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518dc859 | 1 | /* Interprocedural constant propagation |
8d9254fc | 2 | Copyright (C) 2005-2020 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" | |
518dc859 | 126 | |
c0cb5055 | 127 | template <typename valtype> class ipcp_value; |
ca30a539 | 128 | |
310bc633 | 129 | /* Describes a particular source for an IPA-CP value. */ |
ca30a539 | 130 | |
c0cb5055 | 131 | template <typename valtype> |
6c1dae73 | 132 | struct ipcp_value_source |
310bc633 | 133 | { |
c0cb5055 | 134 | public: |
2c9561b5 MJ |
135 | /* Aggregate offset of the source, negative if the source is scalar value of |
136 | the argument itself. */ | |
137 | HOST_WIDE_INT offset; | |
310bc633 | 138 | /* The incoming edge that brought the value. */ |
c0cb5055 | 139 | cgraph_edge *cs; |
310bc633 MJ |
140 | /* If the jump function that resulted into his value was a pass-through or an |
141 | ancestor, this is the ipcp_value of the caller from which the described | |
142 | value has been derived. Otherwise it is NULL. */ | |
c0cb5055 | 143 | ipcp_value<valtype> *val; |
310bc633 | 144 | /* Next pointer in a linked list of sources of a value. */ |
c0cb5055 | 145 | ipcp_value_source *next; |
310bc633 MJ |
146 | /* If the jump function that resulted into his value was a pass-through or an |
147 | ancestor, this is the index of the parameter of the caller the jump | |
148 | function references. */ | |
149 | int index; | |
150 | }; | |
ca30a539 | 151 | |
c0cb5055 MJ |
152 | /* Common ancestor for all ipcp_value instantiations. */ |
153 | ||
154 | class ipcp_value_base | |
155 | { | |
156 | public: | |
157 | /* Time benefit and size cost that specializing the function for this value | |
158 | would bring about in this function alone. */ | |
159 | int local_time_benefit, local_size_cost; | |
160 | /* Time benefit and size cost that specializing the function for this value | |
161 | can bring about in it's callees (transitively). */ | |
162 | int prop_time_benefit, prop_size_cost; | |
c8fb20d8 YG |
163 | |
164 | ipcp_value_base () | |
165 | : local_time_benefit (0), local_size_cost (0), | |
166 | prop_time_benefit (0), prop_size_cost (0) {} | |
c0cb5055 MJ |
167 | }; |
168 | ||
310bc633 | 169 | /* Describes one particular value stored in struct ipcp_lattice. */ |
ca30a539 | 170 | |
c0cb5055 MJ |
171 | template <typename valtype> |
172 | class ipcp_value : public ipcp_value_base | |
518dc859 | 173 | { |
c0cb5055 MJ |
174 | public: |
175 | /* The actual value for the given parameter. */ | |
176 | valtype value; | |
310bc633 | 177 | /* The list of sources from which this value originates. */ |
c0cb5055 | 178 | ipcp_value_source <valtype> *sources; |
310bc633 | 179 | /* Next pointers in a linked list of all values in a lattice. */ |
c0cb5055 | 180 | ipcp_value *next; |
310bc633 MJ |
181 | /* Next pointers in a linked list of values in a strongly connected component |
182 | of values. */ | |
c0cb5055 | 183 | ipcp_value *scc_next; |
310bc633 MJ |
184 | /* Next pointers in a linked list of SCCs of values sorted topologically |
185 | according their sources. */ | |
c0cb5055 | 186 | ipcp_value *topo_next; |
310bc633 MJ |
187 | /* A specialized node created for this value, NULL if none has been (so far) |
188 | created. */ | |
c0cb5055 | 189 | cgraph_node *spec_node; |
310bc633 MJ |
190 | /* Depth first search number and low link for topological sorting of |
191 | values. */ | |
192 | int dfs, low_link; | |
f25ae20e | 193 | /* True if this value is currently on the topo-sort stack. */ |
310bc633 | 194 | bool on_stack; |
c0cb5055 | 195 | |
c8fb20d8 YG |
196 | ipcp_value() |
197 | : sources (0), next (0), scc_next (0), topo_next (0), | |
198 | spec_node (0), dfs (0), low_link (0), on_stack (false) {} | |
199 | ||
c0cb5055 MJ |
200 | void add_source (cgraph_edge *cs, ipcp_value *src_val, int src_idx, |
201 | HOST_WIDE_INT offset); | |
310bc633 | 202 | }; |
518dc859 | 203 | |
2c9561b5 | 204 | /* Lattice describing potential values of a formal parameter of a function, or |
5764ee3c | 205 | a part of an aggregate. TOP is represented by a lattice with zero values |
2c9561b5 MJ |
206 | and with contains_variable and bottom flags cleared. BOTTOM is represented |
207 | by a lattice with the bottom flag set. In that case, values and | |
310bc633 MJ |
208 | contains_variable flag should be disregarded. */ |
209 | ||
c0cb5055 | 210 | template <typename valtype> |
6c1dae73 | 211 | struct ipcp_lattice |
518dc859 | 212 | { |
c0cb5055 | 213 | public: |
310bc633 MJ |
214 | /* The list of known values and types in this lattice. Note that values are |
215 | not deallocated if a lattice is set to bottom because there may be value | |
216 | sources referencing them. */ | |
c0cb5055 | 217 | ipcp_value<valtype> *values; |
310bc633 MJ |
218 | /* Number of known values and types in this lattice. */ |
219 | int values_count; | |
2c9561b5 | 220 | /* The lattice contains a variable component (in addition to values). */ |
310bc633 MJ |
221 | bool contains_variable; |
222 | /* The value of the lattice is bottom (i.e. variable and unusable for any | |
223 | propagation). */ | |
224 | bool bottom; | |
c0cb5055 MJ |
225 | |
226 | inline bool is_single_const (); | |
227 | inline bool set_to_bottom (); | |
228 | inline bool set_contains_variable (); | |
229 | bool add_value (valtype newval, cgraph_edge *cs, | |
230 | ipcp_value<valtype> *src_val = NULL, | |
9b14fc33 FX |
231 | int src_idx = 0, HOST_WIDE_INT offset = -1, |
232 | ipcp_value<valtype> **val_p = NULL, | |
233 | bool unlimited = false); | |
c0cb5055 | 234 | void print (FILE * f, bool dump_sources, bool dump_benefits); |
2c9561b5 MJ |
235 | }; |
236 | ||
c0cb5055 MJ |
237 | /* Lattice of tree values with an offset to describe a part of an |
238 | aggregate. */ | |
2c9561b5 | 239 | |
6c1dae73 | 240 | struct ipcp_agg_lattice : public ipcp_lattice<tree> |
2c9561b5 | 241 | { |
c0cb5055 | 242 | public: |
2c9561b5 MJ |
243 | /* Offset that is being described by this lattice. */ |
244 | HOST_WIDE_INT offset; | |
245 | /* Size so that we don't have to re-compute it every time we traverse the | |
246 | list. Must correspond to TYPE_SIZE of all lat values. */ | |
247 | HOST_WIDE_INT size; | |
248 | /* Next element of the linked list. */ | |
249 | struct ipcp_agg_lattice *next; | |
250 | }; | |
251 | ||
209ca542 PK |
252 | /* Lattice of known bits, only capable of holding one value. |
253 | Bitwise constant propagation propagates which bits of a | |
254 | value are constant. | |
255 | For eg: | |
256 | int f(int x) | |
257 | { | |
258 | return some_op (x); | |
259 | } | |
260 | ||
261 | int f1(int y) | |
262 | { | |
263 | if (cond) | |
264 | return f (y & 0xff); | |
265 | else | |
266 | return f (y & 0xf); | |
267 | } | |
268 | ||
269 | In the above case, the param 'x' will always have all | |
270 | the bits (except the bits in lsb) set to 0. | |
271 | Hence the mask of 'x' would be 0xff. The mask | |
272 | reflects that the bits in lsb are unknown. | |
273 | The actual propagated value is given by m_value & ~m_mask. */ | |
274 | ||
275 | class ipcp_bits_lattice | |
276 | { | |
277 | public: | |
278 | bool bottom_p () { return m_lattice_val == IPA_BITS_VARYING; } | |
279 | bool top_p () { return m_lattice_val == IPA_BITS_UNDEFINED; } | |
280 | bool constant_p () { return m_lattice_val == IPA_BITS_CONSTANT; } | |
281 | bool set_to_bottom (); | |
155c9907 JJ |
282 | bool set_to_constant (widest_int, widest_int); |
283 | ||
209ca542 PK |
284 | widest_int get_value () { return m_value; } |
285 | widest_int get_mask () { return m_mask; } | |
286 | ||
287 | bool meet_with (ipcp_bits_lattice& other, unsigned, signop, | |
288 | enum tree_code, tree); | |
289 | ||
290 | bool meet_with (widest_int, widest_int, unsigned); | |
291 | ||
292 | void print (FILE *); | |
293 | ||
294 | private: | |
295 | enum { IPA_BITS_UNDEFINED, IPA_BITS_CONSTANT, IPA_BITS_VARYING } m_lattice_val; | |
296 | ||
297 | /* Similar to ccp_lattice_t, mask represents which bits of value are constant. | |
298 | If a bit in mask is set to 0, then the corresponding bit in | |
299 | value is known to be constant. */ | |
300 | widest_int m_value, m_mask; | |
301 | ||
155c9907 | 302 | bool meet_with_1 (widest_int, widest_int, unsigned); |
209ca542 | 303 | void get_value_and_mask (tree, widest_int *, widest_int *); |
155c9907 | 304 | }; |
209ca542 | 305 | |
8bc5448f KV |
306 | /* Lattice of value ranges. */ |
307 | ||
308 | class ipcp_vr_lattice | |
309 | { | |
310 | public: | |
028d81b1 | 311 | value_range m_vr; |
8bc5448f KV |
312 | |
313 | inline bool bottom_p () const; | |
314 | inline bool top_p () const; | |
315 | inline bool set_to_bottom (); | |
028d81b1 | 316 | bool meet_with (const value_range *p_vr); |
8bc5448f | 317 | bool meet_with (const ipcp_vr_lattice &other); |
54994253 | 318 | void init () { gcc_assert (m_vr.undefined_p ()); } |
8bc5448f KV |
319 | void print (FILE * f); |
320 | ||
321 | private: | |
028d81b1 | 322 | bool meet_with_1 (const value_range *other_vr); |
8bc5448f KV |
323 | }; |
324 | ||
2c9561b5 MJ |
325 | /* Structure containing lattices for a parameter itself and for pieces of |
326 | aggregates that are passed in the parameter or by a reference in a parameter | |
327 | plus some other useful flags. */ | |
328 | ||
c0cb5055 | 329 | class ipcp_param_lattices |
2c9561b5 | 330 | { |
c0cb5055 | 331 | public: |
2c9561b5 | 332 | /* Lattice describing the value of the parameter itself. */ |
c0cb5055 | 333 | ipcp_lattice<tree> itself; |
026c3cfd | 334 | /* Lattice describing the polymorphic contexts of a parameter. */ |
44210a96 | 335 | ipcp_lattice<ipa_polymorphic_call_context> ctxlat; |
2c9561b5 | 336 | /* Lattices describing aggregate parts. */ |
c0cb5055 | 337 | ipcp_agg_lattice *aggs; |
209ca542 PK |
338 | /* Lattice describing known bits. */ |
339 | ipcp_bits_lattice bits_lattice; | |
8bc5448f KV |
340 | /* Lattice describing value range. */ |
341 | ipcp_vr_lattice m_value_range; | |
2c9561b5 MJ |
342 | /* Number of aggregate lattices */ |
343 | int aggs_count; | |
344 | /* True if aggregate data were passed by reference (as opposed to by | |
345 | value). */ | |
346 | bool aggs_by_ref; | |
347 | /* All aggregate lattices contain a variable component (in addition to | |
348 | values). */ | |
349 | bool aggs_contain_variable; | |
350 | /* The value of all aggregate lattices is bottom (i.e. variable and unusable | |
351 | for any propagation). */ | |
352 | bool aggs_bottom; | |
353 | ||
310bc633 MJ |
354 | /* There is a virtual call based on this parameter. */ |
355 | bool virt_call; | |
356 | }; | |
518dc859 | 357 | |
2c9561b5 MJ |
358 | /* Allocation pools for values and their sources in ipa-cp. */ |
359 | ||
fb0b2914 | 360 | object_allocator<ipcp_value<tree> > ipcp_cst_values_pool |
fcb87c50 | 361 | ("IPA-CP constant values"); |
2651e637 | 362 | |
fb0b2914 | 363 | object_allocator<ipcp_value<ipa_polymorphic_call_context> > |
fcb87c50 | 364 | ipcp_poly_ctx_values_pool ("IPA-CP polymorphic contexts"); |
2651e637 | 365 | |
fb0b2914 | 366 | object_allocator<ipcp_value_source<tree> > ipcp_sources_pool |
fcb87c50 | 367 | ("IPA-CP value sources"); |
2651e637 | 368 | |
fb0b2914 | 369 | object_allocator<ipcp_agg_lattice> ipcp_agg_lattice_pool |
fcb87c50 | 370 | ("IPA_CP aggregate lattices"); |
2c9561b5 | 371 | |
310bc633 MJ |
372 | /* Maximal count found in program. */ |
373 | ||
3995f3a2 | 374 | static profile_count max_count; |
310bc633 MJ |
375 | |
376 | /* Original overall size of the program. */ | |
377 | ||
f7725a48 | 378 | static long overall_size, orig_overall_size; |
310bc633 | 379 | |
9e0b0ec3 MP |
380 | /* Node name to unique clone suffix number map. */ |
381 | static hash_map<const char *, unsigned> *clone_num_suffixes; | |
53aedcce | 382 | |
2c9561b5 MJ |
383 | /* Return the param lattices structure corresponding to the Ith formal |
384 | parameter of the function described by INFO. */ | |
99b1c316 MS |
385 | static inline class ipcp_param_lattices * |
386 | ipa_get_parm_lattices (class ipa_node_params *info, int i) | |
518dc859 | 387 | { |
d7da5cc8 | 388 | gcc_assert (i >= 0 && i < ipa_get_param_count (info)); |
310bc633 MJ |
389 | gcc_checking_assert (!info->ipcp_orig_node); |
390 | gcc_checking_assert (info->lattices); | |
391 | return &(info->lattices[i]); | |
518dc859 RL |
392 | } |
393 | ||
2c9561b5 MJ |
394 | /* Return the lattice corresponding to the scalar value of the Ith formal |
395 | parameter of the function described by INFO. */ | |
c0cb5055 | 396 | static inline ipcp_lattice<tree> * |
99b1c316 | 397 | ipa_get_scalar_lat (class ipa_node_params *info, int i) |
2c9561b5 | 398 | { |
99b1c316 | 399 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
2c9561b5 MJ |
400 | return &plats->itself; |
401 | } | |
402 | ||
44210a96 MJ |
403 | /* Return the lattice corresponding to the scalar value of the Ith formal |
404 | parameter of the function described by INFO. */ | |
405 | static inline ipcp_lattice<ipa_polymorphic_call_context> * | |
99b1c316 | 406 | ipa_get_poly_ctx_lat (class ipa_node_params *info, int i) |
44210a96 | 407 | { |
99b1c316 | 408 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
44210a96 MJ |
409 | return &plats->ctxlat; |
410 | } | |
411 | ||
310bc633 MJ |
412 | /* Return whether LAT is a lattice with a single constant and without an |
413 | undefined value. */ | |
414 | ||
c0cb5055 MJ |
415 | template <typename valtype> |
416 | inline bool | |
417 | ipcp_lattice<valtype>::is_single_const () | |
518dc859 | 418 | { |
c0cb5055 | 419 | if (bottom || contains_variable || values_count != 1) |
518dc859 | 420 | return false; |
310bc633 MJ |
421 | else |
422 | return true; | |
518dc859 RL |
423 | } |
424 | ||
310bc633 MJ |
425 | /* Print V which is extracted from a value in a lattice to F. */ |
426 | ||
518dc859 | 427 | static void |
310bc633 | 428 | print_ipcp_constant_value (FILE * f, tree v) |
518dc859 | 429 | { |
3b97a5c7 | 430 | if (TREE_CODE (v) == ADDR_EXPR |
155c9907 | 431 | && TREE_CODE (TREE_OPERAND (v, 0)) == CONST_DECL) |
518dc859 | 432 | { |
310bc633 | 433 | fprintf (f, "& "); |
ef6cb4c7 | 434 | print_generic_expr (f, DECL_INITIAL (TREE_OPERAND (v, 0))); |
518dc859 | 435 | } |
310bc633 | 436 | else |
ef6cb4c7 | 437 | print_generic_expr (f, v); |
518dc859 RL |
438 | } |
439 | ||
44210a96 MJ |
440 | /* Print V which is extracted from a value in a lattice to F. */ |
441 | ||
442 | static void | |
443 | print_ipcp_constant_value (FILE * f, ipa_polymorphic_call_context v) | |
444 | { | |
445 | v.dump(f, false); | |
446 | } | |
447 | ||
2c9561b5 MJ |
448 | /* Print a lattice LAT to F. */ |
449 | ||
c0cb5055 MJ |
450 | template <typename valtype> |
451 | void | |
452 | ipcp_lattice<valtype>::print (FILE * f, bool dump_sources, bool dump_benefits) | |
2c9561b5 | 453 | { |
c0cb5055 | 454 | ipcp_value<valtype> *val; |
2c9561b5 MJ |
455 | bool prev = false; |
456 | ||
c0cb5055 | 457 | if (bottom) |
2c9561b5 MJ |
458 | { |
459 | fprintf (f, "BOTTOM\n"); | |
460 | return; | |
461 | } | |
462 | ||
c0cb5055 | 463 | if (!values_count && !contains_variable) |
2c9561b5 MJ |
464 | { |
465 | fprintf (f, "TOP\n"); | |
466 | return; | |
467 | } | |
468 | ||
c0cb5055 | 469 | if (contains_variable) |
2c9561b5 MJ |
470 | { |
471 | fprintf (f, "VARIABLE"); | |
472 | prev = true; | |
473 | if (dump_benefits) | |
474 | fprintf (f, "\n"); | |
475 | } | |
476 | ||
c0cb5055 | 477 | for (val = values; val; val = val->next) |
2c9561b5 MJ |
478 | { |
479 | if (dump_benefits && prev) | |
480 | fprintf (f, " "); | |
481 | else if (!dump_benefits && prev) | |
482 | fprintf (f, ", "); | |
483 | else | |
484 | prev = true; | |
485 | ||
486 | print_ipcp_constant_value (f, val->value); | |
487 | ||
488 | if (dump_sources) | |
489 | { | |
c0cb5055 | 490 | ipcp_value_source<valtype> *s; |
2c9561b5 MJ |
491 | |
492 | fprintf (f, " [from:"); | |
493 | for (s = val->sources; s; s = s->next) | |
e3951b03 JH |
494 | fprintf (f, " %i(%f)", s->cs->caller->order, |
495 | s->cs->sreal_frequency ().to_double ()); | |
2c9561b5 MJ |
496 | fprintf (f, "]"); |
497 | } | |
498 | ||
499 | if (dump_benefits) | |
500 | fprintf (f, " [loc_time: %i, loc_size: %i, " | |
501 | "prop_time: %i, prop_size: %i]\n", | |
502 | val->local_time_benefit, val->local_size_cost, | |
503 | val->prop_time_benefit, val->prop_size_cost); | |
504 | } | |
505 | if (!dump_benefits) | |
506 | fprintf (f, "\n"); | |
507 | } | |
508 | ||
209ca542 PK |
509 | void |
510 | ipcp_bits_lattice::print (FILE *f) | |
511 | { | |
512 | if (top_p ()) | |
513 | fprintf (f, " Bits unknown (TOP)\n"); | |
514 | else if (bottom_p ()) | |
515 | fprintf (f, " Bits unusable (BOTTOM)\n"); | |
516 | else | |
517 | { | |
518 | fprintf (f, " Bits: value = "); print_hex (get_value (), f); | |
519 | fprintf (f, ", mask = "); print_hex (get_mask (), f); | |
520 | fprintf (f, "\n"); | |
521 | } | |
522 | } | |
523 | ||
8bc5448f KV |
524 | /* Print value range lattice to F. */ |
525 | ||
526 | void | |
527 | ipcp_vr_lattice::print (FILE * f) | |
528 | { | |
c49eeac3 | 529 | dump_value_range (f, &m_vr); |
8bc5448f KV |
530 | } |
531 | ||
c43f07af | 532 | /* Print all ipcp_lattices of all functions to F. */ |
310bc633 | 533 | |
518dc859 | 534 | static void |
310bc633 | 535 | print_all_lattices (FILE * f, bool dump_sources, bool dump_benefits) |
518dc859 RL |
536 | { |
537 | struct cgraph_node *node; | |
538 | int i, count; | |
3cc1cccc | 539 | |
310bc633 MJ |
540 | fprintf (f, "\nLattices:\n"); |
541 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) | |
518dc859 | 542 | { |
99b1c316 | 543 | class ipa_node_params *info; |
0eae6bab | 544 | |
0eae6bab | 545 | info = IPA_NODE_REF (node); |
48182bd6 MJ |
546 | /* Skip unoptimized functions and constprop clones since we don't make |
547 | lattices for them. */ | |
548 | if (!info || info->ipcp_orig_node) | |
9ee46552 | 549 | continue; |
464d0118 | 550 | fprintf (f, " Node: %s:\n", node->dump_name ()); |
c43f07af | 551 | count = ipa_get_param_count (info); |
518dc859 RL |
552 | for (i = 0; i < count; i++) |
553 | { | |
2c9561b5 | 554 | struct ipcp_agg_lattice *aglat; |
99b1c316 | 555 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
ca30a539 | 556 | fprintf (f, " param [%d]: ", i); |
c0cb5055 | 557 | plats->itself.print (f, dump_sources, dump_benefits); |
44210a96 MJ |
558 | fprintf (f, " ctxs: "); |
559 | plats->ctxlat.print (f, dump_sources, dump_benefits); | |
209ca542 | 560 | plats->bits_lattice.print (f); |
8bc5448f KV |
561 | fprintf (f, " "); |
562 | plats->m_value_range.print (f); | |
563 | fprintf (f, "\n"); | |
2c9561b5 MJ |
564 | if (plats->virt_call) |
565 | fprintf (f, " virt_call flag set\n"); | |
566 | ||
567 | if (plats->aggs_bottom) | |
310bc633 | 568 | { |
2c9561b5 | 569 | fprintf (f, " AGGS BOTTOM\n"); |
310bc633 MJ |
570 | continue; |
571 | } | |
2c9561b5 MJ |
572 | if (plats->aggs_contain_variable) |
573 | fprintf (f, " AGGS VARIABLE\n"); | |
574 | for (aglat = plats->aggs; aglat; aglat = aglat->next) | |
310bc633 | 575 | { |
2c9561b5 MJ |
576 | fprintf (f, " %soffset " HOST_WIDE_INT_PRINT_DEC ": ", |
577 | plats->aggs_by_ref ? "ref " : "", aglat->offset); | |
c0cb5055 | 578 | aglat->print (f, dump_sources, dump_benefits); |
310bc633 | 579 | } |
518dc859 RL |
580 | } |
581 | } | |
582 | } | |
583 | ||
310bc633 MJ |
584 | /* Determine whether it is at all technically possible to create clones of NODE |
585 | and store this information in the ipa_node_params structure associated | |
586 | with NODE. */ | |
27dbd3ac | 587 | |
310bc633 | 588 | static void |
7e729474 | 589 | determine_versionability (struct cgraph_node *node, |
99b1c316 | 590 | class ipa_node_params *info) |
27dbd3ac | 591 | { |
310bc633 | 592 | const char *reason = NULL; |
0818c24c | 593 | |
aa229804 MJ |
594 | /* There are a number of generic reasons functions cannot be versioned. We |
595 | also cannot remove parameters if there are type attributes such as fnspec | |
596 | present. */ | |
67348ccc | 597 | if (node->alias || node->thunk.thunk_p) |
310bc633 | 598 | reason = "alias or thunk"; |
87f94429 | 599 | else if (!node->versionable) |
d7da5cc8 | 600 | reason = "not a tree_versionable_function"; |
d52f5295 | 601 | else if (node->get_availability () <= AVAIL_INTERPOSABLE) |
310bc633 | 602 | reason = "insufficient body availability"; |
d31d42c7 JJ |
603 | else if (!opt_for_fn (node->decl, optimize) |
604 | || !opt_for_fn (node->decl, flag_ipa_cp)) | |
605 | reason = "non-optimized function"; | |
0136f8f0 AH |
606 | else if (lookup_attribute ("omp declare simd", DECL_ATTRIBUTES (node->decl))) |
607 | { | |
608 | /* Ideally we should clone the SIMD clones themselves and create | |
609 | vector copies of them, so IPA-cp and SIMD clones can happily | |
610 | coexist, but that may not be worth the effort. */ | |
611 | reason = "function has SIMD clones"; | |
612 | } | |
58b3986e ES |
613 | else if (lookup_attribute ("target_clones", DECL_ATTRIBUTES (node->decl))) |
614 | { | |
615 | /* Ideally we should clone the target clones themselves and create | |
616 | copies of them, so IPA-cp and target clones can happily | |
617 | coexist, but that may not be worth the effort. */ | |
618 | reason = "function target_clones attribute"; | |
619 | } | |
1f26ac87 JM |
620 | /* Don't clone decls local to a comdat group; it breaks and for C++ |
621 | decloned constructors, inlining is always better anyway. */ | |
d52f5295 | 622 | else if (node->comdat_local_p ()) |
1f26ac87 | 623 | reason = "comdat-local function"; |
58928b35 ML |
624 | else if (node->calls_comdat_local) |
625 | { | |
626 | /* TODO: call is versionable if we make sure that all | |
627 | callers are inside of a comdat group. */ | |
628 | reason = "calls comdat-local function"; | |
629 | } | |
27dbd3ac | 630 | |
ea49d40b | 631 | /* Functions calling BUILT_IN_VA_ARG_PACK and BUILT_IN_VA_ARG_PACK_LEN |
5d4991da JH |
632 | work only when inlined. Cloning them may still lead to better code |
633 | because ipa-cp will not give up on cloning further. If the function is | |
634 | external this however leads to wrong code because we may end up producing | |
ea49d40b JH |
635 | offline copy of the function. */ |
636 | if (DECL_EXTERNAL (node->decl)) | |
637 | for (cgraph_edge *edge = node->callees; !reason && edge; | |
638 | edge = edge->next_callee) | |
3d78e008 | 639 | if (fndecl_built_in_p (edge->callee->decl, BUILT_IN_NORMAL)) |
ea49d40b JH |
640 | { |
641 | if (DECL_FUNCTION_CODE (edge->callee->decl) == BUILT_IN_VA_ARG_PACK) | |
642 | reason = "external function which calls va_arg_pack"; | |
643 | if (DECL_FUNCTION_CODE (edge->callee->decl) | |
644 | == BUILT_IN_VA_ARG_PACK_LEN) | |
645 | reason = "external function which calls va_arg_pack_len"; | |
646 | } | |
647 | ||
67348ccc | 648 | if (reason && dump_file && !node->alias && !node->thunk.thunk_p) |
464d0118 ML |
649 | fprintf (dump_file, "Function %s is not versionable, reason: %s.\n", |
650 | node->dump_name (), reason); | |
27dbd3ac | 651 | |
7e729474 | 652 | info->versionable = (reason == NULL); |
27dbd3ac RH |
653 | } |
654 | ||
310bc633 MJ |
655 | /* Return true if it is at all technically possible to create clones of a |
656 | NODE. */ | |
657 | ||
ca30a539 | 658 | static bool |
310bc633 | 659 | ipcp_versionable_function_p (struct cgraph_node *node) |
ca30a539 | 660 | { |
6cf67b62 | 661 | return IPA_NODE_REF (node) && IPA_NODE_REF (node)->versionable; |
310bc633 | 662 | } |
ca30a539 | 663 | |
310bc633 | 664 | /* Structure holding accumulated information about callers of a node. */ |
749f25d8 | 665 | |
310bc633 MJ |
666 | struct caller_statistics |
667 | { | |
3995f3a2 | 668 | profile_count count_sum; |
310bc633 MJ |
669 | int n_calls, n_hot_calls, freq_sum; |
670 | }; | |
ca30a539 | 671 | |
310bc633 | 672 | /* Initialize fields of STAT to zeroes. */ |
530f3a1b | 673 | |
310bc633 MJ |
674 | static inline void |
675 | init_caller_stats (struct caller_statistics *stats) | |
676 | { | |
3995f3a2 | 677 | stats->count_sum = profile_count::zero (); |
310bc633 MJ |
678 | stats->n_calls = 0; |
679 | stats->n_hot_calls = 0; | |
680 | stats->freq_sum = 0; | |
681 | } | |
682 | ||
683 | /* Worker callback of cgraph_for_node_and_aliases accumulating statistics of | |
684 | non-thunk incoming edges to NODE. */ | |
685 | ||
686 | static bool | |
687 | gather_caller_stats (struct cgraph_node *node, void *data) | |
688 | { | |
689 | struct caller_statistics *stats = (struct caller_statistics *) data; | |
690 | struct cgraph_edge *cs; | |
691 | ||
692 | for (cs = node->callers; cs; cs = cs->next_caller) | |
94a2f772 | 693 | if (!cs->caller->thunk.thunk_p) |
310bc633 | 694 | { |
1bad9c18 JH |
695 | if (cs->count.ipa ().initialized_p ()) |
696 | stats->count_sum += cs->count.ipa (); | |
697 | stats->freq_sum += cs->frequency (); | |
310bc633 | 698 | stats->n_calls++; |
3dafb85c | 699 | if (cs->maybe_hot_p ()) |
310bc633 MJ |
700 | stats->n_hot_calls ++; |
701 | } | |
702 | return false; | |
703 | ||
704 | } | |
705 | ||
706 | /* Return true if this NODE is viable candidate for cloning. */ | |
707 | ||
708 | static bool | |
709 | ipcp_cloning_candidate_p (struct cgraph_node *node) | |
710 | { | |
711 | struct caller_statistics stats; | |
712 | ||
d52f5295 | 713 | gcc_checking_assert (node->has_gimple_body_p ()); |
b8698a0f | 714 | |
2bf86c84 | 715 | if (!opt_for_fn (node->decl, flag_ipa_cp_clone)) |
ca30a539 JH |
716 | { |
717 | if (dump_file) | |
155c9907 | 718 | fprintf (dump_file, "Not considering %s for cloning; " |
310bc633 | 719 | "-fipa-cp-clone disabled.\n", |
3629ff8a | 720 | node->dump_name ()); |
ca30a539 JH |
721 | return false; |
722 | } | |
ca30a539 | 723 | |
5af56ae8 | 724 | if (node->optimize_for_size_p ()) |
ca30a539 JH |
725 | { |
726 | if (dump_file) | |
155c9907 | 727 | fprintf (dump_file, "Not considering %s for cloning; " |
310bc633 | 728 | "optimizing it for size.\n", |
3629ff8a | 729 | node->dump_name ()); |
ca30a539 JH |
730 | return false; |
731 | } | |
732 | ||
310bc633 | 733 | init_caller_stats (&stats); |
d52f5295 | 734 | node->call_for_symbol_thunks_and_aliases (gather_caller_stats, &stats, false); |
310bc633 | 735 | |
f658ad30 | 736 | if (ipa_size_summaries->get (node)->self_size < stats.n_calls) |
ca30a539 JH |
737 | { |
738 | if (dump_file) | |
155c9907 | 739 | fprintf (dump_file, "Considering %s for cloning; code might shrink.\n", |
3629ff8a | 740 | node->dump_name ()); |
310bc633 | 741 | return true; |
ca30a539 JH |
742 | } |
743 | ||
744 | /* When profile is available and function is hot, propagate into it even if | |
745 | calls seems cold; constant propagation can improve function's speed | |
61502ca8 | 746 | significantly. */ |
3995f3a2 | 747 | if (max_count > profile_count::zero ()) |
ca30a539 | 748 | { |
1bad9c18 | 749 | if (stats.count_sum > node->count.ipa ().apply_scale (90, 100)) |
ca30a539 JH |
750 | { |
751 | if (dump_file) | |
310bc633 MJ |
752 | fprintf (dump_file, "Considering %s for cloning; " |
753 | "usually called directly.\n", | |
3629ff8a | 754 | node->dump_name ()); |
ca30a539 | 755 | return true; |
155c9907 | 756 | } |
ca30a539 | 757 | } |
310bc633 | 758 | if (!stats.n_hot_calls) |
ca30a539 JH |
759 | { |
760 | if (dump_file) | |
761 | fprintf (dump_file, "Not considering %s for cloning; no hot calls.\n", | |
3629ff8a | 762 | node->dump_name ()); |
ed102b70 | 763 | return false; |
ca30a539 JH |
764 | } |
765 | if (dump_file) | |
766 | fprintf (dump_file, "Considering %s for cloning.\n", | |
3629ff8a | 767 | node->dump_name ()); |
ca30a539 JH |
768 | return true; |
769 | } | |
770 | ||
c0cb5055 MJ |
771 | template <typename valtype> |
772 | class value_topo_info | |
773 | { | |
774 | public: | |
775 | /* Head of the linked list of topologically sorted values. */ | |
776 | ipcp_value<valtype> *values_topo; | |
777 | /* Stack for creating SCCs, represented by a linked list too. */ | |
778 | ipcp_value<valtype> *stack; | |
779 | /* Counter driving the algorithm in add_val_to_toposort. */ | |
780 | int dfs_counter; | |
781 | ||
782 | value_topo_info () : values_topo (NULL), stack (NULL), dfs_counter (0) | |
783 | {} | |
784 | void add_val (ipcp_value<valtype> *cur_val); | |
785 | void propagate_effects (); | |
786 | }; | |
787 | ||
310bc633 | 788 | /* Arrays representing a topological ordering of call graph nodes and a stack |
c0cb5055 MJ |
789 | of nodes used during constant propagation and also data required to perform |
790 | topological sort of values and propagation of benefits in the determined | |
791 | order. */ | |
3949c4a7 | 792 | |
c0cb5055 | 793 | class ipa_topo_info |
3949c4a7 | 794 | { |
c0cb5055 MJ |
795 | public: |
796 | /* Array with obtained topological order of cgraph nodes. */ | |
310bc633 | 797 | struct cgraph_node **order; |
c0cb5055 MJ |
798 | /* Stack of cgraph nodes used during propagation within SCC until all values |
799 | in the SCC stabilize. */ | |
310bc633 MJ |
800 | struct cgraph_node **stack; |
801 | int nnodes, stack_top; | |
c0cb5055 MJ |
802 | |
803 | value_topo_info<tree> constants; | |
44210a96 | 804 | value_topo_info<ipa_polymorphic_call_context> contexts; |
c0cb5055 MJ |
805 | |
806 | ipa_topo_info () : order(NULL), stack(NULL), nnodes(0), stack_top(0), | |
807 | constants () | |
808 | {} | |
310bc633 MJ |
809 | }; |
810 | ||
97e59627 ML |
811 | /* Skip edges from and to nodes without ipa_cp enabled. |
812 | Ignore not available symbols. */ | |
813 | ||
814 | static bool | |
815 | ignore_edge_p (cgraph_edge *e) | |
816 | { | |
817 | enum availability avail; | |
818 | cgraph_node *ultimate_target | |
819 | = e->callee->function_or_virtual_thunk_symbol (&avail, e->caller); | |
820 | ||
821 | return (avail <= AVAIL_INTERPOSABLE | |
e72763e2 | 822 | || !opt_for_fn (ultimate_target->decl, optimize) |
97e59627 ML |
823 | || !opt_for_fn (ultimate_target->decl, flag_ipa_cp)); |
824 | } | |
825 | ||
310bc633 MJ |
826 | /* Allocate the arrays in TOPO and topologically sort the nodes into order. */ |
827 | ||
828 | static void | |
99b1c316 | 829 | build_toporder_info (class ipa_topo_info *topo) |
310bc633 | 830 | { |
3dafb85c ML |
831 | topo->order = XCNEWVEC (struct cgraph_node *, symtab->cgraph_count); |
832 | topo->stack = XCNEWVEC (struct cgraph_node *, symtab->cgraph_count); | |
833 | ||
c0cb5055 | 834 | gcc_checking_assert (topo->stack_top == 0); |
97e59627 ML |
835 | topo->nnodes = ipa_reduced_postorder (topo->order, true, |
836 | ignore_edge_p); | |
3949c4a7 MJ |
837 | } |
838 | ||
310bc633 MJ |
839 | /* Free information about strongly connected components and the arrays in |
840 | TOPO. */ | |
841 | ||
518dc859 | 842 | static void |
99b1c316 | 843 | free_toporder_info (class ipa_topo_info *topo) |
310bc633 MJ |
844 | { |
845 | ipa_free_postorder_info (); | |
846 | free (topo->order); | |
847 | free (topo->stack); | |
848 | } | |
849 | ||
850 | /* Add NODE to the stack in TOPO, unless it is already there. */ | |
851 | ||
852 | static inline void | |
99b1c316 | 853 | push_node_to_stack (class ipa_topo_info *topo, struct cgraph_node *node) |
518dc859 | 854 | { |
99b1c316 | 855 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 MJ |
856 | if (info->node_enqueued) |
857 | return; | |
858 | info->node_enqueued = 1; | |
859 | topo->stack[topo->stack_top++] = node; | |
860 | } | |
518dc859 | 861 | |
310bc633 MJ |
862 | /* Pop a node from the stack in TOPO and return it or return NULL if the stack |
863 | is empty. */ | |
ca30a539 | 864 | |
310bc633 | 865 | static struct cgraph_node * |
99b1c316 | 866 | pop_node_from_stack (class ipa_topo_info *topo) |
310bc633 MJ |
867 | { |
868 | if (topo->stack_top) | |
3949c4a7 | 869 | { |
310bc633 MJ |
870 | struct cgraph_node *node; |
871 | topo->stack_top--; | |
872 | node = topo->stack[topo->stack_top]; | |
873 | IPA_NODE_REF (node)->node_enqueued = 0; | |
874 | return node; | |
3949c4a7 | 875 | } |
310bc633 MJ |
876 | else |
877 | return NULL; | |
518dc859 RL |
878 | } |
879 | ||
310bc633 MJ |
880 | /* Set lattice LAT to bottom and return true if it previously was not set as |
881 | such. */ | |
882 | ||
c0cb5055 MJ |
883 | template <typename valtype> |
884 | inline bool | |
885 | ipcp_lattice<valtype>::set_to_bottom () | |
518dc859 | 886 | { |
c0cb5055 MJ |
887 | bool ret = !bottom; |
888 | bottom = true; | |
310bc633 MJ |
889 | return ret; |
890 | } | |
518dc859 | 891 | |
310bc633 MJ |
892 | /* Mark lattice as containing an unknown value and return true if it previously |
893 | was not marked as such. */ | |
129a37fc | 894 | |
c0cb5055 MJ |
895 | template <typename valtype> |
896 | inline bool | |
897 | ipcp_lattice<valtype>::set_contains_variable () | |
310bc633 | 898 | { |
c0cb5055 MJ |
899 | bool ret = !contains_variable; |
900 | contains_variable = true; | |
310bc633 | 901 | return ret; |
518dc859 RL |
902 | } |
903 | ||
f25ae20e | 904 | /* Set all aggregate lattices in PLATS to bottom and return true if they were |
2c9561b5 MJ |
905 | not previously set as such. */ |
906 | ||
907 | static inline bool | |
99b1c316 | 908 | set_agg_lats_to_bottom (class ipcp_param_lattices *plats) |
2c9561b5 MJ |
909 | { |
910 | bool ret = !plats->aggs_bottom; | |
911 | plats->aggs_bottom = true; | |
912 | return ret; | |
913 | } | |
914 | ||
f25ae20e | 915 | /* Mark all aggregate lattices in PLATS as containing an unknown value and |
2c9561b5 MJ |
916 | return true if they were not previously marked as such. */ |
917 | ||
918 | static inline bool | |
99b1c316 | 919 | set_agg_lats_contain_variable (class ipcp_param_lattices *plats) |
2c9561b5 MJ |
920 | { |
921 | bool ret = !plats->aggs_contain_variable; | |
922 | plats->aggs_contain_variable = true; | |
923 | return ret; | |
924 | } | |
925 | ||
8bc5448f KV |
926 | bool |
927 | ipcp_vr_lattice::meet_with (const ipcp_vr_lattice &other) | |
928 | { | |
929 | return meet_with_1 (&other.m_vr); | |
930 | } | |
931 | ||
f25ae20e | 932 | /* Meet the current value of the lattice with value range described by VR |
8bc5448f KV |
933 | lattice. */ |
934 | ||
935 | bool | |
028d81b1 | 936 | ipcp_vr_lattice::meet_with (const value_range *p_vr) |
8bc5448f KV |
937 | { |
938 | return meet_with_1 (p_vr); | |
939 | } | |
940 | ||
54994253 AH |
941 | /* Meet the current value of the lattice with value range described by |
942 | OTHER_VR lattice. Return TRUE if anything changed. */ | |
8bc5448f KV |
943 | |
944 | bool | |
028d81b1 | 945 | ipcp_vr_lattice::meet_with_1 (const value_range *other_vr) |
8bc5448f | 946 | { |
8bc5448f KV |
947 | if (bottom_p ()) |
948 | return false; | |
949 | ||
54994253 | 950 | if (other_vr->varying_p ()) |
8bc5448f KV |
951 | return set_to_bottom (); |
952 | ||
028d81b1 | 953 | value_range save (m_vr); |
54994253 | 954 | m_vr.union_ (other_vr); |
ff361cc6 | 955 | return !m_vr.equal_p (save); |
8bc5448f KV |
956 | } |
957 | ||
958 | /* Return true if value range information in the lattice is yet unknown. */ | |
959 | ||
960 | bool | |
961 | ipcp_vr_lattice::top_p () const | |
962 | { | |
54994253 | 963 | return m_vr.undefined_p (); |
8bc5448f KV |
964 | } |
965 | ||
966 | /* Return true if value range information in the lattice is known to be | |
967 | unusable. */ | |
968 | ||
969 | bool | |
970 | ipcp_vr_lattice::bottom_p () const | |
971 | { | |
54994253 | 972 | return m_vr.varying_p (); |
8bc5448f KV |
973 | } |
974 | ||
975 | /* Set value range information in the lattice to bottom. Return true if it | |
976 | previously was in a different state. */ | |
977 | ||
978 | bool | |
979 | ipcp_vr_lattice::set_to_bottom () | |
980 | { | |
54994253 | 981 | if (m_vr.varying_p ()) |
8bc5448f | 982 | return false; |
97ecc8d5 AH |
983 | /* ?? We create all sorts of VARYING ranges for floats, structures, |
984 | and other types which we cannot handle as ranges. We should | |
985 | probably avoid handling them throughout the pass, but it's easier | |
986 | to create a sensible VARYING here and let the lattice | |
987 | propagate. */ | |
988 | m_vr.set_varying (integer_type_node); | |
8bc5448f KV |
989 | return true; |
990 | } | |
991 | ||
209ca542 PK |
992 | /* Set lattice value to bottom, if it already isn't the case. */ |
993 | ||
994 | bool | |
995 | ipcp_bits_lattice::set_to_bottom () | |
996 | { | |
997 | if (bottom_p ()) | |
998 | return false; | |
999 | m_lattice_val = IPA_BITS_VARYING; | |
1000 | m_value = 0; | |
1001 | m_mask = -1; | |
1002 | return true; | |
1003 | } | |
1004 | ||
1005 | /* Set to constant if it isn't already. Only meant to be called | |
1006 | when switching state from TOP. */ | |
1007 | ||
1008 | bool | |
1009 | ipcp_bits_lattice::set_to_constant (widest_int value, widest_int mask) | |
1010 | { | |
1011 | gcc_assert (top_p ()); | |
1012 | m_lattice_val = IPA_BITS_CONSTANT; | |
1013 | m_value = value; | |
1014 | m_mask = mask; | |
1015 | return true; | |
1016 | } | |
1017 | ||
1018 | /* Convert operand to value, mask form. */ | |
1019 | ||
1020 | void | |
1021 | ipcp_bits_lattice::get_value_and_mask (tree operand, widest_int *valuep, widest_int *maskp) | |
1022 | { | |
1023 | wide_int get_nonzero_bits (const_tree); | |
1024 | ||
1025 | if (TREE_CODE (operand) == INTEGER_CST) | |
1026 | { | |
155c9907 | 1027 | *valuep = wi::to_widest (operand); |
209ca542 PK |
1028 | *maskp = 0; |
1029 | } | |
1030 | else | |
1031 | { | |
1032 | *valuep = 0; | |
1033 | *maskp = -1; | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | /* Meet operation, similar to ccp_lattice_meet, we xor values | |
1038 | if this->value, value have different values at same bit positions, we want | |
1039 | to drop that bit to varying. Return true if mask is changed. | |
1040 | This function assumes that the lattice value is in CONSTANT state */ | |
1041 | ||
1042 | bool | |
1043 | ipcp_bits_lattice::meet_with_1 (widest_int value, widest_int mask, | |
1044 | unsigned precision) | |
1045 | { | |
1046 | gcc_assert (constant_p ()); | |
155c9907 JJ |
1047 | |
1048 | widest_int old_mask = m_mask; | |
209ca542 PK |
1049 | m_mask = (m_mask | mask) | (m_value ^ value); |
1050 | ||
1051 | if (wi::sext (m_mask, precision) == -1) | |
1052 | return set_to_bottom (); | |
1053 | ||
1054 | return m_mask != old_mask; | |
1055 | } | |
1056 | ||
1057 | /* Meet the bits lattice with operand | |
1058 | described by <value, mask, sgn, precision. */ | |
1059 | ||
1060 | bool | |
1061 | ipcp_bits_lattice::meet_with (widest_int value, widest_int mask, | |
1062 | unsigned precision) | |
1063 | { | |
1064 | if (bottom_p ()) | |
1065 | return false; | |
1066 | ||
1067 | if (top_p ()) | |
1068 | { | |
1069 | if (wi::sext (mask, precision) == -1) | |
1070 | return set_to_bottom (); | |
155c9907 | 1071 | return set_to_constant (value, mask); |
209ca542 PK |
1072 | } |
1073 | ||
1074 | return meet_with_1 (value, mask, precision); | |
1075 | } | |
1076 | ||
1077 | /* Meet bits lattice with the result of bit_value_binop (other, operand) | |
1078 | if code is binary operation or bit_value_unop (other) if code is unary op. | |
1079 | In the case when code is nop_expr, no adjustment is required. */ | |
1080 | ||
1081 | bool | |
1082 | ipcp_bits_lattice::meet_with (ipcp_bits_lattice& other, unsigned precision, | |
1083 | signop sgn, enum tree_code code, tree operand) | |
1084 | { | |
1085 | if (other.bottom_p ()) | |
1086 | return set_to_bottom (); | |
1087 | ||
1088 | if (bottom_p () || other.top_p ()) | |
1089 | return false; | |
1090 | ||
1091 | widest_int adjusted_value, adjusted_mask; | |
1092 | ||
1093 | if (TREE_CODE_CLASS (code) == tcc_binary) | |
1094 | { | |
1095 | tree type = TREE_TYPE (operand); | |
209ca542 PK |
1096 | widest_int o_value, o_mask; |
1097 | get_value_and_mask (operand, &o_value, &o_mask); | |
1098 | ||
1099 | bit_value_binop (code, sgn, precision, &adjusted_value, &adjusted_mask, | |
1100 | sgn, precision, other.get_value (), other.get_mask (), | |
1101 | TYPE_SIGN (type), TYPE_PRECISION (type), o_value, o_mask); | |
1102 | ||
1103 | if (wi::sext (adjusted_mask, precision) == -1) | |
1104 | return set_to_bottom (); | |
1105 | } | |
1106 | ||
1107 | else if (TREE_CODE_CLASS (code) == tcc_unary) | |
1108 | { | |
1109 | bit_value_unop (code, sgn, precision, &adjusted_value, | |
1110 | &adjusted_mask, sgn, precision, other.get_value (), | |
1111 | other.get_mask ()); | |
1112 | ||
1113 | if (wi::sext (adjusted_mask, precision) == -1) | |
1114 | return set_to_bottom (); | |
1115 | } | |
1116 | ||
209ca542 PK |
1117 | else |
1118 | return set_to_bottom (); | |
1119 | ||
1120 | if (top_p ()) | |
1121 | { | |
1122 | if (wi::sext (adjusted_mask, precision) == -1) | |
1123 | return set_to_bottom (); | |
155c9907 | 1124 | return set_to_constant (adjusted_value, adjusted_mask); |
209ca542 PK |
1125 | } |
1126 | else | |
1127 | return meet_with_1 (adjusted_value, adjusted_mask, precision); | |
1128 | } | |
1129 | ||
2c9561b5 MJ |
1130 | /* Mark bot aggregate and scalar lattices as containing an unknown variable, |
1131 | return true is any of them has not been marked as such so far. */ | |
1132 | ||
1133 | static inline bool | |
99b1c316 | 1134 | set_all_contains_variable (class ipcp_param_lattices *plats) |
2c9561b5 | 1135 | { |
44210a96 MJ |
1136 | bool ret; |
1137 | ret = plats->itself.set_contains_variable (); | |
1138 | ret |= plats->ctxlat.set_contains_variable (); | |
1139 | ret |= set_agg_lats_contain_variable (plats); | |
209ca542 | 1140 | ret |= plats->bits_lattice.set_to_bottom (); |
8bc5448f | 1141 | ret |= plats->m_value_range.set_to_bottom (); |
2c9561b5 MJ |
1142 | return ret; |
1143 | } | |
1144 | ||
af21714c MJ |
1145 | /* Worker of call_for_symbol_thunks_and_aliases, increment the integer DATA |
1146 | points to by the number of callers to NODE. */ | |
1147 | ||
1148 | static bool | |
1149 | count_callers (cgraph_node *node, void *data) | |
1150 | { | |
1151 | int *caller_count = (int *) data; | |
1152 | ||
1153 | for (cgraph_edge *cs = node->callers; cs; cs = cs->next_caller) | |
67914693 | 1154 | /* Local thunks can be handled transparently, but if the thunk cannot |
af21714c | 1155 | be optimized out, count it as a real use. */ |
87f94429 | 1156 | if (!cs->caller->thunk.thunk_p || !cs->caller->local) |
af21714c MJ |
1157 | ++*caller_count; |
1158 | return false; | |
1159 | } | |
1160 | ||
1161 | /* Worker of call_for_symbol_thunks_and_aliases, it is supposed to be called on | |
1162 | the one caller of some other node. Set the caller's corresponding flag. */ | |
1163 | ||
1164 | static bool | |
1165 | set_single_call_flag (cgraph_node *node, void *) | |
1166 | { | |
1167 | cgraph_edge *cs = node->callers; | |
1168 | /* Local thunks can be handled transparently, skip them. */ | |
87f94429 | 1169 | while (cs && cs->caller->thunk.thunk_p && cs->caller->local) |
af21714c | 1170 | cs = cs->next_caller; |
68188fff | 1171 | if (cs && IPA_NODE_REF (cs->caller)) |
af21714c | 1172 | { |
af21714c MJ |
1173 | IPA_NODE_REF (cs->caller)->node_calling_single_call = true; |
1174 | return true; | |
1175 | } | |
1176 | return false; | |
1177 | } | |
1178 | ||
310bc633 | 1179 | /* Initialize ipcp_lattices. */ |
43558bcc | 1180 | |
518dc859 | 1181 | static void |
310bc633 | 1182 | initialize_node_lattices (struct cgraph_node *node) |
518dc859 | 1183 | { |
99b1c316 | 1184 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 MJ |
1185 | struct cgraph_edge *ie; |
1186 | bool disable = false, variable = false; | |
1187 | int i; | |
518dc859 | 1188 | |
d52f5295 | 1189 | gcc_checking_assert (node->has_gimple_body_p ()); |
ff6686d2 MJ |
1190 | |
1191 | if (!ipa_get_param_count (info)) | |
1192 | disable = true; | |
87f94429 | 1193 | else if (node->local) |
af21714c MJ |
1194 | { |
1195 | int caller_count = 0; | |
1196 | node->call_for_symbol_thunks_and_aliases (count_callers, &caller_count, | |
1197 | true); | |
1198 | gcc_checking_assert (caller_count > 0); | |
1199 | if (caller_count == 1) | |
1200 | node->call_for_symbol_thunks_and_aliases (set_single_call_flag, | |
1201 | NULL, true); | |
1202 | } | |
1203 | else | |
310bc633 MJ |
1204 | { |
1205 | /* When cloning is allowed, we can assume that externally visible | |
1206 | functions are not called. We will compensate this by cloning | |
1207 | later. */ | |
1208 | if (ipcp_versionable_function_p (node) | |
1209 | && ipcp_cloning_candidate_p (node)) | |
1210 | variable = true; | |
1211 | else | |
1212 | disable = true; | |
1213 | } | |
518dc859 | 1214 | |
ff6686d2 MJ |
1215 | if (dump_file && (dump_flags & TDF_DETAILS) |
1216 | && !node->alias && !node->thunk.thunk_p) | |
8bc5448f | 1217 | { |
ff6686d2 MJ |
1218 | fprintf (dump_file, "Initializing lattices of %s\n", |
1219 | node->dump_name ()); | |
1220 | if (disable || variable) | |
1221 | fprintf (dump_file, " Marking all lattices as %s\n", | |
1222 | disable ? "BOTTOM" : "VARIABLE"); | |
8bc5448f KV |
1223 | } |
1224 | ||
ff6686d2 MJ |
1225 | auto_vec<bool, 16> surviving_params; |
1226 | bool pre_modified = false; | |
1227 | if (!disable && node->clone.param_adjustments) | |
310bc633 | 1228 | { |
ff6686d2 MJ |
1229 | /* At the moment all IPA optimizations should use the number of |
1230 | parameters of the prevailing decl as the m_always_copy_start. | |
1231 | Handling any other value would complicate the code below, so for the | |
1232 | time bing let's only assert it is so. */ | |
1233 | gcc_assert ((node->clone.param_adjustments->m_always_copy_start | |
1234 | == ipa_get_param_count (info)) | |
1235 | || node->clone.param_adjustments->m_always_copy_start < 0); | |
1236 | ||
1237 | pre_modified = true; | |
1238 | node->clone.param_adjustments->get_surviving_params (&surviving_params); | |
1239 | ||
1240 | if (dump_file && (dump_flags & TDF_DETAILS) | |
1241 | && !node->alias && !node->thunk.thunk_p) | |
310bc633 | 1242 | { |
ff6686d2 MJ |
1243 | bool first = true; |
1244 | for (int j = 0; j < ipa_get_param_count (info); j++) | |
2c9561b5 | 1245 | { |
ff6686d2 MJ |
1246 | if (j < (int) surviving_params.length () |
1247 | && surviving_params[j]) | |
1248 | continue; | |
1249 | if (first) | |
1250 | { | |
1251 | fprintf (dump_file, | |
1252 | " The following parameters are dead on arrival:"); | |
1253 | first = false; | |
1254 | } | |
1255 | fprintf (dump_file, " %u", j); | |
2c9561b5 | 1256 | } |
ff6686d2 MJ |
1257 | if (!first) |
1258 | fprintf (dump_file, "\n"); | |
1259 | } | |
1260 | } | |
1261 | ||
1262 | for (i = 0; i < ipa_get_param_count (info); i++) | |
1263 | { | |
1264 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
1265 | if (disable | |
1266 | || (pre_modified && (surviving_params.length () <= (unsigned) i | |
1267 | || !surviving_params[i]))) | |
1268 | { | |
1269 | plats->itself.set_to_bottom (); | |
1270 | plats->ctxlat.set_to_bottom (); | |
1271 | set_agg_lats_to_bottom (plats); | |
1272 | plats->bits_lattice.set_to_bottom (); | |
1273 | plats->m_value_range.set_to_bottom (); | |
1274 | } | |
1275 | else | |
1276 | { | |
1277 | plats->m_value_range.init (); | |
1278 | if (variable) | |
2c9561b5 | 1279 | set_all_contains_variable (plats); |
310bc633 | 1280 | } |
310bc633 | 1281 | } |
518dc859 | 1282 | |
310bc633 | 1283 | for (ie = node->indirect_calls; ie; ie = ie->next_callee) |
1d5755ef | 1284 | if (ie->indirect_info->polymorphic |
155c9907 | 1285 | && ie->indirect_info->param_index >= 0) |
0818c24c | 1286 | { |
310bc633 | 1287 | gcc_checking_assert (ie->indirect_info->param_index >= 0); |
2c9561b5 MJ |
1288 | ipa_get_parm_lattices (info, |
1289 | ie->indirect_info->param_index)->virt_call = 1; | |
0818c24c | 1290 | } |
518dc859 RL |
1291 | } |
1292 | ||
eb270950 FX |
1293 | /* Return the result of a (possibly arithmetic) operation on the constant |
1294 | value INPUT. OPERAND is 2nd operand for binary operation. RES_TYPE is | |
1295 | the type of the parameter to which the result is passed. Return | |
1296 | NULL_TREE if that cannot be determined or be considered an | |
1297 | interprocedural invariant. */ | |
3949c4a7 | 1298 | |
310bc633 | 1299 | static tree |
eb270950 FX |
1300 | ipa_get_jf_arith_result (enum tree_code opcode, tree input, tree operand, |
1301 | tree res_type) | |
3949c4a7 | 1302 | { |
e5cf5e11 | 1303 | tree res; |
3949c4a7 | 1304 | |
eb270950 | 1305 | if (opcode == NOP_EXPR) |
310bc633 | 1306 | return input; |
04643334 MJ |
1307 | if (!is_gimple_ip_invariant (input)) |
1308 | return NULL_TREE; | |
3949c4a7 | 1309 | |
e5cf5e11 | 1310 | if (!res_type) |
a2b4c188 | 1311 | { |
e5cf5e11 PK |
1312 | if (TREE_CODE_CLASS (opcode) == tcc_comparison) |
1313 | res_type = boolean_type_node; | |
1314 | else if (expr_type_first_operand_type_p (opcode)) | |
1315 | res_type = TREE_TYPE (input); | |
a2b4c188 | 1316 | else |
e5cf5e11 | 1317 | return NULL_TREE; |
a2b4c188 | 1318 | } |
e5cf5e11 PK |
1319 | |
1320 | if (TREE_CODE_CLASS (opcode) == tcc_unary) | |
1321 | res = fold_unary (opcode, res_type, input); | |
1322 | else | |
eb270950 | 1323 | res = fold_binary (opcode, res_type, input, operand); |
e5cf5e11 | 1324 | |
310bc633 MJ |
1325 | if (res && !is_gimple_ip_invariant (res)) |
1326 | return NULL_TREE; | |
3949c4a7 | 1327 | |
310bc633 | 1328 | return res; |
3949c4a7 MJ |
1329 | } |
1330 | ||
eb270950 FX |
1331 | /* Return the result of a (possibly arithmetic) pass through jump function |
1332 | JFUNC on the constant value INPUT. RES_TYPE is the type of the parameter | |
1333 | to which the result is passed. Return NULL_TREE if that cannot be | |
1334 | determined or be considered an interprocedural invariant. */ | |
1335 | ||
1336 | static tree | |
1337 | ipa_get_jf_pass_through_result (struct ipa_jump_func *jfunc, tree input, | |
1338 | tree res_type) | |
1339 | { | |
1340 | return ipa_get_jf_arith_result (ipa_get_jf_pass_through_operation (jfunc), | |
1341 | input, | |
1342 | ipa_get_jf_pass_through_operand (jfunc), | |
1343 | res_type); | |
1344 | } | |
1345 | ||
310bc633 MJ |
1346 | /* Return the result of an ancestor jump function JFUNC on the constant value |
1347 | INPUT. Return NULL_TREE if that cannot be determined. */ | |
3949c4a7 | 1348 | |
310bc633 MJ |
1349 | static tree |
1350 | ipa_get_jf_ancestor_result (struct ipa_jump_func *jfunc, tree input) | |
3949c4a7 | 1351 | { |
44210a96 MJ |
1352 | gcc_checking_assert (TREE_CODE (input) != TREE_BINFO); |
1353 | if (TREE_CODE (input) == ADDR_EXPR) | |
3949c4a7 | 1354 | { |
310bc633 MJ |
1355 | tree t = TREE_OPERAND (input, 0); |
1356 | t = build_ref_for_offset (EXPR_LOCATION (t), t, | |
ee45a32d | 1357 | ipa_get_jf_ancestor_offset (jfunc), false, |
3b97a5c7 | 1358 | ptr_type_node, NULL, false); |
310bc633 | 1359 | return build_fold_addr_expr (t); |
3949c4a7 MJ |
1360 | } |
1361 | else | |
310bc633 MJ |
1362 | return NULL_TREE; |
1363 | } | |
3949c4a7 | 1364 | |
44210a96 MJ |
1365 | /* Determine whether JFUNC evaluates to a single known constant value and if |
1366 | so, return it. Otherwise return NULL. INFO describes the caller node or | |
1367 | the one it is inlined to, so that pass-through jump functions can be | |
e5cf5e11 PK |
1368 | evaluated. PARM_TYPE is the type of the parameter to which the result is |
1369 | passed. */ | |
310bc633 | 1370 | |
d2d668fb | 1371 | tree |
99b1c316 | 1372 | ipa_value_from_jfunc (class ipa_node_params *info, struct ipa_jump_func *jfunc, |
e5cf5e11 | 1373 | tree parm_type) |
310bc633 MJ |
1374 | { |
1375 | if (jfunc->type == IPA_JF_CONST) | |
7b872d9e | 1376 | return ipa_get_jf_constant (jfunc); |
310bc633 MJ |
1377 | else if (jfunc->type == IPA_JF_PASS_THROUGH |
1378 | || jfunc->type == IPA_JF_ANCESTOR) | |
3949c4a7 | 1379 | { |
310bc633 MJ |
1380 | tree input; |
1381 | int idx; | |
3949c4a7 | 1382 | |
310bc633 | 1383 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
7b872d9e | 1384 | idx = ipa_get_jf_pass_through_formal_id (jfunc); |
310bc633 | 1385 | else |
7b872d9e | 1386 | idx = ipa_get_jf_ancestor_formal_id (jfunc); |
3949c4a7 | 1387 | |
310bc633 | 1388 | if (info->ipcp_orig_node) |
44210a96 | 1389 | input = info->known_csts[idx]; |
310bc633 | 1390 | else |
3949c4a7 | 1391 | { |
c0cb5055 | 1392 | ipcp_lattice<tree> *lat; |
310bc633 | 1393 | |
370a7814 JH |
1394 | if (!info->lattices |
1395 | || idx >= ipa_get_param_count (info)) | |
2bf86c84 | 1396 | return NULL_TREE; |
2c9561b5 | 1397 | lat = ipa_get_scalar_lat (info, idx); |
c0cb5055 | 1398 | if (!lat->is_single_const ()) |
310bc633 MJ |
1399 | return NULL_TREE; |
1400 | input = lat->values->value; | |
1401 | } | |
1402 | ||
1403 | if (!input) | |
1404 | return NULL_TREE; | |
1405 | ||
1406 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
e5cf5e11 | 1407 | return ipa_get_jf_pass_through_result (jfunc, input, parm_type); |
310bc633 | 1408 | else |
7b872d9e | 1409 | return ipa_get_jf_ancestor_result (jfunc, input); |
3949c4a7 | 1410 | } |
310bc633 MJ |
1411 | else |
1412 | return NULL_TREE; | |
3949c4a7 MJ |
1413 | } |
1414 | ||
f25ae20e | 1415 | /* Determine whether JFUNC evaluates to single known polymorphic context, given |
44210a96 MJ |
1416 | that INFO describes the caller node or the one it is inlined to, CS is the |
1417 | call graph edge corresponding to JFUNC and CSIDX index of the described | |
1418 | parameter. */ | |
1419 | ||
1420 | ipa_polymorphic_call_context | |
1421 | ipa_context_from_jfunc (ipa_node_params *info, cgraph_edge *cs, int csidx, | |
1422 | ipa_jump_func *jfunc) | |
1423 | { | |
1424 | ipa_edge_args *args = IPA_EDGE_REF (cs); | |
1425 | ipa_polymorphic_call_context ctx; | |
1426 | ipa_polymorphic_call_context *edge_ctx | |
1427 | = cs ? ipa_get_ith_polymorhic_call_context (args, csidx) : NULL; | |
1428 | ||
1429 | if (edge_ctx && !edge_ctx->useless_p ()) | |
1430 | ctx = *edge_ctx; | |
1431 | ||
1432 | if (jfunc->type == IPA_JF_PASS_THROUGH | |
1433 | || jfunc->type == IPA_JF_ANCESTOR) | |
1434 | { | |
1435 | ipa_polymorphic_call_context srcctx; | |
1436 | int srcidx; | |
df0d8136 | 1437 | bool type_preserved = true; |
44210a96 MJ |
1438 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
1439 | { | |
df0d8136 | 1440 | if (ipa_get_jf_pass_through_operation (jfunc) != NOP_EXPR) |
44210a96 | 1441 | return ctx; |
df0d8136 | 1442 | type_preserved = ipa_get_jf_pass_through_type_preserved (jfunc); |
44210a96 MJ |
1443 | srcidx = ipa_get_jf_pass_through_formal_id (jfunc); |
1444 | } | |
1445 | else | |
1446 | { | |
df0d8136 | 1447 | type_preserved = ipa_get_jf_ancestor_type_preserved (jfunc); |
44210a96 MJ |
1448 | srcidx = ipa_get_jf_ancestor_formal_id (jfunc); |
1449 | } | |
1450 | if (info->ipcp_orig_node) | |
1451 | { | |
1452 | if (info->known_contexts.exists ()) | |
1453 | srcctx = info->known_contexts[srcidx]; | |
1454 | } | |
1455 | else | |
1456 | { | |
370a7814 JH |
1457 | if (!info->lattices |
1458 | || srcidx >= ipa_get_param_count (info)) | |
2bf86c84 | 1459 | return ctx; |
44210a96 MJ |
1460 | ipcp_lattice<ipa_polymorphic_call_context> *lat; |
1461 | lat = ipa_get_poly_ctx_lat (info, srcidx); | |
1462 | if (!lat->is_single_const ()) | |
1463 | return ctx; | |
1464 | srcctx = lat->values->value; | |
1465 | } | |
1466 | if (srcctx.useless_p ()) | |
1467 | return ctx; | |
1468 | if (jfunc->type == IPA_JF_ANCESTOR) | |
1469 | srcctx.offset_by (ipa_get_jf_ancestor_offset (jfunc)); | |
df0d8136 JH |
1470 | if (!type_preserved) |
1471 | srcctx.possible_dynamic_type_change (cs->in_polymorphic_cdtor); | |
1472 | srcctx.combine_with (ctx); | |
1473 | return srcctx; | |
44210a96 MJ |
1474 | } |
1475 | ||
1476 | return ctx; | |
1477 | } | |
3949c4a7 | 1478 | |
68718e8e JH |
1479 | /* Emulate effects of unary OPERATION and/or conversion from SRC_TYPE to |
1480 | DST_TYPE on value range in SRC_VR and store it to DST_VR. Return true if | |
1481 | the result is a range or an anti-range. */ | |
1482 | ||
1483 | static bool | |
1484 | ipa_vr_operation_and_type_effects (value_range *dst_vr, | |
1485 | value_range *src_vr, | |
1486 | enum tree_code operation, | |
1487 | tree dst_type, tree src_type) | |
1488 | { | |
1489 | range_fold_unary_expr (dst_vr, operation, dst_type, src_vr, src_type); | |
1490 | if (dst_vr->varying_p () || dst_vr->undefined_p ()) | |
1491 | return false; | |
1492 | return true; | |
1493 | } | |
1494 | ||
1495 | /* Determine value_range of JFUNC given that INFO describes the caller node or | |
1496 | the one it is inlined to, CS is the call graph edge corresponding to JFUNC | |
1497 | and PARM_TYPE of the parameter. */ | |
1498 | ||
1499 | value_range | |
1500 | ipa_value_range_from_jfunc (ipa_node_params *info, cgraph_edge *cs, | |
1501 | ipa_jump_func *jfunc, tree parm_type) | |
1502 | { | |
1503 | value_range vr; | |
1504 | return vr; | |
1505 | if (jfunc->m_vr) | |
1506 | ipa_vr_operation_and_type_effects (&vr, | |
1507 | jfunc->m_vr, | |
1508 | NOP_EXPR, parm_type, | |
1509 | jfunc->m_vr->type ()); | |
1510 | if (vr.singleton_p ()) | |
1511 | return vr; | |
1512 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
1513 | { | |
1514 | int idx; | |
1515 | ipcp_transformation *sum | |
1516 | = ipcp_get_transformation_summary (cs->caller->inlined_to | |
1517 | ? cs->caller->inlined_to | |
1518 | : cs->caller); | |
1519 | if (!sum || !sum->m_vr) | |
1520 | return vr; | |
1521 | ||
1522 | idx = ipa_get_jf_pass_through_formal_id (jfunc); | |
1523 | ||
1524 | if (!(*sum->m_vr)[idx].known) | |
1525 | return vr; | |
1526 | tree vr_type = ipa_get_type (info, idx); | |
1527 | value_range srcvr (wide_int_to_tree (vr_type, (*sum->m_vr)[idx].min), | |
1528 | wide_int_to_tree (vr_type, (*sum->m_vr)[idx].max), | |
1529 | (*sum->m_vr)[idx].type); | |
1530 | ||
1531 | enum tree_code operation = ipa_get_jf_pass_through_operation (jfunc); | |
1532 | ||
1533 | if (TREE_CODE_CLASS (operation) == tcc_unary) | |
1534 | { | |
1535 | value_range res; | |
1536 | ||
1537 | if (ipa_vr_operation_and_type_effects (&res, | |
1538 | &srcvr, | |
1539 | operation, parm_type, | |
1540 | vr_type)) | |
1541 | vr.intersect (res); | |
1542 | } | |
1543 | else | |
1544 | { | |
1545 | value_range op_res, res; | |
1546 | tree op = ipa_get_jf_pass_through_operand (jfunc); | |
1547 | value_range op_vr (op, op); | |
1548 | ||
1549 | range_fold_binary_expr (&op_res, operation, vr_type, &srcvr, &op_vr); | |
1550 | if (ipa_vr_operation_and_type_effects (&res, | |
1551 | &op_res, | |
1552 | NOP_EXPR, parm_type, | |
1553 | vr_type)) | |
1554 | vr.intersect (res); | |
1555 | } | |
1556 | } | |
1557 | return vr; | |
1558 | } | |
1559 | ||
eb270950 FX |
1560 | /* See if NODE is a clone with a known aggregate value at a given OFFSET of a |
1561 | parameter with the given INDEX. */ | |
1562 | ||
1563 | static tree | |
1564 | get_clone_agg_value (struct cgraph_node *node, HOST_WIDE_INT offset, | |
1565 | int index) | |
1566 | { | |
1567 | struct ipa_agg_replacement_value *aggval; | |
1568 | ||
1569 | aggval = ipa_get_agg_replacements_for_node (node); | |
1570 | while (aggval) | |
1571 | { | |
1572 | if (aggval->offset == offset | |
1573 | && aggval->index == index) | |
1574 | return aggval->value; | |
1575 | aggval = aggval->next; | |
1576 | } | |
1577 | return NULL_TREE; | |
1578 | } | |
1579 | ||
1580 | /* Determine whether ITEM, jump function for an aggregate part, evaluates to a | |
1581 | single known constant value and if so, return it. Otherwise return NULL. | |
1582 | NODE and INFO describes the caller node or the one it is inlined to, and | |
1583 | its related info. */ | |
1584 | ||
1585 | static tree | |
1586 | ipa_agg_value_from_node (class ipa_node_params *info, | |
1587 | struct cgraph_node *node, | |
1588 | struct ipa_agg_jf_item *item) | |
1589 | { | |
1590 | tree value = NULL_TREE; | |
1591 | int src_idx; | |
1592 | ||
1593 | if (item->offset < 0 || item->jftype == IPA_JF_UNKNOWN) | |
1594 | return NULL_TREE; | |
1595 | ||
1596 | if (item->jftype == IPA_JF_CONST) | |
1597 | return item->value.constant; | |
1598 | ||
1599 | gcc_checking_assert (item->jftype == IPA_JF_PASS_THROUGH | |
1600 | || item->jftype == IPA_JF_LOAD_AGG); | |
1601 | ||
1602 | src_idx = item->value.pass_through.formal_id; | |
1603 | ||
1604 | if (info->ipcp_orig_node) | |
1605 | { | |
1606 | if (item->jftype == IPA_JF_PASS_THROUGH) | |
1607 | value = info->known_csts[src_idx]; | |
1608 | else | |
1609 | value = get_clone_agg_value (node, item->value.load_agg.offset, | |
1610 | src_idx); | |
1611 | } | |
1612 | else if (info->lattices) | |
1613 | { | |
1614 | class ipcp_param_lattices *src_plats | |
1615 | = ipa_get_parm_lattices (info, src_idx); | |
1616 | ||
1617 | if (item->jftype == IPA_JF_PASS_THROUGH) | |
1618 | { | |
1619 | struct ipcp_lattice<tree> *lat = &src_plats->itself; | |
1620 | ||
1621 | if (!lat->is_single_const ()) | |
1622 | return NULL_TREE; | |
1623 | ||
1624 | value = lat->values->value; | |
1625 | } | |
1626 | else if (src_plats->aggs | |
1627 | && !src_plats->aggs_bottom | |
1628 | && !src_plats->aggs_contain_variable | |
1629 | && src_plats->aggs_by_ref == item->value.load_agg.by_ref) | |
1630 | { | |
1631 | struct ipcp_agg_lattice *aglat; | |
1632 | ||
1633 | for (aglat = src_plats->aggs; aglat; aglat = aglat->next) | |
1634 | { | |
1635 | if (aglat->offset > item->value.load_agg.offset) | |
1636 | break; | |
1637 | ||
1638 | if (aglat->offset == item->value.load_agg.offset) | |
1639 | { | |
1640 | if (aglat->is_single_const ()) | |
1641 | value = aglat->values->value; | |
1642 | break; | |
1643 | } | |
1644 | } | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | if (!value) | |
1649 | return NULL_TREE; | |
1650 | ||
1651 | if (item->jftype == IPA_JF_LOAD_AGG) | |
1652 | { | |
1653 | tree load_type = item->value.load_agg.type; | |
1654 | tree value_type = TREE_TYPE (value); | |
1655 | ||
1656 | /* Ensure value type is compatible with load type. */ | |
1657 | if (!useless_type_conversion_p (load_type, value_type)) | |
1658 | return NULL_TREE; | |
1659 | } | |
1660 | ||
1661 | return ipa_get_jf_arith_result (item->value.pass_through.operation, | |
1662 | value, | |
1663 | item->value.pass_through.operand, | |
1664 | item->type); | |
1665 | } | |
1666 | ||
1667 | /* Determine whether AGG_JFUNC evaluates to a set of known constant value for | |
1668 | an aggregate and if so, return it. Otherwise return an empty set. NODE | |
1669 | and INFO describes the caller node or the one it is inlined to, and its | |
1670 | related info. */ | |
1671 | ||
1672 | struct ipa_agg_value_set | |
1673 | ipa_agg_value_set_from_jfunc (class ipa_node_params *info, cgraph_node *node, | |
1674 | struct ipa_agg_jump_function *agg_jfunc) | |
1675 | { | |
1676 | struct ipa_agg_value_set agg; | |
1677 | struct ipa_agg_jf_item *item; | |
1678 | int i; | |
1679 | ||
1680 | agg.items = vNULL; | |
1681 | agg.by_ref = agg_jfunc->by_ref; | |
1682 | ||
1683 | FOR_EACH_VEC_SAFE_ELT (agg_jfunc->items, i, item) | |
1684 | { | |
1685 | tree value = ipa_agg_value_from_node (info, node, item); | |
1686 | ||
1687 | if (value) | |
1688 | { | |
1689 | struct ipa_agg_value value_item; | |
1690 | ||
1691 | value_item.offset = item->offset; | |
1692 | value_item.value = value; | |
1693 | ||
1694 | agg.items.safe_push (value_item); | |
1695 | } | |
1696 | } | |
1697 | return agg; | |
1698 | } | |
1699 | ||
310bc633 MJ |
1700 | /* If checking is enabled, verify that no lattice is in the TOP state, i.e. not |
1701 | bottom, not containing a variable component and without any known value at | |
1702 | the same time. */ | |
3949c4a7 | 1703 | |
310bc633 MJ |
1704 | DEBUG_FUNCTION void |
1705 | ipcp_verify_propagated_values (void) | |
518dc859 | 1706 | { |
310bc633 | 1707 | struct cgraph_node *node; |
ca30a539 | 1708 | |
310bc633 | 1709 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) |
518dc859 | 1710 | { |
99b1c316 | 1711 | class ipa_node_params *info = IPA_NODE_REF (node); |
e72763e2 JH |
1712 | if (!opt_for_fn (node->decl, flag_ipa_cp) |
1713 | || !opt_for_fn (node->decl, optimize)) | |
6cf67b62 | 1714 | continue; |
310bc633 | 1715 | int i, count = ipa_get_param_count (info); |
c43f07af | 1716 | |
310bc633 | 1717 | for (i = 0; i < count; i++) |
518dc859 | 1718 | { |
c0cb5055 | 1719 | ipcp_lattice<tree> *lat = ipa_get_scalar_lat (info, i); |
c43f07af | 1720 | |
310bc633 MJ |
1721 | if (!lat->bottom |
1722 | && !lat->contains_variable | |
1723 | && lat->values_count == 0) | |
518dc859 | 1724 | { |
310bc633 | 1725 | if (dump_file) |
518dc859 | 1726 | { |
6c52831d | 1727 | symtab->dump (dump_file); |
310bc633 | 1728 | fprintf (dump_file, "\nIPA lattices after constant " |
5bed50e8 | 1729 | "propagation, before gcc_unreachable:\n"); |
310bc633 | 1730 | print_all_lattices (dump_file, true, false); |
518dc859 | 1731 | } |
3949c4a7 | 1732 | |
310bc633 | 1733 | gcc_unreachable (); |
518dc859 RL |
1734 | } |
1735 | } | |
1736 | } | |
1737 | } | |
1738 | ||
310bc633 MJ |
1739 | /* Return true iff X and Y should be considered equal values by IPA-CP. */ |
1740 | ||
1741 | static bool | |
1742 | values_equal_for_ipcp_p (tree x, tree y) | |
1743 | { | |
1744 | gcc_checking_assert (x != NULL_TREE && y != NULL_TREE); | |
1745 | ||
1746 | if (x == y) | |
1747 | return true; | |
1748 | ||
310bc633 MJ |
1749 | if (TREE_CODE (x) == ADDR_EXPR |
1750 | && TREE_CODE (y) == ADDR_EXPR | |
1751 | && TREE_CODE (TREE_OPERAND (x, 0)) == CONST_DECL | |
1752 | && TREE_CODE (TREE_OPERAND (y, 0)) == CONST_DECL) | |
1753 | return operand_equal_p (DECL_INITIAL (TREE_OPERAND (x, 0)), | |
1754 | DECL_INITIAL (TREE_OPERAND (y, 0)), 0); | |
1755 | else | |
1756 | return operand_equal_p (x, y, 0); | |
1757 | } | |
1758 | ||
44210a96 MJ |
1759 | /* Return true iff X and Y should be considered equal contexts by IPA-CP. */ |
1760 | ||
1761 | static bool | |
1762 | values_equal_for_ipcp_p (ipa_polymorphic_call_context x, | |
1763 | ipa_polymorphic_call_context y) | |
1764 | { | |
1765 | return x.equal_to (y); | |
1766 | } | |
1767 | ||
1768 | ||
c0cb5055 MJ |
1769 | /* Add a new value source to the value represented by THIS, marking that a |
1770 | value comes from edge CS and (if the underlying jump function is a | |
1771 | pass-through or an ancestor one) from a caller value SRC_VAL of a caller | |
1772 | parameter described by SRC_INDEX. OFFSET is negative if the source was the | |
1773 | scalar value of the parameter itself or the offset within an aggregate. */ | |
310bc633 | 1774 | |
c0cb5055 MJ |
1775 | template <typename valtype> |
1776 | void | |
1777 | ipcp_value<valtype>::add_source (cgraph_edge *cs, ipcp_value *src_val, | |
1778 | int src_idx, HOST_WIDE_INT offset) | |
518dc859 | 1779 | { |
c0cb5055 | 1780 | ipcp_value_source<valtype> *src; |
ca30a539 | 1781 | |
2651e637 | 1782 | src = new (ipcp_sources_pool.allocate ()) ipcp_value_source<valtype>; |
2c9561b5 | 1783 | src->offset = offset; |
310bc633 MJ |
1784 | src->cs = cs; |
1785 | src->val = src_val; | |
1786 | src->index = src_idx; | |
fb3f88cc | 1787 | |
c0cb5055 MJ |
1788 | src->next = sources; |
1789 | sources = src; | |
310bc633 MJ |
1790 | } |
1791 | ||
c0cb5055 MJ |
1792 | /* Allocate a new ipcp_value holding a tree constant, initialize its value to |
1793 | SOURCE and clear all other fields. */ | |
310bc633 | 1794 | |
c0cb5055 MJ |
1795 | static ipcp_value<tree> * |
1796 | allocate_and_init_ipcp_value (tree source) | |
310bc633 | 1797 | { |
c0cb5055 | 1798 | ipcp_value<tree> *val; |
310bc633 | 1799 | |
c3684b7b | 1800 | val = new (ipcp_cst_values_pool.allocate ()) ipcp_value<tree>(); |
44210a96 MJ |
1801 | val->value = source; |
1802 | return val; | |
1803 | } | |
1804 | ||
1805 | /* Allocate a new ipcp_value holding a polymorphic context, initialize its | |
1806 | value to SOURCE and clear all other fields. */ | |
1807 | ||
1808 | static ipcp_value<ipa_polymorphic_call_context> * | |
1809 | allocate_and_init_ipcp_value (ipa_polymorphic_call_context source) | |
1810 | { | |
1811 | ipcp_value<ipa_polymorphic_call_context> *val; | |
1812 | ||
2651e637 | 1813 | // TODO |
c3684b7b MS |
1814 | val = new (ipcp_poly_ctx_values_pool.allocate ()) |
1815 | ipcp_value<ipa_polymorphic_call_context>(); | |
c0cb5055 MJ |
1816 | val->value = source; |
1817 | return val; | |
1818 | } | |
1819 | ||
1820 | /* Try to add NEWVAL to LAT, potentially creating a new ipcp_value for it. CS, | |
1821 | SRC_VAL SRC_INDEX and OFFSET are meant for add_source and have the same | |
1822 | meaning. OFFSET -1 means the source is scalar and not a part of an | |
9b14fc33 FX |
1823 | aggregate. If non-NULL, VAL_P records address of existing or newly added |
1824 | ipcp_value. UNLIMITED means whether value count should not exceed the limit | |
1825 | given by PARAM_IPA_CP_VALUE_LIST_SIZE. */ | |
c0cb5055 MJ |
1826 | |
1827 | template <typename valtype> | |
1828 | bool | |
1829 | ipcp_lattice<valtype>::add_value (valtype newval, cgraph_edge *cs, | |
1830 | ipcp_value<valtype> *src_val, | |
9b14fc33 FX |
1831 | int src_idx, HOST_WIDE_INT offset, |
1832 | ipcp_value<valtype> **val_p, | |
1833 | bool unlimited) | |
c0cb5055 | 1834 | { |
9b14fc33 FX |
1835 | ipcp_value<valtype> *val, *last_val = NULL; |
1836 | ||
1837 | if (val_p) | |
1838 | *val_p = NULL; | |
c0cb5055 MJ |
1839 | |
1840 | if (bottom) | |
310bc633 MJ |
1841 | return false; |
1842 | ||
9b14fc33 | 1843 | for (val = values; val; last_val = val, val = val->next) |
310bc633 MJ |
1844 | if (values_equal_for_ipcp_p (val->value, newval)) |
1845 | { | |
9b14fc33 FX |
1846 | if (val_p) |
1847 | *val_p = val; | |
1848 | ||
4cb13597 | 1849 | if (ipa_edge_within_scc (cs)) |
310bc633 | 1850 | { |
c0cb5055 | 1851 | ipcp_value_source<valtype> *s; |
155c9907 | 1852 | for (s = val->sources; s; s = s->next) |
310bc633 MJ |
1853 | if (s->cs == cs) |
1854 | break; | |
1855 | if (s) | |
1856 | return false; | |
1857 | } | |
1858 | ||
c0cb5055 | 1859 | val->add_source (cs, src_val, src_idx, offset); |
310bc633 MJ |
1860 | return false; |
1861 | } | |
1862 | ||
fdfd7f53 ML |
1863 | if (!unlimited && values_count == opt_for_fn (cs->caller->decl, |
1864 | param_ipa_cp_value_list_size)) | |
310bc633 MJ |
1865 | { |
1866 | /* We can only free sources, not the values themselves, because sources | |
026c3cfd | 1867 | of other values in this SCC might point to them. */ |
c0cb5055 | 1868 | for (val = values; val; val = val->next) |
310bc633 MJ |
1869 | { |
1870 | while (val->sources) | |
1871 | { | |
c0cb5055 | 1872 | ipcp_value_source<valtype> *src = val->sources; |
310bc633 | 1873 | val->sources = src->next; |
2651e637 | 1874 | ipcp_sources_pool.remove ((ipcp_value_source<tree>*)src); |
310bc633 MJ |
1875 | } |
1876 | } | |
c0cb5055 MJ |
1877 | values = NULL; |
1878 | return set_to_bottom (); | |
310bc633 MJ |
1879 | } |
1880 | ||
c0cb5055 MJ |
1881 | values_count++; |
1882 | val = allocate_and_init_ipcp_value (newval); | |
1883 | val->add_source (cs, src_val, src_idx, offset); | |
9b14fc33 FX |
1884 | val->next = NULL; |
1885 | ||
1886 | /* Add the new value to end of value list, which can reduce iterations | |
1887 | of propagation stage for recursive function. */ | |
1888 | if (last_val) | |
1889 | last_val->next = val; | |
1890 | else | |
1891 | values = val; | |
1892 | ||
1893 | if (val_p) | |
1894 | *val_p = val; | |
1895 | ||
1896 | return true; | |
1897 | } | |
1898 | ||
1899 | /* Return true, if a ipcp_value VAL is orginated from parameter value of | |
1900 | self-feeding recursive function by applying non-passthrough arithmetic | |
1901 | transformation. */ | |
1902 | ||
1903 | static bool | |
1904 | self_recursively_generated_p (ipcp_value<tree> *val) | |
1905 | { | |
1906 | class ipa_node_params *info = NULL; | |
1907 | ||
1908 | for (ipcp_value_source<tree> *src = val->sources; src; src = src->next) | |
1909 | { | |
1910 | cgraph_edge *cs = src->cs; | |
1911 | ||
1912 | if (!src->val || cs->caller != cs->callee->function_symbol () | |
1913 | || src->val == val) | |
1914 | return false; | |
1915 | ||
1916 | if (!info) | |
1917 | info = IPA_NODE_REF (cs->caller); | |
1918 | ||
1919 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, | |
1920 | src->index); | |
42d73fa9 | 1921 | ipcp_lattice<tree> *src_lat; |
9b14fc33 FX |
1922 | ipcp_value<tree> *src_val; |
1923 | ||
42d73fa9 FX |
1924 | if (src->offset == -1) |
1925 | src_lat = &plats->itself; | |
1926 | else | |
1927 | { | |
1928 | struct ipcp_agg_lattice *src_aglat; | |
1929 | ||
1930 | for (src_aglat = plats->aggs; src_aglat; src_aglat = src_aglat->next) | |
1931 | if (src_aglat->offset == src->offset) | |
1932 | break; | |
1933 | ||
1934 | if (!src_aglat) | |
1935 | return false; | |
1936 | ||
1937 | src_lat = src_aglat; | |
1938 | } | |
1939 | ||
9b14fc33 FX |
1940 | for (src_val = src_lat->values; src_val; src_val = src_val->next) |
1941 | if (src_val == val) | |
1942 | break; | |
1943 | ||
1944 | if (!src_val) | |
1945 | return false; | |
1946 | } | |
1947 | ||
310bc633 MJ |
1948 | return true; |
1949 | } | |
fb3f88cc | 1950 | |
9b14fc33 FX |
1951 | /* A helper function that returns result of operation specified by OPCODE on |
1952 | the value of SRC_VAL. If non-NULL, OPND1_TYPE is expected type for the | |
1953 | value of SRC_VAL. If the operation is binary, OPND2 is a constant value | |
1954 | acting as its second operand. If non-NULL, RES_TYPE is expected type of | |
1955 | the result. */ | |
1956 | ||
1957 | static tree | |
1958 | get_val_across_arith_op (enum tree_code opcode, | |
1959 | tree opnd1_type, | |
1960 | tree opnd2, | |
1961 | ipcp_value<tree> *src_val, | |
1962 | tree res_type) | |
1963 | { | |
1964 | tree opnd1 = src_val->value; | |
1965 | ||
1966 | /* Skip source values that is incompatible with specified type. */ | |
1967 | if (opnd1_type | |
1968 | && !useless_type_conversion_p (opnd1_type, TREE_TYPE (opnd1))) | |
1969 | return NULL_TREE; | |
1970 | ||
1971 | return ipa_get_jf_arith_result (opcode, opnd1, opnd2, res_type); | |
1972 | } | |
1973 | ||
eb270950 FX |
1974 | /* Propagate values through an arithmetic transformation described by a jump |
1975 | function associated with edge CS, taking values from SRC_LAT and putting | |
1976 | them into DEST_LAT. OPND1_TYPE is expected type for the values in SRC_LAT. | |
1977 | OPND2 is a constant value if transformation is a binary operation. | |
1978 | SRC_OFFSET specifies offset in an aggregate if SRC_LAT describes lattice of | |
1979 | a part of the aggregate. SRC_IDX is the index of the source parameter. | |
1980 | RES_TYPE is the value type of result being propagated into. Return true if | |
1981 | DEST_LAT changed. */ | |
310bc633 MJ |
1982 | |
1983 | static bool | |
eb270950 FX |
1984 | propagate_vals_across_arith_jfunc (cgraph_edge *cs, |
1985 | enum tree_code opcode, | |
1986 | tree opnd1_type, | |
1987 | tree opnd2, | |
1988 | ipcp_lattice<tree> *src_lat, | |
1989 | ipcp_lattice<tree> *dest_lat, | |
1990 | HOST_WIDE_INT src_offset, | |
1991 | int src_idx, | |
1992 | tree res_type) | |
310bc633 | 1993 | { |
c0cb5055 | 1994 | ipcp_value<tree> *src_val; |
310bc633 MJ |
1995 | bool ret = false; |
1996 | ||
9b14fc33 FX |
1997 | /* Due to circular dependencies, propagating within an SCC through arithmetic |
1998 | transformation would create infinite number of values. But for | |
1999 | self-feeding recursive function, we could allow propagation in a limited | |
2000 | count, and this can enable a simple kind of recursive function versioning. | |
2001 | For other scenario, we would just make lattices bottom. */ | |
eb270950 | 2002 | if (opcode != NOP_EXPR && ipa_edge_within_scc (cs)) |
9b14fc33 FX |
2003 | { |
2004 | int i; | |
2005 | ||
fdfd7f53 ML |
2006 | int max_recursive_depth = opt_for_fn(cs->caller->decl, |
2007 | param_ipa_cp_max_recursive_depth); | |
2008 | if (src_lat != dest_lat || max_recursive_depth < 1) | |
9b14fc33 FX |
2009 | return dest_lat->set_contains_variable (); |
2010 | ||
2011 | /* No benefit if recursive execution is in low probability. */ | |
2012 | if (cs->sreal_frequency () * 100 | |
fdfd7f53 ML |
2013 | <= ((sreal) 1) * opt_for_fn (cs->caller->decl, |
2014 | param_ipa_cp_min_recursive_probability)) | |
9b14fc33 FX |
2015 | return dest_lat->set_contains_variable (); |
2016 | ||
2017 | auto_vec<ipcp_value<tree> *, 8> val_seeds; | |
2018 | ||
2019 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
2020 | { | |
2021 | /* Now we do not use self-recursively generated value as propagation | |
2022 | source, this is absolutely conservative, but could avoid explosion | |
2023 | of lattice's value space, especially when one recursive function | |
2024 | calls another recursive. */ | |
2025 | if (self_recursively_generated_p (src_val)) | |
2026 | { | |
2027 | ipcp_value_source<tree> *s; | |
2028 | ||
2029 | /* If the lattice has already been propagated for the call site, | |
2030 | no need to do that again. */ | |
2031 | for (s = src_val->sources; s; s = s->next) | |
2032 | if (s->cs == cs) | |
2033 | return dest_lat->set_contains_variable (); | |
2034 | } | |
2035 | else | |
2036 | val_seeds.safe_push (src_val); | |
2037 | } | |
2038 | ||
42d73fa9 FX |
2039 | gcc_assert ((int) val_seeds.length () <= param_ipa_cp_value_list_size); |
2040 | ||
9b14fc33 FX |
2041 | /* Recursively generate lattice values with a limited count. */ |
2042 | FOR_EACH_VEC_ELT (val_seeds, i, src_val) | |
2043 | { | |
fdfd7f53 | 2044 | for (int j = 1; j < max_recursive_depth; j++) |
9b14fc33 FX |
2045 | { |
2046 | tree cstval = get_val_across_arith_op (opcode, opnd1_type, opnd2, | |
2047 | src_val, res_type); | |
2048 | if (!cstval) | |
2049 | break; | |
2050 | ||
2051 | ret |= dest_lat->add_value (cstval, cs, src_val, src_idx, | |
2052 | src_offset, &src_val, true); | |
2053 | gcc_checking_assert (src_val); | |
2054 | } | |
2055 | } | |
2056 | ret |= dest_lat->set_contains_variable (); | |
2057 | } | |
310bc633 MJ |
2058 | else |
2059 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
0818c24c | 2060 | { |
9b14fc33 FX |
2061 | /* Now we do not use self-recursively generated value as propagation |
2062 | source, otherwise it is easy to make value space of normal lattice | |
2063 | overflow. */ | |
2064 | if (self_recursively_generated_p (src_val)) | |
2065 | { | |
2066 | ret |= dest_lat->set_contains_variable (); | |
2067 | continue; | |
2068 | } | |
310bc633 | 2069 | |
9b14fc33 FX |
2070 | tree cstval = get_val_across_arith_op (opcode, opnd1_type, opnd2, |
2071 | src_val, res_type); | |
310bc633 | 2072 | if (cstval) |
eb270950 FX |
2073 | ret |= dest_lat->add_value (cstval, cs, src_val, src_idx, |
2074 | src_offset); | |
310bc633 | 2075 | else |
c0cb5055 | 2076 | ret |= dest_lat->set_contains_variable (); |
0818c24c | 2077 | } |
310bc633 MJ |
2078 | |
2079 | return ret; | |
2080 | } | |
2081 | ||
eb270950 FX |
2082 | /* Propagate values through a pass-through jump function JFUNC associated with |
2083 | edge CS, taking values from SRC_LAT and putting them into DEST_LAT. SRC_IDX | |
2084 | is the index of the source parameter. PARM_TYPE is the type of the | |
2085 | parameter to which the result is passed. */ | |
2086 | ||
2087 | static bool | |
2088 | propagate_vals_across_pass_through (cgraph_edge *cs, ipa_jump_func *jfunc, | |
2089 | ipcp_lattice<tree> *src_lat, | |
2090 | ipcp_lattice<tree> *dest_lat, int src_idx, | |
2091 | tree parm_type) | |
2092 | { | |
2093 | return propagate_vals_across_arith_jfunc (cs, | |
2094 | ipa_get_jf_pass_through_operation (jfunc), | |
2095 | NULL_TREE, | |
2096 | ipa_get_jf_pass_through_operand (jfunc), | |
2097 | src_lat, dest_lat, -1, src_idx, parm_type); | |
2098 | } | |
2099 | ||
310bc633 MJ |
2100 | /* Propagate values through an ancestor jump function JFUNC associated with |
2101 | edge CS, taking values from SRC_LAT and putting them into DEST_LAT. SRC_IDX | |
2102 | is the index of the source parameter. */ | |
2103 | ||
2104 | static bool | |
155c9907 JJ |
2105 | propagate_vals_across_ancestor (struct cgraph_edge *cs, |
2106 | struct ipa_jump_func *jfunc, | |
2107 | ipcp_lattice<tree> *src_lat, | |
2108 | ipcp_lattice<tree> *dest_lat, int src_idx) | |
310bc633 | 2109 | { |
c0cb5055 | 2110 | ipcp_value<tree> *src_val; |
310bc633 MJ |
2111 | bool ret = false; |
2112 | ||
4cb13597 | 2113 | if (ipa_edge_within_scc (cs)) |
c0cb5055 | 2114 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2115 | |
2116 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
2117 | { | |
7b872d9e | 2118 | tree t = ipa_get_jf_ancestor_result (jfunc, src_val->value); |
310bc633 MJ |
2119 | |
2120 | if (t) | |
c0cb5055 | 2121 | ret |= dest_lat->add_value (t, cs, src_val, src_idx); |
310bc633 | 2122 | else |
c0cb5055 | 2123 | ret |= dest_lat->set_contains_variable (); |
310bc633 MJ |
2124 | } |
2125 | ||
2126 | return ret; | |
2127 | } | |
2128 | ||
2c9561b5 | 2129 | /* Propagate scalar values across jump function JFUNC that is associated with |
e5cf5e11 PK |
2130 | edge CS and put the values into DEST_LAT. PARM_TYPE is the type of the |
2131 | parameter to which the result is passed. */ | |
310bc633 MJ |
2132 | |
2133 | static bool | |
155c9907 JJ |
2134 | propagate_scalar_across_jump_function (struct cgraph_edge *cs, |
2135 | struct ipa_jump_func *jfunc, | |
e5cf5e11 PK |
2136 | ipcp_lattice<tree> *dest_lat, |
2137 | tree param_type) | |
310bc633 MJ |
2138 | { |
2139 | if (dest_lat->bottom) | |
2140 | return false; | |
2141 | ||
44210a96 | 2142 | if (jfunc->type == IPA_JF_CONST) |
310bc633 | 2143 | { |
44210a96 | 2144 | tree val = ipa_get_jf_constant (jfunc); |
c0cb5055 | 2145 | return dest_lat->add_value (val, cs, NULL, 0); |
310bc633 MJ |
2146 | } |
2147 | else if (jfunc->type == IPA_JF_PASS_THROUGH | |
2148 | || jfunc->type == IPA_JF_ANCESTOR) | |
2149 | { | |
99b1c316 | 2150 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
c0cb5055 | 2151 | ipcp_lattice<tree> *src_lat; |
310bc633 MJ |
2152 | int src_idx; |
2153 | bool ret; | |
2154 | ||
2155 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
7b872d9e | 2156 | src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
310bc633 | 2157 | else |
7b872d9e | 2158 | src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
310bc633 | 2159 | |
2c9561b5 | 2160 | src_lat = ipa_get_scalar_lat (caller_info, src_idx); |
310bc633 | 2161 | if (src_lat->bottom) |
c0cb5055 | 2162 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2163 | |
2164 | /* If we would need to clone the caller and cannot, do not propagate. */ | |
2165 | if (!ipcp_versionable_function_p (cs->caller) | |
2166 | && (src_lat->contains_variable | |
2167 | || (src_lat->values_count > 1))) | |
c0cb5055 | 2168 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2169 | |
2170 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
155c9907 | 2171 | ret = propagate_vals_across_pass_through (cs, jfunc, src_lat, |
e5cf5e11 | 2172 | dest_lat, src_idx, param_type); |
310bc633 | 2173 | else |
155c9907 JJ |
2174 | ret = propagate_vals_across_ancestor (cs, jfunc, src_lat, dest_lat, |
2175 | src_idx); | |
310bc633 MJ |
2176 | |
2177 | if (src_lat->contains_variable) | |
c0cb5055 | 2178 | ret |= dest_lat->set_contains_variable (); |
310bc633 MJ |
2179 | |
2180 | return ret; | |
2181 | } | |
2182 | ||
2183 | /* TODO: We currently do not handle member method pointers in IPA-CP (we only | |
2184 | use it for indirect inlining), we should propagate them too. */ | |
c0cb5055 | 2185 | return dest_lat->set_contains_variable (); |
310bc633 MJ |
2186 | } |
2187 | ||
44210a96 MJ |
2188 | /* Propagate scalar values across jump function JFUNC that is associated with |
2189 | edge CS and describes argument IDX and put the values into DEST_LAT. */ | |
2190 | ||
2191 | static bool | |
155c9907 | 2192 | propagate_context_across_jump_function (cgraph_edge *cs, |
44210a96 MJ |
2193 | ipa_jump_func *jfunc, int idx, |
2194 | ipcp_lattice<ipa_polymorphic_call_context> *dest_lat) | |
2195 | { | |
2196 | ipa_edge_args *args = IPA_EDGE_REF (cs); | |
2197 | if (dest_lat->bottom) | |
2198 | return false; | |
2199 | bool ret = false; | |
2200 | bool added_sth = false; | |
df0d8136 | 2201 | bool type_preserved = true; |
44210a96 MJ |
2202 | |
2203 | ipa_polymorphic_call_context edge_ctx, *edge_ctx_ptr | |
2204 | = ipa_get_ith_polymorhic_call_context (args, idx); | |
2205 | ||
2206 | if (edge_ctx_ptr) | |
df0d8136 | 2207 | edge_ctx = *edge_ctx_ptr; |
44210a96 MJ |
2208 | |
2209 | if (jfunc->type == IPA_JF_PASS_THROUGH | |
2210 | || jfunc->type == IPA_JF_ANCESTOR) | |
2211 | { | |
99b1c316 | 2212 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
44210a96 MJ |
2213 | int src_idx; |
2214 | ipcp_lattice<ipa_polymorphic_call_context> *src_lat; | |
2215 | ||
2216 | /* TODO: Once we figure out how to propagate speculations, it will | |
2217 | probably be a good idea to switch to speculation if type_preserved is | |
2218 | not set instead of punting. */ | |
2219 | if (jfunc->type == IPA_JF_PASS_THROUGH) | |
2220 | { | |
df0d8136 | 2221 | if (ipa_get_jf_pass_through_operation (jfunc) != NOP_EXPR) |
44210a96 | 2222 | goto prop_fail; |
df0d8136 | 2223 | type_preserved = ipa_get_jf_pass_through_type_preserved (jfunc); |
44210a96 MJ |
2224 | src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
2225 | } | |
2226 | else | |
2227 | { | |
df0d8136 | 2228 | type_preserved = ipa_get_jf_ancestor_type_preserved (jfunc); |
44210a96 MJ |
2229 | src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
2230 | } | |
2231 | ||
2232 | src_lat = ipa_get_poly_ctx_lat (caller_info, src_idx); | |
2233 | /* If we would need to clone the caller and cannot, do not propagate. */ | |
2234 | if (!ipcp_versionable_function_p (cs->caller) | |
2235 | && (src_lat->contains_variable | |
2236 | || (src_lat->values_count > 1))) | |
2237 | goto prop_fail; | |
44210a96 MJ |
2238 | |
2239 | ipcp_value<ipa_polymorphic_call_context> *src_val; | |
2240 | for (src_val = src_lat->values; src_val; src_val = src_val->next) | |
2241 | { | |
2242 | ipa_polymorphic_call_context cur = src_val->value; | |
df0d8136 JH |
2243 | |
2244 | if (!type_preserved) | |
2245 | cur.possible_dynamic_type_change (cs->in_polymorphic_cdtor); | |
44210a96 MJ |
2246 | if (jfunc->type == IPA_JF_ANCESTOR) |
2247 | cur.offset_by (ipa_get_jf_ancestor_offset (jfunc)); | |
df0d8136 JH |
2248 | /* TODO: In cases we know how the context is going to be used, |
2249 | we can improve the result by passing proper OTR_TYPE. */ | |
2250 | cur.combine_with (edge_ctx); | |
44210a96 MJ |
2251 | if (!cur.useless_p ()) |
2252 | { | |
df0d8136 JH |
2253 | if (src_lat->contains_variable |
2254 | && !edge_ctx.equal_to (cur)) | |
2255 | ret |= dest_lat->set_contains_variable (); | |
44210a96 MJ |
2256 | ret |= dest_lat->add_value (cur, cs, src_val, src_idx); |
2257 | added_sth = true; | |
2258 | } | |
2259 | } | |
44210a96 MJ |
2260 | } |
2261 | ||
2262 | prop_fail: | |
2263 | if (!added_sth) | |
2264 | { | |
2265 | if (!edge_ctx.useless_p ()) | |
2266 | ret |= dest_lat->add_value (edge_ctx, cs); | |
2267 | else | |
2268 | ret |= dest_lat->set_contains_variable (); | |
2269 | } | |
2270 | ||
2271 | return ret; | |
2272 | } | |
2273 | ||
209ca542 PK |
2274 | /* Propagate bits across jfunc that is associated with |
2275 | edge cs and update dest_lattice accordingly. */ | |
2276 | ||
2277 | bool | |
155c9907 JJ |
2278 | propagate_bits_across_jump_function (cgraph_edge *cs, int idx, |
2279 | ipa_jump_func *jfunc, | |
2280 | ipcp_bits_lattice *dest_lattice) | |
209ca542 PK |
2281 | { |
2282 | if (dest_lattice->bottom_p ()) | |
2283 | return false; | |
2284 | ||
2285 | enum availability availability; | |
2286 | cgraph_node *callee = cs->callee->function_symbol (&availability); | |
99b1c316 | 2287 | class ipa_node_params *callee_info = IPA_NODE_REF (callee); |
209ca542 PK |
2288 | tree parm_type = ipa_get_type (callee_info, idx); |
2289 | ||
b93f25ad ML |
2290 | /* For K&R C programs, ipa_get_type() could return NULL_TREE. Avoid the |
2291 | transform for these cases. Similarly, we can have bad type mismatches | |
2292 | with LTO, avoid doing anything with those too. */ | |
2293 | if (!parm_type | |
2294 | || (!INTEGRAL_TYPE_P (parm_type) && !POINTER_TYPE_P (parm_type))) | |
209ca542 PK |
2295 | { |
2296 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
b93f25ad ML |
2297 | fprintf (dump_file, "Setting dest_lattice to bottom, because type of " |
2298 | "param %i of %s is NULL or unsuitable for bits propagation\n", | |
3629ff8a | 2299 | idx, cs->callee->dump_name ()); |
209ca542 PK |
2300 | |
2301 | return dest_lattice->set_to_bottom (); | |
2302 | } | |
2303 | ||
2304 | unsigned precision = TYPE_PRECISION (parm_type); | |
2305 | signop sgn = TYPE_SIGN (parm_type); | |
2306 | ||
67b97478 PK |
2307 | if (jfunc->type == IPA_JF_PASS_THROUGH |
2308 | || jfunc->type == IPA_JF_ANCESTOR) | |
209ca542 | 2309 | { |
99b1c316 | 2310 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
209ca542 | 2311 | tree operand = NULL_TREE; |
67b97478 PK |
2312 | enum tree_code code; |
2313 | unsigned src_idx; | |
209ca542 | 2314 | |
67b97478 PK |
2315 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
2316 | { | |
2317 | code = ipa_get_jf_pass_through_operation (jfunc); | |
2318 | src_idx = ipa_get_jf_pass_through_formal_id (jfunc); | |
2319 | if (code != NOP_EXPR) | |
2320 | operand = ipa_get_jf_pass_through_operand (jfunc); | |
2321 | } | |
2322 | else | |
2323 | { | |
155c9907 | 2324 | code = POINTER_PLUS_EXPR; |
67b97478 PK |
2325 | src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
2326 | unsigned HOST_WIDE_INT offset = ipa_get_jf_ancestor_offset (jfunc) / BITS_PER_UNIT; | |
2327 | operand = build_int_cstu (size_type_node, offset); | |
2328 | } | |
209ca542 | 2329 | |
99b1c316 | 2330 | class ipcp_param_lattices *src_lats |
209ca542 PK |
2331 | = ipa_get_parm_lattices (caller_info, src_idx); |
2332 | ||
2333 | /* Try to propagate bits if src_lattice is bottom, but jfunc is known. | |
2334 | for eg consider: | |
2335 | int f(int x) | |
2336 | { | |
2337 | g (x & 0xff); | |
2338 | } | |
2339 | Assume lattice for x is bottom, however we can still propagate | |
2340 | result of x & 0xff == 0xff, which gets computed during ccp1 pass | |
2341 | and we store it in jump function during analysis stage. */ | |
2342 | ||
2343 | if (src_lats->bits_lattice.bottom_p () | |
86cd0334 MJ |
2344 | && jfunc->bits) |
2345 | return dest_lattice->meet_with (jfunc->bits->value, jfunc->bits->mask, | |
209ca542 PK |
2346 | precision); |
2347 | else | |
2348 | return dest_lattice->meet_with (src_lats->bits_lattice, precision, sgn, | |
2349 | code, operand); | |
2350 | } | |
2351 | ||
2352 | else if (jfunc->type == IPA_JF_ANCESTOR) | |
2353 | return dest_lattice->set_to_bottom (); | |
86cd0334 MJ |
2354 | else if (jfunc->bits) |
2355 | return dest_lattice->meet_with (jfunc->bits->value, jfunc->bits->mask, | |
2356 | precision); | |
209ca542 PK |
2357 | else |
2358 | return dest_lattice->set_to_bottom (); | |
2359 | } | |
2360 | ||
8bc5448f | 2361 | /* Propagate value range across jump function JFUNC that is associated with |
5d5f1e95 KV |
2362 | edge CS with param of callee of PARAM_TYPE and update DEST_PLATS |
2363 | accordingly. */ | |
8bc5448f KV |
2364 | |
2365 | static bool | |
155c9907 | 2366 | propagate_vr_across_jump_function (cgraph_edge *cs, ipa_jump_func *jfunc, |
99b1c316 | 2367 | class ipcp_param_lattices *dest_plats, |
155c9907 | 2368 | tree param_type) |
8bc5448f | 2369 | { |
8bc5448f KV |
2370 | ipcp_vr_lattice *dest_lat = &dest_plats->m_value_range; |
2371 | ||
2372 | if (dest_lat->bottom_p ()) | |
2373 | return false; | |
2374 | ||
5d5f1e95 KV |
2375 | if (!param_type |
2376 | || (!INTEGRAL_TYPE_P (param_type) | |
2377 | && !POINTER_TYPE_P (param_type))) | |
2378 | return dest_lat->set_to_bottom (); | |
2379 | ||
8bc5448f KV |
2380 | if (jfunc->type == IPA_JF_PASS_THROUGH) |
2381 | { | |
a5e14a42 | 2382 | enum tree_code operation = ipa_get_jf_pass_through_operation (jfunc); |
2b89b748 JH |
2383 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
2384 | int src_idx = ipa_get_jf_pass_through_formal_id (jfunc); | |
2385 | class ipcp_param_lattices *src_lats | |
2386 | = ipa_get_parm_lattices (caller_info, src_idx); | |
2387 | tree operand_type = ipa_get_type (caller_info, src_idx); | |
8bc5448f | 2388 | |
2b89b748 JH |
2389 | if (src_lats->m_value_range.bottom_p ()) |
2390 | return dest_lat->set_to_bottom (); | |
2391 | ||
2392 | value_range vr; | |
a5e14a42 | 2393 | if (TREE_CODE_CLASS (operation) == tcc_unary) |
27f418b8 JJ |
2394 | ipa_vr_operation_and_type_effects (&vr, |
2395 | &src_lats->m_value_range.m_vr, | |
2396 | operation, param_type, | |
2397 | operand_type); | |
2b89b748 JH |
2398 | /* A crude way to prevent unbounded number of value range updates |
2399 | in SCC components. We should allow limited number of updates within | |
2400 | SCC, too. */ | |
2401 | else if (!ipa_edge_within_scc (cs)) | |
2402 | { | |
2403 | tree op = ipa_get_jf_pass_through_operand (jfunc); | |
2404 | value_range op_vr (op, op); | |
2405 | value_range op_res,res; | |
2406 | ||
2407 | range_fold_binary_expr (&op_res, operation, operand_type, | |
2408 | &src_lats->m_value_range.m_vr, &op_vr); | |
2409 | ipa_vr_operation_and_type_effects (&vr, | |
2410 | &op_res, | |
2411 | NOP_EXPR, param_type, | |
2412 | operand_type); | |
2413 | } | |
2414 | if (!vr.undefined_p () && !vr.varying_p ()) | |
2415 | { | |
2416 | if (jfunc->m_vr) | |
2417 | { | |
2418 | value_range jvr; | |
2419 | if (ipa_vr_operation_and_type_effects (&jvr, jfunc->m_vr, | |
2420 | NOP_EXPR, | |
2421 | param_type, | |
2422 | jfunc->m_vr->type ())) | |
27f418b8 | 2423 | vr.intersect (jvr); |
2b89b748 JH |
2424 | } |
2425 | return dest_lat->meet_with (&vr); | |
a2b4c188 | 2426 | } |
8bc5448f KV |
2427 | } |
2428 | else if (jfunc->type == IPA_JF_CONST) | |
2429 | { | |
2430 | tree val = ipa_get_jf_constant (jfunc); | |
2431 | if (TREE_CODE (val) == INTEGER_CST) | |
2432 | { | |
7d22d5a3 | 2433 | val = fold_convert (param_type, val); |
1e401340 KV |
2434 | if (TREE_OVERFLOW_P (val)) |
2435 | val = drop_tree_overflow (val); | |
86cd0334 | 2436 | |
5d462877 | 2437 | value_range tmpvr (val, val); |
86cd0334 | 2438 | return dest_lat->meet_with (&tmpvr); |
8bc5448f KV |
2439 | } |
2440 | } | |
2441 | ||
028d81b1 | 2442 | value_range vr; |
86cd0334 MJ |
2443 | if (jfunc->m_vr |
2444 | && ipa_vr_operation_and_type_effects (&vr, jfunc->m_vr, NOP_EXPR, | |
a5e14a42 | 2445 | param_type, |
54994253 | 2446 | jfunc->m_vr->type ())) |
a5e14a42 | 2447 | return dest_lat->meet_with (&vr); |
8bc5448f KV |
2448 | else |
2449 | return dest_lat->set_to_bottom (); | |
2450 | } | |
2451 | ||
2c9561b5 MJ |
2452 | /* If DEST_PLATS already has aggregate items, check that aggs_by_ref matches |
2453 | NEW_AGGS_BY_REF and if not, mark all aggs as bottoms and return true (in all | |
2454 | other cases, return false). If there are no aggregate items, set | |
2455 | aggs_by_ref to NEW_AGGS_BY_REF. */ | |
2456 | ||
2457 | static bool | |
99b1c316 | 2458 | set_check_aggs_by_ref (class ipcp_param_lattices *dest_plats, |
2c9561b5 MJ |
2459 | bool new_aggs_by_ref) |
2460 | { | |
2461 | if (dest_plats->aggs) | |
2462 | { | |
2463 | if (dest_plats->aggs_by_ref != new_aggs_by_ref) | |
2464 | { | |
2465 | set_agg_lats_to_bottom (dest_plats); | |
2466 | return true; | |
2467 | } | |
2468 | } | |
2469 | else | |
2470 | dest_plats->aggs_by_ref = new_aggs_by_ref; | |
2471 | return false; | |
2472 | } | |
2473 | ||
2474 | /* Walk aggregate lattices in DEST_PLATS from ***AGLAT on, until ***aglat is an | |
2475 | already existing lattice for the given OFFSET and SIZE, marking all skipped | |
2476 | lattices as containing variable and checking for overlaps. If there is no | |
2477 | already existing lattice for the OFFSET and VAL_SIZE, create one, initialize | |
2478 | it with offset, size and contains_variable to PRE_EXISTING, and return true, | |
2479 | unless there are too many already. If there are two many, return false. If | |
2480 | there are overlaps turn whole DEST_PLATS to bottom and return false. If any | |
2481 | skipped lattices were newly marked as containing variable, set *CHANGE to | |
de2e0835 | 2482 | true. MAX_AGG_ITEMS is the maximum number of lattices. */ |
2c9561b5 MJ |
2483 | |
2484 | static bool | |
99b1c316 | 2485 | merge_agg_lats_step (class ipcp_param_lattices *dest_plats, |
2c9561b5 MJ |
2486 | HOST_WIDE_INT offset, HOST_WIDE_INT val_size, |
2487 | struct ipcp_agg_lattice ***aglat, | |
de2e0835 | 2488 | bool pre_existing, bool *change, int max_agg_items) |
2c9561b5 MJ |
2489 | { |
2490 | gcc_checking_assert (offset >= 0); | |
2491 | ||
2492 | while (**aglat && (**aglat)->offset < offset) | |
2493 | { | |
2494 | if ((**aglat)->offset + (**aglat)->size > offset) | |
2495 | { | |
2496 | set_agg_lats_to_bottom (dest_plats); | |
2497 | return false; | |
2498 | } | |
c0cb5055 | 2499 | *change |= (**aglat)->set_contains_variable (); |
2c9561b5 MJ |
2500 | *aglat = &(**aglat)->next; |
2501 | } | |
2502 | ||
2503 | if (**aglat && (**aglat)->offset == offset) | |
2504 | { | |
b66113e9 | 2505 | if ((**aglat)->size != val_size) |
2c9561b5 MJ |
2506 | { |
2507 | set_agg_lats_to_bottom (dest_plats); | |
2508 | return false; | |
2509 | } | |
b66113e9 MJ |
2510 | gcc_assert (!(**aglat)->next |
2511 | || (**aglat)->next->offset >= offset + val_size); | |
2c9561b5 MJ |
2512 | return true; |
2513 | } | |
2514 | else | |
2515 | { | |
2516 | struct ipcp_agg_lattice *new_al; | |
2517 | ||
2518 | if (**aglat && (**aglat)->offset < offset + val_size) | |
2519 | { | |
2520 | set_agg_lats_to_bottom (dest_plats); | |
2521 | return false; | |
2522 | } | |
de2e0835 | 2523 | if (dest_plats->aggs_count == max_agg_items) |
2c9561b5 MJ |
2524 | return false; |
2525 | dest_plats->aggs_count++; | |
2651e637 | 2526 | new_al = ipcp_agg_lattice_pool.allocate (); |
2c9561b5 MJ |
2527 | memset (new_al, 0, sizeof (*new_al)); |
2528 | ||
2529 | new_al->offset = offset; | |
2530 | new_al->size = val_size; | |
2531 | new_al->contains_variable = pre_existing; | |
2532 | ||
2533 | new_al->next = **aglat; | |
2534 | **aglat = new_al; | |
2535 | return true; | |
2536 | } | |
2537 | } | |
2538 | ||
2539 | /* Set all AGLAT and all other aggregate lattices reachable by next pointers as | |
2540 | containing an unknown value. */ | |
2541 | ||
2542 | static bool | |
2543 | set_chain_of_aglats_contains_variable (struct ipcp_agg_lattice *aglat) | |
2544 | { | |
2545 | bool ret = false; | |
2546 | while (aglat) | |
2547 | { | |
c0cb5055 | 2548 | ret |= aglat->set_contains_variable (); |
2c9561b5 MJ |
2549 | aglat = aglat->next; |
2550 | } | |
2551 | return ret; | |
2552 | } | |
2553 | ||
2554 | /* Merge existing aggregate lattices in SRC_PLATS to DEST_PLATS, subtracting | |
2555 | DELTA_OFFSET. CS is the call graph edge and SRC_IDX the index of the source | |
2556 | parameter used for lattice value sources. Return true if DEST_PLATS changed | |
2557 | in any way. */ | |
2558 | ||
2559 | static bool | |
2560 | merge_aggregate_lattices (struct cgraph_edge *cs, | |
99b1c316 MS |
2561 | class ipcp_param_lattices *dest_plats, |
2562 | class ipcp_param_lattices *src_plats, | |
2c9561b5 MJ |
2563 | int src_idx, HOST_WIDE_INT offset_delta) |
2564 | { | |
2565 | bool pre_existing = dest_plats->aggs != NULL; | |
2566 | struct ipcp_agg_lattice **dst_aglat; | |
2567 | bool ret = false; | |
2568 | ||
2569 | if (set_check_aggs_by_ref (dest_plats, src_plats->aggs_by_ref)) | |
2570 | return true; | |
2571 | if (src_plats->aggs_bottom) | |
2572 | return set_agg_lats_contain_variable (dest_plats); | |
3e452a28 MJ |
2573 | if (src_plats->aggs_contain_variable) |
2574 | ret |= set_agg_lats_contain_variable (dest_plats); | |
2c9561b5 MJ |
2575 | dst_aglat = &dest_plats->aggs; |
2576 | ||
de2e0835 MJ |
2577 | int max_agg_items = opt_for_fn (cs->callee->function_symbol ()->decl, |
2578 | param_ipa_max_agg_items); | |
2c9561b5 MJ |
2579 | for (struct ipcp_agg_lattice *src_aglat = src_plats->aggs; |
2580 | src_aglat; | |
2581 | src_aglat = src_aglat->next) | |
2582 | { | |
2583 | HOST_WIDE_INT new_offset = src_aglat->offset - offset_delta; | |
2584 | ||
2585 | if (new_offset < 0) | |
2586 | continue; | |
2587 | if (merge_agg_lats_step (dest_plats, new_offset, src_aglat->size, | |
de2e0835 | 2588 | &dst_aglat, pre_existing, &ret, max_agg_items)) |
2c9561b5 MJ |
2589 | { |
2590 | struct ipcp_agg_lattice *new_al = *dst_aglat; | |
2591 | ||
2592 | dst_aglat = &(*dst_aglat)->next; | |
2593 | if (src_aglat->bottom) | |
2594 | { | |
c0cb5055 | 2595 | ret |= new_al->set_contains_variable (); |
2c9561b5 MJ |
2596 | continue; |
2597 | } | |
2598 | if (src_aglat->contains_variable) | |
c0cb5055 MJ |
2599 | ret |= new_al->set_contains_variable (); |
2600 | for (ipcp_value<tree> *val = src_aglat->values; | |
2c9561b5 MJ |
2601 | val; |
2602 | val = val->next) | |
c0cb5055 MJ |
2603 | ret |= new_al->add_value (val->value, cs, val, src_idx, |
2604 | src_aglat->offset); | |
2c9561b5 MJ |
2605 | } |
2606 | else if (dest_plats->aggs_bottom) | |
2607 | return true; | |
2608 | } | |
2609 | ret |= set_chain_of_aglats_contains_variable (*dst_aglat); | |
2610 | return ret; | |
2611 | } | |
2612 | ||
324e93f1 MJ |
2613 | /* Determine whether there is anything to propagate FROM SRC_PLATS through a |
2614 | pass-through JFUNC and if so, whether it has conform and conforms to the | |
2615 | rules about propagating values passed by reference. */ | |
2616 | ||
2617 | static bool | |
99b1c316 | 2618 | agg_pass_through_permissible_p (class ipcp_param_lattices *src_plats, |
324e93f1 MJ |
2619 | struct ipa_jump_func *jfunc) |
2620 | { | |
2621 | return src_plats->aggs | |
2622 | && (!src_plats->aggs_by_ref | |
2623 | || ipa_get_jf_pass_through_agg_preserved (jfunc)); | |
2624 | } | |
2625 | ||
eb270950 FX |
2626 | /* Propagate values through ITEM, jump function for a part of an aggregate, |
2627 | into corresponding aggregate lattice AGLAT. CS is the call graph edge | |
2628 | associated with the jump function. Return true if AGLAT changed in any | |
2629 | way. */ | |
2630 | ||
2631 | static bool | |
2632 | propagate_aggregate_lattice (struct cgraph_edge *cs, | |
2633 | struct ipa_agg_jf_item *item, | |
2634 | struct ipcp_agg_lattice *aglat) | |
2635 | { | |
2636 | class ipa_node_params *caller_info; | |
2637 | class ipcp_param_lattices *src_plats; | |
2638 | struct ipcp_lattice<tree> *src_lat; | |
2639 | HOST_WIDE_INT src_offset; | |
2640 | int src_idx; | |
2641 | tree load_type; | |
2642 | bool ret; | |
2643 | ||
2644 | if (item->jftype == IPA_JF_CONST) | |
2645 | { | |
2646 | tree value = item->value.constant; | |
2647 | ||
2648 | gcc_checking_assert (is_gimple_ip_invariant (value)); | |
2649 | return aglat->add_value (value, cs, NULL, 0); | |
2650 | } | |
2651 | ||
2652 | gcc_checking_assert (item->jftype == IPA_JF_PASS_THROUGH | |
2653 | || item->jftype == IPA_JF_LOAD_AGG); | |
2654 | ||
2655 | caller_info = IPA_NODE_REF (cs->caller); | |
2656 | src_idx = item->value.pass_through.formal_id; | |
2657 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); | |
2658 | ||
2659 | if (item->jftype == IPA_JF_PASS_THROUGH) | |
2660 | { | |
2661 | load_type = NULL_TREE; | |
2662 | src_lat = &src_plats->itself; | |
2663 | src_offset = -1; | |
2664 | } | |
2665 | else | |
2666 | { | |
2667 | HOST_WIDE_INT load_offset = item->value.load_agg.offset; | |
2668 | struct ipcp_agg_lattice *src_aglat; | |
2669 | ||
2670 | for (src_aglat = src_plats->aggs; src_aglat; src_aglat = src_aglat->next) | |
2671 | if (src_aglat->offset >= load_offset) | |
2672 | break; | |
2673 | ||
2674 | load_type = item->value.load_agg.type; | |
2675 | if (!src_aglat | |
2676 | || src_aglat->offset > load_offset | |
2677 | || src_aglat->size != tree_to_shwi (TYPE_SIZE (load_type)) | |
2678 | || src_plats->aggs_by_ref != item->value.load_agg.by_ref) | |
2679 | return aglat->set_contains_variable (); | |
2680 | ||
2681 | src_lat = src_aglat; | |
2682 | src_offset = load_offset; | |
2683 | } | |
2684 | ||
2685 | if (src_lat->bottom | |
2686 | || (!ipcp_versionable_function_p (cs->caller) | |
2687 | && !src_lat->is_single_const ())) | |
2688 | return aglat->set_contains_variable (); | |
2689 | ||
2690 | ret = propagate_vals_across_arith_jfunc (cs, | |
2691 | item->value.pass_through.operation, | |
2692 | load_type, | |
2693 | item->value.pass_through.operand, | |
2694 | src_lat, aglat, | |
2695 | src_offset, | |
2696 | src_idx, | |
2697 | item->type); | |
2698 | ||
2699 | if (src_lat->contains_variable) | |
2700 | ret |= aglat->set_contains_variable (); | |
2701 | ||
2702 | return ret; | |
2703 | } | |
2704 | ||
2c9561b5 MJ |
2705 | /* Propagate scalar values across jump function JFUNC that is associated with |
2706 | edge CS and put the values into DEST_LAT. */ | |
2707 | ||
2708 | static bool | |
155c9907 JJ |
2709 | propagate_aggs_across_jump_function (struct cgraph_edge *cs, |
2710 | struct ipa_jump_func *jfunc, | |
99b1c316 | 2711 | class ipcp_param_lattices *dest_plats) |
2c9561b5 MJ |
2712 | { |
2713 | bool ret = false; | |
2714 | ||
2715 | if (dest_plats->aggs_bottom) | |
2716 | return false; | |
2717 | ||
2718 | if (jfunc->type == IPA_JF_PASS_THROUGH | |
2719 | && ipa_get_jf_pass_through_operation (jfunc) == NOP_EXPR) | |
2720 | { | |
99b1c316 | 2721 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
2c9561b5 | 2722 | int src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
99b1c316 | 2723 | class ipcp_param_lattices *src_plats; |
2c9561b5 MJ |
2724 | |
2725 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); | |
324e93f1 | 2726 | if (agg_pass_through_permissible_p (src_plats, jfunc)) |
2c9561b5 MJ |
2727 | { |
2728 | /* Currently we do not produce clobber aggregate jump | |
2729 | functions, replace with merging when we do. */ | |
2730 | gcc_assert (!jfunc->agg.items); | |
2731 | ret |= merge_aggregate_lattices (cs, dest_plats, src_plats, | |
2732 | src_idx, 0); | |
2733 | } | |
2734 | else | |
2735 | ret |= set_agg_lats_contain_variable (dest_plats); | |
2736 | } | |
2737 | else if (jfunc->type == IPA_JF_ANCESTOR | |
2738 | && ipa_get_jf_ancestor_agg_preserved (jfunc)) | |
2739 | { | |
99b1c316 | 2740 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
2c9561b5 | 2741 | int src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
99b1c316 | 2742 | class ipcp_param_lattices *src_plats; |
2c9561b5 MJ |
2743 | |
2744 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); | |
2745 | if (src_plats->aggs && src_plats->aggs_by_ref) | |
2746 | { | |
2747 | /* Currently we do not produce clobber aggregate jump | |
2748 | functions, replace with merging when we do. */ | |
2749 | gcc_assert (!jfunc->agg.items); | |
2750 | ret |= merge_aggregate_lattices (cs, dest_plats, src_plats, src_idx, | |
2751 | ipa_get_jf_ancestor_offset (jfunc)); | |
2752 | } | |
2753 | else if (!src_plats->aggs_by_ref) | |
2754 | ret |= set_agg_lats_to_bottom (dest_plats); | |
2755 | else | |
2756 | ret |= set_agg_lats_contain_variable (dest_plats); | |
2757 | } | |
2758 | else if (jfunc->agg.items) | |
2759 | { | |
2760 | bool pre_existing = dest_plats->aggs != NULL; | |
2761 | struct ipcp_agg_lattice **aglat = &dest_plats->aggs; | |
2762 | struct ipa_agg_jf_item *item; | |
2763 | int i; | |
2764 | ||
2765 | if (set_check_aggs_by_ref (dest_plats, jfunc->agg.by_ref)) | |
2766 | return true; | |
2767 | ||
de2e0835 MJ |
2768 | int max_agg_items = opt_for_fn (cs->callee->function_symbol ()->decl, |
2769 | param_ipa_max_agg_items); | |
9771b263 | 2770 | FOR_EACH_VEC_ELT (*jfunc->agg.items, i, item) |
2c9561b5 MJ |
2771 | { |
2772 | HOST_WIDE_INT val_size; | |
2773 | ||
eb270950 | 2774 | if (item->offset < 0 || item->jftype == IPA_JF_UNKNOWN) |
2c9561b5 | 2775 | continue; |
eb270950 | 2776 | val_size = tree_to_shwi (TYPE_SIZE (item->type)); |
2c9561b5 MJ |
2777 | |
2778 | if (merge_agg_lats_step (dest_plats, item->offset, val_size, | |
de2e0835 | 2779 | &aglat, pre_existing, &ret, max_agg_items)) |
2c9561b5 | 2780 | { |
eb270950 | 2781 | ret |= propagate_aggregate_lattice (cs, item, *aglat); |
2c9561b5 MJ |
2782 | aglat = &(*aglat)->next; |
2783 | } | |
2784 | else if (dest_plats->aggs_bottom) | |
2785 | return true; | |
2786 | } | |
2787 | ||
2788 | ret |= set_chain_of_aglats_contains_variable (*aglat); | |
2789 | } | |
2790 | else | |
2791 | ret |= set_agg_lats_contain_variable (dest_plats); | |
2792 | ||
2793 | return ret; | |
2794 | } | |
2795 | ||
173b7355 MJ |
2796 | /* Return true if on the way cfrom CS->caller to the final (non-alias and |
2797 | non-thunk) destination, the call passes through a thunk. */ | |
2798 | ||
2799 | static bool | |
2800 | call_passes_through_thunk_p (cgraph_edge *cs) | |
2801 | { | |
2802 | cgraph_node *alias_or_thunk = cs->callee; | |
2803 | while (alias_or_thunk->alias) | |
2804 | alias_or_thunk = alias_or_thunk->get_alias_target (); | |
2805 | return alias_or_thunk->thunk.thunk_p; | |
2806 | } | |
2807 | ||
310bc633 MJ |
2808 | /* Propagate constants from the caller to the callee of CS. INFO describes the |
2809 | caller. */ | |
2810 | ||
2811 | static bool | |
155c9907 | 2812 | propagate_constants_across_call (struct cgraph_edge *cs) |
310bc633 | 2813 | { |
99b1c316 | 2814 | class ipa_node_params *callee_info; |
310bc633 | 2815 | enum availability availability; |
173b7355 | 2816 | cgraph_node *callee; |
99b1c316 | 2817 | class ipa_edge_args *args; |
310bc633 | 2818 | bool ret = false; |
d7da5cc8 | 2819 | int i, args_count, parms_count; |
310bc633 | 2820 | |
d52f5295 | 2821 | callee = cs->callee->function_symbol (&availability); |
67348ccc | 2822 | if (!callee->definition) |
310bc633 | 2823 | return false; |
d52f5295 | 2824 | gcc_checking_assert (callee->has_gimple_body_p ()); |
310bc633 | 2825 | callee_info = IPA_NODE_REF (callee); |
6cf67b62 JH |
2826 | if (!callee_info) |
2827 | return false; | |
310bc633 MJ |
2828 | |
2829 | args = IPA_EDGE_REF (cs); | |
d7da5cc8 | 2830 | parms_count = ipa_get_param_count (callee_info); |
f3fec19f MJ |
2831 | if (parms_count == 0) |
2832 | return false; | |
e72763e2 JH |
2833 | if (!args |
2834 | || !opt_for_fn (cs->caller->decl, flag_ipa_cp) | |
2835 | || !opt_for_fn (cs->caller->decl, optimize)) | |
a33c028e JH |
2836 | { |
2837 | for (i = 0; i < parms_count; i++) | |
2838 | ret |= set_all_contains_variable (ipa_get_parm_lattices (callee_info, | |
2839 | i)); | |
2840 | return ret; | |
2841 | } | |
2842 | args_count = ipa_get_cs_argument_count (args); | |
310bc633 MJ |
2843 | |
2844 | /* If this call goes through a thunk we must not propagate to the first (0th) | |
2845 | parameter. However, we might need to uncover a thunk from below a series | |
2846 | of aliases first. */ | |
173b7355 | 2847 | if (call_passes_through_thunk_p (cs)) |
310bc633 | 2848 | { |
2c9561b5 MJ |
2849 | ret |= set_all_contains_variable (ipa_get_parm_lattices (callee_info, |
2850 | 0)); | |
310bc633 MJ |
2851 | i = 1; |
2852 | } | |
2853 | else | |
2854 | i = 0; | |
2855 | ||
d7da5cc8 | 2856 | for (; (i < args_count) && (i < parms_count); i++) |
310bc633 MJ |
2857 | { |
2858 | struct ipa_jump_func *jump_func = ipa_get_ith_jump_func (args, i); | |
99b1c316 | 2859 | class ipcp_param_lattices *dest_plats; |
a5e14a42 | 2860 | tree param_type = ipa_get_type (callee_info, i); |
310bc633 | 2861 | |
2c9561b5 | 2862 | dest_plats = ipa_get_parm_lattices (callee_info, i); |
d52f5295 | 2863 | if (availability == AVAIL_INTERPOSABLE) |
2c9561b5 | 2864 | ret |= set_all_contains_variable (dest_plats); |
310bc633 | 2865 | else |
2c9561b5 | 2866 | { |
155c9907 | 2867 | ret |= propagate_scalar_across_jump_function (cs, jump_func, |
e5cf5e11 PK |
2868 | &dest_plats->itself, |
2869 | param_type); | |
155c9907 JJ |
2870 | ret |= propagate_context_across_jump_function (cs, jump_func, i, |
2871 | &dest_plats->ctxlat); | |
2872 | ret | |
2873 | |= propagate_bits_across_jump_function (cs, i, jump_func, | |
2874 | &dest_plats->bits_lattice); | |
2875 | ret |= propagate_aggs_across_jump_function (cs, jump_func, | |
2876 | dest_plats); | |
8bc5448f | 2877 | if (opt_for_fn (callee->decl, flag_ipa_vrp)) |
155c9907 JJ |
2878 | ret |= propagate_vr_across_jump_function (cs, jump_func, |
2879 | dest_plats, param_type); | |
8bc5448f KV |
2880 | else |
2881 | ret |= dest_plats->m_value_range.set_to_bottom (); | |
2c9561b5 | 2882 | } |
310bc633 | 2883 | } |
d7da5cc8 | 2884 | for (; i < parms_count; i++) |
2c9561b5 | 2885 | ret |= set_all_contains_variable (ipa_get_parm_lattices (callee_info, i)); |
d7da5cc8 | 2886 | |
310bc633 MJ |
2887 | return ret; |
2888 | } | |
2889 | ||
2890 | /* If an indirect edge IE can be turned into a direct one based on KNOWN_VALS | |
3b97a5c7 MJ |
2891 | KNOWN_CONTEXTS, KNOWN_AGGS or AGG_REPS return the destination. The latter |
2892 | three can be NULL. If AGG_REPS is not NULL, KNOWN_AGGS is ignored. */ | |
310bc633 | 2893 | |
162712de MJ |
2894 | static tree |
2895 | ipa_get_indirect_edge_target_1 (struct cgraph_edge *ie, | |
44210a96 MJ |
2896 | vec<tree> known_csts, |
2897 | vec<ipa_polymorphic_call_context> known_contexts, | |
eb270950 | 2898 | vec<ipa_agg_value_set> known_aggs, |
231b4916 JH |
2899 | struct ipa_agg_replacement_value *agg_reps, |
2900 | bool *speculative) | |
310bc633 MJ |
2901 | { |
2902 | int param_index = ie->indirect_info->param_index; | |
44210a96 | 2903 | HOST_WIDE_INT anc_offset; |
b0d55476 | 2904 | tree t = NULL; |
85942f45 | 2905 | tree target = NULL; |
310bc633 | 2906 | |
231b4916 JH |
2907 | *speculative = false; |
2908 | ||
b0d55476 | 2909 | if (param_index == -1) |
310bc633 MJ |
2910 | return NULL_TREE; |
2911 | ||
2912 | if (!ie->indirect_info->polymorphic) | |
2913 | { | |
b0d55476 | 2914 | tree t = NULL; |
8810cc52 MJ |
2915 | |
2916 | if (ie->indirect_info->agg_contents) | |
2917 | { | |
91bb9f80 MJ |
2918 | t = NULL; |
2919 | if (agg_reps && ie->indirect_info->guaranteed_unmodified) | |
162712de | 2920 | { |
162712de MJ |
2921 | while (agg_reps) |
2922 | { | |
2923 | if (agg_reps->index == param_index | |
7b920a9a MJ |
2924 | && agg_reps->offset == ie->indirect_info->offset |
2925 | && agg_reps->by_ref == ie->indirect_info->by_ref) | |
162712de MJ |
2926 | { |
2927 | t = agg_reps->value; | |
2928 | break; | |
2929 | } | |
2930 | agg_reps = agg_reps->next; | |
2931 | } | |
2932 | } | |
91bb9f80 | 2933 | if (!t) |
8810cc52 | 2934 | { |
eb270950 | 2935 | struct ipa_agg_value_set *agg; |
91bb9f80 | 2936 | if (known_aggs.length () > (unsigned int) param_index) |
eb270950 | 2937 | agg = &known_aggs[param_index]; |
91bb9f80 MJ |
2938 | else |
2939 | agg = NULL; | |
2940 | bool from_global_constant; | |
b0d55476 JH |
2941 | t = ipa_find_agg_cst_for_param (agg, |
2942 | (unsigned) param_index | |
2943 | < known_csts.length () | |
2944 | ? known_csts[param_index] | |
2945 | : NULL, | |
91bb9f80 MJ |
2946 | ie->indirect_info->offset, |
2947 | ie->indirect_info->by_ref, | |
2948 | &from_global_constant); | |
44a71f36 MJ |
2949 | if (t |
2950 | && !from_global_constant | |
91bb9f80 MJ |
2951 | && !ie->indirect_info->guaranteed_unmodified) |
2952 | t = NULL_TREE; | |
8810cc52 | 2953 | } |
8810cc52 | 2954 | } |
b0d55476 | 2955 | else if ((unsigned) param_index < known_csts.length ()) |
44210a96 | 2956 | t = known_csts[param_index]; |
8810cc52 | 2957 | |
155c9907 JJ |
2958 | if (t |
2959 | && TREE_CODE (t) == ADDR_EXPR | |
310bc633 | 2960 | && TREE_CODE (TREE_OPERAND (t, 0)) == FUNCTION_DECL) |
81fa35bd | 2961 | return TREE_OPERAND (t, 0); |
310bc633 MJ |
2962 | else |
2963 | return NULL_TREE; | |
2964 | } | |
2965 | ||
2bf86c84 | 2966 | if (!opt_for_fn (ie->caller->decl, flag_devirtualize)) |
85942f45 JH |
2967 | return NULL_TREE; |
2968 | ||
8810cc52 | 2969 | gcc_assert (!ie->indirect_info->agg_contents); |
8b7773a4 | 2970 | anc_offset = ie->indirect_info->offset; |
310bc633 | 2971 | |
85942f45 JH |
2972 | t = NULL; |
2973 | ||
f25ae20e | 2974 | /* Try to work out value of virtual table pointer value in replacements. */ |
231b4916 | 2975 | if (!t && agg_reps && !ie->indirect_info->by_ref) |
85942f45 JH |
2976 | { |
2977 | while (agg_reps) | |
2978 | { | |
2979 | if (agg_reps->index == param_index | |
2980 | && agg_reps->offset == ie->indirect_info->offset | |
2981 | && agg_reps->by_ref) | |
2982 | { | |
2983 | t = agg_reps->value; | |
2984 | break; | |
2985 | } | |
2986 | agg_reps = agg_reps->next; | |
2987 | } | |
2988 | } | |
2989 | ||
2990 | /* Try to work out value of virtual table pointer value in known | |
2991 | aggregate values. */ | |
2992 | if (!t && known_aggs.length () > (unsigned int) param_index | |
231b4916 | 2993 | && !ie->indirect_info->by_ref) |
85942f45 | 2994 | { |
eb270950 | 2995 | struct ipa_agg_value_set *agg = &known_aggs[param_index]; |
b0d55476 JH |
2996 | t = ipa_find_agg_cst_for_param (agg, |
2997 | (unsigned) param_index | |
2998 | < known_csts.length () | |
2999 | ? known_csts[param_index] : NULL, | |
155c9907 | 3000 | ie->indirect_info->offset, true); |
85942f45 JH |
3001 | } |
3002 | ||
9de2f554 | 3003 | /* If we found the virtual table pointer, lookup the target. */ |
85942f45 | 3004 | if (t) |
9de2f554 JH |
3005 | { |
3006 | tree vtable; | |
3007 | unsigned HOST_WIDE_INT offset; | |
3008 | if (vtable_pointer_value_to_vtable (t, &vtable, &offset)) | |
3009 | { | |
2994ab20 | 3010 | bool can_refer; |
9de2f554 | 3011 | target = gimple_get_virt_method_for_vtable (ie->indirect_info->otr_token, |
2994ab20 JH |
3012 | vtable, offset, &can_refer); |
3013 | if (can_refer) | |
9de2f554 | 3014 | { |
2994ab20 | 3015 | if (!target |
cb1180d5 | 3016 | || fndecl_built_in_p (target, BUILT_IN_UNREACHABLE) |
8472fa80 | 3017 | || !possible_polymorphic_call_target_p |
d52f5295 | 3018 | (ie, cgraph_node::get (target))) |
2994ab20 JH |
3019 | { |
3020 | /* Do not speculate builtin_unreachable, it is stupid! */ | |
3021 | if (ie->indirect_info->vptr_changed) | |
3022 | return NULL; | |
3023 | target = ipa_impossible_devirt_target (ie, target); | |
3024 | } | |
155c9907 | 3025 | *speculative = ie->indirect_info->vptr_changed; |
231b4916 | 3026 | if (!*speculative) |
155c9907 | 3027 | return target; |
9de2f554 | 3028 | } |
9de2f554 JH |
3029 | } |
3030 | } | |
85942f45 | 3031 | |
44210a96 | 3032 | /* Do we know the constant value of pointer? */ |
b0d55476 | 3033 | if (!t && (unsigned) param_index < known_csts.length ()) |
44210a96 | 3034 | t = known_csts[param_index]; |
310bc633 | 3035 | |
44210a96 MJ |
3036 | gcc_checking_assert (!t || TREE_CODE (t) != TREE_BINFO); |
3037 | ||
3038 | ipa_polymorphic_call_context context; | |
3039 | if (known_contexts.length () > (unsigned int) param_index) | |
310bc633 | 3040 | { |
44210a96 | 3041 | context = known_contexts[param_index]; |
df0d8136 JH |
3042 | context.offset_by (anc_offset); |
3043 | if (ie->indirect_info->vptr_changed) | |
3044 | context.possible_dynamic_type_change (ie->in_polymorphic_cdtor, | |
3045 | ie->indirect_info->otr_type); | |
44210a96 MJ |
3046 | if (t) |
3047 | { | |
3048 | ipa_polymorphic_call_context ctx2 = ipa_polymorphic_call_context | |
3049 | (t, ie->indirect_info->otr_type, anc_offset); | |
3050 | if (!ctx2.useless_p ()) | |
3051 | context.combine_with (ctx2, ie->indirect_info->otr_type); | |
3052 | } | |
310bc633 | 3053 | } |
44210a96 | 3054 | else if (t) |
33c3b6be JH |
3055 | { |
3056 | context = ipa_polymorphic_call_context (t, ie->indirect_info->otr_type, | |
3057 | anc_offset); | |
3058 | if (ie->indirect_info->vptr_changed) | |
3059 | context.possible_dynamic_type_change (ie->in_polymorphic_cdtor, | |
3060 | ie->indirect_info->otr_type); | |
3061 | } | |
310bc633 | 3062 | else |
44210a96 | 3063 | return NULL_TREE; |
310bc633 | 3064 | |
44210a96 MJ |
3065 | vec <cgraph_node *>targets; |
3066 | bool final; | |
3067 | ||
3068 | targets = possible_polymorphic_call_targets | |
3069 | (ie->indirect_info->otr_type, | |
3070 | ie->indirect_info->otr_token, | |
3071 | context, &final); | |
3072 | if (!final || targets.length () > 1) | |
231b4916 JH |
3073 | { |
3074 | struct cgraph_node *node; | |
3075 | if (*speculative) | |
3076 | return target; | |
2bf86c84 JH |
3077 | if (!opt_for_fn (ie->caller->decl, flag_devirtualize_speculatively) |
3078 | || ie->speculative || !ie->maybe_hot_p ()) | |
231b4916 JH |
3079 | return NULL; |
3080 | node = try_speculative_devirtualization (ie->indirect_info->otr_type, | |
3081 | ie->indirect_info->otr_token, | |
3082 | context); | |
3083 | if (node) | |
3084 | { | |
3085 | *speculative = true; | |
3086 | target = node->decl; | |
3087 | } | |
3088 | else | |
3089 | return NULL; | |
3090 | } | |
44210a96 | 3091 | else |
231b4916 JH |
3092 | { |
3093 | *speculative = false; | |
3094 | if (targets.length () == 1) | |
3095 | target = targets[0]->decl; | |
3096 | else | |
3097 | target = ipa_impossible_devirt_target (ie, NULL_TREE); | |
3098 | } | |
b5165eb0 MJ |
3099 | |
3100 | if (target && !possible_polymorphic_call_target_p (ie, | |
d52f5295 | 3101 | cgraph_node::get (target))) |
2994ab20 JH |
3102 | { |
3103 | if (*speculative) | |
3104 | return NULL; | |
3105 | target = ipa_impossible_devirt_target (ie, target); | |
3106 | } | |
450ad0cd JH |
3107 | |
3108 | return target; | |
310bc633 MJ |
3109 | } |
3110 | ||
162712de | 3111 | |
44210a96 MJ |
3112 | /* If an indirect edge IE can be turned into a direct one based on KNOWN_CSTS, |
3113 | KNOWN_CONTEXTS (which can be vNULL) or KNOWN_AGGS (which also can be vNULL) | |
3114 | return the destination. */ | |
162712de MJ |
3115 | |
3116 | tree | |
3117 | ipa_get_indirect_edge_target (struct cgraph_edge *ie, | |
44210a96 MJ |
3118 | vec<tree> known_csts, |
3119 | vec<ipa_polymorphic_call_context> known_contexts, | |
eb270950 | 3120 | vec<ipa_agg_value_set> known_aggs, |
231b4916 | 3121 | bool *speculative) |
162712de | 3122 | { |
44210a96 | 3123 | return ipa_get_indirect_edge_target_1 (ie, known_csts, known_contexts, |
231b4916 | 3124 | known_aggs, NULL, speculative); |
162712de MJ |
3125 | } |
3126 | ||
310bc633 | 3127 | /* Calculate devirtualization time bonus for NODE, assuming we know KNOWN_CSTS |
44210a96 | 3128 | and KNOWN_CONTEXTS. */ |
310bc633 MJ |
3129 | |
3130 | static int | |
3131 | devirtualization_time_bonus (struct cgraph_node *node, | |
9771b263 | 3132 | vec<tree> known_csts, |
44210a96 | 3133 | vec<ipa_polymorphic_call_context> known_contexts, |
eb270950 | 3134 | vec<ipa_agg_value_set> known_aggs) |
310bc633 MJ |
3135 | { |
3136 | struct cgraph_edge *ie; | |
3137 | int res = 0; | |
3138 | ||
3139 | for (ie = node->indirect_calls; ie; ie = ie->next_callee) | |
3140 | { | |
3141 | struct cgraph_node *callee; | |
99b1c316 | 3142 | class ipa_fn_summary *isummary; |
8ad274d2 | 3143 | enum availability avail; |
81fa35bd | 3144 | tree target; |
231b4916 | 3145 | bool speculative; |
310bc633 | 3146 | |
44210a96 | 3147 | target = ipa_get_indirect_edge_target (ie, known_csts, known_contexts, |
231b4916 | 3148 | known_aggs, &speculative); |
310bc633 MJ |
3149 | if (!target) |
3150 | continue; | |
3151 | ||
3152 | /* Only bare minimum benefit for clearly un-inlineable targets. */ | |
3153 | res += 1; | |
d52f5295 | 3154 | callee = cgraph_node::get (target); |
67348ccc | 3155 | if (!callee || !callee->definition) |
310bc633 | 3156 | continue; |
d52f5295 | 3157 | callee = callee->function_symbol (&avail); |
8ad274d2 JH |
3158 | if (avail < AVAIL_AVAILABLE) |
3159 | continue; | |
56f62793 | 3160 | isummary = ipa_fn_summaries->get (callee); |
310bc633 MJ |
3161 | if (!isummary->inlinable) |
3162 | continue; | |
3163 | ||
f658ad30 | 3164 | int size = ipa_size_summaries->get (callee)->size; |
310bc633 MJ |
3165 | /* FIXME: The values below need re-considering and perhaps also |
3166 | integrating into the cost metrics, at lest in some very basic way. */ | |
78a502ca ML |
3167 | int max_inline_insns_auto |
3168 | = opt_for_fn (callee->decl, param_max_inline_insns_auto); | |
3169 | if (size <= max_inline_insns_auto / 4) | |
231b4916 | 3170 | res += 31 / ((int)speculative + 1); |
78a502ca | 3171 | else if (size <= max_inline_insns_auto / 2) |
231b4916 | 3172 | res += 15 / ((int)speculative + 1); |
78a502ca | 3173 | else if (size <= max_inline_insns_auto |
67348ccc | 3174 | || DECL_DECLARED_INLINE_P (callee->decl)) |
231b4916 | 3175 | res += 7 / ((int)speculative + 1); |
310bc633 MJ |
3176 | } |
3177 | ||
3178 | return res; | |
3179 | } | |
3180 | ||
2c9561b5 MJ |
3181 | /* Return time bonus incurred because of HINTS. */ |
3182 | ||
3183 | static int | |
fdfd7f53 | 3184 | hint_time_bonus (cgraph_node *node, ipa_hints hints) |
2c9561b5 | 3185 | { |
19321415 | 3186 | int result = 0; |
2c9561b5 | 3187 | if (hints & (INLINE_HINT_loop_iterations | INLINE_HINT_loop_stride)) |
fdfd7f53 | 3188 | result += opt_for_fn (node->decl, param_ipa_cp_loop_hint_bonus); |
19321415 | 3189 | return result; |
2c9561b5 MJ |
3190 | } |
3191 | ||
af21714c MJ |
3192 | /* If there is a reason to penalize the function described by INFO in the |
3193 | cloning goodness evaluation, do so. */ | |
3194 | ||
3195 | static inline int64_t | |
fdfd7f53 ML |
3196 | incorporate_penalties (cgraph_node *node, ipa_node_params *info, |
3197 | int64_t evaluation) | |
af21714c | 3198 | { |
9b14fc33 | 3199 | if (info->node_within_scc && !info->node_is_self_scc) |
af21714c | 3200 | evaluation = (evaluation |
fdfd7f53 ML |
3201 | * (100 - opt_for_fn (node->decl, |
3202 | param_ipa_cp_recursion_penalty))) / 100; | |
af21714c MJ |
3203 | |
3204 | if (info->node_calling_single_call) | |
3205 | evaluation = (evaluation | |
fdfd7f53 ML |
3206 | * (100 - opt_for_fn (node->decl, |
3207 | param_ipa_cp_single_call_penalty))) | |
af21714c MJ |
3208 | / 100; |
3209 | ||
3210 | return evaluation; | |
3211 | } | |
3212 | ||
310bc633 MJ |
3213 | /* Return true if cloning NODE is a good idea, given the estimated TIME_BENEFIT |
3214 | and SIZE_COST and with the sum of frequencies of incoming edges to the | |
3215 | potential new clone in FREQUENCIES. */ | |
3216 | ||
3217 | static bool | |
3218 | good_cloning_opportunity_p (struct cgraph_node *node, int time_benefit, | |
3995f3a2 | 3219 | int freq_sum, profile_count count_sum, int size_cost) |
310bc633 MJ |
3220 | { |
3221 | if (time_benefit == 0 | |
2bf86c84 | 3222 | || !opt_for_fn (node->decl, flag_ipa_cp_clone) |
5af56ae8 | 3223 | || node->optimize_for_size_p ()) |
310bc633 MJ |
3224 | return false; |
3225 | ||
df0227c4 | 3226 | gcc_assert (size_cost > 0); |
310bc633 | 3227 | |
99b1c316 | 3228 | class ipa_node_params *info = IPA_NODE_REF (node); |
fdfd7f53 | 3229 | int eval_threshold = opt_for_fn (node->decl, param_ipa_cp_eval_threshold); |
3995f3a2 | 3230 | if (max_count > profile_count::zero ()) |
310bc633 | 3231 | { |
357067f2 JH |
3232 | int factor = RDIV (count_sum.probability_in |
3233 | (max_count).to_reg_br_prob_base () | |
3995f3a2 | 3234 | * 1000, REG_BR_PROB_BASE); |
a9243bfc | 3235 | int64_t evaluation = (((int64_t) time_benefit * factor) |
df0227c4 | 3236 | / size_cost); |
fdfd7f53 | 3237 | evaluation = incorporate_penalties (node, info, evaluation); |
310bc633 MJ |
3238 | |
3239 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3995f3a2 JH |
3240 | { |
3241 | fprintf (dump_file, " good_cloning_opportunity_p (time: %i, " | |
3242 | "size: %i, count_sum: ", time_benefit, size_cost); | |
3243 | count_sum.dump (dump_file); | |
3244 | fprintf (dump_file, "%s%s) -> evaluation: " "%" PRId64 | |
df0227c4 | 3245 | ", threshold: %i\n", |
9b14fc33 FX |
3246 | info->node_within_scc |
3247 | ? (info->node_is_self_scc ? ", self_scc" : ", scc") : "", | |
af21714c | 3248 | info->node_calling_single_call ? ", single_call" : "", |
fdfd7f53 | 3249 | evaluation, eval_threshold); |
3995f3a2 | 3250 | } |
310bc633 | 3251 | |
fdfd7f53 | 3252 | return evaluation >= eval_threshold; |
310bc633 MJ |
3253 | } |
3254 | else | |
3255 | { | |
a9243bfc | 3256 | int64_t evaluation = (((int64_t) time_benefit * freq_sum) |
df0227c4 | 3257 | / size_cost); |
fdfd7f53 | 3258 | evaluation = incorporate_penalties (node, info, evaluation); |
310bc633 MJ |
3259 | |
3260 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3261 | fprintf (dump_file, " good_cloning_opportunity_p (time: %i, " | |
af21714c | 3262 | "size: %i, freq_sum: %i%s%s) -> evaluation: " |
16998094 | 3263 | "%" PRId64 ", threshold: %i\n", |
af21714c | 3264 | time_benefit, size_cost, freq_sum, |
9b14fc33 FX |
3265 | info->node_within_scc |
3266 | ? (info->node_is_self_scc ? ", self_scc" : ", scc") : "", | |
af21714c | 3267 | info->node_calling_single_call ? ", single_call" : "", |
fdfd7f53 | 3268 | evaluation, eval_threshold); |
310bc633 | 3269 | |
fdfd7f53 | 3270 | return evaluation >= eval_threshold; |
310bc633 MJ |
3271 | } |
3272 | } | |
3273 | ||
2c9561b5 MJ |
3274 | /* Return all context independent values from aggregate lattices in PLATS in a |
3275 | vector. Return NULL if there are none. */ | |
3276 | ||
eb270950 | 3277 | static vec<ipa_agg_value> |
99b1c316 | 3278 | context_independent_aggregate_values (class ipcp_param_lattices *plats) |
2c9561b5 | 3279 | { |
eb270950 | 3280 | vec<ipa_agg_value> res = vNULL; |
2c9561b5 MJ |
3281 | |
3282 | if (plats->aggs_bottom | |
3283 | || plats->aggs_contain_variable | |
3284 | || plats->aggs_count == 0) | |
eb270950 | 3285 | return vNULL; |
2c9561b5 MJ |
3286 | |
3287 | for (struct ipcp_agg_lattice *aglat = plats->aggs; | |
3288 | aglat; | |
3289 | aglat = aglat->next) | |
c0cb5055 | 3290 | if (aglat->is_single_const ()) |
2c9561b5 | 3291 | { |
eb270950 | 3292 | struct ipa_agg_value item; |
2c9561b5 MJ |
3293 | item.offset = aglat->offset; |
3294 | item.value = aglat->values->value; | |
eb270950 | 3295 | res.safe_push (item); |
2c9561b5 MJ |
3296 | } |
3297 | return res; | |
3298 | } | |
310bc633 | 3299 | |
44210a96 MJ |
3300 | /* Allocate KNOWN_CSTS, KNOWN_CONTEXTS and, if non-NULL, KNOWN_AGGS and |
3301 | populate them with values of parameters that are known independent of the | |
3302 | context. INFO describes the function. If REMOVABLE_PARAMS_COST is | |
3303 | non-NULL, the movement cost of all removable parameters will be stored in | |
3304 | it. */ | |
310bc633 MJ |
3305 | |
3306 | static bool | |
99b1c316 | 3307 | gather_context_independent_values (class ipa_node_params *info, |
44210a96 MJ |
3308 | vec<tree> *known_csts, |
3309 | vec<ipa_polymorphic_call_context> | |
3310 | *known_contexts, | |
eb270950 | 3311 | vec<ipa_agg_value_set> *known_aggs, |
44210a96 | 3312 | int *removable_params_cost) |
310bc633 MJ |
3313 | { |
3314 | int i, count = ipa_get_param_count (info); | |
3315 | bool ret = false; | |
3316 | ||
9771b263 | 3317 | known_csts->create (0); |
44210a96 | 3318 | known_contexts->create (0); |
9771b263 | 3319 | known_csts->safe_grow_cleared (count); |
44210a96 | 3320 | known_contexts->safe_grow_cleared (count); |
2c9561b5 MJ |
3321 | if (known_aggs) |
3322 | { | |
9771b263 DN |
3323 | known_aggs->create (0); |
3324 | known_aggs->safe_grow_cleared (count); | |
2c9561b5 | 3325 | } |
310bc633 MJ |
3326 | |
3327 | if (removable_params_cost) | |
3328 | *removable_params_cost = 0; | |
3329 | ||
155c9907 | 3330 | for (i = 0; i < count; i++) |
310bc633 | 3331 | { |
99b1c316 | 3332 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 | 3333 | ipcp_lattice<tree> *lat = &plats->itself; |
310bc633 | 3334 | |
c0cb5055 | 3335 | if (lat->is_single_const ()) |
310bc633 | 3336 | { |
c0cb5055 | 3337 | ipcp_value<tree> *val = lat->values; |
44210a96 MJ |
3338 | gcc_checking_assert (TREE_CODE (val->value) != TREE_BINFO); |
3339 | (*known_csts)[i] = val->value; | |
3340 | if (removable_params_cost) | |
3341 | *removable_params_cost | |
3342 | += estimate_move_cost (TREE_TYPE (val->value), false); | |
3343 | ret = true; | |
310bc633 MJ |
3344 | } |
3345 | else if (removable_params_cost | |
3346 | && !ipa_is_param_used (info, i)) | |
3347 | *removable_params_cost | |
0e8853ee | 3348 | += ipa_get_param_move_cost (info, i); |
2c9561b5 | 3349 | |
5af56ae8 JH |
3350 | if (!ipa_is_param_used (info, i)) |
3351 | continue; | |
3352 | ||
44210a96 | 3353 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; |
5af56ae8 JH |
3354 | /* Do not account known context as reason for cloning. We can see |
3355 | if it permits devirtualization. */ | |
44210a96 | 3356 | if (ctxlat->is_single_const ()) |
5af56ae8 | 3357 | (*known_contexts)[i] = ctxlat->values->value; |
44210a96 | 3358 | |
2c9561b5 MJ |
3359 | if (known_aggs) |
3360 | { | |
eb270950 FX |
3361 | vec<ipa_agg_value> agg_items; |
3362 | struct ipa_agg_value_set *agg; | |
2c9561b5 MJ |
3363 | |
3364 | agg_items = context_independent_aggregate_values (plats); | |
eb270950 FX |
3365 | agg = &(*known_aggs)[i]; |
3366 | agg->items = agg_items; | |
3367 | agg->by_ref = plats->aggs_by_ref; | |
3368 | ret |= !agg_items.is_empty (); | |
2c9561b5 | 3369 | } |
310bc633 MJ |
3370 | } |
3371 | ||
3372 | return ret; | |
3373 | } | |
3374 | ||
c0cb5055 | 3375 | /* Perform time and size measurement of NODE with the context given in |
44210a96 | 3376 | KNOWN_CSTS, KNOWN_CONTEXTS and KNOWN_AGGS, calculate the benefit and cost |
c0cb5055 MJ |
3377 | given BASE_TIME of the node without specialization, REMOVABLE_PARAMS_COST of |
3378 | all context-independent removable parameters and EST_MOVE_COST of estimated | |
3379 | movement of the considered parameter and store it into VAL. */ | |
3380 | ||
3381 | static void | |
3382 | perform_estimation_of_a_value (cgraph_node *node, vec<tree> known_csts, | |
44210a96 | 3383 | vec<ipa_polymorphic_call_context> known_contexts, |
eb270950 | 3384 | vec<ipa_agg_value_set> known_aggs, |
26f1a658 | 3385 | int removable_params_cost, |
c0cb5055 MJ |
3386 | int est_move_cost, ipcp_value_base *val) |
3387 | { | |
ab38481c | 3388 | int size, time_benefit; |
26f1a658 | 3389 | sreal time, base_time; |
0bceb671 | 3390 | ipa_hints hints; |
c0cb5055 | 3391 | |
44210a96 | 3392 | estimate_ipcp_clone_size_and_time (node, known_csts, known_contexts, |
eb270950 | 3393 | known_aggs, &size, &time, |
26f1a658 | 3394 | &base_time, &hints); |
ab38481c JH |
3395 | base_time -= time; |
3396 | if (base_time > 65535) | |
3397 | base_time = 65535; | |
59d9a0aa MJ |
3398 | |
3399 | /* Extern inline functions have no cloning local time benefits because they | |
3400 | will be inlined anyway. The only reason to clone them is if it enables | |
3401 | optimization in any of the functions they call. */ | |
3402 | if (DECL_EXTERNAL (node->decl) && DECL_DECLARED_INLINE_P (node->decl)) | |
3403 | time_benefit = 0; | |
3404 | else | |
3405 | time_benefit = base_time.to_int () | |
3406 | + devirtualization_time_bonus (node, known_csts, known_contexts, | |
eb270950 | 3407 | known_aggs) |
fdfd7f53 | 3408 | + hint_time_bonus (node, hints) |
59d9a0aa | 3409 | + removable_params_cost + est_move_cost; |
c0cb5055 MJ |
3410 | |
3411 | gcc_checking_assert (size >=0); | |
3412 | /* The inliner-heuristics based estimates may think that in certain | |
3413 | contexts some functions do not have any size at all but we want | |
3414 | all specializations to have at least a tiny cost, not least not to | |
3415 | divide by zero. */ | |
3416 | if (size == 0) | |
3417 | size = 1; | |
3418 | ||
3419 | val->local_time_benefit = time_benefit; | |
3420 | val->local_size_cost = size; | |
3421 | } | |
3422 | ||
f7725a48 MJ |
3423 | /* Get the overall limit oof growth based on parameters extracted from growth. |
3424 | it does not really make sense to mix functions with different overall growth | |
3425 | limits but it is possible and if it happens, we do not want to select one | |
3426 | limit at random. */ | |
3427 | ||
3428 | static long | |
3429 | get_max_overall_size (cgraph_node *node) | |
3430 | { | |
3431 | long max_new_size = orig_overall_size; | |
3432 | long large_unit = opt_for_fn (node->decl, param_large_unit_insns); | |
3433 | if (max_new_size < large_unit) | |
3434 | max_new_size = large_unit; | |
3435 | int unit_growth = opt_for_fn (node->decl, param_ipcp_unit_growth); | |
3436 | max_new_size += max_new_size * unit_growth / 100 + 1; | |
3437 | return max_new_size; | |
3438 | } | |
3439 | ||
310bc633 MJ |
3440 | /* Iterate over known values of parameters of NODE and estimate the local |
3441 | effects in terms of time and size they have. */ | |
3442 | ||
3443 | static void | |
3444 | estimate_local_effects (struct cgraph_node *node) | |
3445 | { | |
99b1c316 | 3446 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 | 3447 | int i, count = ipa_get_param_count (info); |
44210a96 MJ |
3448 | vec<tree> known_csts; |
3449 | vec<ipa_polymorphic_call_context> known_contexts; | |
eb270950 | 3450 | vec<ipa_agg_value_set> known_aggs; |
310bc633 | 3451 | bool always_const; |
310bc633 MJ |
3452 | int removable_params_cost; |
3453 | ||
3454 | if (!count || !ipcp_versionable_function_p (node)) | |
3455 | return; | |
3456 | ||
ca30a539 | 3457 | if (dump_file && (dump_flags & TDF_DETAILS)) |
464d0118 | 3458 | fprintf (dump_file, "\nEstimating effects for %s.\n", node->dump_name ()); |
310bc633 MJ |
3459 | |
3460 | always_const = gather_context_independent_values (info, &known_csts, | |
44210a96 | 3461 | &known_contexts, &known_aggs, |
310bc633 | 3462 | &removable_params_cost); |
5af56ae8 | 3463 | int devirt_bonus = devirtualization_time_bonus (node, known_csts, |
eb270950 | 3464 | known_contexts, known_aggs); |
dcf89d57 | 3465 | if (always_const || devirt_bonus |
87f94429 | 3466 | || (removable_params_cost && node->can_change_signature)) |
ca30a539 | 3467 | { |
310bc633 | 3468 | struct caller_statistics stats; |
0bceb671 | 3469 | ipa_hints hints; |
26f1a658 | 3470 | sreal time, base_time; |
ab38481c | 3471 | int size; |
310bc633 MJ |
3472 | |
3473 | init_caller_stats (&stats); | |
d52f5295 ML |
3474 | node->call_for_symbol_thunks_and_aliases (gather_caller_stats, &stats, |
3475 | false); | |
44210a96 | 3476 | estimate_ipcp_clone_size_and_time (node, known_csts, known_contexts, |
eb270950 | 3477 | known_aggs, &size, &time, |
26f1a658 | 3478 | &base_time, &hints); |
5af56ae8 | 3479 | time -= devirt_bonus; |
fdfd7f53 | 3480 | time -= hint_time_bonus (node, hints); |
310bc633 MJ |
3481 | time -= removable_params_cost; |
3482 | size -= stats.n_calls * removable_params_cost; | |
3483 | ||
3484 | if (dump_file) | |
3485 | fprintf (dump_file, " - context independent values, size: %i, " | |
ab38481c | 3486 | "time_benefit: %f\n", size, (base_time - time).to_double ()); |
310bc633 | 3487 | |
87f94429 | 3488 | if (size <= 0 || node->local) |
310bc633 | 3489 | { |
eb20b778 | 3490 | info->do_clone_for_all_contexts = true; |
310bc633 MJ |
3491 | |
3492 | if (dump_file) | |
3493 | fprintf (dump_file, " Decided to specialize for all " | |
3494 | "known contexts, code not going to grow.\n"); | |
3495 | } | |
26f1a658 | 3496 | else if (good_cloning_opportunity_p (node, |
5036f628 | 3497 | MIN ((base_time - time).to_int (), |
26f1a658 | 3498 | 65536), |
310bc633 MJ |
3499 | stats.freq_sum, stats.count_sum, |
3500 | size)) | |
3501 | { | |
f7725a48 | 3502 | if (size + overall_size <= get_max_overall_size (node)) |
310bc633 | 3503 | { |
eb20b778 | 3504 | info->do_clone_for_all_contexts = true; |
310bc633 MJ |
3505 | overall_size += size; |
3506 | ||
3507 | if (dump_file) | |
3508 | fprintf (dump_file, " Decided to specialize for all " | |
3509 | "known contexts, growth deemed beneficial.\n"); | |
3510 | } | |
3511 | else if (dump_file && (dump_flags & TDF_DETAILS)) | |
f7725a48 MJ |
3512 | fprintf (dump_file, " Not cloning for all contexts because " |
3513 | "maximum unit size would be reached with %li.\n", | |
310bc633 MJ |
3514 | size + overall_size); |
3515 | } | |
5af56ae8 JH |
3516 | else if (dump_file && (dump_flags & TDF_DETAILS)) |
3517 | fprintf (dump_file, " Not cloning for all contexts because " | |
3518 | "!good_cloning_opportunity_p.\n"); | |
155c9907 | 3519 | |
ca30a539 JH |
3520 | } |
3521 | ||
155c9907 | 3522 | for (i = 0; i < count; i++) |
ca30a539 | 3523 | { |
99b1c316 | 3524 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 MJ |
3525 | ipcp_lattice<tree> *lat = &plats->itself; |
3526 | ipcp_value<tree> *val; | |
310bc633 MJ |
3527 | |
3528 | if (lat->bottom | |
3529 | || !lat->values | |
44210a96 | 3530 | || known_csts[i]) |
310bc633 MJ |
3531 | continue; |
3532 | ||
3533 | for (val = lat->values; val; val = val->next) | |
3534 | { | |
44210a96 MJ |
3535 | gcc_checking_assert (TREE_CODE (val->value) != TREE_BINFO); |
3536 | known_csts[i] = val->value; | |
310bc633 | 3537 | |
44210a96 MJ |
3538 | int emc = estimate_move_cost (TREE_TYPE (val->value), true); |
3539 | perform_estimation_of_a_value (node, known_csts, known_contexts, | |
eb270950 | 3540 | known_aggs, |
c0cb5055 | 3541 | removable_params_cost, emc, val); |
0318fc77 | 3542 | |
310bc633 MJ |
3543 | if (dump_file && (dump_flags & TDF_DETAILS)) |
3544 | { | |
3545 | fprintf (dump_file, " - estimates for value "); | |
3546 | print_ipcp_constant_value (dump_file, val->value); | |
0e8853ee JH |
3547 | fprintf (dump_file, " for "); |
3548 | ipa_dump_param (dump_file, info, i); | |
310bc633 | 3549 | fprintf (dump_file, ": time_benefit: %i, size: %i\n", |
c0cb5055 | 3550 | val->local_time_benefit, val->local_size_cost); |
310bc633 | 3551 | } |
310bc633 | 3552 | } |
9771b263 | 3553 | known_csts[i] = NULL_TREE; |
2c9561b5 MJ |
3554 | } |
3555 | ||
44210a96 MJ |
3556 | for (i = 0; i < count; i++) |
3557 | { | |
99b1c316 | 3558 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
44210a96 MJ |
3559 | |
3560 | if (!plats->virt_call) | |
3561 | continue; | |
3562 | ||
3563 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; | |
3564 | ipcp_value<ipa_polymorphic_call_context> *val; | |
3565 | ||
3566 | if (ctxlat->bottom | |
3567 | || !ctxlat->values | |
3568 | || !known_contexts[i].useless_p ()) | |
3569 | continue; | |
3570 | ||
3571 | for (val = ctxlat->values; val; val = val->next) | |
3572 | { | |
3573 | known_contexts[i] = val->value; | |
3574 | perform_estimation_of_a_value (node, known_csts, known_contexts, | |
eb270950 | 3575 | known_aggs, |
44210a96 MJ |
3576 | removable_params_cost, 0, val); |
3577 | ||
3578 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3579 | { | |
3580 | fprintf (dump_file, " - estimates for polymorphic context "); | |
3581 | print_ipcp_constant_value (dump_file, val->value); | |
3582 | fprintf (dump_file, " for "); | |
3583 | ipa_dump_param (dump_file, info, i); | |
3584 | fprintf (dump_file, ": time_benefit: %i, size: %i\n", | |
3585 | val->local_time_benefit, val->local_size_cost); | |
3586 | } | |
3587 | } | |
3588 | known_contexts[i] = ipa_polymorphic_call_context (); | |
3589 | } | |
3590 | ||
155c9907 | 3591 | for (i = 0; i < count; i++) |
2c9561b5 | 3592 | { |
99b1c316 | 3593 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
eb270950 | 3594 | struct ipa_agg_value_set *agg; |
2c9561b5 MJ |
3595 | struct ipcp_agg_lattice *aglat; |
3596 | ||
3597 | if (plats->aggs_bottom || !plats->aggs) | |
3598 | continue; | |
3599 | ||
eb270950 | 3600 | agg = &known_aggs[i]; |
2c9561b5 MJ |
3601 | for (aglat = plats->aggs; aglat; aglat = aglat->next) |
3602 | { | |
c0cb5055 | 3603 | ipcp_value<tree> *val; |
2c9561b5 MJ |
3604 | if (aglat->bottom || !aglat->values |
3605 | /* If the following is true, the one value is in known_aggs. */ | |
3606 | || (!plats->aggs_contain_variable | |
c0cb5055 | 3607 | && aglat->is_single_const ())) |
2c9561b5 MJ |
3608 | continue; |
3609 | ||
3610 | for (val = aglat->values; val; val = val->next) | |
3611 | { | |
eb270950 | 3612 | struct ipa_agg_value item; |
2c9561b5 MJ |
3613 | |
3614 | item.offset = aglat->offset; | |
3615 | item.value = val->value; | |
eb270950 | 3616 | agg->items.safe_push (item); |
2c9561b5 | 3617 | |
44210a96 | 3618 | perform_estimation_of_a_value (node, known_csts, known_contexts, |
eb270950 | 3619 | known_aggs, |
c0cb5055 | 3620 | removable_params_cost, 0, val); |
2c9561b5 MJ |
3621 | |
3622 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3623 | { | |
3624 | fprintf (dump_file, " - estimates for value "); | |
3625 | print_ipcp_constant_value (dump_file, val->value); | |
0e8853ee | 3626 | fprintf (dump_file, " for "); |
155c9907 | 3627 | ipa_dump_param (dump_file, info, i); |
2c9561b5 | 3628 | fprintf (dump_file, "[%soffset: " HOST_WIDE_INT_PRINT_DEC |
c0cb5055 MJ |
3629 | "]: time_benefit: %i, size: %i\n", |
3630 | plats->aggs_by_ref ? "ref " : "", | |
3631 | aglat->offset, | |
3632 | val->local_time_benefit, val->local_size_cost); | |
2c9561b5 MJ |
3633 | } |
3634 | ||
eb270950 | 3635 | agg->items.pop (); |
2c9561b5 MJ |
3636 | } |
3637 | } | |
3638 | } | |
3639 | ||
9771b263 | 3640 | known_csts.release (); |
44210a96 | 3641 | known_contexts.release (); |
eb270950 | 3642 | ipa_release_agg_values (known_aggs); |
310bc633 MJ |
3643 | } |
3644 | ||
3645 | ||
3646 | /* Add value CUR_VAL and all yet-unsorted values it is dependent on to the | |
3647 | topological sort of values. */ | |
3648 | ||
c0cb5055 MJ |
3649 | template <typename valtype> |
3650 | void | |
3651 | value_topo_info<valtype>::add_val (ipcp_value<valtype> *cur_val) | |
310bc633 | 3652 | { |
c0cb5055 | 3653 | ipcp_value_source<valtype> *src; |
310bc633 MJ |
3654 | |
3655 | if (cur_val->dfs) | |
3656 | return; | |
3657 | ||
3658 | dfs_counter++; | |
3659 | cur_val->dfs = dfs_counter; | |
3660 | cur_val->low_link = dfs_counter; | |
3661 | ||
3662 | cur_val->topo_next = stack; | |
3663 | stack = cur_val; | |
3664 | cur_val->on_stack = true; | |
3665 | ||
3666 | for (src = cur_val->sources; src; src = src->next) | |
3667 | if (src->val) | |
3668 | { | |
3669 | if (src->val->dfs == 0) | |
3670 | { | |
c0cb5055 | 3671 | add_val (src->val); |
310bc633 MJ |
3672 | if (src->val->low_link < cur_val->low_link) |
3673 | cur_val->low_link = src->val->low_link; | |
3674 | } | |
3675 | else if (src->val->on_stack | |
3676 | && src->val->dfs < cur_val->low_link) | |
3677 | cur_val->low_link = src->val->dfs; | |
3678 | } | |
3679 | ||
3680 | if (cur_val->dfs == cur_val->low_link) | |
ca30a539 | 3681 | { |
c0cb5055 | 3682 | ipcp_value<valtype> *v, *scc_list = NULL; |
310bc633 MJ |
3683 | |
3684 | do | |
3685 | { | |
3686 | v = stack; | |
3687 | stack = v->topo_next; | |
3688 | v->on_stack = false; | |
3689 | ||
3690 | v->scc_next = scc_list; | |
3691 | scc_list = v; | |
3692 | } | |
3693 | while (v != cur_val); | |
3694 | ||
3695 | cur_val->topo_next = values_topo; | |
3696 | values_topo = cur_val; | |
ca30a539 | 3697 | } |
518dc859 RL |
3698 | } |
3699 | ||
310bc633 MJ |
3700 | /* Add all values in lattices associated with NODE to the topological sort if |
3701 | they are not there yet. */ | |
3702 | ||
3703 | static void | |
c0cb5055 | 3704 | add_all_node_vals_to_toposort (cgraph_node *node, ipa_topo_info *topo) |
518dc859 | 3705 | { |
99b1c316 | 3706 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 MJ |
3707 | int i, count = ipa_get_param_count (info); |
3708 | ||
155c9907 | 3709 | for (i = 0; i < count; i++) |
310bc633 | 3710 | { |
99b1c316 | 3711 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 | 3712 | ipcp_lattice<tree> *lat = &plats->itself; |
2c9561b5 | 3713 | struct ipcp_agg_lattice *aglat; |
310bc633 | 3714 | |
2c9561b5 | 3715 | if (!lat->bottom) |
44210a96 MJ |
3716 | { |
3717 | ipcp_value<tree> *val; | |
3718 | for (val = lat->values; val; val = val->next) | |
3719 | topo->constants.add_val (val); | |
3720 | } | |
2c9561b5 MJ |
3721 | |
3722 | if (!plats->aggs_bottom) | |
3723 | for (aglat = plats->aggs; aglat; aglat = aglat->next) | |
3724 | if (!aglat->bottom) | |
44210a96 MJ |
3725 | { |
3726 | ipcp_value<tree> *val; | |
3727 | for (val = aglat->values; val; val = val->next) | |
3728 | topo->constants.add_val (val); | |
3729 | } | |
3730 | ||
3731 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; | |
3732 | if (!ctxlat->bottom) | |
3733 | { | |
3734 | ipcp_value<ipa_polymorphic_call_context> *ctxval; | |
3735 | for (ctxval = ctxlat->values; ctxval; ctxval = ctxval->next) | |
3736 | topo->contexts.add_val (ctxval); | |
3737 | } | |
310bc633 | 3738 | } |
518dc859 RL |
3739 | } |
3740 | ||
310bc633 MJ |
3741 | /* One pass of constants propagation along the call graph edges, from callers |
3742 | to callees (requires topological ordering in TOPO), iterate over strongly | |
3743 | connected components. */ | |
3744 | ||
518dc859 | 3745 | static void |
99b1c316 | 3746 | propagate_constants_topo (class ipa_topo_info *topo) |
518dc859 | 3747 | { |
310bc633 | 3748 | int i; |
518dc859 | 3749 | |
310bc633 | 3750 | for (i = topo->nnodes - 1; i >= 0; i--) |
518dc859 | 3751 | { |
39e87baf | 3752 | unsigned j; |
310bc633 | 3753 | struct cgraph_node *v, *node = topo->order[i]; |
d52f5295 | 3754 | vec<cgraph_node *> cycle_nodes = ipa_get_nodes_in_cycle (node); |
310bc633 | 3755 | |
310bc633 MJ |
3756 | /* First, iteratively propagate within the strongly connected component |
3757 | until all lattices stabilize. */ | |
39e87baf | 3758 | FOR_EACH_VEC_ELT (cycle_nodes, j, v) |
d52f5295 | 3759 | if (v->has_gimple_body_p ()) |
6cf67b62 | 3760 | { |
e72763e2 JH |
3761 | if (opt_for_fn (v->decl, flag_ipa_cp) |
3762 | && opt_for_fn (v->decl, optimize)) | |
6cf67b62 | 3763 | push_node_to_stack (topo, v); |
223f4b10 | 3764 | /* When V is not optimized, we can not push it to stack, but |
6cf67b62 JH |
3765 | still we need to set all its callees lattices to bottom. */ |
3766 | else | |
3767 | { | |
3768 | for (cgraph_edge *cs = v->callees; cs; cs = cs->next_callee) | |
3769 | propagate_constants_across_call (cs); | |
3770 | } | |
3771 | } | |
310bc633 | 3772 | |
39e87baf | 3773 | v = pop_node_from_stack (topo); |
310bc633 MJ |
3774 | while (v) |
3775 | { | |
3776 | struct cgraph_edge *cs; | |
9b14fc33 FX |
3777 | class ipa_node_params *info = NULL; |
3778 | bool self_scc = true; | |
310bc633 MJ |
3779 | |
3780 | for (cs = v->callees; cs; cs = cs->next_callee) | |
af21714c MJ |
3781 | if (ipa_edge_within_scc (cs)) |
3782 | { | |
9b14fc33 FX |
3783 | cgraph_node *callee = cs->callee->function_symbol (); |
3784 | ||
3785 | if (v != callee) | |
3786 | self_scc = false; | |
3787 | ||
3788 | if (!info) | |
3789 | { | |
3790 | info = IPA_NODE_REF (v); | |
3791 | info->node_within_scc = true; | |
3792 | } | |
3793 | ||
155c9907 | 3794 | if (propagate_constants_across_call (cs)) |
9b14fc33 | 3795 | push_node_to_stack (topo, callee); |
af21714c | 3796 | } |
9b14fc33 FX |
3797 | |
3798 | if (info) | |
3799 | info->node_is_self_scc = self_scc; | |
3800 | ||
310bc633 MJ |
3801 | v = pop_node_from_stack (topo); |
3802 | } | |
3803 | ||
3804 | /* Afterwards, propagate along edges leading out of the SCC, calculates | |
3805 | the local effects of the discovered constants and all valid values to | |
3806 | their topological sort. */ | |
39e87baf | 3807 | FOR_EACH_VEC_ELT (cycle_nodes, j, v) |
6cf67b62 | 3808 | if (v->has_gimple_body_p () |
e72763e2 JH |
3809 | && opt_for_fn (v->decl, flag_ipa_cp) |
3810 | && opt_for_fn (v->decl, optimize)) | |
39e87baf MJ |
3811 | { |
3812 | struct cgraph_edge *cs; | |
310bc633 | 3813 | |
39e87baf | 3814 | estimate_local_effects (v); |
c0cb5055 | 3815 | add_all_node_vals_to_toposort (v, topo); |
39e87baf | 3816 | for (cs = v->callees; cs; cs = cs->next_callee) |
4cb13597 | 3817 | if (!ipa_edge_within_scc (cs)) |
155c9907 | 3818 | propagate_constants_across_call (cs); |
39e87baf MJ |
3819 | } |
3820 | cycle_nodes.release (); | |
518dc859 RL |
3821 | } |
3822 | } | |
3823 | ||
df0227c4 MJ |
3824 | |
3825 | /* Return the sum of A and B if none of them is bigger than INT_MAX/2, return | |
3826 | the bigger one if otherwise. */ | |
3827 | ||
3828 | static int | |
3829 | safe_add (int a, int b) | |
3830 | { | |
3831 | if (a > INT_MAX/2 || b > INT_MAX/2) | |
3832 | return a > b ? a : b; | |
3833 | else | |
3834 | return a + b; | |
3835 | } | |
3836 | ||
3837 | ||
310bc633 | 3838 | /* Propagate the estimated effects of individual values along the topological |
073a8998 | 3839 | from the dependent values to those they depend on. */ |
310bc633 | 3840 | |
c0cb5055 MJ |
3841 | template <typename valtype> |
3842 | void | |
3843 | value_topo_info<valtype>::propagate_effects () | |
518dc859 | 3844 | { |
c0cb5055 | 3845 | ipcp_value<valtype> *base; |
518dc859 | 3846 | |
310bc633 | 3847 | for (base = values_topo; base; base = base->topo_next) |
518dc859 | 3848 | { |
c0cb5055 MJ |
3849 | ipcp_value_source<valtype> *src; |
3850 | ipcp_value<valtype> *val; | |
310bc633 MJ |
3851 | int time = 0, size = 0; |
3852 | ||
3853 | for (val = base; val; val = val->scc_next) | |
3854 | { | |
df0227c4 MJ |
3855 | time = safe_add (time, |
3856 | val->local_time_benefit + val->prop_time_benefit); | |
3857 | size = safe_add (size, val->local_size_cost + val->prop_size_cost); | |
310bc633 MJ |
3858 | } |
3859 | ||
3860 | for (val = base; val; val = val->scc_next) | |
3861 | for (src = val->sources; src; src = src->next) | |
3862 | if (src->val | |
3dafb85c | 3863 | && src->cs->maybe_hot_p ()) |
310bc633 | 3864 | { |
df0227c4 MJ |
3865 | src->val->prop_time_benefit = safe_add (time, |
3866 | src->val->prop_time_benefit); | |
3867 | src->val->prop_size_cost = safe_add (size, | |
3868 | src->val->prop_size_cost); | |
310bc633 | 3869 | } |
518dc859 RL |
3870 | } |
3871 | } | |
3872 | ||
310bc633 | 3873 | |
44210a96 MJ |
3874 | /* Propagate constants, polymorphic contexts and their effects from the |
3875 | summaries interprocedurally. */ | |
310bc633 | 3876 | |
518dc859 | 3877 | static void |
99b1c316 | 3878 | ipcp_propagate_stage (class ipa_topo_info *topo) |
518dc859 RL |
3879 | { |
3880 | struct cgraph_node *node; | |
518dc859 | 3881 | |
310bc633 MJ |
3882 | if (dump_file) |
3883 | fprintf (dump_file, "\n Propagating constants:\n\n"); | |
3884 | ||
e7a74006 JH |
3885 | max_count = profile_count::uninitialized (); |
3886 | ||
310bc633 MJ |
3887 | FOR_EACH_DEFINED_FUNCTION (node) |
3888 | { | |
e72763e2 JH |
3889 | if (node->has_gimple_body_p () |
3890 | && opt_for_fn (node->decl, flag_ipa_cp) | |
3891 | && opt_for_fn (node->decl, optimize)) | |
310bc633 | 3892 | { |
6cf67b62 JH |
3893 | class ipa_node_params *info = IPA_NODE_REF (node); |
3894 | determine_versionability (node, info); | |
99b1c316 | 3895 | info->lattices = XCNEWVEC (class ipcp_param_lattices, |
310bc633 MJ |
3896 | ipa_get_param_count (info)); |
3897 | initialize_node_lattices (node); | |
3898 | } | |
f658ad30 | 3899 | ipa_size_summary *s = ipa_size_summaries->get (node); |
56f62793 ML |
3900 | if (node->definition && !node->alias && s != NULL) |
3901 | overall_size += s->self_size; | |
1bad9c18 | 3902 | max_count = max_count.max (node->count.ipa ()); |
310bc633 MJ |
3903 | } |
3904 | ||
f7725a48 | 3905 | orig_overall_size = overall_size; |
310bc633 MJ |
3906 | |
3907 | if (dump_file) | |
f7725a48 | 3908 | fprintf (dump_file, "\noverall_size: %li\n", overall_size); |
310bc633 MJ |
3909 | |
3910 | propagate_constants_topo (topo); | |
b2b29377 MM |
3911 | if (flag_checking) |
3912 | ipcp_verify_propagated_values (); | |
c0cb5055 | 3913 | topo->constants.propagate_effects (); |
44210a96 | 3914 | topo->contexts.propagate_effects (); |
310bc633 MJ |
3915 | |
3916 | if (dump_file) | |
3917 | { | |
3918 | fprintf (dump_file, "\nIPA lattices after all propagation:\n"); | |
3919 | print_all_lattices (dump_file, (dump_flags & TDF_DETAILS), true); | |
3920 | } | |
3921 | } | |
3922 | ||
3923 | /* Discover newly direct outgoing edges from NODE which is a new clone with | |
44210a96 | 3924 | known KNOWN_CSTS and make them direct. */ |
310bc633 MJ |
3925 | |
3926 | static void | |
3927 | ipcp_discover_new_direct_edges (struct cgraph_node *node, | |
44210a96 MJ |
3928 | vec<tree> known_csts, |
3929 | vec<ipa_polymorphic_call_context> | |
3930 | known_contexts, | |
162712de | 3931 | struct ipa_agg_replacement_value *aggvals) |
310bc633 MJ |
3932 | { |
3933 | struct cgraph_edge *ie, *next_ie; | |
0f378cb5 | 3934 | bool found = false; |
310bc633 MJ |
3935 | |
3936 | for (ie = node->indirect_calls; ie; ie = next_ie) | |
3937 | { | |
81fa35bd | 3938 | tree target; |
231b4916 | 3939 | bool speculative; |
310bc633 MJ |
3940 | |
3941 | next_ie = ie->next_callee; | |
44210a96 | 3942 | target = ipa_get_indirect_edge_target_1 (ie, known_csts, known_contexts, |
231b4916 | 3943 | vNULL, aggvals, &speculative); |
310bc633 | 3944 | if (target) |
0f378cb5 | 3945 | { |
042ae7d2 JH |
3946 | bool agg_contents = ie->indirect_info->agg_contents; |
3947 | bool polymorphic = ie->indirect_info->polymorphic; | |
a4e33812 | 3948 | int param_index = ie->indirect_info->param_index; |
231b4916 JH |
3949 | struct cgraph_edge *cs = ipa_make_edge_direct_to_target (ie, target, |
3950 | speculative); | |
0f378cb5 | 3951 | found = true; |
4502fe8d | 3952 | |
042ae7d2 | 3953 | if (cs && !agg_contents && !polymorphic) |
4502fe8d | 3954 | { |
99b1c316 | 3955 | class ipa_node_params *info = IPA_NODE_REF (node); |
4502fe8d MJ |
3956 | int c = ipa_get_controlled_uses (info, param_index); |
3957 | if (c != IPA_UNDESCRIBED_USE) | |
3958 | { | |
3959 | struct ipa_ref *to_del; | |
3960 | ||
3961 | c--; | |
3962 | ipa_set_controlled_uses (info, param_index, c); | |
3963 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3964 | fprintf (dump_file, " controlled uses count of param " | |
3965 | "%i bumped down to %i\n", param_index, c); | |
3966 | if (c == 0 | |
d122681a | 3967 | && (to_del = node->find_reference (cs->callee, NULL, 0))) |
4502fe8d MJ |
3968 | { |
3969 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
3970 | fprintf (dump_file, " and even removing its " | |
3971 | "cloning-created reference\n"); | |
d122681a | 3972 | to_del->remove_reference (); |
4502fe8d MJ |
3973 | } |
3974 | } | |
3975 | } | |
0f378cb5 | 3976 | } |
310bc633 | 3977 | } |
0f378cb5 JH |
3978 | /* Turning calls to direct calls will improve overall summary. */ |
3979 | if (found) | |
0bceb671 | 3980 | ipa_update_overall_fn_summary (node); |
310bc633 MJ |
3981 | } |
3982 | ||
1ac2bdb4 ML |
3983 | class edge_clone_summary; |
3984 | static call_summary <edge_clone_summary *> *edge_clone_summaries = NULL; | |
310bc633 | 3985 | |
1ac2bdb4 | 3986 | /* Edge clone summary. */ |
310bc633 | 3987 | |
6c1dae73 | 3988 | class edge_clone_summary |
310bc633 | 3989 | { |
6c1dae73 | 3990 | public: |
1ac2bdb4 ML |
3991 | /* Default constructor. */ |
3992 | edge_clone_summary (): prev_clone (NULL), next_clone (NULL) {} | |
aef83682 | 3993 | |
1ac2bdb4 ML |
3994 | /* Default destructor. */ |
3995 | ~edge_clone_summary () | |
3996 | { | |
3997 | if (prev_clone) | |
3998 | edge_clone_summaries->get (prev_clone)->next_clone = next_clone; | |
3999 | if (next_clone) | |
4000 | edge_clone_summaries->get (next_clone)->prev_clone = prev_clone; | |
4001 | } | |
310bc633 | 4002 | |
1ac2bdb4 ML |
4003 | cgraph_edge *prev_clone; |
4004 | cgraph_edge *next_clone; | |
4005 | }; | |
aef83682 | 4006 | |
1ac2bdb4 ML |
4007 | class edge_clone_summary_t: |
4008 | public call_summary <edge_clone_summary *> | |
aef83682 | 4009 | { |
1ac2bdb4 ML |
4010 | public: |
4011 | edge_clone_summary_t (symbol_table *symtab): | |
4012 | call_summary <edge_clone_summary *> (symtab) | |
4013 | { | |
4014 | m_initialize_when_cloning = true; | |
4015 | } | |
aef83682 | 4016 | |
1ac2bdb4 ML |
4017 | virtual void duplicate (cgraph_edge *src_edge, cgraph_edge *dst_edge, |
4018 | edge_clone_summary *src_data, | |
4019 | edge_clone_summary *dst_data); | |
4020 | }; | |
4021 | ||
4022 | /* Edge duplication hook. */ | |
4023 | ||
4024 | void | |
4025 | edge_clone_summary_t::duplicate (cgraph_edge *src_edge, cgraph_edge *dst_edge, | |
4026 | edge_clone_summary *src_data, | |
4027 | edge_clone_summary *dst_data) | |
4028 | { | |
4029 | if (src_data->next_clone) | |
4030 | edge_clone_summaries->get (src_data->next_clone)->prev_clone = dst_edge; | |
4031 | dst_data->prev_clone = src_edge; | |
4032 | dst_data->next_clone = src_data->next_clone; | |
4033 | src_data->next_clone = dst_edge; | |
aef83682 MJ |
4034 | } |
4035 | ||
47f4756e | 4036 | /* Return true is NODE is DEST or its clone for all contexts. */ |
310bc633 MJ |
4037 | |
4038 | static bool | |
47f4756e MJ |
4039 | same_node_or_its_all_contexts_clone_p (cgraph_node *node, cgraph_node *dest) |
4040 | { | |
4041 | if (node == dest) | |
4042 | return true; | |
4043 | ||
99b1c316 | 4044 | class ipa_node_params *info = IPA_NODE_REF (node); |
47f4756e MJ |
4045 | return info->is_all_contexts_clone && info->ipcp_orig_node == dest; |
4046 | } | |
4047 | ||
7b668576 MJ |
4048 | /* Return true if edge CS does bring about the value described by SRC to |
4049 | DEST_VAL of node DEST or its clone for all contexts. */ | |
47f4756e MJ |
4050 | |
4051 | static bool | |
4052 | cgraph_edge_brings_value_p (cgraph_edge *cs, ipcp_value_source<tree> *src, | |
7b668576 | 4053 | cgraph_node *dest, ipcp_value<tree> *dest_val) |
310bc633 | 4054 | { |
99b1c316 | 4055 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
47f4756e MJ |
4056 | enum availability availability; |
4057 | cgraph_node *real_dest = cs->callee->function_symbol (&availability); | |
310bc633 | 4058 | |
6cf67b62 JH |
4059 | if (availability <= AVAIL_INTERPOSABLE |
4060 | || !same_node_or_its_all_contexts_clone_p (real_dest, dest) | |
310bc633 MJ |
4061 | || caller_info->node_dead) |
4062 | return false; | |
2f1f3ac4 MJ |
4063 | |
4064 | if (!src->val) | |
310bc633 MJ |
4065 | return true; |
4066 | ||
4067 | if (caller_info->ipcp_orig_node) | |
4068 | { | |
2c9561b5 MJ |
4069 | tree t; |
4070 | if (src->offset == -1) | |
44210a96 | 4071 | t = caller_info->known_csts[src->index]; |
2c9561b5 MJ |
4072 | else |
4073 | t = get_clone_agg_value (cs->caller, src->offset, src->index); | |
310bc633 MJ |
4074 | return (t != NULL_TREE |
4075 | && values_equal_for_ipcp_p (src->val->value, t)); | |
4076 | } | |
4077 | else | |
518dc859 | 4078 | { |
2f1f3ac4 MJ |
4079 | /* At the moment we do not propagate over arithmetic jump functions in |
4080 | SCCs, so it is safe to detect self-feeding recursive calls in this | |
4081 | way. */ | |
4082 | if (src->val == dest_val) | |
4083 | return true; | |
4084 | ||
2c9561b5 | 4085 | struct ipcp_agg_lattice *aglat; |
99b1c316 | 4086 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (caller_info, |
2c9561b5 MJ |
4087 | src->index); |
4088 | if (src->offset == -1) | |
c0cb5055 | 4089 | return (plats->itself.is_single_const () |
2c9561b5 MJ |
4090 | && values_equal_for_ipcp_p (src->val->value, |
4091 | plats->itself.values->value)); | |
310bc633 | 4092 | else |
2c9561b5 MJ |
4093 | { |
4094 | if (plats->aggs_bottom || plats->aggs_contain_variable) | |
4095 | return false; | |
4096 | for (aglat = plats->aggs; aglat; aglat = aglat->next) | |
4097 | if (aglat->offset == src->offset) | |
c0cb5055 | 4098 | return (aglat->is_single_const () |
2c9561b5 MJ |
4099 | && values_equal_for_ipcp_p (src->val->value, |
4100 | aglat->values->value)); | |
4101 | } | |
4102 | return false; | |
310bc633 MJ |
4103 | } |
4104 | } | |
4105 | ||
7b668576 MJ |
4106 | /* Return true if edge CS does bring about the value described by SRC to |
4107 | DST_VAL of node DEST or its clone for all contexts. */ | |
44210a96 MJ |
4108 | |
4109 | static bool | |
47f4756e MJ |
4110 | cgraph_edge_brings_value_p (cgraph_edge *cs, |
4111 | ipcp_value_source<ipa_polymorphic_call_context> *src, | |
7b668576 MJ |
4112 | cgraph_node *dest, |
4113 | ipcp_value<ipa_polymorphic_call_context> *) | |
44210a96 | 4114 | { |
99b1c316 | 4115 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
6cf67b62 JH |
4116 | enum availability avail; |
4117 | cgraph_node *real_dest = cs->callee->function_symbol (&avail); | |
44210a96 | 4118 | |
6cf67b62 JH |
4119 | if (avail <= AVAIL_INTERPOSABLE |
4120 | || !same_node_or_its_all_contexts_clone_p (real_dest, dest) | |
44210a96 MJ |
4121 | || caller_info->node_dead) |
4122 | return false; | |
4123 | if (!src->val) | |
4124 | return true; | |
4125 | ||
4126 | if (caller_info->ipcp_orig_node) | |
4127 | return (caller_info->known_contexts.length () > (unsigned) src->index) | |
4128 | && values_equal_for_ipcp_p (src->val->value, | |
4129 | caller_info->known_contexts[src->index]); | |
4130 | ||
99b1c316 | 4131 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (caller_info, |
44210a96 MJ |
4132 | src->index); |
4133 | return plats->ctxlat.is_single_const () | |
4134 | && values_equal_for_ipcp_p (src->val->value, | |
4135 | plats->ctxlat.values->value); | |
4136 | } | |
4137 | ||
2c9561b5 MJ |
4138 | /* Get the next clone in the linked list of clones of an edge. */ |
4139 | ||
4140 | static inline struct cgraph_edge * | |
4141 | get_next_cgraph_edge_clone (struct cgraph_edge *cs) | |
4142 | { | |
1ac2bdb4 ML |
4143 | edge_clone_summary *s = edge_clone_summaries->get (cs); |
4144 | return s != NULL ? s->next_clone : NULL; | |
2c9561b5 MJ |
4145 | } |
4146 | ||
7b668576 MJ |
4147 | /* Given VAL that is intended for DEST, iterate over all its sources and if any |
4148 | of them is viable and hot, return true. In that case, for those that still | |
4149 | hold, add their edge frequency and their number into *FREQUENCY and | |
4150 | *CALLER_COUNT respectively. */ | |
310bc633 | 4151 | |
c0cb5055 | 4152 | template <typename valtype> |
310bc633 | 4153 | static bool |
47f4756e MJ |
4154 | get_info_about_necessary_edges (ipcp_value<valtype> *val, cgraph_node *dest, |
4155 | int *freq_sum, | |
3995f3a2 | 4156 | profile_count *count_sum, int *caller_count) |
310bc633 | 4157 | { |
c0cb5055 | 4158 | ipcp_value_source<valtype> *src; |
310bc633 | 4159 | int freq = 0, count = 0; |
3995f3a2 | 4160 | profile_count cnt = profile_count::zero (); |
310bc633 | 4161 | bool hot = false; |
7b668576 | 4162 | bool non_self_recursive = false; |
310bc633 MJ |
4163 | |
4164 | for (src = val->sources; src; src = src->next) | |
4165 | { | |
4166 | struct cgraph_edge *cs = src->cs; | |
4167 | while (cs) | |
518dc859 | 4168 | { |
7b668576 | 4169 | if (cgraph_edge_brings_value_p (cs, src, dest, val)) |
310bc633 MJ |
4170 | { |
4171 | count++; | |
1bad9c18 JH |
4172 | freq += cs->frequency (); |
4173 | if (cs->count.ipa ().initialized_p ()) | |
4174 | cnt += cs->count.ipa (); | |
3dafb85c | 4175 | hot |= cs->maybe_hot_p (); |
7b668576 MJ |
4176 | if (cs->caller != dest) |
4177 | non_self_recursive = true; | |
9b14fc33 FX |
4178 | else if (src->val) |
4179 | gcc_assert (values_equal_for_ipcp_p (src->val->value, | |
4180 | val->value)); | |
310bc633 MJ |
4181 | } |
4182 | cs = get_next_cgraph_edge_clone (cs); | |
518dc859 RL |
4183 | } |
4184 | } | |
310bc633 | 4185 | |
7b668576 MJ |
4186 | /* If the only edges bringing a value are self-recursive ones, do not bother |
4187 | evaluating it. */ | |
4188 | if (!non_self_recursive) | |
4189 | return false; | |
4190 | ||
310bc633 MJ |
4191 | *freq_sum = freq; |
4192 | *count_sum = cnt; | |
4193 | *caller_count = count; | |
9b14fc33 FX |
4194 | |
4195 | if (!hot && IPA_NODE_REF (dest)->node_within_scc) | |
4196 | { | |
4197 | struct cgraph_edge *cs; | |
4198 | ||
4199 | /* Cold non-SCC source edge could trigger hot recursive execution of | |
4200 | function. Consider the case as hot and rely on following cost model | |
4201 | computation to further select right one. */ | |
4202 | for (cs = dest->callers; cs; cs = cs->next_caller) | |
4203 | if (cs->caller == dest && cs->maybe_hot_p ()) | |
4204 | return true; | |
4205 | } | |
4206 | ||
310bc633 | 4207 | return hot; |
518dc859 RL |
4208 | } |
4209 | ||
47f4756e MJ |
4210 | /* Return a vector of incoming edges that do bring value VAL to node DEST. It |
4211 | is assumed their number is known and equal to CALLER_COUNT. */ | |
310bc633 | 4212 | |
c0cb5055 | 4213 | template <typename valtype> |
d52f5295 | 4214 | static vec<cgraph_edge *> |
47f4756e MJ |
4215 | gather_edges_for_value (ipcp_value<valtype> *val, cgraph_node *dest, |
4216 | int caller_count) | |
518dc859 | 4217 | { |
c0cb5055 | 4218 | ipcp_value_source<valtype> *src; |
d52f5295 | 4219 | vec<cgraph_edge *> ret; |
310bc633 | 4220 | |
9771b263 | 4221 | ret.create (caller_count); |
310bc633 MJ |
4222 | for (src = val->sources; src; src = src->next) |
4223 | { | |
4224 | struct cgraph_edge *cs = src->cs; | |
4225 | while (cs) | |
4226 | { | |
7b668576 | 4227 | if (cgraph_edge_brings_value_p (cs, src, dest, val)) |
9771b263 | 4228 | ret.quick_push (cs); |
310bc633 MJ |
4229 | cs = get_next_cgraph_edge_clone (cs); |
4230 | } | |
4231 | } | |
4232 | ||
4233 | return ret; | |
518dc859 RL |
4234 | } |
4235 | ||
310bc633 MJ |
4236 | /* Construct a replacement map for a know VALUE for a formal parameter PARAM. |
4237 | Return it or NULL if for some reason it cannot be created. */ | |
4238 | ||
518dc859 | 4239 | static struct ipa_replace_map * |
99b1c316 | 4240 | get_replacement_map (class ipa_node_params *info, tree value, int parm_num) |
518dc859 RL |
4241 | { |
4242 | struct ipa_replace_map *replace_map; | |
518dc859 | 4243 | |
310bc633 | 4244 | |
766090c2 | 4245 | replace_map = ggc_alloc<ipa_replace_map> (); |
c6f7cfc1 JH |
4246 | if (dump_file) |
4247 | { | |
0e8853ee JH |
4248 | fprintf (dump_file, " replacing "); |
4249 | ipa_dump_param (dump_file, info, parm_num); | |
155c9907 | 4250 | |
c6f7cfc1 | 4251 | fprintf (dump_file, " with const "); |
ef6cb4c7 | 4252 | print_generic_expr (dump_file, value); |
c6f7cfc1 JH |
4253 | fprintf (dump_file, "\n"); |
4254 | } | |
49bde175 | 4255 | replace_map->parm_num = parm_num; |
310bc633 | 4256 | replace_map->new_tree = value; |
518dc859 RL |
4257 | return replace_map; |
4258 | } | |
4259 | ||
310bc633 | 4260 | /* Dump new profiling counts */ |
518dc859 | 4261 | |
518dc859 | 4262 | static void |
310bc633 MJ |
4263 | dump_profile_updates (struct cgraph_node *orig_node, |
4264 | struct cgraph_node *new_node) | |
518dc859 | 4265 | { |
310bc633 | 4266 | struct cgraph_edge *cs; |
518dc859 | 4267 | |
3995f3a2 JH |
4268 | fprintf (dump_file, " setting count of the specialized node to "); |
4269 | new_node->count.dump (dump_file); | |
4270 | fprintf (dump_file, "\n"); | |
155c9907 | 4271 | for (cs = new_node->callees; cs; cs = cs->next_callee) |
3995f3a2 JH |
4272 | { |
4273 | fprintf (dump_file, " edge to %s has count ", | |
3629ff8a | 4274 | cs->callee->dump_name ()); |
3995f3a2 JH |
4275 | cs->count.dump (dump_file); |
4276 | fprintf (dump_file, "\n"); | |
4277 | } | |
310bc633 | 4278 | |
3995f3a2 JH |
4279 | fprintf (dump_file, " setting count of the original node to "); |
4280 | orig_node->count.dump (dump_file); | |
4281 | fprintf (dump_file, "\n"); | |
155c9907 | 4282 | for (cs = orig_node->callees; cs; cs = cs->next_callee) |
3995f3a2 JH |
4283 | { |
4284 | fprintf (dump_file, " edge to %s is left with ", | |
3629ff8a | 4285 | cs->callee->dump_name ()); |
3995f3a2 JH |
4286 | cs->count.dump (dump_file); |
4287 | fprintf (dump_file, "\n"); | |
4288 | } | |
310bc633 | 4289 | } |
c6f7cfc1 | 4290 | |
310bc633 MJ |
4291 | /* After a specialized NEW_NODE version of ORIG_NODE has been created, update |
4292 | their profile information to reflect this. */ | |
518dc859 | 4293 | |
518dc859 | 4294 | static void |
310bc633 MJ |
4295 | update_profiling_info (struct cgraph_node *orig_node, |
4296 | struct cgraph_node *new_node) | |
518dc859 | 4297 | { |
518dc859 | 4298 | struct cgraph_edge *cs; |
310bc633 | 4299 | struct caller_statistics stats; |
3995f3a2 JH |
4300 | profile_count new_sum, orig_sum; |
4301 | profile_count remainder, orig_node_count = orig_node->count; | |
2e7fd867 | 4302 | profile_count orig_new_node_count = new_node->count; |
310bc633 | 4303 | |
1bad9c18 | 4304 | if (!(orig_node_count.ipa () > profile_count::zero ())) |
310bc633 | 4305 | return; |
518dc859 | 4306 | |
310bc633 | 4307 | init_caller_stats (&stats); |
d52f5295 ML |
4308 | orig_node->call_for_symbol_thunks_and_aliases (gather_caller_stats, &stats, |
4309 | false); | |
310bc633 MJ |
4310 | orig_sum = stats.count_sum; |
4311 | init_caller_stats (&stats); | |
d52f5295 ML |
4312 | new_node->call_for_symbol_thunks_and_aliases (gather_caller_stats, &stats, |
4313 | false); | |
310bc633 MJ |
4314 | new_sum = stats.count_sum; |
4315 | ||
4316 | if (orig_node_count < orig_sum + new_sum) | |
518dc859 | 4317 | { |
310bc633 | 4318 | if (dump_file) |
3995f3a2 JH |
4319 | { |
4320 | fprintf (dump_file, " Problem: node %s has too low count ", | |
4321 | orig_node->dump_name ()); | |
4322 | orig_node_count.dump (dump_file); | |
4323 | fprintf (dump_file, "while the sum of incoming count is "); | |
4324 | (orig_sum + new_sum).dump (dump_file); | |
4325 | fprintf (dump_file, "\n"); | |
4326 | } | |
4327 | ||
4328 | orig_node_count = (orig_sum + new_sum).apply_scale (12, 10); | |
310bc633 | 4329 | if (dump_file) |
3995f3a2 JH |
4330 | { |
4331 | fprintf (dump_file, " proceeding by pretending it was "); | |
4332 | orig_node_count.dump (dump_file); | |
4333 | fprintf (dump_file, "\n"); | |
4334 | } | |
518dc859 | 4335 | } |
310bc633 | 4336 | |
517048ce JH |
4337 | remainder = orig_node_count.combine_with_ipa_count (orig_node_count.ipa () |
4338 | - new_sum.ipa ()); | |
34fbe3f0 JH |
4339 | |
4340 | /* With partial train run we do not want to assume that original's | |
4341 | count is zero whenever we redurect all executed edges to clone. | |
4342 | Simply drop profile to local one in this case. */ | |
4343 | if (remainder.ipa_p () && !remainder.ipa ().nonzero_p () | |
4344 | && orig_node->count.ipa_p () && orig_node->count.ipa ().nonzero_p () | |
4345 | && flag_profile_partial_training) | |
4346 | remainder = remainder.guessed_local (); | |
4347 | ||
517048ce | 4348 | new_sum = orig_node_count.combine_with_ipa_count (new_sum); |
2e7fd867 | 4349 | new_node->count = new_sum; |
310bc633 MJ |
4350 | orig_node->count = remainder; |
4351 | ||
2e7fd867 | 4352 | profile_count::adjust_for_ipa_scaling (&new_sum, &orig_new_node_count); |
155c9907 | 4353 | for (cs = new_node->callees; cs; cs = cs->next_callee) |
2e7fd867 JH |
4354 | cs->count = cs->count.apply_scale (new_sum, orig_new_node_count); |
4355 | for (cs = new_node->indirect_calls; cs; cs = cs->next_callee) | |
4356 | cs->count = cs->count.apply_scale (new_sum, orig_new_node_count); | |
310bc633 | 4357 | |
5a686851 | 4358 | profile_count::adjust_for_ipa_scaling (&remainder, &orig_node_count); |
155c9907 | 4359 | for (cs = orig_node->callees; cs; cs = cs->next_callee) |
3995f3a2 | 4360 | cs->count = cs->count.apply_scale (remainder, orig_node_count); |
2e7fd867 JH |
4361 | for (cs = orig_node->indirect_calls; cs; cs = cs->next_callee) |
4362 | cs->count = cs->count.apply_scale (remainder, orig_node_count); | |
310bc633 MJ |
4363 | |
4364 | if (dump_file) | |
4365 | dump_profile_updates (orig_node, new_node); | |
518dc859 RL |
4366 | } |
4367 | ||
310bc633 MJ |
4368 | /* Update the respective profile of specialized NEW_NODE and the original |
4369 | ORIG_NODE after additional edges with cumulative count sum REDIRECTED_SUM | |
4370 | have been redirected to the specialized version. */ | |
4371 | ||
4372 | static void | |
4373 | update_specialized_profile (struct cgraph_node *new_node, | |
4374 | struct cgraph_node *orig_node, | |
3995f3a2 | 4375 | profile_count redirected_sum) |
5e45130d | 4376 | { |
a065d52e | 4377 | struct cgraph_edge *cs; |
3995f3a2 | 4378 | profile_count new_node_count, orig_node_count = orig_node->count; |
5e45130d | 4379 | |
310bc633 | 4380 | if (dump_file) |
3995f3a2 JH |
4381 | { |
4382 | fprintf (dump_file, " the sum of counts of redirected edges is "); | |
4383 | redirected_sum.dump (dump_file); | |
4384 | fprintf (dump_file, "\n"); | |
4385 | } | |
4386 | if (!(orig_node_count > profile_count::zero ())) | |
310bc633 | 4387 | return; |
a065d52e | 4388 | |
310bc633 | 4389 | gcc_assert (orig_node_count >= redirected_sum); |
5e45130d | 4390 | |
310bc633 MJ |
4391 | new_node_count = new_node->count; |
4392 | new_node->count += redirected_sum; | |
4393 | orig_node->count -= redirected_sum; | |
a065d52e | 4394 | |
155c9907 | 4395 | for (cs = new_node->callees; cs; cs = cs->next_callee) |
e3951b03 | 4396 | cs->count += cs->count.apply_scale (redirected_sum, new_node_count); |
a065d52e | 4397 | |
155c9907 | 4398 | for (cs = orig_node->callees; cs; cs = cs->next_callee) |
310bc633 | 4399 | { |
3995f3a2 JH |
4400 | profile_count dec = cs->count.apply_scale (redirected_sum, |
4401 | orig_node_count); | |
4402 | cs->count -= dec; | |
310bc633 | 4403 | } |
a065d52e | 4404 | |
310bc633 MJ |
4405 | if (dump_file) |
4406 | dump_profile_updates (orig_node, new_node); | |
5e45130d JH |
4407 | } |
4408 | ||
ff6686d2 MJ |
4409 | /* Return true if we would like to remove a parameter from NODE when cloning it |
4410 | with KNOWN_CSTS scalar constants. */ | |
4411 | ||
4412 | static bool | |
4413 | want_remove_some_param_p (cgraph_node *node, vec<tree> known_csts) | |
4414 | { | |
4415 | auto_vec<bool, 16> surviving; | |
4416 | bool filled_vec = false; | |
4417 | ipa_node_params *info = IPA_NODE_REF (node); | |
4418 | int i, count = ipa_get_param_count (info); | |
4419 | ||
4420 | for (i = 0; i < count; i++) | |
4421 | { | |
4422 | if (!known_csts[i] && ipa_is_param_used (info, i)) | |
4423 | continue; | |
4424 | ||
4425 | if (!filled_vec) | |
4426 | { | |
4427 | if (!node->clone.param_adjustments) | |
4428 | return true; | |
4429 | node->clone.param_adjustments->get_surviving_params (&surviving); | |
4430 | filled_vec = true; | |
4431 | } | |
4432 | if (surviving.length() < (unsigned) i && surviving[i]) | |
4433 | return true; | |
4434 | } | |
4435 | return false; | |
4436 | } | |
4437 | ||
44210a96 MJ |
4438 | /* Create a specialized version of NODE with known constants in KNOWN_CSTS, |
4439 | known contexts in KNOWN_CONTEXTS and known aggregate values in AGGVALS and | |
4440 | redirect all edges in CALLERS to it. */ | |
a065d52e | 4441 | |
310bc633 MJ |
4442 | static struct cgraph_node * |
4443 | create_specialized_node (struct cgraph_node *node, | |
44210a96 MJ |
4444 | vec<tree> known_csts, |
4445 | vec<ipa_polymorphic_call_context> known_contexts, | |
2c9561b5 | 4446 | struct ipa_agg_replacement_value *aggvals, |
d52f5295 | 4447 | vec<cgraph_edge *> callers) |
5e45130d | 4448 | { |
99b1c316 | 4449 | class ipa_node_params *new_info, *info = IPA_NODE_REF (node); |
d52f5295 | 4450 | vec<ipa_replace_map *, va_gc> *replace_trees = NULL; |
ff6686d2 | 4451 | vec<ipa_adjusted_param, va_gc> *new_params = NULL; |
79ee9826 | 4452 | struct ipa_agg_replacement_value *av; |
310bc633 MJ |
4453 | struct cgraph_node *new_node; |
4454 | int i, count = ipa_get_param_count (info); | |
ff6686d2 MJ |
4455 | ipa_param_adjustments *old_adjustments = node->clone.param_adjustments; |
4456 | ipa_param_adjustments *new_adjustments; | |
310bc633 | 4457 | gcc_assert (!info->ipcp_orig_node); |
87f94429 | 4458 | gcc_assert (node->can_change_signature |
ff6686d2 MJ |
4459 | || !old_adjustments); |
4460 | ||
4461 | if (old_adjustments) | |
4462 | { | |
4463 | /* At the moment all IPA optimizations should use the number of | |
4464 | parameters of the prevailing decl as the m_always_copy_start. | |
4465 | Handling any other value would complicate the code below, so for the | |
4466 | time bing let's only assert it is so. */ | |
4467 | gcc_assert (old_adjustments->m_always_copy_start == count | |
4468 | || old_adjustments->m_always_copy_start < 0); | |
4469 | int old_adj_count = vec_safe_length (old_adjustments->m_adj_params); | |
4470 | for (i = 0; i < old_adj_count; i++) | |
310bc633 | 4471 | { |
ff6686d2 | 4472 | ipa_adjusted_param *old_adj = &(*old_adjustments->m_adj_params)[i]; |
87f94429 | 4473 | if (!node->can_change_signature |
ff6686d2 MJ |
4474 | || old_adj->op != IPA_PARAM_OP_COPY |
4475 | || (!known_csts[old_adj->base_index] | |
4476 | && ipa_is_param_used (info, old_adj->base_index))) | |
4477 | { | |
4478 | ipa_adjusted_param new_adj = *old_adj; | |
310bc633 | 4479 | |
ff6686d2 MJ |
4480 | new_adj.prev_clone_adjustment = true; |
4481 | new_adj.prev_clone_index = i; | |
4482 | vec_safe_push (new_params, new_adj); | |
4483 | } | |
310bc633 | 4484 | } |
ff6686d2 MJ |
4485 | bool skip_return = old_adjustments->m_skip_return; |
4486 | new_adjustments = (new (ggc_alloc <ipa_param_adjustments> ()) | |
4487 | ipa_param_adjustments (new_params, count, | |
4488 | skip_return)); | |
310bc633 | 4489 | } |
87f94429 | 4490 | else if (node->can_change_signature |
ff6686d2 | 4491 | && want_remove_some_param_p (node, known_csts)) |
d7da5cc8 | 4492 | { |
ff6686d2 MJ |
4493 | ipa_adjusted_param adj; |
4494 | memset (&adj, 0, sizeof (adj)); | |
4495 | adj.op = IPA_PARAM_OP_COPY; | |
4496 | for (i = 0; i < count; i++) | |
4497 | if (!known_csts[i] && ipa_is_param_used (info, i)) | |
4498 | { | |
4499 | adj.base_index = i; | |
4500 | adj.prev_clone_index = i; | |
4501 | vec_safe_push (new_params, adj); | |
4502 | } | |
4503 | new_adjustments = (new (ggc_alloc <ipa_param_adjustments> ()) | |
4504 | ipa_param_adjustments (new_params, count, false)); | |
d7da5cc8 | 4505 | } |
ff6686d2 MJ |
4506 | else |
4507 | new_adjustments = NULL; | |
310bc633 | 4508 | |
ff6686d2 | 4509 | replace_trees = vec_safe_copy (node->clone.tree_map); |
155c9907 | 4510 | for (i = 0; i < count; i++) |
310bc633 | 4511 | { |
44210a96 MJ |
4512 | tree t = known_csts[i]; |
4513 | if (t) | |
310bc633 MJ |
4514 | { |
4515 | struct ipa_replace_map *replace_map; | |
4516 | ||
44210a96 | 4517 | gcc_checking_assert (TREE_CODE (t) != TREE_BINFO); |
0e8853ee | 4518 | replace_map = get_replacement_map (info, t, i); |
310bc633 | 4519 | if (replace_map) |
9771b263 | 4520 | vec_safe_push (replace_trees, replace_map); |
310bc633 | 4521 | } |
5e45130d | 4522 | } |
7b668576 MJ |
4523 | auto_vec<cgraph_edge *, 2> self_recursive_calls; |
4524 | for (i = callers.length () - 1; i >= 0; i--) | |
4525 | { | |
4526 | cgraph_edge *cs = callers[i]; | |
4527 | if (cs->caller == node) | |
4528 | { | |
4529 | self_recursive_calls.safe_push (cs); | |
4530 | callers.unordered_remove (i); | |
4531 | } | |
4532 | } | |
5e45130d | 4533 | |
9e0b0ec3 MP |
4534 | unsigned &suffix_counter = clone_num_suffixes->get_or_insert ( |
4535 | IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME ( | |
4536 | node->decl))); | |
d52f5295 | 4537 | new_node = node->create_virtual_clone (callers, replace_trees, |
ff6686d2 | 4538 | new_adjustments, "constprop", |
53aedcce MP |
4539 | suffix_counter); |
4540 | suffix_counter++; | |
7b668576 | 4541 | |
5bf31c64 | 4542 | bool have_self_recursive_calls = !self_recursive_calls.is_empty (); |
7b668576 MJ |
4543 | for (unsigned j = 0; j < self_recursive_calls.length (); j++) |
4544 | { | |
1ac2bdb4 | 4545 | cgraph_edge *cs = get_next_cgraph_edge_clone (self_recursive_calls[j]); |
5fc1b920 MJ |
4546 | /* Cloned edges can disappear during cloning as speculation can be |
4547 | resolved, check that we have one and that it comes from the last | |
4548 | cloning. */ | |
4549 | if (cs && cs->caller == new_node) | |
4550 | cs->redirect_callee_duplicating_thunks (new_node); | |
4551 | /* Any future code that would make more than one clone of an outgoing | |
4552 | edge would confuse this mechanism, so let's check that does not | |
4553 | happen. */ | |
4554 | gcc_checking_assert (!cs | |
1ac2bdb4 ML |
4555 | || !get_next_cgraph_edge_clone (cs) |
4556 | || get_next_cgraph_edge_clone (cs)->caller != new_node); | |
7b668576 | 4557 | } |
5bf31c64 MJ |
4558 | if (have_self_recursive_calls) |
4559 | new_node->expand_all_artificial_thunks (); | |
7b668576 | 4560 | |
2c9561b5 | 4561 | ipa_set_node_agg_value_chain (new_node, aggvals); |
79ee9826 | 4562 | for (av = aggvals; av; av = av->next) |
2d8d3ae2 | 4563 | new_node->maybe_create_reference (av->value, NULL); |
79ee9826 | 4564 | |
310bc633 | 4565 | if (dump_file && (dump_flags & TDF_DETAILS)) |
2c9561b5 | 4566 | { |
464d0118 | 4567 | fprintf (dump_file, " the new node is %s.\n", new_node->dump_name ()); |
44210a96 MJ |
4568 | if (known_contexts.exists ()) |
4569 | { | |
155c9907 | 4570 | for (i = 0; i < count; i++) |
44210a96 MJ |
4571 | if (!known_contexts[i].useless_p ()) |
4572 | { | |
4573 | fprintf (dump_file, " known ctx %i is ", i); | |
4574 | known_contexts[i].dump (dump_file); | |
4575 | } | |
4576 | } | |
2c9561b5 MJ |
4577 | if (aggvals) |
4578 | ipa_dump_agg_replacement_values (dump_file, aggvals); | |
4579 | } | |
9de6f6c3 | 4580 | ipa_check_create_node_params (); |
310bc633 MJ |
4581 | update_profiling_info (node, new_node); |
4582 | new_info = IPA_NODE_REF (new_node); | |
4583 | new_info->ipcp_orig_node = node; | |
6cf67b62 | 4584 | new_node->ipcp_clone = true; |
44210a96 MJ |
4585 | new_info->known_csts = known_csts; |
4586 | new_info->known_contexts = known_contexts; | |
5e45130d | 4587 | |
44210a96 | 4588 | ipcp_discover_new_direct_edges (new_node, known_csts, known_contexts, aggvals); |
310bc633 | 4589 | |
9771b263 | 4590 | callers.release (); |
310bc633 | 4591 | return new_node; |
5e45130d JH |
4592 | } |
4593 | ||
7b668576 MJ |
4594 | /* Return true, if JFUNC, which describes a i-th parameter of call CS, is a |
4595 | simple no-operation pass-through function to itself. */ | |
4596 | ||
4597 | static bool | |
4598 | self_recursive_pass_through_p (cgraph_edge *cs, ipa_jump_func *jfunc, int i) | |
4599 | { | |
4600 | enum availability availability; | |
4601 | if (cs->caller == cs->callee->function_symbol (&availability) | |
4602 | && availability > AVAIL_INTERPOSABLE | |
4603 | && jfunc->type == IPA_JF_PASS_THROUGH | |
4604 | && ipa_get_jf_pass_through_operation (jfunc) == NOP_EXPR | |
4605 | && ipa_get_jf_pass_through_formal_id (jfunc) == i) | |
4606 | return true; | |
4607 | return false; | |
4608 | } | |
4609 | ||
951e27f5 FX |
4610 | /* Return true, if JFUNC, which describes a part of an aggregate represented |
4611 | or pointed to by the i-th parameter of call CS, is a simple no-operation | |
4612 | pass-through function to itself. */ | |
4613 | ||
4614 | static bool | |
4615 | self_recursive_agg_pass_through_p (cgraph_edge *cs, ipa_agg_jf_item *jfunc, | |
4616 | int i) | |
4617 | { | |
4618 | enum availability availability; | |
4619 | if (cs->caller == cs->callee->function_symbol (&availability) | |
4620 | && availability > AVAIL_INTERPOSABLE | |
4621 | && jfunc->jftype == IPA_JF_LOAD_AGG | |
4622 | && jfunc->offset == jfunc->value.load_agg.offset | |
4623 | && jfunc->value.pass_through.operation == NOP_EXPR | |
4624 | && jfunc->value.pass_through.formal_id == i) | |
4625 | return true; | |
4626 | return false; | |
4627 | } | |
4628 | ||
310bc633 | 4629 | /* Given a NODE, and a subset of its CALLERS, try to populate blanks slots in |
44210a96 | 4630 | KNOWN_CSTS with constants that are also known for all of the CALLERS. */ |
3949c4a7 MJ |
4631 | |
4632 | static void | |
2c9561b5 | 4633 | find_more_scalar_values_for_callers_subset (struct cgraph_node *node, |
44210a96 | 4634 | vec<tree> known_csts, |
d52f5295 | 4635 | vec<cgraph_edge *> callers) |
3949c4a7 | 4636 | { |
99b1c316 | 4637 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 | 4638 | int i, count = ipa_get_param_count (info); |
3949c4a7 | 4639 | |
155c9907 | 4640 | for (i = 0; i < count; i++) |
3949c4a7 | 4641 | { |
310bc633 MJ |
4642 | struct cgraph_edge *cs; |
4643 | tree newval = NULL_TREE; | |
4644 | int j; | |
df0d8136 | 4645 | bool first = true; |
e5cf5e11 | 4646 | tree type = ipa_get_type (info, i); |
3949c4a7 | 4647 | |
44210a96 | 4648 | if (ipa_get_scalar_lat (info, i)->bottom || known_csts[i]) |
3949c4a7 MJ |
4649 | continue; |
4650 | ||
9771b263 | 4651 | FOR_EACH_VEC_ELT (callers, j, cs) |
49c471e3 | 4652 | { |
310bc633 MJ |
4653 | struct ipa_jump_func *jump_func; |
4654 | tree t; | |
40591473 | 4655 | |
68188fff | 4656 | if (IPA_NODE_REF (cs->caller) && IPA_NODE_REF (cs->caller)->node_dead) |
7b668576 MJ |
4657 | continue; |
4658 | ||
a33c028e JH |
4659 | if (!IPA_EDGE_REF (cs) |
4660 | || i >= ipa_get_cs_argument_count (IPA_EDGE_REF (cs)) | |
173b7355 | 4661 | || (i == 0 |
31db0fe0 | 4662 | && call_passes_through_thunk_p (cs))) |
155c9907 JJ |
4663 | { |
4664 | newval = NULL_TREE; | |
4665 | break; | |
4666 | } | |
310bc633 | 4667 | jump_func = ipa_get_ith_jump_func (IPA_EDGE_REF (cs), i); |
7b668576 MJ |
4668 | if (self_recursive_pass_through_p (cs, jump_func, i)) |
4669 | continue; | |
4670 | ||
e5cf5e11 | 4671 | t = ipa_value_from_jfunc (IPA_NODE_REF (cs->caller), jump_func, type); |
310bc633 MJ |
4672 | if (!t |
4673 | || (newval | |
df0d8136 JH |
4674 | && !values_equal_for_ipcp_p (t, newval)) |
4675 | || (!first && !newval)) | |
3949c4a7 | 4676 | { |
310bc633 MJ |
4677 | newval = NULL_TREE; |
4678 | break; | |
3949c4a7 | 4679 | } |
310bc633 MJ |
4680 | else |
4681 | newval = t; | |
df0d8136 | 4682 | first = false; |
3949c4a7 MJ |
4683 | } |
4684 | ||
310bc633 MJ |
4685 | if (newval) |
4686 | { | |
4687 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
4688 | { | |
2c9561b5 | 4689 | fprintf (dump_file, " adding an extra known scalar value "); |
310bc633 | 4690 | print_ipcp_constant_value (dump_file, newval); |
0e8853ee JH |
4691 | fprintf (dump_file, " for "); |
4692 | ipa_dump_param (dump_file, info, i); | |
310bc633 MJ |
4693 | fprintf (dump_file, "\n"); |
4694 | } | |
5e45130d | 4695 | |
44210a96 | 4696 | known_csts[i] = newval; |
310bc633 | 4697 | } |
5e45130d | 4698 | } |
5e45130d JH |
4699 | } |
4700 | ||
44210a96 MJ |
4701 | /* Given a NODE and a subset of its CALLERS, try to populate plank slots in |
4702 | KNOWN_CONTEXTS with polymorphic contexts that are also known for all of the | |
4703 | CALLERS. */ | |
4704 | ||
4705 | static void | |
4706 | find_more_contexts_for_caller_subset (cgraph_node *node, | |
4707 | vec<ipa_polymorphic_call_context> | |
4708 | *known_contexts, | |
4709 | vec<cgraph_edge *> callers) | |
4710 | { | |
4711 | ipa_node_params *info = IPA_NODE_REF (node); | |
4712 | int i, count = ipa_get_param_count (info); | |
4713 | ||
155c9907 | 4714 | for (i = 0; i < count; i++) |
44210a96 MJ |
4715 | { |
4716 | cgraph_edge *cs; | |
4717 | ||
4718 | if (ipa_get_poly_ctx_lat (info, i)->bottom | |
4719 | || (known_contexts->exists () | |
4720 | && !(*known_contexts)[i].useless_p ())) | |
4721 | continue; | |
4722 | ||
4723 | ipa_polymorphic_call_context newval; | |
df0d8136 | 4724 | bool first = true; |
44210a96 MJ |
4725 | int j; |
4726 | ||
4727 | FOR_EACH_VEC_ELT (callers, j, cs) | |
4728 | { | |
a33c028e JH |
4729 | if (!IPA_EDGE_REF (cs) |
4730 | || i >= ipa_get_cs_argument_count (IPA_EDGE_REF (cs))) | |
44210a96 MJ |
4731 | return; |
4732 | ipa_jump_func *jfunc = ipa_get_ith_jump_func (IPA_EDGE_REF (cs), | |
4733 | i); | |
4734 | ipa_polymorphic_call_context ctx; | |
4735 | ctx = ipa_context_from_jfunc (IPA_NODE_REF (cs->caller), cs, i, | |
4736 | jfunc); | |
df0d8136 | 4737 | if (first) |
44210a96 | 4738 | { |
44210a96 | 4739 | newval = ctx; |
df0d8136 | 4740 | first = false; |
44210a96 | 4741 | } |
df0d8136 JH |
4742 | else |
4743 | newval.meet_with (ctx); | |
4744 | if (newval.useless_p ()) | |
4745 | break; | |
44210a96 MJ |
4746 | } |
4747 | ||
df0d8136 | 4748 | if (!newval.useless_p ()) |
44210a96 MJ |
4749 | { |
4750 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
4751 | { | |
4752 | fprintf (dump_file, " adding an extra known polymorphic " | |
4753 | "context "); | |
4754 | print_ipcp_constant_value (dump_file, newval); | |
4755 | fprintf (dump_file, " for "); | |
4756 | ipa_dump_param (dump_file, info, i); | |
4757 | fprintf (dump_file, "\n"); | |
4758 | } | |
4759 | ||
4760 | if (!known_contexts->exists ()) | |
4761 | known_contexts->safe_grow_cleared (ipa_get_param_count (info)); | |
4762 | (*known_contexts)[i] = newval; | |
4763 | } | |
4764 | ||
4765 | } | |
4766 | } | |
4767 | ||
2c9561b5 MJ |
4768 | /* Go through PLATS and create a vector of values consisting of values and |
4769 | offsets (minus OFFSET) of lattices that contain only a single value. */ | |
4770 | ||
eb270950 | 4771 | static vec<ipa_agg_value> |
99b1c316 | 4772 | copy_plats_to_inter (class ipcp_param_lattices *plats, HOST_WIDE_INT offset) |
2c9561b5 | 4773 | { |
eb270950 | 4774 | vec<ipa_agg_value> res = vNULL; |
2c9561b5 MJ |
4775 | |
4776 | if (!plats->aggs || plats->aggs_contain_variable || plats->aggs_bottom) | |
6e1aa848 | 4777 | return vNULL; |
2c9561b5 MJ |
4778 | |
4779 | for (struct ipcp_agg_lattice *aglat = plats->aggs; aglat; aglat = aglat->next) | |
c0cb5055 | 4780 | if (aglat->is_single_const ()) |
2c9561b5 | 4781 | { |
eb270950 | 4782 | struct ipa_agg_value ti; |
2c9561b5 MJ |
4783 | ti.offset = aglat->offset - offset; |
4784 | ti.value = aglat->values->value; | |
9771b263 | 4785 | res.safe_push (ti); |
2c9561b5 MJ |
4786 | } |
4787 | return res; | |
4788 | } | |
4789 | ||
4790 | /* Intersect all values in INTER with single value lattices in PLATS (while | |
4791 | subtracting OFFSET). */ | |
4792 | ||
4793 | static void | |
99b1c316 | 4794 | intersect_with_plats (class ipcp_param_lattices *plats, |
eb270950 | 4795 | vec<ipa_agg_value> *inter, |
2c9561b5 MJ |
4796 | HOST_WIDE_INT offset) |
4797 | { | |
4798 | struct ipcp_agg_lattice *aglat; | |
eb270950 | 4799 | struct ipa_agg_value *item; |
2c9561b5 MJ |
4800 | int k; |
4801 | ||
4802 | if (!plats->aggs || plats->aggs_contain_variable || plats->aggs_bottom) | |
4803 | { | |
9771b263 | 4804 | inter->release (); |
2c9561b5 MJ |
4805 | return; |
4806 | } | |
4807 | ||
4808 | aglat = plats->aggs; | |
9771b263 | 4809 | FOR_EACH_VEC_ELT (*inter, k, item) |
2c9561b5 MJ |
4810 | { |
4811 | bool found = false; | |
4812 | if (!item->value) | |
4813 | continue; | |
4814 | while (aglat) | |
4815 | { | |
4816 | if (aglat->offset - offset > item->offset) | |
4817 | break; | |
4818 | if (aglat->offset - offset == item->offset) | |
4819 | { | |
4820 | gcc_checking_assert (item->value); | |
951e27f5 FX |
4821 | if (aglat->is_single_const ()) |
4822 | { | |
4823 | tree value = aglat->values->value; | |
4824 | ||
4825 | if (values_equal_for_ipcp_p (item->value, value)) | |
4826 | found = true; | |
4827 | else if (item->value == error_mark_node) | |
4828 | { | |
4829 | /* Replace unknown place holder value with real one. */ | |
4830 | item->value = value; | |
4831 | found = true; | |
4832 | } | |
4833 | } | |
2c9561b5 MJ |
4834 | break; |
4835 | } | |
4836 | aglat = aglat->next; | |
4837 | } | |
4838 | if (!found) | |
4839 | item->value = NULL_TREE; | |
4840 | } | |
4841 | } | |
4842 | ||
5764ee3c | 4843 | /* Copy aggregate replacement values of NODE (which is an IPA-CP clone) to the |
2c9561b5 MJ |
4844 | vector result while subtracting OFFSET from the individual value offsets. */ |
4845 | ||
eb270950 | 4846 | static vec<ipa_agg_value> |
0fd44da3 MJ |
4847 | agg_replacements_to_vector (struct cgraph_node *node, int index, |
4848 | HOST_WIDE_INT offset) | |
2c9561b5 MJ |
4849 | { |
4850 | struct ipa_agg_replacement_value *av; | |
eb270950 | 4851 | vec<ipa_agg_value> res = vNULL; |
2c9561b5 MJ |
4852 | |
4853 | for (av = ipa_get_agg_replacements_for_node (node); av; av = av->next) | |
0fd44da3 MJ |
4854 | if (av->index == index |
4855 | && (av->offset - offset) >= 0) | |
2c9561b5 | 4856 | { |
eb270950 | 4857 | struct ipa_agg_value item; |
2c9561b5 MJ |
4858 | gcc_checking_assert (av->value); |
4859 | item.offset = av->offset - offset; | |
4860 | item.value = av->value; | |
9771b263 | 4861 | res.safe_push (item); |
2c9561b5 MJ |
4862 | } |
4863 | ||
4864 | return res; | |
4865 | } | |
4866 | ||
4867 | /* Intersect all values in INTER with those that we have already scheduled to | |
4868 | be replaced in parameter number INDEX of NODE, which is an IPA-CP clone | |
4869 | (while subtracting OFFSET). */ | |
4870 | ||
4871 | static void | |
4872 | intersect_with_agg_replacements (struct cgraph_node *node, int index, | |
eb270950 | 4873 | vec<ipa_agg_value> *inter, |
2c9561b5 MJ |
4874 | HOST_WIDE_INT offset) |
4875 | { | |
4876 | struct ipa_agg_replacement_value *srcvals; | |
eb270950 | 4877 | struct ipa_agg_value *item; |
2c9561b5 MJ |
4878 | int i; |
4879 | ||
4880 | srcvals = ipa_get_agg_replacements_for_node (node); | |
4881 | if (!srcvals) | |
4882 | { | |
9771b263 | 4883 | inter->release (); |
2c9561b5 MJ |
4884 | return; |
4885 | } | |
4886 | ||
9771b263 | 4887 | FOR_EACH_VEC_ELT (*inter, i, item) |
2c9561b5 MJ |
4888 | { |
4889 | struct ipa_agg_replacement_value *av; | |
4890 | bool found = false; | |
4891 | if (!item->value) | |
4892 | continue; | |
4893 | for (av = srcvals; av; av = av->next) | |
4894 | { | |
4895 | gcc_checking_assert (av->value); | |
4896 | if (av->index == index | |
4897 | && av->offset - offset == item->offset) | |
4898 | { | |
4899 | if (values_equal_for_ipcp_p (item->value, av->value)) | |
4900 | found = true; | |
951e27f5 FX |
4901 | else if (item->value == error_mark_node) |
4902 | { | |
4903 | /* Replace place holder value with real one. */ | |
4904 | item->value = av->value; | |
4905 | found = true; | |
4906 | } | |
2c9561b5 MJ |
4907 | break; |
4908 | } | |
4909 | } | |
4910 | if (!found) | |
4911 | item->value = NULL_TREE; | |
4912 | } | |
4913 | } | |
4914 | ||
7e9f2b6e MJ |
4915 | /* Intersect values in INTER with aggregate values that come along edge CS to |
4916 | parameter number INDEX and return it. If INTER does not actually exist yet, | |
4917 | copy all incoming values to it. If we determine we ended up with no values | |
4918 | whatsoever, return a released vector. */ | |
4919 | ||
eb270950 | 4920 | static vec<ipa_agg_value> |
7e9f2b6e | 4921 | intersect_aggregates_with_edge (struct cgraph_edge *cs, int index, |
eb270950 | 4922 | vec<ipa_agg_value> inter) |
7e9f2b6e MJ |
4923 | { |
4924 | struct ipa_jump_func *jfunc; | |
4925 | jfunc = ipa_get_ith_jump_func (IPA_EDGE_REF (cs), index); | |
4926 | if (jfunc->type == IPA_JF_PASS_THROUGH | |
4927 | && ipa_get_jf_pass_through_operation (jfunc) == NOP_EXPR) | |
4928 | { | |
99b1c316 | 4929 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
7e9f2b6e MJ |
4930 | int src_idx = ipa_get_jf_pass_through_formal_id (jfunc); |
4931 | ||
4932 | if (caller_info->ipcp_orig_node) | |
4933 | { | |
4934 | struct cgraph_node *orig_node = caller_info->ipcp_orig_node; | |
99b1c316 | 4935 | class ipcp_param_lattices *orig_plats; |
7e9f2b6e MJ |
4936 | orig_plats = ipa_get_parm_lattices (IPA_NODE_REF (orig_node), |
4937 | src_idx); | |
4938 | if (agg_pass_through_permissible_p (orig_plats, jfunc)) | |
4939 | { | |
4940 | if (!inter.exists ()) | |
0fd44da3 | 4941 | inter = agg_replacements_to_vector (cs->caller, src_idx, 0); |
7e9f2b6e MJ |
4942 | else |
4943 | intersect_with_agg_replacements (cs->caller, src_idx, | |
4944 | &inter, 0); | |
4945 | } | |
c8f40352 MJ |
4946 | else |
4947 | { | |
4948 | inter.release (); | |
4949 | return vNULL; | |
4950 | } | |
7e9f2b6e MJ |
4951 | } |
4952 | else | |
4953 | { | |
99b1c316 | 4954 | class ipcp_param_lattices *src_plats; |
7e9f2b6e MJ |
4955 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); |
4956 | if (agg_pass_through_permissible_p (src_plats, jfunc)) | |
4957 | { | |
4958 | /* Currently we do not produce clobber aggregate jump | |
4959 | functions, adjust when we do. */ | |
4960 | gcc_checking_assert (!jfunc->agg.items); | |
4961 | if (!inter.exists ()) | |
4962 | inter = copy_plats_to_inter (src_plats, 0); | |
4963 | else | |
4964 | intersect_with_plats (src_plats, &inter, 0); | |
4965 | } | |
c8f40352 MJ |
4966 | else |
4967 | { | |
4968 | inter.release (); | |
4969 | return vNULL; | |
4970 | } | |
7e9f2b6e MJ |
4971 | } |
4972 | } | |
4973 | else if (jfunc->type == IPA_JF_ANCESTOR | |
4974 | && ipa_get_jf_ancestor_agg_preserved (jfunc)) | |
4975 | { | |
99b1c316 | 4976 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
7e9f2b6e | 4977 | int src_idx = ipa_get_jf_ancestor_formal_id (jfunc); |
99b1c316 | 4978 | class ipcp_param_lattices *src_plats; |
7e9f2b6e MJ |
4979 | HOST_WIDE_INT delta = ipa_get_jf_ancestor_offset (jfunc); |
4980 | ||
4981 | if (caller_info->ipcp_orig_node) | |
4982 | { | |
4983 | if (!inter.exists ()) | |
0fd44da3 | 4984 | inter = agg_replacements_to_vector (cs->caller, src_idx, delta); |
7e9f2b6e | 4985 | else |
0fd44da3 | 4986 | intersect_with_agg_replacements (cs->caller, src_idx, &inter, |
7e9f2b6e MJ |
4987 | delta); |
4988 | } | |
4989 | else | |
4990 | { | |
5de73c05 | 4991 | src_plats = ipa_get_parm_lattices (caller_info, src_idx); |
7e9f2b6e MJ |
4992 | /* Currently we do not produce clobber aggregate jump |
4993 | functions, adjust when we do. */ | |
4994 | gcc_checking_assert (!src_plats->aggs || !jfunc->agg.items); | |
4995 | if (!inter.exists ()) | |
4996 | inter = copy_plats_to_inter (src_plats, delta); | |
4997 | else | |
4998 | intersect_with_plats (src_plats, &inter, delta); | |
4999 | } | |
5000 | } | |
5001 | else if (jfunc->agg.items) | |
5002 | { | |
eb270950 FX |
5003 | class ipa_node_params *caller_info = IPA_NODE_REF (cs->caller); |
5004 | struct ipa_agg_value *item; | |
7e9f2b6e MJ |
5005 | int k; |
5006 | ||
5007 | if (!inter.exists ()) | |
5008 | for (unsigned i = 0; i < jfunc->agg.items->length (); i++) | |
eb270950 FX |
5009 | { |
5010 | struct ipa_agg_jf_item *agg_item = &(*jfunc->agg.items)[i]; | |
951e27f5 FX |
5011 | struct ipa_agg_value agg_value; |
5012 | ||
5013 | if (self_recursive_agg_pass_through_p (cs, agg_item, index)) | |
eb270950 | 5014 | { |
951e27f5 FX |
5015 | /* For a self-recursive call, if aggregate jump function is a |
5016 | simple pass-through, the exact value that it stands for is | |
5017 | not known at this point, which must comes from other call | |
5018 | sites. But we still need to add a place holder in value | |
5019 | sets to indicate it, here we use error_mark_node to | |
5020 | represent the special unknown value, which will be replaced | |
5021 | with real one during later intersecting operations. */ | |
5022 | agg_value.value = error_mark_node; | |
5023 | } | |
5024 | else | |
5025 | { | |
5026 | tree value = ipa_agg_value_from_node (caller_info, cs->caller, | |
5027 | agg_item); | |
5028 | if (!value) | |
5029 | continue; | |
eb270950 | 5030 | |
eb270950 | 5031 | agg_value.value = value; |
eb270950 | 5032 | } |
951e27f5 FX |
5033 | |
5034 | agg_value.offset = agg_item->offset; | |
5035 | inter.safe_push (agg_value); | |
eb270950 | 5036 | } |
7e9f2b6e MJ |
5037 | else |
5038 | FOR_EACH_VEC_ELT (inter, k, item) | |
5039 | { | |
5040 | int l = 0; | |
5de73c05 | 5041 | bool found = false; |
7e9f2b6e MJ |
5042 | |
5043 | if (!item->value) | |
5044 | continue; | |
5045 | ||
5046 | while ((unsigned) l < jfunc->agg.items->length ()) | |
5047 | { | |
5048 | struct ipa_agg_jf_item *ti; | |
5049 | ti = &(*jfunc->agg.items)[l]; | |
5050 | if (ti->offset > item->offset) | |
5051 | break; | |
5052 | if (ti->offset == item->offset) | |
5053 | { | |
951e27f5 FX |
5054 | tree value; |
5055 | ||
5056 | if (self_recursive_agg_pass_through_p (cs, ti, index)) | |
5057 | { | |
5058 | /* A simple aggregate pass-through in self-recursive | |
5059 | call should lead to same value. */ | |
5060 | found = true; | |
5061 | } | |
5062 | else if ((value = ipa_agg_value_from_node (caller_info, | |
5063 | cs->caller, ti))) | |
5064 | { | |
5065 | if (values_equal_for_ipcp_p (item->value, value)) | |
5066 | found = true; | |
5067 | else if (item->value == error_mark_node) | |
5068 | { | |
5069 | /* Replace unknown place holder value with real | |
5070 | one. */ | |
5071 | item->value = value; | |
5072 | found = true; | |
5073 | } | |
5074 | } | |
7e9f2b6e MJ |
5075 | break; |
5076 | } | |
5077 | l++; | |
5078 | } | |
5079 | if (!found) | |
5080 | item->value = NULL; | |
5081 | } | |
5082 | } | |
5083 | else | |
5084 | { | |
c3284718 | 5085 | inter.release (); |
eb270950 | 5086 | return vNULL; |
7e9f2b6e MJ |
5087 | } |
5088 | return inter; | |
5089 | } | |
5090 | ||
2c9561b5 MJ |
5091 | /* Look at edges in CALLERS and collect all known aggregate values that arrive |
5092 | from all of them. */ | |
5093 | ||
5094 | static struct ipa_agg_replacement_value * | |
5095 | find_aggregate_values_for_callers_subset (struct cgraph_node *node, | |
d52f5295 | 5096 | vec<cgraph_edge *> callers) |
2c9561b5 | 5097 | { |
99b1c316 | 5098 | class ipa_node_params *dest_info = IPA_NODE_REF (node); |
6f9549ee MJ |
5099 | struct ipa_agg_replacement_value *res; |
5100 | struct ipa_agg_replacement_value **tail = &res; | |
2c9561b5 | 5101 | struct cgraph_edge *cs; |
dffdd6e5 | 5102 | int i, j, count = ipa_get_param_count (dest_info); |
2c9561b5 | 5103 | |
9771b263 | 5104 | FOR_EACH_VEC_ELT (callers, j, cs) |
2c9561b5 | 5105 | { |
a33c028e JH |
5106 | if (!IPA_EDGE_REF (cs)) |
5107 | { | |
5108 | count = 0; | |
5109 | break; | |
5110 | } | |
2c9561b5 MJ |
5111 | int c = ipa_get_cs_argument_count (IPA_EDGE_REF (cs)); |
5112 | if (c < count) | |
5113 | count = c; | |
5114 | } | |
5115 | ||
155c9907 | 5116 | for (i = 0; i < count; i++) |
2c9561b5 MJ |
5117 | { |
5118 | struct cgraph_edge *cs; | |
eb270950 FX |
5119 | vec<ipa_agg_value> inter = vNULL; |
5120 | struct ipa_agg_value *item; | |
99b1c316 | 5121 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (dest_info, i); |
2c9561b5 MJ |
5122 | int j; |
5123 | ||
5124 | /* Among other things, the following check should deal with all by_ref | |
5125 | mismatches. */ | |
7b920a9a | 5126 | if (plats->aggs_bottom) |
2c9561b5 MJ |
5127 | continue; |
5128 | ||
9771b263 | 5129 | FOR_EACH_VEC_ELT (callers, j, cs) |
2c9561b5 | 5130 | { |
7b668576 MJ |
5131 | struct ipa_jump_func *jfunc |
5132 | = ipa_get_ith_jump_func (IPA_EDGE_REF (cs), i); | |
cf254442 MJ |
5133 | if (self_recursive_pass_through_p (cs, jfunc, i) |
5134 | && (!plats->aggs_by_ref | |
5135 | || ipa_get_jf_pass_through_agg_preserved (jfunc))) | |
7b668576 | 5136 | continue; |
7e9f2b6e | 5137 | inter = intersect_aggregates_with_edge (cs, i, inter); |
2c9561b5 | 5138 | |
9771b263 | 5139 | if (!inter.exists ()) |
2c9561b5 MJ |
5140 | goto next_param; |
5141 | } | |
5142 | ||
9771b263 | 5143 | FOR_EACH_VEC_ELT (inter, j, item) |
2c9561b5 MJ |
5144 | { |
5145 | struct ipa_agg_replacement_value *v; | |
5146 | ||
5147 | if (!item->value) | |
5148 | continue; | |
5149 | ||
951e27f5 FX |
5150 | /* All values must be real values, not unknown place holders. */ |
5151 | gcc_assert (item->value != error_mark_node); | |
5152 | ||
766090c2 | 5153 | v = ggc_alloc<ipa_agg_replacement_value> (); |
2c9561b5 MJ |
5154 | v->index = i; |
5155 | v->offset = item->offset; | |
5156 | v->value = item->value; | |
7b920a9a | 5157 | v->by_ref = plats->aggs_by_ref; |
6f9549ee MJ |
5158 | *tail = v; |
5159 | tail = &v->next; | |
2c9561b5 MJ |
5160 | } |
5161 | ||
5162 | next_param: | |
9771b263 DN |
5163 | if (inter.exists ()) |
5164 | inter.release (); | |
2c9561b5 | 5165 | } |
6f9549ee | 5166 | *tail = NULL; |
2c9561b5 MJ |
5167 | return res; |
5168 | } | |
5169 | ||
2c9561b5 MJ |
5170 | /* Determine whether CS also brings all scalar values that the NODE is |
5171 | specialized for. */ | |
5172 | ||
5173 | static bool | |
5174 | cgraph_edge_brings_all_scalars_for_node (struct cgraph_edge *cs, | |
5175 | struct cgraph_node *node) | |
5176 | { | |
99b1c316 | 5177 | class ipa_node_params *dest_info = IPA_NODE_REF (node); |
2c9561b5 | 5178 | int count = ipa_get_param_count (dest_info); |
99b1c316 MS |
5179 | class ipa_node_params *caller_info; |
5180 | class ipa_edge_args *args; | |
2c9561b5 MJ |
5181 | int i; |
5182 | ||
5183 | caller_info = IPA_NODE_REF (cs->caller); | |
5184 | args = IPA_EDGE_REF (cs); | |
5185 | for (i = 0; i < count; i++) | |
5186 | { | |
5187 | struct ipa_jump_func *jump_func; | |
5188 | tree val, t; | |
5189 | ||
44210a96 | 5190 | val = dest_info->known_csts[i]; |
2c9561b5 MJ |
5191 | if (!val) |
5192 | continue; | |
5193 | ||
5194 | if (i >= ipa_get_cs_argument_count (args)) | |
5195 | return false; | |
5196 | jump_func = ipa_get_ith_jump_func (args, i); | |
e5cf5e11 PK |
5197 | t = ipa_value_from_jfunc (caller_info, jump_func, |
5198 | ipa_get_type (dest_info, i)); | |
2c9561b5 MJ |
5199 | if (!t || !values_equal_for_ipcp_p (val, t)) |
5200 | return false; | |
5201 | } | |
5202 | return true; | |
5203 | } | |
5204 | ||
5205 | /* Determine whether CS also brings all aggregate values that NODE is | |
5206 | specialized for. */ | |
5207 | static bool | |
5208 | cgraph_edge_brings_all_agg_vals_for_node (struct cgraph_edge *cs, | |
5209 | struct cgraph_node *node) | |
5210 | { | |
99b1c316 | 5211 | class ipa_node_params *orig_node_info; |
2c9561b5 | 5212 | struct ipa_agg_replacement_value *aggval; |
7e9f2b6e | 5213 | int i, ec, count; |
2c9561b5 MJ |
5214 | |
5215 | aggval = ipa_get_agg_replacements_for_node (node); | |
7e9f2b6e MJ |
5216 | if (!aggval) |
5217 | return true; | |
5218 | ||
5219 | count = ipa_get_param_count (IPA_NODE_REF (node)); | |
5220 | ec = ipa_get_cs_argument_count (IPA_EDGE_REF (cs)); | |
5221 | if (ec < count) | |
5222 | for (struct ipa_agg_replacement_value *av = aggval; av; av = av->next) | |
5223 | if (aggval->index >= ec) | |
5224 | return false; | |
5225 | ||
9576e7b1 | 5226 | orig_node_info = IPA_NODE_REF (IPA_NODE_REF (node)->ipcp_orig_node); |
7e9f2b6e MJ |
5227 | |
5228 | for (i = 0; i < count; i++) | |
2c9561b5 | 5229 | { |
99b1c316 | 5230 | class ipcp_param_lattices *plats; |
7e9f2b6e MJ |
5231 | bool interesting = false; |
5232 | for (struct ipa_agg_replacement_value *av = aggval; av; av = av->next) | |
5233 | if (aggval->index == i) | |
5234 | { | |
5235 | interesting = true; | |
5236 | break; | |
5237 | } | |
5238 | if (!interesting) | |
5239 | continue; | |
5240 | ||
9576e7b1 | 5241 | plats = ipa_get_parm_lattices (orig_node_info, aggval->index); |
7e9f2b6e | 5242 | if (plats->aggs_bottom) |
2c9561b5 | 5243 | return false; |
2c9561b5 | 5244 | |
8bda7ce8 | 5245 | vec<ipa_agg_value> values = intersect_aggregates_with_edge (cs, i, vNULL); |
c3284718 | 5246 | if (!values.exists ()) |
2c9561b5 MJ |
5247 | return false; |
5248 | ||
7e9f2b6e MJ |
5249 | for (struct ipa_agg_replacement_value *av = aggval; av; av = av->next) |
5250 | if (aggval->index == i) | |
5251 | { | |
eb270950 | 5252 | struct ipa_agg_value *item; |
7e9f2b6e MJ |
5253 | int j; |
5254 | bool found = false; | |
5255 | FOR_EACH_VEC_ELT (values, j, item) | |
5256 | if (item->value | |
5257 | && item->offset == av->offset | |
5258 | && values_equal_for_ipcp_p (item->value, av->value)) | |
c3272a92 PCC |
5259 | { |
5260 | found = true; | |
5261 | break; | |
5262 | } | |
7e9f2b6e MJ |
5263 | if (!found) |
5264 | { | |
c3284718 | 5265 | values.release (); |
7e9f2b6e MJ |
5266 | return false; |
5267 | } | |
5268 | } | |
8bda7ce8 | 5269 | values.release (); |
2c9561b5 MJ |
5270 | } |
5271 | return true; | |
5272 | } | |
5273 | ||
310bc633 MJ |
5274 | /* Given an original NODE and a VAL for which we have already created a |
5275 | specialized clone, look whether there are incoming edges that still lead | |
5276 | into the old node but now also bring the requested value and also conform to | |
026c3cfd | 5277 | all other criteria such that they can be redirected the special node. |
310bc633 | 5278 | This function can therefore redirect the final edge in a SCC. */ |
3e66255c | 5279 | |
c0cb5055 | 5280 | template <typename valtype> |
3e66255c | 5281 | static void |
c0cb5055 | 5282 | perhaps_add_new_callers (cgraph_node *node, ipcp_value<valtype> *val) |
3e66255c | 5283 | { |
c0cb5055 | 5284 | ipcp_value_source<valtype> *src; |
3995f3a2 | 5285 | profile_count redirected_sum = profile_count::zero (); |
3e66255c | 5286 | |
310bc633 | 5287 | for (src = val->sources; src; src = src->next) |
3e66255c | 5288 | { |
310bc633 MJ |
5289 | struct cgraph_edge *cs = src->cs; |
5290 | while (cs) | |
5291 | { | |
7b668576 | 5292 | if (cgraph_edge_brings_value_p (cs, src, node, val) |
47f4756e MJ |
5293 | && cgraph_edge_brings_all_scalars_for_node (cs, val->spec_node) |
5294 | && cgraph_edge_brings_all_agg_vals_for_node (cs, val->spec_node)) | |
310bc633 | 5295 | { |
47f4756e | 5296 | if (dump_file) |
464d0118 ML |
5297 | fprintf (dump_file, " - adding an extra caller %s of %s\n", |
5298 | cs->caller->dump_name (), | |
5299 | val->spec_node->dump_name ()); | |
47f4756e | 5300 | |
6a4bad95 MJ |
5301 | cs->redirect_callee_duplicating_thunks (val->spec_node); |
5302 | val->spec_node->expand_all_artificial_thunks (); | |
1bad9c18 JH |
5303 | if (cs->count.ipa ().initialized_p ()) |
5304 | redirected_sum = redirected_sum + cs->count.ipa (); | |
310bc633 MJ |
5305 | } |
5306 | cs = get_next_cgraph_edge_clone (cs); | |
5307 | } | |
3e66255c | 5308 | } |
310bc633 | 5309 | |
e3951b03 | 5310 | if (redirected_sum.nonzero_p ()) |
310bc633 | 5311 | update_specialized_profile (val->spec_node, node, redirected_sum); |
3e66255c MJ |
5312 | } |
5313 | ||
44210a96 | 5314 | /* Return true if KNOWN_CONTEXTS contain at least one useful context. */ |
3e66255c | 5315 | |
44210a96 MJ |
5316 | static bool |
5317 | known_contexts_useful_p (vec<ipa_polymorphic_call_context> known_contexts) | |
5318 | { | |
5319 | ipa_polymorphic_call_context *ctx; | |
5320 | int i; | |
5321 | ||
5322 | FOR_EACH_VEC_ELT (known_contexts, i, ctx) | |
5323 | if (!ctx->useless_p ()) | |
5324 | return true; | |
5325 | return false; | |
5326 | } | |
5327 | ||
5328 | /* Return a copy of KNOWN_CSTS if it is not empty, otherwise return vNULL. */ | |
5329 | ||
5330 | static vec<ipa_polymorphic_call_context> | |
5331 | copy_useful_known_contexts (vec<ipa_polymorphic_call_context> known_contexts) | |
5332 | { | |
5333 | if (known_contexts_useful_p (known_contexts)) | |
5334 | return known_contexts.copy (); | |
5335 | else | |
5336 | return vNULL; | |
5337 | } | |
5338 | ||
5339 | /* Copy KNOWN_CSTS and modify the copy according to VAL and INDEX. If | |
5340 | non-empty, replace KNOWN_CONTEXTS with its copy too. */ | |
310bc633 | 5341 | |
518dc859 | 5342 | static void |
44210a96 MJ |
5343 | modify_known_vectors_with_val (vec<tree> *known_csts, |
5344 | vec<ipa_polymorphic_call_context> *known_contexts, | |
5345 | ipcp_value<tree> *val, | |
5346 | int index) | |
518dc859 | 5347 | { |
44210a96 MJ |
5348 | *known_csts = known_csts->copy (); |
5349 | *known_contexts = copy_useful_known_contexts (*known_contexts); | |
5350 | (*known_csts)[index] = val->value; | |
5351 | } | |
518dc859 | 5352 | |
44210a96 MJ |
5353 | /* Replace KNOWN_CSTS with its copy. Also copy KNOWN_CONTEXTS and modify the |
5354 | copy according to VAL and INDEX. */ | |
5355 | ||
5356 | static void | |
5357 | modify_known_vectors_with_val (vec<tree> *known_csts, | |
5358 | vec<ipa_polymorphic_call_context> *known_contexts, | |
5359 | ipcp_value<ipa_polymorphic_call_context> *val, | |
5360 | int index) | |
5361 | { | |
5362 | *known_csts = known_csts->copy (); | |
5363 | *known_contexts = known_contexts->copy (); | |
5364 | (*known_contexts)[index] = val->value; | |
310bc633 | 5365 | } |
5e45130d | 5366 | |
44210a96 MJ |
5367 | /* Return true if OFFSET indicates this was not an aggregate value or there is |
5368 | a replacement equivalent to VALUE, INDEX and OFFSET among those in the | |
5369 | AGGVALS list. */ | |
2c9561b5 MJ |
5370 | |
5371 | DEBUG_FUNCTION bool | |
44210a96 MJ |
5372 | ipcp_val_agg_replacement_ok_p (ipa_agg_replacement_value *aggvals, |
5373 | int index, HOST_WIDE_INT offset, tree value) | |
2c9561b5 | 5374 | { |
44210a96 MJ |
5375 | if (offset == -1) |
5376 | return true; | |
5377 | ||
2c9561b5 MJ |
5378 | while (aggvals) |
5379 | { | |
5380 | if (aggvals->index == index | |
5381 | && aggvals->offset == offset | |
5382 | && values_equal_for_ipcp_p (aggvals->value, value)) | |
5383 | return true; | |
5384 | aggvals = aggvals->next; | |
5385 | } | |
5386 | return false; | |
5387 | } | |
5388 | ||
f25ae20e | 5389 | /* Return true if offset is minus one because source of a polymorphic context |
44210a96 MJ |
5390 | cannot be an aggregate value. */ |
5391 | ||
5392 | DEBUG_FUNCTION bool | |
5393 | ipcp_val_agg_replacement_ok_p (ipa_agg_replacement_value *, | |
5394 | int , HOST_WIDE_INT offset, | |
5395 | ipa_polymorphic_call_context) | |
5396 | { | |
5397 | return offset == -1; | |
5398 | } | |
5399 | ||
f25ae20e | 5400 | /* Decide whether to create a special version of NODE for value VAL of parameter |
2c9561b5 MJ |
5401 | at the given INDEX. If OFFSET is -1, the value is for the parameter itself, |
5402 | otherwise it is stored at the given OFFSET of the parameter. KNOWN_CSTS, | |
44210a96 | 5403 | KNOWN_CONTEXTS and KNOWN_AGGS describe the other already known values. */ |
2c9561b5 | 5404 | |
c0cb5055 | 5405 | template <typename valtype> |
2c9561b5 MJ |
5406 | static bool |
5407 | decide_about_value (struct cgraph_node *node, int index, HOST_WIDE_INT offset, | |
c0cb5055 | 5408 | ipcp_value<valtype> *val, vec<tree> known_csts, |
44210a96 | 5409 | vec<ipa_polymorphic_call_context> known_contexts) |
2c9561b5 MJ |
5410 | { |
5411 | struct ipa_agg_replacement_value *aggvals; | |
5412 | int freq_sum, caller_count; | |
3995f3a2 | 5413 | profile_count count_sum; |
d52f5295 | 5414 | vec<cgraph_edge *> callers; |
2c9561b5 MJ |
5415 | |
5416 | if (val->spec_node) | |
5417 | { | |
5418 | perhaps_add_new_callers (node, val); | |
5419 | return false; | |
5420 | } | |
f7725a48 | 5421 | else if (val->local_size_cost + overall_size > get_max_overall_size (node)) |
2c9561b5 MJ |
5422 | { |
5423 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5424 | fprintf (dump_file, " Ignoring candidate value because " | |
f7725a48 | 5425 | "maximum unit size would be reached with %li.\n", |
2c9561b5 MJ |
5426 | val->local_size_cost + overall_size); |
5427 | return false; | |
5428 | } | |
47f4756e | 5429 | else if (!get_info_about_necessary_edges (val, node, &freq_sum, &count_sum, |
2c9561b5 MJ |
5430 | &caller_count)) |
5431 | return false; | |
5432 | ||
5433 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5434 | { | |
5435 | fprintf (dump_file, " - considering value "); | |
5436 | print_ipcp_constant_value (dump_file, val->value); | |
0e8853ee JH |
5437 | fprintf (dump_file, " for "); |
5438 | ipa_dump_param (dump_file, IPA_NODE_REF (node), index); | |
2c9561b5 MJ |
5439 | if (offset != -1) |
5440 | fprintf (dump_file, ", offset: " HOST_WIDE_INT_PRINT_DEC, offset); | |
5441 | fprintf (dump_file, " (caller_count: %i)\n", caller_count); | |
5442 | } | |
5443 | ||
5444 | if (!good_cloning_opportunity_p (node, val->local_time_benefit, | |
5445 | freq_sum, count_sum, | |
5446 | val->local_size_cost) | |
5447 | && !good_cloning_opportunity_p (node, | |
5448 | val->local_time_benefit | |
5449 | + val->prop_time_benefit, | |
5450 | freq_sum, count_sum, | |
5451 | val->local_size_cost | |
5452 | + val->prop_size_cost)) | |
5453 | return false; | |
5454 | ||
5455 | if (dump_file) | |
464d0118 ML |
5456 | fprintf (dump_file, " Creating a specialized node of %s.\n", |
5457 | node->dump_name ()); | |
2c9561b5 | 5458 | |
47f4756e | 5459 | callers = gather_edges_for_value (val, node, caller_count); |
2c9561b5 | 5460 | if (offset == -1) |
44210a96 MJ |
5461 | modify_known_vectors_with_val (&known_csts, &known_contexts, val, index); |
5462 | else | |
5463 | { | |
5464 | known_csts = known_csts.copy (); | |
5465 | known_contexts = copy_useful_known_contexts (known_contexts); | |
5466 | } | |
5467 | find_more_scalar_values_for_callers_subset (node, known_csts, callers); | |
5468 | find_more_contexts_for_caller_subset (node, &known_contexts, callers); | |
2c9561b5 | 5469 | aggvals = find_aggregate_values_for_callers_subset (node, callers); |
44210a96 MJ |
5470 | gcc_checking_assert (ipcp_val_agg_replacement_ok_p (aggvals, index, |
5471 | offset, val->value)); | |
5472 | val->spec_node = create_specialized_node (node, known_csts, known_contexts, | |
5473 | aggvals, callers); | |
2c9561b5 MJ |
5474 | overall_size += val->local_size_cost; |
5475 | ||
5476 | /* TODO: If for some lattice there is only one other known value | |
5477 | left, make a special node for it too. */ | |
5478 | ||
5479 | return true; | |
5480 | } | |
5e45130d | 5481 | |
310bc633 | 5482 | /* Decide whether and what specialized clones of NODE should be created. */ |
5e45130d | 5483 | |
310bc633 MJ |
5484 | static bool |
5485 | decide_whether_version_node (struct cgraph_node *node) | |
5486 | { | |
99b1c316 | 5487 | class ipa_node_params *info = IPA_NODE_REF (node); |
310bc633 | 5488 | int i, count = ipa_get_param_count (info); |
44210a96 MJ |
5489 | vec<tree> known_csts; |
5490 | vec<ipa_polymorphic_call_context> known_contexts; | |
310bc633 | 5491 | bool ret = false; |
5e45130d | 5492 | |
310bc633 MJ |
5493 | if (count == 0) |
5494 | return false; | |
5e45130d | 5495 | |
310bc633 | 5496 | if (dump_file && (dump_flags & TDF_DETAILS)) |
464d0118 ML |
5497 | fprintf (dump_file, "\nEvaluating opportunities for %s.\n", |
5498 | node->dump_name ()); | |
5e45130d | 5499 | |
44210a96 | 5500 | gather_context_independent_values (info, &known_csts, &known_contexts, |
eb270950 | 5501 | NULL, NULL); |
5e45130d | 5502 | |
155c9907 | 5503 | for (i = 0; i < count;i++) |
310bc633 | 5504 | { |
99b1c316 | 5505 | class ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); |
c0cb5055 | 5506 | ipcp_lattice<tree> *lat = &plats->itself; |
44210a96 | 5507 | ipcp_lattice<ipa_polymorphic_call_context> *ctxlat = &plats->ctxlat; |
5e45130d | 5508 | |
2c9561b5 | 5509 | if (!lat->bottom |
44210a96 MJ |
5510 | && !known_csts[i]) |
5511 | { | |
5512 | ipcp_value<tree> *val; | |
5513 | for (val = lat->values; val; val = val->next) | |
5514 | ret |= decide_about_value (node, i, -1, val, known_csts, | |
5515 | known_contexts); | |
5516 | } | |
61e03ffc | 5517 | |
eb20b778 | 5518 | if (!plats->aggs_bottom) |
518dc859 | 5519 | { |
2c9561b5 | 5520 | struct ipcp_agg_lattice *aglat; |
c0cb5055 | 5521 | ipcp_value<tree> *val; |
2c9561b5 MJ |
5522 | for (aglat = plats->aggs; aglat; aglat = aglat->next) |
5523 | if (!aglat->bottom && aglat->values | |
5524 | /* If the following is false, the one value is in | |
5525 | known_aggs. */ | |
5526 | && (plats->aggs_contain_variable | |
c0cb5055 | 5527 | || !aglat->is_single_const ())) |
2c9561b5 MJ |
5528 | for (val = aglat->values; val; val = val->next) |
5529 | ret |= decide_about_value (node, i, aglat->offset, val, | |
44210a96 | 5530 | known_csts, known_contexts); |
cc58ceee | 5531 | } |
44210a96 MJ |
5532 | |
5533 | if (!ctxlat->bottom | |
5534 | && known_contexts[i].useless_p ()) | |
5535 | { | |
5536 | ipcp_value<ipa_polymorphic_call_context> *val; | |
5537 | for (val = ctxlat->values; val; val = val->next) | |
5538 | ret |= decide_about_value (node, i, -1, val, known_csts, | |
5539 | known_contexts); | |
5540 | } | |
5541 | ||
155c9907 | 5542 | info = IPA_NODE_REF (node); |
310bc633 | 5543 | } |
cc58ceee | 5544 | |
eb20b778 | 5545 | if (info->do_clone_for_all_contexts) |
310bc633 | 5546 | { |
eb20b778 | 5547 | struct cgraph_node *clone; |
d52f5295 | 5548 | vec<cgraph_edge *> callers; |
cc58ceee | 5549 | |
310bc633 | 5550 | if (dump_file) |
464d0118 ML |
5551 | fprintf (dump_file, " - Creating a specialized node of %s " |
5552 | "for all known contexts.\n", node->dump_name ()); | |
5e45130d | 5553 | |
d52f5295 | 5554 | callers = node->collect_callers (); |
7b668576 MJ |
5555 | find_more_scalar_values_for_callers_subset (node, known_csts, callers); |
5556 | find_more_contexts_for_caller_subset (node, &known_contexts, callers); | |
5557 | ipa_agg_replacement_value *aggvals | |
5558 | = find_aggregate_values_for_callers_subset (node, callers); | |
44210a96 MJ |
5559 | |
5560 | if (!known_contexts_useful_p (known_contexts)) | |
5561 | { | |
5562 | known_contexts.release (); | |
5563 | known_contexts = vNULL; | |
5564 | } | |
5565 | clone = create_specialized_node (node, known_csts, known_contexts, | |
7b668576 | 5566 | aggvals, callers); |
310bc633 | 5567 | info = IPA_NODE_REF (node); |
eb20b778 MJ |
5568 | info->do_clone_for_all_contexts = false; |
5569 | IPA_NODE_REF (clone)->is_all_contexts_clone = true; | |
310bc633 MJ |
5570 | ret = true; |
5571 | } | |
5572 | else | |
44210a96 MJ |
5573 | { |
5574 | known_csts.release (); | |
5575 | known_contexts.release (); | |
5576 | } | |
5e45130d | 5577 | |
310bc633 MJ |
5578 | return ret; |
5579 | } | |
9187e02d | 5580 | |
310bc633 | 5581 | /* Transitively mark all callees of NODE within the same SCC as not dead. */ |
3949c4a7 | 5582 | |
310bc633 MJ |
5583 | static void |
5584 | spread_undeadness (struct cgraph_node *node) | |
5585 | { | |
5586 | struct cgraph_edge *cs; | |
5e45130d | 5587 | |
310bc633 | 5588 | for (cs = node->callees; cs; cs = cs->next_callee) |
4cb13597 | 5589 | if (ipa_edge_within_scc (cs)) |
310bc633 MJ |
5590 | { |
5591 | struct cgraph_node *callee; | |
99b1c316 | 5592 | class ipa_node_params *info; |
129a37fc | 5593 | |
d52f5295 | 5594 | callee = cs->callee->function_symbol (NULL); |
310bc633 | 5595 | info = IPA_NODE_REF (callee); |
5e45130d | 5596 | |
3c4fa8a8 | 5597 | if (info && info->node_dead) |
310bc633 MJ |
5598 | { |
5599 | info->node_dead = 0; | |
5600 | spread_undeadness (callee); | |
5601 | } | |
5602 | } | |
5603 | } | |
5604 | ||
5605 | /* Return true if NODE has a caller from outside of its SCC that is not | |
5606 | dead. Worker callback for cgraph_for_node_and_aliases. */ | |
5607 | ||
5608 | static bool | |
5609 | has_undead_caller_from_outside_scc_p (struct cgraph_node *node, | |
155c9907 | 5610 | void *data ATTRIBUTE_UNUSED) |
310bc633 MJ |
5611 | { |
5612 | struct cgraph_edge *cs; | |
5613 | ||
5614 | for (cs = node->callers; cs; cs = cs->next_caller) | |
5615 | if (cs->caller->thunk.thunk_p | |
d52f5295 ML |
5616 | && cs->caller->call_for_symbol_thunks_and_aliases |
5617 | (has_undead_caller_from_outside_scc_p, NULL, true)) | |
310bc633 | 5618 | return true; |
4cb13597 | 5619 | else if (!ipa_edge_within_scc (cs) |
310bc633 MJ |
5620 | && !IPA_NODE_REF (cs->caller)->node_dead) |
5621 | return true; | |
5622 | return false; | |
5623 | } | |
5624 | ||
5625 | ||
5626 | /* Identify nodes within the same SCC as NODE which are no longer needed | |
5627 | because of new clones and will be removed as unreachable. */ | |
5628 | ||
5629 | static void | |
5630 | identify_dead_nodes (struct cgraph_node *node) | |
5631 | { | |
5632 | struct cgraph_node *v; | |
155c9907 | 5633 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
87f94429 | 5634 | if (v->local |
3c4fa8a8 | 5635 | && IPA_NODE_REF (v) |
d52f5295 ML |
5636 | && !v->call_for_symbol_thunks_and_aliases |
5637 | (has_undead_caller_from_outside_scc_p, NULL, true)) | |
310bc633 MJ |
5638 | IPA_NODE_REF (v)->node_dead = 1; |
5639 | ||
155c9907 | 5640 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
3c4fa8a8 | 5641 | if (IPA_NODE_REF (v) && !IPA_NODE_REF (v)->node_dead) |
310bc633 MJ |
5642 | spread_undeadness (v); |
5643 | ||
5644 | if (dump_file && (dump_flags & TDF_DETAILS)) | |
5645 | { | |
155c9907 | 5646 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
3c4fa8a8 | 5647 | if (IPA_NODE_REF (v) && IPA_NODE_REF (v)->node_dead) |
464d0118 | 5648 | fprintf (dump_file, " Marking node as dead: %s.\n", v->dump_name ()); |
5e45130d | 5649 | } |
310bc633 MJ |
5650 | } |
5651 | ||
5652 | /* The decision stage. Iterate over the topological order of call graph nodes | |
5653 | TOPO and make specialized clones if deemed beneficial. */ | |
5654 | ||
5655 | static void | |
99b1c316 | 5656 | ipcp_decision_stage (class ipa_topo_info *topo) |
310bc633 MJ |
5657 | { |
5658 | int i; | |
5659 | ||
5660 | if (dump_file) | |
5661 | fprintf (dump_file, "\nIPA decision stage:\n\n"); | |
5e45130d | 5662 | |
310bc633 | 5663 | for (i = topo->nnodes - 1; i >= 0; i--) |
5e45130d | 5664 | { |
310bc633 MJ |
5665 | struct cgraph_node *node = topo->order[i]; |
5666 | bool change = false, iterate = true; | |
5667 | ||
5668 | while (iterate) | |
5669 | { | |
5670 | struct cgraph_node *v; | |
5671 | iterate = false; | |
155c9907 | 5672 | for (v = node; v; v = ((struct ipa_dfs_info *) v->aux)->next_cycle) |
d52f5295 | 5673 | if (v->has_gimple_body_p () |
310bc633 MJ |
5674 | && ipcp_versionable_function_p (v)) |
5675 | iterate |= decide_whether_version_node (v); | |
5676 | ||
5677 | change |= iterate; | |
5678 | } | |
5679 | if (change) | |
5680 | identify_dead_nodes (node); | |
518dc859 | 5681 | } |
518dc859 RL |
5682 | } |
5683 | ||
209ca542 PK |
5684 | /* Look up all the bits information that we have discovered and copy it over |
5685 | to the transformation summary. */ | |
5686 | ||
5687 | static void | |
5688 | ipcp_store_bits_results (void) | |
5689 | { | |
5690 | cgraph_node *node; | |
5691 | ||
5692 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) | |
5693 | { | |
5694 | ipa_node_params *info = IPA_NODE_REF (node); | |
5695 | bool dumped_sth = false; | |
5696 | bool found_useful_result = false; | |
5697 | ||
6cf67b62 | 5698 | if (!opt_for_fn (node->decl, flag_ipa_bit_cp) || !info) |
209ca542 PK |
5699 | { |
5700 | if (dump_file) | |
5701 | fprintf (dump_file, "Not considering %s for ipa bitwise propagation " | |
15bbb5cc | 5702 | "; -fipa-bit-cp: disabled.\n", |
3629ff8a | 5703 | node->dump_name ()); |
209ca542 PK |
5704 | continue; |
5705 | } | |
5706 | ||
5707 | if (info->ipcp_orig_node) | |
5708 | info = IPA_NODE_REF (info->ipcp_orig_node); | |
68188fff MJ |
5709 | if (!info->lattices) |
5710 | /* Newly expanded artificial thunks do not have lattices. */ | |
5711 | continue; | |
209ca542 PK |
5712 | |
5713 | unsigned count = ipa_get_param_count (info); | |
5714 | for (unsigned i = 0; i < count; i++) | |
5715 | { | |
5716 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
5717 | if (plats->bits_lattice.constant_p ()) | |
5718 | { | |
5719 | found_useful_result = true; | |
5720 | break; | |
5721 | } | |
5722 | } | |
5723 | ||
155c9907 JJ |
5724 | if (!found_useful_result) |
5725 | continue; | |
209ca542 | 5726 | |
9d3e0adc ML |
5727 | ipcp_transformation_initialize (); |
5728 | ipcp_transformation *ts = ipcp_transformation_sum->get_create (node); | |
155c9907 | 5729 | vec_safe_reserve_exact (ts->bits, count); |
209ca542 | 5730 | |
155c9907 JJ |
5731 | for (unsigned i = 0; i < count; i++) |
5732 | { | |
5733 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
86cd0334 | 5734 | ipa_bits *jfbits; |
209ca542 | 5735 | |
155c9907 | 5736 | if (plats->bits_lattice.constant_p ()) |
86cd0334 MJ |
5737 | jfbits |
5738 | = ipa_get_ipa_bits_for_value (plats->bits_lattice.get_value (), | |
5739 | plats->bits_lattice.get_mask ()); | |
155c9907 | 5740 | else |
86cd0334 | 5741 | jfbits = NULL; |
209ca542 | 5742 | |
86cd0334 MJ |
5743 | ts->bits->quick_push (jfbits); |
5744 | if (!dump_file || !jfbits) | |
155c9907 JJ |
5745 | continue; |
5746 | if (!dumped_sth) | |
5747 | { | |
464d0118 ML |
5748 | fprintf (dump_file, "Propagated bits info for function %s:\n", |
5749 | node->dump_name ()); | |
155c9907 JJ |
5750 | dumped_sth = true; |
5751 | } | |
5752 | fprintf (dump_file, " param %i: value = ", i); | |
86cd0334 | 5753 | print_hex (jfbits->value, dump_file); |
155c9907 | 5754 | fprintf (dump_file, ", mask = "); |
86cd0334 | 5755 | print_hex (jfbits->mask, dump_file); |
155c9907 JJ |
5756 | fprintf (dump_file, "\n"); |
5757 | } | |
209ca542 PK |
5758 | } |
5759 | } | |
8bc5448f KV |
5760 | |
5761 | /* Look up all VR information that we have discovered and copy it over | |
5762 | to the transformation summary. */ | |
5763 | ||
5764 | static void | |
5765 | ipcp_store_vr_results (void) | |
5766 | { | |
5767 | cgraph_node *node; | |
5768 | ||
5769 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) | |
155c9907 JJ |
5770 | { |
5771 | ipa_node_params *info = IPA_NODE_REF (node); | |
5772 | bool found_useful_result = false; | |
8bc5448f | 5773 | |
a09ccc22 | 5774 | if (!info || !opt_for_fn (node->decl, flag_ipa_vrp)) |
155c9907 JJ |
5775 | { |
5776 | if (dump_file) | |
5777 | fprintf (dump_file, "Not considering %s for VR discovery " | |
5778 | "and propagate; -fipa-ipa-vrp: disabled.\n", | |
3629ff8a | 5779 | node->dump_name ()); |
155c9907 JJ |
5780 | continue; |
5781 | } | |
8bc5448f | 5782 | |
155c9907 JJ |
5783 | if (info->ipcp_orig_node) |
5784 | info = IPA_NODE_REF (info->ipcp_orig_node); | |
68188fff MJ |
5785 | if (!info->lattices) |
5786 | /* Newly expanded artificial thunks do not have lattices. */ | |
5787 | continue; | |
8bc5448f | 5788 | |
155c9907 JJ |
5789 | unsigned count = ipa_get_param_count (info); |
5790 | for (unsigned i = 0; i < count; i++) | |
5791 | { | |
5792 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
5793 | if (!plats->m_value_range.bottom_p () | |
5794 | && !plats->m_value_range.top_p ()) | |
5795 | { | |
5796 | found_useful_result = true; | |
5797 | break; | |
5798 | } | |
5799 | } | |
5800 | if (!found_useful_result) | |
5801 | continue; | |
8bc5448f | 5802 | |
9d3e0adc ML |
5803 | ipcp_transformation_initialize (); |
5804 | ipcp_transformation *ts = ipcp_transformation_sum->get_create (node); | |
155c9907 | 5805 | vec_safe_reserve_exact (ts->m_vr, count); |
8bc5448f | 5806 | |
155c9907 JJ |
5807 | for (unsigned i = 0; i < count; i++) |
5808 | { | |
5809 | ipcp_param_lattices *plats = ipa_get_parm_lattices (info, i); | |
5810 | ipa_vr vr; | |
8bc5448f | 5811 | |
155c9907 JJ |
5812 | if (!plats->m_value_range.bottom_p () |
5813 | && !plats->m_value_range.top_p ()) | |
5814 | { | |
5815 | vr.known = true; | |
54994253 AH |
5816 | vr.type = plats->m_value_range.m_vr.kind (); |
5817 | vr.min = wi::to_wide (plats->m_value_range.m_vr.min ()); | |
5818 | vr.max = wi::to_wide (plats->m_value_range.m_vr.max ()); | |
155c9907 JJ |
5819 | } |
5820 | else | |
5821 | { | |
5822 | vr.known = false; | |
5823 | vr.type = VR_VARYING; | |
5824 | vr.min = vr.max = wi::zero (INT_TYPE_SIZE); | |
5825 | } | |
5826 | ts->m_vr->quick_push (vr); | |
5827 | } | |
5828 | } | |
8bc5448f KV |
5829 | } |
5830 | ||
518dc859 | 5831 | /* The IPCP driver. */ |
310bc633 | 5832 | |
3cc1cccc | 5833 | static unsigned int |
518dc859 RL |
5834 | ipcp_driver (void) |
5835 | { | |
99b1c316 | 5836 | class ipa_topo_info topo; |
310bc633 | 5837 | |
1ac2bdb4 ML |
5838 | if (edge_clone_summaries == NULL) |
5839 | edge_clone_summaries = new edge_clone_summary_t (symtab); | |
5840 | ||
310bc633 MJ |
5841 | ipa_check_create_node_params (); |
5842 | ipa_check_create_edge_args (); | |
9e0b0ec3 | 5843 | clone_num_suffixes = new hash_map<const char *, unsigned>; |
aef83682 | 5844 | |
518dc859 RL |
5845 | if (dump_file) |
5846 | { | |
ca30a539 JH |
5847 | fprintf (dump_file, "\nIPA structures before propagation:\n"); |
5848 | if (dump_flags & TDF_DETAILS) | |
155c9907 | 5849 | ipa_print_all_params (dump_file); |
ca30a539 | 5850 | ipa_print_all_jump_functions (dump_file); |
518dc859 | 5851 | } |
310bc633 MJ |
5852 | |
5853 | /* Topological sort. */ | |
5854 | build_toporder_info (&topo); | |
5855 | /* Do the interprocedural propagation. */ | |
5856 | ipcp_propagate_stage (&topo); | |
5857 | /* Decide what constant propagation and cloning should be performed. */ | |
5858 | ipcp_decision_stage (&topo); | |
209ca542 PK |
5859 | /* Store results of bits propagation. */ |
5860 | ipcp_store_bits_results (); | |
8bc5448f KV |
5861 | /* Store results of value range propagation. */ |
5862 | ipcp_store_vr_results (); | |
310bc633 | 5863 | |
518dc859 | 5864 | /* Free all IPCP structures. */ |
53aedcce | 5865 | delete clone_num_suffixes; |
310bc633 | 5866 | free_toporder_info (&topo); |
1ac2bdb4 | 5867 | delete edge_clone_summaries; |
e67343d7 | 5868 | edge_clone_summaries = NULL; |
e33c6cd6 | 5869 | ipa_free_all_structures_after_ipa_cp (); |
518dc859 RL |
5870 | if (dump_file) |
5871 | fprintf (dump_file, "\nIPA constant propagation end\n"); | |
c2924966 | 5872 | return 0; |
518dc859 RL |
5873 | } |
5874 | ||
3949c4a7 MJ |
5875 | /* Initialization and computation of IPCP data structures. This is the initial |
5876 | intraprocedural analysis of functions, which gathers information to be | |
5877 | propagated later on. */ | |
5878 | ||
129a37fc JH |
5879 | static void |
5880 | ipcp_generate_summary (void) | |
5881 | { | |
3949c4a7 MJ |
5882 | struct cgraph_node *node; |
5883 | ||
129a37fc JH |
5884 | if (dump_file) |
5885 | fprintf (dump_file, "\nIPA constant propagation start:\n"); | |
129a37fc | 5886 | ipa_register_cgraph_hooks (); |
3949c4a7 | 5887 | |
c47d0034 | 5888 | FOR_EACH_FUNCTION_WITH_GIMPLE_BODY (node) |
7e729474 | 5889 | ipa_analyze_node (node); |
129a37fc JH |
5890 | } |
5891 | ||
fb3f88cc | 5892 | /* Write ipcp summary for nodes in SET. */ |
310bc633 | 5893 | |
fb3f88cc | 5894 | static void |
f27c1867 | 5895 | ipcp_write_summary (void) |
fb3f88cc | 5896 | { |
f27c1867 | 5897 | ipa_prop_write_jump_functions (); |
fb3f88cc JH |
5898 | } |
5899 | ||
5900 | /* Read ipcp summary. */ | |
310bc633 | 5901 | |
fb3f88cc JH |
5902 | static void |
5903 | ipcp_read_summary (void) | |
5904 | { | |
5905 | ipa_prop_read_jump_functions (); | |
5906 | } | |
5907 | ||
27a4cd48 DM |
5908 | namespace { |
5909 | ||
5910 | const pass_data pass_data_ipa_cp = | |
5911 | { | |
5912 | IPA_PASS, /* type */ | |
5913 | "cp", /* name */ | |
5914 | OPTGROUP_NONE, /* optinfo_flags */ | |
27a4cd48 DM |
5915 | TV_IPA_CONSTANT_PROP, /* tv_id */ |
5916 | 0, /* properties_required */ | |
5917 | 0, /* properties_provided */ | |
5918 | 0, /* properties_destroyed */ | |
5919 | 0, /* todo_flags_start */ | |
5920 | ( TODO_dump_symtab | TODO_remove_functions ), /* todo_flags_finish */ | |
518dc859 | 5921 | }; |
27a4cd48 DM |
5922 | |
5923 | class pass_ipa_cp : public ipa_opt_pass_d | |
5924 | { | |
5925 | public: | |
c3284718 RS |
5926 | pass_ipa_cp (gcc::context *ctxt) |
5927 | : ipa_opt_pass_d (pass_data_ipa_cp, ctxt, | |
5928 | ipcp_generate_summary, /* generate_summary */ | |
5929 | ipcp_write_summary, /* write_summary */ | |
5930 | ipcp_read_summary, /* read_summary */ | |
04be694e | 5931 | ipcp_write_transformation_summaries, /* |
c3284718 | 5932 | write_optimization_summary */ |
04be694e | 5933 | ipcp_read_transformation_summaries, /* |
c3284718 RS |
5934 | read_optimization_summary */ |
5935 | NULL, /* stmt_fixup */ | |
5936 | 0, /* function_transform_todo_flags_start */ | |
5937 | ipcp_transform_function, /* function_transform */ | |
5938 | NULL) /* variable_transform */ | |
27a4cd48 DM |
5939 | {} |
5940 | ||
5941 | /* opt_pass methods: */ | |
1a3d085c TS |
5942 | virtual bool gate (function *) |
5943 | { | |
5944 | /* FIXME: We should remove the optimize check after we ensure we never run | |
5945 | IPA passes when not optimizing. */ | |
2bf86c84 | 5946 | return (flag_ipa_cp && optimize) || in_lto_p; |
1a3d085c TS |
5947 | } |
5948 | ||
be55bfe6 | 5949 | virtual unsigned int execute (function *) { return ipcp_driver (); } |
27a4cd48 DM |
5950 | |
5951 | }; // class pass_ipa_cp | |
5952 | ||
5953 | } // anon namespace | |
5954 | ||
5955 | ipa_opt_pass_d * | |
5956 | make_pass_ipa_cp (gcc::context *ctxt) | |
5957 | { | |
5958 | return new pass_ipa_cp (ctxt); | |
5959 | } | |
3edf64aa DM |
5960 | |
5961 | /* Reset all state within ipa-cp.c so that we can rerun the compiler | |
5962 | within the same process. For use by toplev::finalize. */ | |
5963 | ||
5964 | void | |
5965 | ipa_cp_c_finalize (void) | |
5966 | { | |
e7a74006 | 5967 | max_count = profile_count::uninitialized (); |
3edf64aa | 5968 | overall_size = 0; |
f7725a48 | 5969 | orig_overall_size = 0; |
12e088ba | 5970 | ipcp_free_transformation_sum (); |
3edf64aa | 5971 | } |