Mercurial > hg > CbC > CbC_gcc
comparison gcc/df.h @ 55:77e2b8dfacca gcc-4.4.5
update it from 4.4.3 to 4.5.0
author | ryoma <e075725@ie.u-ryukyu.ac.jp> |
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date | Fri, 12 Feb 2010 23:39:51 +0900 |
parents | a06113de4d67 |
children | b7f97abdc517 |
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52:c156f1bd5cd9 | 55:77e2b8dfacca |
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1 /* Form lists of pseudo register references for autoinc optimization | 1 /* Form lists of pseudo register references for autoinc optimization |
2 for GNU compiler. This is part of flow optimization. | 2 for GNU compiler. This is part of flow optimization. |
3 Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009 | 3 Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
4 Free Software Foundation, Inc. | 4 Free Software Foundation, Inc. |
5 Originally contributed by Michael P. Hayes | 5 Originally contributed by Michael P. Hayes |
6 (m.hayes@elec.canterbury.ac.nz, mhayes@redhat.com) | 6 (m.hayes@elec.canterbury.ac.nz, mhayes@redhat.com) |
7 Major rewrite contributed by Danny Berlin (dberlin@dberlin.org) | 7 Major rewrite contributed by Danny Berlin (dberlin@dberlin.org) |
8 and Kenneth Zadeck (zadeck@naturalbridge.com). | 8 and Kenneth Zadeck (zadeck@naturalbridge.com). |
9 | 9 |
10 This file is part of GCC. | 10 This file is part of GCC. |
27 #define GCC_DF_H | 27 #define GCC_DF_H |
28 | 28 |
29 #include "bitmap.h" | 29 #include "bitmap.h" |
30 #include "basic-block.h" | 30 #include "basic-block.h" |
31 #include "alloc-pool.h" | 31 #include "alloc-pool.h" |
32 #include "timevar.h" | |
32 | 33 |
33 struct dataflow; | 34 struct dataflow; |
34 struct df; | 35 struct df; |
35 struct df_problem; | 36 struct df_problem; |
36 struct df_link; | 37 struct df_link; |
37 struct df_insn_info; | 38 struct df_insn_info; |
38 union df_ref_d; | 39 union df_ref_d; |
39 | 40 |
40 /* Data flow problems. All problems must have a unique id here. */ | 41 /* Data flow problems. All problems must have a unique id here. */ |
41 | 42 |
42 /* Scanning is not really a dataflow problem, but it is useful to have | 43 /* Scanning is not really a dataflow problem, but it is useful to have |
43 the basic block functions in the vector so that things get done in | 44 the basic block functions in the vector so that things get done in |
44 a uniform manner. The last four problems can be added or deleted | 45 a uniform manner. The last four problems can be added or deleted |
45 at any time are always defined (though LIVE is always there at -O2 | 46 at any time are always defined (though LIVE is always there at -O2 |
46 or higher); the others are always there. */ | 47 or higher); the others are always there. */ |
47 #define DF_SCAN 0 | 48 #define DF_SCAN 0 |
48 #define DF_LR 1 /* Live Registers backward. */ | 49 #define DF_LR 1 /* Live Registers backward. */ |
49 #define DF_LIVE 2 /* Live Registers & Uninitialized Registers */ | 50 #define DF_LIVE 2 /* Live Registers & Uninitialized Registers */ |
50 #define DF_RD 3 /* Reaching Defs. */ | 51 #define DF_RD 3 /* Reaching Defs. */ |
51 #define DF_CHAIN 4 /* Def-Use and/or Use-Def Chains. */ | 52 #define DF_CHAIN 4 /* Def-Use and/or Use-Def Chains. */ |
52 #define DF_BYTE_LR 5 /* Subreg tracking lr. */ | 53 #define DF_BYTE_LR 5 /* Subreg tracking lr. */ |
53 #define DF_NOTE 6 /* REG_DEF and REG_UNUSED notes. */ | 54 #define DF_NOTE 6 /* REG_DEF and REG_UNUSED notes. */ |
54 | 55 #define DF_MD 7 /* Multiple Definitions. */ |
55 #define DF_LAST_PROBLEM_PLUS1 (DF_NOTE + 1) | 56 |
57 #define DF_LAST_PROBLEM_PLUS1 (DF_MD + 1) | |
56 | 58 |
57 /* Dataflow direction. */ | 59 /* Dataflow direction. */ |
58 enum df_flow_dir | 60 enum df_flow_dir |
59 { | 61 { |
60 DF_NONE, | 62 DF_NONE, |
101 | 103 |
102 | 104 |
103 /* This flag is set if this ref is a partial use or def of the | 105 /* This flag is set if this ref is a partial use or def of the |
104 associated register. */ | 106 associated register. */ |
105 DF_REF_PARTIAL = 1 << 4, | 107 DF_REF_PARTIAL = 1 << 4, |
106 | 108 |
107 /* Read-modify-write refs generate both a use and a def and | 109 /* Read-modify-write refs generate both a use and a def and |
108 these are marked with this flag to show that they are not | 110 these are marked with this flag to show that they are not |
109 independent. */ | 111 independent. */ |
110 DF_REF_READ_WRITE = 1 << 5, | 112 DF_REF_READ_WRITE = 1 << 5, |
111 | 113 |
116 DF_REF_MUST_CLOBBER. */ | 118 DF_REF_MUST_CLOBBER. */ |
117 DF_REF_MAY_CLOBBER = 1 << 6, | 119 DF_REF_MAY_CLOBBER = 1 << 6, |
118 | 120 |
119 /* This flag is set if this ref, generally a def, is a real | 121 /* This flag is set if this ref, generally a def, is a real |
120 clobber. This is not currently set for registers live across a | 122 clobber. This is not currently set for registers live across a |
121 call because that clobbering may or may not happen. | 123 call because that clobbering may or may not happen. |
122 | 124 |
123 Most of the uses of this are with sets that have a | 125 Most of the uses of this are with sets that have a |
124 GET_CODE(..)==CLOBBER. Note that this is set even if the | 126 GET_CODE(..)==CLOBBER. Note that this is set even if the |
125 clobber is to a subreg. So in order to tell if the clobber | 127 clobber is to a subreg. So in order to tell if the clobber |
126 wipes out the entire register, it is necessary to also check | 128 wipes out the entire register, it is necessary to also check |
129 | 131 |
130 | 132 |
131 /* If the ref has one of the following two flags set, then the | 133 /* If the ref has one of the following two flags set, then the |
132 struct df_ref can be cast to struct df_ref_extract to access | 134 struct df_ref can be cast to struct df_ref_extract to access |
133 the width and offset fields. */ | 135 the width and offset fields. */ |
134 | 136 |
135 /* This flag is set if the ref contains a SIGN_EXTRACT. */ | 137 /* This flag is set if the ref contains a SIGN_EXTRACT. */ |
136 DF_REF_SIGN_EXTRACT = 1 << 8, | 138 DF_REF_SIGN_EXTRACT = 1 << 8, |
137 | 139 |
138 /* This flag is set if the ref contains a ZERO_EXTRACT. */ | 140 /* This flag is set if the ref contains a ZERO_EXTRACT. */ |
139 DF_REF_ZERO_EXTRACT = 1 << 9, | 141 DF_REF_ZERO_EXTRACT = 1 << 9, |
161 }; | 163 }; |
162 | 164 |
163 /* The possible ordering of refs within the df_ref_info. */ | 165 /* The possible ordering of refs within the df_ref_info. */ |
164 enum df_ref_order | 166 enum df_ref_order |
165 { | 167 { |
166 /* There is not table. */ | 168 /* There is not table. */ |
167 DF_REF_ORDER_NO_TABLE, | 169 DF_REF_ORDER_NO_TABLE, |
168 | 170 |
169 /* There is a table of refs but it is not (or no longer) organized | 171 /* There is a table of refs but it is not (or no longer) organized |
170 by one of the following methods. */ | 172 by one of the following methods. */ |
171 DF_REF_ORDER_UNORDERED, | 173 DF_REF_ORDER_UNORDERED, |
172 DF_REF_ORDER_UNORDERED_WITH_NOTES, | 174 DF_REF_ORDER_UNORDERED_WITH_NOTES, |
173 | 175 |
174 /* Organize the table by reg order, all of the refs with regno 0 | 176 /* Organize the table by reg order, all of the refs with regno 0 |
175 followed by all of the refs with regno 1 ... . Within all of | 177 followed by all of the refs with regno 1 ... . Within all of |
176 the regs for a particular regno, the refs are unordered. */ | 178 the regs for a particular regno, the refs are unordered. */ |
177 DF_REF_ORDER_BY_REG, | 179 DF_REF_ORDER_BY_REG, |
178 | 180 |
179 /* For uses, the refs within eq notes may be added for | 181 /* For uses, the refs within eq notes may be added for |
180 DF_REF_ORDER_BY_REG. */ | 182 DF_REF_ORDER_BY_REG. */ |
181 DF_REF_ORDER_BY_REG_WITH_NOTES, | 183 DF_REF_ORDER_BY_REG_WITH_NOTES, |
182 | 184 |
183 /* Organize the refs in insn order. The insns are ordered within a | 185 /* Organize the refs in insn order. The insns are ordered within a |
184 block, and the blocks are ordered by FOR_ALL_BB. */ | 186 block, and the blocks are ordered by FOR_ALL_BB. */ |
185 DF_REF_ORDER_BY_INSN, | 187 DF_REF_ORDER_BY_INSN, |
186 | 188 |
187 /* For uses, the refs within eq notes may be added for | 189 /* For uses, the refs within eq notes may be added for |
188 DF_REF_ORDER_BY_INSN. */ | 190 DF_REF_ORDER_BY_INSN. */ |
189 DF_REF_ORDER_BY_INSN_WITH_NOTES | 191 DF_REF_ORDER_BY_INSN_WITH_NOTES |
251 typedefs for doc for the function fields. */ | 253 typedefs for doc for the function fields. */ |
252 | 254 |
253 struct df_problem { | 255 struct df_problem { |
254 /* The unique id of the problem. This is used it index into | 256 /* The unique id of the problem. This is used it index into |
255 df->defined_problems to make accessing the problem data easy. */ | 257 df->defined_problems to make accessing the problem data easy. */ |
256 unsigned int id; | 258 unsigned int id; |
257 enum df_flow_dir dir; /* Dataflow direction. */ | 259 enum df_flow_dir dir; /* Dataflow direction. */ |
258 df_alloc_function alloc_fun; | 260 df_alloc_function alloc_fun; |
259 df_reset_function reset_fun; | 261 df_reset_function reset_fun; |
260 df_free_bb_function free_bb_fun; | 262 df_free_bb_function free_bb_fun; |
261 df_local_compute_function local_compute_fun; | 263 df_local_compute_function local_compute_fun; |
273 df_verify_solution_start verify_start_fun; | 275 df_verify_solution_start verify_start_fun; |
274 df_verify_solution_end verify_end_fun; | 276 df_verify_solution_end verify_end_fun; |
275 struct df_problem *dependent_problem; | 277 struct df_problem *dependent_problem; |
276 | 278 |
277 /* The timevar id associated with this pass. */ | 279 /* The timevar id associated with this pass. */ |
278 unsigned int tv_id; | 280 timevar_id_t tv_id; |
279 | 281 |
280 /* True if the df_set_blocks should null out the basic block info if | 282 /* True if the df_set_blocks should null out the basic block info if |
281 this block drops out of df->blocks_to_analyze. */ | 283 this block drops out of df->blocks_to_analyze. */ |
282 bool free_blocks_on_set_blocks; | 284 bool free_blocks_on_set_blocks; |
283 }; | 285 }; |
292 solution specific information. */ | 294 solution specific information. */ |
293 void **block_info; | 295 void **block_info; |
294 unsigned int block_info_size; | 296 unsigned int block_info_size; |
295 | 297 |
296 /* The pool to allocate the block_info from. */ | 298 /* The pool to allocate the block_info from. */ |
297 alloc_pool block_pool; | 299 alloc_pool block_pool; |
298 | 300 |
299 /* The lr and live problems have their transfer functions recomputed | 301 /* The lr and live problems have their transfer functions recomputed |
300 only if necessary. This is possible for them because, the | 302 only if necessary. This is possible for them because, the |
301 problems are kept active for the entire backend and their | 303 problems are kept active for the entire backend and their |
302 transfer functions are indexed by the REGNO. These are not | 304 transfer functions are indexed by the REGNO. These are not |
309 fully public. */ | 311 fully public. */ |
310 void *problem_data; | 312 void *problem_data; |
311 | 313 |
312 /* Local flags for some of the problems. */ | 314 /* Local flags for some of the problems. */ |
313 unsigned int local_flags; | 315 unsigned int local_flags; |
314 | 316 |
315 /* True if this problem of this instance has been initialized. This | 317 /* True if this problem of this instance has been initialized. This |
316 is used by the dumpers to keep garbage out of the dumps if, for | 318 is used by the dumpers to keep garbage out of the dumps if, for |
317 debugging a dump is produced before the first call to | 319 debugging a dump is produced before the first call to |
318 df_analyze after a new problem is added. */ | 320 df_analyze after a new problem is added. */ |
319 bool computed; | 321 bool computed; |
320 | 322 |
321 /* True if the something has changed which invalidates the dataflow | 323 /* True if the something has changed which invalidates the dataflow |
322 solutions. Note that this bit is always true for all problems except | 324 solutions. Note that this bit is always true for all problems except |
323 lr and live. */ | 325 lr and live. */ |
324 bool solutions_dirty; | 326 bool solutions_dirty; |
325 | 327 |
326 /* If true, this pass is deleted by df_finish_pass. This is never | 328 /* If true, this pass is deleted by df_finish_pass. This is never |
327 true for DF_SCAN and DF_LR. It is true for DF_LIVE if optimize > | 329 true for DF_SCAN and DF_LR. It is true for DF_LIVE if optimize > |
334 instruction. These are factored into individual uses and defs but | 336 instruction. These are factored into individual uses and defs but |
335 the aggregate is still needed to service the REG_DEAD and | 337 the aggregate is still needed to service the REG_DEAD and |
336 REG_UNUSED notes. */ | 338 REG_UNUSED notes. */ |
337 struct df_mw_hardreg | 339 struct df_mw_hardreg |
338 { | 340 { |
339 rtx mw_reg; /* The multiword hardreg. */ | 341 rtx mw_reg; /* The multiword hardreg. */ |
340 /* These two bitfields are intentionally oversized, in the hope that | 342 /* These two bitfields are intentionally oversized, in the hope that |
341 accesses to 16-bit fields will usually be quicker. */ | 343 accesses to 16-bit fields will usually be quicker. */ |
342 ENUM_BITFIELD(df_ref_type) type : 16; | 344 ENUM_BITFIELD(df_ref_type) type : 16; |
343 /* Used to see if the ref is read or write. */ | 345 /* Used to see if the ref is read or write. */ |
344 ENUM_BITFIELD(df_ref_flags) flags : 16; | 346 int flags : 16; /* Various df_ref_flags. */ |
345 /* Various flags. */ | |
346 unsigned int start_regno; /* First word of the multi word subreg. */ | 347 unsigned int start_regno; /* First word of the multi word subreg. */ |
347 unsigned int end_regno; /* Last word of the multi word subreg. */ | 348 unsigned int end_regno; /* Last word of the multi word subreg. */ |
348 unsigned int mw_order; /* Same as df_ref.ref_order. */ | 349 unsigned int mw_order; /* Same as df_ref.ref_order. */ |
349 }; | 350 }; |
350 | 351 |
351 | 352 |
352 /* Define a register reference structure. One of these is allocated | 353 /* Define a register reference structure. One of these is allocated |
353 for every register reference (use or def). Note some register | 354 for every register reference (use or def). Note some register |
354 references (e.g., post_inc, subreg) generate both a def and a use. */ | 355 references (e.g., post_inc, subreg) generate both a def and a use. */ |
355 struct df_base_ref | 356 struct df_base_ref |
358 accesses to 8 and 16-bit fields will usually be quicker. */ | 359 accesses to 8 and 16-bit fields will usually be quicker. */ |
359 ENUM_BITFIELD(df_ref_class) cl : 8; | 360 ENUM_BITFIELD(df_ref_class) cl : 8; |
360 | 361 |
361 ENUM_BITFIELD(df_ref_type) type : 8; | 362 ENUM_BITFIELD(df_ref_type) type : 8; |
362 /* Type of ref. */ | 363 /* Type of ref. */ |
363 ENUM_BITFIELD(df_ref_flags) flags : 16; | 364 int flags : 16; /* Various df_ref_flags. */ |
364 /* Various flags. */ | |
365 rtx reg; /* The register referenced. */ | 365 rtx reg; /* The register referenced. */ |
366 struct df_link *chain; /* Head of def-use, use-def. */ | 366 struct df_link *chain; /* Head of def-use, use-def. */ |
367 /* Pointer to the insn info of the containing instruction. FIXME! | 367 /* Pointer to the insn info of the containing instruction. FIXME! |
368 Currently this is NULL for artificial refs but this will be used | 368 Currently this is NULL for artificial refs but this will be used |
369 when FUDs are added. */ | 369 when FUDs are added. */ |
370 struct df_insn_info *insn_info; | 370 struct df_insn_info *insn_info; |
371 /* For each regno, there are three chains of refs, one for the uses, | 371 /* For each regno, there are three chains of refs, one for the uses, |
372 the eq_uses and the defs. These chains go thru the refs | 372 the eq_uses and the defs. These chains go thru the refs |
373 themselves rather than using an external structure. */ | 373 themselves rather than using an external structure. */ |
374 union df_ref_d *next_reg; /* Next ref with same regno and type. */ | 374 union df_ref_d *next_reg; /* Next ref with same regno and type. */ |
375 union df_ref_d *prev_reg; /* Prev ref with same regno and type. */ | 375 union df_ref_d *prev_reg; /* Prev ref with same regno and type. */ |
376 unsigned int regno; /* The register number referenced. */ | 376 unsigned int regno; /* The register number referenced. */ |
377 /* Location in the ref table. This is only valid after a call to | 377 /* Location in the ref table. This is only valid after a call to |
378 df_maybe_reorganize_[use,def]_refs which is an expensive operation. */ | 378 df_maybe_reorganize_[use,def]_refs which is an expensive operation. */ |
379 int id; | 379 int id; |
380 /* The index at which the operand was scanned in the insn. This is | 380 /* The index at which the operand was scanned in the insn. This is |
381 used to totally order the refs in an insn. */ | 381 used to totally order the refs in an insn. */ |
382 unsigned int ref_order; | 382 unsigned int ref_order; |
383 }; | 383 }; |
384 | 384 |
385 | 385 |
386 /* The three types of df_refs. Note that the df_ref_extract is an | 386 /* The three types of df_refs. Note that the df_ref_extract is an |
387 extension of the df_regular_ref, not the df_base_ref. */ | 387 extension of the df_regular_ref, not the df_base_ref. */ |
388 struct df_artificial_ref | 388 struct df_artificial_ref |
389 { | 389 { |
390 struct df_base_ref base; | 390 struct df_base_ref base; |
391 | 391 |
392 /* Artificial refs do not have an insn, so to get the basic block, | 392 /* Artificial refs do not have an insn, so to get the basic block, |
434 { | 434 { |
435 rtx insn; /* The insn this info comes from. */ | 435 rtx insn; /* The insn this info comes from. */ |
436 df_ref *defs; /* Head of insn-def chain. */ | 436 df_ref *defs; /* Head of insn-def chain. */ |
437 df_ref *uses; /* Head of insn-use chain. */ | 437 df_ref *uses; /* Head of insn-use chain. */ |
438 /* Head of insn-use chain for uses in REG_EQUAL/EQUIV notes. */ | 438 /* Head of insn-use chain for uses in REG_EQUAL/EQUIV notes. */ |
439 df_ref *eq_uses; | 439 df_ref *eq_uses; |
440 struct df_mw_hardreg **mw_hardregs; | 440 struct df_mw_hardreg **mw_hardregs; |
441 /* The logical uid of the insn in the basic block. This is valid | 441 /* The logical uid of the insn in the basic block. This is valid |
442 after any call to df_analyze but may rot after insns are added, | 442 after any call to df_analyze but may rot after insns are added, |
443 deleted or moved. */ | 443 deleted or moved. */ |
444 int luid; | 444 int luid; |
445 }; | 445 }; |
446 | 446 |
447 /* These links are used for ref-ref chains. Currently only DEF-USE and | 447 /* These links are used for ref-ref chains. Currently only DEF-USE and |
448 USE-DEF chains can be built by DF. */ | 448 USE-DEF chains can be built by DF. */ |
449 struct df_link | 449 struct df_link |
450 { | 450 { |
451 df_ref ref; | 451 df_ref ref; |
454 | 454 |
455 | 455 |
456 enum df_chain_flags | 456 enum df_chain_flags |
457 { | 457 { |
458 /* Flags that control the building of chains. */ | 458 /* Flags that control the building of chains. */ |
459 DF_DU_CHAIN = 1, /* Build DU chains. */ | 459 DF_DU_CHAIN = 1, /* Build DU chains. */ |
460 DF_UD_CHAIN = 2 /* Build UD chains. */ | 460 DF_UD_CHAIN = 2 /* Build UD chains. */ |
461 }; | 461 }; |
462 | 462 |
463 enum df_changeable_flags | 463 enum df_changeable_flags |
464 { | 464 { |
465 /* Scanning flags. */ | 465 /* Scanning flags. */ |
466 /* Flag to control the running of dce as a side effect of building LR. */ | 466 /* Flag to control the running of dce as a side effect of building LR. */ |
467 DF_LR_RUN_DCE = 1 << 0, /* Run DCE. */ | 467 DF_LR_RUN_DCE = 1 << 0, /* Run DCE. */ |
468 DF_NO_HARD_REGS = 1 << 1, /* Skip hard registers in RD and CHAIN Building. */ | 468 DF_NO_HARD_REGS = 1 << 1, /* Skip hard registers in RD and CHAIN Building. */ |
531 nulls at the end of it. In PROBLEMS_BY_INDEX, the problem is | 531 nulls at the end of it. In PROBLEMS_BY_INDEX, the problem is |
532 stored by the value in df_problem.id. These are used to access | 532 stored by the value in df_problem.id. These are used to access |
533 the problem local data without having to search the first | 533 the problem local data without having to search the first |
534 array. */ | 534 array. */ |
535 | 535 |
536 struct dataflow *problems_in_order[DF_LAST_PROBLEM_PLUS1]; | 536 struct dataflow *problems_in_order[DF_LAST_PROBLEM_PLUS1]; |
537 struct dataflow *problems_by_index[DF_LAST_PROBLEM_PLUS1]; | 537 struct dataflow *problems_by_index[DF_LAST_PROBLEM_PLUS1]; |
538 | 538 |
539 /* If not NULL, this subset of blocks of the program to be | 539 /* If not NULL, this subset of blocks of the program to be |
540 considered for analysis. At certain times, this will contain all | 540 considered for analysis. At certain times, this will contain all |
541 the blocks in the function so it cannot be used as an indicator | 541 the blocks in the function so it cannot be used as an indicator |
542 of if we are analyzing a subset. See analyze_subset. */ | 542 of if we are analyzing a subset. See analyze_subset. */ |
543 bitmap blocks_to_analyze; | 543 bitmap blocks_to_analyze; |
544 | 544 |
545 /* The following information is really the problem data for the | 545 /* The following information is really the problem data for the |
546 scanning instance but it is used too often by the other problems | 546 scanning instance but it is used too often by the other problems |
547 to keep getting it from there. */ | 547 to keep getting it from there. */ |
576 /* Insns to delete, rescan or reprocess the notes at next | 576 /* Insns to delete, rescan or reprocess the notes at next |
577 df_rescan_all or df_process_deferred_rescans. */ | 577 df_rescan_all or df_process_deferred_rescans. */ |
578 bitmap insns_to_delete; | 578 bitmap insns_to_delete; |
579 bitmap insns_to_rescan; | 579 bitmap insns_to_rescan; |
580 bitmap insns_to_notes_rescan; | 580 bitmap insns_to_notes_rescan; |
581 int *postorder; /* The current set of basic blocks | 581 int *postorder; /* The current set of basic blocks |
582 in reverse postorder. */ | 582 in reverse postorder. */ |
583 int *postorder_inverted; /* The current set of basic blocks | 583 int *postorder_inverted; /* The current set of basic blocks |
584 in reverse postorder of inverted CFG. */ | 584 in reverse postorder of inverted CFG. */ |
585 int n_blocks; /* The number of blocks in reverse postorder. */ | 585 int n_blocks; /* The number of blocks in reverse postorder. */ |
586 int n_blocks_inverted; /* The number of blocks | 586 int n_blocks_inverted; /* The number of blocks |
587 in reverse postorder of inverted CFG. */ | 587 in reverse postorder of inverted CFG. */ |
588 | 588 |
589 /* An array [FIRST_PSEUDO_REGISTER], indexed by regno, of the number | 589 /* An array [FIRST_PSEUDO_REGISTER], indexed by regno, of the number |
590 of refs that qualify as being real hard regs uses. Artificial | 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 | 591 uses and defs as well as refs in eq notes are ignored. If the |
600 | 600 |
601 /* This counter provides a way to totally order refs without using | 601 /* This counter provides a way to totally order refs without using |
602 addresses. It is incremented whenever a ref is created. */ | 602 addresses. It is incremented whenever a ref is created. */ |
603 unsigned int ref_order; | 603 unsigned int ref_order; |
604 | 604 |
605 /* Problem specific control information. */ | 605 /* Problem specific control information. This is a combination of |
606 ENUM_BITFIELD (df_changeable_flags) changeable_flags : 8; | 606 enum df_changeable_flags values. */ |
607 int changeable_flags : 8; | |
607 | 608 |
608 /* If this is true, then only a subset of the blocks of the program | 609 /* If this is true, then only a subset of the blocks of the program |
609 is considered to compute the solutions of dataflow problems. */ | 610 is considered to compute the solutions of dataflow problems. */ |
610 bool analyze_subset; | 611 bool analyze_subset; |
611 | 612 |
617 #define DF_SCAN_BB_INFO(BB) (df_scan_get_bb_info((BB)->index)) | 618 #define DF_SCAN_BB_INFO(BB) (df_scan_get_bb_info((BB)->index)) |
618 #define DF_RD_BB_INFO(BB) (df_rd_get_bb_info((BB)->index)) | 619 #define DF_RD_BB_INFO(BB) (df_rd_get_bb_info((BB)->index)) |
619 #define DF_LR_BB_INFO(BB) (df_lr_get_bb_info((BB)->index)) | 620 #define DF_LR_BB_INFO(BB) (df_lr_get_bb_info((BB)->index)) |
620 #define DF_LIVE_BB_INFO(BB) (df_live_get_bb_info((BB)->index)) | 621 #define DF_LIVE_BB_INFO(BB) (df_live_get_bb_info((BB)->index)) |
621 #define DF_BYTE_LR_BB_INFO(BB) (df_byte_lr_get_bb_info((BB)->index)) | 622 #define DF_BYTE_LR_BB_INFO(BB) (df_byte_lr_get_bb_info((BB)->index)) |
623 #define DF_MD_BB_INFO(BB) (df_md_get_bb_info((BB)->index)) | |
622 | 624 |
623 /* Most transformations that wish to use live register analysis will | 625 /* Most transformations that wish to use live register analysis will |
624 use these macros. This info is the and of the lr and live sets. */ | 626 use these macros. This info is the and of the lr and live sets. */ |
625 #define DF_LIVE_IN(BB) (DF_LIVE_BB_INFO(BB)->in) | 627 #define DF_LIVE_IN(BB) (DF_LIVE_BB_INFO(BB)->in) |
626 #define DF_LIVE_OUT(BB) (DF_LIVE_BB_INFO(BB)->out) | 628 #define DF_LIVE_OUT(BB) (DF_LIVE_BB_INFO(BB)->out) |
627 | 629 |
628 /* These macros are used by passes that are not tolerant of | 630 /* These macros are used by passes that are not tolerant of |
629 uninitialized variables. This intolerance should eventually | 631 uninitialized variables. This intolerance should eventually |
630 be fixed. */ | 632 be fixed. */ |
631 #define DF_LR_IN(BB) (DF_LR_BB_INFO(BB)->in) | 633 #define DF_LR_IN(BB) (DF_LR_BB_INFO(BB)->in) |
632 #define DF_LR_OUT(BB) (DF_LR_BB_INFO(BB)->out) | 634 #define DF_LR_OUT(BB) (DF_LR_BB_INFO(BB)->out) |
633 | 635 |
634 /* These macros are used by passes that are not tolerant of | 636 /* These macros are used by passes that are not tolerant of |
635 uninitialized variables. This intolerance should eventually | 637 uninitialized variables. This intolerance should eventually |
636 be fixed. */ | 638 be fixed. */ |
637 #define DF_BYTE_LR_IN(BB) (DF_BYTE_LR_BB_INFO(BB)->in) | 639 #define DF_BYTE_LR_IN(BB) (DF_BYTE_LR_BB_INFO(BB)->in) |
638 #define DF_BYTE_LR_OUT(BB) (DF_BYTE_LR_BB_INFO(BB)->out) | 640 #define DF_BYTE_LR_OUT(BB) (DF_BYTE_LR_BB_INFO(BB)->out) |
639 | 641 |
640 /* Macros to access the elements within the ref structure. */ | 642 /* Macros to access the elements within the ref structure. */ |
641 | 643 |
642 | 644 |
643 #define DF_REF_REAL_REG(REF) (GET_CODE ((REF)->base.reg) == SUBREG \ | 645 #define DF_REF_REAL_REG(REF) (GET_CODE ((REF)->base.reg) == SUBREG \ |
670 #define DF_REF_REG_MARK(REF) (DF_REF_FLAGS_SET ((REF),DF_REF_REG_MARKER)) | 672 #define DF_REF_REG_MARK(REF) (DF_REF_FLAGS_SET ((REF),DF_REF_REG_MARKER)) |
671 #define DF_REF_REG_UNMARK(REF) (DF_REF_FLAGS_CLEAR ((REF),DF_REF_REG_MARKER)) | 673 #define DF_REF_REG_UNMARK(REF) (DF_REF_FLAGS_CLEAR ((REF),DF_REF_REG_MARKER)) |
672 #define DF_REF_IS_REG_MARKED(REF) (DF_REF_FLAGS_IS_SET ((REF),DF_REF_REG_MARKER)) | 674 #define DF_REF_IS_REG_MARKED(REF) (DF_REF_FLAGS_IS_SET ((REF),DF_REF_REG_MARKER)) |
673 #define DF_REF_NEXT_REG(REF) ((REF)->base.next_reg) | 675 #define DF_REF_NEXT_REG(REF) ((REF)->base.next_reg) |
674 #define DF_REF_PREV_REG(REF) ((REF)->base.prev_reg) | 676 #define DF_REF_PREV_REG(REF) ((REF)->base.prev_reg) |
675 /* The following two macros may only be applied if one of | 677 /* The following two macros may only be applied if one of |
676 DF_REF_SIGN_EXTRACT | DF_REF_ZERO_EXTRACT is true. */ | 678 DF_REF_SIGN_EXTRACT | DF_REF_ZERO_EXTRACT is true. */ |
677 #define DF_REF_EXTRACT_WIDTH(REF) ((REF)->extract_ref.width) | 679 #define DF_REF_EXTRACT_WIDTH(REF) ((REF)->extract_ref.width) |
678 #define DF_REF_EXTRACT_OFFSET(REF) ((REF)->extract_ref.offset) | 680 #define DF_REF_EXTRACT_OFFSET(REF) ((REF)->extract_ref.offset) |
679 #define DF_REF_EXTRACT_MODE(REF) ((REF)->extract_ref.mode) | 681 #define DF_REF_EXTRACT_MODE(REF) ((REF)->extract_ref.mode) |
680 | 682 |
681 /* Macros to determine the reference type. */ | 683 /* Macros to determine the reference type. */ |
691 #define DF_MWS_TYPE(MREF) ((MREF)->type) | 693 #define DF_MWS_TYPE(MREF) ((MREF)->type) |
692 | 694 |
693 /* Macros to get the refs out of def_info or use_info refs table. If | 695 /* Macros to get the refs out of def_info or use_info refs table. If |
694 the focus of the dataflow has been set to some subset of blocks | 696 the focus of the dataflow has been set to some subset of blocks |
695 with df_set_blocks, these macros will only find the uses and defs | 697 with df_set_blocks, these macros will only find the uses and defs |
696 in that subset of blocks. | 698 in that subset of blocks. |
697 | 699 |
698 These macros should be used with care. The def macros are only | 700 These macros should be used with care. The def macros are only |
699 usable after a call to df_maybe_reorganize_def_refs and the use | 701 usable after a call to df_maybe_reorganize_def_refs and the use |
700 macros are only usable after a call to | 702 macros are only usable after a call to |
701 df_maybe_reorganize_use_refs. HOWEVER, BUILDING AND USING THESE | 703 df_maybe_reorganize_use_refs. HOWEVER, BUILDING AND USING THESE |
787 }; | 789 }; |
788 | 790 |
789 | 791 |
790 /* Reaching definitions. All bitmaps are indexed by the id field of | 792 /* Reaching definitions. All bitmaps are indexed by the id field of |
791 the ref except sparse_kill which is indexed by regno. */ | 793 the ref except sparse_kill which is indexed by regno. */ |
792 struct df_rd_bb_info | 794 struct df_rd_bb_info |
793 { | 795 { |
794 /* Local sets to describe the basic blocks. */ | 796 /* Local sets to describe the basic blocks. */ |
795 bitmap kill; | 797 bitmap kill; |
796 bitmap sparse_kill; | 798 bitmap sparse_kill; |
797 bitmap gen; /* The set of defs generated in this block. */ | 799 bitmap gen; /* The set of defs generated in this block. */ |
798 | 800 |
799 /* The results of the dataflow problem. */ | 801 /* The results of the dataflow problem. */ |
800 bitmap in; /* At the top of the block. */ | 802 bitmap in; /* At the top of the block. */ |
801 bitmap out; /* At the bottom of the block. */ | 803 bitmap out; /* At the bottom of the block. */ |
802 }; | 804 }; |
803 | 805 |
804 | 806 |
807 /* Multiple reaching definitions. All bitmaps are referenced by the | |
808 register number. */ | |
809 | |
810 struct df_md_bb_info | |
811 { | |
812 /* Local sets to describe the basic blocks. */ | |
813 bitmap gen; /* Partial/conditional definitions live at BB out. */ | |
814 bitmap kill; /* Other definitions that are live at BB out. */ | |
815 bitmap init; /* Definitions coming from dominance frontier edges. */ | |
816 | |
817 /* The results of the dataflow problem. */ | |
818 bitmap in; /* Just before the block itself. */ | |
819 bitmap out; /* At the bottom of the block. */ | |
820 }; | |
821 | |
822 | |
805 /* Live registers, a backwards dataflow problem. All bitmaps are | 823 /* Live registers, a backwards dataflow problem. All bitmaps are |
806 referenced by the register number. */ | 824 referenced by the register number. */ |
807 | 825 |
808 struct df_lr_bb_info | 826 struct df_lr_bb_info |
809 { | 827 { |
810 /* Local sets to describe the basic blocks. */ | 828 /* Local sets to describe the basic blocks. */ |
811 bitmap def; /* The set of registers set in this block | 829 bitmap def; /* The set of registers set in this block |
812 - except artificial defs at the top. */ | 830 - except artificial defs at the top. */ |
813 bitmap use; /* The set of registers used in this block. */ | 831 bitmap use; /* The set of registers used in this block. */ |
814 | 832 |
815 /* The results of the dataflow problem. */ | 833 /* The results of the dataflow problem. */ |
816 bitmap in; /* Just before the block itself. */ | 834 bitmap in; /* Just before the block itself. */ |
820 | 838 |
821 /* Uninitialized registers. All bitmaps are referenced by the | 839 /* Uninitialized registers. All bitmaps are referenced by the |
822 register number. Anded results of the forwards and backward live | 840 register number. Anded results of the forwards and backward live |
823 info. Note that the forwards live information is not available | 841 info. Note that the forwards live information is not available |
824 separately. */ | 842 separately. */ |
825 struct df_live_bb_info | 843 struct df_live_bb_info |
826 { | 844 { |
827 /* Local sets to describe the basic blocks. */ | 845 /* Local sets to describe the basic blocks. */ |
828 bitmap kill; /* The set of registers unset in this block. Calls, | 846 bitmap kill; /* The set of registers unset in this block. Calls, |
829 for instance, unset registers. */ | 847 for instance, unset registers. */ |
830 bitmap gen; /* The set of registers set in this block. */ | 848 bitmap gen; /* The set of registers set in this block. */ |
836 | 854 |
837 | 855 |
838 /* Live registers, a backwards dataflow problem. These bitmaps are | 856 /* Live registers, a backwards dataflow problem. These bitmaps are |
839 indexed by the df_byte_lr_offset array which is indexed by pseudo. */ | 857 indexed by the df_byte_lr_offset array which is indexed by pseudo. */ |
840 | 858 |
841 struct df_byte_lr_bb_info | 859 struct df_byte_lr_bb_info |
842 { | 860 { |
843 /* Local sets to describe the basic blocks. */ | 861 /* Local sets to describe the basic blocks. */ |
844 bitmap def; /* The set of registers set in this block | 862 bitmap def; /* The set of registers set in this block |
845 - except artificial defs at the top. */ | 863 - except artificial defs at the top. */ |
846 bitmap use; /* The set of registers used in this block. */ | 864 bitmap use; /* The set of registers used in this block. */ |
847 | 865 |
848 /* The results of the dataflow problem. */ | 866 /* The results of the dataflow problem. */ |
849 bitmap in; /* Just before the block itself. */ | 867 bitmap in; /* Just before the block itself. */ |
851 }; | 869 }; |
852 | 870 |
853 | 871 |
854 /* This is used for debugging and for the dumpers to find the latest | 872 /* This is used for debugging and for the dumpers to find the latest |
855 instance so that the df info can be added to the dumps. This | 873 instance so that the df info can be added to the dumps. This |
856 should not be used by regular code. */ | 874 should not be used by regular code. */ |
857 extern struct df *df; | 875 extern struct df *df; |
858 #define df_scan (df->problems_by_index[DF_SCAN]) | 876 #define df_scan (df->problems_by_index[DF_SCAN]) |
859 #define df_rd (df->problems_by_index[DF_RD]) | 877 #define df_rd (df->problems_by_index[DF_RD]) |
860 #define df_lr (df->problems_by_index[DF_LR]) | 878 #define df_lr (df->problems_by_index[DF_LR]) |
861 #define df_live (df->problems_by_index[DF_LIVE]) | 879 #define df_live (df->problems_by_index[DF_LIVE]) |
862 #define df_chain (df->problems_by_index[DF_CHAIN]) | 880 #define df_chain (df->problems_by_index[DF_CHAIN]) |
863 #define df_byte_lr (df->problems_by_index[DF_BYTE_LR]) | 881 #define df_byte_lr (df->problems_by_index[DF_BYTE_LR]) |
864 #define df_note (df->problems_by_index[DF_NOTE]) | 882 #define df_note (df->problems_by_index[DF_NOTE]) |
883 #define df_md (df->problems_by_index[DF_MD]) | |
865 | 884 |
866 /* This symbol turns on checking that each modification of the cfg has | 885 /* This symbol turns on checking that each modification of the cfg has |
867 been identified to the appropriate df routines. It is not part of | 886 been identified to the appropriate df routines. It is not part of |
868 verification per se because the check that the final solution has | 887 verification per se because the check that the final solution has |
869 not changed covers this. However, if the solution is not being | 888 not changed covers this. However, if the solution is not being |
876 | 895 |
877 | 896 |
878 /* Functions defined in df-core.c. */ | 897 /* Functions defined in df-core.c. */ |
879 | 898 |
880 extern void df_add_problem (struct df_problem *); | 899 extern void df_add_problem (struct df_problem *); |
881 extern enum df_changeable_flags df_set_flags (enum df_changeable_flags); | 900 extern int df_set_flags (int); |
882 extern enum df_changeable_flags df_clear_flags (enum df_changeable_flags); | 901 extern int df_clear_flags (int); |
883 extern void df_set_blocks (bitmap); | 902 extern void df_set_blocks (bitmap); |
884 extern void df_remove_problem (struct dataflow *); | 903 extern void df_remove_problem (struct dataflow *); |
885 extern void df_finish_pass (bool); | 904 extern void df_finish_pass (bool); |
886 extern void df_analyze_problem (struct dataflow *, bitmap, int *, int); | 905 extern void df_analyze_problem (struct dataflow *, bitmap, int *, int); |
887 extern void df_analyze (void); | 906 extern void df_analyze (void); |
937 extern bitmap df_get_live_out (basic_block); | 956 extern bitmap df_get_live_out (basic_block); |
938 extern void df_grow_bb_info (struct dataflow *); | 957 extern void df_grow_bb_info (struct dataflow *); |
939 extern void df_chain_dump (struct df_link *, FILE *); | 958 extern void df_chain_dump (struct df_link *, FILE *); |
940 extern void df_print_bb_index (basic_block bb, FILE *file); | 959 extern void df_print_bb_index (basic_block bb, FILE *file); |
941 extern void df_rd_add_problem (void); | 960 extern void df_rd_add_problem (void); |
961 extern void df_rd_simulate_artificial_defs_at_top (basic_block, bitmap); | |
962 extern void df_rd_simulate_one_insn (basic_block, rtx, bitmap); | |
942 extern void df_lr_add_problem (void); | 963 extern void df_lr_add_problem (void); |
943 extern void df_lr_verify_transfer_functions (void); | 964 extern void df_lr_verify_transfer_functions (void); |
944 extern void df_live_verify_transfer_functions (void); | 965 extern void df_live_verify_transfer_functions (void); |
945 extern void df_live_add_problem (void); | 966 extern void df_live_add_problem (void); |
946 extern void df_live_set_all_dirty (void); | 967 extern void df_live_set_all_dirty (void); |
947 extern void df_chain_add_problem (enum df_chain_flags); | 968 extern void df_chain_add_problem (unsigned int); |
948 extern void df_byte_lr_add_problem (void); | 969 extern void df_byte_lr_add_problem (void); |
949 extern int df_byte_lr_get_regno_start (unsigned int); | 970 extern int df_byte_lr_get_regno_start (unsigned int); |
950 extern int df_byte_lr_get_regno_len (unsigned int); | 971 extern int df_byte_lr_get_regno_len (unsigned int); |
951 extern void df_byte_lr_simulate_defs (rtx, bitmap); | 972 extern void df_byte_lr_simulate_defs (rtx, bitmap); |
952 extern void df_byte_lr_simulate_uses (rtx, bitmap); | 973 extern void df_byte_lr_simulate_uses (rtx, bitmap); |
953 extern void df_byte_lr_simulate_artificial_refs_at_top (basic_block, bitmap); | 974 extern void df_byte_lr_simulate_artificial_refs_at_top (basic_block, bitmap); |
954 extern void df_byte_lr_simulate_artificial_refs_at_end (basic_block, bitmap); | 975 extern void df_byte_lr_simulate_artificial_refs_at_end (basic_block, bitmap); |
955 extern void df_note_add_problem (void); | 976 extern void df_note_add_problem (void); |
977 extern void df_md_add_problem (void); | |
978 extern void df_md_simulate_artificial_defs_at_top (basic_block, bitmap); | |
979 extern void df_md_simulate_one_insn (basic_block, rtx, bitmap); | |
956 extern void df_simulate_find_defs (rtx, bitmap); | 980 extern void df_simulate_find_defs (rtx, bitmap); |
957 extern void df_simulate_defs (rtx, bitmap); | 981 extern void df_simulate_defs (rtx, bitmap); |
958 extern void df_simulate_uses (rtx, bitmap); | 982 extern void df_simulate_uses (rtx, bitmap); |
959 extern void df_simulate_initialize_backwards (basic_block, bitmap); | 983 extern void df_simulate_initialize_backwards (basic_block, bitmap); |
960 extern void df_simulate_one_insn_backwards (basic_block, rtx, bitmap); | 984 extern void df_simulate_one_insn_backwards (basic_block, rtx, bitmap); |
961 extern void df_simulate_finalize_backwards (basic_block, bitmap); | 985 extern void df_simulate_finalize_backwards (basic_block, bitmap); |
962 extern void df_simulate_initialize_forwards (basic_block, bitmap); | 986 extern void df_simulate_initialize_forwards (basic_block, bitmap); |
963 extern void df_simulate_one_insn_forwards (basic_block, rtx, bitmap); | 987 extern void df_simulate_one_insn_forwards (basic_block, rtx, bitmap); |
964 extern void df_simulate_finalize_forwards (basic_block, bitmap); | |
965 | 988 |
966 /* Functions defined in df-scan.c. */ | 989 /* Functions defined in df-scan.c. */ |
967 | 990 |
968 extern void df_scan_alloc (bitmap); | 991 extern void df_scan_alloc (bitmap); |
969 extern void df_scan_add_problem (void); | 992 extern void df_scan_add_problem (void); |
970 extern void df_grow_reg_info (void); | 993 extern void df_grow_reg_info (void); |
971 extern void df_grow_insn_info (void); | 994 extern void df_grow_insn_info (void); |
972 extern void df_scan_blocks (void); | 995 extern void df_scan_blocks (void); |
973 extern df_ref df_ref_create (rtx, rtx *, rtx,basic_block, | 996 extern df_ref df_ref_create (rtx, rtx *, rtx,basic_block, |
974 enum df_ref_type, enum df_ref_flags, | 997 enum df_ref_type, int ref_flags, |
975 int, int, enum machine_mode); | 998 int, int, enum machine_mode); |
976 extern void df_ref_remove (df_ref); | 999 extern void df_ref_remove (df_ref); |
977 extern struct df_insn_info * df_insn_create_insn_record (rtx); | 1000 extern struct df_insn_info * df_insn_create_insn_record (rtx); |
978 extern void df_insn_delete (basic_block, unsigned int); | 1001 extern void df_insn_delete (basic_block, unsigned int); |
979 extern void df_bb_refs_record (int, bool); | 1002 extern void df_bb_refs_record (int, bool); |
980 extern bool df_insn_rescan (rtx); | 1003 extern bool df_insn_rescan (rtx); |
1004 extern bool df_insn_rescan_debug_internal (rtx); | |
981 extern void df_insn_rescan_all (void); | 1005 extern void df_insn_rescan_all (void); |
982 extern void df_process_deferred_rescans (void); | 1006 extern void df_process_deferred_rescans (void); |
983 extern void df_recompute_luids (basic_block); | 1007 extern void df_recompute_luids (basic_block); |
984 extern void df_insn_change_bb (rtx, basic_block); | 1008 extern void df_insn_change_bb (rtx, basic_block); |
985 extern void df_maybe_reorganize_use_refs (enum df_ref_order); | 1009 extern void df_maybe_reorganize_use_refs (enum df_ref_order); |
997 extern void df_compute_regs_ever_live (bool); | 1021 extern void df_compute_regs_ever_live (bool); |
998 extern bool df_read_modify_subreg_p (rtx); | 1022 extern bool df_read_modify_subreg_p (rtx); |
999 extern void df_scan_verify (void); | 1023 extern void df_scan_verify (void); |
1000 | 1024 |
1001 /* Functions defined in df-byte-scan.c. */ | 1025 /* Functions defined in df-byte-scan.c. */ |
1002 extern bool df_compute_accessed_bytes (df_ref, enum df_mm, | 1026 extern bool df_compute_accessed_bytes (df_ref, enum df_mm, |
1003 unsigned int *, unsigned int *); | 1027 unsigned int *, unsigned int *); |
1004 | 1028 |
1005 | 1029 |
1006 /* Get basic block info. */ | 1030 /* Get basic block info. */ |
1007 | 1031 |
1030 return (struct df_lr_bb_info *) df_lr->block_info[index]; | 1054 return (struct df_lr_bb_info *) df_lr->block_info[index]; |
1031 else | 1055 else |
1032 return NULL; | 1056 return NULL; |
1033 } | 1057 } |
1034 | 1058 |
1059 static inline struct df_md_bb_info * | |
1060 df_md_get_bb_info (unsigned int index) | |
1061 { | |
1062 if (index < df_md->block_info_size) | |
1063 return (struct df_md_bb_info *) df_md->block_info[index]; | |
1064 else | |
1065 return NULL; | |
1066 } | |
1067 | |
1035 static inline struct df_live_bb_info * | 1068 static inline struct df_live_bb_info * |
1036 df_live_get_bb_info (unsigned int index) | 1069 df_live_get_bb_info (unsigned int index) |
1037 { | 1070 { |
1038 if (index < df_live->block_info_size) | 1071 if (index < df_live->block_info_size) |
1039 return (struct df_live_bb_info *) df_live->block_info[index]; | 1072 return (struct df_live_bb_info *) df_live->block_info[index]; |