 | 917 | set_agg_lats_to_bottom (class ipcp_param_lattices *plats) |
2c9561b5 MJ |
918 | { |
919 | bool ret = !plats->aggs_bottom; | |
920 | plats->aggs_bottom = true; | |
921 | return ret; | |
922 | } | |
923 | ||
f25ae20e | 924 | /* Mark all aggregate lattices in PLATS as containing an unknown value and |
2c9561b5 MJ |
925 | return true if they were not previously marked as such. */ |
926 | ||
927 | static inline bool | |
99b1c316 | 928 | set_agg_lats_contain_variable (class ipcp_param_lattices *plats) |
2c9561b5 MJ |
929 | { |
930 | bool ret = !plats->aggs_contain_variable; | |
931 | plats->aggs_contain_variable = true; | |
932 | return ret; | |
933 | } | |
934 | ||
8bc5448f KV |
935 | bool |
936 | ipcp_vr_lattice::meet_with (const ipcp_vr_lattice &other) | |
937 | { | |
938 | return meet_with_1 (&other.m_vr); | |
939 | } | |
940 | ||
f25ae20e | 941 | /* Meet the current value of the lattice with value range described by VR |
8bc5448f KV |
942 | lattice. */ |
943 | ||
944 | bool | |
028d81b1 | 945 | ipcp_vr_lattice::meet_with (const value_range *p_vr) |
8bc5448f KV |
946 | { |
947 | return meet_with_1 (p_vr); | |
948 | } | |
949 | ||
54994253 AH |
950 | /* Meet the current value of the lattice with value range described by |
951 | OTHER_VR lattice. Return TRUE if anything changed. */ | |
8bc5448f KV |
952 | |
953 | bool | |
028d81b1 | 954 | ipcp_vr_lattice::meet_with_1 (const value_range *other_vr) |
8bc5448f | 955 | { |
8bc5448f KV |
956 | if (bottom_p ()) |
957 | return false; | |
958 | ||
54994253 | 959 | if (other_vr->varying_p ()) |
8bc5448f KV |
960 | return set_to_bottom (); |
961 | ||
028d81b1 | 962 | value_range save (m_vr); |
54994253 | 963 | m_vr.union_ (other_vr); |
ff361cc6 | 964 | return !m_vr.equal_p (save); |
8bc5448f KV |
965 | } |
966 | ||
967 | /* Return true if value range information in the lattice is yet unknown. */ | |
968 | ||
969 | bool | |
970 | ipcp_vr_lattice::top_p () const | |
971 | { | |
54994253 | 972 | return m_vr.undefined_p (); |
8bc5448f KV |
973 | } |
974 | ||
975 | /* Return true if value range information in the lattice is known to be | |
976 | unusable. */ | |
977 | ||
978 | bool | |
979 | ipcp_vr_lattice::bottom_p () const | |
980 | { | |
54994253 | 981 | return m_vr.varying_p (); |
8bc5448f KV |
982 | } |
983 | ||
984 | /* Set value range information in the lattice to bottom. Return true if it | |
985 | previously was in a different state. */ | |
986 | ||
987 | bool | |
988 | ipcp_vr_lattice::set_to_bottom () | |
989 | { | |
54994253 | 990 | if (m_vr.varying_p ()) |
8bc5448f | 991 | return false; |
97ecc8d5 AH |
992 | /* ?? We create all sorts of VARYING ranges for floats, structures, |
993 | and other types which we cannot handle as ranges. We should | |
994 | probably avoid handling them throughout the pass, but it's easier | |
995 | to create a sensible VARYING here and let the lattice | |
996 | propagate. */ | |
997 | m_vr.set_varying (integer_type_node); | |
8bc5448f KV |
998 | return true; |
999 | } | |
1000 | ||
209ca542 PK |
1001 | /* Set lattice value to bottom, if it already isn't the case. */ |
1002 | ||
1003 | bool | |
1004 | ipcp_bits_lattice::set_to_bottom () | |
1005 | { | |
1006 | if (bottom_p ()) | |
1007 | return false; | |
1008 | m_lattice_val = IPA_BITS_VARYING; | |
1009 | m_value = 0; | |
1010 | m_mask = -1; | |
1011 | return true; | |
1012 | } | |
1013 | ||
1014 | /* Set to constant if it isn't already. Only meant to be called | |
1015 | when switching state from TOP. */ | |
1016 | ||
1017 | bool | |
1018 | ipcp_bits_lattice::set_to_constant (widest_int value, widest_int mask) | |
1019 | { | |
1020 | gcc_assert (top_p ()); | |
1021 | m_lattice_val = IPA_BITS_CONSTANT; | |
d58f078c | 1022 | m_value = wi::bit_and (wi::bit_not (mask), value); |
209ca542 PK |
1023 | m_mask = mask; |
1024 | return true; | |
1025 | } | |
1026 | ||
1027 | /* Convert operand to value, mask form. */ | |
1028 | ||
1029 | void | |
1030 | ipcp_bits_lattice::get_value_and_mask (tree operand, widest_int *valuep, widest_int *maskp) | |
1031 | { | |
1032 | wide_int get_nonzero_bits (const_tree); | |
1033 | ||
1034 | if (TREE_CODE (operand) == INTEGER_CST) | |
1035 | { | |
155c9907 | 1036 | *valuep = wi::to_widest (operand); |
209ca542 PK |
1037 | *maskp = 0; |
1038 | } | |
1039 | else | |
1040 | { | |
1041 | *valuep = 0; | |
1042 | *maskp = -1; | |
1043 | } | |
1044 | } | |
1045 | ||
1046 | /* Meet operation, similar to ccp_lattice_meet, we xor values | |
1047 | if this->value, value have different values at same bit positions, we want | |
1048 | to drop that bit to varying. Return true if mask is changed. | |
1049 | This function assumes that the lattice value is in CONSTANT state */ | |
1050 | ||
1051 | bool | |
1052 | ipcp_bits_lattice::meet_with_1 (widest_int value, widest_int mask, | |
1053 | unsigned precision) | |
1054 | { | |
1055 | gcc_assert (constant_p ()); | |
155c9907 JJ |
1056 | |
1057 | widest_int old_mask = m_mask; | |
209ca542 | 1058 | m_mask = (m_mask | mask) | (m_value ^ value); |
f9177021 | 1059 | m_value &= ~m_mask; |
209ca542 PK |
1060 | |
1061 | if (wi::sext (m_mask, precision) == -1) | |
1062 | return set_to_bottom (); | |
1063 | ||
1064 | return m_mask != old_mask; | |
1065 | } | |
1066 | ||
1067 | /* Meet the bits lattice with operand | |
1068 | described by <value, mask, sgn, precision. */ | |
1069 | ||
1070 | bool | |
1071 | ipcp_bits_lattice::meet_with (widest_int value, widest_int mask, | |
1072 | unsigned precision) | |
1073 | { | |
1074 | if (bottom_p ()) | |
1075 | return false; | |
1076 | ||
1077 | if (top_p ()) | |
1078 | { | |
1079 | if (wi::sext (mask, precision) == -1) | |
1080 | return set_to_bottom (); | |
155c9907 | 1081 | return set_to_constant (value, mask); |
209ca542 PK |
1082 | } |
1083 | ||
1084 | return meet_with_1 (value, mask, precision); | |
1085 | } | |
1086 | ||
1087 | /* Meet bits lattice with the result of bit_value_binop (other, operand) | |
1088 | if code is binary operation or bit_value_unop (other) if code is unary op. | |
1089 | In the case when code is nop_expr, no adjustment is required. */ | |
1090 | ||
1091 | bool | |
1092 | ipcp_bits_lattice::meet_with (ipcp_bits_lattice& other, unsigned precision, | |
1093 | signop sgn, enum tree_code code, tree operand) | |
1094 | { | |
1095 | if (other.bottom_p ()) | |
1096 | return set_to_bottom (); | |
1097 | ||
1098 | if (bottom_p () || other.top_p ()) | |
1099 | return false; | |
1100 | ||
1101 | widest_int adjusted_value, adjusted_mask; | |
1102 | ||
1103 | if (TREE_CODE_CLASS (code) == tcc_binary) | |
1104 | { | |
1105 | tree type = TREE_TYPE (operand); | |
209ca542 PK |
1106 | widest_int o_value, o_mask; |
1107 | get_value_and_mask (operand, &o_value, &o_mask); | |
1108 | ||
1109 | bit_value_binop (code, sgn, precision, &adjusted_value, &adjusted_mask, | |
1110 | sgn, precision, other.get_value (), other.get_mask (), | |
1111 | TYPE_SIGN (type), TYPE_PRECISION (type), o_value, o_mask); | |
1112 | ||
1113 | if (wi::sext (adjusted_mask, precision) == -1) | |
1114 | return set_to_bottom (); | |
1115 | } | |
1116 | ||
1117 | else if (TREE_CODE_CLASS (code) == tcc_unary) | |
1118 | { | |
1119 | bit_value_unop (code, sgn, precision, &adjusted_value, | |
1120 | &adjusted_mask, sgn, precision, other.get_value (), | |
1121 | other.get_mask ()); | |
1122 | ||
1123 | if (wi::sext (adjusted_mask, precision) == -1) | |
1124 | return set_to_bottom (); | |
1125 | } | |
1126 | ||
209ca542 PK |
1127 | else |
1128 | return set_to_bottom (); | |
1129 | ||
1130 | if (top_p ()) | |
1131 | { | |
1132 | if (wi::sext (adjusted_mask, precision) == -1) | |
1133 | return set_to_bottom (); | |
155c9907 | 1134 | return set_to_constant (adjusted_value, adjusted_mask); |
209ca542 PK |
1135 | } |
1136 | else | |
1137 | return meet_with_1 (adjusted_value, adjusted_mask, precision); | |
1138 | } | |
1139 | ||
2c9561b5 MJ |
1140 | /* Mark bot aggregate and scalar lattices as containing an unknown variable, |
1141 | return true is any of them has not been marked as such so far. */ | |
1142 | ||
1143 | static inline bool | |
99b1c316 | 1144 | set_all_contains_variable (class ipcp_param_lattices *plats) |
2c9561b5 | 1145 | { |
44210a96 MJ |
1146 | bool ret; |
1147 | ret = plats->itself.set_contains_variable (); | |
1148 | ret |= plats->ctxlat.set_contains_variable (); | |
1149 | ret |= set_agg_lats_contain_variable (plats); | |
209ca542 | 1150 | ret |= plats->bits_lattice.set_to_bottom (); |
8bc5448f | 1151 | ret |= plats->m_value_range.set_to_bottom (); |
2c9561b5 MJ |
1152 | return ret; |
1153 | } | |
1154 | ||
af21714c MJ |
1155 | /* Worker of call_for_symbol_thunks_and_aliases, increment the integer DATA |
1156 | points to by the number of callers to NODE. */ | |
1157 | ||
1158 | static bool | |
1159 | count_callers (cgraph_node *node, void *data) | |
1160 | { | |
1161 | int *caller_count = (int *) data; | |
1162 | ||
1163 | for (cgraph_edge *cs = node->callers; cs; cs = cs->next_caller) | |
67914693 | 1164 | /* Local thunks can be handled transparently, but if the thunk cannot |
af21714c | 1165 | be optimized out, count it as a real use. */ |
67f3791f | 1166 | if (!cs->caller->thunk || !cs->caller->local) |
af21714c MJ |
1167 | ++*caller_count; |
1168 | return false; | |
1169 | } | |
1170 | ||
1171 | /* Worker of call_for_symbol_thunks_and_aliases, it is supposed to be called on | |
1172 | the one caller of some other node. Set the caller's corresponding flag. */ | |
1173 | ||
1174 | static bool | |
1175 | set_single_call_flag (cgraph_node *node, void *) | |
1176 | { | |
1177 | cgraph_edge *cs = node->callers; | |
1178 | /* Local thunks can be handled transparently, skip them. */ | |
67f3791f | 1179 | while (cs && cs->caller->thunk && cs->caller->local) |
af21714c | 1180 | cs = cs->next_caller; |
68188fff | 1181 | if (cs && IPA_NODE_REF (cs->caller)) |
af21714c | 1182 | { |
af21714c MJ |
1183 | IPA_NODE_REF (cs->caller)->node_calling_single_call = true; |
1184 | return true; | |
1185 | } | |
1186 | return false; | |
1187 | } | |
1188 | ||
310bc633 | 1189 | /* Initialize ipcp_lattices. */ |
43558bcc | 1190 | |
518dc859 | 1191 | static void |
310bc633 | 1192 | initialize_node_lattices (struct cgraph_node *node) |
518dc859 | 1193 | { |
99b1c316 | 1194 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 MJ |
1195 | struct cgraph_edge *ie; |
1196 | bool disable = false, variable = false; | |
1197 | int i; | |
518dc859 | 1198 | |
d52f5295 | 1199 | gcc_checking_assert (node->has_gimple_body_p ()); |
ff6686d2 MJ |
1200 | |
1201 | if (!ipa_get_param_count (info)) | |
1202 | disable = true; | |
87f94429 | 1203 | else if (node->local) |
af21714c MJ |
1204 | { |
1205 | int caller_count = 0; | |
1206 | node->call_for_symbol_thunks_and_aliases (count_callers, &caller_count, | |
1207 | true); | |
1208 | gcc_checking_assert (caller_count > 0); | |
1209 | if (caller_count == 1) | |
1210 | node->call_for_symbol_thunks_and_aliases (set_single_call_flag, | |
1211 | NULL, true); | |
1212 | } | |
1213 | else | |
310bc633 MJ |
1214 | { |
1215 | /* When cloning is allowed, we can assume that externally visible | |
1216 | functions are not called. We will compensate this by cloning | |
1217 | later. */ | |
1218 | if (ipcp_versionable_function_p (node) | |
1219 | && ipcp_cloning_candidate_p (node)) | |
1220 | variable = true; | |
1221 | else | |
1222 | disable = true; | |
1223 | } | |
518dc859 | 1224 | |
ff6686d2 | 1225 | if (dump_file && (dump_flags & TDF_DETAILS) |
67f3791f | 1226 | && !node->alias && !node->thunk) |
8bc5448f | 1227 | { |
ff6686d2 MJ |
1228 | fprintf (dump_file, "Initializing lattices of %s\n", |
1229 | node->dump_name ()); | |
1230 | if (disable || variable) | |
1231 | fprintf (dump_file, " Marking all lattices as %s\n", | |
1232 | disable ? "BOTTOM" : "VARIABLE"); | |
8bc5448f KV |
1233 | } |
1234 | ||
ff6686d2 MJ |
1235 | auto_vec<bool, 16> surviving_params; |
1236 | bool pre_modified = false; | |
ae7a23a3 JH |
1237 | |
1238 | clone_info *cinfo = clone_info::get (node); | |
1239 | ||
1240 | if (!disable && cinfo && cinfo->param_adjustments) | |
310bc633 | 1241 | { |
ff6686d2 MJ |
1242 | /* At the moment all IPA optimizations should use the number of |
1243 | parameters of the prevailing decl as the m_always_copy_start. | |
1244 | Handling any other value would complicate the code below, so for the | |
1245 | time bing let's only assert it is so. */ | |
ae7a23a3 | 1246 | gcc_assert ((cinfo->param_adjustments->m_always_copy_start |
ff6686d2 | 1247 | == ipa_get_param_count (info)) |
ae7a23a3 | 1248 | || cinfo->param_adjustments->m_always_copy_start < 0); |
ff6686d2 MJ |
1249 | |
1250 | pre_modified = true; | |
ae7a23a3 | 1251 | cinfo->param_adjustments->get_surviving_params (&surviving_params); |
ff6686d2 MJ |
1252 | |
1253 | if (dump_file && (dump_flags & TDF_DETAILS) | |
67f3791f | 1254 | && !node->alias && !node->thunk) |
310bc633 | 1255 | { |
ff6686d2 MJ |
1256 | bool first = true; |
1257 | for (int j = 0; j < ipa_get_param_count (info); j++) | |
2c9561b5 | 1258 | { |
ff6686d2 MJ |
1259 | if (j < (int) surviving_params.length () |
1260 | && surviving_params[j]) | |
1261 | continue; | |
1262 | if (first) | |
1263 | { | |
1264 | fprintf (dump_file, | |
1265 | " The following parameters are dead on arrival:"); | |
1266 | first = false; | |
1267 | } | |
1268 | fprintf (dump_file, " %u", j); | |
2c9561b5 | 1269 | } |
ff6686d2 MJ |
1270 | if (!first) |
1271 | fprintf (dump_file, "\n"); | |
1272 | } | |
1273 | } | |
1274 | ||
1275 | for (i = 0; i < ipa_get_param_count (info); i++) | |
1276 | { | |
1277 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
1278 | if (disable | |
1279 | || (pre_modified && (surviving_params.length () <= (unsigned) i | |
1280 | || !surviving_params[i]))) | |
1281 | { | |
1282 | plats->itself.set_to_bottom (); | |
1283 | plats->ctxlat.set_to_bottom (); | |
1284 | set_agg_lats_to_bottom (plats); | |
1285 | plats->bits_lattice.set_to_bottom (); | |
4ba9fb0a | 1286 | plats->m_value_range.m_vr = value_range (); |
ff6686d2 MJ |
1287 | plats->m_value_range.set_to_bottom (); |
1288 | } | |
1289 | else | |
1290 | { | |
1291 | plats->m_value_range.init (); | |
1292 | if (variable) | |
2c9561b5 | 1293 | set_all_contains_variable (plats); |
310bc633 | 1294 | } |
310bc633 | 1295 | } |
518dc859 | 1296 | |
310bc633 | 1297 | for (ie = node->indirect_calls; ie; ie = ie->next_callee) |
1d5755ef | 1298 | if (ie->indirect_info->polymorphic |
155c9907 | 1299 | && ie->indirect_info->param_index >= 0) |
0818c24c | 1300 | { |
310bc633 | 1301 | gcc_checking_assert (ie->indirect_info->param_index >= 0); |
2c9561b5 MJ |
1302 | ipa_get_parm_lattices (info, |
1303 | ie->indirect_info->param_index)->virt_call = 1; | |
0818c24c | 1304 | } |
518dc859 RL |
1305 | } |
1306 | ||
f38a33a2 MJ |
1307 | /* Return true iff X and Y should be considered equal values by IPA-CP. */ |
1308 | ||
1309 | static bool | |
1310 | values_equal_for_ipcp_p (tree x, tree y) | |
1311 | { | |
1312 | gcc_checking_assert (x != NULL_TREE && y != NULL_TREE); | |
1313 | ||
1314 | if (x == y) | |
1315 | return true; | |
1316 | ||
1317 | if (TREE_CODE (x) == ADDR_EXPR | |
1318 | && TREE_CODE (y) == ADDR_EXPR | |
1319 | && TREE_CODE (TREE_OPERAND (x, 0)) == CONST_DECL | |
1320 | && TREE_CODE (TREE_OPERAND (y, 0)) == CONST_DECL) | |
1321 | return operand_equal_p (DECL_INITIAL (TREE_OPERAND (x, 0)), | |
1322 | DECL_INITIAL (TREE_OPERAND (y, 0)), 0); | |
1323 | else | |
1324 | return operand_equal_p (x, y, 0); | |
1325 | } | |
1326 | ||
eb270950 FX |
1327 | /* Return the result of a (possibly arithmetic) operation on the constant |
1328 | value INPUT. OPERAND is 2nd operand for binary operation. RES_TYPE is | |
1329 | the type of the parameter to which the result is passed. Return | |
1330 | NULL_TREE if that cannot be determined or be considered an | |
1331 | interprocedural invariant. */ | |
3949c4a7 | 1332 | |
310bc633 | 1333 | static tree |
eb270950 FX |
1334 | ipa_get_jf_arith_result (enum tree_code opcode, tree input, tree operand, |
1335 | tree res_type) | |
3949c4a7 | 1336 | { |
e5cf5e11 | 1337 | tree res; |
3949c4a7 | 1338 | |
eb270950 | 1339 | if (opcode == NOP_EXPR) |
310bc633 | 1340 | return input; |
04643334 MJ |
1341 | if (!is_gimple_ip_invariant (input)) |
1342 | return NULL_TREE; | |
3949c4a7 | 1343 | |
f38a33a2 MJ |
1344 | if (opcode == ASSERT_EXPR) |
1345 | { | |
1346 | if (values_equal_for_ipcp_p (input, operand)) | |
1347 | return input; | |
1348 | else | |
1349 | return NULL_TREE; | |
1350 | } | |
1351 | ||
e5cf5e11 | 1352 | if (!res_type) |
a2b4c188 | 1353 | { |
e5cf5e11 PK |
1354 | if (TREE_CODE_CLASS (opcode) == tcc_comparison) |
1355 | res_type = boolean_type_node; | |
1356 | else if (expr_type_first_operand_type_p (opcode)) | |
1357 | res_type = TREE_TYPE (input); | |
a2b4c188 | 1358 | else |
e5cf5e11 | 1359 | return NULL_TREE; |
a2b4c188 | 1360 | } |
e5cf5e11 PK |
1361 | |
1362 | if (TREE_CODE_CLASS (opcode) == tcc_unary) | |
1363 | res = fold_unary (opcode, res_type, input); | |
1364 | else | |
eb270950 | 1365 | res = fold_binary (opcode, res_type, input, operand); |
e5cf5e11 | 1366 | |
310bc633 MJ |
1367 | if (res && !is_gimple_ip_invariant (res)) |
1368 | return NULL_TREE; | |
3949c4a7 | 1369 | |
310bc633 | 1370 | return res; |
3949c4a7 MJ |
1371 | } |
1372 | ||
eb270950 FX |
1373 | /* Return the result of a (possibly arithmetic) pass through jump function |
1374 | JFUNC on the constant value INPUT. RES_TYPE is the type of the parameter | |
1375 | to which the result is passed. Return NULL_TREE if that cannot be | |
1376 | determined or be considered an interprocedural invariant. */ | |
1377 | ||
1378 | static tree | |
1379 | ipa_get_jf_pass_through_result (struct ipa_jump_func *jfunc, tree input, | |
1380 | tree res_type) | |
1381 | { | |
1382 | return ipa_get_jf_arith_result (ipa_get_jf_pass_through_operation (jfunc), | |
1383 | input, | |
1384 | ipa_get_jf_pass_through_operand (jfunc), | |
1385 | res_type); | |
1386 | } | |
1387 | ||
310bc633 MJ |
1388 | /* Return the result of an ancestor jump function JFUNC on the constant value |
1389 | INPUT. Return NULL_TREE if that cannot be determined. */ | |
3949c4a7 | 1390 | |
310bc633 MJ |
1391 | static tree |
1392 | ipa_get_jf_ancestor_result (struct ipa_jump_func *jfunc, tree input) | |
3949c4a7 | 1393 | { |
44210a96 MJ |
1394 | gcc_checking_assert (TREE_CODE (input) != TREE_BINFO); |
1395 | if (TREE_CODE (input) == ADDR_EXPR) | |
3949c4a7 | 1396 | { |
f3280e4c RB |
1397 | gcc_checking_assert (is_gimple_ip_invariant_address (input)); |
1398 | poly_int64 off = ipa_get_jf_ancestor_offset (jfunc); | |
1399 | if (known_eq (off, 0)) | |
1400 | return input; | |
7d4549b2 | 1401 | poly_int64 byte_offset = exact_div (off, BITS_PER_UNIT); |
f3280e4c | 1402 | return build1 (ADDR_EXPR, TREE_TYPE (input), |
7d4549b2 ML |
1403 | fold_build2 (MEM_REF, TREE_TYPE (TREE_TYPE (input)), input, |
1404 | build_int_cst (ptr_type_node, byte_offset))); | |
3949c4a7 MJ |
1405 | } |
1406 | else | |
310bc633 MJ |
1407 | return NULL_TREE; |
1408 | } | |
3949c4a7 | 1409 | |
44210a96 MJ |
1410 | /* Determine whether JFUNC evaluates to a single known constant value and if |
1411 | so, return it. Otherwise return NULL. INFO describes the caller node or | |
1412 | the one it is inlined to, so that pass-through jump functions can be | |
e5cf5e11 PK |
1413 | evaluated. PARM_TYPE is the type of the parameter to which the result is |
1414 | passed. */ | |
310bc633 | 1415 | |
d2d668fb | 1416 | tree |
99b1c316 | 1417 | ipa_value_from_jfunc (class ipa_node_params *info, struct ipa_jump_func *jfunc, |
e5cf5e11 | 1418 | tree parm_type) |
310bc633 MJ |
1419 | { |
1420 | if (jfunc->type == IPA_JF_CONST) | |
7b872d9e | 1421 | return ipa_get_jf_constant (jfunc); |
310bc633 MJ |
1422 | else if (jfunc->type == IPA_JF_PASS_THROUGH |
1423 | || jfunc->type == IPA_JF_ANCESTOR) | |
3949c4a7 | 1424 | { |
310bc633 MJ |
1425 | tree input; |
1426 | int idx; | |
3949c4a7 | 1427 | |
310bc633 | 1428 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
7b872d9e | 1429 | idx = ipa_get_jf_pass_through_formal_id (jfunc); |
310bc633 | 1430 | else |
7b872d9e | 1431 | idx = ipa_get_jf_ancestor_formal_id (jfunc); |
3949c4a7 | 1432 | |
310bc633 | 1433 | if (info->ipcp_orig_node) |
44210a96 | 1434 | input = info->known_csts[idx]; |
310bc633 | 1435 | else |
3949c4a7 | 1436 | { |
c0cb5055 | 1437 | ipcp_lattice<tree> *lat; |
310bc633 | 1438 | |
370a7814 JH |
1439 | if (!info->lattices |
1440 | || idx >= ipa_get_param_count (info)) | |
2bf86c84 | 1441 | return NULL_TREE; |
2c9561b5 | 1442 | lat = ipa_get_scalar_lat (info, idx); |
c0cb5055 | 1443 | if (!lat->is_single_const ()) |
310bc633 MJ |
1444 | return NULL_TREE; |
1445 | input = lat->values->value; | |
1446 | } | |
1447 | ||
1448 | if (!input) | |
1449 | return NULL_TREE; | |
1450 | ||
1451 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
e5cf5e11 | 1452 | return ipa_get_jf_pass_through_result (jfunc, input, parm_type); |
310bc633 | 1453 | else |
7b872d9e | 1454 | return ipa_get_jf_ancestor_result (jfunc, input); |
3949c4a7 | 1455 | } |
310bc633 MJ |
1456 | else |
1457 | return NULL_TREE; | |
3949c4a7 MJ |
1458 | } |
1459 | ||
f25ae20e | 1460 | /* Determine whether JFUNC evaluates to single known polymorphic context, given |
44210a96 MJ |
1461 | that INFO describes the caller node or the one it is inlined to, CS is the |
1462 | call graph edge corresponding to JFUNC and CSIDX index of the described | |
1463 | parameter. */ | |
1464 | ||
1465 | ipa_polymorphic_call_context | |
1466 | ipa_context_from_jfunc (ipa_node_params *info, cgraph_edge *cs, int csidx, | |
1467 | ipa_jump_func *jfunc) | |
1468 | { | |
1469 | ipa_edge_args *args = IPA_EDGE_REF (cs); | |
1470 | ipa_polymorphic_call_context ctx; | |
1471 | ipa_polymorphic_call_context *edge_ctx | |
1472 | = cs ? ipa_get_ith_polymorhic_call_context (args, csidx) : NULL; | |
1473 | ||
1474 | if (edge_ctx && !edge_ctx->useless_p ()) | |
1475 | ctx = *edge_ctx; | |
1476 | ||
1477 | if (jfunc->type == IPA_JF_PASS_THROUGH | |
1478 | || jfunc->type == IPA_JF_ANCESTOR) | |
1479 | { | |
1480 | ipa_polymorphic_call_context srcctx; | |
1481 | int srcidx; | |
df0d8136 | 1482 | bool type_preserved = true; |
44210a96 MJ |
1483 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
1484 | { | |
df0d8136 | 1485 | if (ipa_get_jf_pass_through_operation (jfunc) != NOP_EXPR) |
44210a96 | 1486 | return ctx; |
df0d8136 | 1487 | type_preserved = ipa_get_jf_pass_through_type_preserved (jfunc); |
44210a96 MJ |
1488 | srcidx = ipa_get_jf_pass_through_formal_id (jfunc); |
1489 | } | |
1490 | else | |
1491 | { | |
df0d8136 | 1492 | type_preserved = ipa_get_jf_ancestor_type_preserved (jfunc); |
44210a96 MJ |
1493 | srcidx = ipa_get_jf_ancestor_formal_id (jfunc); |
1494 | } | |
1495 | if (info->ipcp_orig_node) | |
1496 | { | |
1497 | if (info->known_contexts.exists ()) | |
1498 | srcctx = info->known_contexts[srcidx]; | |
1499 | } | |
1500 | else | |
1501 | { | |
370a7814 JH |
1502 | if (!info->lattices |
1503 | || srcidx >= ipa_get_param_count (info)) | |
2bf86c84 | 1504 | return ctx; |
44210a96 MJ |
1505 | ipcp_lattice<ipa_polymorphic_call_context> *lat; |
1506 | lat = ipa_get_poly_ctx_lat (info, srcidx); | |
1507 | if (!lat->is_single_const ()) | |
1508 | return ctx; | |
1509 | srcctx = lat->values->value; | |
1510 | } | |
1511 | if (srcctx.useless_p ()) | |
1512 | return ctx; | |
1513 | if (jfunc->type == IPA_JF_ANCESTOR) | |
1514 | srcctx.offset_by (ipa_get_jf_ancestor_offset (jfunc)); | |
df0d8136 JH |
1515 | if (!type_preserved) |
1516 | srcctx.possible_dynamic_type_change (cs->in_polymorphic_cdtor); | |
1517 | srcctx.combine_with (ctx); | |
1518 | return srcctx; | |
44210a96 MJ |
1519 | } |
1520 | ||
1521 | return ctx; | |
1522 | } | |
3949c4a7 | 1523 | |
68718e8e JH |
1524 | /* Emulate effects of unary OPERATION and/or conversion from SRC_TYPE to |
1525 | DST_TYPE on value range in SRC_VR and store it to DST_VR. Return true if | |
1526 | the result is a range or an anti-range. */ | |
1527 | ||
1528 | static bool | |
1529 | ipa_vr_operation_and_type_effects (value_range *dst_vr, | |
1530 | value_range *src_vr, | |
1531 | enum tree_code operation, | |
1532 | tree dst_type, tree src_type) | |
1533 | { | |
1534 | range_fold_unary_expr (dst_vr, operation, dst_type, src_vr, src_type); | |
1535 | if (dst_vr->varying_p () || dst_vr->undefined_p ()) | |
1536 | return false; | |
1537 | return true; | |
1538 | } | |
1539 | ||
1540 | /* Determine value_range of JFUNC given that INFO describes the caller node or | |
1541 | the one it is inlined to, CS is the call graph edge corresponding to JFUNC | |
1542 | and PARM_TYPE of the parameter. */ | |
1543 | ||
1544 | value_range | |
1545 | ipa_value_range_from_jfunc (ipa_node_params *info, cgraph_edge *cs, | |
1546 | ipa_jump_func *jfunc, tree parm_type) | |
1547 | { | |
1548 | value_range vr; | |
1549 | return vr; | |
1550 | if (jfunc->m_vr) | |
1551 | ipa_vr_operation_and_type_effects (&vr, | |
1552 | jfunc->m_vr, | |
1553 | NOP_EXPR, parm_type, | |
1554 | jfunc->m_vr->type ()); | |
1555 | if (vr.singleton_p ()) | |
1556 | return vr; | |
1557 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
1558 | { | |
1559 | int idx; | |
1560 | ipcp_transformation *sum | |
1561 | = ipcp_get_transformation_summary (cs->caller->inlined_to | |
1562 | ? cs->caller->inlined_to | |
1563 | : cs->caller); | |
1564 | if (!sum || !sum->m_vr) | |
1565 | return vr; | |
1566 | ||
1567 | idx = ipa_get_jf_pass_through_formal_id (jfunc); | |
1568 | ||
1569 | if (!(*sum->m_vr)[idx].known) | |
1570 | return vr; | |
1571 | tree vr_type = ipa_get_type (info, idx); | |
1572 | value_range srcvr (wide_int_to_tree (vr_type, (*sum->m_vr)[idx].min), | |
1573 | wide_int_to_tree (vr_type, (*sum->m_vr)[idx].max), | |
1574 | (*sum->m_vr)[idx].type); | |
1575 | ||
1576 | enum tree_code operation = ipa_get_jf_pass_through_operation (jfunc); | |
1577 | ||
1578 | if (TREE_CODE_CLASS (operation) == tcc_unary) | |
1579 | { | |
1580 | value_range res; | |
1581 | ||
1582 | if (ipa_vr_operation_and_type_effects (&res, | |
1583 | &srcvr, | |
1584 | operation, parm_type, | |
1585 | vr_type)) | |
1586 | vr.intersect (res); | |
1587 | } | |
1588 | else | |
1589 | { | |
1590 | value_range op_res, res; | |
1591 | tree op = ipa_get_jf_pass_through_operand (jfunc); | |
1592 | value_range op_vr (op, op); | |
1593 | ||
1594 | range_fold_binary_expr (&op_res, operation, vr_type, &srcvr, &op_vr); | |
1595 | if (ipa_vr_operation_and_type_effects (&res, | |
1596 | &op_res, | |
1597 | NOP_EXPR, parm_type, | |
1598 | vr_type)) | |
1599 | vr.intersect (res); | |
1600 | } | |
1601 | } | |
1602 | return vr; | |
1603 | } | |
1604 | ||
eb270950 FX |
1605 | /* See if NODE is a clone with a known aggregate value at a given OFFSET of a |
1606 | parameter with the given INDEX. */ | |
1607 | ||
1608 | static tree | |
1609 | get_clone_agg_value (struct cgraph_node *node, HOST_WIDE_INT offset, | |
1610 | int index) | |
1611 | { | |
1612 | struct ipa_agg_replacement_value *aggval; | |
1613 | ||
1614 | aggval = ipa_get_agg_replacements_for_node (node); | |
1615 | while (aggval) | |
1616 | { | |
1617 | if (aggval->offset == offset | |
1618 | && aggval->index == index) | |
1619 | return aggval->value; | |
1620 | aggval = aggval->next; | |
1621 | } | |
1622 | return NULL_TREE; | |
1623 | } | |
1624 | ||
1625 | /* Determine whether ITEM, jump function for an aggregate part, evaluates to a | |
1626 | single known constant value and if so, return it. Otherwise return NULL. | |
1627 | NODE and INFO describes the caller node or the one it is inlined to, and | |
1628 | its related info. */ | |
1629 | ||
1630 | static tree | |
1631 | ipa_agg_value_from_node (class ipa_node_params *info, | |
1632 | struct cgraph_node *node, | |
1633 | struct ipa_agg_jf_item *item) | |
1634 | { | |
1635 | tree value = NULL_TREE; | |
1636 | int src_idx; | |
1637 | ||
1638 | if (item->offset < 0 || item->jftype == IPA_JF_UNKNOWN) | |
1639 | return NULL_TREE; | |
1640 | ||
1641 | if (item->jftype == IPA_JF_CONST) | |
1642 | return item->value.constant; | |
1643 | ||
1644 | gcc_checking_assert (item->jftype == IPA_JF_PASS_THROUGH | |
1645 | || item->jftype == IPA_JF_LOAD_AGG); | |
1646 | ||
1647 | src_idx = item->value.pass_through.formal_id; | |
1648 | ||
1649 | if (info->ipcp_orig_node) | |
1650 | { | |
1651 | if (item->jftype == IPA_JF_PASS_THROUGH) | |
1652 | value = info->known_csts[src_idx]; | |
1653 | else | |
1654 | value = get_clone_agg_value (node, item->value.load_agg.offset, | |
1655 | src_idx); | |
1656 | } | |
1657 | else if (info->lattices) | |
1658 | { | |
1659 | class ipcp_param_lattices *src_plats | |
1660 | = ipa_get_parm_lattices (info, src_idx); | |
1661 | ||
1662 | if (item->jftype == IPA_JF_PASS_THROUGH) | |
1663 | { | |
1664 | struct ipcp_lattice<tree> *lat = &src_plats->itself; | |
1665 | ||
1666 | if (!lat->is_single_const ()) | |
1667 | return NULL_TREE; | |
1668 | ||
1669 | value = lat->values->value; | |
1670 | } | |
1671 | else if (src_plats->aggs | |
1672 | && !src_plats->aggs_bottom | |
1673 | && !src_plats->aggs_contain_variable | |
1674 | && src_plats->aggs_by_ref == item->value.load_agg.by_ref) | |
1675 | { | |
1676 | struct ipcp_agg_lattice *aglat; | |
1677 | ||
1678 | for (aglat = src_plats->aggs; aglat; aglat = aglat->next) | |
1679 | { | |
1680 | if (aglat->offset > item->value.load_agg.offset) | |
1681 | break; | |
1682 | ||
1683 | if (aglat->offset == item->value.load_agg.offset) | |
1684 | { | |
1685 | if (aglat->is_single_const ()) | |
1686 | value = aglat->values->value; | |
1687 | break; | |
1688 | } | |
1689 | } | |
1690 | } | |
1691 | } | |
1692 | ||
1693 | if (!value) | |
1694 | return NULL_TREE; | |
1695 | ||
1696 | if (item->jftype == IPA_JF_LOAD_AGG) | |
1697 | { | |
1698 | tree load_type = item->value.load_agg.type; | |
1699 | tree value_type = TREE_TYPE (value); | |
1700 | ||
1701 | /* Ensure value type is compatible with load type. */ | |
1702 | if (!useless_type_conversion_p (load_type, value_type)) | |
1703 | return NULL_TREE; | |
1704 | } | |
1705 | ||
1706 | return ipa_get_jf_arith_result (item->value.pass_through.operation, | |
1707 | value, | |
1708 | item->value.pass_through.operand, | |
1709 | item->type); | |
1710 | } | |
1711 | ||
1712 | /* Determine whether AGG_JFUNC evaluates to a set of known constant value for | |
1713 | an aggregate and if so, return it. Otherwise return an empty set. NODE | |
1714 | and INFO describes the caller node or the one it is inlined to, and its | |
1715 | related info. */ | |
1716 | ||
1717 | struct ipa_agg_value_set | |
1718 | ipa_agg_value_set_from_jfunc (class ipa_node_params *info, cgraph_node *node, | |
1719 | struct ipa_agg_jump_function *agg_jfunc) | |
1720 | { | |
1721 | struct ipa_agg_value_set agg; | |
1722 | struct ipa_agg_jf_item *item; | |
1723 | int i; | |
1724 | ||
1725 | agg.items = vNULL; | |
1726 | agg.by_ref = agg_jfunc->by_ref; | |
1727 | ||
1728 | FOR_EACH_VEC_SAFE_ELT (agg_jfunc->items, i, item) | |
1729 | { | |
1730 | tree value = ipa_agg_value_from_node (info, node, item); | |
1731 | ||
1732 | if (value) | |
1733 | { | |
1734 | struct ipa_agg_value value_item; | |
1735 | ||
1736 | value_item.offset = item->offset; | |
1737 | value_item.value = value; | |
1738 | ||
1739 | agg.items.safe_push (value_item); | |
1740 | } | |
1741 | } | |
1742 | return agg; | |
1743 | } | |
1744 | ||
310bc633 MJ |
1745 | /* If checking is enabled, verify that no lattice is in the TOP state, i.e. not |
1746 | bottom, not containing a variable component and without any known value at | |
1747 | the same time. */ | |
3949c4a7 | 1748 | |
310bc633 MJ |
1749 | DEBUG_FUNCTION void |
1750 | ipcp_verify_propagated_values (void) | |
518dc859 | 1751 | { |
310bc633 | 1752 | struct cgraph_node *node; |
ca30a539 | 1753 | |
310bc633 | 1754 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) |
518dc859 | 1755 | { |
99b1c316 | 1756 | class ipa_node_params *info = IPA_NODE_REF (node); |
e72763e2 JH |
1757 | if (!opt_for_fn (node->decl, flag_ipa_cp) |
1758 | || !opt_for_fn (node->decl, optimize)) | |
6cf67b62 | 1759 | continue; |
310bc633 | 1760 | int i, count = ipa_get_param_count (info); |
c43f07af | 1761 | |
310bc633 | 1762 | for (i = 0; i < count; i++) |
518dc859 | 1763 | { |
c0cb5055 | 1764 | ipcp_lattice<tree> *lat = ipa_get_scalar_lat (info, i); |
c43f07af | 1765 | |
310bc633 MJ |
1766 | if (!lat->bottom |
1767 | && !lat->contains_variable | |
1768 | && lat->values_count == 0) | |
518dc859 | 1769 | { |
310bc633 | 1770 | if (dump_file) |
518dc859 | 1771 | { |
6c52831d | 1772 | symtab->dump (dump_file); |
310bc633 | 1773 | fprintf (dump_file, "\nIPA lattices after constant " |
5bed50e8 | 1774 | "propagation, before gcc_unreachable:\n"); |
310bc633 | 1775 | print_all_lattices (dump_file, true, false); |
518dc859 | 1776 | } |
3949c4a7 | 1777 | |
310bc633 | 1778 | gcc_unreachable (); |
518dc859 RL |
1779 | } |
1780 | } | |
1781 | } | |
1782 | } | |
1783 | ||
44210a96 MJ |
1784 | /* Return true iff X and Y should be considered equal contexts by IPA-CP. */ |
1785 | ||
1786 | static bool | |
1787 | values_equal_for_ipcp_p (ipa_polymorphic_call_context x, | |
1788 | ipa_polymorphic_call_context y) | |
1789 | { | |
1790 | return x.equal_to (y); | |
1791 | } | |
1792 | ||
1793 | ||
c0cb5055 MJ |
1794 | /* Add a new value source to the value represented by THIS, marking that a |
1795 | value comes from edge CS and (if the underlying jump function is a | |
1796 | pass-through or an ancestor one) from a caller value SRC_VAL of a caller | |
1797 | parameter described by SRC_INDEX. OFFSET is negative if the source was the | |
1798 | scalar value of the parameter itself or the offset within an aggregate. */ | |
310bc633 | 1799 | |
c0cb5055 MJ |
1800 | template <typename valtype> |
1801 | void | |
1802 | ipcp_value<valtype>::add_source (cgraph_edge *cs, ipcp_value *src_val, | |
1803 | int src_idx, HOST_WIDE_INT offset) | |
518dc859 | 1804 | { |
c0cb5055 | 1805 | ipcp_value_source<valtype> *src; |
ca30a539 | 1806 | |
2651e637 | 1807 | src = new (ipcp_sources_pool.allocate ()) ipcp_value_source<valtype>; |
2c9561b5 | 1808 | src->offset = offset; |
310bc633 MJ |
1809 | src->cs = cs; |
1810 | src->val = src_val; | |
1811 | src->index = src_idx; | |
fb3f88cc | 1812 | |
c0cb5055 MJ |
1813 | src->next = sources; |
1814 | sources = src; | |
310bc633 MJ |
1815 | } |
1816 | ||
c0cb5055 MJ |
1817 | /* Allocate a new ipcp_value holding a tree constant, initialize its value to |
1818 | SOURCE and clear all other fields. */ | |
310bc633 | 1819 | |
c0cb5055 MJ |
1820 | static ipcp_value<tree> * |
1821 | allocate_and_init_ipcp_value (tree source) | |
310bc633 | 1822 | { |
c0cb5055 | 1823 | ipcp_value<tree> *val; |
310bc633 | 1824 | |
c3684b7b | 1825 | val = new (ipcp_cst_values_pool.allocate ()) ipcp_value<tree>(); |
44210a96 MJ |
1826 | val->value = source; |
1827 | return val; | |
1828 | } | |
1829 | ||
1830 | /* Allocate a new ipcp_value holding a polymorphic context, initialize its | |
1831 | value to SOURCE and clear all other fields. */ | |
1832 | ||
1833 | static ipcp_value<ipa_polymorphic_call_context> * | |
1834 | allocate_and_init_ipcp_value (ipa_polymorphic_call_context source) | |
1835 | { | |
1836 | ipcp_value<ipa_polymorphic_call_context> *val; | |
1837 | ||
2651e637 | 1838 | // TODO |
c3684b7b MS |
1839 | val = new (ipcp_poly_ctx_values_pool.allocate ()) |
1840 | ipcp_value<ipa_polymorphic_call_context>(); | |
c0cb5055 MJ |
1841 | val->value = source; |
1842 | return val; | |
1843 | } | |
1844 | ||
1845 | /* Try to add NEWVAL to LAT, potentially creating a new ipcp_value for it. CS, | |
1846 | SRC_VAL SRC_INDEX and OFFSET are meant for add_source and have the same | |
1847 | meaning. OFFSET -1 means the source is scalar and not a part of an | |
9b14fc33 FX |
1848 | aggregate. If non-NULL, VAL_P records address of existing or newly added |
1849 | ipcp_value. UNLIMITED means whether value count should not exceed the limit | |
1850 | given by PARAM_IPA_CP_VALUE_LIST_SIZE. */ | |
c0cb5055 MJ |
1851 | |
1852 | template <typename valtype> | |
1853 | bool | |
1854 | ipcp_lattice<valtype>::add_value (valtype newval, cgraph_edge *cs, | |
1855 | ipcp_value<valtype> *src_val, | |
9b14fc33 FX |
1856 | int src_idx, HOST_WIDE_INT offset, |
1857 | ipcp_value<valtype> **val_p, | |
1858 | bool unlimited) | |
c0cb5055 | 1859 | { |
9b14fc33 FX |
1860 | ipcp_value<valtype> *val, *last_val = NULL; |
1861 | ||
1862 | if (val_p) | |
1863 | *val_p = NULL; | |
c0cb5055 MJ |
1864 | |
1865 | if (bottom) | |
310bc633 MJ |
1866 | return false; |
1867 | ||
9b14fc33 | 1868 | for (val = values; val; last_val = val, val = val->next) |
310bc633 MJ |
1869 | if (values_equal_for_ipcp_p (val->value, newval)) |
1870 | { | |
9b14fc33 FX |
1871 | if (val_p) |
1872 | *val_p = val; | |
1873 | ||
4cb13597 | 1874 | if (ipa_edge_within_scc (cs)) |
310bc633 | 1875 | { |
c0cb5055 | 1876 | ipcp_value_source<valtype> *s; |
155c9907 | 1877 | for (s = val->sources; s; s = s->next) |
a0f6a8cb | 1878 | if (s->cs == cs && s->val == src_val) |
310bc633 MJ |
1879 | break; |
1880 | if (s) | |
1881 | return false; | |
1882 | } | |
1883 | ||
c0cb5055 | 1884 | val->add_source (cs, src_val, src_idx, offset); |
310bc633 MJ |
1885 | return false; |
1886 | } | |
1887 | ||
fdfd7f53 ML |
1888 | if (!unlimited && values_count == opt_for_fn (cs->caller->decl, |
1889 | param_ipa_cp_value_list_size)) | |
310bc633 MJ |
1890 | { |
1891 | /* We can only free sources, not the values themselves, because sources | |
026c3cfd | 1892 | of other values in this SCC might point to them. */ |
c0cb5055 | 1893 | for (val = values; val; val = val->next) |
310bc633 MJ |
1894 | { |
1895 | while (val->sources) | |
1896 | { | |
c0cb5055 | 1897 | ipcp_value_source<valtype> *src = val->sources; |
310bc633 | 1898 | val->sources = src->next; |
2651e637 | 1899 | ipcp_sources_pool.remove ((ipcp_value_source<tree>*)src); |
310bc633 MJ |
1900 | } |
1901 | } | |
c0cb5055 MJ |
1902 | values = NULL; |
1903 | return set_to_bottom (); | |
310bc633 MJ |
1904 | } |
1905 | ||
c0cb5055 MJ |
1906 | values_count++; |
1907 | val = allocate_and_init_ipcp_value (newval); | |
1908 | val->add_source (cs, src_val, src_idx, offset); | |
9b14fc33 FX |
1909 | val->next = NULL; |
1910 | ||
1911 | /* Add the new value to end of value list, which can reduce iterations | |
1912 | of propagation stage for recursive function. */ | |
1913 | if (last_val) | |
1914 | last_val->next = val; | |
1915 | else | |
1916 | values = val; | |
1917 | ||
1918 | if (val_p) | |
1919 | *val_p = val; | |
1920 | ||
1921 | return true; | |
1922 | } | |
1923 | ||
1924 | /* Return true, if a ipcp_value VAL is orginated from parameter value of | |
47772af1 FX |
1925 | self-feeding recursive function via some kind of pass-through jump |
1926 | function. */ | |
9b14fc33 FX |
1927 | |
1928 | static bool | |
1929 | self_recursively_generated_p (ipcp_value<tree> *val) | |
1930 | { | |
1931 | class ipa_node_params *info = NULL; | |
1932 | ||
1933 | for (ipcp_value_source<tree> *src = val->sources; src; src = src->next) | |
1934 | { | |
1935 | cgraph_edge *cs = src->cs; | |
1936 | ||
47772af1 | 1937 | if (!src->val || cs->caller != cs->callee->function_symbol ()) |
9b14fc33 FX |
1938 | return false; |
1939 | ||
47772af1 FX |
1940 | if (src->val == val) |
1941 | continue; | |
1942 | ||
9b14fc33 FX |
1943 | if (!info) |
1944 | info = IPA_NODE_REF (cs->caller); | |
1945 | ||
1946 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, | |
1947 | src->index); | |
42d73fa9 | 1948 | ipcp_lattice<tree> *src_lat; |
9b14fc33 FX |
1949 | ipcp_value<tree> *src_val; |
1950 | ||
42d73fa9 FX |
1951 | if (src->offset == -1) |
1952 | src_lat = &plats->itself; | |
1953 | else | |
1954 | { | |
1955 | struct ipcp_agg_lattice *src_aglat; | |
1956 | ||
1957 | for (src_aglat = plats->aggs; src_aglat; src_aglat = src_aglat->next) | |
1958 | if (src_aglat->offset == src->offset) | |
1959 | break; | |
1960 | ||
1961 | if (!src_aglat) | |
1962 | return false; | |
1963 | ||
1964 | src_lat = src_aglat; | |
1965 | } | |
1966 | ||
9b14fc33 FX |
1967 | for (src_val = src_lat->values; src_val; src_val = src_val->next) |
1968 | if (src_val == val) | |
1969 | break; | |
1970 | ||
1971 | if (!src_val) | |
1972 | return false; | |
1973 | } | |
1974 | ||
310bc633 MJ |
1975 | return true; |
1976 | } | |
fb3f88cc | 1977 | |
9b14fc33 FX |
1978 | /* A helper function that returns result of operation specified by OPCODE on |
1979 | the value of SRC_VAL. If non-NULL, OPND1_TYPE is expected type for the | |
1980 | value of SRC_VAL. If the operation is binary, OPND2 is a constant value | |
1981 | acting as its second operand. If non-NULL, RES_TYPE is expected type of | |
1982 | the result. */ | |
1983 | ||
1984 | static tree | |
1985 | get_val_across_arith_op (enum tree_code opcode, | |
1986 | tree opnd1_type, | |
1987 | tree opnd2, | |
1988 | ipcp_value<tree> *src_val, | |
1989 | tree res_type) | |
1990 | { | |
1991 | tree opnd1 = src_val->value; | |
1992 | ||
1993 | /* Skip source values that is incompatible with specified type. */ | |
1994 | if (opnd1_type | |
1995 | && !useless_type_conversion_p (opnd1_type, TREE_TYPE (opnd1))) | |
1996 | return NULL_TREE; | |
1997 | ||
1998 | return ipa_get_jf_arith_result (opcode, opnd1, opnd2, res_type); | |
1999 | } | |
2000 | ||
eb270950 FX |
2001 | /* Propagate values through an arithmetic transformation described by a jump |
2002 | function associated with edge CS, taking values from SRC_LAT and putting | |
2003 | them into DEST_LAT. OPND1_TYPE is expected type for the values in SRC_LAT. | |
2004 | OPND2 is a constant value if transformation is a binary operation. | |
2005 | SRC_OFFSET specifies offset in an aggregate if SRC_LAT describes lattice of | |
2006 | a part of the aggregate. SRC_IDX is the index of the source parameter. | |
2007 | RES_TYPE is the value type of result being propagated into. Return true if | |
2008 | DEST_LAT changed. */ | |
310bc633 MJ |
2009 | |
2010 | static bool | |
eb270950 FX |
2011 | propagate_vals_across_arith_jfunc (cgraph_edge *cs, |
2012 | enum tree_code opcode, | |
2013 | tree opnd1_type, | |
2014 | tree opnd2, | |
2015 | ipcp_lattice<tree> *src_lat, | |
2016 | ipcp_lattice<tree> *dest_lat, | |
2017 | HOST_WIDE_INT src_offset, | |
2018 | int src_idx, | |
2019 | tree res_type) | |
310bc633 | 2020 | { |
c0cb5055 | 2021 | ipcp_value<tree> *src_val; |
310bc633 MJ |
2022 | bool ret = false; |
2023 | ||
9b14fc33 FX |
2024 | /* Due to circular dependencies, propagating within an SCC through arithmetic |
2025 | transformation would create infinite number of values. But for | |
2026 | self-feeding recursive function, we could allow propagation in a limited | |
2027 | count, and this can enable a simple kind of recursive function versioning. | |
2028 | For other scenario, we would just make lattices bottom. */ | |
eb270950 | 2029 | if (opcode != NOP_EXPR && ipa_edge_within_scc (cs)) |
9b14fc33 FX |
2030 | { |
2031 | int i; | |
2032 | ||
fdfd7f53 ML |
2033 | int max_recursive_depth = opt_for_fn(cs->caller->decl, |
2034 | param_ipa_cp_max_recursive_depth); | |
2035 | if (src_lat != dest_lat || max_recursive_depth < 1) | |
9b14fc33 FX |
2036 | return dest_lat->set_contains_variable (); |
2037 | ||
2038 | /* No benefit if recursive execution is in low probability. */ | |
2039 | if (cs->sreal_frequency () * 100 | |
fdfd7f53 ML |
2040 | <= ((sreal) 1) * opt_for_fn (cs->caller->decl, |
2041 | param_ipa_cp_min_recursive_probability)) | |
9b14fc33 FX |
2042 | return dest_lat->set_contains_variable (); |
2043 | ||
2044 | auto_vec<ipcp_value<tree> *, 8> val_seeds; | |
2045 | ||
2046 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
2047 | { | |
2048 | /* Now we do not use self-recursively generated value as propagation | |
2049 | source, this is absolutely conservative, but could avoid explosion | |
2050 | of lattice's value space, especially when one recursive function | |
2051 | calls another recursive. */ | |
2052 | if (self_recursively_generated_p (src_val)) | |
2053 | { | |
2054 | ipcp_value_source<tree> *s; | |
2055 | ||
2056 | /* If the lattice has already been propagated for the call site, | |
2057 | no need to do that again. */ | |
2058 | for (s = src_val->sources; s; s = s->next) | |
2059 | if (s->cs == cs) | |
2060 | return dest_lat->set_contains_variable (); | |
2061 | } | |
2062 | else | |
2063 | val_seeds.safe_push (src_val); | |
2064 | } | |
2065 | ||
42d73fa9 FX |
2066 | gcc_assert ((int) val_seeds.length () <= param_ipa_cp_value_list_size); |
2067 | ||
9b14fc33 FX |
2068 | /* Recursively generate lattice values with a limited count. */ |
2069 | FOR_EACH_VEC_ELT (val_seeds, i, src_val) | |
2070 | { | |
fdfd7f53 | 2071 | for (int j = 1; j < max_recursive_depth; j++) |
9b14fc33 FX |
2072 | { |
2073 | tree cstval = get_val_across_arith_op (opcode, opnd1_type, opnd2, | |
2074 | src_val, res_type); | |
2075 | if (!cstval) | |
2076 | break; | |
2077 | ||
2078 | ret |= dest_lat->add_value (cstval, cs, src_val, src_idx, | |
2079 | src_offset, &src_val, true); | |
2080 | gcc_checking_assert (src_val); | |
2081 | } | |
2082 | } | |
2083 | ret |= dest_lat->set_contains_variable (); | |
2084 | } | |
310bc633 MJ |
2085 | else |
2086 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
0818c24c | 2087 | { |
9b14fc33 FX |
2088 | /* Now we do not use self-recursively generated value as propagation |
2089 | source, otherwise it is easy to make value space of normal lattice | |
2090 | overflow. */ | |
2091 | if (self_recursively_generated_p (src_val)) | |
2092 | { | |
2093 | ret |= dest_lat->set_contains_variable (); | |
2094 | continue; | |
2095 | } | |
310bc633 | 2096 | |
9b14fc33 FX |
2097 | tree cstval = get_val_across_arith_op (opcode, opnd1_type, opnd2, |
2098 | src_val, res_type); | |
310bc633 | 2099 | if (cstval) |
eb270950 FX |
2100 | ret |= dest_lat->add_value (cstval, cs, src_val, src_idx, |
2101 | src_offset); | |
310bc633 | 2102 | else |
c0cb5055 | 2103 | ret |= dest_lat->set_contains_variable (); |
0818c24c | 2104 | } |
310bc633 MJ |
2105 | |
2106 | return ret; | |
2107 | } | |
2108 | ||
eb270950 FX |
2109 | /* Propagate values through a pass-through jump function JFUNC associated with |
2110 | edge CS, taking values from SRC_LAT and putting them into DEST_LAT. SRC_IDX | |
2111 | is the index of the source parameter. PARM_TYPE is the type of the | |
2112 | parameter to which the result is passed. */ | |
2113 | ||
2114 | static bool | |
2115 | propagate_vals_across_pass_through (cgraph_edge *cs, ipa_jump_func *jfunc, | |
2116 | ipcp_lattice<tree> *src_lat, | |
2117 | ipcp_lattice<tree> *dest_lat, int src_idx, | |
2118 | tree parm_type) | |
2119 | { | |
2120 | return propagate_vals_across_arith_jfunc (cs, | |
2121 | ipa_get_jf_pass_through_operation (jfunc), | |
2122 | NULL_TREE, | |
2123 | ipa_get_jf_pass_through_operand (jfunc), | |
2124 | src_lat, dest_lat, -1, src_idx, parm_type); | |
2125 | } | |
2126 | ||
310bc633 MJ |
2127 | /* Propagate values through an ancestor jump function JFUNC associated with |
2128 | edge CS, taking values from SRC_LAT and putting them into DEST_LAT. SRC_IDX | |
2129 | is the index of the source parameter. */ | |
2130 | ||
2131 | static bool | |
155c9907 JJ |
2132 | propagate_vals_across_ancestor (struct cgraph_edge *cs, |
2133 | struct ipa_jump_func *jfunc, | |
2134 | ipcp_lattice<tree> *src_lat, | |
2135 | ipcp_lattice<tree> *dest_lat, int src_idx) | |
310bc633 | 2136 | { |
c0cb5055 | 2137 | ipcp_value<tree> *src_val; |
310bc633 MJ |
2138 | bool ret = false; |
2139 | ||
4cb13597 | 2140 | if (ipa_edge_within_scc (cs)) |
c0cb5055 | 2141 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2142 | |
2143 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
2144 | { | |
7b872d9e | 2145 | tree t = ipa_get_jf_ancestor_result (jfunc, src_val->value); |
310bc633 MJ |
2146 | |
2147 | if (t) | |
c0cb5055 | 2148 | ret |= dest_lat->add_value (t, cs, src_val, src_idx); |
310bc633 | 2149 | else |
c0cb5055 | 2150 | ret |= dest_lat->set_contains_variable (); |
310bc633 MJ |
2151 | } |
2152 | ||
2153 | return ret; | |
2154 | } | |
2155 | ||
2c9561b5 | 2156 | /* Propagate scalar values across jump function JFUNC that is associated with |
e5cf5e11 PK |
2157 | edge CS and put the values into DEST_LAT. PARM_TYPE is the type of the |
2158 | parameter to which the result is passed. */ | |
310bc633 MJ |
2159 | |
2160 | static bool | |
155c9907 JJ |
2161 | propagate_scalar_across_jump_function (struct cgraph_edge *cs, |
2162 | struct ipa_jump_func *jfunc, | |
e5cf5e11 PK |
2163 | ipcp_lattice<tree> *dest_lat, |
2164 | tree param_type) | |
310bc633 MJ |
2165 | { |
2166 | if (dest_lat->bottom) | |
2167 | return false; | |
2168 | ||
44210a96 | 2169 | if (jfunc->type == IPA_JF_CONST) |
310bc633 | 2170 | { |
44210a96 | 2171 | tree val = ipa_get_jf_constant (jfunc); |
c0cb5055 | 2172 | return dest_lat->add_value (val, cs, NULL, 0); |
310bc633 MJ |
2173 | } |
2174 | else if (jfunc->type == IPA_JF_PASS_THROUGH | |
2175 | || jfunc->type == IPA_JF_ANCESTOR) | |
2176 | { | |
99b1c316 | 2177 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
c0cb5055 | 2178 | ipcp_lattice<tree> *src_lat; |
310bc633 MJ |
2179 | int src_idx; |
2180 | bool ret; | |
2181 | ||
2182 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
7b872d9e | 2183 | src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
310bc633 | 2184 | else |
7b872d9e | 2185 | src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
310bc633 | 2186 | |
2c9561b5 | 2187 | src_lat = ipa_get_scalar_lat (caller_info, src_idx); |
310bc633 | 2188 | if (src_lat->bottom) |
c0cb5055 | 2189 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2190 | |
2191 | /* If we would need to clone the caller and cannot, do not propagate. */ | |
2192 | if (!ipcp_versionable_function_p (cs->caller) | |
2193 | && (src_lat->contains_variable | |
2194 | || (src_lat->values_count > 1))) | |
c0cb5055 | 2195 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2196 | |
2197 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
155c9907 | 2198 | ret = propagate_vals_across_pass_through (cs, jfunc, src_lat, |
e5cf5e11 | 2199 | dest_lat, src_idx, param_type); |
310bc633 | 2200 | else |
155c9907 JJ |
2201 | ret = propagate_vals_across_ancestor (cs, jfunc, src_lat, dest_lat, |
2202 | src_idx); | |
310bc633 MJ |
2203 | |
2204 | if (src_lat->contains_variable) | |
c0cb5055 | 2205 | ret |= dest_lat->set_contains_variable (); |
310bc633 MJ |
2206 | |
2207 | return ret; | |
2208 | } | |
2209 | ||
2210 | /* TODO: We currently do not handle member method pointers in IPA-CP (we only | |
2211 | use it for indirect inlining), we should propagate them too. */ | |
c0cb5055 | 2212 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2213 | } |
2214 | ||
44210a96 MJ |
2215 | /* Propagate scalar values across jump function JFUNC that is associated with |
2216 | edge CS and describes argument IDX and put the values into DEST_LAT. */ | |
2217 | ||
2218 | static bool | |
155c9907 | 2219 | propagate_context_across_jump_function (cgraph_edge *cs, |
44210a96 MJ |
2220 | ipa_jump_func *jfunc, int idx, |
2221 | ipcp_lattice<ipa_polymorphic_call_context> *dest_lat) | |
2222 | { | |
2223 | ipa_edge_args *args = IPA_EDGE_REF (cs); | |
2224 | if (dest_lat->bottom) | |
2225 | return false; | |
2226 | bool ret = false; | |
2227 | bool added_sth = false; | |
df0d8136 | 2228 | bool type_preserved = true; |
44210a96 MJ |
2229 | |
2230 | ipa_polymorphic_call_context edge_ctx, *edge_ctx_ptr | |
2231 | = ipa_get_ith_polymorhic_call_context (args, idx); | |
2232 | ||
2233 | if (edge_ctx_ptr) | |
df0d8136 | 2234 | edge_ctx = *edge_ctx_ptr; |
44210a96 MJ |
2235 | |
2236 | if (jfunc->type == IPA_JF_PASS_THROUGH | |
2237 | || jfunc->type == IPA_JF_ANCESTOR) | |
2238 | { | |
99b1c316 | 2239 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
44210a96 MJ |
2240 | int src_idx; |
2241 | ipcp_lattice<ipa_polymorphic_call_context> *src_lat; | |
2242 | ||
2243 | /* TODO: Once we figure out how to propagate speculations, it will | |
2244 | probably be a good idea to switch to speculation if type_preserved is | |
2245 | not set instead of punting. */ | |
2246 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
2247 | { | |
df0d8136 | 2248 | if (ipa_get_jf_pass_through_operation (jfunc) != NOP_EXPR) |
44210a96 | 2249 | goto prop_fail; |
df0d8136 | 2250 | type_preserved = ipa_get_jf_pass_through_type_preserved (jfunc); |
44210a96 MJ |
2251 | src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
2252 | } | |
2253 | else | |
2254 | { | |
df0d8136 | 2255 | type_preserved = ipa_get_jf_ancestor_type_preserved (jfunc); |
44210a96 MJ |
2256 | src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
2257 | } | |
2258 | ||
2259 | src_lat = ipa_get_poly_ctx_lat (caller_info, src_idx); | |
2260 | /* If we would need to clone the caller and cannot, do not propagate. */ | |
2261 | if (!ipcp_versionable_function_p (cs->caller) | |
2262 | && (src_lat->contains_variable | |
2263 | || (src_lat->values_count > 1))) | |
2264 | goto prop_fail; | |
44210a96 MJ |
2265 | |
2266 | ipcp_value<ipa_polymorphic_call_context> *src_val; | |
2267 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
2268 | { | |
2269 | ipa_polymorphic_call_context cur = src_val->value; | |
df0d8136 JH |
2270 | |
2271 | if (!type_preserved) | |
2272 | cur.possible_dynamic_type_change (cs->in_polymorphic_cdtor); | |
44210a96 MJ |
2273 | if (jfunc->type == IPA_JF_ANCESTOR) |
2274 | cur.offset_by (ipa_get_jf_ancestor_offset (jfunc)); | |
df0d8136 JH |
2275 | /* TODO: In cases we know how the context is going to be used, |
2276 | we can improve the result by passing proper OTR_TYPE. */ | |
2277 | cur.combine_with (edge_ctx); | |
44210a96 MJ |
2278 | if (!cur.useless_p ()) |
2279 | { | |
df0d8136 JH |
2280 | if (src_lat->contains_variable |
2281 | && !edge_ctx.equal_to (cur)) | |
2282 | ret |= dest_lat->set_contains_variable (); | |
44210a96 MJ |
2283 | ret |= dest_lat->add_value (cur, cs, src_val, src_idx); |
2284 | added_sth = true; | |
2285 | } | |
2286 | } | |
44210a96 MJ |
2287 | } |
2288 | ||
2289 | prop_fail: | |
2290 | if (!added_sth) | |
2291 | { | |
2292 | if (!edge_ctx.useless_p ()) | |
2293 | ret |= dest_lat->add_value (edge_ctx, cs); | |
2294 | else | |
2295 | ret |= dest_lat->set_contains_variable (); | |
2296 | } | |
2297 | ||
2298 | return ret; | |
2299 | } | |
2300 | ||
209ca542 PK |
2301 | /* Propagate bits across jfunc that is associated with |
2302 | edge cs and update dest_lattice accordingly. */ | |
2303 | ||
2304 | bool | |
155c9907 JJ |
2305 | propagate_bits_across_jump_function (cgraph_edge *cs, int idx, |
2306 | ipa_jump_func *jfunc, | |
2307 | ipcp_bits_lattice *dest_lattice) | |
209ca542 PK |
2308 | { |
2309 | if (dest_lattice->bottom_p ()) | |
2310 | return false; | |
2311 | ||
2312 | enum availability availability; | |
2313 | cgraph_node *callee = cs->callee->function_symbol (&availability); | |
99b1c316 | 2314 | class ipa_node_params *callee_info = IPA_NODE_REF (callee); |
209ca542 PK |
2315 | tree parm_type = ipa_get_type (callee_info, idx); |
2316 | ||
b93f25ad ML |
2317 | /* For K&R C programs, ipa_get_type() could return NULL_TREE. Avoid the |
2318 | transform for these cases. Similarly, we can have bad type mismatches | |
2319 | with LTO, avoid doing anything with those too. */ | |
2320 | if (!parm_type | |
2321 | || (!INTEGRAL_TYPE_P (parm_type) && !POINTER_TYPE_P (parm_type))) | |
209ca542 PK |
2322 | { |
2323 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
b93f25ad ML |
2324 | fprintf (dump_file, "Setting dest_lattice to bottom, because type of " |
2325 | "param %i of %s is NULL or unsuitable for bits propagation\n", | |
3629ff8a | 2326 | idx, cs->callee->dump_name ()); |
209ca542 PK |
2327 | |
2328 | return dest_lattice->set_to_bottom (); | |
2329 | } | |
2330 | ||
2331 | unsigned precision = TYPE_PRECISION (parm_type); | |
2332 | signop sgn = TYPE_SIGN (parm_type); | |
2333 | ||
67b97478 PK |
2334 | if (jfunc->type == IPA_JF_PASS_THROUGH |
2335 | || jfunc->type == IPA_JF_ANCESTOR) | |
209ca542 | 2336 | { |
99b1c316 | 2337 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
209ca542 | 2338 | tree operand = NULL_TREE; |
67b97478 PK |
2339 | enum tree_code code; |
2340 | unsigned src_idx; | |
209ca542 | 2341 | |
67b97478 PK |
2342 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
2343 | { | |
2344 | code = ipa_get_jf_pass_through_operation (jfunc); | |
2345 | src_idx = ipa_get_jf_pass_through_formal_id (jfunc); | |
2346 | if (code != NOP_EXPR) | |
2347 | operand = ipa_get_jf_pass_through_operand (jfunc); | |
2348 | } | |
2349 | else | |
2350 | { | |
155c9907 | 2351 | code = POINTER_PLUS_EXPR; |
67b97478 PK |
2352 | src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
2353 | unsigned HOST_WIDE_INT offset = ipa_get_jf_ancestor_offset (jfunc) / BITS_PER_UNIT; | |
2354 | operand = build_int_cstu (size_type_node, offset); | |
2355 | } | |
209ca542 | 2356 | |
99b1c316 | 2357 | class ipcp_param_lattices *src_lats |
209ca542 PK |
2358 | = ipa_get_parm_lattices (caller_info, src_idx); |
2359 | ||
2360 | /* Try to propagate bits if src_lattice is bottom, but jfunc is known. | |
2361 | for eg consider: | |
2362 | int f(int x) | |
2363 | { | |
2364 | g (x & 0xff); | |
2365 | } | |
2366 | Assume lattice for x is bottom, however we can still propagate | |
2367 | result of x & 0xff == 0xff, which gets computed during ccp1 pass | |
2368 | and we store it in jump function during analysis stage. */ | |
2369 | ||
2370 | if (src_lats->bits_lattice.bottom_p () | |
86cd0334 MJ |
2371 | && jfunc->bits) |
2372 | return dest_lattice->meet_with (jfunc->bits->value, jfunc->bits->mask, | |
209ca542 PK |
2373 | precision); |
2374 | else | |
2375 | return dest_lattice->meet_with (src_lats->bits_lattice, precision, sgn, | |
2376 | code, operand); | |
2377 | } | |
2378 | ||
2379 | else if (jfunc->type == IPA_JF_ANCESTOR) | |
2380 | return dest_lattice->set_to_bottom (); | |
86cd0334 MJ |
2381 | else if (jfunc->bits) |
2382 | return dest_lattice->meet_with (jfunc->bits->value, jfunc->bits->mask, | |
2383 | precision); | |
209ca542 PK |
2384 | else |
2385 | return dest_lattice->set_to_bottom (); | |
2386 | } | |
2387 | ||
8bc5448f | 2388 | /* Propagate value range across jump function JFUNC that is associated with |
5d5f1e95 KV |
2389 | edge CS with param of callee of PARAM_TYPE and update DEST_PLATS |
2390 | accordingly. */ | |
8bc5448f KV |
2391 | |
2392 | static bool | |
155c9907 | 2393 | propagate_vr_across_jump_function (cgraph_edge *cs, ipa_jump_func *jfunc, |
99b1c316 | 2394 | class ipcp_param_lattices *dest_plats, |
155c9907 | 2395 | tree param_type) |
8bc5448f | 2396 | { |
8bc5448f KV |
2397 | ipcp_vr_lattice *dest_lat = &dest_plats->m_value_range; |
2398 | ||
2399 | if (dest_lat->bottom_p ()) | |
2400 | return false; | |
2401 | ||
5d5f1e95 KV |
2402 | if (!param_type |
2403 | || (!INTEGRAL_TYPE_P (param_type) | |
2404 | && !POINTER_TYPE_P (param_type))) | |
2405 | return dest_lat->set_to_bottom (); | |
2406 | ||
8bc5448f KV |
2407 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
2408 | { | |
a5e14a42 | 2409 | enum tree_code operation = ipa_get_jf_pass_through_operation (jfunc); |
2b89b748 JH |
2410 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
2411 | int src_idx = ipa_get_jf_pass_through_formal_id (jfunc); | |
2412 | class ipcp_param_lattices *src_lats | |
2413 | = ipa_get_parm_lattices (caller_info, src_idx); | |
2414 | tree operand_type = ipa_get_type (caller_info, src_idx); | |
8bc5448f | 2415 | |
2b89b748 JH |
2416 | if (src_lats->m_value_range.bottom_p ()) |
2417 | return dest_lat->set_to_bottom (); | |
2418 | ||
2419 | value_range vr; | |
a5e14a42 | 2420 | if (TREE_CODE_CLASS (operation) == tcc_unary) |
27f418b8 JJ |
2421 | ipa_vr_operation_and_type_effects (&vr, |
2422 | &src_lats->m_value_range.m_vr, | |
2423 | operation, param_type, | |
2424 | operand_type); | |
2b89b748 JH |
2425 | /* A crude way to prevent unbounded number of value range updates |
2426 | in SCC components. We should allow limited number of updates within | |
2427 | SCC, too. */ | |
2428 | else if (!ipa_edge_within_scc (cs)) | |
2429 | { | |
2430 | tree op = ipa_get_jf_pass_through_operand (jfunc); | |
2431 | value_range op_vr (op, op); | |
2432 | value_range op_res,res; | |
2433 | ||
2434 | range_fold_binary_expr (&op_res, operation, operand_type, | |
2435 | &src_lats->m_value_range.m_vr, &op_vr); | |
2436 | ipa_vr_operation_and_type_effects (&vr, | |
2437 | &op_res, | |
2438 | NOP_EXPR, param_type, | |
2439 | operand_type); | |
2440 | } | |
2441 | if (!vr.undefined_p () && !vr.varying_p ()) | |
2442 | { | |
2443 | if (jfunc->m_vr) | |
2444 | { | |
2445 | value_range jvr; | |
2446 | if (ipa_vr_operation_and_type_effects (&jvr, jfunc->m_vr, | |
2447 | NOP_EXPR, | |
2448 | param_type, | |
2449 | jfunc->m_vr->type ())) | |
27f418b8 | 2450 | vr.intersect (jvr); |
2b89b748 JH |
2451 | } |
2452 | return dest_lat->meet_with (&vr); | |
a2b4c188 | 2453 | } |
8bc5448f KV |
2454 | } |
2455 | else if (jfunc->type == IPA_JF_CONST) | |
2456 | { | |
2457 | tree val = ipa_get_jf_constant (jfunc); | |
2458 | if (TREE_CODE (val) == INTEGER_CST) | |
2459 | { | |
7d22d5a3 | 2460 | val = fold_convert (param_type, val); |
1e401340 KV |
2461 | if (TREE_OVERFLOW_P (val)) |
2462 | val = drop_tree_overflow (val); | |
86cd0334 | 2463 | |
5d462877 | 2464 | value_range tmpvr (val, val); |
86cd0334 | 2465 | return dest_lat->meet_with (&tmpvr); |
8bc5448f KV |
2466 | } |
2467 | } | |
2468 | ||
028d81b1 | 2469 | value_range vr; |
86cd0334 MJ |
2470 | if (jfunc->m_vr |
2471 | && ipa_vr_operation_and_type_effects (&vr, jfunc->m_vr, NOP_EXPR, | |
a5e14a42 | 2472 | param_type, |
54994253 | 2473 | jfunc->m_vr->type ())) |
a5e14a42 | 2474 | return dest_lat->meet_with (&vr); |
8bc5448f KV |
2475 | else |
2476 | return dest_lat->set_to_bottom (); | |
2477 | } | |
2478 | ||
2c9561b5 MJ |
2479 | /* If DEST_PLATS already has aggregate items, check that aggs_by_ref matches |
2480 | NEW_AGGS_BY_REF and if not, mark all aggs as bottoms and return true (in all | |
2481 | other cases, return false). If there are no aggregate items, set | |
2482 | aggs_by_ref to NEW_AGGS_BY_REF. */ | |
2483 | ||
2484 | static bool | |
99b1c316 | 2485 | set_check_aggs_by_ref (class ipcp_param_lattices *dest_plats, |
2c9561b5 MJ |
2486 | bool new_aggs_by_ref) |
2487 | { | |
2488 | if (dest_plats->aggs) | |
2489 | { | |
2490 | if (dest_plats->aggs_by_ref != new_aggs_by_ref) | |
2491 | { | |
2492 | set_agg_lats_to_bottom (dest_plats); | |
2493 | return true; | |
2494 | } | |
2495 | } | |
2496 | else | |
2497 | dest_plats->aggs_by_ref = new_aggs_by_ref; | |
2498 | return false; | |
2499 | } | |
2500 | ||
2501 | /* Walk aggregate lattices in DEST_PLATS from ***AGLAT on, until ***aglat is an | |
2502 | already existing lattice for the given OFFSET and SIZE, marking all skipped | |
2503 | lattices as containing variable and checking for overlaps. If there is no | |
2504 | already existing lattice for the OFFSET and VAL_SIZE, create one, initialize | |
2505 | it with offset, size and contains_variable to PRE_EXISTING, and return true, | |
2506 | unless there are too many already. If there are two many, return false. If | |
2507 | there are overlaps turn whole DEST_PLATS to bottom and return false. If any | |
2508 | skipped lattices were newly marked as containing variable, set *CHANGE to | |
de2e0835 | 2509 | true. MAX_AGG_ITEMS is the maximum number of lattices. */ |
2c9561b5 MJ |
2510 | |
2511 | static bool | |
99b1c316 | 2512 | merge_agg_lats_step (class ipcp_param_lattices *dest_plats, |
2c9561b5 MJ |
2513 | HOST_WIDE_INT offset, HOST_WIDE_INT val_size, |
2514 | struct ipcp_agg_lattice ***aglat, | |
de2e0835 | 2515 | bool pre_existing, bool *change, int max_agg_items) |
2c9561b5 MJ |
2516 | { |
2517 | gcc_checking_assert (offset >= 0); | |
2518 | ||
2519 | while (**aglat && (**aglat)->offset < offset) | |
2520 | { | |
2521 | if ((**aglat)->offset + (**aglat)->size > offset) | |
2522 | { | |
2523 | set_agg_lats_to_bottom (dest_plats); | |
2524 | return false; | |
2525 | } | |
c0cb5055 | 2526 | *change |= (**aglat)->set_contains_variable (); |
2c9561b5 MJ |
2527 | *aglat = &(**aglat)->next; |
2528 | } | |
2529 | ||
2530 | if (**aglat && (**aglat)->offset == offset) | |
2531 | { | |
b66113e9 | 2532 | if ((**aglat)->size != val_size) |
2c9561b5 MJ |
2533 | { |
2534 | set_agg_lats_to_bottom (dest_plats); | |
2535 | return false; | |
2536 | } | |
b66113e9 MJ |
2537 | gcc_assert (!(**aglat)->next |
2538 | || (**aglat)->next->offset >= offset + val_size); | |
2c9561b5 MJ |
2539 | return true; |
2540 | } | |
2541 | else | |
2542 | { | |
2543 | struct ipcp_agg_lattice *new_al; | |
2544 | ||
2545 | if (**aglat && (**aglat)->offset < offset + val_size) | |
2546 | { | |
2547 | set_agg_lats_to_bottom (dest_plats); | |
2548 | return false; | |
2549 | } | |
de2e0835 | 2550 | if (dest_plats->aggs_count == max_agg_items) |
2c9561b5 MJ |
2551 | return false; |
2552 | dest_plats->aggs_count++; | |
2651e637 | 2553 | new_al = ipcp_agg_lattice_pool.allocate (); |
2c9561b5 MJ |
2554 | memset (new_al, 0, sizeof (*new_al)); |
2555 | ||
2556 | new_al->offset = offset; | |
2557 | new_al->size = val_size; | |
2558 | new_al->contains_variable = pre_existing; | |
2559 | ||
2560 | new_al->next = **aglat; | |
2561 | **aglat = new_al; | |
2562 | return true; | |
2563 | } | |
2564 | } | |
2565 | ||
2566 | /* Set all AGLAT and all other aggregate lattices reachable by next pointers as | |
2567 | containing an unknown value. */ | |
2568 | ||
2569 | static bool | |
2570 | set_chain_of_aglats_contains_variable (struct ipcp_agg_lattice *aglat) | |
2571 | { | |
2572 | bool ret = false; | |
2573 | while (aglat) | |
2574 | { | |
c0cb5055 | 2575 | ret |= aglat->set_contains_variable (); |
2c9561b5 MJ |
2576 | aglat = aglat->next; |
2577 | } | |
2578 | return ret; | |
2579 | } | |
2580 | ||
2581 | /* Merge existing aggregate lattices in SRC_PLATS to DEST_PLATS, subtracting | |
2582 | DELTA_OFFSET. CS is the call graph edge and SRC_IDX the index of the source | |
2583 | parameter used for lattice value sources. Return true if DEST_PLATS changed | |
2584 | in any way. */ | |
2585 | ||
2586 | static bool | |
2587 | merge_aggregate_lattices (struct cgraph_edge *cs, | |
99b1c316 MS |
2588 | class ipcp_param_lattices *dest_plats, |
2589 | class ipcp_param_lattices *src_plats, | |
2c9561b5 MJ |
2590 | int src_idx, HOST_WIDE_INT offset_delta) |
2591 | { | |
2592 | bool pre_existing = dest_plats->aggs != NULL; | |
2593 | struct ipcp_agg_lattice **dst_aglat; | |
2594 | bool ret = false; | |
2595 | ||
2596 | if (set_check_aggs_by_ref (dest_plats, src_plats->aggs_by_ref)) | |
2597 | return true; | |
2598 | if (src_plats->aggs_bottom) | |
2599 | return set_agg_lats_contain_variable (dest_plats); | |
3e452a28 MJ |
2600 | if (src_plats->aggs_contain_variable) |
2601 | ret |= set_agg_lats_contain_variable (dest_plats); | |
2c9561b5 MJ |
2602 | dst_aglat = &dest_plats->aggs; |
2603 | ||
de2e0835 MJ |
2604 | int max_agg_items = opt_for_fn (cs->callee->function_symbol ()->decl, |
2605 | param_ipa_max_agg_items); | |
2c9561b5 MJ |
2606 | for (struct ipcp_agg_lattice *src_aglat = src_plats->aggs; |
2607 | src_aglat; | |
2608 | src_aglat = src_aglat->next) | |
2609 | { | |
2610 | HOST_WIDE_INT new_offset = src_aglat->offset - offset_delta; | |
2611 | ||
2612 | if (new_offset < 0) | |
2613 | continue; | |
2614 | if (merge_agg_lats_step (dest_plats, new_offset, src_aglat->size, | |
de2e0835 | 2615 | &dst_aglat, pre_existing, &ret, max_agg_items)) |
2c9561b5 MJ |
2616 | { |
2617 | struct ipcp_agg_lattice *new_al = *dst_aglat; | |
2618 | ||
2619 | dst_aglat = &(*dst_aglat)->next; | |
2620 | if (src_aglat->bottom) | |
2621 | { | |
c0cb5055 | 2622 | ret |= new_al->set_contains_variable (); |
2c9561b5 MJ |
2623 | continue; |
2624 | } | |
2625 | if (src_aglat->contains_variable) | |
c0cb5055 MJ |
2626 | ret |= new_al->set_contains_variable (); |
2627 | for (ipcp_value<tree> *val = src_aglat->values; | |
2c9561b5 MJ |
2628 | val; |
2629 | val = val->next) | |
c0cb5055 MJ |
2630 | ret |= new_al->add_value (val->value, cs, val, src_idx, |
2631 | src_aglat->offset); | |
2c9561b5 MJ |
2632 | } |
2633 | else if (dest_plats->aggs_bottom) | |
2634 | return true; | |
2635 | } | |
2636 | ret |= set_chain_of_aglats_contains_variable (*dst_aglat); | |
2637 | return ret; | |
2638 | } | |
2639 | ||
324e93f1 MJ |
2640 | /* Determine whether there is anything to propagate FROM SRC_PLATS through a |
2641 | pass-through JFUNC and if so, whether it has conform and conforms to the | |
2642 | rules about propagating values passed by reference. */ | |
2643 | ||
2644 | static bool | |
99b1c316 | 2645 | agg_pass_through_permissible_p (class ipcp_param_lattices *src_plats, |
324e93f1 MJ |
2646 | struct ipa_jump_func *jfunc) |
2647 | { | |
2648 | return src_plats->aggs | |
2649 | && (!src_plats->aggs_by_ref | |
2650 | || ipa_get_jf_pass_through_agg_preserved (jfunc)); | |
2651 | } | |
2652 | ||
eb270950 FX |
2653 | /* Propagate values through ITEM, jump function for a part of an aggregate, |
2654 | into corresponding aggregate lattice AGLAT. CS is the call graph edge | |
2655 | associated with the jump function. Return true if AGLAT changed in any | |
2656 | way. */ | |
2657 | ||
2658 | static bool | |
2659 | propagate_aggregate_lattice (struct cgraph_edge *cs, | |
2660 | struct ipa_agg_jf_item *item, | |
2661 | struct ipcp_agg_lattice *aglat) | |
2662 | { | |
2663 | class ipa_node_params *caller_info; | |
2664 | class ipcp_param_lattices *src_plats; | |
2665 | struct ipcp_lattice<tree> *src_lat; | |
2666 | HOST_WIDE_INT src_offset; | |
2667 | int src_idx; | |
2668 | tree load_type; | |
2669 | bool ret; | |
2670 | ||
2671 | if (item->jftype == IPA_JF_CONST) | |
2672 | { | |
2673 | tree value = item->value.constant; | |
2674 | ||
2675 | gcc_checking_assert (is_gimple_ip_invariant (value)); | |
2676 | return aglat->add_value (value, cs, NULL, 0); | |
2677 | } | |
2678 | ||
2679 | gcc_checking_assert (item->jftype == IPA_JF_PASS_THROUGH | |
2680 | || item->jftype == IPA_JF_LOAD_AGG); | |
2681 | ||
2682 | caller_info = IPA_NODE_REF (cs->caller); | |
2683 | src_idx = item->value.pass_through.formal_id; | |
2684 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); | |
2685 | ||
2686 | if (item->jftype == IPA_JF_PASS_THROUGH) | |
2687 | { | |
2688 | load_type = NULL_TREE; | |
2689 | src_lat = &src_plats->itself; | |
2690 | src_offset = -1; | |
2691 | } | |
2692 | else | |
2693 | { | |
2694 | HOST_WIDE_INT load_offset = item->value.load_agg.offset; | |
2695 | struct ipcp_agg_lattice *src_aglat; | |
2696 | ||
2697 | for (src_aglat = src_plats->aggs; src_aglat; src_aglat = src_aglat->next) | |
2698 | if (src_aglat->offset >= load_offset) | |
2699 | break; | |
2700 | ||
2701 | load_type = item->value.load_agg.type; | |
2702 | if (!src_aglat | |
2703 | || src_aglat->offset > load_offset | |
2704 | || src_aglat->size != tree_to_shwi (TYPE_SIZE (load_type)) | |
2705 | || src_plats->aggs_by_ref != item->value.load_agg.by_ref) | |
2706 | return aglat->set_contains_variable (); | |
2707 | ||
2708 | src_lat = src_aglat; | |
2709 | src_offset = load_offset; | |
2710 | } | |
2711 | ||
2712 | if (src_lat->bottom | |
2713 | || (!ipcp_versionable_function_p (cs->caller) | |
2714 | && !src_lat->is_single_const ())) | |
2715 | return aglat->set_contains_variable (); | |
2716 | ||
2717 | ret = propagate_vals_across_arith_jfunc (cs, | |
2718 | item->value.pass_through.operation, | |
2719 | load_type, | |
2720 | item->value.pass_through.operand, | |
2721 | src_lat, aglat, | |
2722 | src_offset, | |
2723 | src_idx, | |
2724 | item->type); | |
2725 | ||
2726 | if (src_lat->contains_variable) | |
2727 | ret |= aglat->set_contains_variable (); | |
2728 | ||
2729 | return ret; | |
2730 | } | |
2731 | ||
2c9561b5 MJ |
2732 | /* Propagate scalar values across jump function JFUNC that is associated with |
2733 | edge CS and put the values into DEST_LAT. */ | |
2734 | ||
2735 | static bool | |
155c9907 JJ |
2736 | propagate_aggs_across_jump_function (struct cgraph_edge *cs, |
2737 | struct ipa_jump_func *jfunc, | |
99b1c316 | 2738 | class ipcp_param_lattices *dest_plats) |
2c9561b5 MJ |
2739 | { |
2740 | bool ret = false; | |
2741 | ||
2742 | if (dest_plats->aggs_bottom) | |
2743 | return false; | |
2744 | ||
2745 | if (jfunc->type == IPA_JF_PASS_THROUGH | |
2746 | && ipa_get_jf_pass_through_operation (jfunc) == NOP_EXPR) | |
2747 | { | |
99b1c316 | 2748 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
2c9561b5 | 2749 | int src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
99b1c316 | 2750 | class ipcp_param_lattices *src_plats; |
2c9561b5 MJ |
2751 | |
2752 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); | |
324e93f1 | 2753 | if (agg_pass_through_permissible_p (src_plats, jfunc)) |
2c9561b5 MJ |
2754 | { |
2755 | /* Currently we do not produce clobber aggregate jump | |
2756 | functions, replace with merging when we do. */ | |
2757 | gcc_assert (!jfunc->agg.items); | |
2758 | ret |= merge_aggregate_lattices (cs, dest_plats, src_plats, | |
2759 | src_idx, 0); | |
32633ec8 | 2760 | return ret; |
2c9561b5 | 2761 | } |
2c9561b5 MJ |
2762 | } |
2763 | else if (jfunc->type == IPA_JF_ANCESTOR | |
2764 | && ipa_get_jf_ancestor_agg_preserved (jfunc)) | |
2765 | { | |
99b1c316 | 2766 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
2c9561b5 | 2767 | int src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
99b1c316 | 2768 | class ipcp_param_lattices *src_plats; |
2c9561b5 MJ |
2769 | |
2770 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); | |
2771 | if (src_plats->aggs && src_plats->aggs_by_ref) | |
2772 | { | |
2773 | /* Currently we do not produce clobber aggregate jump | |
2774 | functions, replace with merging when we do. */ | |
2775 | gcc_assert (!jfunc->agg.items); | |
2776 | ret |= merge_aggregate_lattices (cs, dest_plats, src_plats, src_idx, | |
2777 | ipa_get_jf_ancestor_offset (jfunc)); | |
2778 | } | |
2779 | else if (!src_plats->aggs_by_ref) | |
2780 | ret |= set_agg_lats_to_bottom (dest_plats); | |
2781 | else | |
2782 | ret |= set_agg_lats_contain_variable (dest_plats); | |
32633ec8 | 2783 | return ret; |
2c9561b5 | 2784 | } |
32633ec8 FX |
2785 | |
2786 | if (jfunc->agg.items) | |
2c9561b5 MJ |
2787 | { |
2788 | bool pre_existing = dest_plats->aggs != NULL; | |
2789 | struct ipcp_agg_lattice **aglat = &dest_plats->aggs; | |
2790 | struct ipa_agg_jf_item *item; | |
2791 | int i; | |
2792 | ||
2793 | if (set_check_aggs_by_ref (dest_plats, jfunc->agg.by_ref)) | |
2794 | return true; | |
2795 | ||
de2e0835 MJ |
2796 | int max_agg_items = opt_for_fn (cs->callee->function_symbol ()->decl, |
2797 | param_ipa_max_agg_items); | |
9771b263 | 2798 | FOR_EACH_VEC_ELT (*jfunc->agg.items, i, item) |
2c9561b5 MJ |
2799 | { |
2800 | HOST_WIDE_INT val_size; | |
2801 | ||
eb270950 | 2802 | if (item->offset < 0 || item->jftype == IPA_JF_UNKNOWN) |
2c9561b5 | 2803 | continue; |
eb270950 | 2804 | val_size = tree_to_shwi (TYPE_SIZE (item->type)); |
2c9561b5 MJ |
2805 | |
2806 | if (merge_agg_lats_step (dest_plats, item->offset, val_size, | |
de2e0835 | 2807 | &aglat, pre_existing, &ret, max_agg_items)) |
2c9561b5 | 2808 | { |
eb270950 | 2809 | ret |= propagate_aggregate_lattice (cs, item, *aglat); |
2c9561b5 MJ |
2810 | aglat = &(*aglat)->next; |
2811 | } | |
2812 | else if (dest_plats->aggs_bottom) | |
2813 | return true; | |
2814 | } | |
2815 | ||
2816 | ret |= set_chain_of_aglats_contains_variable (*aglat); | |
2817 | } | |
2818 | else | |
2819 | ret |= set_agg_lats_contain_variable (dest_plats); | |
2820 | ||
2821 | return ret; | |
2822 | } | |
2823 | ||
173b7355 MJ |
2824 | /* Return true if on the way cfrom CS->caller to the final (non-alias and |
2825 | non-thunk) destination, the call passes through a thunk. */ | |
2826 | ||
2827 | static bool | |
67f3791f | 2828 | call_passes_through_thunk (cgraph_edge *cs) |
173b7355 MJ |
2829 | { |
2830 | cgraph_node *alias_or_thunk = cs->callee; | |
2831 | while (alias_or_thunk->alias) | |
2832 | alias_or_thunk = alias_or_thunk->get_alias_target (); | |
67f3791f | 2833 | return alias_or_thunk->thunk; |
173b7355 MJ |
2834 | } |
2835 | ||
310bc633 MJ |
2836 | /* Propagate constants from the caller to the callee of CS. INFO describes the |
2837 | caller. */ | |
2838 | ||
2839 | static bool | |
155c9907 | 2840 | propagate_constants_across_call (struct cgraph_edge *cs) |
310bc633 | 2841 | { |
99b1c316 | 2842 | class ipa_node_params *callee_info; |
310bc633 | 2843 | enum availability availability; |
173b7355 | 2844 | cgraph_node *callee; |
99b1c316 | 2845 | class ipa_edge_args *args; |
310bc633 | 2846 | bool ret = false; |
d7da5cc8 | 2847 | int i, args_count, parms_count; |
310bc633 | 2848 | |
d52f5295 | 2849 | callee = cs->callee->function_symbol (&availability); |
67348ccc | 2850 | if (!callee->definition) |
310bc633 | 2851 | return false; |
d52f5295 | 2852 | gcc_checking_assert (callee->has_gimple_body_p ()); |
310bc633 | 2853 | callee_info = IPA_NODE_REF (callee); |
6cf67b62 JH |
2854 | if (!callee_info) |
2855 | return false; | |
310bc633 MJ |
2856 | |
2857 | args = IPA_EDGE_REF (cs); | |
d7da5cc8 | 2858 | parms_count = ipa_get_param_count (callee_info); |
f3fec19f MJ |
2859 | if (parms_count == 0) |
2860 | return false; | |
e72763e2 JH |
2861 | if (!args |
2862 | || !opt_for_fn (cs->caller->decl, flag_ipa_cp) | |
2863 | || !opt_for_fn (cs->caller->decl, optimize)) | |
a33c028e JH |
2864 | { |
2865 | for (i = 0; i < parms_count; i++) | |
2866 | ret |= set_all_contains_variable (ipa_get_parm_lattices (callee_info, | |
2867 | i)); | |
2868 | return ret; | |
2869 | } | |
2870 | args_count = ipa_get_cs_argument_count (args); | |
310bc633 MJ |
2871 | |
2872 | /* If this call goes through a thunk we must not propagate to the first (0th) | |
2873 | parameter. However, we might need to uncover a thunk from below a series | |
2874 | of aliases first. */ | |
67f3791f | 2875 | if (call_passes_through_thunk (cs)) |
310bc633 | 2876 | { |
2c9561b5 MJ |
2877 | ret |= set_all_contains_variable (ipa_get_parm_lattices (callee_info, |
2878 | 0)); | |
310bc633 MJ |
2879 | i = 1; |
2880 | } | |
2881 | else | |
2882 | i = 0; | |
2883 | ||
d7da5cc8 | 2884 | for (; (i < args_count) && (i < parms_count); i++) |
310bc633 MJ |
2885 | { |
2886 | struct ipa_jump_func *jump_func = ipa_get_ith_jump_func (args, i); | |
99b1c316 | 2887 | class ipcp_param_lattices *dest_plats; |
a5e14a42 | 2888 | tree param_type = ipa_get_type (callee_info, i); |
310bc633 | 2889 | |
2c9561b5 | 2890 | dest_plats = ipa_get_parm_lattices (callee_info, i); |
d52f5295 | 2891 | if (availability == AVAIL_INTERPOSABLE) |
2c9561b5 | 2892 | ret |= set_all_contains_variable (dest_plats); |
310bc633 | 2893 | else |
2c9561b5 | 2894 | { |
155c9907 | 2895 | ret |= propagate_scalar_across_jump_function (cs, jump_func, |
e5cf5e11 PK |
2896 | &dest_plats->itself, |
2897 | param_type); | |
155c9907 JJ |
2898 | ret |= propagate_context_across_jump_function (cs, jump_func, i, |
2899 | &dest_plats->ctxlat); | |
2900 | ret | |
2901 | |= propagate_bits_across_jump_function (cs, i, jump_func, | |
2902 | &dest_plats->bits_lattice); | |
2903 | ret |= propagate_aggs_across_jump_function (cs, jump_func, | |
2904 | dest_plats); | |
8bc5448f | 2905 | if (opt_for_fn (callee->decl, flag_ipa_vrp)) |
155c9907 JJ |
2906 | ret |= propagate_vr_across_jump_function (cs, jump_func, |
2907 | dest_plats, param_type); | |
8bc5448f KV |
2908 | else |
2909 | ret |= dest_plats->m_value_range.set_to_bottom (); | |
2c9561b5 | 2910 | } |
310bc633 | 2911 | } |
d7da5cc8 | 2912 | for (; i < parms_count; i++) |
2c9561b5 | 2913 | ret |= set_all_contains_variable (ipa_get_parm_lattices (callee_info, i)); |
d7da5cc8 | 2914 | |
310bc633 MJ |
2915 | return ret; |
2916 | } | |
2917 | ||
2918 | /* If an indirect edge IE can be turned into a direct one based on KNOWN_VALS | |
3b97a5c7 MJ |
2919 | KNOWN_CONTEXTS, KNOWN_AGGS or AGG_REPS return the destination. The latter |
2920 | three can be NULL. If AGG_REPS is not NULL, KNOWN_AGGS is ignored. */ | |
310bc633 | 2921 | |
162712de MJ |
2922 | static tree |
2923 | ipa_get_indirect_edge_target_1 (struct cgraph_edge *ie, | |
44210a96 MJ |
2924 | vec<tree> known_csts, |
2925 | vec<ipa_polymorphic_call_context> known_contexts, | |
eb270950 | 2926 | vec<ipa_agg_value_set> known_aggs, |
231b4916 JH |
2927 | struct ipa_agg_replacement_value *agg_reps, |
2928 | bool *speculative) | |
310bc633 MJ |
2929 | { |
2930 | int param_index = ie->indirect_info->param_index; | |
44210a96 | 2931 | HOST_WIDE_INT anc_offset; |
b0d55476 | 2932 | tree t = NULL; |
85942f45 | 2933 | tree target = NULL; |
310bc633 | 2934 | |
231b4916 JH |
2935 | *speculative = false; |
2936 | ||
b0d55476 | 2937 | if (param_index == -1) |
310bc633 MJ |
2938 | return NULL_TREE; |
2939 | ||
2940 | if (!ie->indirect_info->polymorphic) | |
2941 | { | |
b0d55476 | 2942 | tree t = NULL; |
8810cc52 MJ |
2943 | |
2944 | if (ie->indirect_info->agg_contents) | |
2945 | { | |
91bb9f80 MJ |
2946 | t = NULL; |
2947 | if (agg_reps && ie->indirect_info->guaranteed_unmodified) | |
162712de | 2948 | { |
162712de MJ |
2949 | while (agg_reps) |
2950 | { | |
2951 | if (agg_reps->index == param_index | |
7b920a9a MJ |
2952 | && agg_reps->offset == ie->indirect_info->offset |
2953 | && agg_reps->by_ref == ie->indirect_info->by_ref) | |
162712de MJ |
2954 | { |
2955 | t = agg_reps->value; | |
2956 | break; | |
2957 | } | |
2958 | agg_reps = agg_reps->next; | |
2959 | } | |
2960 | } | |
91bb9f80 | 2961 | if (!t) |
8810cc52 | 2962 | { |
eb270950 | 2963 | struct ipa_agg_value_set *agg; |
91bb9f80 | 2964 | if (known_aggs.length () > (unsigned int) param_index) |
eb270950 | 2965 | agg = &known_aggs[param_index]; |
91bb9f80 MJ |
2966 | else |
2967 | agg = NULL; | |
2968 | bool from_global_constant; | |
b0d55476 JH |
2969 | t = ipa_find_agg_cst_for_param (agg, |
2970 | (unsigned) param_index | |
2971 | < known_csts.length () | |
2972 | ? known_csts[param_index] | |
2973 | : NULL, | |
91bb9f80 MJ |
2974 | ie->indirect_info->offset, |
2975 | ie->indirect_info->by_ref, | |
2976 | &from_global_constant); | |
44a71f36 MJ |
2977 | if (t |
2978 | && !from_global_constant | |
91bb9f80 MJ |
2979 | && !ie->indirect_info->guaranteed_unmodified) |
2980 | t = NULL_TREE; | |
8810cc52 | 2981 | } |
8810cc52 | 2982 | } |
b0d55476 | 2983 | else if ((unsigned) param_index < known_csts.length ()) |
44210a96 | 2984 | t = known_csts[param_index]; |
8810cc52 | 2985 | |
155c9907 JJ |
2986 | if (t |
2987 | && TREE_CODE (t) == ADDR_EXPR | |
310bc633 | 2988 | && TREE_CODE (TREE_OPERAND (t, 0)) == FUNCTION_DECL) |
81fa35bd | 2989 | return TREE_OPERAND (t, 0); |
310bc633 MJ |
2990 | else |
2991 | return NULL_TREE; | |
2992 | } | |
2993 | ||
2bf86c84 | 2994 | if (!opt_for_fn (ie->caller->decl, flag_devirtualize)) |
85942f45 JH |
2995 | return NULL_TREE; |
2996 | ||
8810cc52 | 2997 | gcc_assert (!ie->indirect_info->agg_contents); |
8b7773a4 | 2998 | anc_offset = ie->indirect_info->offset; |
310bc633 | 2999 | |
85942f45 JH |
3000 | t = NULL; |
3001 | ||
f25ae20e | 3002 | /* Try to work out value of virtual table pointer value in replacements. */ |
231b4916 | 3003 | if (!t && agg_reps && !ie->indirect_info->by_ref) |
85942f45 JH |
3004 | { |
3005 | while (agg_reps) | |
3006 | { | |
3007 | if (agg_reps->index == param_index | |
3008 | && agg_reps->offset == ie->indirect_info->offset | |
3009 | && agg_reps->by_ref) | |
3010 | { | |
3011 | t = agg_reps->value; | |
3012 | break; | |
3013 | } | |
3014 | agg_reps = agg_reps->next; | |
3015 | } | |
3016 | } | |
3017 | ||
3018 | /* Try to work out value of virtual table pointer value in known | |
3019 | aggregate values. */ | |
3020 | if (!t && known_aggs.length () > (unsigned int) param_index | |
231b4916 | 3021 | && !ie->indirect_info->by_ref) |
85942f45 | 3022 | { |
eb270950 | 3023 | struct ipa_agg_value_set *agg = &known_aggs[param_index]; |
b0d55476 JH |
3024 | t = ipa_find_agg_cst_for_param (agg, |
3025 | (unsigned) param_index | |
3026 | < known_csts.length () | |
3027 | ? known_csts[param_index] : NULL, | |
155c9907 | 3028 | ie->indirect_info->offset, true); |
85942f45 JH |
3029 | } |
3030 | ||
9de2f554 | 3031 | /* If we found the virtual table pointer, lookup the target. */ |
85942f45 | 3032 | if (t) |
9de2f554 JH |
3033 | { |
3034 | tree vtable; | |
3035 | unsigned HOST_WIDE_INT offset; | |
3036 | if (vtable_pointer_value_to_vtable (t, &vtable, &offset)) | |
3037 | { | |
2994ab20 | 3038 | bool can_refer; |
9de2f554 | 3039 | target = gimple_get_virt_method_for_vtable (ie->indirect_info->otr_token, |
2994ab20 JH |
3040 | vtable, offset, &can_refer); |
3041 | if (can_refer) | |
9de2f554 | 3042 | { |
2994ab20 | 3043 | if (!target |
cb1180d5 | 3044 | || fndecl_built_in_p (target, BUILT_IN_UNREACHABLE) |
8472fa80 | 3045 | || !possible_polymorphic_call_target_p |
d52f5295 | 3046 | (ie, cgraph_node::get (target))) |
2994ab20 JH |
3047 | { |
3048 | /* Do not speculate builtin_unreachable, it is stupid! */ | |
3049 | if (ie->indirect_info->vptr_changed) | |
3050 | return NULL; | |
3051 | target = ipa_impossible_devirt_target (ie, target); | |
3052 | } | |
155c9907 | 3053 | *speculative = ie->indirect_info->vptr_changed; |
231b4916 | 3054 | if (!*speculative) |
155c9907 | 3055 | return target; |
9de2f554 | 3056 | } |
9de2f554 JH |
3057 | } |
3058 | } | |
85942f45 | 3059 | |
44210a96 | 3060 | /* Do we know the constant value of pointer? */ |
b0d55476 | 3061 | if (!t && (unsigned) param_index < known_csts.length ()) |
44210a96 | 3062 | t = known_csts[param_index]; |
310bc633 | 3063 | |
44210a96 MJ |
3064 | gcc_checking_assert (!t || TREE_CODE (t) != TREE_BINFO); |
3065 | ||
3066 | ipa_polymorphic_call_context context; | |
3067 | if (known_contexts.length () > (unsigned int) param_index) | |
310bc633 | 3068 | { |
44210a96 | 3069 | context = known_contexts[param_index]; |
df0d8136 JH |
3070 | context.offset_by (anc_offset); |
3071 | if (ie->indirect_info->vptr_changed) | |
3072 | context.possible_dynamic_type_change (ie->in_polymorphic_cdtor, | |
3073 | ie->indirect_info->otr_type); | |
44210a96 MJ |
3074 | if (t) |
3075 | { | |
3076 | ipa_polymorphic_call_context ctx2 = ipa_polymorphic_call_context | |
3077 | (t, ie->indirect_info->otr_type, anc_offset); | |
3078 | if (!ctx2.useless_p ()) | |
3079 | context.combine_with (ctx2, ie->indirect_info->otr_type); | |
3080 | } | |
310bc633 | 3081 | } |
44210a96 | 3082 | else if (t) |
33c3b6be JH |
3083 | { |
3084 | context = ipa_polymorphic_call_context (t, ie->indirect_info->otr_type, | |
3085 | anc_offset); | |
3086 | if (ie->indirect_info->vptr_changed) | |
3087 | context.possible_dynamic_type_change (ie->in_polymorphic_cdtor, | |
3088 | ie->indirect_info->otr_type); | |
3089 | } | |
310bc633 | 3090 | else |
44210a96 | 3091 | return NULL_TREE; |
310bc633 | 3092 | |
44210a96 MJ |
3093 | vec <cgraph_node *>targets; |
3094 | bool final; | |
3095 | ||
3096 | targets = possible_polymorphic_call_targets | |
3097 | (ie->indirect_info->otr_type, | |
3098 | ie->indirect_info->otr_token, | |
3099 | context, &final); | |
3100 | if (!final || targets.length () > 1) | |
231b4916 JH |
3101 | { |
3102 | struct cgraph_node *node; | |
3103 | if (*speculative) | |
3104 | return target; | |
2bf86c84 JH |
3105 | if (!opt_for_fn (ie->caller->decl, flag_devirtualize_speculatively) |
3106 | || ie->speculative || !ie->maybe_hot_p ()) | |
231b4916 JH |
3107 | return NULL; |
3108 | node = try_speculative_devirtualization (ie->indirect_info->otr_type, | |
3109 | ie->indirect_info->otr_token, | |
3110 | context); | |
3111 | if (node) | |
3112 | { | |
3113 | *speculative = true; | |
3114 | target = node->decl; | |
3115 | } | |
3116 | else | |
3117 | return NULL; | |
3118 | } | |
44210a96 | 3119 | else |
231b4916 JH |
3120 | { |
3121 | *speculative = false; | |
3122 | if (targets.length () == 1) | |
3123 | target = targets[0]->decl; | |
3124 | else | |
3125 | target = ipa_impossible_devirt_target (ie, NULL_TREE); | |
3126 | } | |
b5165eb0 MJ |
3127 | |
3128 | if (target && !possible_polymorphic_call_target_p (ie, | |
d52f5295 | 3129 | cgraph_node::get (target))) |
2994ab20 JH |
3130 | { |
3131 | if (*speculative) | |
3132 | return NULL; | |
3133 | target = ipa_impossible_devirt_target (ie, target); | |
3134 | } | |
450ad0cd JH |
3135 | |
3136 | return target; | |
310bc633 MJ |
3137 | } |
3138 | ||
9d5af1db MJ |
3139 | /* If an indirect edge IE can be turned into a direct one based on data in |
3140 | AVALS, return the destination. Store into *SPECULATIVE a boolean determinig | |
3141 | whether the discovered target is only speculative guess. */ | |
162712de | 3142 | |
9d5af1db MJ |
3143 | tree |
3144 | ipa_get_indirect_edge_target (struct cgraph_edge *ie, | |
3145 | ipa_call_arg_values *avals, | |
3146 | bool *speculative) | |
3147 | { | |
3148 | return ipa_get_indirect_edge_target_1 (ie, avals->m_known_vals, | |
3149 | avals->m_known_contexts, | |
3150 | avals->m_known_aggs, | |
3151 | NULL, speculative); | |
3152 | } | |
3153 | ||
3154 | /* The same functionality as above overloaded for ipa_auto_call_arg_values. */ | |
162712de MJ |
3155 | |
3156 | tree | |
3157 | ipa_get_indirect_edge_target (struct cgraph_edge *ie, | |
9d5af1db | 3158 | ipa_auto_call_arg_values *avals, |
231b4916 | 3159 | bool *speculative) |
162712de | 3160 | { |
9d5af1db MJ |
3161 | return ipa_get_indirect_edge_target_1 (ie, avals->m_known_vals, |
3162 | avals->m_known_contexts, | |
3163 | avals->m_known_aggs, | |
3164 | NULL, speculative); | |
162712de MJ |
3165 | } |
3166 | ||
9d5af1db MJ |
3167 | /* Calculate devirtualization time bonus for NODE, assuming we know information |
3168 | about arguments stored in AVALS. */ | |
310bc633 MJ |
3169 | |
3170 | static int | |
3171 | devirtualization_time_bonus (struct cgraph_node *node, | |
9d5af1db | 3172 | ipa_auto_call_arg_values *avals) |
310bc633 MJ |
3173 | { |
3174 | struct cgraph_edge *ie; | |
3175 | int res = 0; | |
3176 | ||
3177 | for (ie = node->indirect_calls; ie; ie = ie->next_callee) | |
3178 | { | |
3179 | struct cgraph_node *callee; | |
99b1c316 | 3180 | class ipa_fn_summary *isummary; |
8ad274d2 | 3181 | enum availability avail; |
81fa35bd | 3182 | tree target; |
231b4916 | 3183 | bool speculative; |
310bc633 | 3184 | |
9d5af1db | 3185 | target = ipa_get_indirect_edge_target (ie, avals, &speculative); |
310bc633 MJ |
3186 | if (!target) |
3187 | continue; | |
3188 | ||
3189 | /* Only bare minimum benefit for clearly un-inlineable targets. */ | |
3190 | res += 1; | |
d52f5295 | 3191 | callee = cgraph_node::get (target); |
67348ccc | 3192 | if (!callee || !callee->definition) |
310bc633 | 3193 | continue; |
d52f5295 | 3194 | callee = callee->function_symbol (&avail); |
8ad274d2 JH |
3195 | if (avail < AVAIL_AVAILABLE) |
3196 | continue; | |
56f62793 | 3197 | isummary = ipa_fn_summaries->get (callee); |
8472660b | 3198 | if (!isummary || !isummary->inlinable) |
310bc633 MJ |
3199 | continue; |
3200 | ||
f658ad30 | 3201 | int size = ipa_size_summaries->get (callee)->size; |
310bc633 MJ |
3202 | /* FIXME: The values below need re-considering and perhaps also |
3203 | integrating into the cost metrics, at lest in some very basic way. */ | |
78a502ca ML |
3204 | int max_inline_insns_auto |
3205 | = opt_for_fn (callee->decl, param_max_inline_insns_auto); | |
3206 | if (size <= max_inline_insns_auto / 4) | |
231b4916 | 3207 | res += 31 / ((int)speculative + 1); |
78a502ca | 3208 | else if (size <= max_inline_insns_auto / 2) |
231b4916 | 3209 | res += 15 / ((int)speculative + 1); |
78a502ca | 3210 | else if (size <= max_inline_insns_auto |
67348ccc | 3211 | || DECL_DECLARED_INLINE_P (callee->decl)) |
231b4916 | 3212 | res += 7 / ((int)speculative + 1); |
310bc633 MJ |
3213 | } |
3214 | ||
3215 | return res; | |
3216 | } | |
3217 | ||
1e7fdc02 | 3218 | /* Return time bonus incurred because of hints stored in ESTIMATES. */ |
2c9561b5 MJ |
3219 | |
3220 | static int | |
1e7fdc02 | 3221 | hint_time_bonus (cgraph_node *node, const ipa_call_estimates &estimates) |
2c9561b5 | 3222 | { |
19321415 | 3223 | int result = 0; |
1e7fdc02 | 3224 | ipa_hints hints = estimates.hints; |
2c9561b5 | 3225 | if (hints & (INLINE_HINT_loop_iterations | INLINE_HINT_loop_stride)) |
fdfd7f53 | 3226 | result += opt_for_fn (node->decl, param_ipa_cp_loop_hint_bonus); |
67ce9099 MJ |
3227 | |
3228 | sreal bonus_for_one = opt_for_fn (node->decl, param_ipa_cp_loop_hint_bonus); | |
3229 | ||
3230 | if (hints & INLINE_HINT_loop_iterations) | |
3231 | result += (estimates.loops_with_known_iterations * bonus_for_one).to_int (); | |
3232 | ||
3233 | if (hints & INLINE_HINT_loop_stride) | |
3234 | result += (estimates.loops_with_known_strides * bonus_for_one).to_int (); | |
3235 | ||
19321415 | 3236 | return result; |
2c9561b5 MJ |
3237 | } |
3238 | ||
af21714c MJ |
3239 | /* If there is a reason to penalize the function described by INFO in the |
3240 | cloning goodness evaluation, do so. */ | |
3241 | ||
b86aedb0 | 3242 | static inline sreal |
fdfd7f53 | 3243 | incorporate_penalties (cgraph_node *node, ipa_node_params *info, |
b86aedb0 | 3244 | sreal evaluation) |
af21714c | 3245 | { |
9b14fc33 | 3246 | if (info->node_within_scc && !info->node_is_self_scc) |
af21714c | 3247 | evaluation = (evaluation |
fdfd7f53 ML |
3248 | * (100 - opt_for_fn (node->decl, |
3249 | param_ipa_cp_recursion_penalty))) / 100; | |
af21714c MJ |
3250 | |
3251 | if (info->node_calling_single_call) | |
3252 | evaluation = (evaluation | |
fdfd7f53 ML |
3253 | * (100 - opt_for_fn (node->decl, |
3254 | param_ipa_cp_single_call_penalty))) | |
af21714c MJ |
3255 | / 100; |
3256 | ||
3257 | return evaluation; | |
3258 | } | |
3259 | ||
310bc633 MJ |
3260 | /* Return true if cloning NODE is a good idea, given the estimated TIME_BENEFIT |
3261 | and SIZE_COST and with the sum of frequencies of incoming edges to the | |
3262 | potential new clone in FREQUENCIES. */ | |
3263 | ||
3264 | static bool | |
b86aedb0 MJ |
3265 | good_cloning_opportunity_p (struct cgraph_node *node, sreal time_benefit, |
3266 | sreal freq_sum, profile_count count_sum, | |
3267 | int size_cost) | |
310bc633 MJ |
3268 | { |
3269 | if (time_benefit == 0 | |
2bf86c84 | 3270 | || !opt_for_fn (node->decl, flag_ipa_cp_clone) |
5af56ae8 | 3271 | || node->optimize_for_size_p ()) |
310bc633 MJ |
3272 | return false; |
3273 | ||
df0227c4 | 3274 | gcc_assert (size_cost > 0); |
310bc633 | 3275 | |
99b1c316 | 3276 | class ipa_node_params *info = IPA_NODE_REF (node); |
fdfd7f53 | 3277 | int eval_threshold = opt_for_fn (node->decl, param_ipa_cp_eval_threshold); |
3995f3a2 | 3278 | if (max_count > profile_count::zero ()) |
310bc633 | 3279 | { |
b86aedb0 MJ |
3280 | |
3281 | sreal factor = count_sum.probability_in (max_count).to_sreal (); | |
3282 | sreal evaluation = (time_benefit * factor) / size_cost; | |
fdfd7f53 | 3283 | evaluation = incorporate_penalties (node, info, evaluation); |
b86aedb0 | 3284 | evaluation *= 1000; |
310bc633 MJ |
3285 | |
3286 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3995f3a2 | 3287 | { |
b86aedb0 MJ |
3288 | fprintf (dump_file, " good_cloning_opportunity_p (time: %g, " |
3289 | "size: %i, count_sum: ", time_benefit.to_double (), | |
3290 | size_cost); | |
3995f3a2 | 3291 | count_sum.dump (dump_file); |
b86aedb0 | 3292 | fprintf (dump_file, "%s%s) -> evaluation: %.2f, threshold: %i\n", |
9b14fc33 FX |
3293 | info->node_within_scc |
3294 | ? (info->node_is_self_scc ? ", self_scc" : ", scc") : "", | |
af21714c | 3295 | info->node_calling_single_call ? ", single_call" : "", |
b86aedb0 | 3296 | evaluation.to_double (), eval_threshold); |
3995f3a2 | 3297 | } |
310bc633 | 3298 | |
b86aedb0 | 3299 | return evaluation.to_int () >= eval_threshold; |
310bc633 MJ |
3300 | } |
3301 | else | |
3302 | { | |
b86aedb0 | 3303 | sreal evaluation = (time_benefit * freq_sum) / size_cost; |
fdfd7f53 | 3304 | evaluation = incorporate_penalties (node, info, evaluation); |
b86aedb0 | 3305 | evaluation *= 1000; |
310bc633 MJ |
3306 | |
3307 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
b86aedb0 MJ |
3308 | fprintf (dump_file, " good_cloning_opportunity_p (time: %g, " |
3309 | "size: %i, freq_sum: %g%s%s) -> evaluation: %.2f, " | |
3310 | "threshold: %i\n", | |
3311 | time_benefit.to_double (), size_cost, freq_sum.to_double (), | |
9b14fc33 FX |
3312 | info->node_within_scc |
3313 | ? (info->node_is_self_scc ? ", self_scc" : ", scc") : "", | |
af21714c | 3314 | info->node_calling_single_call ? ", single_call" : "", |
b86aedb0 | 3315 | evaluation.to_double (), eval_threshold); |
310bc633 | 3316 | |
b86aedb0 | 3317 | return evaluation.to_int () >= eval_threshold; |
310bc633 MJ |
3318 | } |
3319 | } | |
3320 | ||
2c9561b5 MJ |
3321 | /* Return all context independent values from aggregate lattices in PLATS in a |
3322 | vector. Return NULL if there are none. */ | |
3323 | ||
eb270950 | 3324 | static vec<ipa_agg_value> |
99b1c316 | 3325 | context_independent_aggregate_values (class ipcp_param_lattices *plats) |
2c9561b5 | 3326 | { |
eb270950 | 3327 | vec<ipa_agg_value> res = vNULL; |
2c9561b5 MJ |
3328 | |
3329 | if (plats->aggs_bottom | |
3330 | || plats->aggs_contain_variable | |
3331 | || plats->aggs_count == 0) | |
eb270950 | 3332 | return vNULL; |
2c9561b5 MJ |
3333 | |
3334 | for (struct ipcp_agg_lattice *aglat = plats->aggs; | |
3335 | aglat; | |
3336 | aglat = aglat->next) | |
c0cb5055 | 3337 | if (aglat->is_single_const ()) |
2c9561b5 | 3338 | { |
eb270950 | 3339 | struct ipa_agg_value item; |
2c9561b5 MJ |
3340 | item.offset = aglat->offset; |
3341 | item.value = aglat->values->value; | |
eb270950 | 3342 | res.safe_push (item); |
2c9561b5 MJ |
3343 | } |
3344 | return res; | |
3345 | } | |
310bc633 | 3346 | |
9d5af1db MJ |
3347 | /* Grow vectors in AVALS and fill them with information about values of |
3348 | parameters that are known to be independent of the context. Only calculate | |
3349 | m_known_aggs if CALCULATE_AGGS is true. INFO describes the function. If | |
3350 | REMOVABLE_PARAMS_COST is non-NULL, the movement cost of all removable | |
3351 | parameters will be stored in it. | |
3352 | ||
3353 | TODO: Also grow context independent value range vectors. */ | |
310bc633 MJ |
3354 | |
3355 | static bool | |
99b1c316 | 3356 | gather_context_independent_values (class ipa_node_params *info, |
9d5af1db MJ |
3357 | ipa_auto_call_arg_values *avals, |
3358 | bool calculate_aggs, | |
44210a96 | 3359 | int *removable_params_cost) |
310bc633 MJ |
3360 | { |
3361 | int i, count = ipa_get_param_count (info); | |
3362 | bool ret = false; | |
3363 | ||
9d5af1db MJ |
3364 | avals->m_known_vals.safe_grow_cleared (count, true); |
3365 | avals->m_known_contexts.safe_grow_cleared (count, true); | |
3366 | if (calculate_aggs) | |
3367 | avals->m_known_aggs.safe_grow_cleared (count, true); | |
310bc633 MJ |
3368 | |
3369 | if (removable_params_cost) | |
3370 | *removable_params_cost = 0; | |
3371 | ||
155c9907 | 3372 | for (i = 0; i < count; i++) |
310bc633 | 3373 | { |
99b1c316 | 3374 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 | 3375 | ipcp_lattice<tree> *lat = &plats->itself; |
310bc633 | 3376 | |
c0cb5055 | 3377 | if (lat->is_single_const ()) |
310bc633 | 3378 | { |
c0cb5055 | 3379 | ipcp_value<tree> *val = lat->values; |
44210a96 | 3380 | gcc_checking_assert (TREE_CODE (val->value) != TREE_BINFO); |
9d5af1db | 3381 | avals->m_known_vals[i] = val->value; |
44210a96 MJ |
3382 | if (removable_params_cost) |
3383 | *removable_params_cost | |
3384 | += estimate_move_cost (TREE_TYPE (val->value), false); | |
3385 | ret = true; | |
310bc633 MJ |
3386 | } |
3387 | else if (removable_params_cost | |
3388 | && !ipa_is_param_used (info, i)) | |
3389 | *removable_params_cost | |
0e8853ee | 3390 | += ipa_get_param_move_cost (info, i); |
2c9561b5 | 3391 | |
5af56ae8 JH |
3392 | if (!ipa_is_param_used (info, i)) |
3393 | continue; | |
3394 | ||
44210a96 | 3395 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; |
5af56ae8 JH |
3396 | /* Do not account known context as reason for cloning. We can see |
3397 | if it permits devirtualization. */ | |
44210a96 | 3398 | if (ctxlat->is_single_const ()) |
9d5af1db | 3399 | avals->m_known_contexts[i] = ctxlat->values->value; |
44210a96 | 3400 | |
9d5af1db | 3401 | if (calculate_aggs) |
2c9561b5 | 3402 | { |
eb270950 FX |
3403 | vec<ipa_agg_value> agg_items; |
3404 | struct ipa_agg_value_set *agg; | |
2c9561b5 MJ |
3405 | |
3406 | agg_items = context_independent_aggregate_values (plats); | |
9d5af1db | 3407 | agg = &avals->m_known_aggs[i]; |
eb270950 FX |
3408 | agg->items = agg_items; |
3409 | agg->by_ref = plats->aggs_by_ref; | |
3410 | ret |= !agg_items.is_empty (); | |
2c9561b5 | 3411 | } |
310bc633 MJ |
3412 | } |
3413 | ||
3414 | return ret; | |
3415 | } | |
3416 | ||
9d5af1db MJ |
3417 | /* Perform time and size measurement of NODE with the context given in AVALS, |
3418 | calculate the benefit compared to the node without specialization and store | |
3419 | it into VAL. Take into account REMOVABLE_PARAMS_COST of all | |
3420 | context-independent or unused removable parameters and EST_MOVE_COST, the | |
3421 | estimated movement of the considered parameter. */ | |
c0cb5055 MJ |
3422 | |
3423 | static void | |
9d5af1db MJ |
3424 | perform_estimation_of_a_value (cgraph_node *node, |
3425 | ipa_auto_call_arg_values *avals, | |
3426 | int removable_params_cost, int est_move_cost, | |
3427 | ipcp_value_base *val) | |
c0cb5055 | 3428 | { |
b86aedb0 | 3429 | sreal time_benefit; |
1e7fdc02 | 3430 | ipa_call_estimates estimates; |
c0cb5055 | 3431 | |
1e7fdc02 | 3432 | estimate_ipcp_clone_size_and_time (node, avals, &estimates); |
59d9a0aa MJ |
3433 | |
3434 | /* Extern inline functions have no cloning local time benefits because they | |
3435 | will be inlined anyway. The only reason to clone them is if it enables | |
3436 | optimization in any of the functions they call. */ | |
3437 | if (DECL_EXTERNAL (node->decl) && DECL_DECLARED_INLINE_P (node->decl)) | |
3438 | time_benefit = 0; | |
3439 | else | |
b86aedb0 MJ |
3440 | time_benefit = (estimates.nonspecialized_time - estimates.time) |
3441 | + (devirtualization_time_bonus (node, avals) | |
3442 | + hint_time_bonus (node, estimates) | |
3443 | + removable_params_cost + est_move_cost); | |
c0cb5055 | 3444 | |
1e7fdc02 | 3445 | int size = estimates.size; |
c0cb5055 MJ |
3446 | gcc_checking_assert (size >=0); |
3447 | /* The inliner-heuristics based estimates may think that in certain | |
3448 | contexts some functions do not have any size at all but we want | |
3449 | all specializations to have at least a tiny cost, not least not to | |
3450 | divide by zero. */ | |
3451 | if (size == 0) | |
3452 | size = 1; | |
3453 | ||
3454 | val->local_time_benefit = time_benefit; | |
3455 | val->local_size_cost = size; | |
3456 | } | |
3457 | ||
f7725a48 MJ |
3458 | /* Get the overall limit oof growth based on parameters extracted from growth. |
3459 | it does not really make sense to mix functions with different overall growth | |
3460 | limits but it is possible and if it happens, we do not want to select one | |
3461 | limit at random. */ | |
3462 | ||
3463 | static long | |
3464 | get_max_overall_size (cgraph_node *node) | |
3465 | { | |
3466 | long max_new_size = orig_overall_size; | |
31584824 | 3467 | long large_unit = opt_for_fn (node->decl, param_ipa_cp_large_unit_insns); |
f7725a48 MJ |
3468 | if (max_new_size < large_unit) |
3469 | max_new_size = large_unit; | |
12122f94 | 3470 | int unit_growth = opt_for_fn (node->decl, param_ipa_cp_unit_growth); |
f7725a48 MJ |
3471 | max_new_size += max_new_size * unit_growth / 100 + 1; |
3472 | return max_new_size; | |
3473 | } | |
3474 | ||
310bc633 MJ |
3475 | /* Iterate over known values of parameters of NODE and estimate the local |
3476 | effects in terms of time and size they have. */ | |
3477 | ||
3478 | static void | |
3479 | estimate_local_effects (struct cgraph_node *node) | |
3480 | { | |
99b1c316 | 3481 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 | 3482 | int i, count = ipa_get_param_count (info); |
310bc633 | 3483 | bool always_const; |
310bc633 MJ |
3484 | int removable_params_cost; |
3485 | ||
3486 | if (!count || !ipcp_versionable_function_p (node)) | |
3487 | return; | |
3488 | ||
ca30a539 | 3489 | if (dump_file && (dump_flags & TDF_DETAILS)) |
464d0118 | 3490 | fprintf (dump_file, "\nEstimating effects for %s.\n", node->dump_name ()); |
310bc633 | 3491 | |
9d5af1db MJ |
3492 | ipa_auto_call_arg_values avals; |
3493 | always_const = gather_context_independent_values (info, &avals, true, | |
310bc633 | 3494 | &removable_params_cost); |
9d5af1db | 3495 | int devirt_bonus = devirtualization_time_bonus (node, &avals); |
dcf89d57 | 3496 | if (always_const || devirt_bonus |
87f94429 | 3497 | || (removable_params_cost && node->can_change_signature)) |
ca30a539 | 3498 | { |
310bc633 | 3499 | struct caller_statistics stats; |
1e7fdc02 | 3500 | ipa_call_estimates estimates; |
310bc633 MJ |
3501 | |
3502 | init_caller_stats (&stats); | |
d52f5295 ML |
3503 | node->call_for_symbol_thunks_and_aliases (gather_caller_stats, &stats, |
3504 | false); | |
1e7fdc02 MJ |
3505 | estimate_ipcp_clone_size_and_time (node, &avals, &estimates); |
3506 | sreal time = estimates.nonspecialized_time - estimates.time; | |
3507 | time += devirt_bonus; | |
3508 | time += hint_time_bonus (node, estimates); | |
3509 | time += removable_params_cost; | |
3510 | int size = estimates.size - stats.n_calls * removable_params_cost; | |
310bc633 MJ |
3511 | |
3512 | if (dump_file) | |
3513 | fprintf (dump_file, " - context independent values, size: %i, " | |
1e7fdc02 | 3514 | "time_benefit: %f\n", size, (time).to_double ()); |
310bc633 | 3515 | |
87f94429 | 3516 | if (size <= 0 || node->local) |
310bc633 | 3517 | { |
eb20b778 | 3518 | info->do_clone_for_all_contexts = true; |
310bc633 MJ |
3519 | |
3520 | if (dump_file) | |
3521 | fprintf (dump_file, " Decided to specialize for all " | |
3522 | "known contexts, code not going to grow.\n"); | |
3523 | } | |
b86aedb0 MJ |
3524 | else if (good_cloning_opportunity_p (node, time, stats.freq_sum, |
3525 | stats.count_sum, size)) | |
310bc633 | 3526 | { |
f7725a48 | 3527 | if (size + overall_size <= get_max_overall_size (node)) |
310bc633 | 3528 | { |
eb20b778 | 3529 | info->do_clone_for_all_contexts = true; |
310bc633 MJ |
3530 | overall_size += size; |
3531 | ||
3532 | if (dump_file) | |
3533 | fprintf (dump_file, " Decided to specialize for all " | |
91153e0a MJ |
3534 | "known contexts, growth (to %li) deemed " |
3535 | "beneficial.\n", overall_size); | |
310bc633 MJ |
3536 | } |
3537 | else if (dump_file && (dump_flags & TDF_DETAILS)) | |
f7725a48 MJ |
3538 | fprintf (dump_file, " Not cloning for all contexts because " |
3539 | "maximum unit size would be reached with %li.\n", | |
310bc633 MJ |
3540 | size + overall_size); |
3541 | } | |
5af56ae8 JH |
3542 | else if (dump_file && (dump_flags & TDF_DETAILS)) |
3543 | fprintf (dump_file, " Not cloning for all contexts because " | |
3544 | "!good_cloning_opportunity_p.\n"); | |
155c9907 | 3545 | |
ca30a539 JH |
3546 | } |
3547 | ||
155c9907 | 3548 | for (i = 0; i < count; i++) |
ca30a539 | 3549 | { |
99b1c316 | 3550 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 MJ |
3551 | ipcp_lattice<tree> *lat = &plats->itself; |
3552 | ipcp_value<tree> *val; | |
310bc633 MJ |
3553 | |
3554 | if (lat->bottom | |
3555 | || !lat->values | |
9d5af1db | 3556 | || avals.m_known_vals[i]) |
310bc633 MJ |
3557 | continue; |
3558 | ||
3559 | for (val = lat->values; val; val = val->next) | |
3560 | { | |
44210a96 | 3561 | gcc_checking_assert (TREE_CODE (val->value) != TREE_BINFO); |
9d5af1db | 3562 | avals.m_known_vals[i] = val->value; |
310bc633 | 3563 | |
44210a96 | 3564 | int emc = estimate_move_cost (TREE_TYPE (val->value), true); |
9d5af1db MJ |
3565 | perform_estimation_of_a_value (node, &avals, removable_params_cost, |
3566 | emc, val); | |
0318fc77 | 3567 | |
310bc633 MJ |
3568 | if (dump_file && (dump_flags & TDF_DETAILS)) |
3569 | { | |
3570 | fprintf (dump_file, " - estimates for value "); | |
3571 | print_ipcp_constant_value (dump_file, val->value); | |
0e8853ee JH |
3572 | fprintf (dump_file, " for "); |
3573 | ipa_dump_param (dump_file, info, i); | |
b86aedb0 MJ |
3574 | fprintf (dump_file, ": time_benefit: %g, size: %i\n", |
3575 | val->local_time_benefit.to_double (), | |
3576 | val->local_size_cost); | |
310bc633 | 3577 | } |
310bc633 | 3578 | } |
9d5af1db | 3579 | avals.m_known_vals[i] = NULL_TREE; |
2c9561b5 MJ |
3580 | } |
3581 | ||
44210a96 MJ |
3582 | for (i = 0; i < count; i++) |
3583 | { | |
99b1c316 | 3584 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
44210a96 MJ |
3585 | |
3586 | if (!plats->virt_call) | |
3587 | continue; | |
3588 | ||
3589 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; | |
3590 | ipcp_value<ipa_polymorphic_call_context> *val; | |
3591 | ||
3592 | if (ctxlat->bottom | |
3593 | || !ctxlat->values | |
9d5af1db | 3594 | || !avals.m_known_contexts[i].useless_p ()) |
44210a96 MJ |
3595 | continue; |
3596 | ||
3597 | for (val = ctxlat->values; val; val = val->next) | |
3598 | { | |
9d5af1db MJ |
3599 | avals.m_known_contexts[i] = val->value; |
3600 | perform_estimation_of_a_value (node, &avals, removable_params_cost, | |
3601 | 0, val); | |
44210a96 MJ |
3602 | |
3603 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3604 | { | |
3605 | fprintf (dump_file, " - estimates for polymorphic context "); | |
3606 | print_ipcp_constant_value (dump_file, val->value); | |
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); | |
44210a96 MJ |
3612 | } |
3613 | } | |
9d5af1db | 3614 | avals.m_known_contexts[i] = ipa_polymorphic_call_context (); |
44210a96 MJ |
3615 | } |
3616 | ||
155c9907 | 3617 | for (i = 0; i < count; i++) |
2c9561b5 | 3618 | { |
99b1c316 | 3619 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
2c9561b5 MJ |
3620 | |
3621 | if (plats->aggs_bottom || !plats->aggs) | |
3622 | continue; | |
3623 | ||
9d5af1db MJ |
3624 | ipa_agg_value_set *agg = &avals.m_known_aggs[i]; |
3625 | for (ipcp_agg_lattice *aglat = plats->aggs; aglat; aglat = aglat->next) | |
2c9561b5 | 3626 | { |
c0cb5055 | 3627 | ipcp_value<tree> *val; |
2c9561b5 MJ |
3628 | if (aglat->bottom || !aglat->values |
3629 | /* If the following is true, the one value is in known_aggs. */ | |
3630 | || (!plats->aggs_contain_variable | |
c0cb5055 | 3631 | && aglat->is_single_const ())) |
2c9561b5 MJ |
3632 | continue; |
3633 | ||
3634 | for (val = aglat->values; val; val = val->next) | |
3635 | { | |
eb270950 | 3636 | struct ipa_agg_value item; |
2c9561b5 MJ |
3637 | |
3638 | item.offset = aglat->offset; | |
3639 | item.value = val->value; | |
eb270950 | 3640 | agg->items.safe_push (item); |
2c9561b5 | 3641 | |
9d5af1db | 3642 | perform_estimation_of_a_value (node, &avals, |
c0cb5055 | 3643 | removable_params_cost, 0, val); |
2c9561b5 MJ |
3644 | |
3645 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3646 | { | |
3647 | fprintf (dump_file, " - estimates for value "); | |
3648 | print_ipcp_constant_value (dump_file, val->value); | |
0e8853ee | 3649 | fprintf (dump_file, " for "); |
155c9907 | 3650 | ipa_dump_param (dump_file, info, i); |
2c9561b5 | 3651 | fprintf (dump_file, "[%soffset: " HOST_WIDE_INT_PRINT_DEC |
b86aedb0 | 3652 | "]: time_benefit: %g, size: %i\n", |
c0cb5055 MJ |
3653 | plats->aggs_by_ref ? "ref " : "", |
3654 | aglat->offset, | |
b86aedb0 MJ |
3655 | val->local_time_benefit.to_double (), |
3656 | val->local_size_cost); | |
2c9561b5 MJ |
3657 | } |
3658 | ||
eb270950 | 3659 | agg->items.pop (); |
2c9561b5 MJ |
3660 | } |
3661 | } | |
3662 | } | |
310bc633 MJ |
3663 | } |
3664 | ||
3665 | ||
3666 | /* Add value CUR_VAL and all yet-unsorted values it is dependent on to the | |
3667 | topological sort of values. */ | |
3668 | ||
c0cb5055 MJ |
3669 | template <typename valtype> |
3670 | void | |
3671 | value_topo_info<valtype>::add_val (ipcp_value<valtype> *cur_val) | |
310bc633 | 3672 | { |
c0cb5055 | 3673 | ipcp_value_source<valtype> *src; |
310bc633 MJ |
3674 | |
3675 | if (cur_val->dfs) | |
3676 | return; | |
3677 | ||
3678 | dfs_counter++; | |
3679 | cur_val->dfs = dfs_counter; | |
3680 | cur_val->low_link = dfs_counter; | |
3681 | ||
3682 | cur_val->topo_next = stack; | |
3683 | stack = cur_val; | |
3684 | cur_val->on_stack = true; | |
3685 | ||
3686 | for (src = cur_val->sources; src; src = src->next) | |
3687 | if (src->val) | |
3688 | { | |
3689 | if (src->val->dfs == 0) | |
3690 | { | |
c0cb5055 | 3691 | add_val (src->val); |
310bc633 MJ |
3692 | if (src->val->low_link < cur_val->low_link) |
3693 | cur_val->low_link = src->val->low_link; | |
3694 | } | |
3695 | else if (src->val->on_stack | |
3696 | && src->val->dfs < cur_val->low_link) | |
3697 | cur_val->low_link = src->val->dfs; | |
3698 | } | |
3699 | ||
3700 | if (cur_val->dfs == cur_val->low_link) | |
ca30a539 | 3701 | { |
c0cb5055 | 3702 | ipcp_value<valtype> *v, *scc_list = NULL; |
310bc633 MJ |
3703 | |
3704 | do | |
3705 | { | |
3706 | v = stack; | |
3707 | stack = v->topo_next; | |
3708 | v->on_stack = false; | |
3709 | ||
3710 | v->scc_next = scc_list; | |
3711 | scc_list = v; | |
3712 | } | |
3713 | while (v != cur_val); | |
3714 | ||
3715 | cur_val->topo_next = values_topo; | |
3716 | values_topo = cur_val; | |
ca30a539 | 3717 | } |
518dc859 RL |
3718 | } |
3719 | ||
310bc633 MJ |
3720 | /* Add all values in lattices associated with NODE to the topological sort if |
3721 | they are not there yet. */ | |
3722 | ||
3723 | static void | |
c0cb5055 | 3724 | add_all_node_vals_to_toposort (cgraph_node *node, ipa_topo_info *topo) |
518dc859 | 3725 | { |
99b1c316 | 3726 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 MJ |
3727 | int i, count = ipa_get_param_count (info); |
3728 | ||
155c9907 | 3729 | for (i = 0; i < count; i++) |
310bc633 | 3730 | { |
99b1c316 | 3731 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 | 3732 | ipcp_lattice<tree> *lat = &plats->itself; |
2c9561b5 | 3733 | struct ipcp_agg_lattice *aglat; |
310bc633 | 3734 | |
2c9561b5 | 3735 | if (!lat->bottom) |
44210a96 MJ |
3736 | { |
3737 | ipcp_value<tree> *val; | |
3738 | for (val = lat->values; val; val = val->next) | |
3739 | topo->constants.add_val (val); | |
3740 | } | |
2c9561b5 MJ |
3741 | |
3742 | if (!plats->aggs_bottom) | |
3743 | for (aglat = plats->aggs; aglat; aglat = aglat->next) | |
3744 | if (!aglat->bottom) | |
44210a96 MJ |
3745 | { |
3746 | ipcp_value<tree> *val; | |
3747 | for (val = aglat->values; val; val = val->next) | |
3748 | topo->constants.add_val (val); | |
3749 | } | |
3750 | ||
3751 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; | |
3752 | if (!ctxlat->bottom) | |
3753 | { | |
3754 | ipcp_value<ipa_polymorphic_call_context> *ctxval; | |
3755 | for (ctxval = ctxlat->values; ctxval; ctxval = ctxval->next) | |
3756 | topo->contexts.add_val (ctxval); | |
3757 | } | |
310bc633 | 3758 | } |
518dc859 RL |
3759 | } |
3760 | ||
310bc633 MJ |
3761 | /* One pass of constants propagation along the call graph edges, from callers |
3762 | to callees (requires topological ordering in TOPO), iterate over strongly | |
3763 | connected components. */ | |
3764 | ||
518dc859 | 3765 | static void |
99b1c316 | 3766 | propagate_constants_topo (class ipa_topo_info *topo) |
518dc859 | 3767 | { |
310bc633 | 3768 | int i; |
518dc859 | 3769 | |
310bc633 | 3770 | for (i = topo->nnodes - 1; i >= 0; i--) |
518dc859 | 3771 | { |
39e87baf | 3772 | unsigned j; |
310bc633 | 3773 | struct cgraph_node *v, *node = topo->order[i]; |
d52f5295 | 3774 | vec<cgraph_node *> cycle_nodes = ipa_get_nodes_in_cycle (node); |
310bc633 | 3775 | |
310bc633 MJ |
3776 | /* First, iteratively propagate within the strongly connected component |
3777 | until all lattices stabilize. */ | |
39e87baf | 3778 | FOR_EACH_VEC_ELT (cycle_nodes, j, v) |
d52f5295 | 3779 | if (v->has_gimple_body_p ()) |
6cf67b62 | 3780 | { |
e72763e2 JH |
3781 | if (opt_for_fn (v->decl, flag_ipa_cp) |
3782 | && opt_for_fn (v->decl, optimize)) | |
6cf67b62 | 3783 | push_node_to_stack (topo, v); |
223f4b10 | 3784 | /* When V is not optimized, we can not push it to stack, but |
6cf67b62 JH |
3785 | still we need to set all its callees lattices to bottom. */ |
3786 | else | |
3787 | { | |
3788 | for (cgraph_edge *cs = v->callees; cs; cs = cs->next_callee) | |
3789 | propagate_constants_across_call (cs); | |
3790 | } | |
3791 | } | |
310bc633 | 3792 | |
39e87baf | 3793 | v = pop_node_from_stack (topo); |
310bc633 MJ |
3794 | while (v) |
3795 | { | |
3796 | struct cgraph_edge *cs; | |
9b14fc33 FX |
3797 | class ipa_node_params *info = NULL; |
3798 | bool self_scc = true; | |
310bc633 MJ |
3799 | |
3800 | for (cs = v->callees; cs; cs = cs->next_callee) | |
af21714c MJ |
3801 | if (ipa_edge_within_scc (cs)) |
3802 | { | |
9b14fc33 FX |
3803 | cgraph_node *callee = cs->callee->function_symbol (); |
3804 | ||
3805 | if (v != callee) | |
3806 | self_scc = false; | |
3807 | ||
3808 | if (!info) | |
3809 | { | |
3810 | info = IPA_NODE_REF (v); | |
3811 | info->node_within_scc = true; | |
3812 | } | |
3813 | ||
155c9907 | 3814 | if (propagate_constants_across_call (cs)) |
9b14fc33 | 3815 | push_node_to_stack (topo, callee); |
af21714c | 3816 | } |
9b14fc33 FX |
3817 | |
3818 | if (info) | |
3819 | info->node_is_self_scc = self_scc; | |
3820 | ||
310bc633 MJ |
3821 | v = pop_node_from_stack (topo); |
3822 | } | |
3823 | ||
3824 | /* Afterwards, propagate along edges leading out of the SCC, calculates | |
3825 | the local effects of the discovered constants and all valid values to | |
3826 | their topological sort. */ | |
39e87baf | 3827 | FOR_EACH_VEC_ELT (cycle_nodes, j, v) |
6cf67b62 | 3828 | if (v->has_gimple_body_p () |
e72763e2 JH |
3829 | && opt_for_fn (v->decl, flag_ipa_cp) |
3830 | && opt_for_fn (v->decl, optimize)) | |
39e87baf MJ |
3831 | { |
3832 | struct cgraph_edge *cs; | |
310bc633 | 3833 | |
39e87baf | 3834 | estimate_local_effects (v); |
c0cb5055 | 3835 | add_all_node_vals_to_toposort (v, topo); |
39e87baf | 3836 | for (cs = v->callees; cs; cs = cs->next_callee) |
4cb13597 | 3837 | if (!ipa_edge_within_scc (cs)) |
155c9907 | 3838 | propagate_constants_across_call (cs); |
39e87baf MJ |
3839 | } |
3840 | cycle_nodes.release (); | |
518dc859 RL |
3841 | } |
3842 | } | |
3843 | ||
310bc633 | 3844 | /* Propagate the estimated effects of individual values along the topological |
073a8998 | 3845 | from the dependent values to those they depend on. */ |
310bc633 | 3846 | |
c0cb5055 MJ |
3847 | template <typename valtype> |
3848 | void | |
3849 | value_topo_info<valtype>::propagate_effects () | |
518dc859 | 3850 | { |
c0cb5055 | 3851 | ipcp_value<valtype> *base; |
a6a0db7d | 3852 | hash_set<ipcp_value<valtype> *> processed_srcvals; |
518dc859 | 3853 | |
310bc633 | 3854 | for (base = values_topo; base; base = base->topo_next) |
518dc859 | 3855 | { |
c0cb5055 MJ |
3856 | ipcp_value_source<valtype> *src; |
3857 | ipcp_value<valtype> *val; | |
b86aedb0 | 3858 | sreal time = 0; |
a6a0db7d | 3859 | HOST_WIDE_INT size = 0; |
310bc633 MJ |
3860 | |
3861 | for (val = base; val; val = val->scc_next) | |
3862 | { | |
b86aedb0 | 3863 | time = time + val->local_time_benefit + val->prop_time_benefit; |
a6a0db7d | 3864 | size = size + val->local_size_cost + val->prop_size_cost; |
310bc633 MJ |
3865 | } |
3866 | ||
3867 | for (val = base; val; val = val->scc_next) | |
a6a0db7d MJ |
3868 | { |
3869 | processed_srcvals.empty (); | |
3870 | for (src = val->sources; src; src = src->next) | |
3871 | if (src->val | |
3872 | && src->cs->maybe_hot_p ()) | |
3873 | { | |
3874 | if (!processed_srcvals.add (src->val)) | |
3875 | { | |
3876 | HOST_WIDE_INT prop_size = size + src->val->prop_size_cost; | |
3877 | if (prop_size < INT_MAX) | |
3878 | src->val->prop_size_cost = prop_size; | |
3879 | else | |
3880 | continue; | |
3881 | } | |
3882 | src->val->prop_time_benefit | |
3883 | += time * src->cs->sreal_frequency (); | |
3884 | } | |
3885 | ||
3886 | if (size < INT_MAX) | |
310bc633 | 3887 | { |
a6a0db7d MJ |
3888 | val->prop_time_benefit = time; |
3889 | val->prop_size_cost = size; | |
310bc633 | 3890 | } |
a6a0db7d MJ |
3891 | else |
3892 | { | |
3893 | val->prop_time_benefit = 0; | |
3894 | val->prop_size_cost = 0; | |
3895 | } | |
3896 | } | |
518dc859 RL |
3897 | } |
3898 | } | |
3899 | ||
310bc633 | 3900 | |
44210a96 MJ |
3901 | /* Propagate constants, polymorphic contexts and their effects from the |
3902 | summaries interprocedurally. */ | |
310bc633 | 3903 | |
518dc859 | 3904 | static void |
99b1c316 | 3905 | ipcp_propagate_stage (class ipa_topo_info *topo) |
518dc859 RL |
3906 | { |
3907 | struct cgraph_node *node; | |
518dc859 | 3908 | |
310bc633 MJ |
3909 | if (dump_file) |
3910 | fprintf (dump_file, "\n Propagating constants:\n\n"); | |
3911 | ||
e7a74006 JH |
3912 | max_count = profile_count::uninitialized (); |
3913 | ||
310bc633 MJ |
3914 | FOR_EACH_DEFINED_FUNCTION (node) |
3915 | { | |
e72763e2 JH |
3916 | if (node->has_gimple_body_p () |
3917 | && opt_for_fn (node->decl, flag_ipa_cp) | |
3918 | && opt_for_fn (node->decl, optimize)) | |
310bc633 | 3919 | { |
6cf67b62 JH |
3920 | class ipa_node_params *info = IPA_NODE_REF (node); |
3921 | determine_versionability (node, info); | |
4ba9fb0a AH |
3922 | |
3923 | unsigned nlattices = ipa_get_param_count (info); | |
3924 | void *chunk = XCNEWVEC (class ipcp_param_lattices, nlattices); | |
3925 | info->lattices = new (chunk) ipcp_param_lattices[nlattices]; | |
310bc633 MJ |
3926 | initialize_node_lattices (node); |
3927 | } | |
f658ad30 | 3928 | ipa_size_summary *s = ipa_size_summaries->get (node); |
56f62793 ML |
3929 | if (node->definition && !node->alias && s != NULL) |
3930 | overall_size += s->self_size; | |
1bad9c18 | 3931 | max_count = max_count.max (node->count.ipa ()); |
310bc633 MJ |
3932 | } |
3933 | ||
f7725a48 | 3934 | orig_overall_size = overall_size; |
310bc633 MJ |
3935 | |
3936 | if (dump_file) | |
f7725a48 | 3937 | fprintf (dump_file, "\noverall_size: %li\n", overall_size); |
310bc633 MJ |
3938 | |
3939 | propagate_constants_topo (topo); | |
b2b29377 MM |
3940 | if (flag_checking) |
3941 | ipcp_verify_propagated_values (); | |
c0cb5055 | 3942 | topo->constants.propagate_effects (); |
44210a96 | 3943 | topo->contexts.propagate_effects (); |
310bc633 MJ |
3944 | |
3945 | if (dump_file) | |
3946 | { | |
3947 | fprintf (dump_file, "\nIPA lattices after all propagation:\n"); | |
3948 | print_all_lattices (dump_file, (dump_flags & TDF_DETAILS), true); | |
3949 | } | |
3950 | } | |
3951 | ||
3952 | /* Discover newly direct outgoing edges from NODE which is a new clone with | |
44210a96 | 3953 | known KNOWN_CSTS and make them direct. */ |
310bc633 MJ |
3954 | |
3955 | static void | |
3956 | ipcp_discover_new_direct_edges (struct cgraph_node *node, | |
44210a96 MJ |
3957 | vec<tree> known_csts, |
3958 | vec<ipa_polymorphic_call_context> | |
3959 | known_contexts, | |
162712de | 3960 | struct ipa_agg_replacement_value *aggvals) |
310bc633 MJ |
3961 | { |
3962 | struct cgraph_edge *ie, *next_ie; | |
0f378cb5 | 3963 | bool found = false; |
310bc633 MJ |
3964 | |
3965 | for (ie = node->indirect_calls; ie; ie = next_ie) | |
3966 | { | |
81fa35bd | 3967 | tree target; |
231b4916 | 3968 | bool speculative; |
310bc633 MJ |
3969 | |
3970 | next_ie = ie->next_callee; | |
44210a96 | 3971 | target = ipa_get_indirect_edge_target_1 (ie, known_csts, known_contexts, |
231b4916 | 3972 | vNULL, aggvals, &speculative); |
310bc633 | 3973 | if (target) |
0f378cb5 | 3974 | { |
042ae7d2 JH |
3975 | bool agg_contents = ie->indirect_info->agg_contents; |
3976 | bool polymorphic = ie->indirect_info->polymorphic; | |
a4e33812 | 3977 | int param_index = ie->indirect_info->param_index; |
231b4916 JH |
3978 | struct cgraph_edge *cs = ipa_make_edge_direct_to_target (ie, target, |
3979 | speculative); | |
0f378cb5 | 3980 | found = true; |
4502fe8d | 3981 | |
042ae7d2 | 3982 | if (cs && !agg_contents && !polymorphic) |
4502fe8d | 3983 | { |
99b1c316 | 3984 | class ipa_node_params *info = IPA_NODE_REF (node); |
4502fe8d MJ |
3985 | int c = ipa_get_controlled_uses (info, param_index); |
3986 | if (c != IPA_UNDESCRIBED_USE) | |
3987 | { | |
3988 | struct ipa_ref *to_del; | |
3989 | ||
3990 | c--; | |
3991 | ipa_set_controlled_uses (info, param_index, c); | |
3992 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3993 | fprintf (dump_file, " controlled uses count of param " | |
3994 | "%i bumped down to %i\n", param_index, c); | |
3995 | if (c == 0 | |
d122681a | 3996 | && (to_del = node->find_reference (cs->callee, NULL, 0))) |
4502fe8d MJ |
3997 | { |
3998 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3999 | fprintf (dump_file, " and even removing its " | |
4000 | "cloning-created reference\n"); | |
d122681a | 4001 | to_del->remove_reference (); |
4502fe8d MJ |
4002 | } |
4003 | } | |
4004 | } | |
0f378cb5 | 4005 | } |
310bc633 | 4006 | } |
0f378cb5 JH |
4007 | /* Turning calls to direct calls will improve overall summary. */ |
4008 | if (found) | |
0bceb671 | 4009 | ipa_update_overall_fn_summary (node); |
310bc633 MJ |
4010 | } |
4011 | ||
1ac2bdb4 ML |
4012 | class edge_clone_summary; |
4013 | static call_summary <edge_clone_summary *> *edge_clone_summaries = NULL; | |
310bc633 | 4014 | |
1ac2bdb4 | 4015 | /* Edge clone summary. */ |
310bc633 | 4016 | |
6c1dae73 | 4017 | class edge_clone_summary |
310bc633 | 4018 | { |
6c1dae73 | 4019 | public: |
1ac2bdb4 ML |
4020 | /* Default constructor. */ |
4021 | edge_clone_summary (): prev_clone (NULL), next_clone (NULL) {} | |
aef83682 | 4022 | |
1ac2bdb4 ML |
4023 | /* Default destructor. */ |
4024 | ~edge_clone_summary () | |
4025 | { | |
4026 | if (prev_clone) | |
4027 | edge_clone_summaries->get (prev_clone)->next_clone = next_clone; | |
4028 | if (next_clone) | |
4029 | edge_clone_summaries->get (next_clone)->prev_clone = prev_clone; | |
4030 | } | |
310bc633 | 4031 | |
1ac2bdb4 ML |
4032 | cgraph_edge *prev_clone; |
4033 | cgraph_edge *next_clone; | |
4034 | }; | |
aef83682 | 4035 | |
1ac2bdb4 ML |
4036 | class edge_clone_summary_t: |
4037 | public call_summary <edge_clone_summary *> | |
aef83682 | 4038 | { |
1ac2bdb4 ML |
4039 | public: |
4040 | edge_clone_summary_t (symbol_table *symtab): | |
4041 | call_summary <edge_clone_summary *> (symtab) | |
4042 | { | |
4043 | m_initialize_when_cloning = true; | |
4044 | } | |
aef83682 | 4045 | |
1ac2bdb4 ML |
4046 | virtual void duplicate (cgraph_edge *src_edge, cgraph_edge *dst_edge, |
4047 | edge_clone_summary *src_data, | |
4048 | edge_clone_summary *dst_data); | |
4049 | }; | |
4050 | ||
4051 | /* Edge duplication hook. */ | |
4052 | ||
4053 | void | |
4054 | edge_clone_summary_t::duplicate (cgraph_edge *src_edge, cgraph_edge *dst_edge, | |
4055 | edge_clone_summary *src_data, | |
4056 | edge_clone_summary *dst_data) | |
4057 | { | |
4058 | if (src_data->next_clone) | |
4059 | edge_clone_summaries->get (src_data->next_clone)->prev_clone = dst_edge; | |
4060 | dst_data->prev_clone = src_edge; | |
4061 | dst_data->next_clone = src_data->next_clone; | |
4062 | src_data->next_clone = dst_edge; | |
aef83682 MJ |
4063 | } |
4064 | ||
cfeef9ac MJ |
4065 | /* Return true is CS calls DEST or its clone for all contexts. When |
4066 | ALLOW_RECURSION_TO_CLONE is false, also return false for self-recursive | |
4067 | edges from/to an all-context clone. */ | |
310bc633 MJ |
4068 | |
4069 | static bool | |
cfeef9ac MJ |
4070 | calls_same_node_or_its_all_contexts_clone_p (cgraph_edge *cs, cgraph_node *dest, |
4071 | bool allow_recursion_to_clone) | |
47f4756e | 4072 | { |
cfeef9ac MJ |
4073 | enum availability availability; |
4074 | cgraph_node *callee = cs->callee->function_symbol (&availability); | |
4075 | ||
4076 | if (availability <= AVAIL_INTERPOSABLE) | |
4077 | return false; | |
4078 | if (callee == dest) | |
47f4756e | 4079 | return true; |
cfeef9ac MJ |
4080 | if (!allow_recursion_to_clone && cs->caller == callee) |
4081 | return false; | |
47f4756e | 4082 | |
cfeef9ac | 4083 | class ipa_node_params *info = IPA_NODE_REF (callee); |
47f4756e MJ |
4084 | return info->is_all_contexts_clone && info->ipcp_orig_node == dest; |
4085 | } | |
4086 | ||
7b668576 MJ |
4087 | /* Return true if edge CS does bring about the value described by SRC to |
4088 | DEST_VAL of node DEST or its clone for all contexts. */ | |
47f4756e MJ |
4089 | |
4090 | static bool | |
4091 | cgraph_edge_brings_value_p (cgraph_edge *cs, ipcp_value_source<tree> *src, | |
7b668576 | 4092 | cgraph_node *dest, ipcp_value<tree> *dest_val) |
310bc633 | 4093 | { |
99b1c316 | 4094 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
310bc633 | 4095 | |
cfeef9ac | 4096 | if (!calls_same_node_or_its_all_contexts_clone_p (cs, dest, !src->val) |
310bc633 MJ |
4097 | || caller_info->node_dead) |
4098 | return false; | |
2f1f3ac4 MJ |
4099 | |
4100 | if (!src->val) | |
310bc633 MJ |
4101 | return true; |
4102 | ||
4103 | if (caller_info->ipcp_orig_node) | |
4104 | { | |
2c9561b5 MJ |
4105 | tree t; |
4106 | if (src->offset == -1) | |
44210a96 | 4107 | t = caller_info->known_csts[src->index]; |
2c9561b5 MJ |
4108 | else |
4109 | t = get_clone_agg_value (cs->caller, src->offset, src->index); | |
310bc633 MJ |
4110 | return (t != NULL_TREE |
4111 | && values_equal_for_ipcp_p (src->val->value, t)); | |
4112 | } | |
4113 | else | |
518dc859 | 4114 | { |
2f1f3ac4 MJ |
4115 | if (src->val == dest_val) |
4116 | return true; | |
4117 | ||
2c9561b5 | 4118 | struct ipcp_agg_lattice *aglat; |
99b1c316 | 4119 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (caller_info, |
2c9561b5 MJ |
4120 | src->index); |
4121 | if (src->offset == -1) | |
c0cb5055 | 4122 | return (plats->itself.is_single_const () |
2c9561b5 MJ |
4123 | && values_equal_for_ipcp_p (src->val->value, |
4124 | plats->itself.values->value)); | |
310bc633 | 4125 | else |
2c9561b5 MJ |
4126 | { |
4127 | if (plats->aggs_bottom || plats->aggs_contain_variable) | |
4128 | return false; | |
4129 | for (aglat = plats->aggs; aglat; aglat = aglat->next) | |
4130 | if (aglat->offset == src->offset) | |
c0cb5055 | 4131 | return (aglat->is_single_const () |
2c9561b5 MJ |
4132 | && values_equal_for_ipcp_p (src->val->value, |
4133 | aglat->values->value)); | |
4134 | } | |
4135 | return false; | |
310bc633 MJ |
4136 | } |
4137 | } | |
4138 | ||
7b668576 MJ |
4139 | /* Return true if edge CS does bring about the value described by SRC to |
4140 | DST_VAL of node DEST or its clone for all contexts. */ | |
44210a96 MJ |
4141 | |
4142 | static bool | |
47f4756e MJ |
4143 | cgraph_edge_brings_value_p (cgraph_edge *cs, |
4144 | ipcp_value_source<ipa_polymorphic_call_context> *src, | |
7b668576 MJ |
4145 | cgraph_node *dest, |
4146 | ipcp_value<ipa_polymorphic_call_context> *) | |
44210a96 | 4147 | { |
99b1c316 | 4148 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
44210a96 | 4149 | |
cfeef9ac | 4150 | if (!calls_same_node_or_its_all_contexts_clone_p (cs, dest, true) |
44210a96 MJ |
4151 | || caller_info->node_dead) |
4152 | return false; | |
4153 | if (!src->val) | |
4154 | return true; | |
4155 | ||
4156 | if (caller_info->ipcp_orig_node) | |
4157 | return (caller_info->known_contexts.length () > (unsigned) src->index) | |
4158 | && values_equal_for_ipcp_p (src->val->value, | |
4159 | caller_info->known_contexts[src->index]); | |
4160 | ||
99b1c316 | 4161 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (caller_info, |
44210a96 MJ |
4162 | src->index); |
4163 | return plats->ctxlat.is_single_const () | |
4164 | && values_equal_for_ipcp_p (src->val->value, | |
4165 | plats->ctxlat.values->value); | |
4166 | } | |
4167 | ||
2c9561b5 MJ |
4168 | /* Get the next clone in the linked list of clones of an edge. */ |
4169 | ||
4170 | static inline struct cgraph_edge * | |
4171 | get_next_cgraph_edge_clone (struct cgraph_edge *cs) | |
4172 | { | |
1ac2bdb4 ML |
4173 | edge_clone_summary *s = edge_clone_summaries->get (cs); |
4174 | return s != NULL ? s->next_clone : NULL; | |
2c9561b5 MJ |
4175 | } |
4176 | ||
7b668576 MJ |
4177 | /* Given VAL that is intended for DEST, iterate over all its sources and if any |
4178 | of them is viable and hot, return true. In that case, for those that still | |
4179 | hold, add their edge frequency and their number into *FREQUENCY and | |
4180 | *CALLER_COUNT respectively. */ | |
310bc633 | 4181 | |
c0cb5055 | 4182 | template <typename valtype> |
310bc633 | 4183 | static bool |
47f4756e | 4184 | get_info_about_necessary_edges (ipcp_value<valtype> *val, cgraph_node *dest, |
b86aedb0 MJ |
4185 | sreal *freq_sum, profile_count *count_sum, |
4186 | int *caller_count) | |
310bc633 | 4187 | { |
c0cb5055 | 4188 | ipcp_value_source<valtype> *src; |
b86aedb0 MJ |
4189 | sreal freq = 0; |
4190 | int count = 0; | |
3995f3a2 | 4191 | profile_count cnt = profile_count::zero (); |
310bc633 | 4192 | bool hot = false; |
7b668576 | 4193 | bool non_self_recursive = false; |
310bc633 MJ |
4194 | |
4195 | for (src = val->sources; src; src = src->next) | |
4196 | { | |
4197 | struct cgraph_edge *cs = src->cs; | |
4198 | while (cs) | |
518dc859 | 4199 | { |
7b668576 | 4200 | if (cgraph_edge_brings_value_p (cs, src, dest, val)) |
310bc633 MJ |
4201 | { |
4202 | count++; | |
b86aedb0 | 4203 | freq += cs->sreal_frequency (); |
1bad9c18 JH |
4204 | if (cs->count.ipa ().initialized_p ()) |
4205 | cnt += cs->count.ipa (); | |
3dafb85c | 4206 | hot |= cs->maybe_hot_p (); |
7b668576 MJ |
4207 | if (cs->caller != dest) |
4208 | non_self_recursive = true; | |
310bc633 MJ |
4209 | } |
4210 | cs = get_next_cgraph_edge_clone (cs); | |
518dc859 RL |
4211 | } |
4212 | } | |
310bc633 | 4213 | |
7b668576 MJ |
4214 | /* If the only edges bringing a value are self-recursive ones, do not bother |
4215 | evaluating it. */ | |
4216 | if (!non_self_recursive) | |
4217 | return false; | |
4218 | ||
310bc633 MJ |
4219 | *freq_sum = freq; |
4220 | *count_sum = cnt; | |
4221 | *caller_count = count; | |
9b14fc33 FX |
4222 | |
4223 | if (!hot && IPA_NODE_REF (dest)->node_within_scc) | |
4224 | { | |
4225 | struct cgraph_edge *cs; | |
4226 | ||
4227 | /* Cold non-SCC source edge could trigger hot recursive execution of | |
4228 | function. Consider the case as hot and rely on following cost model | |
4229 | computation to further select right one. */ | |
4230 | for (cs = dest->callers; cs; cs = cs->next_caller) | |
4231 | if (cs->caller == dest && cs->maybe_hot_p ()) | |
4232 | return true; | |
4233 | } | |
4234 | ||
310bc633 | 4235 | return hot; |
518dc859 RL |
4236 | } |
4237 | ||
a0f6a8cb FX |
4238 | /* Given a NODE, and a set of its CALLERS, try to adjust order of the callers |
4239 | to let a non-self-recursive caller be the first element. Thus, we can | |
4240 | simplify intersecting operations on values that arrive from all of these | |
4241 | callers, especially when there exists self-recursive call. Return true if | |
4242 | this kind of adjustment is possible. */ | |
4243 | ||
4244 | static bool | |
4245 | adjust_callers_for_value_intersection (vec<cgraph_edge *> callers, | |
4246 | cgraph_node *node) | |
4247 | { | |
4248 | for (unsigned i = 0; i < callers.length (); i++) | |
4249 | { | |
4250 | cgraph_edge *cs = callers[i]; | |
4251 | ||
4252 | if (cs->caller != node) | |
4253 | { | |
4254 | if (i > 0) | |
4255 | { | |
4256 | callers[i] = callers[0]; | |
4257 | callers[0] = cs; | |
4258 | } | |
4259 | return true; | |
4260 | } | |
4261 | } | |
4262 | return false; | |
4263 | } | |
4264 | ||
47f4756e MJ |
4265 | /* Return a vector of incoming edges that do bring value VAL to node DEST. It |
4266 | is assumed their number is known and equal to CALLER_COUNT. */ | |
310bc633 | 4267 | |
c0cb5055 | 4268 | template <typename valtype> |
d52f5295 | 4269 | static vec<cgraph_edge *> |
47f4756e MJ |
4270 | gather_edges_for_value (ipcp_value<valtype> *val, cgraph_node *dest, |
4271 | int caller_count) | |
518dc859 | 4272 | { |
c0cb5055 | 4273 | ipcp_value_source<valtype> *src; |
d52f5295 | 4274 | vec<cgraph_edge *> ret; |
310bc633 | 4275 | |
9771b263 | 4276 | ret.create (caller_count); |
310bc633 MJ |
4277 | for (src = val->sources; src; src = src->next) |
4278 | { | |
4279 | struct cgraph_edge *cs = src->cs; | |
4280 | while (cs) | |
4281 | { | |
7b668576 | 4282 | if (cgraph_edge_brings_value_p (cs, src, dest, val)) |
9771b263 | 4283 | ret.quick_push (cs); |
310bc633 MJ |
4284 | cs = get_next_cgraph_edge_clone (cs); |
4285 | } | |
4286 | } | |
4287 | ||
a0f6a8cb FX |
4288 | if (caller_count > 1) |
4289 | adjust_callers_for_value_intersection (ret, dest); | |
4290 | ||
310bc633 | 4291 | return ret; |
518dc859 RL |
4292 | } |
4293 | ||
310bc633 MJ |
4294 | /* Construct a replacement map for a know VALUE for a formal parameter PARAM. |
4295 | Return it or NULL if for some reason it cannot be created. */ | |
4296 | ||
518dc859 | 4297 | static struct ipa_replace_map * |
99b1c316 | 4298 | get_replacement_map (class ipa_node_params *info, tree value, int parm_num) |
518dc859 RL |
4299 | { |
4300 | struct ipa_replace_map *replace_map; | |
518dc859 | 4301 | |
766090c2 | 4302 | replace_map = ggc_alloc<ipa_replace_map> (); |
c6f7cfc1 JH |
4303 | if (dump_file) |
4304 | { | |
0e8853ee JH |
4305 | fprintf (dump_file, " replacing "); |
4306 | ipa_dump_param (dump_file, info, parm_num); | |
155c9907 | 4307 | |
c6f7cfc1 | 4308 | fprintf (dump_file, " with const "); |
ef6cb4c7 | 4309 | print_generic_expr (dump_file, value); |
c6f7cfc1 JH |
4310 | fprintf (dump_file, "\n"); |
4311 | } | |
49bde175 | 4312 | replace_map->parm_num = parm_num; |
310bc633 | 4313 | replace_map->new_tree = value; |
518dc859 RL |
4314 | return replace_map; |
4315 | } | |
4316 | ||
310bc633 | 4317 | /* Dump new profiling counts */ |
518dc859 | 4318 | |
518dc859 | 4319 | static void |
310bc633 MJ |
4320 | dump_profile_updates (struct cgraph_node *orig_node, |
4321 | struct cgraph_node *new_node) | |
518dc859 | 4322 | { |
310bc633 | 4323 | struct cgraph_edge *cs; |
518dc859 | 4324 | |
3995f3a2 JH |
4325 | fprintf (dump_file, " setting count of the specialized node to "); |
4326 | new_node->count.dump (dump_file); | |
4327 | fprintf (dump_file, "\n"); | |
155c9907 | 4328 | for (cs = new_node->callees; cs; cs = cs->next_callee) |
3995f3a2 JH |
4329 | { |
4330 | fprintf (dump_file, " edge to %s has count ", | |
3629ff8a | 4331 | cs->callee->dump_name ()); |
3995f3a2 JH |
4332 | cs->count.dump (dump_file); |
4333 | fprintf (dump_file, "\n"); | |
4334 | } | |
310bc633 | 4335 | |
3995f3a2 JH |
4336 | fprintf (dump_file, " setting count of the original node to "); |
4337 | orig_node->count.dump (dump_file); | |
4338 | fprintf (dump_file, "\n"); | |
155c9907 | 4339 | for (cs = orig_node->callees; cs; cs = cs->next_callee) |
3995f3a2 JH |
4340 | { |
4341 | fprintf (dump_file, " edge to %s is left with ", | |
3629ff8a | 4342 | cs->callee->dump_name ()); |
3995f3a2 JH |
4343 | cs->count.dump (dump_file); |
4344 | fprintf (dump_file, "\n"); | |
4345 | } | |
310bc633 | 4346 | } |
c6f7cfc1 | 4347 | |
310bc633 MJ |
4348 | /* After a specialized NEW_NODE version of ORIG_NODE has been created, update |
4349 | their profile information to reflect this. */ | |
518dc859 | 4350 | |
518dc859 | 4351 | static void |
310bc633 MJ |
4352 | update_profiling_info (struct cgraph_node *orig_node, |
4353 | struct cgraph_node *new_node) | |
518dc859 | 4354 | { |
518dc859 | 4355 | struct cgraph_edge *cs; |
310bc633 | 4356 | struct caller_statistics stats; |
3995f3a2 JH |
4357 | profile_count new_sum, orig_sum; |
4358 | profile_count remainder, orig_node_count = orig_node->count; | |
2e7fd867 | 4359 | profile_count orig_new_node_count = new_node->count; |
310bc633 | 4360 | |
1bad9c18 | 4361 | if (!(orig_node_count.ipa () > profile_count::zero ())) |
310bc633 | 4362 | return; |
518dc859 | 4363 | |
310bc633 | 4364 | init_caller_stats (&stats); |
d52f5295 ML |
4365 | orig_node->call_for_symbol_thunks_and_aliases (gather_caller_stats, &stats, |
4366 | false); | |
310bc633 MJ |
4367 | orig_sum = stats.count_sum; |
4368 | init_caller_stats (&stats); | |
d52f5295 ML |
4369 | new_node->call_for_symbol_thunks_and_aliases (gather_caller_stats, &stats, |
4370 | false); | |
310bc633 MJ |
4371 | new_sum = stats.count_sum; |
4372 | ||
4373 | if (orig_node_count < orig_sum + new_sum) | |
518dc859 | 4374 | { |
310bc633 | 4375 | if (dump_file) |
3995f3a2 JH |
4376 | { |
4377 | fprintf (dump_file, " Problem: node %s has too low count ", | |
4378 | orig_node->dump_name ()); | |
4379 | orig_node_count.dump (dump_file); | |
4380 | fprintf (dump_file, "while the sum of incoming count is "); | |
4381 | (orig_sum + new_sum).dump (dump_file); | |
4382 | fprintf (dump_file, "\n"); | |
4383 | } | |
4384 | ||
4385 | orig_node_count = (orig_sum + new_sum).apply_scale (12, 10); | |
310bc633 | 4386 | if (dump_file) |
3995f3a2 JH |
4387 | { |
4388 | fprintf (dump_file, " proceeding by pretending it was "); | |
4389 | orig_node_count.dump (dump_file); | |
4390 | fprintf (dump_file, "\n"); | |
4391 | } | |
518dc859 | 4392 | } |
310bc633 | 4393 | |
517048ce JH |
4394 | remainder = orig_node_count.combine_with_ipa_count (orig_node_count.ipa () |
4395 | - new_sum.ipa ()); | |
34fbe3f0 JH |
4396 | |
4397 | /* With partial train run we do not want to assume that original's | |
4398 | count is zero whenever we redurect all executed edges to clone. | |
4399 | Simply drop profile to local one in this case. */ | |
4400 | if (remainder.ipa_p () && !remainder.ipa ().nonzero_p () | |
4401 | && orig_node->count.ipa_p () && orig_node->count.ipa ().nonzero_p () | |
4402 | && flag_profile_partial_training) | |
4403 | remainder = remainder.guessed_local (); | |
4404 | ||
517048ce | 4405 | new_sum = orig_node_count.combine_with_ipa_count (new_sum); |
2e7fd867 | 4406 | new_node->count = new_sum; |
310bc633 MJ |
4407 | orig_node->count = remainder; |
4408 | ||
2e7fd867 | 4409 | profile_count::adjust_for_ipa_scaling (&new_sum, &orig_new_node_count); |
155c9907 | 4410 | for (cs = new_node->callees; cs; cs = cs->next_callee) |
2e7fd867 JH |
4411 | cs->count = cs->count.apply_scale (new_sum, orig_new_node_count); |
4412 | for (cs = new_node->indirect_calls; cs; cs = cs->next_callee) | |
4413 | cs->count = cs->count.apply_scale (new_sum, orig_new_node_count); | |
310bc633 | 4414 | |
5a686851 | 4415 | profile_count::adjust_for_ipa_scaling (&remainder, &orig_node_count); |
155c9907 | 4416 | for (cs = orig_node->callees; cs; cs = cs->next_callee) |
3995f3a2 | 4417 | cs->count = cs->count.apply_scale (remainder, orig_node_count); |
2e7fd867 JH |
4418 | for (cs = orig_node->indirect_calls; cs; cs = cs->next_callee) |
4419 | cs->count = cs->count.apply_scale (remainder, orig_node_count); | |
310bc633 MJ |
4420 | |
4421 | if (dump_file) | |
4422 | dump_profile_updates (orig_node, new_node); | |
518dc859 RL |
4423 | } |
4424 | ||
310bc633 MJ |
4425 | /* Update the respective profile of specialized NEW_NODE and the original |
4426 | ORIG_NODE after additional edges with cumulative count sum REDIRECTED_SUM | |
4427 | have been redirected to the specialized version. */ | |
4428 | ||
4429 | static void | |
4430 | update_specialized_profile (struct cgraph_node *new_node, | |
4431 | struct cgraph_node *orig_node, | |
3995f3a2 | 4432 | profile_count redirected_sum) |
5e45130d | 4433 | { |
a065d52e | 4434 | struct cgraph_edge *cs; |
3995f3a2 | 4435 | profile_count new_node_count, orig_node_count = orig_node->count; |
5e45130d | 4436 | |
310bc633 | 4437 | if (dump_file) |
3995f3a2 JH |
4438 | { |
4439 | fprintf (dump_file, " the sum of counts of redirected edges is "); | |
4440 | redirected_sum.dump (dump_file); | |
4441 | fprintf (dump_file, "\n"); | |
4442 | } | |
4443 | if (!(orig_node_count > profile_count::zero ())) | |
310bc633 | 4444 | return; |
a065d52e | 4445 | |
310bc633 | 4446 | gcc_assert (orig_node_count >= redirected_sum); |
5e45130d | 4447 | |
310bc633 MJ |
4448 | new_node_count = new_node->count; |
4449 | new_node->count += redirected_sum; | |
4450 | orig_node->count -= redirected_sum; | |
a065d52e | 4451 | |
155c9907 | 4452 | for (cs = new_node->callees; cs; cs = cs->next_callee) |
e3951b03 | 4453 | cs->count += cs->count.apply_scale (redirected_sum, new_node_count); |
a065d52e | 4454 | |
155c9907 | 4455 | for (cs = orig_node->callees; cs; cs = cs->next_callee) |
310bc633 | 4456 | { |
3995f3a2 JH |
4457 | profile_count dec = cs->count.apply_scale (redirected_sum, |
4458 | orig_node_count); | |
4459 | cs->count -= dec; | |
310bc633 | 4460 | } |
a065d52e | 4461 | |
310bc633 MJ |
4462 | if (dump_file) |
4463 | dump_profile_updates (orig_node, new_node); | |
5e45130d JH |
4464 | } |
4465 | ||
ff6686d2 MJ |
4466 | /* Return true if we would like to remove a parameter from NODE when cloning it |
4467 | with KNOWN_CSTS scalar constants. */ | |
4468 | ||
4469 | static bool | |
4470 | want_remove_some_param_p (cgraph_node *node, vec<tree> known_csts) | |
4471 | { | |
4472 | auto_vec<bool, 16> surviving; | |
4473 | bool filled_vec = false; | |
4474 | ipa_node_params *info = IPA_NODE_REF (node); | |
4475 | int i, count = ipa_get_param_count (info); | |
4476 | ||
4477 | for (i = 0; i < count; i++) | |
4478 | { | |
4479 | if (!known_csts[i] && ipa_is_param_used (info, i)) | |
4480 | continue; | |
4481 | ||
4482 | if (!filled_vec) | |
4483 | { | |
ae7a23a3 JH |
4484 | clone_info *info = clone_info::get (node); |
4485 | if (!info || !info->param_adjustments) | |
ff6686d2 | 4486 | return true; |
ae7a23a3 | 4487 | info->param_adjustments->get_surviving_params (&surviving); |
ff6686d2 MJ |
4488 | filled_vec = true; |
4489 | } | |
4490 | if (surviving.length() < (unsigned) i && surviving[i]) | |
4491 | return true; | |
4492 | } | |
4493 | return false; | |
4494 | } | |
4495 | ||
44210a96 MJ |
4496 | /* Create a specialized version of NODE with known constants in KNOWN_CSTS, |
4497 | known contexts in KNOWN_CONTEXTS and known aggregate values in AGGVALS and | |
4498 | redirect all edges in CALLERS to it. */ | |
a065d52e | 4499 | |
310bc633 MJ |
4500 | static struct cgraph_node * |
4501 | create_specialized_node (struct cgraph_node *node, | |
44210a96 MJ |
4502 | vec<tree> known_csts, |
4503 | vec<ipa_polymorphic_call_context> known_contexts, | |
2c9561b5 | 4504 | struct ipa_agg_replacement_value *aggvals, |
d52f5295 | 4505 | vec<cgraph_edge *> callers) |
5e45130d | 4506 | { |
99b1c316 | 4507 | class ipa_node_params *new_info, *info = IPA_NODE_REF (node); |
d52f5295 | 4508 | vec<ipa_replace_map *, va_gc> *replace_trees = NULL; |
ff6686d2 | 4509 | vec<ipa_adjusted_param, va_gc> *new_params = NULL; |
79ee9826 | 4510 | struct ipa_agg_replacement_value *av; |
310bc633 MJ |
4511 | struct cgraph_node *new_node; |
4512 | int i, count = ipa_get_param_count (info); | |
ae7a23a3 JH |
4513 | clone_info *cinfo = clone_info::get (node); |
4514 | ipa_param_adjustments *old_adjustments = cinfo | |
4515 | ? cinfo->param_adjustments : NULL; | |
ff6686d2 | 4516 | ipa_param_adjustments *new_adjustments; |
310bc633 | 4517 | gcc_assert (!info->ipcp_orig_node); |
87f94429 | 4518 | gcc_assert (node->can_change_signature |
ff6686d2 MJ |
4519 | || !old_adjustments); |
4520 | ||
4521 | if (old_adjustments) | |
4522 | { | |
4523 | /* At the moment all IPA optimizations should use the number of | |
4524 | parameters of the prevailing decl as the m_always_copy_start. | |
4525 | Handling any other value would complicate the code below, so for the | |
4526 | time bing let's only assert it is so. */ | |
4527 | gcc_assert (old_adjustments->m_always_copy_start == count | |
4528 | || old_adjustments->m_always_copy_start < 0); | |
4529 | int old_adj_count = vec_safe_length (old_adjustments->m_adj_params); | |
4530 | for (i = 0; i < old_adj_count; i++) | |
310bc633 | 4531 | { |
ff6686d2 | 4532 | ipa_adjusted_param *old_adj = &(*old_adjustments->m_adj_params)[i]; |
87f94429 | 4533 | if (!node->can_change_signature |
ff6686d2 MJ |
4534 | || old_adj->op != IPA_PARAM_OP_COPY |
4535 | || (!known_csts[old_adj->base_index] | |
4536 | && ipa_is_param_used (info, old_adj->base_index))) | |
4537 | { | |
4538 | ipa_adjusted_param new_adj = *old_adj; | |
310bc633 | 4539 | |
ff6686d2 MJ |
4540 | new_adj.prev_clone_adjustment = true; |
4541 | new_adj.prev_clone_index = i; | |
4542 | vec_safe_push (new_params, new_adj); | |
4543 | } | |
310bc633 | 4544 | } |
ff6686d2 MJ |
4545 | bool skip_return = old_adjustments->m_skip_return; |
4546 | new_adjustments = (new (ggc_alloc <ipa_param_adjustments> ()) | |
4547 | ipa_param_adjustments (new_params, count, | |
4548 | skip_return)); | |
310bc633 | 4549 | } |
87f94429 | 4550 | else if (node->can_change_signature |
ff6686d2 | 4551 | && want_remove_some_param_p (node, known_csts)) |
d7da5cc8 | 4552 | { |
ff6686d2 MJ |
4553 | ipa_adjusted_param adj; |
4554 | memset (&adj, 0, sizeof (adj)); | |
4555 | adj.op = IPA_PARAM_OP_COPY; | |
4556 | for (i = 0; i < count; i++) | |
4557 | if (!known_csts[i] && ipa_is_param_used (info, i)) | |
4558 | { | |
4559 | adj.base_index = i; | |
4560 | adj.prev_clone_index = i; | |
4561 | vec_safe_push (new_params, adj); | |
4562 | } | |
4563 | new_adjustments = (new (ggc_alloc <ipa_param_adjustments> ()) | |
4564 | ipa_param_adjustments (new_params, count, false)); | |
d7da5cc8 | 4565 | } |
ff6686d2 MJ |
4566 | else |
4567 | new_adjustments = NULL; | |
310bc633 | 4568 | |
ae7a23a3 | 4569 | replace_trees = cinfo ? vec_safe_copy (cinfo->tree_map) : NULL; |
155c9907 | 4570 | for (i = 0; i < count; i++) |
310bc633 | 4571 | { |
44210a96 MJ |
4572 | tree t = known_csts[i]; |
4573 | if (t) | |
310bc633 MJ |
4574 | { |
4575 | struct ipa_replace_map *replace_map; | |
4576 | ||
44210a96 | 4577 | gcc_checking_assert (TREE_CODE (t) != TREE_BINFO); |
0e8853ee | 4578 | replace_map = get_replacement_map (info, t, i); |
310bc633 | 4579 | if (replace_map) |
9771b263 | 4580 | vec_safe_push (replace_trees, replace_map); |
310bc633 | 4581 | } |
5e45130d | 4582 | } |
7b668576 MJ |
4583 | auto_vec<cgraph_edge *, 2> self_recursive_calls; |
4584 | for (i = callers.length () - 1; i >= 0; i--) | |
4585 | { | |
4586 | cgraph_edge *cs = callers[i]; | |
4587 | if (cs->caller == node) | |
4588 | { | |
4589 | self_recursive_calls.safe_push (cs); | |
4590 | callers.unordered_remove (i); | |
4591 | } | |
4592 | } | |
5e45130d | 4593 | |
9e0b0ec3 MP |
4594 | unsigned &suffix_counter = clone_num_suffixes->get_or_insert ( |
4595 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME ( | |
4596 | node->decl))); | |
d52f5295 | 4597 | new_node = node->create_virtual_clone (callers, replace_trees, |
ff6686d2 | 4598 | new_adjustments, "constprop", |
53aedcce MP |
4599 | suffix_counter); |
4600 | suffix_counter++; | |
7b668576 | 4601 | |
5bf31c64 | 4602 | bool have_self_recursive_calls = !self_recursive_calls.is_empty (); |
7b668576 MJ |
4603 | for (unsigned j = 0; j < self_recursive_calls.length (); j++) |
4604 | { | |
1ac2bdb4 | 4605 | cgraph_edge *cs = get_next_cgraph_edge_clone (self_recursive_calls[j]); |
5fc1b920 MJ |
4606 | /* Cloned edges can disappear during cloning as speculation can be |
4607 | resolved, check that we have one and that it comes from the last | |
4608 | cloning. */ | |
4609 | if (cs && cs->caller == new_node) | |
4610 | cs->redirect_callee_duplicating_thunks (new_node); | |
4611 | /* Any future code that would make more than one clone of an outgoing | |
4612 | edge would confuse this mechanism, so let's check that does not | |
4613 | happen. */ | |
4614 | gcc_checking_assert (!cs | |
1ac2bdb4 ML |
4615 | || !get_next_cgraph_edge_clone (cs) |
4616 | || get_next_cgraph_edge_clone (cs)->caller != new_node); | |
7b668576 | 4617 | } |
5bf31c64 MJ |
4618 | if (have_self_recursive_calls) |
4619 | new_node->expand_all_artificial_thunks (); | |
7b668576 | 4620 | |
2c9561b5 | 4621 | ipa_set_node_agg_value_chain (new_node, aggvals); |
79ee9826 | 4622 | for (av = aggvals; av; av = av->next) |
2d8d3ae2 | 4623 | new_node->maybe_create_reference (av->value, NULL); |
79ee9826 | 4624 | |
310bc633 | 4625 | if (dump_file && (dump_flags & TDF_DETAILS)) |
2c9561b5 | 4626 | { |
464d0118 | 4627 | fprintf (dump_file, " the new node is %s.\n", new_node->dump_name ()); |
44210a96 MJ |
4628 | if (known_contexts.exists ()) |
4629 | { | |
155c9907 | 4630 | for (i = 0; i < count; i++) |
44210a96 MJ |
4631 | if (!known_contexts[i].useless_p ()) |
4632 | { | |
4633 | fprintf (dump_file, " known ctx %i is ", i); | |
4634 | known_contexts[i].dump (dump_file); | |
4635 | } | |
4636 | } | |
2c9561b5 MJ |
4637 | if (aggvals) |
4638 | ipa_dump_agg_replacement_values (dump_file, aggvals); | |
4639 | } | |
9de6f6c3 | 4640 | ipa_check_create_node_params (); |
310bc633 MJ |
4641 | update_profiling_info (node, new_node); |
4642 | new_info = IPA_NODE_REF (new_node); | |
4643 | new_info->ipcp_orig_node = node; | |
6cf67b62 | 4644 | new_node->ipcp_clone = true; |
44210a96 MJ |
4645 | new_info->known_csts = known_csts; |
4646 | new_info->known_contexts = known_contexts; | |
5e45130d | 4647 | |
44210a96 | 4648 | ipcp_discover_new_direct_edges (new_node, known_csts, known_contexts, aggvals); |
310bc633 | 4649 | |
9771b263 | 4650 | callers.release (); |
310bc633 | 4651 | return new_node; |
5e45130d JH |
4652 | } |
4653 | ||
cfeef9ac MJ |
4654 | /* Return true if JFUNC, which describes a i-th parameter of call CS, is a |
4655 | pass-through function to itself when the cgraph_node involved is not an | |
4656 | IPA-CP clone. When SIMPLE is true, further check if JFUNC is a simple | |
4657 | no-operation pass-through. */ | |
7b668576 MJ |
4658 | |
4659 | static bool | |
a0f6a8cb FX |
4660 | self_recursive_pass_through_p (cgraph_edge *cs, ipa_jump_func *jfunc, int i, |
4661 | bool simple = true) | |
7b668576 MJ |
4662 | { |
4663 | enum availability availability; | |
4664 | if (cs->caller == cs->callee->function_symbol (&availability) | |
4665 | && availability > AVAIL_INTERPOSABLE | |
4666 | && jfunc->type == IPA_JF_PASS_THROUGH | |
a0f6a8cb | 4667 | && (!simple || ipa_get_jf_pass_through_operation (jfunc) == NOP_EXPR) |
cfeef9ac MJ |
4668 | && ipa_get_jf_pass_through_formal_id (jfunc) == i |
4669 | && IPA_NODE_REF (cs->caller) | |
4670 | && !IPA_NODE_REF (cs->caller)->ipcp_orig_node) | |
7b668576 MJ |
4671 | return true; |
4672 | return false; | |
4673 | } | |
4674 | ||
cfeef9ac MJ |
4675 | /* Return true if JFUNC, which describes a part of an aggregate represented or |
4676 | pointed to by the i-th parameter of call CS, is a pass-through function to | |
4677 | itself when the cgraph_node involved is not an IPA-CP clone.. When | |
4678 | SIMPLE is true, further check if JFUNC is a simple no-operation | |
4679 | pass-through. */ | |
951e27f5 FX |
4680 | |
4681 | static bool | |
4682 | self_recursive_agg_pass_through_p (cgraph_edge *cs, ipa_agg_jf_item *jfunc, | |
a0f6a8cb | 4683 | int i, bool simple = true) |
951e27f5 FX |
4684 | { |
4685 | enum availability availability; | |
4686 | if (cs->caller == cs->callee->function_symbol (&availability) | |
4687 | && availability > AVAIL_INTERPOSABLE | |
4688 | && jfunc->jftype == IPA_JF_LOAD_AGG | |
4689 | && jfunc->offset == jfunc->value.load_agg.offset | |
a0f6a8cb FX |
4690 | && (!simple || jfunc->value.pass_through.operation == NOP_EXPR) |
4691 | && jfunc->value.pass_through.formal_id == i | |
cfeef9ac MJ |
4692 | && useless_type_conversion_p (jfunc->value.load_agg.type, jfunc->type) |
4693 | && IPA_NODE_REF (cs->caller) | |
4694 | && !IPA_NODE_REF (cs->caller)->ipcp_orig_node) | |
951e27f5 FX |
4695 | return true; |
4696 | return false; | |
4697 | } | |
4698 | ||
310bc633 | 4699 | /* Given a NODE, and a subset of its CALLERS, try to populate blanks slots in |
44210a96 | 4700 | KNOWN_CSTS with constants that are also known for all of the CALLERS. */ |
3949c4a7 MJ |
4701 | |
4702 | static void | |
2c9561b5 | 4703 | find_more_scalar_values_for_callers_subset (struct cgraph_node *node, |
44210a96 | 4704 | vec<tree> known_csts, |
d52f5295 | 4705 | vec<cgraph_edge *> callers) |
3949c4a7 | 4706 | { |
99b1c316 | 4707 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 | 4708 | int i, count = ipa_get_param_count (info); |
3949c4a7 | 4709 | |
155c9907 | 4710 | for (i = 0; i < count; i++) |
3949c4a7 | 4711 | { |
310bc633 MJ |
4712 | struct cgraph_edge *cs; |
4713 | tree newval = NULL_TREE; | |
4714 | int j; | |
df0d8136 | 4715 | bool first = true; |
e5cf5e11 | 4716 | tree type = ipa_get_type (info, i); |
3949c4a7 | 4717 | |
44210a96 | 4718 | if (ipa_get_scalar_lat (info, i)->bottom || known_csts[i]) |
3949c4a7 MJ |
4719 | continue; |
4720 | ||
9771b263 | 4721 | FOR_EACH_VEC_ELT (callers, j, cs) |
49c471e3 | 4722 | { |
310bc633 MJ |
4723 | struct ipa_jump_func *jump_func; |
4724 | tree t; | |
40591473 | 4725 | |
a33c028e JH |
4726 | if (!IPA_EDGE_REF (cs) |
4727 | || i >= ipa_get_cs_argument_count (IPA_EDGE_REF (cs)) | |
173b7355 | 4728 | || (i == 0 |
67f3791f | 4729 | && call_passes_through_thunk (cs))) |
155c9907 JJ |
4730 | { |
4731 | newval = NULL_TREE; | |
4732 | break; | |
4733 | } | |
310bc633 | 4734 | jump_func = ipa_get_ith_jump_func (IPA_EDGE_REF (cs), i); |
7b668576 | 4735 | |
a0f6a8cb FX |
4736 | /* Besides simple pass-through jump function, arithmetic jump |
4737 | function could also introduce argument-direct-pass-through for | |
4738 | self-feeding recursive call. For example, | |
4739 | ||
4740 | fn (int i) | |
4741 | { | |
4742 | fn (i & 1); | |
4743 | } | |
4744 | ||
4745 | Given that i is 0, recursive propagation via (i & 1) also gets | |
4746 | 0. */ | |
4747 | if (self_recursive_pass_through_p (cs, jump_func, i, false)) | |
4748 | { | |
4749 | gcc_assert (newval); | |
4750 | t = ipa_get_jf_arith_result ( | |
4751 | ipa_get_jf_pass_through_operation (jump_func), | |
4752 | newval, | |
4753 | ipa_get_jf_pass_through_operand (jump_func), | |
4754 | type); | |
4755 | } | |
4756 | else | |
4757 | t = ipa_value_from_jfunc (IPA_NODE_REF (cs->caller), jump_func, | |
4758 | type); | |
310bc633 MJ |
4759 | if (!t |
4760 | || (newval | |
df0d8136 JH |
4761 | && !values_equal_for_ipcp_p (t, newval)) |
4762 | || (!first && !newval)) | |
3949c4a7 | 4763 | { |
310bc633 MJ |
4764 | newval = NULL_TREE; |
4765 | break; | |
3949c4a7 | 4766 | } |
310bc633 MJ |
4767 | else |
4768 | newval = t; | |
df0d8136 | 4769 | first = false; |
3949c4a7 MJ |
4770 | } |
4771 | ||
310bc633 MJ |
4772 | if (newval) |
4773 | { | |
4774 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
4775 | { | |
2c9561b5 | 4776 | fprintf (dump_file, " adding an extra known scalar value "); |
310bc633 | 4777 | print_ipcp_constant_value (dump_file, newval); |
0e8853ee JH |
4778 | fprintf (dump_file, " for "); |
4779 | ipa_dump_param (dump_file, info, i); | |
310bc633 MJ |
4780 | fprintf (dump_file, "\n"); |
4781 | } | |
5e45130d | 4782 | |
44210a96 | 4783 | known_csts[i] = newval; |
310bc633 | 4784 | } |
5e45130d | 4785 | } |
5e45130d JH |
4786 | } |
4787 | ||
44210a96 MJ |
4788 | /* Given a NODE and a subset of its CALLERS, try to populate plank slots in |
4789 | KNOWN_CONTEXTS with polymorphic contexts that are also known for all of the | |
4790 | CALLERS. */ | |
4791 | ||
4792 | static void | |
4793 | find_more_contexts_for_caller_subset (cgraph_node *node, | |
4794 | vec<ipa_polymorphic_call_context> | |
4795 | *known_contexts, | |
4796 | vec<cgraph_edge *> callers) | |
4797 | { | |
4798 | ipa_node_params *info = IPA_NODE_REF (node); | |
4799 | int i, count = ipa_get_param_count (info); | |
4800 | ||
155c9907 | 4801 | for (i = 0; i < count; i++) |
44210a96 MJ |
4802 | { |
4803 | cgraph_edge *cs; | |
4804 | ||
4805 | if (ipa_get_poly_ctx_lat (info, i)->bottom | |
4806 | || (known_contexts->exists () | |
4807 | && !(*known_contexts)[i].useless_p ())) | |
4808 | continue; | |
4809 | ||
4810 | ipa_polymorphic_call_context newval; | |
df0d8136 | 4811 | bool first = true; |
44210a96 MJ |
4812 | int j; |
4813 | ||
4814 | FOR_EACH_VEC_ELT (callers, j, cs) | |
4815 | { | |
a33c028e JH |
4816 | if (!IPA_EDGE_REF (cs) |
4817 | || i >= ipa_get_cs_argument_count (IPA_EDGE_REF (cs))) | |
44210a96 MJ |
4818 | return; |
4819 | ipa_jump_func *jfunc = ipa_get_ith_jump_func (IPA_EDGE_REF (cs), | |
4820 | i); | |
4821 | ipa_polymorphic_call_context ctx; | |
4822 | ctx = ipa_context_from_jfunc (IPA_NODE_REF (cs->caller), cs, i, | |
4823 | jfunc); | |
df0d8136 | 4824 | if (first) |
44210a96 | 4825 | { |
44210a96 | 4826 | newval = ctx; |
df0d8136 | 4827 | first = false; |
44210a96 | 4828 | } |
df0d8136 JH |
4829 | else |
4830 | newval.meet_with (ctx); | |
4831 | if (newval.useless_p ()) | |
4832 | break; | |
44210a96 MJ |
4833 | } |
4834 | ||
df0d8136 | 4835 | if (!newval.useless_p ()) |
44210a96 MJ |
4836 | { |
4837 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
4838 | { | |
4839 | fprintf (dump_file, " adding an extra known polymorphic " | |
4840 | "context "); | |
4841 | print_ipcp_constant_value (dump_file, newval); | |
4842 | fprintf (dump_file, " for "); | |
4843 | ipa_dump_param (dump_file, info, i); | |
4844 | fprintf (dump_file, "\n"); | |
4845 | } | |
4846 | ||
4847 | if (!known_contexts->exists ()) | |
cb3874dc ML |
4848 | known_contexts->safe_grow_cleared (ipa_get_param_count (info), |
4849 | true); | |
44210a96 MJ |
4850 | (*known_contexts)[i] = newval; |
4851 | } | |
4852 | ||
4853 | } | |
4854 | } | |
4855 | ||
2c9561b5 MJ |
4856 | /* Go through PLATS and create a vector of values consisting of values and |
4857 | offsets (minus OFFSET) of lattices that contain only a single value. */ | |
4858 | ||
eb270950 | 4859 | static vec<ipa_agg_value> |
99b1c316 | 4860 | copy_plats_to_inter (class ipcp_param_lattices *plats, HOST_WIDE_INT offset) |
2c9561b5 | 4861 | { |
eb270950 | 4862 | vec<ipa_agg_value> res = vNULL; |
2c9561b5 MJ |
4863 | |
4864 | if (!plats->aggs || plats->aggs_contain_variable || plats->aggs_bottom) | |
6e1aa848 | 4865 | return vNULL; |
2c9561b5 MJ |
4866 | |
4867 | for (struct ipcp_agg_lattice *aglat = plats->aggs; aglat; aglat = aglat->next) | |
c0cb5055 | 4868 | if (aglat->is_single_const ()) |
2c9561b5 | 4869 | { |
eb270950 | 4870 | struct ipa_agg_value ti; |
2c9561b5 MJ |
4871 | ti.offset = aglat->offset - offset; |
4872 | ti.value = aglat->values->value; | |
9771b263 | 4873 | res.safe_push (ti); |
2c9561b5 MJ |
4874 | } |
4875 | return res; | |
4876 | } | |
4877 | ||
4878 | /* Intersect all values in INTER with single value lattices in PLATS (while | |
4879 | subtracting OFFSET). */ | |
4880 | ||
4881 | static void | |
99b1c316 | 4882 | intersect_with_plats (class ipcp_param_lattices *plats, |
eb270950 | 4883 | vec<ipa_agg_value> *inter, |
2c9561b5 MJ |
4884 | HOST_WIDE_INT offset) |
4885 | { | |
4886 | struct ipcp_agg_lattice *aglat; | |
eb270950 | 4887 | struct ipa_agg_value *item; |
2c9561b5 MJ |
4888 | int k; |
4889 | ||
4890 | if (!plats->aggs || plats->aggs_contain_variable || plats->aggs_bottom) | |
4891 | { | |
9771b263 | 4892 | inter->release (); |
2c9561b5 MJ |
4893 | return; |
4894 | } | |
4895 | ||
4896 | aglat = plats->aggs; | |
9771b263 | 4897 | FOR_EACH_VEC_ELT (*inter, k, item) |
2c9561b5 MJ |
4898 | { |
4899 | bool found = false; | |
4900 | if (!item->value) | |
4901 | continue; | |
4902 | while (aglat) | |
4903 | { | |
4904 | if (aglat->offset - offset > item->offset) | |
4905 | break; | |
4906 | if (aglat->offset - offset == item->offset) | |
4907 | { | |
951e27f5 FX |
4908 | if (aglat->is_single_const ()) |
4909 | { | |
4910 | tree value = aglat->values->value; | |
4911 | ||
4912 | if (values_equal_for_ipcp_p (item->value, value)) | |
4913 | found = true; | |
951e27f5 | 4914 | } |
2c9561b5 MJ |
4915 | break; |
4916 | } | |
4917 | aglat = aglat->next; | |
4918 | } | |
4919 | if (!found) | |
4920 | item->value = NULL_TREE; | |
4921 | } | |
4922 | } | |
4923 | ||
5764ee3c | 4924 | /* Copy aggregate replacement values of NODE (which is an IPA-CP clone) to the |
2c9561b5 MJ |
4925 | vector result while subtracting OFFSET from the individual value offsets. */ |
4926 | ||
eb270950 | 4927 | static vec<ipa_agg_value> |
0fd44da3 MJ |
4928 | agg_replacements_to_vector (struct cgraph_node *node, int index, |
4929 | HOST_WIDE_INT offset) | |
2c9561b5 MJ |
4930 | { |
4931 | struct ipa_agg_replacement_value *av; | |
eb270950 | 4932 | vec<ipa_agg_value> res = vNULL; |
2c9561b5 MJ |
4933 | |
4934 | for (av = ipa_get_agg_replacements_for_node (node); av; av = av->next) | |
0fd44da3 MJ |
4935 | if (av->index == index |
4936 | && (av->offset - offset) >= 0) | |
2c9561b5 | 4937 | { |
eb270950 | 4938 | struct ipa_agg_value item; |
2c9561b5 MJ |
4939 | gcc_checking_assert (av->value); |
4940 | item.offset = av->offset - offset; | |
4941 | item.value = av->value; | |
9771b263 | 4942 | res.safe_push (item); |
2c9561b5 MJ |
4943 | } |
4944 | ||
4945 | return res; | |
4946 | } | |
4947 | ||
4948 | /* Intersect all values in INTER with those that we have already scheduled to | |
4949 | be replaced in parameter number INDEX of NODE, which is an IPA-CP clone | |
4950 | (while subtracting OFFSET). */ | |
4951 | ||
4952 | static void | |
4953 | intersect_with_agg_replacements (struct cgraph_node *node, int index, | |
eb270950 | 4954 | vec<ipa_agg_value> *inter, |
2c9561b5 MJ |
4955 | HOST_WIDE_INT offset) |
4956 | { | |
4957 | struct ipa_agg_replacement_value *srcvals; | |
eb270950 | 4958 | struct ipa_agg_value *item; |
2c9561b5 MJ |
4959 | int i; |
4960 | ||
4961 | srcvals = ipa_get_agg_replacements_for_node (node); | |
4962 | if (!srcvals) | |
4963 | { | |
9771b263 | 4964 | inter->release (); |
2c9561b5 MJ |
4965 | return; |
4966 | } | |
4967 | ||
9771b263 | 4968 | FOR_EACH_VEC_ELT (*inter, i, item) |
2c9561b5 MJ |
4969 | { |
4970 | struct ipa_agg_replacement_value *av; | |
4971 | bool found = false; | |
4972 | if (!item->value) | |
4973 | continue; | |
4974 | for (av = srcvals; av; av = av->next) | |
4975 | { | |
4976 | gcc_checking_assert (av->value); | |
4977 | if (av->index == index | |
4978 | && av->offset - offset == item->offset) | |
4979 | { | |
4980 | if (values_equal_for_ipcp_p (item->value, av->value)) | |
4981 | found = true; | |
4982 | break; | |
4983 | } | |
4984 | } | |
4985 | if (!found) | |
4986 | item->value = NULL_TREE; | |
4987 | } | |
4988 | } | |
4989 | ||
7e9f2b6e MJ |
4990 | /* Intersect values in INTER with aggregate values that come along edge CS to |
4991 | parameter number INDEX and return it. If INTER does not actually exist yet, | |
4992 | copy all incoming values to it. If we determine we ended up with no values | |
4993 | whatsoever, return a released vector. */ | |
4994 | ||
eb270950 | 4995 | static vec<ipa_agg_value> |
7e9f2b6e | 4996 | intersect_aggregates_with_edge (struct cgraph_edge *cs, int index, |
eb270950 | 4997 | vec<ipa_agg_value> inter) |
7e9f2b6e MJ |
4998 | { |
4999 | struct ipa_jump_func *jfunc; | |
5000 | jfunc = ipa_get_ith_jump_func (IPA_EDGE_REF (cs), index); | |
5001 | if (jfunc->type == IPA_JF_PASS_THROUGH | |
5002 | && ipa_get_jf_pass_through_operation (jfunc) == NOP_EXPR) | |
5003 | { | |
99b1c316 | 5004 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
7e9f2b6e MJ |
5005 | int src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
5006 | ||
5007 | if (caller_info->ipcp_orig_node) | |
5008 | { | |
5009 | struct cgraph_node *orig_node = caller_info->ipcp_orig_node; | |
99b1c316 | 5010 | class ipcp_param_lattices *orig_plats; |
7e9f2b6e MJ |
5011 | orig_plats = ipa_get_parm_lattices (IPA_NODE_REF (orig_node), |
5012 | src_idx); | |
5013 | if (agg_pass_through_permissible_p (orig_plats, jfunc)) | |
5014 | { | |
5015 | if (!inter.exists ()) | |
0fd44da3 | 5016 | inter = agg_replacements_to_vector (cs->caller, src_idx, 0); |
7e9f2b6e MJ |
5017 | else |
5018 | intersect_with_agg_replacements (cs->caller, src_idx, | |
5019 | &inter, 0); | |
32633ec8 | 5020 | return inter; |
c8f40352 | 5021 | } |
7e9f2b6e MJ |
5022 | } |
5023 | else | |
5024 | { | |
99b1c316 | 5025 | class ipcp_param_lattices *src_plats; |
7e9f2b6e MJ |
5026 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); |
5027 | if (agg_pass_through_permissible_p (src_plats, jfunc)) | |
5028 | { | |
5029 | /* Currently we do not produce clobber aggregate jump | |
5030 | functions, adjust when we do. */ | |
5031 | gcc_checking_assert (!jfunc->agg.items); | |
5032 | if (!inter.exists ()) | |
5033 | inter = copy_plats_to_inter (src_plats, 0); | |
5034 | else | |
5035 | intersect_with_plats (src_plats, &inter, 0); | |
32633ec8 | 5036 | return inter; |
c8f40352 | 5037 | } |
7e9f2b6e MJ |
5038 | } |
5039 | } | |
5040 | else if (jfunc->type == IPA_JF_ANCESTOR | |
5041 | && ipa_get_jf_ancestor_agg_preserved (jfunc)) | |
5042 | { | |
99b1c316 | 5043 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
7e9f2b6e | 5044 | int src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
99b1c316 | 5045 | class ipcp_param_lattices *src_plats; |
7e9f2b6e MJ |
5046 | HOST_WIDE_INT delta = ipa_get_jf_ancestor_offset (jfunc); |
5047 | ||
5048 | if (caller_info->ipcp_orig_node) | |
5049 | { | |
5050 | if (!inter.exists ()) | |
0fd44da3 | 5051 | inter = agg_replacements_to_vector (cs->caller, src_idx, delta); |
7e9f2b6e | 5052 | else |
0fd44da3 | 5053 | intersect_with_agg_replacements (cs->caller, src_idx, &inter, |
7e9f2b6e MJ |
5054 | delta); |
5055 | } | |
5056 | else | |
5057 | { | |
5de73c05 | 5058 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); |
7e9f2b6e MJ |
5059 | /* Currently we do not produce clobber aggregate jump |
5060 | functions, adjust when we do. */ | |
5061 | gcc_checking_assert (!src_plats->aggs || !jfunc->agg.items); | |
5062 | if (!inter.exists ()) | |
5063 | inter = copy_plats_to_inter (src_plats, delta); | |
5064 | else | |
5065 | intersect_with_plats (src_plats, &inter, delta); | |
5066 | } | |
32633ec8 | 5067 | return inter; |
7e9f2b6e | 5068 | } |
32633ec8 FX |
5069 | |
5070 | if (jfunc->agg.items) | |
7e9f2b6e | 5071 | { |
eb270950 FX |
5072 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
5073 | struct ipa_agg_value *item; | |
7e9f2b6e MJ |
5074 | int k; |
5075 | ||
5076 | if (!inter.exists ()) | |
5077 | for (unsigned i = 0; i < jfunc->agg.items->length (); i++) | |
eb270950 FX |
5078 | { |
5079 | struct ipa_agg_jf_item *agg_item = &(*jfunc->agg.items)[i]; | |
a0f6a8cb FX |
5080 | tree value = ipa_agg_value_from_node (caller_info, cs->caller, |
5081 | agg_item); | |
5082 | if (value) | |
951e27f5 | 5083 | { |
a0f6a8cb | 5084 | struct ipa_agg_value agg_value; |
eb270950 | 5085 | |
eb270950 | 5086 | agg_value.value = value; |
a0f6a8cb FX |
5087 | agg_value.offset = agg_item->offset; |
5088 | inter.safe_push (agg_value); | |
eb270950 FX |
5089 | } |
5090 | } | |
7e9f2b6e MJ |
5091 | else |
5092 | FOR_EACH_VEC_ELT (inter, k, item) | |
5093 | { | |
5094 | int l = 0; | |
5de73c05 | 5095 | bool found = false; |
7e9f2b6e MJ |
5096 | |
5097 | if (!item->value) | |
5098 | continue; | |
5099 | ||
5100 | while ((unsigned) l < jfunc->agg.items->length ()) | |
5101 | { | |
5102 | struct ipa_agg_jf_item *ti; | |
5103 | ti = &(*jfunc->agg.items)[l]; | |
5104 | if (ti->offset > item->offset) | |
5105 | break; | |
5106 | if (ti->offset == item->offset) | |
5107 | { | |
951e27f5 FX |
5108 | tree value; |
5109 | ||
a0f6a8cb FX |
5110 | /* Besides simple pass-through aggregate jump function, |
5111 | arithmetic aggregate jump function could also bring | |
5112 | same aggregate value as parameter passed-in for | |
5113 | self-feeding recursive call. For example, | |
5114 | ||
5115 | fn (int *i) | |
5116 | { | |
5117 | int j = *i & 1; | |
5118 | fn (&j); | |
5119 | } | |
5120 | ||
5121 | Given that *i is 0, recursive propagation via (*i & 1) | |
5122 | also gets 0. */ | |
5123 | if (self_recursive_agg_pass_through_p (cs, ti, index, | |
5124 | false)) | |
5125 | value = ipa_get_jf_arith_result ( | |
5126 | ti->value.pass_through.operation, | |
5127 | item->value, | |
5128 | ti->value.pass_through.operand, | |
5129 | ti->type); | |
5130 | else | |
5131 | value = ipa_agg_value_from_node (caller_info, | |
5132 | cs->caller, ti); | |
5133 | ||
5134 | if (value && values_equal_for_ipcp_p (item->value, value)) | |
5135 | found = true; | |
7e9f2b6e MJ |
5136 | break; |
5137 | } | |
5138 | l++; | |
5139 | } | |
5140 | if (!found) | |
5141 | item->value = NULL; | |
5142 | } | |
5143 | } | |
5144 | else | |
5145 | { | |
c3284718 | 5146 | inter.release (); |
eb270950 | 5147 | return vNULL; |
7e9f2b6e MJ |
5148 | } |
5149 | return inter; | |
5150 | } | |
5151 | ||
2c9561b5 MJ |
5152 | /* Look at edges in CALLERS and collect all known aggregate values that arrive |
5153 | from all of them. */ | |
5154 | ||
5155 | static struct ipa_agg_replacement_value * | |
5156 | find_aggregate_values_for_callers_subset (struct cgraph_node *node, | |
d52f5295 | 5157 | vec<cgraph_edge *> callers) |
2c9561b5 | 5158 | { |
99b1c316 | 5159 | class ipa_node_params *dest_info = IPA_NODE_REF (node); |
6f9549ee MJ |
5160 | struct ipa_agg_replacement_value *res; |
5161 | struct ipa_agg_replacement_value **tail = &res; | |
2c9561b5 | 5162 | struct cgraph_edge *cs; |
dffdd6e5 | 5163 | int i, j, count = ipa_get_param_count (dest_info); |
2c9561b5 | 5164 | |
9771b263 | 5165 | FOR_EACH_VEC_ELT (callers, j, cs) |
2c9561b5 | 5166 | { |
a33c028e JH |
5167 | if (!IPA_EDGE_REF (cs)) |
5168 | { | |
5169 | count = 0; | |
5170 | break; | |
5171 | } | |
2c9561b5 MJ |
5172 | int c = ipa_get_cs_argument_count (IPA_EDGE_REF (cs)); |
5173 | if (c < count) | |
5174 | count = c; | |
5175 | } | |
5176 | ||
155c9907 | 5177 | for (i = 0; i < count; i++) |
2c9561b5 MJ |
5178 | { |
5179 | struct cgraph_edge *cs; | |
eb270950 FX |
5180 | vec<ipa_agg_value> inter = vNULL; |
5181 | struct ipa_agg_value *item; | |
99b1c316 | 5182 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (dest_info, i); |
2c9561b5 MJ |
5183 | int j; |
5184 | ||
5185 | /* Among other things, the following check should deal with all by_ref | |
5186 | mismatches. */ | |
7b920a9a | 5187 | if (plats->aggs_bottom) |
2c9561b5 MJ |
5188 | continue; |
5189 | ||
9771b263 | 5190 | FOR_EACH_VEC_ELT (callers, j, cs) |
2c9561b5 | 5191 | { |
7b668576 MJ |
5192 | struct ipa_jump_func *jfunc |
5193 | = ipa_get_ith_jump_func (IPA_EDGE_REF (cs), i); | |
cf254442 MJ |
5194 | if (self_recursive_pass_through_p (cs, jfunc, i) |
5195 | && (!plats->aggs_by_ref | |
5196 | || ipa_get_jf_pass_through_agg_preserved (jfunc))) | |
7b668576 | 5197 | continue; |
7e9f2b6e | 5198 | inter = intersect_aggregates_with_edge (cs, i, inter); |
2c9561b5 | 5199 | |
9771b263 | 5200 | if (!inter.exists ()) |
2c9561b5 MJ |
5201 | goto next_param; |
5202 | } | |
5203 | ||
9771b263 | 5204 | FOR_EACH_VEC_ELT (inter, j, item) |
2c9561b5 MJ |
5205 | { |
5206 | struct ipa_agg_replacement_value *v; | |
5207 | ||
5208 | if (!item->value) | |
5209 | continue; | |
5210 | ||
766090c2 | 5211 | v = ggc_alloc<ipa_agg_replacement_value> (); |
2c9561b5 MJ |
5212 | v->index = i; |
5213 | v->offset = item->offset; | |
5214 | v->value = item->value; | |
7b920a9a | 5215 | v->by_ref = plats->aggs_by_ref; |
6f9549ee MJ |
5216 | *tail = v; |
5217 | tail = &v->next; | |
2c9561b5 MJ |
5218 | } |
5219 | ||
5220 | next_param: | |
9771b263 DN |
5221 | if (inter.exists ()) |
5222 | inter.release (); | |
2c9561b5 | 5223 | } |
6f9549ee | 5224 | *tail = NULL; |
2c9561b5 MJ |
5225 | return res; |
5226 | } | |
5227 | ||
2c9561b5 MJ |
5228 | /* Determine whether CS also brings all scalar values that the NODE is |
5229 | specialized for. */ | |
5230 | ||
5231 | static bool | |
5232 | cgraph_edge_brings_all_scalars_for_node (struct cgraph_edge *cs, | |
5233 | struct cgraph_node *node) | |
5234 | { | |
99b1c316 | 5235 | class ipa_node_params *dest_info = IPA_NODE_REF (node); |
2c9561b5 | 5236 | int count = ipa_get_param_count (dest_info); |
99b1c316 MS |
5237 | class ipa_node_params *caller_info; |
5238 | class ipa_edge_args *args; | |
2c9561b5 MJ |
5239 | int i; |
5240 | ||
5241 | caller_info = IPA_NODE_REF (cs->caller); | |
5242 | args = IPA_EDGE_REF (cs); | |
5243 | for (i = 0; i < count; i++) | |
5244 | { | |
5245 | struct ipa_jump_func *jump_func; | |
5246 | tree val, t; | |
5247 | ||
44210a96 | 5248 | val = dest_info->known_csts[i]; |
2c9561b5 MJ |
5249 | if (!val) |
5250 | continue; | |
5251 | ||
5252 | if (i >= ipa_get_cs_argument_count (args)) | |
5253 | return false; | |
5254 | jump_func = ipa_get_ith_jump_func (args, i); | |
e5cf5e11 PK |
5255 | t = ipa_value_from_jfunc (caller_info, jump_func, |
5256 | ipa_get_type (dest_info, i)); | |
2c9561b5 MJ |
5257 | if (!t || !values_equal_for_ipcp_p (val, t)) |
5258 | return false; | |
5259 | } | |
5260 | return true; | |
5261 | } | |
5262 | ||
5263 | /* Determine whether CS also brings all aggregate values that NODE is | |
5264 | specialized for. */ | |
5265 | static bool | |
5266 | cgraph_edge_brings_all_agg_vals_for_node (struct cgraph_edge *cs, | |
5267 | struct cgraph_node *node) | |
5268 | { | |
99b1c316 | 5269 | class ipa_node_params *orig_node_info; |
2c9561b5 | 5270 | struct ipa_agg_replacement_value *aggval; |
7e9f2b6e | 5271 | int i, ec, count; |
2c9561b5 MJ |
5272 | |
5273 | aggval = ipa_get_agg_replacements_for_node (node); | |
7e9f2b6e MJ |
5274 | if (!aggval) |
5275 | return true; | |
5276 | ||
5277 | count = ipa_get_param_count (IPA_NODE_REF (node)); | |
5278 | ec = ipa_get_cs_argument_count (IPA_EDGE_REF (cs)); | |
5279 | if (ec < count) | |
5280 | for (struct ipa_agg_replacement_value *av = aggval; av; av = av->next) | |
5281 | if (aggval->index >= ec) | |
5282 | return false; | |
5283 | ||
9576e7b1 | 5284 | orig_node_info = IPA_NODE_REF (IPA_NODE_REF (node)->ipcp_orig_node); |
7e9f2b6e MJ |
5285 | |
5286 | for (i = 0; i < count; i++) | |
2c9561b5 | 5287 | { |
99b1c316 | 5288 | class ipcp_param_lattices *plats; |
7e9f2b6e MJ |
5289 | bool interesting = false; |
5290 | for (struct ipa_agg_replacement_value *av = aggval; av; av = av->next) | |
5291 | if (aggval->index == i) | |
5292 | { | |
5293 | interesting = true; | |
5294 | break; | |
5295 | } | |
5296 | if (!interesting) | |
5297 | continue; | |
5298 | ||
9576e7b1 | 5299 | plats = ipa_get_parm_lattices (orig_node_info, aggval->index); |
7e9f2b6e | 5300 | if (plats->aggs_bottom) |
2c9561b5 | 5301 | return false; |
2c9561b5 | 5302 | |
8bda7ce8 | 5303 | vec<ipa_agg_value> values = intersect_aggregates_with_edge (cs, i, vNULL); |
c3284718 | 5304 | if (!values.exists ()) |
2c9561b5 MJ |
5305 | return false; |
5306 | ||
7e9f2b6e MJ |
5307 | for (struct ipa_agg_replacement_value *av = aggval; av; av = av->next) |
5308 | if (aggval->index == i) | |
5309 | { | |
eb270950 | 5310 | struct ipa_agg_value *item; |
7e9f2b6e MJ |
5311 | int j; |
5312 | bool found = false; | |
5313 | FOR_EACH_VEC_ELT (values, j, item) | |
5314 | if (item->value | |
5315 | && item->offset == av->offset | |
5316 | && values_equal_for_ipcp_p (item->value, av->value)) | |
c3272a92 PCC |
5317 | { |
5318 | found = true; | |
5319 | break; | |
5320 | } | |
7e9f2b6e MJ |
5321 | if (!found) |
5322 | { | |
c3284718 | 5323 | values.release (); |
7e9f2b6e MJ |
5324 | return false; |
5325 | } | |
5326 | } | |
8bda7ce8 | 5327 | values.release (); |
2c9561b5 MJ |
5328 | } |
5329 | return true; | |
5330 | } | |
5331 | ||
310bc633 MJ |
5332 | /* Given an original NODE and a VAL for which we have already created a |
5333 | specialized clone, look whether there are incoming edges that still lead | |
5334 | into the old node but now also bring the requested value and also conform to | |
026c3cfd | 5335 | all other criteria such that they can be redirected the special node. |
310bc633 | 5336 | This function can therefore redirect the final edge in a SCC. */ |
3e66255c | 5337 | |
c0cb5055 | 5338 | template <typename valtype> |
3e66255c | 5339 | static void |
c0cb5055 | 5340 | perhaps_add_new_callers (cgraph_node *node, ipcp_value<valtype> *val) |
3e66255c | 5341 | { |
c0cb5055 | 5342 | ipcp_value_source<valtype> *src; |
3995f3a2 | 5343 | profile_count redirected_sum = profile_count::zero (); |
3e66255c | 5344 | |
310bc633 | 5345 | for (src = val->sources; src; src = src->next) |
3e66255c | 5346 | { |
310bc633 MJ |
5347 | struct cgraph_edge *cs = src->cs; |
5348 | while (cs) | |
5349 | { | |
7b668576 | 5350 | if (cgraph_edge_brings_value_p (cs, src, node, val) |
47f4756e MJ |
5351 | && cgraph_edge_brings_all_scalars_for_node (cs, val->spec_node) |
5352 | && cgraph_edge_brings_all_agg_vals_for_node (cs, val->spec_node)) | |
310bc633 | 5353 | { |
47f4756e | 5354 | if (dump_file) |
464d0118 ML |
5355 | fprintf (dump_file, " - adding an extra caller %s of %s\n", |
5356 | cs->caller->dump_name (), | |
5357 | val->spec_node->dump_name ()); | |
47f4756e | 5358 | |
6a4bad95 MJ |
5359 | cs->redirect_callee_duplicating_thunks (val->spec_node); |
5360 | val->spec_node->expand_all_artificial_thunks (); | |
1bad9c18 JH |
5361 | if (cs->count.ipa ().initialized_p ()) |
5362 | redirected_sum = redirected_sum + cs->count.ipa (); | |
310bc633 MJ |
5363 | } |
5364 | cs = get_next_cgraph_edge_clone (cs); | |
5365 | } | |
3e66255c | 5366 | } |
310bc633 | 5367 | |
e3951b03 | 5368 | if (redirected_sum.nonzero_p ()) |
310bc633 | 5369 | update_specialized_profile (val->spec_node, node, redirected_sum); |
3e66255c MJ |
5370 | } |
5371 | ||
44210a96 | 5372 | /* Return true if KNOWN_CONTEXTS contain at least one useful context. */ |
3e66255c | 5373 | |
44210a96 MJ |
5374 | static bool |
5375 | known_contexts_useful_p (vec<ipa_polymorphic_call_context> known_contexts) | |
5376 | { | |
5377 | ipa_polymorphic_call_context *ctx; | |
5378 | int i; | |
5379 | ||
5380 | FOR_EACH_VEC_ELT (known_contexts, i, ctx) | |
5381 | if (!ctx->useless_p ()) | |
5382 | return true; | |
5383 | return false; | |
5384 | } | |
5385 | ||
5386 | /* Return a copy of KNOWN_CSTS if it is not empty, otherwise return vNULL. */ | |
5387 | ||
5388 | static vec<ipa_polymorphic_call_context> | |
5389 | copy_useful_known_contexts (vec<ipa_polymorphic_call_context> known_contexts) | |
5390 | { | |
5391 | if (known_contexts_useful_p (known_contexts)) | |
5392 | return known_contexts.copy (); | |
5393 | else | |
5394 | return vNULL; | |
5395 | } | |
5396 | ||
9d5af1db MJ |
5397 | /* Copy known scalar values from AVALS into KNOWN_CSTS and modify the copy |
5398 | according to VAL and INDEX. If non-empty, replace KNOWN_CONTEXTS with its | |
5399 | copy too. */ | |
310bc633 | 5400 | |
518dc859 | 5401 | static void |
9d5af1db MJ |
5402 | copy_known_vectors_add_val (ipa_auto_call_arg_values *avals, |
5403 | vec<tree> *known_csts, | |
5404 | vec<ipa_polymorphic_call_context> *known_contexts, | |
5405 | ipcp_value<tree> *val, int index) | |
518dc859 | 5406 | { |
9d5af1db MJ |
5407 | *known_csts = avals->m_known_vals.copy (); |
5408 | *known_contexts = copy_useful_known_contexts (avals->m_known_contexts); | |
44210a96 MJ |
5409 | (*known_csts)[index] = val->value; |
5410 | } | |
518dc859 | 5411 | |
9d5af1db MJ |
5412 | /* Copy known scalar values from AVALS into KNOWN_CSTS. Similarly, copy |
5413 | contexts to KNOWN_CONTEXTS and modify the copy according to VAL and | |
5414 | INDEX. */ | |
44210a96 MJ |
5415 | |
5416 | static void | |
9d5af1db MJ |
5417 | copy_known_vectors_add_val (ipa_auto_call_arg_values *avals, |
5418 | vec<tree> *known_csts, | |
5419 | vec<ipa_polymorphic_call_context> *known_contexts, | |
5420 | ipcp_value<ipa_polymorphic_call_context> *val, | |
5421 | int index) | |
5422 | { | |
5423 | *known_csts = avals->m_known_vals.copy (); | |
5424 | *known_contexts = avals->m_known_contexts.copy (); | |
44210a96 | 5425 | (*known_contexts)[index] = val->value; |
310bc633 | 5426 | } |
5e45130d | 5427 | |
44210a96 MJ |
5428 | /* Return true if OFFSET indicates this was not an aggregate value or there is |
5429 | a replacement equivalent to VALUE, INDEX and OFFSET among those in the | |
5430 | AGGVALS list. */ | |
2c9561b5 MJ |
5431 | |
5432 | DEBUG_FUNCTION bool | |
44210a96 MJ |
5433 | ipcp_val_agg_replacement_ok_p (ipa_agg_replacement_value *aggvals, |
5434 | int index, HOST_WIDE_INT offset, tree value) | |
2c9561b5 | 5435 | { |
44210a96 MJ |
5436 | if (offset == -1) |
5437 | return true; | |
5438 | ||
2c9561b5 MJ |
5439 | while (aggvals) |
5440 | { | |
5441 | if (aggvals->index == index | |
5442 | && aggvals->offset == offset | |
5443 | && values_equal_for_ipcp_p (aggvals->value, value)) | |
5444 | return true; | |
5445 | aggvals = aggvals->next; | |
5446 | } | |
5447 | return false; | |
5448 | } | |
5449 | ||
f25ae20e | 5450 | /* Return true if offset is minus one because source of a polymorphic context |
44210a96 MJ |
5451 | cannot be an aggregate value. */ |
5452 | ||
5453 | DEBUG_FUNCTION bool | |
5454 | ipcp_val_agg_replacement_ok_p (ipa_agg_replacement_value *, | |
5455 | int , HOST_WIDE_INT offset, | |
5456 | ipa_polymorphic_call_context) | |
5457 | { | |
5458 | return offset == -1; | |
5459 | } | |
5460 | ||
9d5af1db MJ |
5461 | /* Decide whether to create a special version of NODE for value VAL of |
5462 | parameter at the given INDEX. If OFFSET is -1, the value is for the | |
5463 | parameter itself, otherwise it is stored at the given OFFSET of the | |
5464 | parameter. AVALS describes the other already known values. */ | |
2c9561b5 | 5465 | |
c0cb5055 | 5466 | template <typename valtype> |
2c9561b5 MJ |
5467 | static bool |
5468 | decide_about_value (struct cgraph_node *node, int index, HOST_WIDE_INT offset, | |
9d5af1db | 5469 | ipcp_value<valtype> *val, ipa_auto_call_arg_values *avals) |
2c9561b5 MJ |
5470 | { |
5471 | struct ipa_agg_replacement_value *aggvals; | |
b86aedb0 MJ |
5472 | int caller_count; |
5473 | sreal freq_sum; | |
3995f3a2 | 5474 | profile_count count_sum; |
d52f5295 | 5475 | vec<cgraph_edge *> callers; |
2c9561b5 MJ |
5476 | |
5477 | if (val->spec_node) | |
5478 | { | |
5479 | perhaps_add_new_callers (node, val); | |
5480 | return false; | |
5481 | } | |
f7725a48 | 5482 | else if (val->local_size_cost + overall_size > get_max_overall_size (node)) |
2c9561b5 MJ |
5483 | { |
5484 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5485 | fprintf (dump_file, " Ignoring candidate value because " | |
f7725a48 | 5486 | "maximum unit size would be reached with %li.\n", |
2c9561b5 MJ |
5487 | val->local_size_cost + overall_size); |
5488 | return false; | |
5489 | } | |
47f4756e | 5490 | else if (!get_info_about_necessary_edges (val, node, &freq_sum, &count_sum, |
2c9561b5 MJ |
5491 | &caller_count)) |
5492 | return false; | |
5493 | ||
86deadf8 MJ |
5494 | if (!dbg_cnt (ipa_cp_values)) |
5495 | return false; | |
5496 | ||
2c9561b5 MJ |
5497 | if (dump_file && (dump_flags & TDF_DETAILS)) |
5498 | { | |
5499 | fprintf (dump_file, " - considering value "); | |
5500 | print_ipcp_constant_value (dump_file, val->value); | |
0e8853ee JH |
5501 | fprintf (dump_file, " for "); |
5502 | ipa_dump_param (dump_file, IPA_NODE_REF (node), index); | |
2c9561b5 MJ |
5503 | if (offset != -1) |
5504 | fprintf (dump_file, ", offset: " HOST_WIDE_INT_PRINT_DEC, offset); | |
5505 | fprintf (dump_file, " (caller_count: %i)\n", caller_count); | |
5506 | } | |
5507 | ||
5508 | if (!good_cloning_opportunity_p (node, val->local_time_benefit, | |
5509 | freq_sum, count_sum, | |
5510 | val->local_size_cost) | |
a6a0db7d MJ |
5511 | && !good_cloning_opportunity_p (node, val->prop_time_benefit, |
5512 | freq_sum, count_sum, val->prop_size_cost)) | |
2c9561b5 MJ |
5513 | return false; |
5514 | ||
5515 | if (dump_file) | |
464d0118 ML |
5516 | fprintf (dump_file, " Creating a specialized node of %s.\n", |
5517 | node->dump_name ()); | |
2c9561b5 | 5518 | |
9d5af1db MJ |
5519 | vec<tree> known_csts; |
5520 | vec<ipa_polymorphic_call_context> known_contexts; | |
5521 | ||
47f4756e | 5522 | callers = gather_edges_for_value (val, node, caller_count); |
2c9561b5 | 5523 | if (offset == -1) |
9d5af1db | 5524 | copy_known_vectors_add_val (avals, &known_csts, &known_contexts, val, index); |
44210a96 MJ |
5525 | else |
5526 | { | |
9d5af1db MJ |
5527 | known_csts = avals->m_known_vals.copy (); |
5528 | known_contexts = copy_useful_known_contexts (avals->m_known_contexts); | |
44210a96 MJ |
5529 | } |
5530 | find_more_scalar_values_for_callers_subset (node, known_csts, callers); | |
5531 | find_more_contexts_for_caller_subset (node, &known_contexts, callers); | |
2c9561b5 | 5532 | aggvals = find_aggregate_values_for_callers_subset (node, callers); |
44210a96 MJ |
5533 | gcc_checking_assert (ipcp_val_agg_replacement_ok_p (aggvals, index, |
5534 | offset, val->value)); | |
5535 | val->spec_node = create_specialized_node (node, known_csts, known_contexts, | |
5536 | aggvals, callers); | |
2c9561b5 | 5537 | overall_size += val->local_size_cost; |
91153e0a MJ |
5538 | if (dump_file && (dump_flags & TDF_DETAILS)) |
5539 | fprintf (dump_file, " overall size reached %li\n", | |
5540 | overall_size); | |
2c9561b5 MJ |
5541 | |
5542 | /* TODO: If for some lattice there is only one other known value | |
5543 | left, make a special node for it too. */ | |
5544 | ||
5545 | return true; | |
5546 | } | |
5e45130d | 5547 | |
310bc633 | 5548 | /* Decide whether and what specialized clones of NODE should be created. */ |
5e45130d | 5549 | |
310bc633 MJ |
5550 | static bool |
5551 | decide_whether_version_node (struct cgraph_node *node) | |
5552 | { | |
99b1c316 | 5553 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 | 5554 | int i, count = ipa_get_param_count (info); |
310bc633 | 5555 | bool ret = false; |
5e45130d | 5556 | |
310bc633 MJ |
5557 | if (count == 0) |
5558 | return false; | |
5e45130d | 5559 | |
310bc633 | 5560 | if (dump_file && (dump_flags & TDF_DETAILS)) |
464d0118 ML |
5561 | fprintf (dump_file, "\nEvaluating opportunities for %s.\n", |
5562 | node->dump_name ()); | |
5e45130d | 5563 | |
9d5af1db MJ |
5564 | ipa_auto_call_arg_values avals; |
5565 | gather_context_independent_values (info, &avals, false, NULL); | |
5e45130d | 5566 | |
155c9907 | 5567 | for (i = 0; i < count;i++) |
310bc633 | 5568 | { |
99b1c316 | 5569 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 | 5570 | ipcp_lattice<tree> *lat = &plats->itself; |
44210a96 | 5571 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; |
5e45130d | 5572 | |
2c9561b5 | 5573 | if (!lat->bottom |
9d5af1db | 5574 | && !avals.m_known_vals[i]) |
44210a96 MJ |
5575 | { |
5576 | ipcp_value<tree> *val; | |
5577 | for (val = lat->values; val; val = val->next) | |
9d5af1db | 5578 | ret |= decide_about_value (node, i, -1, val, &avals); |
44210a96 | 5579 | } |
61e03ffc | 5580 | |
eb20b778 | 5581 | if (!plats->aggs_bottom) |
518dc859 | 5582 | { |
2c9561b5 | 5583 | struct ipcp_agg_lattice *aglat; |
c0cb5055 | 5584 | ipcp_value<tree> *val; |
2c9561b5 MJ |
5585 | for (aglat = plats->aggs; aglat; aglat = aglat->next) |
5586 | if (!aglat->bottom && aglat->values | |
9d5af1db MJ |
5587 | /* If the following is false, the one value has been considered |
5588 | for cloning for all contexts. */ | |
2c9561b5 | 5589 | && (plats->aggs_contain_variable |
c0cb5055 | 5590 | || !aglat->is_single_const ())) |
2c9561b5 | 5591 | for (val = aglat->values; val; val = val->next) |
9d5af1db | 5592 | ret |= decide_about_value (node, i, aglat->offset, val, &avals); |
cc58ceee | 5593 | } |
44210a96 MJ |
5594 | |
5595 | if (!ctxlat->bottom | |
9d5af1db | 5596 | && avals.m_known_contexts[i].useless_p ()) |
44210a96 MJ |
5597 | { |
5598 | ipcp_value<ipa_polymorphic_call_context> *val; | |
5599 | for (val = ctxlat->values; val; val = val->next) | |
9d5af1db | 5600 | ret |= decide_about_value (node, i, -1, val, &avals); |
44210a96 MJ |
5601 | } |
5602 | ||
155c9907 | 5603 | info = IPA_NODE_REF (node); |
310bc633 | 5604 | } |
cc58ceee | 5605 | |
eb20b778 | 5606 | if (info->do_clone_for_all_contexts) |
310bc633 | 5607 | { |
86deadf8 MJ |
5608 | if (!dbg_cnt (ipa_cp_values)) |
5609 | { | |
5610 | info->do_clone_for_all_contexts = false; | |
5611 | return ret; | |
5612 | } | |
5613 | ||
eb20b778 | 5614 | struct cgraph_node *clone; |
a0f6a8cb FX |
5615 | vec<cgraph_edge *> callers = node->collect_callers (); |
5616 | ||
5617 | for (int i = callers.length () - 1; i >= 0; i--) | |
5618 | { | |
5619 | cgraph_edge *cs = callers[i]; | |
5620 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); | |
5621 | ||
5622 | if (caller_info && caller_info->node_dead) | |
5623 | callers.unordered_remove (i); | |
5624 | } | |
5625 | ||
5626 | if (!adjust_callers_for_value_intersection (callers, node)) | |
5627 | { | |
5628 | /* If node is not called by anyone, or all its caller edges are | |
9d5af1db MJ |
5629 | self-recursive, the node is not really in use, no need to do |
5630 | cloning. */ | |
a0f6a8cb | 5631 | callers.release (); |
a0f6a8cb FX |
5632 | info->do_clone_for_all_contexts = false; |
5633 | return ret; | |
5634 | } | |
cc58ceee | 5635 | |
310bc633 | 5636 | if (dump_file) |
464d0118 ML |
5637 | fprintf (dump_file, " - Creating a specialized node of %s " |
5638 | "for all known contexts.\n", node->dump_name ()); | |
5e45130d | 5639 | |
9d5af1db MJ |
5640 | vec<tree> known_csts = avals.m_known_vals.copy (); |
5641 | vec<ipa_polymorphic_call_context> known_contexts | |
5642 | = copy_useful_known_contexts (avals.m_known_contexts); | |
7b668576 MJ |
5643 | find_more_scalar_values_for_callers_subset (node, known_csts, callers); |
5644 | find_more_contexts_for_caller_subset (node, &known_contexts, callers); | |
5645 | ipa_agg_replacement_value *aggvals | |
5646 | = find_aggregate_values_for_callers_subset (node, callers); | |
44210a96 MJ |
5647 | |
5648 | if (!known_contexts_useful_p (known_contexts)) | |
5649 | { | |
5650 | known_contexts.release (); | |
5651 | known_contexts = vNULL; | |
5652 | } | |
5653 | clone = create_specialized_node (node, known_csts, known_contexts, | |
7b668576 | 5654 | aggvals, callers); |
310bc633 | 5655 | info = IPA_NODE_REF (node); |
eb20b778 MJ |
5656 | info->do_clone_for_all_contexts = false; |
5657 | IPA_NODE_REF (clone)->is_all_contexts_clone = true; | |
310bc633 MJ |
5658 | ret = true; |
5659 | } | |
5e45130d | 5660 | |
310bc633 MJ |
5661 | return ret; |
5662 | } | |
9187e02d | 5663 | |
310bc633 | 5664 | /* Transitively mark all callees of NODE within the same SCC as not dead. */ |
3949c4a7 | 5665 | |
310bc633 MJ |
5666 | static void |
5667 | spread_undeadness (struct cgraph_node *node) | |
5668 | { | |
5669 | struct cgraph_edge *cs; | |
5e45130d | 5670 | |
310bc633 | 5671 | for (cs = node->callees; cs; cs = cs->next_callee) |
4cb13597 | 5672 | if (ipa_edge_within_scc (cs)) |
310bc633 MJ |
5673 | { |
5674 | struct cgraph_node *callee; | |
99b1c316 | 5675 | class ipa_node_params *info; |
129a37fc | 5676 | |
d52f5295 | 5677 | callee = cs->callee->function_symbol (NULL); |
310bc633 | 5678 | info = IPA_NODE_REF (callee); |
5e45130d | 5679 | |
3c4fa8a8 | 5680 | if (info && info->node_dead) |
310bc633 MJ |
5681 | { |
5682 | info->node_dead = 0; | |
5683 | spread_undeadness (callee); | |
5684 | } | |
5685 | } | |
5686 | } | |
5687 | ||
5688 | /* Return true if NODE has a caller from outside of its SCC that is not | |
5689 | dead. Worker callback for cgraph_for_node_and_aliases. */ | |
5690 | ||
5691 | static bool | |
5692 | has_undead_caller_from_outside_scc_p (struct cgraph_node *node, | |
155c9907 | 5693 | void *data ATTRIBUTE_UNUSED) |
310bc633 MJ |
5694 | { |
5695 | struct cgraph_edge *cs; | |
5696 | ||
5697 | for (cs = node->callers; cs; cs = cs->next_caller) | |
67f3791f | 5698 | if (cs->caller->thunk |
d52f5295 ML |
5699 | && cs->caller->call_for_symbol_thunks_and_aliases |
5700 | (has_undead_caller_from_outside_scc_p, NULL, true)) | |
310bc633 | 5701 | return true; |
4cb13597 | 5702 | else if (!ipa_edge_within_scc (cs) |
cbf10ac5 ST |
5703 | && (!IPA_NODE_REF (cs->caller) /* Unoptimized caller. */ |
5704 | || !IPA_NODE_REF (cs->caller)->node_dead)) | |
5705 | return true; | |
310bc633 MJ |
5706 | return false; |
5707 | } | |
5708 | ||
5709 | ||
5710 | /* Identify nodes within the same SCC as NODE which are no longer needed | |
5711 | because of new clones and will be removed as unreachable. */ | |
5712 | ||
5713 | static void | |
5714 | identify_dead_nodes (struct cgraph_node *node) | |
5715 | { | |
5716 | struct cgraph_node *v; | |
155c9907 | 5717 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
87f94429 | 5718 | if (v->local |
3c4fa8a8 | 5719 | && IPA_NODE_REF (v) |
d52f5295 ML |
5720 | && !v->call_for_symbol_thunks_and_aliases |
5721 | (has_undead_caller_from_outside_scc_p, NULL, true)) | |
310bc633 MJ |
5722 | IPA_NODE_REF (v)->node_dead = 1; |
5723 | ||
155c9907 | 5724 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
3c4fa8a8 | 5725 | if (IPA_NODE_REF (v) && !IPA_NODE_REF (v)->node_dead) |
310bc633 MJ |
5726 | spread_undeadness (v); |
5727 | ||
5728 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5729 | { | |
155c9907 | 5730 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
3c4fa8a8 | 5731 | if (IPA_NODE_REF (v) && IPA_NODE_REF (v)->node_dead) |
464d0118 | 5732 | fprintf (dump_file, " Marking node as dead: %s.\n", v->dump_name ()); |
5e45130d | 5733 | } |
310bc633 MJ |
5734 | } |
5735 | ||
5736 | /* The decision stage. Iterate over the topological order of call graph nodes | |
5737 | TOPO and make specialized clones if deemed beneficial. */ | |
5738 | ||
5739 | static void | |
99b1c316 | 5740 | ipcp_decision_stage (class ipa_topo_info *topo) |
310bc633 MJ |
5741 | { |
5742 | int i; | |
5743 | ||
5744 | if (dump_file) | |
5745 | fprintf (dump_file, "\nIPA decision stage:\n\n"); | |
5e45130d | 5746 | |
310bc633 | 5747 | for (i = topo->nnodes - 1; i >= 0; i--) |
5e45130d | 5748 | { |
310bc633 MJ |
5749 | struct cgraph_node *node = topo->order[i]; |
5750 | bool change = false, iterate = true; | |
5751 | ||
5752 | while (iterate) | |
5753 | { | |
5754 | struct cgraph_node *v; | |
5755 | iterate = false; | |
155c9907 | 5756 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
d52f5295 | 5757 | if (v->has_gimple_body_p () |
310bc633 MJ |
5758 | && ipcp_versionable_function_p (v)) |
5759 | iterate |= decide_whether_version_node (v); | |
5760 | ||
5761 | change |= iterate; | |
5762 | } | |
5763 | if (change) | |
5764 | identify_dead_nodes (node); | |
518dc859 | 5765 | } |
518dc859 RL |
5766 | } |
5767 | ||
209ca542 PK |
5768 | /* Look up all the bits information that we have discovered and copy it over |
5769 | to the transformation summary. */ | |
5770 | ||
5771 | static void | |
5772 | ipcp_store_bits_results (void) | |
5773 | { | |
5774 | cgraph_node *node; | |
5775 | ||
5776 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) | |
5777 | { | |
5778 | ipa_node_params *info = IPA_NODE_REF (node); | |
5779 | bool dumped_sth = false; | |
5780 | bool found_useful_result = false; | |
5781 | ||
6cf67b62 | 5782 | if (!opt_for_fn (node->decl, flag_ipa_bit_cp) || !info) |
209ca542 PK |
5783 | { |
5784 | if (dump_file) | |
5785 | fprintf (dump_file, "Not considering %s for ipa bitwise propagation " | |
15bbb5cc | 5786 | "; -fipa-bit-cp: disabled.\n", |
3629ff8a | 5787 | node->dump_name ()); |
209ca542 PK |
5788 | continue; |
5789 | } | |
5790 | ||
5791 | if (info->ipcp_orig_node) | |
5792 | info = IPA_NODE_REF (info->ipcp_orig_node); | |
68188fff MJ |
5793 | if (!info->lattices) |
5794 | /* Newly expanded artificial thunks do not have lattices. */ | |
5795 | continue; | |
209ca542 PK |
5796 | |
5797 | unsigned count = ipa_get_param_count (info); | |
5798 | for (unsigned i = 0; i < count; i++) | |
5799 | { | |
5800 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
5801 | if (plats->bits_lattice.constant_p ()) | |
5802 | { | |
5803 | found_useful_result = true; | |
5804 | break; | |
5805 | } | |
5806 | } | |
5807 | ||
155c9907 JJ |
5808 | if (!found_useful_result) |
5809 | continue; | |
209ca542 | 5810 | |
9d3e0adc ML |
5811 | ipcp_transformation_initialize (); |
5812 | ipcp_transformation *ts = ipcp_transformation_sum->get_create (node); | |
155c9907 | 5813 | vec_safe_reserve_exact (ts->bits, count); |
209ca542 | 5814 | |
155c9907 JJ |
5815 | for (unsigned i = 0; i < count; i++) |
5816 | { | |
5817 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
86cd0334 | 5818 | ipa_bits *jfbits; |
209ca542 | 5819 | |
155c9907 | 5820 | if (plats->bits_lattice.constant_p ()) |
6c2583c1 ML |
5821 | { |
5822 | jfbits | |
5823 | = ipa_get_ipa_bits_for_value (plats->bits_lattice.get_value (), | |
5824 | plats->bits_lattice.get_mask ()); | |
5825 | if (!dbg_cnt (ipa_cp_bits)) | |
5826 | jfbits = NULL; | |
5827 | } | |
155c9907 | 5828 | else |
86cd0334 | 5829 | jfbits = NULL; |
209ca542 | 5830 | |
86cd0334 MJ |
5831 | ts->bits->quick_push (jfbits); |
5832 | if (!dump_file || !jfbits) | |
155c9907 JJ |
5833 | continue; |
5834 | if (!dumped_sth) | |
5835 | { | |
464d0118 ML |
5836 | fprintf (dump_file, "Propagated bits info for function %s:\n", |
5837 | node->dump_name ()); | |
155c9907 JJ |
5838 | dumped_sth = true; |
5839 | } | |
5840 | fprintf (dump_file, " param %i: value = ", i); | |
86cd0334 | 5841 | print_hex (jfbits->value, dump_file); |
155c9907 | 5842 | fprintf (dump_file, ", mask = "); |
86cd0334 | 5843 | print_hex (jfbits->mask, dump_file); |
155c9907 JJ |
5844 | fprintf (dump_file, "\n"); |
5845 | } | |
209ca542 PK |
5846 | } |
5847 | } | |
8bc5448f KV |
5848 | |
5849 | /* Look up all VR information that we have discovered and copy it over | |
5850 | to the transformation summary. */ | |
5851 | ||
5852 | static void | |
5853 | ipcp_store_vr_results (void) | |
5854 | { | |
5855 | cgraph_node *node; | |
5856 | ||
5857 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) | |
155c9907 JJ |
5858 | { |
5859 | ipa_node_params *info = IPA_NODE_REF (node); | |
5860 | bool found_useful_result = false; | |
8bc5448f | 5861 | |
a09ccc22 | 5862 | if (!info || !opt_for_fn (node->decl, flag_ipa_vrp)) |
155c9907 JJ |
5863 | { |
5864 | if (dump_file) | |
5865 | fprintf (dump_file, "Not considering %s for VR discovery " | |
5866 | "and propagate; -fipa-ipa-vrp: disabled.\n", | |
3629ff8a | 5867 | node->dump_name ()); |
155c9907 JJ |
5868 | continue; |
5869 | } | |
8bc5448f | 5870 | |
155c9907 JJ |
5871 | if (info->ipcp_orig_node) |
5872 | info = IPA_NODE_REF (info->ipcp_orig_node); | |
68188fff MJ |
5873 | if (!info->lattices) |
5874 | /* Newly expanded artificial thunks do not have lattices. */ | |
5875 | continue; | |
8bc5448f | 5876 | |
155c9907 JJ |
5877 | unsigned count = ipa_get_param_count (info); |
5878 | for (unsigned i = 0; i < count; i++) | |
5879 | { | |
5880 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
5881 | if (!plats->m_value_range.bottom_p () | |
5882 | && !plats->m_value_range.top_p ()) | |
5883 | { | |
5884 | found_useful_result = true; | |
5885 | break; | |
5886 | } | |
5887 | } | |
5888 | if (!found_useful_result) | |
5889 | continue; | |
8bc5448f | 5890 | |
9d3e0adc ML |
5891 | ipcp_transformation_initialize (); |
5892 | ipcp_transformation *ts = ipcp_transformation_sum->get_create (node); | |
155c9907 | 5893 | vec_safe_reserve_exact (ts->m_vr, count); |
8bc5448f | 5894 | |
155c9907 JJ |
5895 | for (unsigned i = 0; i < count; i++) |
5896 | { | |
5897 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
5898 | ipa_vr vr; | |
8bc5448f | 5899 | |
155c9907 | 5900 | if (!plats->m_value_range.bottom_p () |
86deadf8 MJ |
5901 | && !plats->m_value_range.top_p () |
5902 | && dbg_cnt (ipa_cp_vr)) | |
155c9907 JJ |
5903 | { |
5904 | vr.known = true; | |
54994253 AH |
5905 | vr.type = plats->m_value_range.m_vr.kind (); |
5906 | vr.min = wi::to_wide (plats->m_value_range.m_vr.min ()); | |
5907 | vr.max = wi::to_wide (plats->m_value_range.m_vr.max ()); | |
155c9907 JJ |
5908 | } |
5909 | else | |
5910 | { | |
5911 | vr.known = false; | |
5912 | vr.type = VR_VARYING; | |
5913 | vr.min = vr.max = wi::zero (INT_TYPE_SIZE); | |
5914 | } | |
5915 | ts->m_vr->quick_push (vr); | |
5916 | } | |
5917 | } | |
8bc5448f KV |
5918 | } |
5919 | ||
518dc859 | 5920 | /* The IPCP driver. */ |
310bc633 | 5921 | |
3cc1cccc | 5922 | static unsigned int |
518dc859 RL |
5923 | ipcp_driver (void) |
5924 | { | |
99b1c316 | 5925 | class ipa_topo_info topo; |
310bc633 | 5926 | |
1ac2bdb4 ML |
5927 | if (edge_clone_summaries == NULL) |
5928 | edge_clone_summaries = new edge_clone_summary_t (symtab); | |
5929 | ||
310bc633 MJ |
5930 | ipa_check_create_node_params (); |
5931 | ipa_check_create_edge_args (); | |
9e0b0ec3 | 5932 | clone_num_suffixes = new hash_map<const char *, unsigned>; |
aef83682 | 5933 | |
518dc859 RL |
5934 | if (dump_file) |
5935 | { | |
ca30a539 JH |
5936 | fprintf (dump_file, "\nIPA structures before propagation:\n"); |
5937 | if (dump_flags & TDF_DETAILS) | |
155c9907 | 5938 | ipa_print_all_params (dump_file); |
ca30a539 | 5939 | ipa_print_all_jump_functions (dump_file); |
518dc859 | 5940 | } |
310bc633 MJ |
5941 | |
5942 | /* Topological sort. */ | |
5943 | build_toporder_info (&topo); | |
5944 | /* Do the interprocedural propagation. */ | |
5945 | ipcp_propagate_stage (&topo); | |
5946 | /* Decide what constant propagation and cloning should be performed. */ | |
5947 | ipcp_decision_stage (&topo); | |
209ca542 PK |
5948 | /* Store results of bits propagation. */ |
5949 | ipcp_store_bits_results (); | |
8bc5448f KV |
5950 | /* Store results of value range propagation. */ |
5951 | ipcp_store_vr_results (); | |
310bc633 | 5952 | |
518dc859 | 5953 | /* Free all IPCP structures. */ |
53aedcce | 5954 | delete clone_num_suffixes; |
310bc633 | 5955 | free_toporder_info (&topo); |
1ac2bdb4 | 5956 | delete edge_clone_summaries; |
e67343d7 | 5957 | edge_clone_summaries = NULL; |
e33c6cd6 | 5958 | ipa_free_all_structures_after_ipa_cp (); |
518dc859 RL |
5959 | if (dump_file) |
5960 | fprintf (dump_file, "\nIPA constant propagation end\n"); | |
c2924966 | 5961 | return 0; |
518dc859 RL |
5962 | } |
5963 | ||
3949c4a7 MJ |
5964 | /* Initialization and computation of IPCP data structures. This is the initial |
5965 | intraprocedural analysis of functions, which gathers information to be | |
5966 | propagated later on. */ | |
5967 | ||
129a37fc JH |
5968 | static void |
5969 | ipcp_generate_summary (void) | |
5970 | { | |
3949c4a7 MJ |
5971 | struct cgraph_node *node; |
5972 | ||
129a37fc JH |
5973 | if (dump_file) |
5974 | fprintf (dump_file, "\nIPA constant propagation start:\n"); | |
129a37fc | 5975 | ipa_register_cgraph_hooks (); |
3949c4a7 | 5976 | |
c47d0034 | 5977 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) |
7e729474 | 5978 | ipa_analyze_node (node); |
129a37fc JH |
5979 | } |
5980 | ||
27a4cd48 DM |
5981 | namespace { |
5982 | ||
5983 | const pass_data pass_data_ipa_cp = | |
5984 | { | |
5985 | IPA_PASS, /* type */ | |
5986 | "cp", /* name */ | |
5987 | OPTGROUP_NONE, /* optinfo_flags */ | |
27a4cd48 DM |
5988 | TV_IPA_CONSTANT_PROP, /* tv_id */ |
5989 | 0, /* properties_required */ | |
5990 | 0, /* properties_provided */ | |
5991 | 0, /* properties_destroyed */ | |
5992 | 0, /* todo_flags_start */ | |
5993 | ( TODO_dump_symtab | TODO_remove_functions ), /* todo_flags_finish */ | |
518dc859 | 5994 | }; |
27a4cd48 DM |
5995 | |
5996 | class pass_ipa_cp : public ipa_opt_pass_d | |
5997 | { | |
5998 | public: | |
c3284718 RS |
5999 | pass_ipa_cp (gcc::context *ctxt) |
6000 | : ipa_opt_pass_d (pass_data_ipa_cp, ctxt, | |
6001 | ipcp_generate_summary, /* generate_summary */ | |
568de14d ML |
6002 | NULL, /* write_summary */ |
6003 | NULL, /* read_summary */ | |
04be694e | 6004 | ipcp_write_transformation_summaries, /* |
c3284718 | 6005 | write_optimization_summary */ |
04be694e | 6006 | ipcp_read_transformation_summaries, /* |
c3284718 RS |
6007 | read_optimization_summary */ |
6008 | NULL, /* stmt_fixup */ | |
6009 | 0, /* function_transform_todo_flags_start */ | |
6010 | ipcp_transform_function, /* function_transform */ | |
6011 | NULL) /* variable_transform */ | |
27a4cd48 DM |
6012 | {} |
6013 | ||
6014 | /* opt_pass methods: */ | |
1a3d085c TS |
6015 | virtual bool gate (function *) |
6016 | { | |
6017 | /* FIXME: We should remove the optimize check after we ensure we never run | |
6018 | IPA passes when not optimizing. */ | |
2bf86c84 | 6019 | return (flag_ipa_cp && optimize) || in_lto_p; |
1a3d085c TS |
6020 | } |
6021 | ||
be55bfe6 | 6022 | virtual unsigned int execute (function *) { return ipcp_driver (); } |
27a4cd48 DM |
6023 | |
6024 | }; // class pass_ipa_cp | |
6025 | ||
6026 | } // anon namespace | |
6027 | ||
6028 | ipa_opt_pass_d * | |
6029 | make_pass_ipa_cp (gcc::context *ctxt) | |
6030 | { | |
6031 | return new pass_ipa_cp (ctxt); | |
6032 | } | |
3edf64aa DM |
6033 | |
6034 | /* Reset all state within ipa-cp.c so that we can rerun the compiler | |
6035 | within the same process. For use by toplev::finalize. */ | |
6036 | ||
6037 | void | |
6038 | ipa_cp_c_finalize (void) | |
6039 | { | |
e7a74006 | 6040 | max_count = profile_count::uninitialized (); |
3edf64aa | 6041 | overall_size = 0; |
f7725a48 | 6042 | orig_overall_size = 0; |
12e088ba | 6043 | ipcp_free_transformation_sum (); |
3edf64aa | 6044 | } |