Mercurial > hg > CbC > CbC_gcc
annotate gcc/df.h @ 127:4c56639505ff
fix function.c and add CbC-example Makefile
| author | mir3636 |
|---|---|
| date | Wed, 11 Apr 2018 18:46:58 +0900 |
| parents | 04ced10e8804 |
| children | 84e7813d76e9 |
| rev | line source |
|---|---|
| 0 | 1 /* Form lists of pseudo register references for autoinc optimization |
| 2 for GNU compiler. This is part of flow optimization. | |
| 111 | 3 Copyright (C) 1999-2017 Free Software Foundation, Inc. |
|
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4 Originally contributed by Michael P. Hayes |
| 0 | 5 (m.hayes@elec.canterbury.ac.nz, mhayes@redhat.com) |
| 6 Major rewrite contributed by Danny Berlin (dberlin@dberlin.org) | |
| 7 and Kenneth Zadeck (zadeck@naturalbridge.com). | |
| 8 | |
| 9 This file is part of GCC. | |
| 10 | |
| 11 GCC is free software; you can redistribute it and/or modify it under | |
| 12 the terms of the GNU General Public License as published by the Free | |
| 13 Software Foundation; either version 3, or (at your option) any later | |
| 14 version. | |
| 15 | |
| 16 GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 17 WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 18 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 19 for more details. | |
| 20 | |
| 21 You should have received a copy of the GNU General Public License | |
| 22 along with GCC; see the file COPYING3. If not see | |
| 23 <http://www.gnu.org/licenses/>. */ | |
| 24 | |
| 25 #ifndef GCC_DF_H | |
| 26 #define GCC_DF_H | |
| 27 | |
|
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28 #include "regset.h" |
| 0 | 29 #include "alloc-pool.h" |
|
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30 #include "timevar.h" |
| 0 | 31 |
| 32 struct dataflow; | |
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33 struct df_d; |
| 0 | 34 struct df_problem; |
| 35 struct df_link; | |
| 36 struct df_insn_info; | |
| 37 union df_ref_d; | |
| 38 | |
|
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39 /* Data flow problems. All problems must have a unique id here. */ |
| 0 | 40 |
| 41 /* Scanning is not really a dataflow problem, but it is useful to have | |
| 42 the basic block functions in the vector so that things get done in | |
| 43 a uniform manner. The last four problems can be added or deleted | |
| 44 at any time are always defined (though LIVE is always there at -O2 | |
| 45 or higher); the others are always there. */ | |
| 111 | 46 enum df_problem_id |
| 47 { | |
| 48 DF_SCAN, | |
| 49 DF_LR, /* Live Registers backward. */ | |
| 50 DF_LIVE, /* Live Registers & Uninitialized Registers */ | |
| 51 DF_RD, /* Reaching Defs. */ | |
| 52 DF_CHAIN, /* Def-Use and/or Use-Def Chains. */ | |
| 53 DF_WORD_LR, /* Subreg tracking lr. */ | |
| 54 DF_NOTE, /* REG_DEAD and REG_UNUSED notes. */ | |
| 55 DF_MD, /* Multiple Definitions. */ | |
| 56 DF_MIR, /* Must-initialized Registers. */ | |
| 0 | 57 |
| 111 | 58 DF_LAST_PROBLEM_PLUS1 |
| 59 }; | |
| 0 | 60 |
| 61 /* Dataflow direction. */ | |
| 62 enum df_flow_dir | |
| 63 { | |
| 64 DF_NONE, | |
| 65 DF_FORWARD, | |
| 66 DF_BACKWARD | |
| 67 }; | |
| 68 | |
| 69 /* Descriminator for the various df_ref types. */ | |
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70 enum df_ref_class {DF_REF_BASE, DF_REF_ARTIFICIAL, DF_REF_REGULAR}; |
| 0 | 71 |
| 72 /* The first of these us a set of a registers. The remaining three | |
| 73 are all uses of a register (the mem_load and mem_store relate to | |
| 74 how the register as an addressing operand). */ | |
| 75 enum df_ref_type {DF_REF_REG_DEF, DF_REF_REG_USE, | |
| 76 DF_REF_REG_MEM_LOAD, DF_REF_REG_MEM_STORE}; | |
| 77 | |
| 78 enum df_ref_flags | |
| 79 { | |
| 80 /* This flag is set if this ref occurs inside of a conditional | |
| 81 execution instruction. */ | |
| 82 DF_REF_CONDITIONAL = 1 << 0, | |
| 83 | |
| 84 /* If this flag is set for an artificial use or def, that ref | |
| 85 logically happens at the top of the block. If it is not set | |
| 86 for an artificial use or def, that ref logically happens at the | |
| 87 bottom of the block. This is never set for regular refs. */ | |
| 88 DF_REF_AT_TOP = 1 << 1, | |
| 89 | |
| 90 /* This flag is set if the use is inside a REG_EQUAL or REG_EQUIV | |
| 91 note. */ | |
| 92 DF_REF_IN_NOTE = 1 << 2, | |
| 93 | |
| 94 /* This bit is true if this ref can make regs_ever_live true for | |
| 95 this regno. */ | |
| 96 DF_HARD_REG_LIVE = 1 << 3, | |
| 97 | |
| 98 | |
| 99 /* This flag is set if this ref is a partial use or def of the | |
| 100 associated register. */ | |
| 101 DF_REF_PARTIAL = 1 << 4, | |
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102 |
| 0 | 103 /* Read-modify-write refs generate both a use and a def and |
| 104 these are marked with this flag to show that they are not | |
| 105 independent. */ | |
| 106 DF_REF_READ_WRITE = 1 << 5, | |
| 107 | |
| 108 /* This flag is set if this ref, generally a def, may clobber the | |
| 109 referenced register. This is generally only set for hard | |
| 110 registers that cross a call site. With better information | |
| 111 about calls, some of these could be changed in the future to | |
| 112 DF_REF_MUST_CLOBBER. */ | |
| 113 DF_REF_MAY_CLOBBER = 1 << 6, | |
| 114 | |
| 115 /* This flag is set if this ref, generally a def, is a real | |
| 116 clobber. This is not currently set for registers live across a | |
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117 call because that clobbering may or may not happen. |
| 0 | 118 |
| 119 Most of the uses of this are with sets that have a | |
| 120 GET_CODE(..)==CLOBBER. Note that this is set even if the | |
| 121 clobber is to a subreg. So in order to tell if the clobber | |
| 122 wipes out the entire register, it is necessary to also check | |
| 123 the DF_REF_PARTIAL flag. */ | |
| 124 DF_REF_MUST_CLOBBER = 1 << 7, | |
| 125 | |
| 126 | |
| 127 /* If the ref has one of the following two flags set, then the | |
| 128 struct df_ref can be cast to struct df_ref_extract to access | |
| 129 the width and offset fields. */ | |
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130 |
| 0 | 131 /* This flag is set if the ref contains a SIGN_EXTRACT. */ |
| 132 DF_REF_SIGN_EXTRACT = 1 << 8, | |
| 133 | |
| 134 /* This flag is set if the ref contains a ZERO_EXTRACT. */ | |
| 135 DF_REF_ZERO_EXTRACT = 1 << 9, | |
| 136 | |
| 137 /* This flag is set if the ref contains a STRICT_LOW_PART. */ | |
| 138 DF_REF_STRICT_LOW_PART = 1 << 10, | |
| 139 | |
| 140 /* This flag is set if the ref contains a SUBREG. */ | |
| 141 DF_REF_SUBREG = 1 << 11, | |
| 142 | |
| 143 | |
| 144 /* This bit is true if this ref is part of a multiword hardreg. */ | |
| 145 DF_REF_MW_HARDREG = 1 << 12, | |
| 146 | |
| 147 /* This flag is set if this ref is a usage of the stack pointer by | |
| 148 a function call. */ | |
| 149 DF_REF_CALL_STACK_USAGE = 1 << 13, | |
| 150 | |
| 151 /* This flag is used for verification of existing refs. */ | |
| 152 DF_REF_REG_MARKER = 1 << 14, | |
| 153 | |
| 154 /* This flag is set if this ref is inside a pre/post modify. */ | |
| 155 DF_REF_PRE_POST_MODIFY = 1 << 15 | |
| 156 | |
| 157 }; | |
| 158 | |
| 159 /* The possible ordering of refs within the df_ref_info. */ | |
| 160 enum df_ref_order | |
| 161 { | |
|
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162 /* There is not table. */ |
| 0 | 163 DF_REF_ORDER_NO_TABLE, |
| 164 | |
| 165 /* There is a table of refs but it is not (or no longer) organized | |
| 166 by one of the following methods. */ | |
| 167 DF_REF_ORDER_UNORDERED, | |
| 168 DF_REF_ORDER_UNORDERED_WITH_NOTES, | |
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169 |
| 0 | 170 /* Organize the table by reg order, all of the refs with regno 0 |
| 171 followed by all of the refs with regno 1 ... . Within all of | |
| 172 the regs for a particular regno, the refs are unordered. */ | |
| 173 DF_REF_ORDER_BY_REG, | |
| 174 | |
| 175 /* For uses, the refs within eq notes may be added for | |
| 176 DF_REF_ORDER_BY_REG. */ | |
| 177 DF_REF_ORDER_BY_REG_WITH_NOTES, | |
| 178 | |
| 179 /* Organize the refs in insn order. The insns are ordered within a | |
| 111 | 180 block, and the blocks are ordered by FOR_ALL_BB_FN. */ |
| 0 | 181 DF_REF_ORDER_BY_INSN, |
| 182 | |
| 183 /* For uses, the refs within eq notes may be added for | |
| 184 DF_REF_ORDER_BY_INSN. */ | |
| 185 DF_REF_ORDER_BY_INSN_WITH_NOTES | |
| 186 }; | |
| 187 | |
| 188 /* Function prototypes added to df_problem instance. */ | |
| 189 | |
| 190 /* Allocate the problem specific data. */ | |
| 191 typedef void (*df_alloc_function) (bitmap); | |
| 192 | |
| 193 /* This function is called if the problem has global data that needs | |
| 194 to be cleared when ever the set of blocks changes. The bitmap | |
| 195 contains the set of blocks that may require special attention. | |
| 196 This call is only made if some of the blocks are going to change. | |
| 197 If everything is to be deleted, the wholesale deletion mechanisms | |
| 198 apply. */ | |
| 199 typedef void (*df_reset_function) (bitmap); | |
| 200 | |
| 201 /* Free the basic block info. Called from the block reordering code | |
| 202 to get rid of the blocks that have been squished down. */ | |
| 203 typedef void (*df_free_bb_function) (basic_block, void *); | |
| 204 | |
| 205 /* Local compute function. */ | |
| 206 typedef void (*df_local_compute_function) (bitmap); | |
| 207 | |
| 208 /* Init the solution specific data. */ | |
| 209 typedef void (*df_init_function) (bitmap); | |
| 210 | |
| 211 /* Iterative dataflow function. */ | |
| 212 typedef void (*df_dataflow_function) (struct dataflow *, bitmap, int *, int); | |
| 213 | |
| 214 /* Confluence operator for blocks with 0 out (or in) edges. */ | |
| 215 typedef void (*df_confluence_function_0) (basic_block); | |
| 216 | |
|
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217 /* Confluence operator for blocks with 1 or more out (or in) edges. |
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218 Return true if BB input data has changed. */ |
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219 typedef bool (*df_confluence_function_n) (edge); |
| 0 | 220 |
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221 /* Transfer function for blocks. |
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222 Return true if BB output data has changed. */ |
| 0 | 223 typedef bool (*df_transfer_function) (int); |
| 224 | |
| 225 /* Function to massage the information after the problem solving. */ | |
| 226 typedef void (*df_finalizer_function) (bitmap); | |
| 227 | |
| 228 /* Function to free all of the problem specific datastructures. */ | |
| 229 typedef void (*df_free_function) (void); | |
| 230 | |
| 231 /* Function to remove this problem from the stack of dataflow problems | |
| 232 without effecting the other problems in the stack except for those | |
| 233 that depend on this problem. */ | |
| 234 typedef void (*df_remove_problem_function) (void); | |
| 235 | |
| 236 /* Function to dump basic block independent results to FILE. */ | |
| 237 typedef void (*df_dump_problem_function) (FILE *); | |
| 238 | |
| 239 /* Function to dump top or bottom of basic block results to FILE. */ | |
| 240 typedef void (*df_dump_bb_problem_function) (basic_block, FILE *); | |
| 241 | |
| 111 | 242 /* Function to dump before or after an insn to FILE. */ |
| 243 typedef void (*df_dump_insn_problem_function) (const rtx_insn *, FILE *); | |
| 244 | |
| 0 | 245 /* Function to dump top or bottom of basic block results to FILE. */ |
| 246 typedef void (*df_verify_solution_start) (void); | |
| 247 | |
| 248 /* Function to dump top or bottom of basic block results to FILE. */ | |
| 249 typedef void (*df_verify_solution_end) (void); | |
| 250 | |
| 251 /* The static description of a dataflow problem to solve. See above | |
| 252 typedefs for doc for the function fields. */ | |
| 253 | |
| 254 struct df_problem { | |
| 255 /* The unique id of the problem. This is used it index into | |
| 256 df->defined_problems to make accessing the problem data easy. */ | |
| 111 | 257 enum df_problem_id id; |
| 0 | 258 enum df_flow_dir dir; /* Dataflow direction. */ |
| 259 df_alloc_function alloc_fun; | |
| 260 df_reset_function reset_fun; | |
| 261 df_free_bb_function free_bb_fun; | |
| 262 df_local_compute_function local_compute_fun; | |
| 263 df_init_function init_fun; | |
| 264 df_dataflow_function dataflow_fun; | |
| 265 df_confluence_function_0 con_fun_0; | |
| 266 df_confluence_function_n con_fun_n; | |
| 267 df_transfer_function trans_fun; | |
| 268 df_finalizer_function finalize_fun; | |
| 269 df_free_function free_fun; | |
| 270 df_remove_problem_function remove_problem_fun; | |
| 271 df_dump_problem_function dump_start_fun; | |
| 272 df_dump_bb_problem_function dump_top_fun; | |
| 273 df_dump_bb_problem_function dump_bottom_fun; | |
| 111 | 274 df_dump_insn_problem_function dump_insn_top_fun; |
| 275 df_dump_insn_problem_function dump_insn_bottom_fun; | |
| 0 | 276 df_verify_solution_start verify_start_fun; |
| 277 df_verify_solution_end verify_end_fun; | |
| 111 | 278 const struct df_problem *dependent_problem; |
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279 unsigned int block_info_elt_size; |
| 0 | 280 |
| 281 /* The timevar id associated with this pass. */ | |
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282 timevar_id_t tv_id; |
| 0 | 283 |
| 284 /* True if the df_set_blocks should null out the basic block info if | |
| 285 this block drops out of df->blocks_to_analyze. */ | |
| 286 bool free_blocks_on_set_blocks; | |
| 287 }; | |
| 288 | |
| 289 | |
| 290 /* The specific instance of the problem to solve. */ | |
| 291 struct dataflow | |
| 292 { | |
| 111 | 293 const struct df_problem *problem; /* The problem to be solved. */ |
| 0 | 294 |
| 295 /* Array indexed by bb->index, that contains basic block problem and | |
| 296 solution specific information. */ | |
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297 void *block_info; |
| 0 | 298 unsigned int block_info_size; |
| 299 | |
| 300 /* The pool to allocate the block_info from. */ | |
| 111 | 301 object_allocator<df_link> *block_pool; |
| 0 | 302 |
| 303 /* The lr and live problems have their transfer functions recomputed | |
| 304 only if necessary. This is possible for them because, the | |
| 305 problems are kept active for the entire backend and their | |
| 306 transfer functions are indexed by the REGNO. These are not | |
| 307 defined for any other problem. */ | |
| 308 bitmap out_of_date_transfer_functions; | |
| 309 | |
| 310 /* Other problem specific data that is not on a per basic block | |
| 311 basis. The structure is generally defined privately for the | |
| 312 problem. The exception being the scanning problem where it is | |
| 313 fully public. */ | |
| 314 void *problem_data; | |
| 315 | |
| 316 /* Local flags for some of the problems. */ | |
| 317 unsigned int local_flags; | |
|
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318 |
| 0 | 319 /* True if this problem of this instance has been initialized. This |
| 320 is used by the dumpers to keep garbage out of the dumps if, for | |
| 321 debugging a dump is produced before the first call to | |
| 322 df_analyze after a new problem is added. */ | |
| 323 bool computed; | |
| 324 | |
| 325 /* True if the something has changed which invalidates the dataflow | |
|
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326 solutions. Note that this bit is always true for all problems except |
| 0 | 327 lr and live. */ |
| 328 bool solutions_dirty; | |
| 329 | |
| 330 /* If true, this pass is deleted by df_finish_pass. This is never | |
| 331 true for DF_SCAN and DF_LR. It is true for DF_LIVE if optimize > | |
| 332 1. It is always true for the other problems. */ | |
| 333 bool optional_p; | |
| 334 }; | |
| 335 | |
| 336 | |
| 337 /* The set of multiword hardregs used as operands to this | |
| 338 instruction. These are factored into individual uses and defs but | |
| 339 the aggregate is still needed to service the REG_DEAD and | |
| 340 REG_UNUSED notes. */ | |
| 341 struct df_mw_hardreg | |
| 342 { | |
| 111 | 343 df_mw_hardreg *next; /* Next entry for this instruction. */ |
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344 rtx mw_reg; /* The multiword hardreg. */ |
| 0 | 345 /* These two bitfields are intentionally oversized, in the hope that |
| 346 accesses to 16-bit fields will usually be quicker. */ | |
| 347 ENUM_BITFIELD(df_ref_type) type : 16; | |
| 348 /* Used to see if the ref is read or write. */ | |
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349 int flags : 16; /* Various df_ref_flags. */ |
| 0 | 350 unsigned int start_regno; /* First word of the multi word subreg. */ |
| 351 unsigned int end_regno; /* Last word of the multi word subreg. */ | |
| 352 unsigned int mw_order; /* Same as df_ref.ref_order. */ | |
| 353 }; | |
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354 |
| 0 | 355 |
| 356 /* Define a register reference structure. One of these is allocated | |
| 357 for every register reference (use or def). Note some register | |
| 358 references (e.g., post_inc, subreg) generate both a def and a use. */ | |
| 359 struct df_base_ref | |
| 360 { | |
| 361 /* These three bitfields are intentionally oversized, in the hope that | |
| 362 accesses to 8 and 16-bit fields will usually be quicker. */ | |
| 363 ENUM_BITFIELD(df_ref_class) cl : 8; | |
| 364 | |
| 365 ENUM_BITFIELD(df_ref_type) type : 8; | |
| 366 /* Type of ref. */ | |
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367 int flags : 16; /* Various df_ref_flags. */ |
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368 unsigned int regno; /* The register number referenced. */ |
| 0 | 369 rtx reg; /* The register referenced. */ |
| 111 | 370 union df_ref_d *next_loc; /* Next ref for same insn or bb. */ |
| 0 | 371 struct df_link *chain; /* Head of def-use, use-def. */ |
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372 /* Pointer to the insn info of the containing instruction. FIXME! |
| 0 | 373 Currently this is NULL for artificial refs but this will be used |
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374 when FUDs are added. */ |
| 0 | 375 struct df_insn_info *insn_info; |
| 376 /* For each regno, there are three chains of refs, one for the uses, | |
| 111 | 377 the eq_uses and the defs. These chains go through the refs |
| 0 | 378 themselves rather than using an external structure. */ |
| 379 union df_ref_d *next_reg; /* Next ref with same regno and type. */ | |
| 380 union df_ref_d *prev_reg; /* Prev ref with same regno and type. */ | |
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381 /* Location in the ref table. This is only valid after a call to |
| 0 | 382 df_maybe_reorganize_[use,def]_refs which is an expensive operation. */ |
| 383 int id; | |
| 384 /* The index at which the operand was scanned in the insn. This is | |
| 385 used to totally order the refs in an insn. */ | |
| 386 unsigned int ref_order; | |
| 387 }; | |
| 388 | |
| 389 | |
| 390 /* The three types of df_refs. Note that the df_ref_extract is an | |
|
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391 extension of the df_regular_ref, not the df_base_ref. */ |
| 0 | 392 struct df_artificial_ref |
| 393 { | |
| 394 struct df_base_ref base; | |
| 395 | |
| 396 /* Artificial refs do not have an insn, so to get the basic block, | |
| 397 it must be explicitly here. */ | |
| 398 basic_block bb; | |
| 399 }; | |
| 400 | |
| 401 | |
| 402 struct df_regular_ref | |
| 403 { | |
| 404 struct df_base_ref base; | |
| 405 /* The loc is the address in the insn of the reg. This is not | |
| 406 defined for special registers, such as clobbers and stack | |
| 407 pointers that are also associated with call insns and so those | |
| 408 just use the base. */ | |
| 409 rtx *loc; | |
| 410 }; | |
| 411 | |
| 412 /* Union of the different kinds of defs/uses placeholders. */ | |
| 413 union df_ref_d | |
| 414 { | |
| 415 struct df_base_ref base; | |
| 416 struct df_regular_ref regular_ref; | |
| 417 struct df_artificial_ref artificial_ref; | |
| 418 }; | |
| 419 typedef union df_ref_d *df_ref; | |
| 420 | |
| 421 | |
| 422 /* One of these structures is allocated for every insn. */ | |
| 423 struct df_insn_info | |
| 424 { | |
| 111 | 425 rtx_insn *insn; /* The insn this info comes from. */ |
| 426 df_ref defs; /* Head of insn-def chain. */ | |
| 427 df_ref uses; /* Head of insn-use chain. */ | |
| 0 | 428 /* Head of insn-use chain for uses in REG_EQUAL/EQUIV notes. */ |
| 111 | 429 df_ref eq_uses; |
| 430 struct df_mw_hardreg *mw_hardregs; | |
| 0 | 431 /* The logical uid of the insn in the basic block. This is valid |
| 432 after any call to df_analyze but may rot after insns are added, | |
| 433 deleted or moved. */ | |
|
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434 int luid; |
| 0 | 435 }; |
|
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436 |
| 0 | 437 /* These links are used for ref-ref chains. Currently only DEF-USE and |
| 438 USE-DEF chains can be built by DF. */ | |
| 439 struct df_link | |
| 440 { | |
| 441 df_ref ref; | |
| 442 struct df_link *next; | |
| 443 }; | |
| 444 | |
| 445 | |
| 446 enum df_chain_flags | |
| 447 { | |
| 448 /* Flags that control the building of chains. */ | |
|
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449 DF_DU_CHAIN = 1, /* Build DU chains. */ |
| 0 | 450 DF_UD_CHAIN = 2 /* Build UD chains. */ |
| 451 }; | |
| 452 | |
| 111 | 453 enum df_scan_flags |
| 454 { | |
| 455 /* Flags for the SCAN problem. */ | |
| 456 DF_SCAN_EMPTY_ENTRY_EXIT = 1 /* Don't define any registers in the entry | |
| 457 block; don't use any in the exit block. */ | |
| 458 }; | |
| 459 | |
|
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460 enum df_changeable_flags |
| 0 | 461 { |
| 462 /* Scanning flags. */ | |
| 463 /* Flag to control the running of dce as a side effect of building LR. */ | |
| 464 DF_LR_RUN_DCE = 1 << 0, /* Run DCE. */ | |
| 465 DF_NO_HARD_REGS = 1 << 1, /* Skip hard registers in RD and CHAIN Building. */ | |
| 466 | |
| 467 DF_EQ_NOTES = 1 << 2, /* Build chains with uses present in EQUIV/EQUAL notes. */ | |
| 468 DF_NO_REGS_EVER_LIVE = 1 << 3, /* Do not compute the regs_ever_live. */ | |
| 469 | |
| 470 /* Cause df_insn_rescan df_notes_rescan and df_insn_delete, to | |
| 471 return immediately. This is used by passes that know how to update | |
| 472 the scanning them selves. */ | |
| 473 DF_NO_INSN_RESCAN = 1 << 4, | |
| 474 | |
| 475 /* Cause df_insn_rescan df_notes_rescan and df_insn_delete, to | |
| 476 return after marking the insn for later processing. This allows all | |
| 477 rescans to be batched. */ | |
| 478 DF_DEFER_INSN_RESCAN = 1 << 5, | |
| 479 | |
| 111 | 480 /* Compute the reaching defs problem as "live and reaching defs" (LR&RD). |
| 481 A DEF is reaching and live at insn I if DEF reaches I and REGNO(DEF) | |
| 482 is in LR_IN of the basic block containing I. */ | |
| 483 DF_RD_PRUNE_DEAD_DEFS = 1 << 6, | |
| 484 | |
| 485 DF_VERIFY_SCHEDULED = 1 << 7 | |
| 0 | 486 }; |
| 487 | |
| 488 /* Two of these structures are inline in df, one for the uses and one | |
| 489 for the defs. This structure is only contains the refs within the | |
| 490 boundary of the df_set_blocks if that has been defined. */ | |
| 491 struct df_ref_info | |
| 492 { | |
| 493 df_ref *refs; /* Ref table, indexed by id. */ | |
| 494 unsigned int *begin; /* First ref_index for this pseudo. */ | |
| 495 unsigned int *count; /* Count of refs for this pseudo. */ | |
| 496 unsigned int refs_size; /* Size of currently allocated refs table. */ | |
| 497 | |
| 498 /* Table_size is the number of elements in the refs table. This | |
| 499 will also be the width of the bitvectors in the rd and ru | |
| 500 problems. Total_size is the number of refs. These will be the | |
| 501 same if the focus has not been reduced by df_set_blocks. If the | |
| 502 focus has been reduced, table_size will be smaller since it only | |
| 503 contains the refs in the set blocks. */ | |
| 504 unsigned int table_size; | |
| 505 unsigned int total_size; | |
| 506 | |
| 507 enum df_ref_order ref_order; | |
| 508 }; | |
| 509 | |
| 510 /* Three of these structures are allocated for every pseudo reg. One | |
| 511 for the uses, one for the eq_uses and one for the defs. */ | |
| 512 struct df_reg_info | |
| 513 { | |
| 514 /* Head of chain for refs of that type and regno. */ | |
| 515 df_ref reg_chain; | |
| 516 /* Number of refs in the chain. */ | |
| 517 unsigned int n_refs; | |
| 518 }; | |
| 519 | |
| 520 | |
| 521 /*---------------------------------------------------------------------------- | |
| 522 Problem data for the scanning dataflow problem. Unlike the other | |
| 523 dataflow problems, the problem data for scanning is fully exposed and | |
| 524 used by owners of the problem. | |
| 525 ----------------------------------------------------------------------------*/ | |
| 526 | |
|
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527 struct df_d |
| 0 | 528 { |
| 529 | |
| 530 /* The set of problems to be solved is stored in two arrays. In | |
| 531 PROBLEMS_IN_ORDER, the problems are stored in the order that they | |
| 532 are solved. This is an internally dense array that may have | |
| 533 nulls at the end of it. In PROBLEMS_BY_INDEX, the problem is | |
| 534 stored by the value in df_problem.id. These are used to access | |
| 535 the problem local data without having to search the first | |
| 536 array. */ | |
| 537 | |
|
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538 struct dataflow *problems_in_order[DF_LAST_PROBLEM_PLUS1]; |
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539 struct dataflow *problems_by_index[DF_LAST_PROBLEM_PLUS1]; |
| 0 | 540 |
| 541 /* If not NULL, this subset of blocks of the program to be | |
| 542 considered for analysis. At certain times, this will contain all | |
| 543 the blocks in the function so it cannot be used as an indicator | |
|
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544 of if we are analyzing a subset. See analyze_subset. */ |
| 0 | 545 bitmap blocks_to_analyze; |
| 546 | |
| 547 /* The following information is really the problem data for the | |
| 548 scanning instance but it is used too often by the other problems | |
| 549 to keep getting it from there. */ | |
| 550 struct df_ref_info def_info; /* Def info. */ | |
| 551 struct df_ref_info use_info; /* Use info. */ | |
| 552 | |
| 553 /* The following three arrays are allocated in parallel. They contain | |
| 554 the sets of refs of each type for each reg. */ | |
| 555 struct df_reg_info **def_regs; /* Def reg info. */ | |
| 556 struct df_reg_info **use_regs; /* Eq_use reg info. */ | |
| 557 struct df_reg_info **eq_use_regs; /* Eq_use info. */ | |
| 558 unsigned int regs_size; /* Size of currently allocated regs table. */ | |
| 559 unsigned int regs_inited; /* Number of regs with reg_infos allocated. */ | |
| 560 | |
| 561 | |
| 562 struct df_insn_info **insns; /* Insn table, indexed by insn UID. */ | |
| 563 unsigned int insns_size; /* Size of insn table. */ | |
| 564 | |
| 565 int num_problems_defined; | |
| 566 | |
|
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567 bitmap_head hardware_regs_used; /* The set of hardware registers used. */ |
| 0 | 568 /* The set of hard regs that are in the artificial uses at the end |
| 569 of a regular basic block. */ | |
|
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570 bitmap_head regular_block_artificial_uses; |
| 0 | 571 /* The set of hard regs that are in the artificial uses at the end |
| 572 of a basic block that has an EH pred. */ | |
|
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573 bitmap_head eh_block_artificial_uses; |
| 0 | 574 /* The set of hardware registers live on entry to the function. */ |
| 575 bitmap entry_block_defs; | |
| 576 bitmap exit_block_uses; /* The set of hardware registers used in exit block. */ | |
| 577 | |
| 578 /* Insns to delete, rescan or reprocess the notes at next | |
| 579 df_rescan_all or df_process_deferred_rescans. */ | |
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580 bitmap_head insns_to_delete; |
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581 bitmap_head insns_to_rescan; |
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582 bitmap_head insns_to_notes_rescan; |
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583 int *postorder; /* The current set of basic blocks |
| 0 | 584 in reverse postorder. */ |
| 111 | 585 vec<int> postorder_inverted; /* The current set of basic blocks |
| 0 | 586 in reverse postorder of inverted CFG. */ |
| 587 int n_blocks; /* The number of blocks in reverse postorder. */ | |
| 588 | |
| 589 /* An array [FIRST_PSEUDO_REGISTER], indexed by regno, of the number | |
| 590 of refs that qualify as being real hard regs uses. Artificial | |
| 591 uses and defs as well as refs in eq notes are ignored. If the | |
| 592 ref is a def, it cannot be a MAY_CLOBBER def. If the ref is a | |
| 593 use, it cannot be the emim_reg_set or be the frame or arg pointer | |
| 111 | 594 register. Uses in debug insns are ignored. |
| 0 | 595 |
| 596 IT IS NOT ACCEPTABLE TO MANUALLY CHANGE THIS ARRAY. This array | |
| 597 always reflects the actual number of refs in the insn stream that | |
| 598 satisfy the above criteria. */ | |
| 599 unsigned int *hard_regs_live_count; | |
| 600 | |
| 601 /* This counter provides a way to totally order refs without using | |
| 602 addresses. It is incremented whenever a ref is created. */ | |
| 603 unsigned int ref_order; | |
| 604 | |
|
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605 /* Problem specific control information. This is a combination of |
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606 enum df_changeable_flags values. */ |
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607 int changeable_flags : 8; |
| 0 | 608 |
| 609 /* If this is true, then only a subset of the blocks of the program | |
| 610 is considered to compute the solutions of dataflow problems. */ | |
| 611 bool analyze_subset; | |
| 612 | |
| 613 /* True if someone added or deleted something from regs_ever_live so | |
| 614 that the entry and exit blocks need be reprocessed. */ | |
| 615 bool redo_entry_and_exit; | |
| 616 }; | |
| 617 | |
| 111 | 618 #define DF_SCAN_BB_INFO(BB) (df_scan_get_bb_info ((BB)->index)) |
| 619 #define DF_RD_BB_INFO(BB) (df_rd_get_bb_info ((BB)->index)) | |
| 620 #define DF_LR_BB_INFO(BB) (df_lr_get_bb_info ((BB)->index)) | |
| 621 #define DF_LIVE_BB_INFO(BB) (df_live_get_bb_info ((BB)->index)) | |
| 622 #define DF_WORD_LR_BB_INFO(BB) (df_word_lr_get_bb_info ((BB)->index)) | |
| 623 #define DF_MD_BB_INFO(BB) (df_md_get_bb_info ((BB)->index)) | |
| 624 #define DF_MIR_BB_INFO(BB) (df_mir_get_bb_info ((BB)->index)) | |
| 0 | 625 |
| 626 /* Most transformations that wish to use live register analysis will | |
| 627 use these macros. This info is the and of the lr and live sets. */ | |
| 111 | 628 #define DF_LIVE_IN(BB) (&DF_LIVE_BB_INFO (BB)->in) |
| 629 #define DF_LIVE_OUT(BB) (&DF_LIVE_BB_INFO (BB)->out) | |
| 630 | |
| 631 #define DF_MIR_IN(BB) (&DF_MIR_BB_INFO (BB)->in) | |
| 632 #define DF_MIR_OUT(BB) (&DF_MIR_BB_INFO (BB)->out) | |
| 0 | 633 |
| 634 /* These macros are used by passes that are not tolerant of | |
| 635 uninitialized variables. This intolerance should eventually | |
| 636 be fixed. */ | |
| 111 | 637 #define DF_LR_IN(BB) (&DF_LR_BB_INFO (BB)->in) |
| 638 #define DF_LR_OUT(BB) (&DF_LR_BB_INFO (BB)->out) | |
| 0 | 639 |
| 640 /* These macros are used by passes that are not tolerant of | |
| 641 uninitialized variables. This intolerance should eventually | |
| 642 be fixed. */ | |
| 111 | 643 #define DF_WORD_LR_IN(BB) (&DF_WORD_LR_BB_INFO (BB)->in) |
| 644 #define DF_WORD_LR_OUT(BB) (&DF_WORD_LR_BB_INFO (BB)->out) | |
| 0 | 645 |
| 646 /* Macros to access the elements within the ref structure. */ | |
| 647 | |
| 648 | |
| 649 #define DF_REF_REAL_REG(REF) (GET_CODE ((REF)->base.reg) == SUBREG \ | |
| 650 ? SUBREG_REG ((REF)->base.reg) : ((REF)->base.reg)) | |
| 651 #define DF_REF_REGNO(REF) ((REF)->base.regno) | |
| 652 #define DF_REF_REAL_LOC(REF) (GET_CODE (*((REF)->regular_ref.loc)) == SUBREG \ | |
| 653 ? &SUBREG_REG (*((REF)->regular_ref.loc)) : ((REF)->regular_ref.loc)) | |
| 654 #define DF_REF_REG(REF) ((REF)->base.reg) | |
| 111 | 655 #define DF_REF_LOC(REF) (DF_REF_CLASS (REF) == DF_REF_REGULAR ? \ |
| 0 | 656 (REF)->regular_ref.loc : NULL) |
| 111 | 657 #define DF_REF_BB(REF) (DF_REF_IS_ARTIFICIAL (REF) \ |
| 658 ? (REF)->artificial_ref.bb \ | |
| 659 : BLOCK_FOR_INSN (DF_REF_INSN (REF))) | |
| 0 | 660 #define DF_REF_BBNO(REF) (DF_REF_BB (REF)->index) |
| 661 #define DF_REF_INSN_INFO(REF) ((REF)->base.insn_info) | |
| 662 #define DF_REF_INSN(REF) ((REF)->base.insn_info->insn) | |
| 663 #define DF_REF_INSN_UID(REF) (INSN_UID (DF_REF_INSN(REF))) | |
| 664 #define DF_REF_CLASS(REF) ((REF)->base.cl) | |
| 665 #define DF_REF_TYPE(REF) ((REF)->base.type) | |
| 666 #define DF_REF_CHAIN(REF) ((REF)->base.chain) | |
| 667 #define DF_REF_ID(REF) ((REF)->base.id) | |
| 668 #define DF_REF_FLAGS(REF) ((REF)->base.flags) | |
| 669 #define DF_REF_FLAGS_IS_SET(REF, v) ((DF_REF_FLAGS (REF) & (v)) != 0) | |
| 670 #define DF_REF_FLAGS_SET(REF, v) (DF_REF_FLAGS (REF) |= (v)) | |
| 671 #define DF_REF_FLAGS_CLEAR(REF, v) (DF_REF_FLAGS (REF) &= ~(v)) | |
| 672 #define DF_REF_ORDER(REF) ((REF)->base.ref_order) | |
| 673 /* If DF_REF_IS_ARTIFICIAL () is true, this is not a real | |
| 674 definition/use, but an artificial one created to model always live | |
| 675 registers, eh uses, etc. */ | |
| 111 | 676 #define DF_REF_IS_ARTIFICIAL(REF) (DF_REF_CLASS (REF) == DF_REF_ARTIFICIAL) |
| 0 | 677 #define DF_REF_REG_MARK(REF) (DF_REF_FLAGS_SET ((REF),DF_REF_REG_MARKER)) |
| 678 #define DF_REF_REG_UNMARK(REF) (DF_REF_FLAGS_CLEAR ((REF),DF_REF_REG_MARKER)) | |
| 679 #define DF_REF_IS_REG_MARKED(REF) (DF_REF_FLAGS_IS_SET ((REF),DF_REF_REG_MARKER)) | |
| 111 | 680 #define DF_REF_NEXT_LOC(REF) ((REF)->base.next_loc) |
| 0 | 681 #define DF_REF_NEXT_REG(REF) ((REF)->base.next_reg) |
| 682 #define DF_REF_PREV_REG(REF) ((REF)->base.prev_reg) | |
|
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683 /* The following two macros may only be applied if one of |
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684 DF_REF_SIGN_EXTRACT | DF_REF_ZERO_EXTRACT is true. */ |
| 0 | 685 #define DF_REF_EXTRACT_WIDTH(REF) ((REF)->extract_ref.width) |
| 686 #define DF_REF_EXTRACT_OFFSET(REF) ((REF)->extract_ref.offset) | |
| 687 #define DF_REF_EXTRACT_MODE(REF) ((REF)->extract_ref.mode) | |
| 688 | |
| 689 /* Macros to determine the reference type. */ | |
| 690 #define DF_REF_REG_DEF_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_DEF) | |
| 111 | 691 #define DF_REF_REG_USE_P(REF) (!DF_REF_REG_DEF_P (REF)) |
| 0 | 692 #define DF_REF_REG_MEM_STORE_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_MEM_STORE) |
| 693 #define DF_REF_REG_MEM_LOAD_P(REF) (DF_REF_TYPE (REF) == DF_REF_REG_MEM_LOAD) | |
| 694 #define DF_REF_REG_MEM_P(REF) (DF_REF_REG_MEM_STORE_P (REF) \ | |
| 695 || DF_REF_REG_MEM_LOAD_P (REF)) | |
| 696 | |
| 697 #define DF_MWS_REG_DEF_P(MREF) (DF_MWS_TYPE (MREF) == DF_REF_REG_DEF) | |
| 111 | 698 #define DF_MWS_REG_USE_P(MREF) (!DF_MWS_REG_DEF_P (MREF)) |
| 699 #define DF_MWS_NEXT(MREF) ((MREF)->next) | |
| 0 | 700 #define DF_MWS_TYPE(MREF) ((MREF)->type) |
| 701 | |
| 702 /* Macros to get the refs out of def_info or use_info refs table. If | |
| 703 the focus of the dataflow has been set to some subset of blocks | |
| 704 with df_set_blocks, these macros will only find the uses and defs | |
|
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705 in that subset of blocks. |
| 0 | 706 |
| 707 These macros should be used with care. The def macros are only | |
| 708 usable after a call to df_maybe_reorganize_def_refs and the use | |
| 709 macros are only usable after a call to | |
| 710 df_maybe_reorganize_use_refs. HOWEVER, BUILDING AND USING THESE | |
| 711 ARRAYS ARE A CACHE LOCALITY KILLER. */ | |
| 712 | |
| 713 #define DF_DEFS_TABLE_SIZE() (df->def_info.table_size) | |
| 714 #define DF_DEFS_GET(ID) (df->def_info.refs[(ID)]) | |
| 715 #define DF_DEFS_SET(ID,VAL) (df->def_info.refs[(ID)]=(VAL)) | |
| 716 #define DF_DEFS_COUNT(ID) (df->def_info.count[(ID)]) | |
| 717 #define DF_DEFS_BEGIN(ID) (df->def_info.begin[(ID)]) | |
| 718 #define DF_USES_TABLE_SIZE() (df->use_info.table_size) | |
| 719 #define DF_USES_GET(ID) (df->use_info.refs[(ID)]) | |
| 720 #define DF_USES_SET(ID,VAL) (df->use_info.refs[(ID)]=(VAL)) | |
| 721 #define DF_USES_COUNT(ID) (df->use_info.count[(ID)]) | |
| 722 #define DF_USES_BEGIN(ID) (df->use_info.begin[(ID)]) | |
| 723 | |
| 724 /* Macros to access the register information from scan dataflow record. */ | |
| 725 | |
| 726 #define DF_REG_SIZE(DF) (df->regs_inited) | |
| 727 #define DF_REG_DEF_GET(REG) (df->def_regs[(REG)]) | |
| 728 #define DF_REG_DEF_CHAIN(REG) (df->def_regs[(REG)]->reg_chain) | |
| 729 #define DF_REG_DEF_COUNT(REG) (df->def_regs[(REG)]->n_refs) | |
| 730 #define DF_REG_USE_GET(REG) (df->use_regs[(REG)]) | |
| 731 #define DF_REG_USE_CHAIN(REG) (df->use_regs[(REG)]->reg_chain) | |
| 732 #define DF_REG_USE_COUNT(REG) (df->use_regs[(REG)]->n_refs) | |
| 733 #define DF_REG_EQ_USE_GET(REG) (df->eq_use_regs[(REG)]) | |
| 734 #define DF_REG_EQ_USE_CHAIN(REG) (df->eq_use_regs[(REG)]->reg_chain) | |
| 735 #define DF_REG_EQ_USE_COUNT(REG) (df->eq_use_regs[(REG)]->n_refs) | |
| 736 | |
| 737 /* Macros to access the elements within the reg_info structure table. */ | |
| 738 | |
| 739 #define DF_REGNO_FIRST_DEF(REGNUM) \ | |
| 111 | 740 (DF_REG_DEF_GET(REGNUM) ? DF_REG_DEF_GET (REGNUM) : 0) |
| 0 | 741 #define DF_REGNO_LAST_USE(REGNUM) \ |
| 111 | 742 (DF_REG_USE_GET(REGNUM) ? DF_REG_USE_GET (REGNUM) : 0) |
| 0 | 743 |
| 744 /* Macros to access the elements within the insn_info structure table. */ | |
| 745 | |
| 746 #define DF_INSN_SIZE() ((df)->insns_size) | |
| 111 | 747 #define DF_INSN_INFO_GET(INSN) (df->insns[(INSN_UID (INSN))]) |
| 0 | 748 #define DF_INSN_INFO_SET(INSN,VAL) (df->insns[(INSN_UID (INSN))]=(VAL)) |
| 749 #define DF_INSN_INFO_LUID(II) ((II)->luid) | |
| 750 #define DF_INSN_INFO_DEFS(II) ((II)->defs) | |
| 751 #define DF_INSN_INFO_USES(II) ((II)->uses) | |
| 752 #define DF_INSN_INFO_EQ_USES(II) ((II)->eq_uses) | |
| 111 | 753 #define DF_INSN_INFO_MWS(II) ((II)->mw_hardregs) |
| 0 | 754 |
| 111 | 755 #define DF_INSN_LUID(INSN) (DF_INSN_INFO_LUID (DF_INSN_INFO_GET (INSN))) |
| 756 #define DF_INSN_DEFS(INSN) (DF_INSN_INFO_DEFS (DF_INSN_INFO_GET (INSN))) | |
| 757 #define DF_INSN_USES(INSN) (DF_INSN_INFO_USES (DF_INSN_INFO_GET (INSN))) | |
| 758 #define DF_INSN_EQ_USES(INSN) (DF_INSN_INFO_EQ_USES (DF_INSN_INFO_GET (INSN))) | |
| 0 | 759 |
| 760 #define DF_INSN_UID_GET(UID) (df->insns[(UID)]) | |
| 761 #define DF_INSN_UID_SET(UID,VAL) (df->insns[(UID)]=(VAL)) | |
| 111 | 762 #define DF_INSN_UID_SAFE_GET(UID) (((unsigned)(UID) < DF_INSN_SIZE ()) \ |
| 0 | 763 ? DF_INSN_UID_GET (UID) \ |
| 764 : NULL) | |
| 111 | 765 #define DF_INSN_UID_LUID(INSN) (DF_INSN_UID_GET (INSN)->luid) |
| 766 #define DF_INSN_UID_DEFS(INSN) (DF_INSN_UID_GET (INSN)->defs) | |
| 767 #define DF_INSN_UID_USES(INSN) (DF_INSN_UID_GET (INSN)->uses) | |
| 768 #define DF_INSN_UID_EQ_USES(INSN) (DF_INSN_UID_GET (INSN)->eq_uses) | |
| 769 #define DF_INSN_UID_MWS(INSN) (DF_INSN_UID_GET (INSN)->mw_hardregs) | |
| 770 | |
| 771 #define FOR_EACH_INSN_INFO_DEF(ITER, INSN) \ | |
| 772 for (ITER = DF_INSN_INFO_DEFS (INSN); ITER; ITER = DF_REF_NEXT_LOC (ITER)) | |
| 773 | |
| 774 #define FOR_EACH_INSN_INFO_USE(ITER, INSN) \ | |
| 775 for (ITER = DF_INSN_INFO_USES (INSN); ITER; ITER = DF_REF_NEXT_LOC (ITER)) | |
| 776 | |
| 777 #define FOR_EACH_INSN_INFO_EQ_USE(ITER, INSN) \ | |
| 778 for (ITER = DF_INSN_INFO_EQ_USES (INSN); ITER; ITER = DF_REF_NEXT_LOC (ITER)) | |
| 779 | |
| 780 #define FOR_EACH_INSN_INFO_MW(ITER, INSN) \ | |
| 781 for (ITER = DF_INSN_INFO_MWS (INSN); ITER; ITER = DF_MWS_NEXT (ITER)) | |
| 782 | |
| 783 #define FOR_EACH_INSN_DEF(ITER, INSN) \ | |
| 784 FOR_EACH_INSN_INFO_DEF(ITER, DF_INSN_INFO_GET (INSN)) | |
| 785 | |
| 786 #define FOR_EACH_INSN_USE(ITER, INSN) \ | |
| 787 FOR_EACH_INSN_INFO_USE(ITER, DF_INSN_INFO_GET (INSN)) | |
| 788 | |
| 789 #define FOR_EACH_INSN_EQ_USE(ITER, INSN) \ | |
| 790 FOR_EACH_INSN_INFO_EQ_USE(ITER, DF_INSN_INFO_GET (INSN)) | |
| 791 | |
| 792 #define FOR_EACH_ARTIFICIAL_USE(ITER, BB_INDEX) \ | |
| 793 for (ITER = df_get_artificial_uses (BB_INDEX); ITER; \ | |
| 794 ITER = DF_REF_NEXT_LOC (ITER)) | |
| 795 | |
| 796 #define FOR_EACH_ARTIFICIAL_DEF(ITER, BB_INDEX) \ | |
| 797 for (ITER = df_get_artificial_defs (BB_INDEX); ITER; \ | |
| 798 ITER = DF_REF_NEXT_LOC (ITER)) | |
| 0 | 799 |
| 800 /* An obstack for bitmap not related to specific dataflow problems. | |
| 801 This obstack should e.g. be used for bitmaps with a short life time | |
| 802 such as temporary bitmaps. This obstack is declared in df-core.c. */ | |
| 803 | |
| 804 extern bitmap_obstack df_bitmap_obstack; | |
| 805 | |
| 806 | |
| 807 /* One of these structures is allocated for every basic block. */ | |
| 808 struct df_scan_bb_info | |
| 809 { | |
| 810 /* The entry block has many artificial defs and these are at the | |
| 811 bottom of the block. | |
| 812 | |
| 813 Blocks that are targets of exception edges may have some | |
| 814 artificial defs. These are logically located at the top of the | |
| 815 block. | |
| 816 | |
| 817 Blocks that are the targets of non-local goto's have the hard | |
| 818 frame pointer defined at the top of the block. */ | |
| 111 | 819 df_ref artificial_defs; |
| 0 | 820 |
| 821 /* Blocks that are targets of exception edges may have some | |
| 822 artificial uses. These are logically at the top of the block. | |
| 823 | |
| 824 Most blocks have artificial uses at the bottom of the block. */ | |
| 111 | 825 df_ref artificial_uses; |
| 0 | 826 }; |
| 827 | |
| 828 | |
| 829 /* Reaching definitions. All bitmaps are indexed by the id field of | |
| 111 | 830 the ref except sparse_kill which is indexed by regno. For the |
| 831 LR&RD problem, the kill set is not complete: It does not contain | |
| 832 DEFs killed because the set register has died in the LR set. */ | |
|
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833 struct df_rd_bb_info |
| 0 | 834 { |
| 835 /* Local sets to describe the basic blocks. */ | |
|
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836 bitmap_head kill; |
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837 bitmap_head sparse_kill; |
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838 bitmap_head gen; /* The set of defs generated in this block. */ |
| 0 | 839 |
| 840 /* The results of the dataflow problem. */ | |
|
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841 bitmap_head in; /* At the top of the block. */ |
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842 bitmap_head out; /* At the bottom of the block. */ |
| 0 | 843 }; |
| 844 | |
| 845 | |
|
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846 /* Multiple reaching definitions. All bitmaps are referenced by the |
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847 register number. */ |
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848 |
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849 struct df_md_bb_info |
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850 { |
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851 /* Local sets to describe the basic blocks. */ |
|
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852 bitmap_head gen; /* Partial/conditional definitions live at BB out. */ |
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853 bitmap_head kill; /* Other definitions that are live at BB out. */ |
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854 bitmap_head init; /* Definitions coming from dominance frontier edges. */ |
|
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855 |
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856 /* The results of the dataflow problem. */ |
|
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857 bitmap_head in; /* Just before the block itself. */ |
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858 bitmap_head out; /* At the bottom of the block. */ |
|
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859 }; |
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860 |
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861 |
| 0 | 862 /* Live registers, a backwards dataflow problem. All bitmaps are |
| 863 referenced by the register number. */ | |
| 864 | |
|
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865 struct df_lr_bb_info |
| 0 | 866 { |
| 867 /* Local sets to describe the basic blocks. */ | |
|
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868 bitmap_head def; /* The set of registers set in this block |
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869 - except artificial defs at the top. */ |
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870 bitmap_head use; /* The set of registers used in this block. */ |
| 0 | 871 |
| 872 /* The results of the dataflow problem. */ | |
|
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873 bitmap_head in; /* Just before the block itself. */ |
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874 bitmap_head out; /* At the bottom of the block. */ |
| 0 | 875 }; |
| 876 | |
| 877 | |
| 878 /* Uninitialized registers. All bitmaps are referenced by the | |
| 879 register number. Anded results of the forwards and backward live | |
| 880 info. Note that the forwards live information is not available | |
| 881 separately. */ | |
|
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882 struct df_live_bb_info |
| 0 | 883 { |
| 884 /* Local sets to describe the basic blocks. */ | |
|
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885 bitmap_head kill; /* The set of registers unset in this block. Calls, |
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886 for instance, unset registers. */ |
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887 bitmap_head gen; /* The set of registers set in this block. */ |
| 0 | 888 |
| 889 /* The results of the dataflow problem. */ | |
|
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890 bitmap_head in; /* At the top of the block. */ |
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891 bitmap_head out; /* At the bottom of the block. */ |
| 0 | 892 }; |
| 893 | |
| 894 | |
| 895 /* Live registers, a backwards dataflow problem. These bitmaps are | |
|
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896 indexed by 2 * regno for each pseudo and have two entries for each |
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897 pseudo. Only pseudos that have a size of 2 * UNITS_PER_WORD are |
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898 meaningfully tracked. */ |
| 0 | 899 |
|
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900 struct df_word_lr_bb_info |
| 0 | 901 { |
| 902 /* Local sets to describe the basic blocks. */ | |
|
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903 bitmap_head def; /* The set of registers set in this block |
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904 - except artificial defs at the top. */ |
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905 bitmap_head use; /* The set of registers used in this block. */ |
| 0 | 906 |
| 907 /* The results of the dataflow problem. */ | |
|
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908 bitmap_head in; /* Just before the block itself. */ |
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909 bitmap_head out; /* At the bottom of the block. */ |
| 0 | 910 }; |
| 911 | |
| 111 | 912 /* Must-initialized registers. All bitmaps are referenced by the |
| 913 register number. */ | |
| 914 struct df_mir_bb_info | |
| 915 { | |
| 916 /* Local sets to describe the basic blocks. */ | |
| 917 bitmap_head kill; /* The set of registers unset in this block. Calls, | |
| 918 for instance, unset registers. */ | |
| 919 bitmap_head gen; /* The set of registers set in this block, excluding the | |
| 920 ones killed later on in this block. */ | |
| 921 | |
| 922 /* The results of the dataflow problem. */ | |
| 923 bitmap_head in; /* At the top of the block. */ | |
| 924 bitmap_head out; /* At the bottom of the block. */ | |
| 925 }; | |
| 926 | |
| 0 | 927 |
| 928 /* This is used for debugging and for the dumpers to find the latest | |
| 929 instance so that the df info can be added to the dumps. This | |
|
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930 should not be used by regular code. */ |
|
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931 extern struct df_d *df; |
| 0 | 932 #define df_scan (df->problems_by_index[DF_SCAN]) |
| 933 #define df_rd (df->problems_by_index[DF_RD]) | |
| 934 #define df_lr (df->problems_by_index[DF_LR]) | |
| 935 #define df_live (df->problems_by_index[DF_LIVE]) | |
| 936 #define df_chain (df->problems_by_index[DF_CHAIN]) | |
|
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937 #define df_word_lr (df->problems_by_index[DF_WORD_LR]) |
| 0 | 938 #define df_note (df->problems_by_index[DF_NOTE]) |
|
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939 #define df_md (df->problems_by_index[DF_MD]) |
| 111 | 940 #define df_mir (df->problems_by_index[DF_MIR]) |
| 0 | 941 |
| 942 /* This symbol turns on checking that each modification of the cfg has | |
| 943 been identified to the appropriate df routines. It is not part of | |
| 944 verification per se because the check that the final solution has | |
| 945 not changed covers this. However, if the solution is not being | |
| 946 properly recomputed because the cfg is being modified, adding in | |
| 947 calls to df_check_cfg_clean can be used to find the source of that | |
| 948 kind of problem. */ | |
| 949 #if 0 | |
| 950 #define DF_DEBUG_CFG | |
| 951 #endif | |
| 952 | |
| 953 | |
| 954 /* Functions defined in df-core.c. */ | |
| 955 | |
| 111 | 956 extern void df_add_problem (const struct df_problem *); |
|
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957 extern int df_set_flags (int); |
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958 extern int df_clear_flags (int); |
| 0 | 959 extern void df_set_blocks (bitmap); |
| 960 extern void df_remove_problem (struct dataflow *); | |
| 961 extern void df_finish_pass (bool); | |
| 962 extern void df_analyze_problem (struct dataflow *, bitmap, int *, int); | |
| 111 | 963 extern void df_analyze (); |
| 964 extern void df_analyze_loop (struct loop *); | |
| 0 | 965 extern int df_get_n_blocks (enum df_flow_dir); |
| 966 extern int *df_get_postorder (enum df_flow_dir); | |
| 967 extern void df_simple_dataflow (enum df_flow_dir, df_init_function, | |
| 968 df_confluence_function_0, df_confluence_function_n, | |
| 969 df_transfer_function, bitmap, int *, int); | |
| 970 extern void df_mark_solutions_dirty (void); | |
| 971 extern bool df_get_bb_dirty (basic_block); | |
| 972 extern void df_set_bb_dirty (basic_block); | |
| 973 extern void df_compact_blocks (void); | |
| 974 extern void df_bb_replace (int, basic_block); | |
| 975 extern void df_bb_delete (int); | |
| 976 extern void df_verify (void); | |
| 977 #ifdef DF_DEBUG_CFG | |
| 978 extern void df_check_cfg_clean (void); | |
| 979 #endif | |
| 980 extern df_ref df_bb_regno_first_def_find (basic_block, unsigned int); | |
| 981 extern df_ref df_bb_regno_last_def_find (basic_block, unsigned int); | |
| 111 | 982 extern df_ref df_find_def (rtx_insn *, rtx); |
| 983 extern bool df_reg_defined (rtx_insn *, rtx); | |
| 984 extern df_ref df_find_use (rtx_insn *, rtx); | |
| 985 extern bool df_reg_used (rtx_insn *, rtx); | |
| 0 | 986 extern void df_worklist_dataflow (struct dataflow *,bitmap, int *, int); |
| 987 extern void df_print_regset (FILE *file, bitmap r); | |
|
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988 extern void df_print_word_regset (FILE *file, bitmap r); |
| 0 | 989 extern void df_dump (FILE *); |
| 990 extern void df_dump_region (FILE *); | |
| 991 extern void df_dump_start (FILE *); | |
| 992 extern void df_dump_top (basic_block, FILE *); | |
| 993 extern void df_dump_bottom (basic_block, FILE *); | |
| 111 | 994 extern void df_dump_insn_top (const rtx_insn *, FILE *); |
| 995 extern void df_dump_insn_bottom (const rtx_insn *, FILE *); | |
| 996 extern void df_refs_chain_dump (df_ref, bool, FILE *); | |
| 0 | 997 extern void df_regs_chain_dump (df_ref, FILE *); |
| 111 | 998 extern void df_insn_debug (rtx_insn *, bool, FILE *); |
| 999 extern void df_insn_debug_regno (rtx_insn *, FILE *); | |
| 0 | 1000 extern void df_regno_debug (unsigned int, FILE *); |
| 1001 extern void df_ref_debug (df_ref, FILE *); | |
| 111 | 1002 extern void debug_df_insn (rtx_insn *); |
| 0 | 1003 extern void debug_df_regno (unsigned int); |
| 1004 extern void debug_df_reg (rtx); | |
| 1005 extern void debug_df_defno (unsigned int); | |
| 1006 extern void debug_df_useno (unsigned int); | |
| 1007 extern void debug_df_ref (df_ref); | |
| 1008 extern void debug_df_chain (struct df_link *); | |
| 1009 | |
| 1010 /* Functions defined in df-problems.c. */ | |
| 1011 | |
| 1012 extern struct df_link *df_chain_create (df_ref, df_ref); | |
| 1013 extern void df_chain_unlink (df_ref); | |
| 1014 extern void df_chain_copy (df_ref, struct df_link *); | |
| 1015 extern void df_grow_bb_info (struct dataflow *); | |
| 1016 extern void df_chain_dump (struct df_link *, FILE *); | |
| 1017 extern void df_print_bb_index (basic_block bb, FILE *file); | |
| 1018 extern void df_rd_add_problem (void); | |
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1019 extern void df_rd_simulate_artificial_defs_at_top (basic_block, bitmap); |
| 111 | 1020 extern void df_rd_simulate_one_insn (basic_block, rtx_insn *, bitmap); |
| 0 | 1021 extern void df_lr_add_problem (void); |
| 1022 extern void df_lr_verify_transfer_functions (void); | |
| 1023 extern void df_live_verify_transfer_functions (void); | |
| 1024 extern void df_live_add_problem (void); | |
| 1025 extern void df_live_set_all_dirty (void); | |
|
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1026 extern void df_chain_add_problem (unsigned int); |
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1027 extern void df_word_lr_add_problem (void); |
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1028 extern bool df_word_lr_mark_ref (df_ref, bool, bitmap); |
| 111 | 1029 extern bool df_word_lr_simulate_defs (rtx_insn *, bitmap); |
| 1030 extern void df_word_lr_simulate_uses (rtx_insn *, bitmap); | |
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1031 extern void df_word_lr_simulate_artificial_refs_at_top (basic_block, bitmap); |
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1032 extern void df_word_lr_simulate_artificial_refs_at_end (basic_block, bitmap); |
| 0 | 1033 extern void df_note_add_problem (void); |
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1034 extern void df_md_add_problem (void); |
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1035 extern void df_md_simulate_artificial_defs_at_top (basic_block, bitmap); |
| 111 | 1036 extern void df_md_simulate_one_insn (basic_block, rtx_insn *, bitmap); |
| 1037 extern void df_mir_add_problem (void); | |
| 1038 extern void df_mir_simulate_one_insn (basic_block, rtx_insn *, bitmap, bitmap); | |
| 1039 extern void df_simulate_find_noclobber_defs (rtx_insn *, bitmap); | |
| 1040 extern void df_simulate_find_defs (rtx_insn *, bitmap); | |
| 1041 extern void df_simulate_defs (rtx_insn *, bitmap); | |
| 1042 extern void df_simulate_uses (rtx_insn *, bitmap); | |
| 0 | 1043 extern void df_simulate_initialize_backwards (basic_block, bitmap); |
| 111 | 1044 extern void df_simulate_one_insn_backwards (basic_block, rtx_insn *, bitmap); |
| 0 | 1045 extern void df_simulate_finalize_backwards (basic_block, bitmap); |
| 1046 extern void df_simulate_initialize_forwards (basic_block, bitmap); | |
| 111 | 1047 extern void df_simulate_one_insn_forwards (basic_block, rtx_insn *, bitmap); |
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1048 extern void simulate_backwards_to_point (basic_block, regset, rtx); |
| 111 | 1049 extern bool can_move_insns_across (rtx_insn *, rtx_insn *, |
| 1050 rtx_insn *, rtx_insn *, | |
| 1051 basic_block, regset, | |
| 1052 regset, rtx_insn **); | |
| 0 | 1053 /* Functions defined in df-scan.c. */ |
| 1054 | |
| 1055 extern void df_scan_alloc (bitmap); | |
| 1056 extern void df_scan_add_problem (void); | |
| 1057 extern void df_grow_reg_info (void); | |
| 1058 extern void df_grow_insn_info (void); | |
| 1059 extern void df_scan_blocks (void); | |
| 111 | 1060 extern void df_uses_create (rtx *, rtx_insn *, int); |
| 1061 extern struct df_insn_info * df_insn_create_insn_record (rtx_insn *); | |
| 1062 extern void df_insn_delete (rtx_insn *); | |
| 0 | 1063 extern void df_bb_refs_record (int, bool); |
| 111 | 1064 extern bool df_insn_rescan (rtx_insn *); |
| 1065 extern bool df_insn_rescan_debug_internal (rtx_insn *); | |
| 0 | 1066 extern void df_insn_rescan_all (void); |
| 1067 extern void df_process_deferred_rescans (void); | |
| 1068 extern void df_recompute_luids (basic_block); | |
| 111 | 1069 extern void df_insn_change_bb (rtx_insn *, basic_block); |
| 0 | 1070 extern void df_maybe_reorganize_use_refs (enum df_ref_order); |
| 1071 extern void df_maybe_reorganize_def_refs (enum df_ref_order); | |
| 111 | 1072 extern void df_ref_change_reg_with_loc (rtx, unsigned int); |
| 1073 extern void df_notes_rescan (rtx_insn *); | |
| 0 | 1074 extern void df_hard_reg_init (void); |
| 1075 extern void df_update_entry_block_defs (void); | |
| 1076 extern void df_update_exit_block_uses (void); | |
| 1077 extern void df_update_entry_exit_and_calls (void); | |
| 1078 extern bool df_hard_reg_used_p (unsigned int); | |
| 1079 extern unsigned int df_hard_reg_used_count (unsigned int); | |
| 1080 extern bool df_regs_ever_live_p (unsigned int); | |
| 1081 extern void df_set_regs_ever_live (unsigned int, bool); | |
| 1082 extern void df_compute_regs_ever_live (bool); | |
| 1083 extern void df_scan_verify (void); | |
| 1084 | |
| 111 | 1085 |
| 1086 /*---------------------------------------------------------------------------- | |
| 1087 Public functions access functions for the dataflow problems. | |
| 1088 ----------------------------------------------------------------------------*/ | |
| 0 | 1089 |
| 1090 static inline struct df_scan_bb_info * | |
| 1091 df_scan_get_bb_info (unsigned int index) | |
| 1092 { | |
| 1093 if (index < df_scan->block_info_size) | |
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1094 return &((struct df_scan_bb_info *) df_scan->block_info)[index]; |
| 0 | 1095 else |
| 1096 return NULL; | |
| 1097 } | |
| 1098 | |
| 1099 static inline struct df_rd_bb_info * | |
| 1100 df_rd_get_bb_info (unsigned int index) | |
| 1101 { | |
| 1102 if (index < df_rd->block_info_size) | |
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1103 return &((struct df_rd_bb_info *) df_rd->block_info)[index]; |
| 0 | 1104 else |
| 1105 return NULL; | |
| 1106 } | |
| 1107 | |
| 1108 static inline struct df_lr_bb_info * | |
| 1109 df_lr_get_bb_info (unsigned int index) | |
| 1110 { | |
| 1111 if (index < df_lr->block_info_size) | |
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1112 return &((struct df_lr_bb_info *) df_lr->block_info)[index]; |
| 0 | 1113 else |
| 1114 return NULL; | |
| 1115 } | |
| 1116 | |
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1117 static inline struct df_md_bb_info * |
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1118 df_md_get_bb_info (unsigned int index) |
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1119 { |
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1120 if (index < df_md->block_info_size) |
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1121 return &((struct df_md_bb_info *) df_md->block_info)[index]; |
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1122 else |
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1123 return NULL; |
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1124 } |
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1125 |
| 0 | 1126 static inline struct df_live_bb_info * |
| 1127 df_live_get_bb_info (unsigned int index) | |
| 1128 { | |
| 1129 if (index < df_live->block_info_size) | |
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1130 return &((struct df_live_bb_info *) df_live->block_info)[index]; |
| 0 | 1131 else |
| 1132 return NULL; | |
| 1133 } | |
| 1134 | |
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1135 static inline struct df_word_lr_bb_info * |
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1136 df_word_lr_get_bb_info (unsigned int index) |
| 0 | 1137 { |
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1138 if (index < df_word_lr->block_info_size) |
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1139 return &((struct df_word_lr_bb_info *) df_word_lr->block_info)[index]; |
| 0 | 1140 else |
| 1141 return NULL; | |
| 1142 } | |
| 1143 | |
| 111 | 1144 static inline struct df_mir_bb_info * |
| 1145 df_mir_get_bb_info (unsigned int index) | |
| 1146 { | |
| 1147 if (index < df_mir->block_info_size) | |
| 1148 return &((struct df_mir_bb_info *) df_mir->block_info)[index]; | |
| 1149 else | |
| 1150 return NULL; | |
| 1151 } | |
| 1152 | |
| 1153 /* Get the live at out set for BB no matter what problem happens to be | |
| 1154 defined. This function is used by the register allocators who | |
| 1155 choose different dataflow problems depending on the optimization | |
| 1156 level. */ | |
| 1157 | |
| 1158 static inline bitmap | |
| 1159 df_get_live_out (basic_block bb) | |
| 1160 { | |
| 1161 gcc_checking_assert (df_lr); | |
| 1162 | |
| 1163 if (df_live) | |
| 1164 return DF_LIVE_OUT (bb); | |
| 1165 else | |
| 1166 return DF_LR_OUT (bb); | |
| 1167 } | |
| 1168 | |
| 1169 /* Get the live at in set for BB no matter what problem happens to be | |
| 1170 defined. This function is used by the register allocators who | |
| 1171 choose different dataflow problems depending on the optimization | |
| 1172 level. */ | |
| 1173 | |
| 1174 static inline bitmap | |
| 1175 df_get_live_in (basic_block bb) | |
| 1176 { | |
| 1177 gcc_checking_assert (df_lr); | |
| 1178 | |
| 1179 if (df_live) | |
| 1180 return DF_LIVE_IN (bb); | |
| 1181 else | |
| 1182 return DF_LR_IN (bb); | |
| 1183 } | |
| 1184 | |
| 1185 /* Get basic block info. */ | |
| 0 | 1186 /* Get the artificial defs for a basic block. */ |
| 1187 | |
| 111 | 1188 static inline df_ref |
| 0 | 1189 df_get_artificial_defs (unsigned int bb_index) |
| 1190 { | |
| 1191 return df_scan_get_bb_info (bb_index)->artificial_defs; | |
| 1192 } | |
| 1193 | |
| 1194 | |
| 1195 /* Get the artificial uses for a basic block. */ | |
| 1196 | |
| 111 | 1197 static inline df_ref |
| 0 | 1198 df_get_artificial_uses (unsigned int bb_index) |
| 1199 { | |
| 1200 return df_scan_get_bb_info (bb_index)->artificial_uses; | |
| 1201 } | |
| 1202 | |
| 111 | 1203 /* If INSN defines exactly one register, return the associated reference, |
| 1204 otherwise return null. */ | |
| 1205 | |
| 1206 static inline df_ref | |
| 1207 df_single_def (const df_insn_info *info) | |
| 1208 { | |
| 1209 df_ref defs = DF_INSN_INFO_DEFS (info); | |
| 1210 return defs && !DF_REF_NEXT_LOC (defs) ? defs : NULL; | |
| 1211 } | |
| 1212 | |
| 1213 /* If INSN uses exactly one register, return the associated reference, | |
| 1214 otherwise return null. */ | |
| 1215 | |
| 1216 static inline df_ref | |
| 1217 df_single_use (const df_insn_info *info) | |
| 1218 { | |
| 1219 df_ref uses = DF_INSN_INFO_USES (info); | |
| 1220 return uses && !DF_REF_NEXT_LOC (uses) ? uses : NULL; | |
| 1221 } | |
| 0 | 1222 |
| 1223 /* web */ | |
| 1224 | |
| 111 | 1225 class web_entry_base |
| 0 | 1226 { |
| 111 | 1227 private: |
| 1228 /* Reference to the parent in the union/find tree. */ | |
| 1229 web_entry_base *pred_pvt; | |
| 1230 | |
| 1231 public: | |
| 1232 /* Accessors. */ | |
| 1233 web_entry_base *pred () { return pred_pvt; } | |
| 1234 void set_pred (web_entry_base *p) { pred_pvt = p; } | |
| 1235 | |
| 1236 /* Find representative in union-find tree. */ | |
| 1237 web_entry_base *unionfind_root (); | |
| 1238 | |
| 1239 /* Union with another set, returning TRUE if they are already unioned. */ | |
| 1240 friend bool unionfind_union (web_entry_base *first, web_entry_base *second); | |
| 0 | 1241 }; |
| 1242 | |
| 1243 #endif /* GCC_DF_H */ |