gcc/coretypes.h

   1 /* GCC core type declarations.
   2    Copyright (C) 2002-2021 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 it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 3, or (at your option) any later
   9 version.
  10
  11 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 Under Section 7 of GPL version 3, you are granted additional
  17 permissions described in the GCC Runtime Library Exception, version
  18 3.1, as published by the Free Software Foundation.
  19
  20 You should have received a copy of the GNU General Public License and
  21 a copy of the GCC Runtime Library Exception along with this program;
  22 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 <http://www.gnu.org/licenses/>.  */
  24
  25 /* Provide forward declarations of core types which are referred to by
  26    most of the compiler.  This allows header files to use these types
  27    (e.g. in function prototypes) without concern for whether the full
  28    definitions are visible.  Some other declarations that need to be
  29    universally visible are here, too.
  30
  31    In the context of tconfig.h, most of these have special definitions
  32    which prevent them from being used except in further type
  33    declarations.  This is a kludge; the right thing is to avoid
  34    including the "tm.h" header set in the context of tconfig.h, but
  35    we're not there yet.  */
  36
  37 #ifndef GCC_CORETYPES_H
  38 #define GCC_CORETYPES_H
  39
  40 #ifndef GTY
  41 #define GTY(x)  /* nothing - marker for gengtype */
  42 #endif
  43
  44 #ifndef USED_FOR_TARGET
  45
  46 typedef int64_t gcov_type;
  47 typedef uint64_t gcov_type_unsigned;
  48
  49 struct bitmap_obstack;
  50 class bitmap_head;
  51 typedef class bitmap_head *bitmap;
  52 typedef const class bitmap_head *const_bitmap;
  53 struct simple_bitmap_def;
  54 typedef struct simple_bitmap_def *sbitmap;
  55 typedef const struct simple_bitmap_def *const_sbitmap;
  56 struct rtx_def;
  57 typedef struct rtx_def *rtx;
  58 typedef const struct rtx_def *const_rtx;
  59 class scalar_mode;
  60 class scalar_int_mode;
  61 class scalar_float_mode;
  62 class complex_mode;
  63 class fixed_size_mode;
  64 template<typename> class opt_mode;
  65 typedef opt_mode<scalar_mode> opt_scalar_mode;
  66 typedef opt_mode<scalar_int_mode> opt_scalar_int_mode;
  67 typedef opt_mode<scalar_float_mode> opt_scalar_float_mode;
  68 template<typename> struct pod_mode;
  69 typedef pod_mode<scalar_mode> scalar_mode_pod;
  70 typedef pod_mode<scalar_int_mode> scalar_int_mode_pod;
  71 typedef pod_mode<fixed_size_mode> fixed_size_mode_pod;
  72
  73 /* Subclasses of rtx_def, using indentation to show the class
  74    hierarchy, along with the relevant invariant.
  75    Where possible, keep this list in the same order as in rtl.def.  */
  76 struct rtx_def;
  77   struct rtx_expr_list;           /* GET_CODE (X) == EXPR_LIST */
  78   struct rtx_insn_list;           /* GET_CODE (X) == INSN_LIST */
  79   struct rtx_sequence;            /* GET_CODE (X) == SEQUENCE */
  80   struct rtx_insn;
  81     struct rtx_debug_insn;      /* DEBUG_INSN_P (X) */
  82     struct rtx_nonjump_insn;    /* NONJUMP_INSN_P (X) */
  83     struct rtx_jump_insn;       /* JUMP_P (X) */
  84     struct rtx_call_insn;       /* CALL_P (X) */
  85     struct rtx_jump_table_data; /* JUMP_TABLE_DATA_P (X) */
  86     struct rtx_barrier;         /* BARRIER_P (X) */
  87     struct rtx_code_label;      /* LABEL_P (X) */
  88     struct rtx_note;            /* NOTE_P (X) */
  89
  90 struct rtvec_def;
  91 typedef struct rtvec_def *rtvec;
  92 typedef const struct rtvec_def *const_rtvec;
  93 struct hwivec_def;
  94 typedef struct hwivec_def *hwivec;
  95 typedef const struct hwivec_def *const_hwivec;
  96 union tree_node;
  97 typedef union tree_node *tree;
  98 typedef const union tree_node *const_tree;
  99 struct gimple;
 100 typedef gimple *gimple_seq;
 101 struct gimple_stmt_iterator;
 102
 103 /* Forward decls for leaf gimple subclasses (for individual gimple codes).
 104    Keep this in the same order as the corresponding codes in gimple.def.  */
 105
 106 struct gcond;
 107 struct gdebug;
 108 struct ggoto;
 109 struct glabel;
 110 struct gswitch;
 111 struct gassign;
 112 struct gasm;
 113 struct gcall;
 114 struct gtransaction;
 115 struct greturn;
 116 struct gbind;
 117 struct gcatch;
 118 struct geh_filter;
 119 struct geh_mnt;
 120 struct geh_else;
 121 struct gresx;
 122 struct geh_dispatch;
 123 struct gphi;
 124 struct gtry;
 125 struct gomp_atomic_load;
 126 struct gomp_atomic_store;
 127 struct gomp_continue;
 128 struct gomp_critical;
 129 struct gomp_ordered;
 130 struct gomp_for;
 131 struct gomp_parallel;
 132 struct gomp_task;
 133 struct gomp_sections;
 134 struct gomp_single;
 135 struct gomp_target;
 136 struct gomp_teams;
 137
 138 /* Subclasses of symtab_node, using indentation to show the class
 139    hierarchy.  */
 140
 141 struct symtab_node;
 142   struct cgraph_node;
 143   struct varpool_node;
 144 struct cgraph_edge;
 145
 146 union section;
 147 typedef union section section;
 148 struct gcc_options;
 149 struct cl_target_option;
 150 struct cl_optimization;
 151 struct cl_option;
 152 struct cl_decoded_option;
 153 struct cl_option_handlers;
 154 struct diagnostic_context;
 155 class pretty_printer;
 156 class diagnostic_event_id_t;
 157 typedef const char * (*diagnostic_input_charset_callback)(const char *);
 158
 159 template<typename T> struct array_traits;
 160
 161 /* Provides a read-only bitmap view of a single integer bitmask or an
 162    array of integer bitmasks, or of a wrapper around such bitmasks.  */
 163 template<typename T, typename Traits = array_traits<T>,
 164          bool has_constant_size = Traits::has_constant_size>
 165 class bitmap_view;
 166
 167 /* Address space number for named address space support.  */
 168 typedef unsigned char addr_space_t;
 169
 170 /* The value of addr_space_t that represents the generic address space.  */
 171 #define ADDR_SPACE_GENERIC 0
 172 #define ADDR_SPACE_GENERIC_P(AS) ((AS) == ADDR_SPACE_GENERIC)
 173
 174 /* The major intermediate representations of GCC.  */
 175 enum ir_type {
 176   IR_GIMPLE,
 177   IR_RTL_CFGRTL,
 178   IR_RTL_CFGLAYOUT
 179 };
 180
 181 /* Provide forward struct declaration so that we don't have to include
 182    all of cpplib.h whenever a random prototype includes a pointer.
 183    Note that the cpp_reader and cpp_token typedefs remain part of
 184    cpplib.h.  */
 185
 186 struct cpp_reader;
 187 struct cpp_token;
 188
 189 /* The thread-local storage model associated with a given VAR_DECL
 190    or SYMBOL_REF.  This isn't used much, but both trees and RTL refer
 191    to it, so it's here.  */
 192 enum tls_model {
 193   TLS_MODEL_NONE,
 194   TLS_MODEL_EMULATED,
 195   TLS_MODEL_REAL,
 196   TLS_MODEL_GLOBAL_DYNAMIC = TLS_MODEL_REAL,
 197   TLS_MODEL_LOCAL_DYNAMIC,
 198   TLS_MODEL_INITIAL_EXEC,
 199   TLS_MODEL_LOCAL_EXEC
 200 };
 201
 202 /* Types of ABI for an offload compiler.  */
 203 enum offload_abi {
 204   OFFLOAD_ABI_UNSET,
 205   OFFLOAD_ABI_LP64,
 206   OFFLOAD_ABI_ILP32
 207 };
 208
 209 /* Types of profile update methods.  */
 210 enum profile_update {
 211   PROFILE_UPDATE_SINGLE,
 212   PROFILE_UPDATE_ATOMIC,
 213   PROFILE_UPDATE_PREFER_ATOMIC
 214 };
 215
 216 /* Type of profile reproducibility methods.  */
 217 enum profile_reproducibility {
 218     PROFILE_REPRODUCIBILITY_SERIAL,
 219     PROFILE_REPRODUCIBILITY_PARALLEL_RUNS,
 220     PROFILE_REPRODUCIBILITY_MULTITHREADED
 221 };
 222
 223 /* Type of -fstack-protector-*.  */
 224 enum stack_protector {
 225   SPCT_FLAG_DEFAULT = 1,
 226   SPCT_FLAG_ALL = 2,
 227   SPCT_FLAG_STRONG = 3,
 228   SPCT_FLAG_EXPLICIT = 4
 229 };
 230
 231 /* Types of unwind/exception handling info that can be generated.  */
 232
 233 enum unwind_info_type
 234 {
 235   UI_NONE,
 236   UI_SJLJ,
 237   UI_DWARF2,
 238   UI_TARGET,
 239   UI_SEH
 240 };
 241
 242 /* Callgraph node profile representation.  */
 243 enum node_frequency {
 244   /* This function most likely won't be executed at all.
 245      (set only when profile feedback is available or via function attribute). */
 246   NODE_FREQUENCY_UNLIKELY_EXECUTED,
 247   /* For functions that are known to be executed once (i.e. constructors, destructors
 248      and main function.  */
 249   NODE_FREQUENCY_EXECUTED_ONCE,
 250   /* The default value.  */
 251   NODE_FREQUENCY_NORMAL,
 252   /* Optimize this function hard
 253      (set only when profile feedback is available or via function attribute). */
 254   NODE_FREQUENCY_HOT
 255 };
 256
 257 /* Ways of optimizing code.  */
 258 enum optimization_type {
 259   /* Prioritize speed over size.  */
 260   OPTIMIZE_FOR_SPEED,
 261
 262   /* Only do things that are good for both size and speed.  */
 263   OPTIMIZE_FOR_BOTH,
 264
 265   /* Prioritize size over speed.  */
 266   OPTIMIZE_FOR_SIZE
 267 };
 268
 269 /* Enumerates a padding direction.  */
 270 enum pad_direction {
 271   /* No padding is required.  */
 272   PAD_NONE,
 273
 274   /* Insert padding above the data, i.e. at higher memeory addresses
 275      when dealing with memory, and at the most significant end when
 276      dealing with registers.  */
 277   PAD_UPWARD,
 278
 279   /* Insert padding below the data, i.e. at lower memeory addresses
 280      when dealing with memory, and at the least significant end when
 281      dealing with registers.  */
 282   PAD_DOWNWARD
 283 };
 284
 285 /* Possible initialization status of a variable.   When requested
 286    by the user, this information is tracked and recorded in the DWARF
 287    debug information, along with the variable's location.  */
 288 enum var_init_status
 289 {
 290   VAR_INIT_STATUS_UNKNOWN,
 291   VAR_INIT_STATUS_UNINITIALIZED,
 292   VAR_INIT_STATUS_INITIALIZED
 293 };
 294
 295 /* Names for the different levels of -Wstrict-overflow=N.  The numeric
 296    values here correspond to N.  */
 297 enum warn_strict_overflow_code
 298 {
 299   /* Overflow warning that should be issued with -Wall: a questionable
 300      construct that is easy to avoid even when using macros.  Example:
 301      folding (x + CONSTANT > x) to 1.  */
 302   WARN_STRICT_OVERFLOW_ALL = 1,
 303   /* Overflow warning about folding a comparison to a constant because
 304      of undefined signed overflow, other than cases covered by
 305      WARN_STRICT_OVERFLOW_ALL.  Example: folding (abs (x) >= 0) to 1
 306      (this is false when x == INT_MIN).  */
 307   WARN_STRICT_OVERFLOW_CONDITIONAL = 2,
 308   /* Overflow warning about changes to comparisons other than folding
 309      them to a constant.  Example: folding (x + 1 > 1) to (x > 0).  */
 310   WARN_STRICT_OVERFLOW_COMPARISON = 3,
 311   /* Overflow warnings not covered by the above cases.  Example:
 312      folding ((x * 10) / 5) to (x * 2).  */
 313   WARN_STRICT_OVERFLOW_MISC = 4,
 314   /* Overflow warnings about reducing magnitude of constants in
 315      comparison.  Example: folding (x + 2 > y) to (x + 1 >= y).  */
 316   WARN_STRICT_OVERFLOW_MAGNITUDE = 5
 317 };
 318
 319 /* The type of an alias set.  Code currently assumes that variables of
 320    this type can take the values 0 (the alias set which aliases
 321    everything) and -1 (sometimes indicating that the alias set is
 322    unknown, sometimes indicating a memory barrier) and -2 (indicating
 323    that the alias set should be set to a unique value but has not been
 324    set yet).  */
 325 typedef int alias_set_type;
 326
 327 class edge_def;
 328 typedef class edge_def *edge;
 329 typedef const class edge_def *const_edge;
 330 struct basic_block_def;
 331 typedef struct basic_block_def *basic_block;
 332 typedef const struct basic_block_def *const_basic_block;
 333
 334 #if !defined (GENERATOR_FILE)
 335 # define OBSTACK_CHUNK_SIZE     memory_block_pool::block_size
 336 # define obstack_chunk_alloc    mempool_obstack_chunk_alloc
 337 # define obstack_chunk_free     mempool_obstack_chunk_free
 338 #else
 339 # define OBSTACK_CHUNK_SIZE     0
 340 # define obstack_chunk_alloc    xmalloc
 341 # define obstack_chunk_free     free
 342 #endif
 343
 344 #define gcc_obstack_init(OBSTACK)                               \
 345   obstack_specify_allocation ((OBSTACK), OBSTACK_CHUNK_SIZE, 0, \
 346                               obstack_chunk_alloc,              \
 347                               obstack_chunk_free)
 348
 349 /* enum reg_class is target specific, so it should not appear in
 350    target-independent code or interfaces, like the target hook declarations
 351    in target.h.  */
 352 typedef int reg_class_t;
 353
 354 class rtl_opt_pass;
 355
 356 namespace gcc {
 357   class context;
 358 }
 359
 360 typedef std::pair <tree, tree> tree_pair;
 361 typedef std::pair <const char *, int> string_int_pair;
 362
 363 /* Define a name->value mapping.  */
 364 template <typename ValueType>
 365 struct kv_pair
 366 {
 367   const char *const name;       /* the name of the value */
 368   const ValueType value;        /* the value of the name */
 369 };
 370
 371 #else
 372
 373 struct _dont_use_rtx_here_;
 374 struct _dont_use_rtvec_here_;
 375 struct _dont_use_rtx_insn_here_;
 376 union _dont_use_tree_here_;
 377 #define rtx struct _dont_use_rtx_here_ *
 378 #define const_rtx struct _dont_use_rtx_here_ *
 379 #define rtvec struct _dont_use_rtvec_here *
 380 #define const_rtvec struct _dont_use_rtvec_here *
 381 #define rtx_insn struct _dont_use_rtx_insn_here_
 382 #define tree union _dont_use_tree_here_ *
 383 #define const_tree union _dont_use_tree_here_ *
 384
 385 typedef struct scalar_mode scalar_mode;
 386 typedef struct scalar_int_mode scalar_int_mode;
 387 typedef struct scalar_float_mode scalar_float_mode;
 388 typedef struct complex_mode complex_mode;
 389
 390 #endif
 391
 392 /* Classes of functions that compiler needs to check
 393    whether they are present at the runtime or not.  */
 394 enum function_class {
 395   function_c94,
 396   function_c99_misc,
 397   function_c99_math_complex,
 398   function_sincos,
 399   function_c11_misc,
 400   function_c2x_misc
 401 };
 402
 403 /* Enumerate visibility settings.  This is deliberately ordered from most
 404    to least visibility.  */
 405 enum symbol_visibility
 406 {
 407   VISIBILITY_DEFAULT,
 408   VISIBILITY_PROTECTED,
 409   VISIBILITY_HIDDEN,
 410   VISIBILITY_INTERNAL
 411 };
 412
 413 /* enums used by the targetm.excess_precision hook.  */
 414
 415 enum flt_eval_method
 416 {
 417   FLT_EVAL_METHOD_UNPREDICTABLE = -1,
 418   FLT_EVAL_METHOD_PROMOTE_TO_FLOAT = 0,
 419   FLT_EVAL_METHOD_PROMOTE_TO_DOUBLE = 1,
 420   FLT_EVAL_METHOD_PROMOTE_TO_LONG_DOUBLE = 2,
 421   FLT_EVAL_METHOD_PROMOTE_TO_FLOAT16 = 16
 422 };
 423
 424 enum excess_precision_type
 425 {
 426   EXCESS_PRECISION_TYPE_IMPLICIT,
 427   EXCESS_PRECISION_TYPE_STANDARD,
 428   EXCESS_PRECISION_TYPE_FAST,
 429   EXCESS_PRECISION_TYPE_FLOAT16
 430 };
 431
 432 /* Level of size optimization.  */
 433
 434 enum optimize_size_level
 435 {
 436   /* Do not optimize for size.  */
 437   OPTIMIZE_SIZE_NO,
 438   /* Optimize for size but not at extreme performance costs.  */
 439   OPTIMIZE_SIZE_BALANCED,
 440   /* Optimize for size as much as possible.  */
 441   OPTIMIZE_SIZE_MAX
 442 };
 443
 444 /* Support for user-provided GGC and PCH markers.  The first parameter
 445    is a pointer to a pointer, the second either NULL if the pointer to
 446    pointer points into a GC object or the actual pointer address if
 447    the first argument points to a temporary and the third a cookie.  */
 448 typedef void (*gt_pointer_operator) (void *, void *, void *);
 449
 450 #if !defined (HAVE_UCHAR)
 451 typedef unsigned char uchar;
 452 #endif
 453
 454 /* Most source files will require the following headers.  */
 455 #if !defined (USED_FOR_TARGET)
 456 #include "insn-modes.h"
 457 #include "signop.h"
 458 #include "wide-int.h"
 459 #include "wide-int-print.h"
 460
 461 /* On targets that don't need polynomial offsets, target-specific code
 462    should be able to treat poly_int like a normal constant, with a
 463    conversion operator going from the former to the latter.  We also
 464    allow this for gencondmd.c for all targets, so that we can treat
 465    machine_modes as enums without causing build failures.  */
 466 #if (defined (IN_TARGET_CODE) \
 467      && (defined (USE_ENUM_MODES) || NUM_POLY_INT_COEFFS == 1))
 468 #define POLY_INT_CONVERSION 1
 469 #else
 470 #define POLY_INT_CONVERSION 0
 471 #endif
 472
 473 #include "poly-int.h"
 474 #include "poly-int-types.h"
 475 #include "insn-modes-inline.h"
 476 #include "machmode.h"
 477 #include "double-int.h"
 478 #include "align.h"
 479 /* Most host source files will require the following headers.  */
 480 #if !defined (GENERATOR_FILE)
 481 #include "iterator-utils.h"
 482 #include "real.h"
 483 #include "fixed-value.h"
 484 #include "hash-table.h"
 485 #include "hash-set.h"
 486 #include "input.h"
 487 #include "is-a.h"
 488 #include "memory-block.h"
 489 #include "dumpfile.h"
 490 #endif
 491 #endif /* GENERATOR_FILE && !USED_FOR_TARGET */
 492
 493 #endif /* coretypes.h */