gcc/dumpfile.h

   1 /* Definitions for the shared dumpfile.
   2    Copyright (C) 2004-2018 Free Software Foundation, Inc.
   3
   4 This file is part of GCC.
   5
   6 GCC is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 3, or (at your option)
   9 any later version.
  10
  11 GCC is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GCC; see the file COPYING3.  If not see
  18 <http://www.gnu.org/licenses/>.  */
  19
  20
  21 #ifndef GCC_DUMPFILE_H
  22 #define GCC_DUMPFILE_H 1
  23
  24 #include "profile-count.h"
  25
  26 /* Different tree dump places.  When you add new tree dump places,
  27    extend the DUMP_FILES array in dumpfile.c.  */
  28 enum tree_dump_index
  29 {
  30   TDI_none,                     /* No dump */
  31   TDI_cgraph,                   /* dump function call graph.  */
  32   TDI_inheritance,              /* dump type inheritance graph.  */
  33   TDI_clones,                   /* dump IPA cloning decisions.  */
  34   TDI_original,                 /* dump each function before optimizing it */
  35   TDI_gimple,                   /* dump each function after gimplifying it */
  36   TDI_nested,                   /* dump each function after unnesting it */
  37   TDI_lto_stream_out,           /* dump information about lto streaming */
  38
  39   TDI_lang_all,                 /* enable all the language dumps.  */
  40   TDI_tree_all,                 /* enable all the GENERIC/GIMPLE dumps.  */
  41   TDI_rtl_all,                  /* enable all the RTL dumps.  */
  42   TDI_ipa_all,                  /* enable all the IPA dumps.  */
  43
  44   TDI_end
  45 };
  46
  47 /* Enum used to distinguish dump files to types.  */
  48
  49 enum dump_kind
  50 {
  51   DK_none,
  52   DK_lang,
  53   DK_tree,
  54   DK_rtl,
  55   DK_ipa
  56 };
  57
  58 /* Bit masks to control dumping. Not all values are applicable to all
  59    dumps. Add new ones at the end. When you define new values, extend
  60    the DUMP_OPTIONS array in dumpfile.c. The TDF_* flags coexist with
  61    MSG_* flags (for -fopt-info) and the bit values must be chosen to
  62    allow that.  */
  63 enum dump_flag
  64 {
  65   /* Value of TDF_NONE is used just for bits filtered by TDF_KIND_MASK.  */
  66   TDF_NONE  = 0,
  67
  68   /* Dump node addresses.  */
  69   TDF_ADDRESS = (1 << 0),
  70
  71   /* Don't go wild following links.  */
  72   TDF_SLIM = (1 << 1),
  73
  74   /* Don't unparse the function.  */
  75   TDF_RAW = (1 << 2),
  76
  77   /* Show more detailed info about each pass.  */
  78   TDF_DETAILS = (1 << 3),
  79
  80   /* Dump various statistics about each pass.  */
  81   TDF_STATS = (1 << 4),
  82
  83   /* Display basic block boundaries.  */
  84   TDF_BLOCKS = (1 << 5),
  85
  86   /* Display virtual operands.  */
  87   TDF_VOPS = (1 << 6),
  88
  89   /* Display statement line numbers.  */
  90   TDF_LINENO = (1 << 7),
  91
  92   /* Display decl UIDs.  */
  93   TDF_UID  = (1 << 8),
  94
  95   /* Address of stmt.  */
  96   TDF_STMTADDR = (1 << 9),
  97
  98   /* A graph dump is being emitted.  */
  99   TDF_GRAPH = (1 << 10),
 100
 101   /* Display memory symbols in expr.
 102      Implies TDF_VOPS.  */
 103   TDF_MEMSYMS = (1 << 11),
 104
 105   /* A flag to only print the RHS of a gimple stmt.  */
 106   TDF_RHS_ONLY = (1 << 12),
 107
 108   /* Display asm names of decls.  */
 109   TDF_ASMNAME = (1 << 13),
 110
 111   /* Display EH region number holding this gimple statement.  */
 112   TDF_EH  = (1 << 14),
 113
 114   /* Omit UIDs from dumps.  */
 115   TDF_NOUID = (1 << 15),
 116
 117   /* Display alias information.  */
 118   TDF_ALIAS = (1 << 16),
 119
 120   /* Enumerate locals by uid.  */
 121   TDF_ENUMERATE_LOCALS = (1 << 17),
 122
 123   /* Dump cselib details.  */
 124   TDF_CSELIB = (1 << 18),
 125
 126   /* Dump SCEV details.  */
 127   TDF_SCEV = (1 << 19),
 128
 129   /* Dump in GIMPLE FE syntax  */
 130   TDF_GIMPLE = (1 << 20),
 131
 132   /* Dump folding details.  */
 133   TDF_FOLDING = (1 << 21),
 134
 135   /* -fopt-info optimized sources.  */
 136   MSG_OPTIMIZED_LOCATIONS = (1 << 22),
 137
 138   /* Missed opportunities.  */
 139   MSG_MISSED_OPTIMIZATION = (1 << 23),
 140
 141   /* General optimization info.  */
 142   MSG_NOTE = (1 << 24),
 143
 144   MSG_ALL = (MSG_OPTIMIZED_LOCATIONS
 145              | MSG_MISSED_OPTIMIZATION
 146              | MSG_NOTE),
 147
 148   /* Dumping for -fcompare-debug.  */
 149   TDF_COMPARE_DEBUG = (1 << 25),
 150
 151   /* All values.  */
 152   TDF_ALL_VALUES = (1 << 26) - 1
 153 };
 154
 155 /* Dump flags type.  */
 156
 157 typedef enum dump_flag dump_flags_t;
 158
 159 static inline dump_flags_t
 160 operator| (dump_flags_t lhs, dump_flags_t rhs)
 161 {
 162   return (dump_flags_t)((int)lhs | (int)rhs);
 163 }
 164
 165 static inline dump_flags_t
 166 operator& (dump_flags_t lhs, dump_flags_t rhs)
 167 {
 168   return (dump_flags_t)((int)lhs & (int)rhs);
 169 }
 170
 171 static inline dump_flags_t
 172 operator~ (dump_flags_t flags)
 173 {
 174   return (dump_flags_t)~((int)flags);
 175 }
 176
 177 static inline dump_flags_t &
 178 operator|= (dump_flags_t &lhs, dump_flags_t rhs)
 179 {
 180   lhs = (dump_flags_t)((int)lhs | (int)rhs);
 181   return lhs;
 182 }
 183
 184 static inline dump_flags_t &
 185 operator&= (dump_flags_t &lhs, dump_flags_t rhs)
 186 {
 187   lhs = (dump_flags_t)((int)lhs & (int)rhs);
 188   return lhs;
 189 }
 190
 191 /* Flags to control high-level -fopt-info dumps.  Usually these flags
 192    define a group of passes.  An optimization pass can be part of
 193    multiple groups.  */
 194
 195 enum optgroup_flag
 196 {
 197   OPTGROUP_NONE = 0,
 198
 199   /* IPA optimization passes */
 200   OPTGROUP_IPA  = (1 << 1),
 201
 202   /* Loop optimization passes */
 203   OPTGROUP_LOOP = (1 << 2),
 204
 205   /* Inlining passes */
 206   OPTGROUP_INLINE = (1 << 3),
 207
 208   /* OMP (Offloading and Multi Processing) transformations */
 209   OPTGROUP_OMP = (1 << 4),
 210
 211   /* Vectorization passes */
 212   OPTGROUP_VEC = (1 << 5),
 213
 214   /* All other passes */
 215   OPTGROUP_OTHER = (1 << 6),
 216
 217   OPTGROUP_ALL = (OPTGROUP_IPA | OPTGROUP_LOOP | OPTGROUP_INLINE
 218                   | OPTGROUP_OMP | OPTGROUP_VEC | OPTGROUP_OTHER)
 219 };
 220
 221 typedef enum optgroup_flag optgroup_flags_t;
 222
 223 static inline optgroup_flags_t
 224 operator| (optgroup_flags_t lhs, optgroup_flags_t rhs)
 225 {
 226   return (optgroup_flags_t)((int)lhs | (int)rhs);
 227 }
 228
 229 static inline optgroup_flags_t &
 230 operator|= (optgroup_flags_t &lhs, optgroup_flags_t rhs)
 231 {
 232   lhs = (optgroup_flags_t)((int)lhs | (int)rhs);
 233   return lhs;
 234 }
 235
 236 /* Define a tree dump switch.  */
 237 struct dump_file_info
 238 {
 239   /* Suffix to give output file.  */
 240   const char *suffix;
 241   /* Command line dump switch.  */
 242   const char *swtch;
 243   /* Command line glob.  */
 244   const char *glob;
 245   /* Filename for the pass-specific stream.  */
 246   const char *pfilename;
 247   /* Filename for the -fopt-info stream.  */
 248   const char *alt_filename;
 249   /* Pass-specific dump stream.  */
 250   FILE *pstream;
 251   /* -fopt-info stream.  */
 252   FILE *alt_stream;
 253   /* Dump kind.  */
 254   dump_kind dkind;
 255   /* Dump flags.  */
 256   dump_flags_t pflags;
 257   /* A pass flags for -fopt-info.  */
 258   dump_flags_t alt_flags;
 259   /* Flags for -fopt-info given by a user.  */
 260   optgroup_flags_t optgroup_flags;
 261   /* State of pass-specific stream.  */
 262   int pstate;
 263   /* State of the -fopt-info stream.  */
 264   int alt_state;
 265   /* Dump file number.  */
 266   int num;
 267   /* Fields "suffix", "swtch", "glob" can be const strings,
 268      or can be dynamically allocated, needing free.  */
 269   bool owns_strings;
 270   /* When a given dump file is being initialized, this flag is set to true
 271      if the corresponding TDF_graph dump file has also been initialized.  */
 272   bool graph_dump_initialized;
 273 };
 274
 275 /* A class for describing where in the user's source that a dump message
 276    relates to, with various constructors for convenience.
 277    In particular, this lets us associate dump messages
 278    with hotness information (e.g. from PGO), allowing them to
 279    be prioritized by code hotness.  */
 280
 281 class dump_user_location_t
 282 {
 283  public:
 284   /* Default constructor, analogous to UNKNOWN_LOCATION.  */
 285   dump_user_location_t () : m_count (), m_loc (UNKNOWN_LOCATION) {}
 286
 287   /* Construct from a gimple statement (using its location and hotness).  */
 288   dump_user_location_t (gimple *stmt);
 289
 290   /* Construct from an RTL instruction (using its location and hotness).  */
 291   dump_user_location_t (rtx_insn *insn);
 292
 293   /* Construct from a location_t.  This one is deprecated (since it doesn't
 294      capture hotness information); it thus needs to be spelled out.  */
 295   static dump_user_location_t
 296   from_location_t (location_t loc)
 297   {
 298     return dump_user_location_t (profile_count (), loc);
 299   }
 300
 301   /* Construct from a function declaration.  This one requires spelling out
 302      to avoid accidentally constructing from other kinds of tree.  */
 303   static dump_user_location_t
 304   from_function_decl (tree fndecl);
 305
 306   profile_count get_count () const { return m_count; }
 307   location_t get_location_t () const { return m_loc; }
 308
 309  private:
 310   /* Private ctor from count and location, for use by from_location_t.  */
 311   dump_user_location_t (profile_count count, location_t loc)
 312     : m_count (count), m_loc (loc)
 313   {}
 314
 315   profile_count m_count;
 316   location_t m_loc;
 317 };
 318
 319 /* A class for identifying where in the compiler's own source
 320    (or a plugin) that a dump message is being emitted from.  */
 321
 322 struct dump_impl_location_t
 323 {
 324   dump_impl_location_t (
 325 #if __GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
 326                         const char *file = __builtin_FILE (),
 327                         int line = __builtin_LINE (),
 328                         const char *function = __builtin_FUNCTION ()
 329 #else
 330                         const char *file = __FILE__,
 331                         int line = __LINE__,
 332                         const char *function = NULL
 333 #endif
 334   )
 335   : m_file (file), m_line (line), m_function (function)
 336   {}
 337
 338   const char *m_file;
 339   int m_line;
 340   const char *m_function;
 341 };
 342
 343 /* A bundle of information for describing the location of a dump message:
 344    (a) the source location and hotness within the user's code, together with
 345    (b) the source location within the compiler/plugin.
 346
 347    The constructors use default parameters so that (b) gets sets up
 348    automatically.
 349
 350    The upshot is that you can pass in e.g. a gimple * to dump_printf_loc,
 351    and the dump call will automatically record where in GCC's source
 352    code the dump was emitted from.  */
 353
 354 class dump_location_t
 355 {
 356  public:
 357   /* Default constructor, analogous to UNKNOWN_LOCATION.  */
 358   dump_location_t (const dump_impl_location_t &impl_location
 359                      = dump_impl_location_t ())
 360   : m_user_location (dump_user_location_t ()),
 361     m_impl_location (impl_location)
 362   {
 363   }
 364
 365   /* Construct from a gimple statement (using its location and hotness).  */
 366   dump_location_t (gimple *stmt,
 367                    const dump_impl_location_t &impl_location
 368                      = dump_impl_location_t ())
 369   : m_user_location (dump_user_location_t (stmt)),
 370     m_impl_location (impl_location)
 371   {
 372   }
 373
 374   /* Construct from an RTL instruction (using its location and hotness).  */
 375   dump_location_t (rtx_insn *insn,
 376                    const dump_impl_location_t &impl_location
 377                    = dump_impl_location_t ())
 378   : m_user_location (dump_user_location_t (insn)),
 379     m_impl_location (impl_location)
 380   {
 381   }
 382
 383   /* Construct from a dump_user_location_t.  */
 384   dump_location_t (const dump_user_location_t &user_location,
 385                    const dump_impl_location_t &impl_location
 386                      = dump_impl_location_t ())
 387   : m_user_location (user_location),
 388     m_impl_location (impl_location)
 389   {
 390   }
 391
 392   /* Construct from a location_t.  This one is deprecated (since it doesn't
 393      capture hotness information), and thus requires spelling out.  */
 394   static dump_location_t
 395   from_location_t (location_t loc,
 396                    const dump_impl_location_t &impl_location
 397                      = dump_impl_location_t ())
 398   {
 399     return dump_location_t (dump_user_location_t::from_location_t (loc),
 400                             impl_location);
 401   }
 402
 403   const dump_user_location_t &
 404   get_user_location () const { return m_user_location; }
 405
 406   const dump_impl_location_t &
 407   get_impl_location () const { return m_impl_location; }
 408
 409   location_t get_location_t () const
 410   {
 411     return m_user_location.get_location_t ();
 412   }
 413
 414   profile_count get_count () const { return m_user_location.get_count (); }
 415
 416  private:
 417   dump_user_location_t m_user_location;
 418   dump_impl_location_t m_impl_location;
 419 };
 420
 421 /* In dumpfile.c */
 422 extern FILE *dump_begin (int, dump_flags_t *, int part=-1);
 423 extern void dump_end (int, FILE *);
 424 extern int opt_info_switch_p (const char *);
 425 extern const char *dump_flag_name (int);
 426 extern const kv_pair<optgroup_flags_t> optgroup_options[];
 427
 428 /* Global variables used to communicate with passes.  */
 429 extern FILE *dump_file;
 430 extern dump_flags_t dump_flags;
 431 extern const char *dump_file_name;
 432
 433 extern bool dumps_are_enabled;
 434
 435 extern void set_dump_file (FILE *new_dump_file);
 436
 437 /* Return true if any of the dumps is enabled, false otherwise. */
 438 static inline bool
 439 dump_enabled_p (void)
 440 {
 441   return dumps_are_enabled;
 442 }
 443
 444 /* The following API calls (which *don't* take a "FILE *")
 445    write the output to zero or more locations.
 446
 447    Some destinations are written to immediately as dump_* calls
 448    are made; for others, the output is consolidated into an "optinfo"
 449    instance (with its own metadata), and only emitted once the optinfo
 450    is complete.
 451
 452    The destinations are:
 453
 454    (a) the "immediate" destinations:
 455        (a.1) the active dump_file, if any
 456        (a.2) the -fopt-info destination, if any
 457    (b) the "optinfo" destinations, if any:
 458        (b.1) as optimization records
 459
 460    dump_* (MSG_*) --> dumpfile.c --> items --> (a.1) dump_file
 461                                        |   `-> (a.2) alt_dump_file
 462                                        |
 463                                        `--> (b) optinfo
 464                                                 `---> optinfo destinations
 465                                                       (b.1) optimization records
 466
 467    For optinfos, the dump_*_loc mark the beginning of an optinfo
 468    instance: all subsequent dump_* calls are consolidated into
 469    that optinfo, until the next dump_*_loc call (or a change in
 470    dump scope, or a call to dumpfile_ensure_any_optinfo_are_flushed).
 471
 472    A group of dump_* calls should be guarded by:
 473
 474      if (dump_enabled_p ())
 475
 476    to minimize the work done for the common case where dumps
 477    are disabled.  */
 478
 479 extern void dump_printf (dump_flags_t, const char *, ...) ATTRIBUTE_PRINTF_2;
 480 extern void dump_printf_loc (dump_flags_t, const dump_location_t &,
 481                              const char *, ...) ATTRIBUTE_PRINTF_3;
 482 extern void dump_function (int phase, tree fn);
 483 extern void dump_basic_block (dump_flags_t, basic_block, int);
 484 extern void dump_generic_expr_loc (dump_flags_t, const dump_location_t &,
 485                                    dump_flags_t, tree);
 486 extern void dump_generic_expr (dump_flags_t, dump_flags_t, tree);
 487 extern void dump_gimple_stmt_loc (dump_flags_t, const dump_location_t &,
 488                                   dump_flags_t, gimple *, int);
 489 extern void dump_gimple_stmt (dump_flags_t, dump_flags_t, gimple *, int);
 490 extern void dump_gimple_expr_loc (dump_flags_t, const dump_location_t &,
 491                                   dump_flags_t, gimple *, int);
 492 extern void dump_gimple_expr (dump_flags_t, dump_flags_t, gimple *, int);
 493 extern void dump_symtab_node (dump_flags_t, symtab_node *);
 494
 495 template<unsigned int N, typename C>
 496 void dump_dec (dump_flags_t, const poly_int<N, C> &);
 497 extern void dump_dec (dump_flags_t, const poly_wide_int &, signop);
 498 extern void dump_hex (dump_flags_t, const poly_wide_int &);
 499
 500 extern void dumpfile_ensure_any_optinfo_are_flushed ();
 501
 502 /* Managing nested scopes, so that dumps can express the call chain
 503    leading to a dump message.  */
 504
 505 extern unsigned int get_dump_scope_depth ();
 506 extern void dump_begin_scope (const char *name, const dump_location_t &loc);
 507 extern void dump_end_scope ();
 508
 509 /* Implementation detail of the AUTO_DUMP_SCOPE macro below.
 510
 511    A RAII-style class intended to make it easy to emit dump
 512    information about entering and exiting a collection of nested
 513    function calls.  */
 514
 515 class auto_dump_scope
 516 {
 517  public:
 518   auto_dump_scope (const char *name, dump_location_t loc)
 519   {
 520     if (dump_enabled_p ())
 521       dump_begin_scope (name, loc);
 522   }
 523   ~auto_dump_scope ()
 524   {
 525     if (dump_enabled_p ())
 526       dump_end_scope ();
 527   }
 528 };
 529
 530 /* A macro for calling:
 531      dump_begin_scope (NAME, LOC);
 532    via an RAII object, thus printing "=== MSG ===\n" to the dumpfile etc,
 533    and then calling
 534      dump_end_scope ();
 535    once the object goes out of scope, thus capturing the nesting of
 536    the scopes.  */
 537
 538 #define AUTO_DUMP_SCOPE(NAME, LOC) \
 539   auto_dump_scope scope (NAME, LOC)
 540
 541 extern void dump_function (int phase, tree fn);
 542 extern void print_combine_total_stats (void);
 543 extern bool enable_rtl_dump_file (void);
 544
 545 /* In tree-dump.c  */
 546 extern void dump_node (const_tree, dump_flags_t, FILE *);
 547
 548 /* In combine.c  */
 549 extern void dump_combine_total_stats (FILE *);
 550 /* In cfghooks.c  */
 551 extern void dump_bb (FILE *, basic_block, int, dump_flags_t);
 552
 553 namespace gcc {
 554
 555 /* A class for managing all of the various dump files used by the
 556    optimization passes.  */
 557
 558 class dump_manager
 559 {
 560 public:
 561
 562   dump_manager ();
 563   ~dump_manager ();
 564
 565   /* Register a dumpfile.
 566
 567      TAKE_OWNERSHIP determines whether callee takes ownership of strings
 568      SUFFIX, SWTCH, and GLOB. */
 569   unsigned int
 570   dump_register (const char *suffix, const char *swtch, const char *glob,
 571                  dump_kind dkind, optgroup_flags_t optgroup_flags,
 572                  bool take_ownership);
 573
 574   /* Allow languages and middle-end to register their dumps before the
 575      optimization passes.  */
 576   void
 577   register_dumps ();
 578
 579   /* Return the dump_file_info for the given phase.  */
 580   struct dump_file_info *
 581   get_dump_file_info (int phase) const;
 582
 583   struct dump_file_info *
 584   get_dump_file_info_by_switch (const char *swtch) const;
 585
 586   /* Return the name of the dump file for the given phase.
 587      If the dump is not enabled, returns NULL.  */
 588   char *
 589   get_dump_file_name (int phase, int part = -1) const;
 590
 591   char *
 592   get_dump_file_name (struct dump_file_info *dfi, int part = -1) const;
 593
 594   int
 595   dump_switch_p (const char *arg);
 596
 597   /* Start a dump for PHASE. Store user-supplied dump flags in
 598      *FLAG_PTR.  Return the number of streams opened.  Set globals
 599      DUMP_FILE, and ALT_DUMP_FILE to point to the opened streams, and
 600      set dump_flags appropriately for both pass dump stream and
 601      -fopt-info stream. */
 602   int
 603   dump_start (int phase, dump_flags_t *flag_ptr);
 604
 605   /* Finish a tree dump for PHASE and close associated dump streams.  Also
 606      reset the globals DUMP_FILE, ALT_DUMP_FILE, and DUMP_FLAGS.  */
 607   void
 608   dump_finish (int phase);
 609
 610   FILE *
 611   dump_begin (int phase, dump_flags_t *flag_ptr, int part);
 612
 613   /* Returns nonzero if tree dump PHASE has been initialized.  */
 614   int
 615   dump_initialized_p (int phase) const;
 616
 617   /* Returns the switch name of PHASE.  */
 618   const char *
 619   dump_flag_name (int phase) const;
 620
 621 private:
 622
 623   int
 624   dump_phase_enabled_p (int phase) const;
 625
 626   int
 627   dump_switch_p_1 (const char *arg, struct dump_file_info *dfi, bool doglob);
 628
 629   int
 630   dump_enable_all (dump_kind dkind, dump_flags_t flags, const char *filename);
 631
 632   int
 633   opt_info_enable_passes (optgroup_flags_t optgroup_flags, dump_flags_t flags,
 634                           const char *filename);
 635
 636 private:
 637
 638   /* Dynamically registered dump files and switches.  */
 639   int m_next_dump;
 640   struct dump_file_info *m_extra_dump_files;
 641   size_t m_extra_dump_files_in_use;
 642   size_t m_extra_dump_files_alloced;
 643
 644   /* Grant access to dump_enable_all.  */
 645   friend bool ::enable_rtl_dump_file (void);
 646
 647   /* Grant access to opt_info_enable_passes.  */
 648   friend int ::opt_info_switch_p (const char *arg);
 649
 650 }; // class dump_manager
 651
 652 } // namespace gcc
 653
 654 #endif /* GCC_DUMPFILE_H */