Mercurial > hg > CbC > CbC_gcc
annotate gcc/ipa-prop.h @ 111:04ced10e8804
gcc 7
| author | kono |
|---|---|
| date | Fri, 27 Oct 2017 22:46:09 +0900 |
| parents | f6334be47118 |
| children | 84e7813d76e9 |
| rev | line source |
|---|---|
| 0 | 1 /* Interprocedural analyses. |
| 111 | 2 Copyright (C) 2005-2017 Free Software Foundation, Inc. |
| 0 | 3 |
| 4 This file is part of GCC. | |
| 5 | |
| 6 GCC is free software; you can redistribute it and/or modify it under | |
| 7 the terms of the GNU General Public License as published by the Free | |
| 8 Software Foundation; either version 3, or (at your option) any later | |
| 9 version. | |
| 10 | |
| 11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 12 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
| 17 along with GCC; see the file COPYING3. If not see | |
| 18 <http://www.gnu.org/licenses/>. */ | |
| 19 | |
| 20 #ifndef IPA_PROP_H | |
| 21 #define IPA_PROP_H | |
| 22 | |
| 23 /* The following definitions and interfaces are used by | |
|
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24 interprocedural analyses or parameters. */ |
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25 |
| 111 | 26 #define IPA_UNDESCRIBED_USE -1 |
| 27 | |
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28 /* ipa-prop.c stuff (ipa-cp, indirect inlining): */ |
| 0 | 29 |
| 30 /* A jump function for a callsite represents the values passed as actual | |
| 111 | 31 arguments of the callsite. They were originally proposed in a paper called |
| 32 "Interprocedural Constant Propagation", by David Callahan, Keith D Cooper, | |
| 33 Ken Kennedy, Linda Torczon in Comp86, pg 152-161. There are three main | |
| 34 types of values : | |
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35 |
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36 Pass-through - the caller's formal parameter is passed as an actual |
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37 argument, possibly one simple operation performed on it. |
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38 Constant - a constant (is_gimple_ip_invariant)is passed as an actual |
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39 argument. |
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40 Unknown - neither of the above. |
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41 |
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42 IPA_JF_ANCESTOR is a special pass-through jump function, which means that |
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43 the result is an address of a part of the object pointed to by the formal |
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44 parameter to which the function refers. It is mainly intended to represent |
| 111 | 45 getting addresses of ancestor fields in C++ |
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46 (e.g. &this_1(D)->D.1766.D.1756). Note that if the original pointer is |
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47 NULL, ancestor jump function must behave like a simple pass-through. |
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48 |
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49 Other pass-through functions can either simply pass on an unchanged formal |
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50 parameter or can apply one simple binary operation to it (such jump |
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51 functions are called polynomial). |
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52 |
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53 Jump functions are computed in ipa-prop.c by function |
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54 update_call_notes_after_inlining. Some information can be lost and jump |
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55 functions degraded accordingly when inlining, see |
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56 update_call_notes_after_inlining in the same file. */ |
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57 |
| 0 | 58 enum jump_func_type |
| 59 { | |
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60 IPA_JF_UNKNOWN = 0, /* newly allocated and zeroed jump functions default */ |
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61 IPA_JF_CONST, /* represented by field costant */ |
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62 IPA_JF_PASS_THROUGH, /* represented by field pass_through */ |
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63 IPA_JF_ANCESTOR /* represented by field ancestor */ |
| 0 | 64 }; |
| 65 | |
| 111 | 66 struct ipa_cst_ref_desc; |
| 67 | |
| 68 /* Structure holding data required to describe a constant jump function. */ | |
| 69 struct GTY(()) ipa_constant_data | |
| 70 { | |
| 71 /* THe value of the constant. */ | |
| 72 tree value; | |
| 73 /* Pointer to the structure that describes the reference. */ | |
| 74 struct ipa_cst_ref_desc GTY((skip)) *rdesc; | |
| 75 }; | |
| 76 | |
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77 /* Structure holding data required to describe a pass-through jump function. */ |
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78 |
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79 struct GTY(()) ipa_pass_through_data |
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80 { |
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81 /* If an operation is to be performed on the original parameter, this is the |
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82 second (constant) operand. */ |
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83 tree operand; |
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84 /* Number of the caller's formal parameter being passed. */ |
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85 int formal_id; |
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86 /* Operation that is performed on the argument before it is passed on. |
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87 NOP_EXPR means no operation. Otherwise oper must be a simple binary |
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88 arithmetic operation where the caller's parameter is the first operand and |
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89 operand field from this structure is the second one. */ |
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90 enum tree_code operation; |
| 111 | 91 /* When the passed value is a pointer, it is set to true only when we are |
| 92 certain that no write to the object it points to has occurred since the | |
| 93 caller functions started execution, except for changes noted in the | |
| 94 aggregate part of the jump function (see description of | |
| 95 ipa_agg_jump_function). The flag is used only when the operation is | |
| 96 NOP_EXPR. */ | |
| 97 unsigned agg_preserved : 1; | |
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98 }; |
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99 |
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100 /* Structure holding data required to describe an ancestor pass-through |
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101 jump function. */ |
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102 |
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103 struct GTY(()) ipa_ancestor_jf_data |
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104 { |
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105 /* Offset of the field representing the ancestor. */ |
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106 HOST_WIDE_INT offset; |
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107 /* Number of the caller's formal parameter being passed. */ |
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108 int formal_id; |
| 111 | 109 /* Flag with the same meaning like agg_preserve in ipa_pass_through_data. */ |
| 110 unsigned agg_preserved : 1; | |
| 111 }; | |
| 112 | |
| 113 /* An element in an aggegate part of a jump function describing a known value | |
| 114 at a given offset. When it is part of a pass-through jump function with | |
| 115 agg_preserved set or an ancestor jump function with agg_preserved set, all | |
| 116 unlisted positions are assumed to be preserved but the value can be a type | |
| 117 node, which means that the particular piece (starting at offset and having | |
| 118 the size of the type) is clobbered with an unknown value. When | |
| 119 agg_preserved is false or the type of the containing jump function is | |
| 120 different, all unlisted parts are assumed to be unknown and all values must | |
| 121 fulfill is_gimple_ip_invariant. */ | |
| 122 | |
| 123 struct GTY(()) ipa_agg_jf_item | |
| 124 { | |
| 125 /* The offset at which the known value is located within the aggregate. */ | |
| 126 HOST_WIDE_INT offset; | |
| 127 | |
| 128 /* The known constant or type if this is a clobber. */ | |
| 129 tree value; | |
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130 }; |
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131 |
| 111 | 132 |
| 133 /* Aggregate jump function - i.e. description of contents of aggregates passed | |
| 134 either by reference or value. */ | |
| 135 | |
| 136 struct GTY(()) ipa_agg_jump_function | |
| 137 { | |
| 138 /* Description of the individual items. */ | |
| 139 vec<ipa_agg_jf_item, va_gc> *items; | |
| 140 /* True if the data was passed by reference (as opposed to by value). */ | |
| 141 bool by_ref; | |
| 142 }; | |
| 143 | |
| 144 typedef struct ipa_agg_jump_function *ipa_agg_jump_function_p; | |
| 145 | |
| 146 /* Information about zero/non-zero bits. */ | |
| 147 struct GTY(()) ipa_bits | |
| 0 | 148 { |
| 111 | 149 /* The propagated value. */ |
| 150 widest_int value; | |
| 151 /* Mask corresponding to the value. | |
| 152 Similar to ccp_lattice_t, if xth bit of mask is 0, | |
| 153 implies xth bit of value is constant. */ | |
| 154 widest_int mask; | |
| 155 }; | |
| 156 | |
| 157 /* Info about value ranges. */ | |
| 158 | |
| 159 struct GTY(()) ipa_vr | |
| 160 { | |
| 161 /* The data fields below are valid only if known is true. */ | |
| 162 bool known; | |
| 163 enum value_range_type type; | |
| 164 wide_int min; | |
| 165 wide_int max; | |
| 0 | 166 }; |
| 167 | |
| 168 /* A jump function for a callsite represents the values passed as actual | |
| 169 arguments of the callsite. See enum jump_func_type for the various | |
| 170 types of jump functions supported. */ | |
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171 struct GTY (()) ipa_jump_func |
| 0 | 172 { |
| 111 | 173 /* Aggregate contants description. See struct ipa_agg_jump_function and its |
| 174 description. */ | |
| 175 struct ipa_agg_jump_function agg; | |
| 176 | |
| 177 /* Information about zero/non-zero bits. The pointed to structure is shared | |
| 178 betweed different jump functions. Use ipa_set_jfunc_bits to set this | |
| 179 field. */ | |
| 180 struct ipa_bits *bits; | |
| 181 | |
| 182 /* Information about value range, containing valid data only when vr_known is | |
| 183 true. The pointed to structure is shared betweed different jump | |
| 184 functions. Use ipa_set_jfunc_vr to set this field. */ | |
| 185 struct value_range *m_vr; | |
| 186 | |
| 0 | 187 enum jump_func_type type; |
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188 /* Represents a value of a jump function. pass_through is used only in jump |
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189 function context. constant represents the actual constant in constant jump |
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190 functions and member_cst holds constant c++ member functions. */ |
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191 union jump_func_value |
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192 { |
| 111 | 193 struct ipa_constant_data GTY ((tag ("IPA_JF_CONST"))) constant; |
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194 struct ipa_pass_through_data GTY ((tag ("IPA_JF_PASS_THROUGH"))) pass_through; |
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195 struct ipa_ancestor_jf_data GTY ((tag ("IPA_JF_ANCESTOR"))) ancestor; |
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196 } GTY ((desc ("%1.type"))) value; |
| 0 | 197 }; |
| 198 | |
| 111 | 199 |
| 200 /* Return the constant stored in a constant jump functin JFUNC. */ | |
| 201 | |
| 202 static inline tree | |
| 203 ipa_get_jf_constant (struct ipa_jump_func *jfunc) | |
| 204 { | |
| 205 gcc_checking_assert (jfunc->type == IPA_JF_CONST); | |
| 206 return jfunc->value.constant.value; | |
| 207 } | |
| 208 | |
| 209 static inline struct ipa_cst_ref_desc * | |
| 210 ipa_get_jf_constant_rdesc (struct ipa_jump_func *jfunc) | |
| 211 { | |
| 212 gcc_checking_assert (jfunc->type == IPA_JF_CONST); | |
| 213 return jfunc->value.constant.rdesc; | |
| 214 } | |
| 215 | |
| 216 /* Return the operand of a pass through jmp function JFUNC. */ | |
| 217 | |
| 218 static inline tree | |
| 219 ipa_get_jf_pass_through_operand (struct ipa_jump_func *jfunc) | |
| 220 { | |
| 221 gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
| 222 return jfunc->value.pass_through.operand; | |
| 223 } | |
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224 |
| 111 | 225 /* Return the number of the caller's formal parameter that a pass through jump |
| 226 function JFUNC refers to. */ | |
| 227 | |
| 228 static inline int | |
| 229 ipa_get_jf_pass_through_formal_id (struct ipa_jump_func *jfunc) | |
| 230 { | |
| 231 gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
| 232 return jfunc->value.pass_through.formal_id; | |
| 233 } | |
| 234 | |
| 235 /* Return operation of a pass through jump function JFUNC. */ | |
| 236 | |
| 237 static inline enum tree_code | |
| 238 ipa_get_jf_pass_through_operation (struct ipa_jump_func *jfunc) | |
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239 { |
| 111 | 240 gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); |
| 241 return jfunc->value.pass_through.operation; | |
| 242 } | |
| 243 | |
| 244 /* Return the agg_preserved flag of a pass through jump function JFUNC. */ | |
| 245 | |
| 246 static inline bool | |
| 247 ipa_get_jf_pass_through_agg_preserved (struct ipa_jump_func *jfunc) | |
| 248 { | |
| 249 gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
| 250 return jfunc->value.pass_through.agg_preserved; | |
| 251 } | |
| 252 | |
| 253 /* Return true if pass through jump function JFUNC preserves type | |
| 254 information. */ | |
|
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255 |
| 111 | 256 static inline bool |
| 257 ipa_get_jf_pass_through_type_preserved (struct ipa_jump_func *jfunc) | |
| 258 { | |
| 259 gcc_checking_assert (jfunc->type == IPA_JF_PASS_THROUGH); | |
| 260 return jfunc->value.pass_through.agg_preserved; | |
| 261 } | |
| 262 | |
| 263 /* Return the offset of an ancestor jump function JFUNC. */ | |
| 264 | |
| 265 static inline HOST_WIDE_INT | |
| 266 ipa_get_jf_ancestor_offset (struct ipa_jump_func *jfunc) | |
| 0 | 267 { |
| 111 | 268 gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); |
| 269 return jfunc->value.ancestor.offset; | |
| 270 } | |
| 271 | |
| 272 /* Return the number of the caller's formal parameter that an ancestor jump | |
| 273 function JFUNC refers to. */ | |
| 274 | |
| 275 static inline int | |
| 276 ipa_get_jf_ancestor_formal_id (struct ipa_jump_func *jfunc) | |
| 277 { | |
| 278 gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); | |
| 279 return jfunc->value.ancestor.formal_id; | |
| 280 } | |
| 281 | |
| 282 /* Return the agg_preserved flag of an ancestor jump function JFUNC. */ | |
| 0 | 283 |
| 111 | 284 static inline bool |
| 285 ipa_get_jf_ancestor_agg_preserved (struct ipa_jump_func *jfunc) | |
| 286 { | |
| 287 gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); | |
| 288 return jfunc->value.ancestor.agg_preserved; | |
| 289 } | |
| 290 | |
| 291 /* Return true if ancestor jump function JFUNC presrves type information. */ | |
| 292 | |
| 293 static inline bool | |
| 294 ipa_get_jf_ancestor_type_preserved (struct ipa_jump_func *jfunc) | |
| 0 | 295 { |
| 111 | 296 gcc_checking_assert (jfunc->type == IPA_JF_ANCESTOR); |
| 297 return jfunc->value.ancestor.agg_preserved; | |
| 298 } | |
| 299 | |
| 300 /* Summary describing a single formal parameter. */ | |
| 301 | |
| 302 struct GTY(()) ipa_param_descriptor | |
| 303 { | |
| 304 /* In analysis and modification phase, this is the PARAM_DECL of this | |
| 305 parameter, in IPA LTO phase, this is the type of the the described | |
| 306 parameter or NULL if not known. Do not read this field directly but | |
| 307 through ipa_get_param and ipa_get_type as appropriate. */ | |
| 308 tree decl_or_type; | |
| 309 /* If all uses of the parameter are described by ipa-prop structures, this | |
| 310 says how many there are. If any use could not be described by means of | |
| 311 ipa-prop structures, this is IPA_UNDESCRIBED_USE. */ | |
| 312 int controlled_uses; | |
| 313 unsigned int move_cost : 31; | |
|
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314 /* The parameter is used. */ |
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315 unsigned used : 1; |
| 0 | 316 }; |
| 317 | |
| 318 /* ipa_node_params stores information related to formal parameters of functions | |
| 319 and some other information for interprocedural passes that operate on | |
| 320 parameters (such as ipa-cp). */ | |
| 111 | 321 |
| 322 struct GTY((for_user)) ipa_node_params | |
| 0 | 323 { |
| 111 | 324 /* Default constructor. */ |
| 325 ipa_node_params (); | |
| 326 | |
| 327 /* Default destructor. */ | |
| 328 ~ipa_node_params (); | |
| 329 | |
| 330 /* Information about individual formal parameters that are gathered when | |
| 331 summaries are generated. */ | |
| 332 vec<ipa_param_descriptor, va_gc> *descriptors; | |
| 0 | 333 /* Pointer to an array of structures describing individual formal |
| 334 parameters. */ | |
| 111 | 335 struct ipcp_param_lattices * GTY((skip)) lattices; |
| 0 | 336 /* Only for versioned nodes this field would not be NULL, |
| 337 it points to the node that IPA cp cloned from. */ | |
| 111 | 338 struct cgraph_node * GTY((skip)) ipcp_orig_node; |
| 339 /* If this node is an ipa-cp clone, these are the known constants that | |
| 340 describe what it has been specialized for. */ | |
| 341 vec<tree> GTY((skip)) known_csts; | |
| 342 /* If this node is an ipa-cp clone, these are the known polymorphic contexts | |
| 343 that describe what it has been specialized for. */ | |
| 344 vec<ipa_polymorphic_call_context> GTY((skip)) known_contexts; | |
| 345 /* Whether the param uses analysis and jump function computation has already | |
| 346 been performed. */ | |
| 347 unsigned analysis_done : 1; | |
| 348 /* Whether the function is enqueued in ipa-cp propagation stack. */ | |
| 349 unsigned node_enqueued : 1; | |
| 350 /* Whether we should create a specialized version based on values that are | |
| 351 known to be constant in all contexts. */ | |
| 352 unsigned do_clone_for_all_contexts : 1; | |
| 353 /* Set if this is an IPA-CP clone for all contexts. */ | |
| 354 unsigned is_all_contexts_clone : 1; | |
| 355 /* Node has been completely replaced by clones and will be removed after | |
| 356 ipa-cp is finished. */ | |
| 357 unsigned node_dead : 1; | |
| 358 /* Node is involved in a recursion, potentionally indirect. */ | |
| 359 unsigned node_within_scc : 1; | |
| 360 /* Node is calling a private function called only once. */ | |
| 361 unsigned node_calling_single_call : 1; | |
| 362 /* False when there is something makes versioning impossible. */ | |
| 363 unsigned versionable : 1; | |
| 364 }; | |
| 365 | |
| 366 inline | |
| 367 ipa_node_params::ipa_node_params () | |
| 368 : descriptors (NULL), lattices (NULL), ipcp_orig_node (NULL), | |
| 369 known_csts (vNULL), known_contexts (vNULL), analysis_done (0), | |
| 370 node_enqueued (0), do_clone_for_all_contexts (0), is_all_contexts_clone (0), | |
| 371 node_dead (0), node_within_scc (0), node_calling_single_call (0), | |
| 372 versionable (0) | |
| 373 { | |
| 374 } | |
| 375 | |
| 376 inline | |
| 377 ipa_node_params::~ipa_node_params () | |
| 378 { | |
| 379 free (lattices); | |
| 380 known_csts.release (); | |
| 381 known_contexts.release (); | |
| 382 } | |
| 383 | |
| 384 /* Intermediate information that we get from alias analysis about a particular | |
| 385 parameter in a particular basic_block. When a parameter or the memory it | |
| 386 references is marked modified, we use that information in all dominated | |
| 387 blocks without consulting alias analysis oracle. */ | |
| 388 | |
| 389 struct ipa_param_aa_status | |
| 390 { | |
| 391 /* Set when this structure contains meaningful information. If not, the | |
| 392 structure describing a dominating BB should be used instead. */ | |
| 393 bool valid; | |
| 394 | |
| 395 /* Whether we have seen something which might have modified the data in | |
| 396 question. PARM is for the parameter itself, REF is for data it points to | |
| 397 but using the alias type of individual accesses and PT is the same thing | |
| 398 but for computing aggregate pass-through functions using a very inclusive | |
| 399 ao_ref. */ | |
| 400 bool parm_modified, ref_modified, pt_modified; | |
| 401 }; | |
| 402 | |
| 403 /* Information related to a given BB that used only when looking at function | |
| 404 body. */ | |
| 405 | |
| 406 struct ipa_bb_info | |
| 407 { | |
| 408 /* Call graph edges going out of this BB. */ | |
| 409 vec<cgraph_edge *> cg_edges; | |
| 410 /* Alias analysis statuses of each formal parameter at this bb. */ | |
| 411 vec<ipa_param_aa_status> param_aa_statuses; | |
| 412 }; | |
| 413 | |
| 414 /* Structure with global information that is only used when looking at function | |
| 415 body. */ | |
| 416 | |
| 417 struct ipa_func_body_info | |
| 418 { | |
| 419 /* The node that is being analyzed. */ | |
| 420 cgraph_node *node; | |
| 421 | |
| 422 /* Its info. */ | |
| 423 struct ipa_node_params *info; | |
| 424 | |
| 425 /* Information about individual BBs. */ | |
| 426 vec<ipa_bb_info> bb_infos; | |
| 427 | |
| 428 /* Number of parameters. */ | |
| 429 int param_count; | |
| 430 | |
| 431 /* Number of statements already walked by when analyzing this function. */ | |
| 432 unsigned int aa_walked; | |
| 0 | 433 }; |
| 434 | |
| 435 /* ipa_node_params access functions. Please use these to access fields that | |
| 436 are or will be shared among various passes. */ | |
| 437 | |
| 438 /* Return the number of formal parameters. */ | |
| 439 | |
| 440 static inline int | |
| 441 ipa_get_param_count (struct ipa_node_params *info) | |
| 442 { | |
| 111 | 443 return vec_safe_length (info->descriptors); |
| 0 | 444 } |
| 445 | |
| 446 /* Return the declaration of Ith formal parameter of the function corresponding | |
| 447 to INFO. Note there is no setter function as this array is built just once | |
| 111 | 448 using ipa_initialize_node_params. This function should not be called in |
| 449 WPA. */ | |
| 0 | 450 |
| 451 static inline tree | |
| 452 ipa_get_param (struct ipa_node_params *info, int i) | |
| 453 { | |
| 111 | 454 gcc_checking_assert (info->descriptors); |
| 455 gcc_checking_assert (!flag_wpa); | |
| 456 tree t = (*info->descriptors)[i].decl_or_type; | |
| 457 gcc_checking_assert (TREE_CODE (t) == PARM_DECL); | |
| 458 return t; | |
| 459 } | |
| 460 | |
| 461 /* Return the type of Ith formal parameter of the function corresponding | |
| 462 to INFO if it is known or NULL if not. */ | |
| 463 | |
| 464 static inline tree | |
| 465 ipa_get_type (struct ipa_node_params *info, int i) | |
| 466 { | |
| 467 gcc_checking_assert (info->descriptors); | |
| 468 tree t = (*info->descriptors)[i].decl_or_type; | |
| 469 if (!t) | |
| 470 return NULL; | |
| 471 if (TYPE_P (t)) | |
| 472 return t; | |
| 473 gcc_checking_assert (TREE_CODE (t) == PARM_DECL); | |
| 474 return TREE_TYPE (t); | |
| 475 } | |
| 476 | |
| 477 /* Return the move cost of Ith formal parameter of the function corresponding | |
| 478 to INFO. */ | |
| 479 | |
| 480 static inline int | |
| 481 ipa_get_param_move_cost (struct ipa_node_params *info, int i) | |
| 482 { | |
| 483 gcc_checking_assert (info->descriptors); | |
| 484 return (*info->descriptors)[i].move_cost; | |
| 0 | 485 } |
| 486 | |
| 111 | 487 /* Set the used flag corresponding to the Ith formal parameter of the function |
| 488 associated with INFO to VAL. */ | |
| 489 | |
| 490 static inline void | |
| 491 ipa_set_param_used (struct ipa_node_params *info, int i, bool val) | |
| 492 { | |
| 493 gcc_checking_assert (info->descriptors); | |
| 494 (*info->descriptors)[i].used = val; | |
| 495 } | |
| 496 | |
| 497 /* Return how many uses described by ipa-prop a parameter has or | |
| 498 IPA_UNDESCRIBED_USE if there is a use that is not described by these | |
| 499 structures. */ | |
| 500 static inline int | |
| 501 ipa_get_controlled_uses (struct ipa_node_params *info, int i) | |
| 502 { | |
| 503 /* FIXME: introducing speculation causes out of bounds access here. */ | |
| 504 if (vec_safe_length (info->descriptors) > (unsigned)i) | |
| 505 return (*info->descriptors)[i].controlled_uses; | |
| 506 return IPA_UNDESCRIBED_USE; | |
| 507 } | |
| 508 | |
| 509 /* Set the controlled counter of a given parameter. */ | |
| 510 | |
| 511 static inline void | |
| 512 ipa_set_controlled_uses (struct ipa_node_params *info, int i, int val) | |
| 513 { | |
| 514 gcc_checking_assert (info->descriptors); | |
| 515 (*info->descriptors)[i].controlled_uses = val; | |
| 516 } | |
| 517 | |
| 518 /* Return the used flag corresponding to the Ith formal parameter of the | |
| 519 function associated with INFO. */ | |
| 0 | 520 |
| 521 static inline bool | |
|
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522 ipa_is_param_used (struct ipa_node_params *info, int i) |
| 0 | 523 { |
| 111 | 524 gcc_checking_assert (info->descriptors); |
| 525 return (*info->descriptors)[i].used; | |
|
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526 } |
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527 |
| 111 | 528 /* Information about replacements done in aggregates for a given node (each |
| 529 node has its linked list). */ | |
| 530 struct GTY(()) ipa_agg_replacement_value | |
|
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531 { |
| 111 | 532 /* Next item in the linked list. */ |
| 533 struct ipa_agg_replacement_value *next; | |
| 534 /* Offset within the aggregate. */ | |
| 535 HOST_WIDE_INT offset; | |
| 536 /* The constant value. */ | |
| 537 tree value; | |
| 538 /* The paramter index. */ | |
| 539 int index; | |
| 540 /* Whether the value was passed by reference. */ | |
| 541 bool by_ref; | |
| 542 }; | |
| 0 | 543 |
| 111 | 544 /* Structure holding information for the transformation phase of IPA-CP. */ |
| 0 | 545 |
| 111 | 546 struct GTY(()) ipcp_transformation_summary |
| 0 | 547 { |
| 111 | 548 /* Linked list of known aggregate values. */ |
| 549 ipa_agg_replacement_value *agg_values; | |
| 550 /* Known bits information. */ | |
| 551 vec<ipa_bits *, va_gc> *bits; | |
| 552 /* Value range information. */ | |
| 553 vec<ipa_vr, va_gc> *m_vr; | |
| 554 }; | |
| 0 | 555 |
| 111 | 556 void ipa_set_node_agg_value_chain (struct cgraph_node *node, |
| 557 struct ipa_agg_replacement_value *aggvals); | |
| 558 void ipcp_grow_transformations_if_necessary (void); | |
| 0 | 559 |
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560 /* ipa_edge_args stores information related to a callsite and particularly its |
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561 arguments. It can be accessed by the IPA_EDGE_REF macro. */ |
| 111 | 562 |
| 563 class GTY((for_user)) ipa_edge_args | |
| 0 | 564 { |
| 111 | 565 public: |
| 566 | |
| 567 /* Default constructor. */ | |
| 568 ipa_edge_args () : jump_functions (NULL), polymorphic_call_contexts (NULL) | |
| 569 {} | |
| 570 | |
| 571 /* Destructor. */ | |
| 572 ~ipa_edge_args () | |
| 573 { | |
| 574 vec_free (jump_functions); | |
| 575 vec_free (polymorphic_call_contexts); | |
| 576 } | |
| 577 | |
| 578 /* Vectors of the callsite's jump function and polymorphic context | |
| 579 information of each parameter. */ | |
| 580 vec<ipa_jump_func, va_gc> *jump_functions; | |
| 581 vec<ipa_polymorphic_call_context, va_gc> *polymorphic_call_contexts; | |
| 582 }; | |
| 0 | 583 |
| 584 /* ipa_edge_args access functions. Please use these to access fields that | |
| 585 are or will be shared among various passes. */ | |
| 586 | |
| 587 /* Return the number of actual arguments. */ | |
| 588 | |
| 589 static inline int | |
| 590 ipa_get_cs_argument_count (struct ipa_edge_args *args) | |
| 591 { | |
| 111 | 592 return vec_safe_length (args->jump_functions); |
| 0 | 593 } |
| 594 | |
| 595 /* Returns a pointer to the jump function for the ith argument. Please note | |
| 596 there is no setter function as jump functions are all set up in | |
| 597 ipa_compute_jump_functions. */ | |
| 598 | |
| 599 static inline struct ipa_jump_func * | |
| 600 ipa_get_ith_jump_func (struct ipa_edge_args *args, int i) | |
| 601 { | |
| 111 | 602 return &(*args->jump_functions)[i]; |
| 603 } | |
| 604 | |
| 605 /* Returns a pointer to the polymorphic call context for the ith argument. | |
| 606 NULL if contexts are not computed. */ | |
| 607 static inline struct ipa_polymorphic_call_context * | |
| 608 ipa_get_ith_polymorhic_call_context (struct ipa_edge_args *args, int i) | |
| 609 { | |
| 610 if (!args->polymorphic_call_contexts) | |
| 611 return NULL; | |
| 612 return &(*args->polymorphic_call_contexts)[i]; | |
| 0 | 613 } |
| 614 | |
| 111 | 615 /* Function summary for ipa_node_params. */ |
| 616 class GTY((user)) ipa_node_params_t: public function_summary <ipa_node_params *> | |
| 617 { | |
| 618 public: | |
| 619 ipa_node_params_t (symbol_table *table, bool ggc): | |
| 620 function_summary<ipa_node_params *> (table, ggc) { } | |
| 621 | |
| 622 /* Hook that is called by summary when a node is duplicated. */ | |
| 623 virtual void duplicate (cgraph_node *node, | |
| 624 cgraph_node *node2, | |
| 625 ipa_node_params *data, | |
| 626 ipa_node_params *data2); | |
| 627 }; | |
| 628 | |
| 629 /* Summary to manange ipa_edge_args structures. */ | |
| 0 | 630 |
| 111 | 631 class GTY((user)) ipa_edge_args_sum_t : public call_summary <ipa_edge_args *> |
| 632 { | |
| 633 public: | |
| 634 ipa_edge_args_sum_t (symbol_table *table, bool ggc) | |
| 635 : call_summary<ipa_edge_args *> (table, ggc) { } | |
| 0 | 636 |
| 111 | 637 /* Hook that is called by summary when an edge is duplicated. */ |
| 638 virtual void remove (cgraph_edge *cs, ipa_edge_args *args); | |
| 639 /* Hook that is called by summary when an edge is duplicated. */ | |
| 640 virtual void duplicate (cgraph_edge *src, | |
| 641 cgraph_edge *dst, | |
| 642 ipa_edge_args *old_args, | |
| 643 ipa_edge_args *new_args); | |
| 644 }; | |
| 645 | |
| 646 /* Function summary where the parameter infos are actually stored. */ | |
| 647 extern GTY(()) ipa_node_params_t * ipa_node_params_sum; | |
| 648 /* Call summary to store information about edges such as jump functions. */ | |
| 649 extern GTY(()) ipa_edge_args_sum_t *ipa_edge_args_sum; | |
| 650 | |
| 651 /* Vector of IPA-CP transformation data for each clone. */ | |
| 652 extern GTY(()) vec<ipcp_transformation_summary, va_gc> *ipcp_transformations; | |
| 0 | 653 |
| 654 /* Return the associated parameter/argument info corresponding to the given | |
| 655 node/edge. */ | |
| 111 | 656 #define IPA_NODE_REF(NODE) (ipa_node_params_sum->get (NODE)) |
| 657 #define IPA_EDGE_REF(EDGE) (ipa_edge_args_sum->get (EDGE)) | |
| 0 | 658 /* This macro checks validity of index returned by |
| 659 ipa_get_param_decl_index function. */ | |
| 660 #define IS_VALID_JUMP_FUNC_INDEX(I) ((I) != -1) | |
| 661 | |
| 662 /* Creating and freeing ipa_node_params and ipa_edge_args. */ | |
| 663 void ipa_create_all_node_params (void); | |
| 664 void ipa_create_all_edge_args (void); | |
| 111 | 665 void ipa_check_create_edge_args (void); |
| 0 | 666 void ipa_free_edge_args_substructures (struct ipa_edge_args *); |
| 667 void ipa_free_all_node_params (void); | |
| 668 void ipa_free_all_edge_args (void); | |
|
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669 void ipa_free_all_structures_after_ipa_cp (void); |
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670 void ipa_free_all_structures_after_iinln (void); |
| 111 | 671 |
| 0 | 672 void ipa_register_cgraph_hooks (void); |
| 111 | 673 int count_formal_params (tree fndecl); |
| 0 | 674 |
| 675 /* This function ensures the array of node param infos is big enough to | |
| 676 accommodate a structure for all nodes and reallocates it if not. */ | |
| 677 | |
| 678 static inline void | |
| 679 ipa_check_create_node_params (void) | |
| 680 { | |
| 111 | 681 if (!ipa_node_params_sum) |
| 682 ipa_node_params_sum | |
| 683 = (new (ggc_cleared_alloc <ipa_node_params_t> ()) | |
| 684 ipa_node_params_t (symtab, true)); | |
| 0 | 685 } |
| 686 | |
| 111 | 687 /* Returns true if edge summary contains a record for EDGE. The main purpose |
| 688 of this function is that debug dumping function can check info availability | |
| 689 without causing allocations. */ | |
| 0 | 690 |
| 691 static inline bool | |
| 692 ipa_edge_args_info_available_for_edge_p (struct cgraph_edge *edge) | |
| 693 { | |
| 111 | 694 return ipa_edge_args_sum->exists (edge); |
| 0 | 695 } |
| 696 | |
| 111 | 697 static inline ipcp_transformation_summary * |
| 698 ipcp_get_transformation_summary (cgraph_node *node) | |
| 0 | 699 { |
| 111 | 700 if ((unsigned) node->uid >= vec_safe_length (ipcp_transformations)) |
| 701 return NULL; | |
| 702 return &(*ipcp_transformations)[node->uid]; | |
|
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703 } |
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704 |
| 111 | 705 /* Return the aggregate replacements for NODE, if there are any. */ |
| 706 | |
| 707 static inline struct ipa_agg_replacement_value * | |
| 708 ipa_get_agg_replacements_for_node (cgraph_node *node) | |
| 709 { | |
| 710 ipcp_transformation_summary *ts = ipcp_get_transformation_summary (node); | |
| 711 return ts ? ts->agg_values : NULL; | |
| 712 } | |
| 0 | 713 |
| 714 /* Function formal parameters related computations. */ | |
| 715 void ipa_initialize_node_params (struct cgraph_node *node); | |
| 716 bool ipa_propagate_indirect_call_infos (struct cgraph_edge *cs, | |
| 111 | 717 vec<cgraph_edge *> *new_edges); |
| 0 | 718 |
|
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719 /* Indirect edge and binfo processing. */ |
| 111 | 720 tree ipa_get_indirect_edge_target (struct cgraph_edge *ie, |
| 721 vec<tree> , | |
| 722 vec<ipa_polymorphic_call_context>, | |
| 723 vec<ipa_agg_jump_function_p>, | |
| 724 bool *); | |
|
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725 struct cgraph_edge *ipa_make_edge_direct_to_target (struct cgraph_edge *, tree, |
| 111 | 726 bool speculative = false); |
| 727 tree ipa_impossible_devirt_target (struct cgraph_edge *, tree); | |
| 728 ipa_bits *ipa_get_ipa_bits_for_value (const widest_int &value, | |
| 729 const widest_int &mask); | |
| 730 | |
| 731 | |
| 732 /* Functions related to both. */ | |
| 733 void ipa_analyze_node (struct cgraph_node *); | |
|
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734 |
| 111 | 735 /* Aggregate jump function related functions. */ |
| 736 tree ipa_find_agg_cst_for_param (struct ipa_agg_jump_function *agg, tree scalar, | |
| 737 HOST_WIDE_INT offset, bool by_ref, | |
| 738 bool *from_global_constant = NULL); | |
| 739 bool ipa_load_from_parm_agg (struct ipa_func_body_info *fbi, | |
| 740 vec<ipa_param_descriptor, va_gc> *descriptors, | |
| 741 gimple *stmt, tree op, int *index_p, | |
| 742 HOST_WIDE_INT *offset_p, HOST_WIDE_INT *size_p, | |
| 743 bool *by_ref, bool *guaranteed_unmodified = NULL); | |
|
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744 |
| 0 | 745 /* Debugging interface. */ |
| 746 void ipa_print_node_params (FILE *, struct cgraph_node *node); | |
| 747 void ipa_print_all_params (FILE *); | |
| 748 void ipa_print_node_jump_functions (FILE *f, struct cgraph_node *node); | |
| 749 void ipa_print_all_jump_functions (FILE * f); | |
| 111 | 750 void ipcp_verify_propagated_values (void); |
| 751 | |
| 752 template <typename value> | |
| 753 class ipcp_value; | |
| 754 | |
| 755 extern object_allocator<ipcp_value<tree> > ipcp_cst_values_pool; | |
| 756 extern object_allocator<ipcp_value<ipa_polymorphic_call_context> > | |
| 757 ipcp_poly_ctx_values_pool; | |
| 758 | |
| 759 template <typename valtype> | |
| 760 class ipcp_value_source; | |
| 761 | |
| 762 extern object_allocator<ipcp_value_source<tree> > ipcp_sources_pool; | |
| 763 | |
| 764 class ipcp_agg_lattice; | |
| 765 | |
| 766 extern object_allocator<ipcp_agg_lattice> ipcp_agg_lattice_pool; | |
| 767 | |
| 768 /* Operation to be performed for the parameter in ipa_parm_adjustment | |
| 769 below. */ | |
| 770 enum ipa_parm_op { | |
| 771 IPA_PARM_OP_NONE, | |
| 772 | |
| 773 /* This describes a brand new parameter. | |
| 774 | |
| 775 The field `type' should be set to the new type, `arg_prefix' | |
| 776 should be set to the string prefix for the new DECL_NAME, and | |
| 777 `new_decl' will ultimately hold the newly created argument. */ | |
| 778 IPA_PARM_OP_NEW, | |
| 779 | |
| 780 /* This new parameter is an unmodified parameter at index base_index. */ | |
| 781 IPA_PARM_OP_COPY, | |
| 782 | |
| 783 /* This adjustment describes a parameter that is about to be removed | |
| 784 completely. Most users will probably need to book keep those so that they | |
| 785 don't leave behinfd any non default def ssa names belonging to them. */ | |
| 786 IPA_PARM_OP_REMOVE | |
| 787 }; | |
| 0 | 788 |
|
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789 /* Structure to describe transformations of formal parameters and actual |
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790 arguments. Each instance describes one new parameter and they are meant to |
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791 be stored in a vector. Additionally, most users will probably want to store |
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792 adjustments about parameters that are being removed altogether so that SSA |
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793 names belonging to them can be replaced by SSA names of an artificial |
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794 variable. */ |
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795 struct ipa_parm_adjustment |
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796 { |
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797 /* The original PARM_DECL itself, helpful for processing of the body of the |
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798 function itself. Intended for traversing function bodies. |
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799 ipa_modify_formal_parameters, ipa_modify_call_arguments and |
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800 ipa_combine_adjustments ignore this and use base_index. |
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801 ipa_modify_formal_parameters actually sets this. */ |
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802 tree base; |
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803 |
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804 /* Type of the new parameter. However, if by_ref is true, the real type will |
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805 be a pointer to this type. */ |
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806 tree type; |
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807 |
|
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808 /* Alias refrerence type to be used in MEM_REFs when adjusting caller |
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809 arguments. */ |
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810 tree alias_ptr_type; |
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811 |
| 111 | 812 /* The new declaration when creating/replacing a parameter. Created |
| 813 by ipa_modify_formal_parameters, useful for functions modifying | |
| 814 the body accordingly. For brand new arguments, this is the newly | |
| 815 created argument. */ | |
| 816 tree new_decl; | |
|
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817 |
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818 /* New declaration of a substitute variable that we may use to replace all |
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819 non-default-def ssa names when a parm decl is going away. */ |
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820 tree new_ssa_base; |
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821 |
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822 /* If non-NULL and the original parameter is to be removed (copy_param below |
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823 is NULL), this is going to be its nonlocalized vars value. */ |
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824 tree nonlocal_value; |
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825 |
| 111 | 826 /* This holds the prefix to be used for the new DECL_NAME. */ |
| 827 const char *arg_prefix; | |
| 828 | |
|
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829 /* Offset into the original parameter (for the cases when the new parameter |
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830 is a component of an original one). */ |
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831 HOST_WIDE_INT offset; |
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832 |
| 111 | 833 /* Zero based index of the original parameter this one is based on. */ |
|
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834 int base_index; |
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835 |
| 111 | 836 /* Whether this parameter is a new parameter, a copy of an old one, |
| 837 or one about to be removed. */ | |
| 838 enum ipa_parm_op op; | |
|
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839 |
| 111 | 840 /* Storage order of the original parameter (for the cases when the new |
| 841 parameter is a component of an original one). */ | |
| 842 unsigned reverse : 1; | |
|
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843 |
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844 /* The parameter is to be passed by reference. */ |
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845 unsigned by_ref : 1; |
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846 }; |
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847 |
| 111 | 848 typedef vec<ipa_parm_adjustment> ipa_parm_adjustment_vec; |
|
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849 |
| 111 | 850 vec<tree> ipa_get_vector_of_formal_parms (tree fndecl); |
| 851 vec<tree> ipa_get_vector_of_formal_parm_types (tree fntype); | |
| 852 void ipa_modify_formal_parameters (tree fndecl, ipa_parm_adjustment_vec); | |
| 853 void ipa_modify_call_arguments (struct cgraph_edge *, gcall *, | |
|
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854 ipa_parm_adjustment_vec); |
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855 ipa_parm_adjustment_vec ipa_combine_adjustments (ipa_parm_adjustment_vec, |
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856 ipa_parm_adjustment_vec); |
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857 void ipa_dump_param_adjustments (FILE *, ipa_parm_adjustment_vec, tree); |
| 111 | 858 void ipa_dump_agg_replacement_values (FILE *f, |
| 859 struct ipa_agg_replacement_value *av); | |
| 860 void ipa_prop_write_jump_functions (void); | |
|
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861 void ipa_prop_read_jump_functions (void); |
| 111 | 862 void ipcp_write_transformation_summaries (void); |
| 863 void ipcp_read_transformation_summaries (void); | |
| 864 int ipa_get_param_decl_index (struct ipa_node_params *, tree); | |
| 865 tree ipa_value_from_jfunc (struct ipa_node_params *info, | |
| 866 struct ipa_jump_func *jfunc); | |
| 867 unsigned int ipcp_transform_function (struct cgraph_node *node); | |
| 868 ipa_polymorphic_call_context ipa_context_from_jfunc (ipa_node_params *, | |
| 869 cgraph_edge *, | |
| 870 int, | |
| 871 ipa_jump_func *); | |
| 872 void ipa_dump_param (FILE *, struct ipa_node_params *info, int i); | |
| 873 bool ipa_modify_expr (tree *, bool, ipa_parm_adjustment_vec); | |
| 874 ipa_parm_adjustment *ipa_get_adjustment_candidate (tree **, bool *, | |
| 875 ipa_parm_adjustment_vec, | |
| 876 bool); | |
| 877 void ipa_release_body_info (struct ipa_func_body_info *); | |
| 878 tree ipa_get_callee_param_type (struct cgraph_edge *e, int i); | |
|
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879 |
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880 /* From tree-sra.c: */ |
| 111 | 881 tree build_ref_for_offset (location_t, tree, HOST_WIDE_INT, bool, tree, |
|
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882 gimple_stmt_iterator *, bool); |
|
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883 |
| 111 | 884 /* In ipa-cp.c */ |
| 885 void ipa_cp_c_finalize (void); | |
| 886 | |
| 0 | 887 #endif /* IPA_PROP_H */ |