gcc/fortran/gfortran.h

   1 /* gfortran header file
   2    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
   3    2009, 2010, 2011, 2012
   4    Free Software Foundation, Inc.
   5    Contributed by Andy Vaught
   6
   7 This file is part of GCC.
   8
   9 GCC is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 3, or (at your option) any later
  12 version.
  13
  14 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License
  20 along with GCC; see the file COPYING3.  If not see
  21 <http://www.gnu.org/licenses/>.  */
  22
  23 #ifndef GCC_GFORTRAN_H
  24 #define GCC_GFORTRAN_H
  25
  26 /* It's probably insane to have this large of a header file, but it
  27    seemed like everything had to be recompiled anyway when a change
  28    was made to a header file, and there were ordering issues with
  29    multiple header files.  Besides, Microsoft's winnt.h was 250k last
  30    time I looked, so by comparison this is perfectly reasonable.  */
  31
  32 /* Declarations common to the front-end and library are put in
  33    libgfortran/libgfortran_frontend.h  */
  34 #include "libgfortran.h"
  35
  36
  37 #include "intl.h"
  38 #include "coretypes.h"
  39 #include "input.h"
  40 #include "splay-tree.h"
  41
  42 /* Major control parameters.  */
  43
  44 #define GFC_MAX_SYMBOL_LEN 63   /* Must be at least 63 for F2003.  */
  45 #define GFC_LETTERS 26          /* Number of letters in the alphabet.  */
  46
  47 #define MAX_SUBRECORD_LENGTH 2147483639   /* 2**31-9 */
  48
  49
  50 #define gfc_is_whitespace(c) ((c==' ') || (c=='\t'))
  51
  52 /* Stringization.  */
  53 #define stringize(x) expand_macro(x)
  54 #define expand_macro(x) # x
  55
  56 /* For the runtime library, a standard prefix is a requirement to
  57    avoid cluttering the namespace with things nobody asked for.  It's
  58    ugly to look at and a pain to type when you add the prefix by hand,
  59    so we hide it behind a macro.  */
  60 #define PREFIX(x) "_gfortran_" x
  61 #define PREFIX_LEN 10
  62
  63 #define BLANK_COMMON_NAME "__BLNK__"
  64
  65 /* Macro to initialize an mstring structure.  */
  66 #define minit(s, t) { s, NULL, t }
  67
  68 /* Structure for storing strings to be matched by gfc_match_string.  */
  69 typedef struct
  70 {
  71   const char *string;
  72   const char *mp;
  73   int tag;
  74 }
  75 mstring;
  76
  77
  78
  79 /*************************** Enums *****************************/
  80
  81 /* Used when matching and resolving data I/O transfer statements.  */
  82
  83 typedef enum
  84 { M_READ, M_WRITE, M_PRINT, M_INQUIRE }
  85 io_kind;
  86
  87 /* The author remains confused to this day about the convention of
  88    returning '0' for 'SUCCESS'... or was it the other way around?  The
  89    following enum makes things much more readable.  We also start
  90    values off at one instead of zero.  */
  91
  92 typedef enum
  93 { SUCCESS = 1, FAILURE }
  94 gfc_try;
  95
  96 /* These are flags for identifying whether we are reading a character literal
  97    between quotes or normal source code.  */
  98
  99 typedef enum
 100 { NONSTRING = 0, INSTRING_WARN, INSTRING_NOWARN }
 101 gfc_instring;
 102
 103 /* This is returned by gfc_notification_std to know if, given the flags
 104    that were given (-std=, -pedantic) we should issue an error, a warning
 105    or nothing.  */
 106
 107 typedef enum
 108 { SILENT, WARNING, ERROR }
 109 notification;
 110
 111 /* Matchers return one of these three values.  The difference between
 112    MATCH_NO and MATCH_ERROR is that MATCH_ERROR means that a match was
 113    successful, but that something non-syntactic is wrong and an error
 114    has already been issued.  */
 115
 116 typedef enum
 117 { MATCH_NO = 1, MATCH_YES, MATCH_ERROR }
 118 match;
 119
 120 /* Used for different Fortran source forms in places like scanner.c.  */
 121 typedef enum
 122 { FORM_FREE, FORM_FIXED, FORM_UNKNOWN }
 123 gfc_source_form;
 124
 125 /* Expression node types.  */
 126 typedef enum
 127 { EXPR_OP = 1, EXPR_FUNCTION, EXPR_CONSTANT, EXPR_VARIABLE,
 128   EXPR_SUBSTRING, EXPR_STRUCTURE, EXPR_ARRAY, EXPR_NULL, EXPR_COMPCALL, EXPR_PPC
 129 }
 130 expr_t;
 131
 132 /* Array types.  */
 133 typedef enum
 134 { AS_EXPLICIT = 1, AS_ASSUMED_SHAPE, AS_DEFERRED,
 135   AS_ASSUMED_SIZE, AS_IMPLIED_SHAPE, AS_UNKNOWN
 136 }
 137 array_type;
 138
 139 typedef enum
 140 { AR_FULL = 1, AR_ELEMENT, AR_SECTION, AR_UNKNOWN }
 141 ar_type;
 142
 143 /* Statement label types.  */
 144 typedef enum
 145 { ST_LABEL_UNKNOWN = 1, ST_LABEL_TARGET,
 146   ST_LABEL_BAD_TARGET, ST_LABEL_FORMAT
 147 }
 148 gfc_sl_type;
 149
 150 /* Intrinsic operators.  */
 151 typedef enum
 152 { GFC_INTRINSIC_BEGIN = 0,
 153   INTRINSIC_NONE = -1, INTRINSIC_UPLUS = GFC_INTRINSIC_BEGIN,
 154   INTRINSIC_UMINUS, INTRINSIC_PLUS, INTRINSIC_MINUS, INTRINSIC_TIMES,
 155   INTRINSIC_DIVIDE, INTRINSIC_POWER, INTRINSIC_CONCAT,
 156   INTRINSIC_AND, INTRINSIC_OR, INTRINSIC_EQV, INTRINSIC_NEQV,
 157   /* ==, /=, >, >=, <, <=  */
 158   INTRINSIC_EQ, INTRINSIC_NE, INTRINSIC_GT, INTRINSIC_GE,
 159   INTRINSIC_LT, INTRINSIC_LE,
 160   /* .EQ., .NE., .GT., .GE., .LT., .LE. (OS = Old-Style)  */
 161   INTRINSIC_EQ_OS, INTRINSIC_NE_OS, INTRINSIC_GT_OS, INTRINSIC_GE_OS,
 162   INTRINSIC_LT_OS, INTRINSIC_LE_OS,
 163   INTRINSIC_NOT, INTRINSIC_USER, INTRINSIC_ASSIGN,
 164   INTRINSIC_PARENTHESES, GFC_INTRINSIC_END /* Sentinel */
 165 }
 166 gfc_intrinsic_op;
 167
 168 /* This macro is the number of intrinsic operators that exist.
 169    Assumptions are made about the numbering of the interface_op enums.  */
 170 #define GFC_INTRINSIC_OPS GFC_INTRINSIC_END
 171
 172 /* Arithmetic results.  */
 173 typedef enum
 174 { ARITH_OK = 1, ARITH_OVERFLOW, ARITH_UNDERFLOW, ARITH_NAN,
 175   ARITH_DIV0, ARITH_INCOMMENSURATE, ARITH_ASYMMETRIC, ARITH_PROHIBIT
 176 }
 177 arith;
 178
 179 /* Statements.  */
 180 typedef enum
 181 {
 182   ST_ARITHMETIC_IF, ST_ALLOCATE, ST_ATTR_DECL, ST_ASSOCIATE,
 183   ST_BACKSPACE, ST_BLOCK, ST_BLOCK_DATA,
 184   ST_CALL, ST_CASE, ST_CLOSE, ST_COMMON, ST_CONTINUE, ST_CONTAINS, ST_CYCLE,
 185   ST_DATA, ST_DATA_DECL, ST_DEALLOCATE, ST_DO, ST_ELSE, ST_ELSEIF,
 186   ST_ELSEWHERE, ST_END_ASSOCIATE, ST_END_BLOCK, ST_END_BLOCK_DATA,
 187   ST_ENDDO, ST_IMPLIED_ENDDO,
 188   ST_END_FILE, ST_FINAL, ST_FLUSH, ST_END_FORALL, ST_END_FUNCTION, ST_ENDIF,
 189   ST_END_INTERFACE, ST_END_MODULE, ST_END_PROGRAM, ST_END_SELECT,
 190   ST_END_SUBROUTINE, ST_END_WHERE, ST_END_TYPE, ST_ENTRY, ST_EQUIVALENCE,
 191   ST_ERROR_STOP, ST_EXIT, ST_FORALL, ST_FORALL_BLOCK, ST_FORMAT, ST_FUNCTION,
 192   ST_GOTO, ST_IF_BLOCK, ST_IMPLICIT, ST_IMPLICIT_NONE, ST_IMPORT,
 193   ST_INQUIRE, ST_INTERFACE, ST_SYNC_ALL, ST_SYNC_MEMORY, ST_SYNC_IMAGES,
 194   ST_PARAMETER, ST_MODULE, ST_MODULE_PROC, ST_NAMELIST, ST_NULLIFY, ST_OPEN,
 195   ST_PAUSE, ST_PRIVATE, ST_PROGRAM, ST_PUBLIC, ST_READ, ST_RETURN, ST_REWIND,
 196   ST_STOP, ST_SUBROUTINE, ST_TYPE, ST_USE, ST_WHERE_BLOCK, ST_WHERE, ST_WAIT,
 197   ST_WRITE, ST_ASSIGNMENT, ST_POINTER_ASSIGNMENT, ST_SELECT_CASE, ST_SEQUENCE,
 198   ST_SIMPLE_IF, ST_STATEMENT_FUNCTION, ST_DERIVED_DECL, ST_LABEL_ASSIGNMENT,
 199   ST_ENUM, ST_ENUMERATOR, ST_END_ENUM, ST_SELECT_TYPE, ST_TYPE_IS, ST_CLASS_IS,
 200   ST_OMP_ATOMIC, ST_OMP_BARRIER, ST_OMP_CRITICAL, ST_OMP_END_ATOMIC,
 201   ST_OMP_END_CRITICAL, ST_OMP_END_DO, ST_OMP_END_MASTER, ST_OMP_END_ORDERED,
 202   ST_OMP_END_PARALLEL, ST_OMP_END_PARALLEL_DO, ST_OMP_END_PARALLEL_SECTIONS,
 203   ST_OMP_END_PARALLEL_WORKSHARE, ST_OMP_END_SECTIONS, ST_OMP_END_SINGLE,
 204   ST_OMP_END_WORKSHARE, ST_OMP_DO, ST_OMP_FLUSH, ST_OMP_MASTER, ST_OMP_ORDERED,
 205   ST_OMP_PARALLEL, ST_OMP_PARALLEL_DO, ST_OMP_PARALLEL_SECTIONS,
 206   ST_OMP_PARALLEL_WORKSHARE, ST_OMP_SECTIONS, ST_OMP_SECTION, ST_OMP_SINGLE,
 207   ST_OMP_THREADPRIVATE, ST_OMP_WORKSHARE, ST_OMP_TASK, ST_OMP_END_TASK,
 208   ST_OMP_TASKWAIT, ST_OMP_TASKYIELD, ST_PROCEDURE, ST_GENERIC, ST_CRITICAL,
 209   ST_END_CRITICAL, ST_GET_FCN_CHARACTERISTICS, ST_LOCK, ST_UNLOCK, ST_NONE
 210 }
 211 gfc_statement;
 212
 213 /* Types of interfaces that we can have.  Assignment interfaces are
 214    considered to be intrinsic operators.  */
 215 typedef enum
 216 {
 217   INTERFACE_NAMELESS = 1, INTERFACE_GENERIC,
 218   INTERFACE_INTRINSIC_OP, INTERFACE_USER_OP, INTERFACE_ABSTRACT
 219 }
 220 interface_type;
 221
 222 /* Symbol flavors: these are all mutually exclusive.
 223    10 elements = 4 bits.  */
 224 typedef enum sym_flavor
 225 {
 226   FL_UNKNOWN = 0, FL_PROGRAM, FL_BLOCK_DATA, FL_MODULE, FL_VARIABLE,
 227   FL_PARAMETER, FL_LABEL, FL_PROCEDURE, FL_DERIVED, FL_NAMELIST,
 228   FL_VOID
 229 }
 230 sym_flavor;
 231
 232 /* Procedure types.  7 elements = 3 bits.  */
 233 typedef enum procedure_type
 234 { PROC_UNKNOWN, PROC_MODULE, PROC_INTERNAL, PROC_DUMMY,
 235   PROC_INTRINSIC, PROC_ST_FUNCTION, PROC_EXTERNAL
 236 }
 237 procedure_type;
 238
 239 /* Intent types.  */
 240 typedef enum sym_intent
 241 { INTENT_UNKNOWN = 0, INTENT_IN, INTENT_OUT, INTENT_INOUT
 242 }
 243 sym_intent;
 244
 245 /* Access types.  */
 246 typedef enum gfc_access
 247 { ACCESS_UNKNOWN = 0, ACCESS_PUBLIC, ACCESS_PRIVATE
 248 }
 249 gfc_access;
 250
 251 /* Flags to keep track of where an interface came from.
 252    3 elements = 2 bits.  */
 253 typedef enum ifsrc
 254 { IFSRC_UNKNOWN = 0,    /* Interface unknown, only return type may be known.  */
 255   IFSRC_DECL,           /* FUNCTION or SUBROUTINE declaration.  */
 256   IFSRC_IFBODY          /* INTERFACE statement or PROCEDURE statement
 257                            with explicit interface.  */
 258 }
 259 ifsrc;
 260
 261 /* Whether a SAVE attribute was set explicitly or implicitly.  */
 262 typedef enum save_state
 263 { SAVE_NONE = 0, SAVE_EXPLICIT, SAVE_IMPLICIT
 264 }
 265 save_state;
 266
 267 /* Strings for all symbol attributes.  We use these for dumping the
 268    parse tree, in error messages, and also when reading and writing
 269    modules.  In symbol.c.  */
 270 extern const mstring flavors[];
 271 extern const mstring procedures[];
 272 extern const mstring intents[];
 273 extern const mstring access_types[];
 274 extern const mstring ifsrc_types[];
 275 extern const mstring save_status[];
 276
 277 /* Enumeration of all the generic intrinsic functions.  Used by the
 278    backend for identification of a function.  */
 279
 280 enum gfc_isym_id
 281 {
 282   /* GFC_ISYM_NONE is used for intrinsics which will never be seen by
 283      the backend (e.g. KIND).  */
 284   GFC_ISYM_NONE = 0,
 285   GFC_ISYM_ABORT,
 286   GFC_ISYM_ABS,
 287   GFC_ISYM_ACCESS,
 288   GFC_ISYM_ACHAR,
 289   GFC_ISYM_ACOS,
 290   GFC_ISYM_ACOSH,
 291   GFC_ISYM_ADJUSTL,
 292   GFC_ISYM_ADJUSTR,
 293   GFC_ISYM_AIMAG,
 294   GFC_ISYM_AINT,
 295   GFC_ISYM_ALARM,
 296   GFC_ISYM_ALL,
 297   GFC_ISYM_ALLOCATED,
 298   GFC_ISYM_AND,
 299   GFC_ISYM_ANINT,
 300   GFC_ISYM_ANY,
 301   GFC_ISYM_ASIN,
 302   GFC_ISYM_ASINH,
 303   GFC_ISYM_ASSOCIATED,
 304   GFC_ISYM_ATAN,
 305   GFC_ISYM_ATAN2,
 306   GFC_ISYM_ATANH,
 307   GFC_ISYM_ATOMIC_DEF,
 308   GFC_ISYM_ATOMIC_REF,
 309   GFC_ISYM_BGE,
 310   GFC_ISYM_BGT,
 311   GFC_ISYM_BIT_SIZE,
 312   GFC_ISYM_BLE,
 313   GFC_ISYM_BLT,
 314   GFC_ISYM_BTEST,
 315   GFC_ISYM_CEILING,
 316   GFC_ISYM_CHAR,
 317   GFC_ISYM_CHDIR,
 318   GFC_ISYM_CHMOD,
 319   GFC_ISYM_CMPLX,
 320   GFC_ISYM_COMMAND_ARGUMENT_COUNT,
 321   GFC_ISYM_COMPILER_OPTIONS,
 322   GFC_ISYM_COMPILER_VERSION,
 323   GFC_ISYM_COMPLEX,
 324   GFC_ISYM_CONJG,
 325   GFC_ISYM_CONVERSION,
 326   GFC_ISYM_COS,
 327   GFC_ISYM_COSH,
 328   GFC_ISYM_COUNT,
 329   GFC_ISYM_CPU_TIME,
 330   GFC_ISYM_CSHIFT,
 331   GFC_ISYM_CTIME,
 332   GFC_ISYM_C_SIZEOF,
 333   GFC_ISYM_DATE_AND_TIME,
 334   GFC_ISYM_DBLE,
 335   GFC_ISYM_DIGITS,
 336   GFC_ISYM_DIM,
 337   GFC_ISYM_DOT_PRODUCT,
 338   GFC_ISYM_DPROD,
 339   GFC_ISYM_DSHIFTL,
 340   GFC_ISYM_DSHIFTR,
 341   GFC_ISYM_DTIME,
 342   GFC_ISYM_EOSHIFT,
 343   GFC_ISYM_EPSILON,
 344   GFC_ISYM_ERF,
 345   GFC_ISYM_ERFC,
 346   GFC_ISYM_ERFC_SCALED,
 347   GFC_ISYM_ETIME,
 348   GFC_ISYM_EXECUTE_COMMAND_LINE,
 349   GFC_ISYM_EXIT,
 350   GFC_ISYM_EXP,
 351   GFC_ISYM_EXPONENT,
 352   GFC_ISYM_EXTENDS_TYPE_OF,
 353   GFC_ISYM_FDATE,
 354   GFC_ISYM_FGET,
 355   GFC_ISYM_FGETC,
 356   GFC_ISYM_FLOOR,
 357   GFC_ISYM_FLUSH,
 358   GFC_ISYM_FNUM,
 359   GFC_ISYM_FPUT,
 360   GFC_ISYM_FPUTC,
 361   GFC_ISYM_FRACTION,
 362   GFC_ISYM_FREE,
 363   GFC_ISYM_FSEEK,
 364   GFC_ISYM_FSTAT,
 365   GFC_ISYM_FTELL,
 366   GFC_ISYM_TGAMMA,
 367   GFC_ISYM_GERROR,
 368   GFC_ISYM_GETARG,
 369   GFC_ISYM_GET_COMMAND,
 370   GFC_ISYM_GET_COMMAND_ARGUMENT,
 371   GFC_ISYM_GETCWD,
 372   GFC_ISYM_GETENV,
 373   GFC_ISYM_GET_ENVIRONMENT_VARIABLE,
 374   GFC_ISYM_GETGID,
 375   GFC_ISYM_GETLOG,
 376   GFC_ISYM_GETPID,
 377   GFC_ISYM_GETUID,
 378   GFC_ISYM_GMTIME,
 379   GFC_ISYM_HOSTNM,
 380   GFC_ISYM_HUGE,
 381   GFC_ISYM_HYPOT,
 382   GFC_ISYM_IACHAR,
 383   GFC_ISYM_IALL,
 384   GFC_ISYM_IAND,
 385   GFC_ISYM_IANY,
 386   GFC_ISYM_IARGC,
 387   GFC_ISYM_IBCLR,
 388   GFC_ISYM_IBITS,
 389   GFC_ISYM_IBSET,
 390   GFC_ISYM_ICHAR,
 391   GFC_ISYM_IDATE,
 392   GFC_ISYM_IEOR,
 393   GFC_ISYM_IERRNO,
 394   GFC_ISYM_IMAGE_INDEX,
 395   GFC_ISYM_INDEX,
 396   GFC_ISYM_INT,
 397   GFC_ISYM_INT2,
 398   GFC_ISYM_INT8,
 399   GFC_ISYM_IOR,
 400   GFC_ISYM_IPARITY,
 401   GFC_ISYM_IRAND,
 402   GFC_ISYM_ISATTY,
 403   GFC_ISYM_IS_IOSTAT_END,
 404   GFC_ISYM_IS_IOSTAT_EOR,
 405   GFC_ISYM_ISNAN,
 406   GFC_ISYM_ISHFT,
 407   GFC_ISYM_ISHFTC,
 408   GFC_ISYM_ITIME,
 409   GFC_ISYM_J0,
 410   GFC_ISYM_J1,
 411   GFC_ISYM_JN,
 412   GFC_ISYM_JN2,
 413   GFC_ISYM_KILL,
 414   GFC_ISYM_KIND,
 415   GFC_ISYM_LBOUND,
 416   GFC_ISYM_LCOBOUND,
 417   GFC_ISYM_LEADZ,
 418   GFC_ISYM_LEN,
 419   GFC_ISYM_LEN_TRIM,
 420   GFC_ISYM_LGAMMA,
 421   GFC_ISYM_LGE,
 422   GFC_ISYM_LGT,
 423   GFC_ISYM_LINK,
 424   GFC_ISYM_LLE,
 425   GFC_ISYM_LLT,
 426   GFC_ISYM_LOC,
 427   GFC_ISYM_LOG,
 428   GFC_ISYM_LOG10,
 429   GFC_ISYM_LOGICAL,
 430   GFC_ISYM_LONG,
 431   GFC_ISYM_LSHIFT,
 432   GFC_ISYM_LSTAT,
 433   GFC_ISYM_LTIME,
 434   GFC_ISYM_MALLOC,
 435   GFC_ISYM_MASKL,
 436   GFC_ISYM_MASKR,
 437   GFC_ISYM_MATMUL,
 438   GFC_ISYM_MAX,
 439   GFC_ISYM_MAXEXPONENT,
 440   GFC_ISYM_MAXLOC,
 441   GFC_ISYM_MAXVAL,
 442   GFC_ISYM_MCLOCK,
 443   GFC_ISYM_MCLOCK8,
 444   GFC_ISYM_MERGE,
 445   GFC_ISYM_MERGE_BITS,
 446   GFC_ISYM_MIN,
 447   GFC_ISYM_MINEXPONENT,
 448   GFC_ISYM_MINLOC,
 449   GFC_ISYM_MINVAL,
 450   GFC_ISYM_MOD,
 451   GFC_ISYM_MODULO,
 452   GFC_ISYM_MOVE_ALLOC,
 453   GFC_ISYM_MVBITS,
 454   GFC_ISYM_NEAREST,
 455   GFC_ISYM_NEW_LINE,
 456   GFC_ISYM_NINT,
 457   GFC_ISYM_NORM2,
 458   GFC_ISYM_NOT,
 459   GFC_ISYM_NULL,
 460   GFC_ISYM_NUM_IMAGES,
 461   GFC_ISYM_OR,
 462   GFC_ISYM_PACK,
 463   GFC_ISYM_PARITY,
 464   GFC_ISYM_PERROR,
 465   GFC_ISYM_POPCNT,
 466   GFC_ISYM_POPPAR,
 467   GFC_ISYM_PRECISION,
 468   GFC_ISYM_PRESENT,
 469   GFC_ISYM_PRODUCT,
 470   GFC_ISYM_RADIX,
 471   GFC_ISYM_RAND,
 472   GFC_ISYM_RANDOM_NUMBER,
 473   GFC_ISYM_RANDOM_SEED,
 474   GFC_ISYM_RANGE,
 475   GFC_ISYM_RANK,
 476   GFC_ISYM_REAL,
 477   GFC_ISYM_RENAME,
 478   GFC_ISYM_REPEAT,
 479   GFC_ISYM_RESHAPE,
 480   GFC_ISYM_RRSPACING,
 481   GFC_ISYM_RSHIFT,
 482   GFC_ISYM_SAME_TYPE_AS,
 483   GFC_ISYM_SC_KIND,
 484   GFC_ISYM_SCALE,
 485   GFC_ISYM_SCAN,
 486   GFC_ISYM_SECNDS,
 487   GFC_ISYM_SECOND,
 488   GFC_ISYM_SET_EXPONENT,
 489   GFC_ISYM_SHAPE,
 490   GFC_ISYM_SHIFTA,
 491   GFC_ISYM_SHIFTL,
 492   GFC_ISYM_SHIFTR,
 493   GFC_ISYM_SIGN,
 494   GFC_ISYM_SIGNAL,
 495   GFC_ISYM_SI_KIND,
 496   GFC_ISYM_SIN,
 497   GFC_ISYM_SINH,
 498   GFC_ISYM_SIZE,
 499   GFC_ISYM_SLEEP,
 500   GFC_ISYM_SIZEOF,
 501   GFC_ISYM_SPACING,
 502   GFC_ISYM_SPREAD,
 503   GFC_ISYM_SQRT,
 504   GFC_ISYM_SRAND,
 505   GFC_ISYM_SR_KIND,
 506   GFC_ISYM_STAT,
 507   GFC_ISYM_STORAGE_SIZE,
 508   GFC_ISYM_SUM,
 509   GFC_ISYM_SYMLINK,
 510   GFC_ISYM_SYMLNK,
 511   GFC_ISYM_SYSTEM,
 512   GFC_ISYM_SYSTEM_CLOCK,
 513   GFC_ISYM_TAN,
 514   GFC_ISYM_TANH,
 515   GFC_ISYM_THIS_IMAGE,
 516   GFC_ISYM_TIME,
 517   GFC_ISYM_TIME8,
 518   GFC_ISYM_TINY,
 519   GFC_ISYM_TRAILZ,
 520   GFC_ISYM_TRANSFER,
 521   GFC_ISYM_TRANSPOSE,
 522   GFC_ISYM_TRIM,
 523   GFC_ISYM_TTYNAM,
 524   GFC_ISYM_UBOUND,
 525   GFC_ISYM_UCOBOUND,
 526   GFC_ISYM_UMASK,
 527   GFC_ISYM_UNLINK,
 528   GFC_ISYM_UNPACK,
 529   GFC_ISYM_VERIFY,
 530   GFC_ISYM_XOR,
 531   GFC_ISYM_Y0,
 532   GFC_ISYM_Y1,
 533   GFC_ISYM_YN,
 534   GFC_ISYM_YN2
 535 };
 536 typedef enum gfc_isym_id gfc_isym_id;
 537
 538
 539 typedef enum
 540 {
 541   GFC_INIT_REAL_OFF = 0,
 542   GFC_INIT_REAL_ZERO,
 543   GFC_INIT_REAL_NAN,
 544   GFC_INIT_REAL_SNAN,
 545   GFC_INIT_REAL_INF,
 546   GFC_INIT_REAL_NEG_INF
 547 }
 548 init_local_real;
 549
 550 typedef enum
 551 {
 552   GFC_INIT_LOGICAL_OFF = 0,
 553   GFC_INIT_LOGICAL_FALSE,
 554   GFC_INIT_LOGICAL_TRUE
 555 }
 556 init_local_logical;
 557
 558 typedef enum
 559 {
 560   GFC_INIT_CHARACTER_OFF = 0,
 561   GFC_INIT_CHARACTER_ON
 562 }
 563 init_local_character;
 564
 565 typedef enum
 566 {
 567   GFC_INIT_INTEGER_OFF = 0,
 568   GFC_INIT_INTEGER_ON
 569 }
 570 init_local_integer;
 571
 572 typedef enum
 573 {
 574   GFC_FCOARRAY_NONE = 0,
 575   GFC_FCOARRAY_SINGLE,
 576   GFC_FCOARRAY_LIB
 577 }
 578 gfc_fcoarray;
 579
 580 typedef enum
 581 {
 582   GFC_ENABLE_REVERSE,
 583   GFC_FORWARD_SET,
 584   GFC_REVERSE_SET,
 585   GFC_INHIBIT_REVERSE
 586 }
 587 gfc_reverse;
 588
 589 /************************* Structures *****************************/
 590
 591 /* Used for keeping things in balanced binary trees.  */
 592 #define BBT_HEADER(self) int priority; struct self *left, *right
 593
 594 #define NAMED_INTCST(a,b,c,d) a,
 595 #define NAMED_KINDARRAY(a,b,c,d) a,
 596 #define NAMED_FUNCTION(a,b,c,d) a,
 597 #define NAMED_DERIVED_TYPE(a,b,c,d) a,
 598 typedef enum
 599 {
 600   ISOFORTRANENV_INVALID = -1,
 601 #include "iso-fortran-env.def"
 602   ISOFORTRANENV_LAST, ISOFORTRANENV_NUMBER = ISOFORTRANENV_LAST
 603 }
 604 iso_fortran_env_symbol;
 605 #undef NAMED_INTCST
 606 #undef NAMED_KINDARRAY
 607 #undef NAMED_FUNCTION
 608 #undef NAMED_DERIVED_TYPE
 609
 610 #define NAMED_INTCST(a,b,c,d) a,
 611 #define NAMED_REALCST(a,b,c,d) a,
 612 #define NAMED_CMPXCST(a,b,c,d) a,
 613 #define NAMED_LOGCST(a,b,c) a,
 614 #define NAMED_CHARKNDCST(a,b,c) a,
 615 #define NAMED_CHARCST(a,b,c) a,
 616 #define DERIVED_TYPE(a,b,c) a,
 617 #define PROCEDURE(a,b) a,
 618 #define NAMED_FUNCTION(a,b,c,d) a,
 619 typedef enum
 620 {
 621   ISOCBINDING_INVALID = -1,
 622 #include "iso-c-binding.def"
 623   ISOCBINDING_LAST,
 624   ISOCBINDING_NUMBER = ISOCBINDING_LAST
 625 }
 626 iso_c_binding_symbol;
 627 #undef NAMED_INTCST
 628 #undef NAMED_REALCST
 629 #undef NAMED_CMPXCST
 630 #undef NAMED_LOGCST
 631 #undef NAMED_CHARKNDCST
 632 #undef NAMED_CHARCST
 633 #undef DERIVED_TYPE
 634 #undef PROCEDURE
 635 #undef NAMED_FUNCTION
 636
 637 typedef enum
 638 {
 639   INTMOD_NONE = 0, INTMOD_ISO_FORTRAN_ENV, INTMOD_ISO_C_BINDING
 640 }
 641 intmod_id;
 642
 643 typedef struct
 644 {
 645   char name[GFC_MAX_SYMBOL_LEN + 1];
 646   int value;  /* Used for both integer and character values.  */
 647   bt f90_type;
 648 }
 649 CInteropKind_t;
 650
 651 /* Array of structs, where the structs represent the C interop kinds.
 652    The list will be implemented based on a hash of the kind name since
 653    these could be accessed multiple times.
 654    Declared in trans-types.c as a global, since it's in that file
 655    that the list is initialized.  */
 656 extern CInteropKind_t c_interop_kinds_table[];
 657
 658
 659 /* Structure and list of supported extension attributes.  */
 660 typedef enum
 661 {
 662   EXT_ATTR_DLLIMPORT = 0,
 663   EXT_ATTR_DLLEXPORT,
 664   EXT_ATTR_STDCALL,
 665   EXT_ATTR_CDECL,
 666   EXT_ATTR_FASTCALL,
 667   EXT_ATTR_LAST, EXT_ATTR_NUM = EXT_ATTR_LAST
 668 }
 669 ext_attr_id_t;
 670
 671 typedef struct
 672 {
 673   const char *name;
 674   unsigned id;
 675   const char *middle_end_name;
 676 }
 677 ext_attr_t;
 678
 679 extern const ext_attr_t ext_attr_list[];
 680
 681 /* Symbol attribute structure.  */
 682 typedef struct
 683 {
 684   /* Variable attributes.  */
 685   unsigned allocatable:1, dimension:1, codimension:1, external:1, intrinsic:1,
 686     optional:1, pointer:1, target:1, value:1, volatile_:1, temporary:1,
 687     dummy:1, result:1, assign:1, threadprivate:1, not_always_present:1,
 688     implied_index:1, subref_array_pointer:1, proc_pointer:1, asynchronous:1,
 689     contiguous:1;
 690
 691   /* For CLASS containers, the pointer attribute is sometimes set internally
 692      even though it was not directly specified.  In this case, keep the
 693      "real" (original) value here.  */
 694   unsigned class_pointer:1;
 695
 696   ENUM_BITFIELD (save_state) save:2;
 697
 698   unsigned data:1,              /* Symbol is named in a DATA statement.  */
 699     is_protected:1,             /* Symbol has been marked as protected.  */
 700     use_assoc:1,                /* Symbol has been use-associated.  */
 701     use_only:1,                 /* Symbol has been use-associated, with ONLY.  */
 702     use_rename:1,               /* Symbol has been use-associated and renamed.  */
 703     imported:1,                 /* Symbol has been associated by IMPORT.  */
 704     host_assoc:1;               /* Symbol has been host associated.  */
 705
 706   unsigned in_namelist:1, in_common:1, in_equivalence:1;
 707   unsigned function:1, subroutine:1, procedure:1;
 708   unsigned generic:1, generic_copy:1;
 709   unsigned implicit_type:1;     /* Type defined via implicit rules.  */
 710   unsigned untyped:1;           /* No implicit type could be found.  */
 711
 712   unsigned is_bind_c:1;         /* say if is bound to C.  */
 713   unsigned extension:8;         /* extension level of a derived type.  */
 714   unsigned is_class:1;          /* is a CLASS container.  */
 715   unsigned class_ok:1;          /* is a CLASS object with correct attributes.  */
 716   unsigned vtab:1;              /* is a derived type vtab, pointed to by CLASS objects.  */
 717   unsigned vtype:1;             /* is a derived type of a vtab.  */
 718
 719   /* These flags are both in the typespec and attribute.  The attribute
 720      list is what gets read from/written to a module file.  The typespec
 721      is created from a decl being processed.  */
 722   unsigned is_c_interop:1;      /* It's c interoperable.  */
 723   unsigned is_iso_c:1;          /* Symbol is from iso_c_binding.  */
 724
 725   /* Function/subroutine attributes */
 726   unsigned sequence:1, elemental:1, pure:1, recursive:1;
 727   unsigned unmaskable:1, masked:1, contained:1, mod_proc:1, abstract:1;
 728
 729   /* Set if a (public) symbol [e.g. generic name] exposes this symbol,
 730      which is relevant for private module procedures.  */
 731   unsigned public_used:1;
 732
 733   /* This is set if a contained procedure could be declared pure.  This is
 734      used for certain optimizations that require the result or arguments
 735      cannot alias.  Note that this is zero for PURE procedures.  */
 736   unsigned implicit_pure:1;
 737
 738   /* This is set if the subroutine doesn't return.  Currently, this
 739      is only possible for intrinsic subroutines.  */
 740   unsigned noreturn:1;
 741
 742   /* Set if this procedure is an alternate entry point.  These procedures
 743      don't have any code associated, and the backend will turn them into
 744      thunks to the master function.  */
 745   unsigned entry:1;
 746
 747   /* Set if this is the master function for a procedure with multiple
 748      entry points.  */
 749   unsigned entry_master:1;
 750
 751   /* Set if this is the master function for a function with multiple
 752      entry points where characteristics of the entry points differ.  */
 753   unsigned mixed_entry_master:1;
 754
 755   /* Set if a function must always be referenced by an explicit interface.  */
 756   unsigned always_explicit:1;
 757
 758   /* Set if the symbol has been referenced in an expression.  No further
 759      modification of type or type parameters is permitted.  */
 760   unsigned referenced:1;
 761
 762   /* Set if this is the symbol for the main program.  */
 763   unsigned is_main_program:1;
 764
 765   /* Mutually exclusive multibit attributes.  */
 766   ENUM_BITFIELD (gfc_access) access:2;
 767   ENUM_BITFIELD (sym_intent) intent:2;
 768   ENUM_BITFIELD (sym_flavor) flavor:4;
 769   ENUM_BITFIELD (ifsrc) if_source:2;
 770
 771   ENUM_BITFIELD (procedure_type) proc:3;
 772
 773   /* Special attributes for Cray pointers, pointees.  */
 774   unsigned cray_pointer:1, cray_pointee:1;
 775
 776   /* The symbol is a derived type with allocatable components, pointer
 777      components or private components, procedure pointer components,
 778      possibly nested.  zero_comp is true if the derived type has no
 779      component at all.  */
 780   unsigned alloc_comp:1, pointer_comp:1, proc_pointer_comp:1,
 781            private_comp:1, zero_comp:1, coarray_comp:1, lock_comp:1;
 782
 783   /* This is a temporary selector for SELECT TYPE.  */
 784   unsigned select_type_temporary:1;
 785
 786   /* Attributes set by compiler extensions (!GCC$ ATTRIBUTES).  */
 787   unsigned ext_attr:EXT_ATTR_NUM;
 788
 789   /* The namespace where the attribute has been set.  */
 790   struct gfc_namespace *volatile_ns, *asynchronous_ns;
 791 }
 792 symbol_attribute;
 793
 794
 795 /* We need to store source lines as sequences of multibyte source
 796    characters. We define here a type wide enough to hold any multibyte
 797    source character, just like libcpp does.  A 32-bit type is enough.  */
 798
 799 #if HOST_BITS_PER_INT >= 32
 800 typedef unsigned int gfc_char_t;
 801 #elif HOST_BITS_PER_LONG >= 32
 802 typedef unsigned long gfc_char_t;
 803 #elif defined(HAVE_LONG_LONG) && (HOST_BITS_PER_LONGLONG >= 32)
 804 typedef unsigned long long gfc_char_t;
 805 #else
 806 # error "Cannot find an integer type with at least 32 bits"
 807 #endif
 808
 809
 810 /* The following three structures are used to identify a location in
 811    the sources.
 812
 813    gfc_file is used to maintain a tree of the source files and how
 814    they include each other
 815
 816    gfc_linebuf holds a single line of source code and information
 817    which file it resides in
 818
 819    locus point to the sourceline and the character in the source
 820    line.
 821 */
 822
 823 typedef struct gfc_file
 824 {
 825   struct gfc_file *next, *up;
 826   int inclusion_line, line;
 827   char *filename;
 828 } gfc_file;
 829
 830 typedef struct gfc_linebuf
 831 {
 832   source_location location;
 833   struct gfc_file *file;
 834   struct gfc_linebuf *next;
 835
 836   int truncated;
 837   bool dbg_emitted;
 838
 839   gfc_char_t line[1];
 840 } gfc_linebuf;
 841
 842 #define gfc_linebuf_header_size (offsetof (gfc_linebuf, line))
 843
 844 #define gfc_linebuf_linenum(LBUF) (LOCATION_LINE ((LBUF)->location))
 845
 846 typedef struct
 847 {
 848   gfc_char_t *nextc;
 849   gfc_linebuf *lb;
 850 } locus;
 851
 852 /* In order for the "gfc" format checking to work correctly, you must
 853    have declared a typedef locus first.  */
 854 #if GCC_VERSION >= 4001
 855 #define ATTRIBUTE_GCC_GFC(m, n) __attribute__ ((__format__ (__gcc_gfc__, m, n))) ATTRIBUTE_NONNULL(m)
 856 #else
 857 #define ATTRIBUTE_GCC_GFC(m, n) ATTRIBUTE_NONNULL(m)
 858 #endif
 859
 860
 861 /* Suppress error messages or re-enable them.  */
 862
 863 void gfc_push_suppress_errors (void);
 864 void gfc_pop_suppress_errors (void);
 865
 866
 867 /* Character length structures hold the expression that gives the
 868    length of a character variable.  We avoid putting these into
 869    gfc_typespec because doing so prevents us from doing structure
 870    copies and forces us to deallocate any typespecs we create, as well
 871    as structures that contain typespecs.  They also can have multiple
 872    character typespecs pointing to them.
 873
 874    These structures form a singly linked list within the current
 875    namespace and are deallocated with the namespace.  It is possible to
 876    end up with gfc_charlen structures that have nothing pointing to them.  */
 877
 878 typedef struct gfc_charlen
 879 {
 880   struct gfc_expr *length;
 881   struct gfc_charlen *next;
 882   bool length_from_typespec; /* Length from explicit array ctor typespec?  */
 883   tree backend_decl;
 884   tree passed_length; /* Length argument explicitly passed.  */
 885
 886   int resolved;
 887 }
 888 gfc_charlen;
 889
 890 #define gfc_get_charlen() XCNEW (gfc_charlen)
 891
 892 /* Type specification structure.  */
 893 typedef struct
 894 {
 895   bt type;
 896   int kind;
 897
 898   union
 899   {
 900     struct gfc_symbol *derived; /* For derived types only.  */
 901     gfc_charlen *cl;            /* For character types only.  */
 902     int pad;                    /* For hollerith types only.  */
 903   }
 904   u;
 905
 906   struct gfc_symbol *interface; /* For PROCEDURE declarations.  */
 907   int is_c_interop;
 908   int is_iso_c;
 909   bt f90_type;
 910   bool deferred;
 911 }
 912 gfc_typespec;
 913
 914 /* Array specification.  */
 915 typedef struct
 916 {
 917   int rank;     /* A rank of zero means that a variable is a scalar.  */
 918   int corank;
 919   array_type type, cotype;
 920   struct gfc_expr *lower[GFC_MAX_DIMENSIONS], *upper[GFC_MAX_DIMENSIONS];
 921
 922   /* These two fields are used with the Cray Pointer extension.  */
 923   bool cray_pointee; /* True iff this spec belongs to a cray pointee.  */
 924   bool cp_was_assumed; /* AS_ASSUMED_SIZE cp arrays are converted to
 925                         AS_EXPLICIT, but we want to remember that we
 926                         did this.  */
 927
 928 }
 929 gfc_array_spec;
 930
 931 #define gfc_get_array_spec() XCNEW (gfc_array_spec)
 932
 933
 934 /* Components of derived types.  */
 935 typedef struct gfc_component
 936 {
 937   const char *name;
 938   gfc_typespec ts;
 939
 940   symbol_attribute attr;
 941   gfc_array_spec *as;
 942
 943   tree backend_decl;
 944   /* Used to cache a FIELD_DECL matching this same component
 945      but applied to a different backend containing type that was
 946      generated by gfc_nonrestricted_type.  */
 947   tree norestrict_decl;
 948   locus loc;
 949   struct gfc_expr *initializer;
 950   struct gfc_component *next;
 951
 952   /* Needed for procedure pointer components.  */
 953   struct gfc_formal_arglist *formal;
 954   struct gfc_namespace *formal_ns;
 955   struct gfc_typebound_proc *tb;
 956 }
 957 gfc_component;
 958
 959 #define gfc_get_component() XCNEW (gfc_component)
 960
 961 /* Formal argument lists are lists of symbols.  */
 962 typedef struct gfc_formal_arglist
 963 {
 964   /* Symbol representing the argument at this position in the arglist.  */
 965   struct gfc_symbol *sym;
 966   /* Points to the next formal argument.  */
 967   struct gfc_formal_arglist *next;
 968 }
 969 gfc_formal_arglist;
 970
 971 #define gfc_get_formal_arglist() XCNEW (gfc_formal_arglist)
 972
 973
 974 /* The gfc_actual_arglist structure is for actual arguments.  */
 975 typedef struct gfc_actual_arglist
 976 {
 977   const char *name;
 978   /* Alternate return label when the expr member is null.  */
 979   struct gfc_st_label *label;
 980
 981   /* This is set to the type of an eventual omitted optional
 982      argument. This is used to determine if a hidden string length
 983      argument has to be added to a function call.  */
 984   bt missing_arg_type;
 985
 986   struct gfc_expr *expr;
 987   struct gfc_actual_arglist *next;
 988 }
 989 gfc_actual_arglist;
 990
 991 #define gfc_get_actual_arglist() XCNEW (gfc_actual_arglist)
 992
 993
 994 /* Because a symbol can belong to multiple namelists, they must be
 995    linked externally to the symbol itself.  */
 996 typedef struct gfc_namelist
 997 {
 998   struct gfc_symbol *sym;
 999   struct gfc_namelist *next;
1000 }
1001 gfc_namelist;
1002
1003 #define gfc_get_namelist() XCNEW (gfc_namelist)
1004
1005 enum
1006 {
1007   OMP_LIST_PRIVATE,
1008   OMP_LIST_FIRSTPRIVATE,
1009   OMP_LIST_LASTPRIVATE,
1010   OMP_LIST_COPYPRIVATE,
1011   OMP_LIST_SHARED,
1012   OMP_LIST_COPYIN,
1013   OMP_LIST_PLUS,
1014   OMP_LIST_REDUCTION_FIRST = OMP_LIST_PLUS,
1015   OMP_LIST_MULT,
1016   OMP_LIST_SUB,
1017   OMP_LIST_AND,
1018   OMP_LIST_OR,
1019   OMP_LIST_EQV,
1020   OMP_LIST_NEQV,
1021   OMP_LIST_MAX,
1022   OMP_LIST_MIN,
1023   OMP_LIST_IAND,
1024   OMP_LIST_IOR,
1025   OMP_LIST_IEOR,
1026   OMP_LIST_REDUCTION_LAST = OMP_LIST_IEOR,
1027   OMP_LIST_NUM
1028 };
1029
1030 /* Because a symbol can belong to multiple namelists, they must be
1031    linked externally to the symbol itself.  */
1032
1033 enum gfc_omp_sched_kind
1034 {
1035   OMP_SCHED_NONE,
1036   OMP_SCHED_STATIC,
1037   OMP_SCHED_DYNAMIC,
1038   OMP_SCHED_GUIDED,
1039   OMP_SCHED_RUNTIME,
1040   OMP_SCHED_AUTO
1041 };
1042
1043 enum gfc_omp_default_sharing
1044 {
1045   OMP_DEFAULT_UNKNOWN,
1046   OMP_DEFAULT_NONE,
1047   OMP_DEFAULT_PRIVATE,
1048   OMP_DEFAULT_SHARED,
1049   OMP_DEFAULT_FIRSTPRIVATE
1050 };
1051
1052 typedef struct gfc_omp_clauses
1053 {
1054   struct gfc_expr *if_expr;
1055   struct gfc_expr *final_expr;
1056   struct gfc_expr *num_threads;
1057   gfc_namelist *lists[OMP_LIST_NUM];
1058   enum gfc_omp_sched_kind sched_kind;
1059   struct gfc_expr *chunk_size;
1060   enum gfc_omp_default_sharing default_sharing;
1061   int collapse;
1062   bool nowait, ordered, untied, mergeable;
1063 }
1064 gfc_omp_clauses;
1065
1066 #define gfc_get_omp_clauses() XCNEW (gfc_omp_clauses)
1067
1068
1069 /* The gfc_st_label structure is a BBT attached to a namespace that
1070    records the usage of statement labels within that space.  */
1071
1072 typedef struct gfc_st_label
1073 {
1074   BBT_HEADER(gfc_st_label);
1075
1076   int value;
1077
1078   gfc_sl_type defined, referenced;
1079
1080   struct gfc_expr *format;
1081
1082   tree backend_decl;
1083
1084   locus where;
1085 }
1086 gfc_st_label;
1087
1088
1089 /* gfc_interface()-- Interfaces are lists of symbols strung together.  */
1090 typedef struct gfc_interface
1091 {
1092   struct gfc_symbol *sym;
1093   locus where;
1094   struct gfc_interface *next;
1095 }
1096 gfc_interface;
1097
1098 #define gfc_get_interface() XCNEW (gfc_interface)
1099
1100 /* User operator nodes.  These are like stripped down symbols.  */
1101 typedef struct
1102 {
1103   const char *name;
1104
1105   gfc_interface *op;
1106   struct gfc_namespace *ns;
1107   gfc_access access;
1108 }
1109 gfc_user_op;
1110
1111
1112 /* A list of specific bindings that are associated with a generic spec.  */
1113 typedef struct gfc_tbp_generic
1114 {
1115   /* The parser sets specific_st, upon resolution we look for the corresponding
1116      gfc_typebound_proc and set specific for further use.  */
1117   struct gfc_symtree* specific_st;
1118   struct gfc_typebound_proc* specific;
1119
1120   struct gfc_tbp_generic* next;
1121   bool is_operator;
1122 }
1123 gfc_tbp_generic;
1124
1125 #define gfc_get_tbp_generic() XCNEW (gfc_tbp_generic)
1126
1127
1128 /* Data needed for type-bound procedures.  */
1129 typedef struct gfc_typebound_proc
1130 {
1131   locus where; /* Where the PROCEDURE/GENERIC definition was.  */
1132
1133   union
1134   {
1135     struct gfc_symtree* specific; /* The interface if DEFERRED.  */
1136     gfc_tbp_generic* generic;
1137   }
1138   u;
1139
1140   gfc_access access;
1141   const char* pass_arg; /* Argument-name for PASS.  NULL if not specified.  */
1142
1143   /* The overridden type-bound proc (or GENERIC with this name in the
1144      parent-type) or NULL if non.  */
1145   struct gfc_typebound_proc* overridden;
1146
1147   /* Once resolved, we use the position of pass_arg in the formal arglist of
1148      the binding-target procedure to identify it.  The first argument has
1149      number 1 here, the second 2, and so on.  */
1150   unsigned pass_arg_num;
1151
1152   unsigned nopass:1; /* Whether we have NOPASS (PASS otherwise).  */
1153   unsigned non_overridable:1;
1154   unsigned deferred:1;
1155   unsigned is_generic:1;
1156   unsigned function:1, subroutine:1;
1157   unsigned error:1; /* Ignore it, when an error occurred during resolution.  */
1158   unsigned ppc:1;
1159 }
1160 gfc_typebound_proc;
1161
1162
1163 /* Symbol nodes.  These are important things.  They are what the
1164    standard refers to as "entities".  The possibly multiple names that
1165    refer to the same entity are accomplished by a binary tree of
1166    symtree structures that is balanced by the red-black method-- more
1167    than one symtree node can point to any given symbol.  */
1168
1169 typedef struct gfc_symbol
1170 {
1171   const char *name;     /* Primary name, before renaming */
1172   const char *module;   /* Module this symbol came from */
1173   locus declared_at;
1174
1175   gfc_typespec ts;
1176   symbol_attribute attr;
1177
1178   /* The formal member points to the formal argument list if the
1179      symbol is a function or subroutine name.  If the symbol is a
1180      generic name, the generic member points to the list of
1181      interfaces.  */
1182
1183   gfc_interface *generic;
1184   gfc_access component_access;
1185
1186   gfc_formal_arglist *formal;
1187   struct gfc_namespace *formal_ns;
1188   struct gfc_namespace *f2k_derived;
1189
1190   struct gfc_expr *value;       /* Parameter/Initializer value */
1191   gfc_array_spec *as;
1192   struct gfc_symbol *result;    /* function result symbol */
1193   gfc_component *components;    /* Derived type components */
1194
1195   /* Defined only for Cray pointees; points to their pointer.  */
1196   struct gfc_symbol *cp_pointer;
1197
1198   int entry_id;                 /* Used in resolve.c for entries.  */
1199
1200   /* CLASS hashed name for declared and dynamic types in the class.  */
1201   int hash_value;
1202
1203   struct gfc_symbol *common_next;       /* Links for COMMON syms */
1204
1205   /* This is in fact a gfc_common_head but it is only used for pointer
1206      comparisons to check if symbols are in the same common block.  */
1207   struct gfc_common_head* common_head;
1208
1209   /* Make sure setup code for dummy arguments is generated in the correct
1210      order.  */
1211   int dummy_order;
1212
1213   gfc_namelist *namelist, *namelist_tail;
1214
1215   /* Change management fields.  Symbols that might be modified by the
1216      current statement have the mark member nonzero and are kept in a
1217      singly linked list through the tlink field.  Of these symbols,
1218      symbols with old_symbol equal to NULL are symbols created within
1219      the current statement.  Otherwise, old_symbol points to a copy of
1220      the old symbol.  */
1221
1222   struct gfc_symbol *old_symbol, *tlink;
1223   unsigned mark:1, gfc_new:1;
1224   /* Nonzero if all equivalences associated with this symbol have been
1225      processed.  */
1226   unsigned equiv_built:1;
1227   /* Set if this variable is used as an index name in a FORALL.  */
1228   unsigned forall_index:1;
1229   int refs;
1230   struct gfc_namespace *ns;     /* namespace containing this symbol */
1231
1232   tree backend_decl;
1233
1234   /* Identity of the intrinsic module the symbol comes from, or
1235      INTMOD_NONE if it's not imported from a intrinsic module.  */
1236   intmod_id from_intmod;
1237   /* Identity of the symbol from intrinsic modules, from enums maintained
1238      separately by each intrinsic module.  Used together with from_intmod,
1239      it uniquely identifies a symbol from an intrinsic module.  */
1240   int intmod_sym_id;
1241
1242   /* This may be repetitive, since the typespec now has a binding
1243      label field.  */
1244   const char* binding_label;
1245   /* Store a reference to the common_block, if this symbol is in one.  */
1246   struct gfc_common_head *common_block;
1247
1248   /* Link to corresponding association-list if this is an associate name.  */
1249   struct gfc_association_list *assoc;
1250 }
1251 gfc_symbol;
1252
1253
1254 /* This structure is used to keep track of symbols in common blocks.  */
1255 typedef struct gfc_common_head
1256 {
1257   locus where;
1258   char use_assoc, saved, threadprivate;
1259   char name[GFC_MAX_SYMBOL_LEN + 1];
1260   struct gfc_symbol *head;
1261   const char* binding_label;
1262   int is_bind_c;
1263 }
1264 gfc_common_head;
1265
1266 #define gfc_get_common_head() XCNEW (gfc_common_head)
1267
1268
1269 /* A list of all the alternate entry points for a procedure.  */
1270
1271 typedef struct gfc_entry_list
1272 {
1273   /* The symbol for this entry point.  */
1274   gfc_symbol *sym;
1275   /* The zero-based id of this entry point.  */
1276   int id;
1277   /* The LABEL_EXPR marking this entry point.  */
1278   tree label;
1279   /* The next item in the list.  */
1280   struct gfc_entry_list *next;
1281 }
1282 gfc_entry_list;
1283
1284 #define gfc_get_entry_list() XCNEW (gfc_entry_list)
1285
1286 /* Lists of rename info for the USE statement.  */
1287
1288 typedef struct gfc_use_rename
1289 {
1290   char local_name[GFC_MAX_SYMBOL_LEN + 1], use_name[GFC_MAX_SYMBOL_LEN + 1];
1291   struct gfc_use_rename *next;
1292   int found;
1293   gfc_intrinsic_op op;
1294   locus where;
1295 }
1296 gfc_use_rename;
1297
1298 #define gfc_get_use_rename() XCNEW (gfc_use_rename);
1299
1300 /* A list of all USE statements in a namespace.  */
1301
1302 typedef struct gfc_use_list
1303 {
1304   const char *module_name;
1305   bool intrinsic;
1306   bool non_intrinsic;
1307   bool only_flag;
1308   struct gfc_use_rename *rename;
1309   locus where;
1310   /* Next USE statement.  */
1311   struct gfc_use_list *next;
1312 }
1313 gfc_use_list;
1314
1315 #define gfc_get_use_list() XCNEW (gfc_use_list)
1316
1317 /* Within a namespace, symbols are pointed to by symtree nodes that
1318    are linked together in a balanced binary tree.  There can be
1319    several symtrees pointing to the same symbol node via USE
1320    statements.  */
1321
1322 typedef struct gfc_symtree
1323 {
1324   BBT_HEADER (gfc_symtree);
1325   const char *name;
1326   int ambiguous;
1327   union
1328   {
1329     gfc_symbol *sym;            /* Symbol associated with this node */
1330     gfc_user_op *uop;
1331     gfc_common_head *common;
1332     gfc_typebound_proc *tb;
1333   }
1334   n;
1335 }
1336 gfc_symtree;
1337
1338 /* A linked list of derived types in the namespace.  */
1339 typedef struct gfc_dt_list
1340 {
1341   struct gfc_symbol *derived;
1342   struct gfc_dt_list *next;
1343 }
1344 gfc_dt_list;
1345
1346 #define gfc_get_dt_list() XCNEW (gfc_dt_list)
1347
1348   /* A list of all derived types.  */
1349   extern gfc_dt_list *gfc_derived_types;
1350
1351 /* A namespace describes the contents of procedure, module, interface block
1352    or BLOCK construct.  */
1353 /* ??? Anything else use these?  */
1354
1355 typedef struct gfc_namespace
1356 {
1357   /* Tree containing all the symbols in this namespace.  */
1358   gfc_symtree *sym_root;
1359   /* Tree containing all the user-defined operators in the namespace.  */
1360   gfc_symtree *uop_root;
1361   /* Tree containing all the common blocks.  */
1362   gfc_symtree *common_root;
1363
1364   /* Tree containing type-bound procedures.  */
1365   gfc_symtree *tb_sym_root;
1366   /* Type-bound user operators.  */
1367   gfc_symtree *tb_uop_root;
1368   /* For derived-types, store type-bound intrinsic operators here.  */
1369   gfc_typebound_proc *tb_op[GFC_INTRINSIC_OPS];
1370   /* Linked list of finalizer procedures.  */
1371   struct gfc_finalizer *finalizers;
1372
1373   /* If set_flag[letter] is set, an implicit type has been set for letter.  */
1374   int set_flag[GFC_LETTERS];
1375   /* Keeps track of the implicit types associated with the letters.  */
1376   gfc_typespec default_type[GFC_LETTERS];
1377   /* Store the positions of IMPLICIT statements.  */
1378   locus implicit_loc[GFC_LETTERS];
1379
1380   /* If this is a namespace of a procedure, this points to the procedure.  */
1381   struct gfc_symbol *proc_name;
1382   /* If this is the namespace of a unit which contains executable
1383      code, this points to it.  */
1384   struct gfc_code *code;
1385
1386   /* Points to the equivalences set up in this namespace.  */
1387   struct gfc_equiv *equiv, *old_equiv;
1388
1389   /* Points to the equivalence groups produced by trans_common.  */
1390   struct gfc_equiv_list *equiv_lists;
1391
1392   gfc_interface *op[GFC_INTRINSIC_OPS];
1393
1394   /* Points to the parent namespace, i.e. the namespace of a module or
1395      procedure in which the procedure belonging to this namespace is
1396      contained. The parent namespace points to this namespace either
1397      directly via CONTAINED, or indirectly via the chain built by
1398      SIBLING.  */
1399   struct gfc_namespace *parent;
1400   /* CONTAINED points to the first contained namespace. Sibling
1401      namespaces are chained via SIBLING.  */
1402   struct gfc_namespace  *contained, *sibling;
1403
1404   gfc_common_head blank_common;
1405   gfc_access default_access, operator_access[GFC_INTRINSIC_OPS];
1406
1407   gfc_st_label *st_labels;
1408   /* This list holds information about all the data initializers in
1409      this namespace.  */
1410   struct gfc_data *data;
1411
1412   gfc_charlen *cl_list, *old_cl_list;
1413
1414   gfc_dt_list *derived_types;
1415
1416   int save_all, seen_save, seen_implicit_none;
1417
1418   /* Normally we don't need to refcount namespaces.  However when we read
1419      a module containing a function with multiple entry points, this
1420      will appear as several functions with the same formal namespace.  */
1421   int refs;
1422
1423   /* A list of all alternate entry points to this procedure (or NULL).  */
1424   gfc_entry_list *entries;
1425
1426   /* A list of USE statements in this namespace.  */
1427   gfc_use_list *use_stmts;
1428
1429   /* Set to 1 if namespace is a BLOCK DATA program unit.  */
1430   unsigned is_block_data:1;
1431
1432   /* Set to 1 if namespace is an interface body with "IMPORT" used.  */
1433   unsigned has_import_set:1;
1434
1435   /* Set to 1 if resolved has been called for this namespace.
1436      Holds -1 during resolution.  */
1437   signed resolved:2;
1438
1439   /* Set to 1 if code has been generated for this namespace.  */
1440   unsigned translated:1;
1441
1442   /* Set to 1 if symbols in this namespace should be 'construct entities',
1443      i.e. for BLOCK local variables.  */
1444   unsigned construct_entities:1;
1445 }
1446 gfc_namespace;
1447
1448 extern gfc_namespace *gfc_current_ns;
1449 extern gfc_namespace *gfc_global_ns_list;
1450
1451 /* Global symbols are symbols of global scope. Currently we only use
1452    this to detect collisions already when parsing.
1453    TODO: Extend to verify procedure calls.  */
1454
1455 enum gfc_symbol_type
1456 {
1457   GSYM_UNKNOWN=1, GSYM_PROGRAM, GSYM_FUNCTION, GSYM_SUBROUTINE,
1458   GSYM_MODULE, GSYM_COMMON, GSYM_BLOCK_DATA
1459 };
1460
1461 typedef struct gfc_gsymbol
1462 {
1463   BBT_HEADER(gfc_gsymbol);
1464
1465   const char *name;
1466   const char *sym_name;
1467   const char *mod_name;
1468   const char *binding_label;
1469   enum gfc_symbol_type type;
1470
1471   int defined, used;
1472   locus where;
1473   gfc_namespace *ns;
1474 }
1475 gfc_gsymbol;
1476
1477 extern gfc_gsymbol *gfc_gsym_root;
1478
1479 /* Information on interfaces being built.  */
1480 typedef struct
1481 {
1482   interface_type type;
1483   gfc_symbol *sym;
1484   gfc_namespace *ns;
1485   gfc_user_op *uop;
1486   gfc_intrinsic_op op;
1487 }
1488 gfc_interface_info;
1489
1490 extern gfc_interface_info current_interface;
1491
1492
1493 /* Array reference.  */
1494
1495 enum gfc_array_ref_dimen_type
1496 {
1497   DIMEN_ELEMENT = 1, DIMEN_RANGE, DIMEN_VECTOR, DIMEN_STAR, DIMEN_THIS_IMAGE, DIMEN_UNKNOWN
1498 };
1499
1500 typedef struct gfc_array_ref
1501 {
1502   ar_type type;
1503   int dimen;                    /* # of components in the reference */
1504   int codimen;
1505   bool in_allocate;             /* For coarray checks. */
1506   locus where;
1507   gfc_array_spec *as;
1508
1509   locus c_where[GFC_MAX_DIMENSIONS];    /* All expressions can be NULL */
1510   struct gfc_expr *start[GFC_MAX_DIMENSIONS], *end[GFC_MAX_DIMENSIONS],
1511     *stride[GFC_MAX_DIMENSIONS];
1512
1513   enum gfc_array_ref_dimen_type dimen_type[GFC_MAX_DIMENSIONS];
1514
1515   struct gfc_expr *offset;
1516 }
1517 gfc_array_ref;
1518
1519 #define gfc_get_array_ref() XCNEW (gfc_array_ref)
1520
1521
1522 /* Component reference nodes.  A variable is stored as an expression
1523    node that points to the base symbol.  After that, a singly linked
1524    list of component reference nodes gives the variable's complete
1525    resolution.  The array_ref component may be present and comes
1526    before the component component.  */
1527
1528 typedef enum
1529   { REF_ARRAY, REF_COMPONENT, REF_SUBSTRING }
1530 ref_type;
1531
1532 typedef struct gfc_ref
1533 {
1534   ref_type type;
1535
1536   union
1537   {
1538     struct gfc_array_ref ar;
1539
1540     struct
1541     {
1542       gfc_component *component;
1543       gfc_symbol *sym;
1544     }
1545     c;
1546
1547     struct
1548     {
1549       struct gfc_expr *start, *end;     /* Substring */
1550       gfc_charlen *length;
1551     }
1552     ss;
1553
1554   }
1555   u;
1556
1557   struct gfc_ref *next;
1558 }
1559 gfc_ref;
1560
1561 #define gfc_get_ref() XCNEW (gfc_ref)
1562
1563
1564 /* Structures representing intrinsic symbols and their arguments lists.  */
1565 typedef struct gfc_intrinsic_arg
1566 {
1567   char name[GFC_MAX_SYMBOL_LEN + 1];
1568
1569   gfc_typespec ts;
1570   unsigned optional:1, value:1;
1571   ENUM_BITFIELD (sym_intent) intent:2;
1572   gfc_actual_arglist *actual;
1573
1574   struct gfc_intrinsic_arg *next;
1575
1576 }
1577 gfc_intrinsic_arg;
1578
1579
1580 /* Specifies the various kinds of check functions used to verify the
1581    argument lists of intrinsic functions. fX with X an integer refer
1582    to check functions of intrinsics with X arguments. f1m is used for
1583    the MAX and MIN intrinsics which can have an arbitrary number of
1584    arguments, f3ml is used for the MINLOC and MAXLOC intrinsics as
1585    these have special semantics.  */
1586
1587 typedef union
1588 {
1589   gfc_try (*f0)(void);
1590   gfc_try (*f1)(struct gfc_expr *);
1591   gfc_try (*f1m)(gfc_actual_arglist *);
1592   gfc_try (*f2)(struct gfc_expr *, struct gfc_expr *);
1593   gfc_try (*f3)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1594   gfc_try (*f3ml)(gfc_actual_arglist *);
1595   gfc_try (*f3red)(gfc_actual_arglist *);
1596   gfc_try (*f4)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1597             struct gfc_expr *);
1598   gfc_try (*f5)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1599             struct gfc_expr *, struct gfc_expr *);
1600 }
1601 gfc_check_f;
1602
1603 /* Like gfc_check_f, these specify the type of the simplification
1604    function associated with an intrinsic. The fX are just like in
1605    gfc_check_f. cc is used for type conversion functions.  */
1606
1607 typedef union
1608 {
1609   struct gfc_expr *(*f0)(void);
1610   struct gfc_expr *(*f1)(struct gfc_expr *);
1611   struct gfc_expr *(*f2)(struct gfc_expr *, struct gfc_expr *);
1612   struct gfc_expr *(*f3)(struct gfc_expr *, struct gfc_expr *,
1613                          struct gfc_expr *);
1614   struct gfc_expr *(*f4)(struct gfc_expr *, struct gfc_expr *,
1615                          struct gfc_expr *, struct gfc_expr *);
1616   struct gfc_expr *(*f5)(struct gfc_expr *, struct gfc_expr *,
1617                          struct gfc_expr *, struct gfc_expr *,
1618                          struct gfc_expr *);
1619   struct gfc_expr *(*cc)(struct gfc_expr *, bt, int);
1620 }
1621 gfc_simplify_f;
1622
1623 /* Again like gfc_check_f, these specify the type of the resolution
1624    function associated with an intrinsic. The fX are just like in
1625    gfc_check_f. f1m is used for MIN and MAX, s1 is used for abort().  */
1626
1627 typedef union
1628 {
1629   void (*f0)(struct gfc_expr *);
1630   void (*f1)(struct gfc_expr *, struct gfc_expr *);
1631   void (*f1m)(struct gfc_expr *, struct gfc_actual_arglist *);
1632   void (*f2)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1633   void (*f3)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1634              struct gfc_expr *);
1635   void (*f4)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1636              struct gfc_expr *, struct gfc_expr *);
1637   void (*f5)(struct gfc_expr *, struct gfc_expr *, struct gfc_expr *,
1638              struct gfc_expr *, struct gfc_expr *, struct gfc_expr *);
1639   void (*s1)(struct gfc_code *);
1640 }
1641 gfc_resolve_f;
1642
1643
1644 typedef struct gfc_intrinsic_sym
1645 {
1646   const char *name, *lib_name;
1647   gfc_intrinsic_arg *formal;
1648   gfc_typespec ts;
1649   unsigned elemental:1, inquiry:1, transformational:1, pure:1,
1650     generic:1, specific:1, actual_ok:1, noreturn:1, conversion:1,
1651     from_module:1;
1652
1653   int standard;
1654
1655   gfc_simplify_f simplify;
1656   gfc_check_f check;
1657   gfc_resolve_f resolve;
1658   struct gfc_intrinsic_sym *specific_head, *next;
1659   gfc_isym_id id;
1660
1661 }
1662 gfc_intrinsic_sym;
1663
1664
1665 /* Expression nodes.  The expression node types deserve explanations,
1666    since the last couple can be easily misconstrued:
1667
1668    EXPR_OP         Operator node pointing to one or two other nodes
1669    EXPR_FUNCTION   Function call, symbol points to function's name
1670    EXPR_CONSTANT   A scalar constant: Logical, String, Real, Int or Complex
1671    EXPR_VARIABLE   An Lvalue with a root symbol and possible reference list
1672                    which expresses structure, array and substring refs.
1673    EXPR_NULL       The NULL pointer value (which also has a basic type).
1674    EXPR_SUBSTRING  A substring of a constant string
1675    EXPR_STRUCTURE  A structure constructor
1676    EXPR_ARRAY      An array constructor.
1677    EXPR_COMPCALL   Function (or subroutine) call of a procedure pointer
1678                    component or type-bound procedure.  */
1679
1680 #include <gmp.h>
1681 #include <mpfr.h>
1682 #include <mpc.h>
1683 #define GFC_RND_MODE GMP_RNDN
1684 #define GFC_MPC_RND_MODE MPC_RNDNN
1685
1686 typedef splay_tree gfc_constructor_base;
1687
1688 typedef struct gfc_expr
1689 {
1690   expr_t expr_type;
1691
1692   gfc_typespec ts;      /* These two refer to the overall expression */
1693
1694   int rank;
1695   mpz_t *shape;         /* Can be NULL if shape is unknown at compile time */
1696
1697   /* Nonnull for functions and structure constructors, may also used to hold the
1698      base-object for component calls.  */
1699   gfc_symtree *symtree;
1700
1701   gfc_ref *ref;
1702
1703   locus where;
1704
1705   /* Used to store the base expression in component calls, when the expression
1706      is not a variable.  */
1707   struct gfc_expr *base_expr;
1708
1709   /* is_boz is true if the integer is regarded as BOZ bitpatten and is_snan
1710      denotes a signalling not-a-number.  */
1711   unsigned int is_boz : 1, is_snan : 1;
1712
1713   /* Sometimes, when an error has been emitted, it is necessary to prevent
1714       it from recurring.  */
1715   unsigned int error : 1;
1716
1717   /* Mark an expression where a user operator has been substituted by
1718      a function call in interface.c(gfc_extend_expr).  */
1719   unsigned int user_operator : 1;
1720
1721   /* Mark an expression as being a MOLD argument of ALLOCATE.  */
1722   unsigned int mold : 1;
1723
1724   /* If an expression comes from a Hollerith constant or compile-time
1725      evaluation of a transfer statement, it may have a prescribed target-
1726      memory representation, and these cannot always be backformed from
1727      the value.  */
1728   struct
1729   {
1730     int length;
1731     char *string;
1732   }
1733   representation;
1734
1735   union
1736   {
1737     int logical;
1738
1739     io_kind iokind;
1740
1741     mpz_t integer;
1742
1743     mpfr_t real;
1744
1745     mpc_t complex;
1746
1747     struct
1748     {
1749       gfc_intrinsic_op op;
1750       gfc_user_op *uop;
1751       struct gfc_expr *op1, *op2;
1752     }
1753     op;
1754
1755     struct
1756     {
1757       gfc_actual_arglist *actual;
1758       const char *name; /* Points to the ultimate name of the function */
1759       gfc_intrinsic_sym *isym;
1760       gfc_symbol *esym;
1761     }
1762     function;
1763
1764     struct
1765     {
1766       gfc_actual_arglist* actual;
1767       const char* name;
1768       /* Base-object, whose component was called.  NULL means that it should
1769          be taken from symtree/ref.  */
1770       struct gfc_expr* base_object;
1771       gfc_typebound_proc* tbp; /* Should overlap with esym.  */
1772
1773       /* For type-bound operators, we want to call PASS procedures but already
1774          have the full arglist; mark this, so that it is not extended by the
1775          PASS argument.  */
1776       unsigned ignore_pass:1;
1777
1778       /* Do assign-calls rather than calls, that is appropriate dependency
1779          checking.  */
1780       unsigned assign:1;
1781     }
1782     compcall;
1783
1784     struct
1785     {
1786       int length;
1787       gfc_char_t *string;
1788     }
1789     character;
1790
1791     gfc_constructor_base constructor;
1792   }
1793   value;
1794
1795 }
1796 gfc_expr;
1797
1798
1799 #define gfc_get_shape(rank) (XCNEWVEC (mpz_t, (rank)))
1800
1801 /* Structures for information associated with different kinds of
1802    numbers.  The first set of integer parameters define all there is
1803    to know about a particular kind.  The rest of the elements are
1804    computed from the first elements.  */
1805
1806 typedef struct
1807 {
1808   /* Values really representable by the target.  */
1809   mpz_t huge, pedantic_min_int, min_int;
1810
1811   int kind, radix, digits, bit_size, range;
1812
1813   /* True if the C type of the given name maps to this precision.
1814      Note that more than one bit can be set.  */
1815   unsigned int c_char : 1;
1816   unsigned int c_short : 1;
1817   unsigned int c_int : 1;
1818   unsigned int c_long : 1;
1819   unsigned int c_long_long : 1;
1820 }
1821 gfc_integer_info;
1822
1823 extern gfc_integer_info gfc_integer_kinds[];
1824
1825
1826 typedef struct
1827 {
1828   int kind, bit_size;
1829
1830   /* True if the C++ type bool, C99 type _Bool, maps to this precision.  */
1831   unsigned int c_bool : 1;
1832 }
1833 gfc_logical_info;
1834
1835 extern gfc_logical_info gfc_logical_kinds[];
1836
1837
1838 typedef struct
1839 {
1840   mpfr_t epsilon, huge, tiny, subnormal;
1841   int kind, radix, digits, min_exponent, max_exponent;
1842   int range, precision;
1843
1844   /* The precision of the type as reported by GET_MODE_PRECISION.  */
1845   int mode_precision;
1846
1847   /* True if the C type of the given name maps to this precision.
1848      Note that more than one bit can be set.  */
1849   unsigned int c_float : 1;
1850   unsigned int c_double : 1;
1851   unsigned int c_long_double : 1;
1852   unsigned int c_float128 : 1;
1853 }
1854 gfc_real_info;
1855
1856 extern gfc_real_info gfc_real_kinds[];
1857
1858 typedef struct
1859 {
1860   int kind, bit_size;
1861   const char *name;
1862 }
1863 gfc_character_info;
1864
1865 extern gfc_character_info gfc_character_kinds[];
1866
1867
1868 /* Equivalence structures.  Equivalent lvalues are linked along the
1869    *eq pointer, equivalence sets are strung along the *next node.  */
1870 typedef struct gfc_equiv
1871 {
1872   struct gfc_equiv *next, *eq;
1873   gfc_expr *expr;
1874   const char *module;
1875   int used;
1876 }
1877 gfc_equiv;
1878
1879 #define gfc_get_equiv() XCNEW (gfc_equiv)
1880
1881 /* Holds a single equivalence member after processing.  */
1882 typedef struct gfc_equiv_info
1883 {
1884   gfc_symbol *sym;
1885   HOST_WIDE_INT offset;
1886   HOST_WIDE_INT length;
1887   struct gfc_equiv_info *next;
1888 } gfc_equiv_info;
1889
1890 /* Holds equivalence groups, after they have been processed.  */
1891 typedef struct gfc_equiv_list
1892 {
1893   gfc_equiv_info *equiv;
1894   struct gfc_equiv_list *next;
1895 } gfc_equiv_list;
1896
1897 /* gfc_case stores the selector list of a case statement.  The *low
1898    and *high pointers can point to the same expression in the case of
1899    a single value.  If *high is NULL, the selection is from *low
1900    upwards, if *low is NULL the selection is *high downwards.
1901
1902    This structure has separate fields to allow single and double linked
1903    lists of CASEs at the same time.  The singe linked list along the NEXT
1904    field is a list of cases for a single CASE label.  The double linked
1905    list along the LEFT/RIGHT fields is used to detect overlap and to
1906    build a table of the cases for SELECT constructs with a CHARACTER
1907    case expression.  */
1908
1909 typedef struct gfc_case
1910 {
1911   /* Where we saw this case.  */
1912   locus where;
1913   int n;
1914
1915   /* Case range values.  If (low == high), it's a single value.  If one of
1916      the labels is NULL, it's an unbounded case.  If both are NULL, this
1917      represents the default case.  */
1918   gfc_expr *low, *high;
1919
1920   /* Only used for SELECT TYPE.  */
1921   gfc_typespec ts;
1922
1923   /* Next case label in the list of cases for a single CASE label.  */
1924   struct gfc_case *next;
1925
1926   /* Used for detecting overlap, and for code generation.  */
1927   struct gfc_case *left, *right;
1928
1929   /* True if this case label can never be matched.  */
1930   int unreachable;
1931 }
1932 gfc_case;
1933
1934 #define gfc_get_case() XCNEW (gfc_case)
1935
1936
1937 typedef struct
1938 {
1939   gfc_expr *var, *start, *end, *step;
1940 }
1941 gfc_iterator;
1942
1943 #define gfc_get_iterator() XCNEW (gfc_iterator)
1944
1945
1946 /* Allocation structure for ALLOCATE, DEALLOCATE and NULLIFY statements.  */
1947
1948 typedef struct gfc_alloc
1949 {
1950   gfc_expr *expr;
1951   struct gfc_alloc *next;
1952 }
1953 gfc_alloc;
1954
1955 #define gfc_get_alloc() XCNEW (gfc_alloc)
1956
1957
1958 typedef struct
1959 {
1960   gfc_expr *unit, *file, *status, *access, *form, *recl,
1961     *blank, *position, *action, *delim, *pad, *iostat, *iomsg, *convert,
1962     *decimal, *encoding, *round, *sign, *asynchronous, *id, *newunit;
1963   gfc_st_label *err;
1964 }
1965 gfc_open;
1966
1967
1968 typedef struct
1969 {
1970   gfc_expr *unit, *status, *iostat, *iomsg;
1971   gfc_st_label *err;
1972 }
1973 gfc_close;
1974
1975
1976 typedef struct
1977 {
1978   gfc_expr *unit, *iostat, *iomsg;
1979   gfc_st_label *err;
1980 }
1981 gfc_filepos;
1982
1983
1984 typedef struct
1985 {
1986   gfc_expr *unit, *file, *iostat, *exist, *opened, *number, *named,
1987     *name, *access, *sequential, *direct, *form, *formatted,
1988     *unformatted, *recl, *nextrec, *blank, *position, *action, *read,
1989     *write, *readwrite, *delim, *pad, *iolength, *iomsg, *convert, *strm_pos,
1990     *asynchronous, *decimal, *encoding, *pending, *round, *sign, *size, *id;
1991
1992   gfc_st_label *err;
1993
1994 }
1995 gfc_inquire;
1996
1997
1998 typedef struct
1999 {
2000   gfc_expr *unit, *iostat, *iomsg, *id;
2001   gfc_st_label *err, *end, *eor;
2002 }
2003 gfc_wait;
2004
2005
2006 typedef struct
2007 {
2008   gfc_expr *io_unit, *format_expr, *rec, *advance, *iostat, *size, *iomsg,
2009            *id, *pos, *asynchronous, *blank, *decimal, *delim, *pad, *round,
2010            *sign, *extra_comma, *dt_io_kind;
2011
2012   gfc_symbol *namelist;
2013   /* A format_label of `format_asterisk' indicates the "*" format */
2014   gfc_st_label *format_label;
2015   gfc_st_label *err, *end, *eor;
2016
2017   locus eor_where, end_where, err_where;
2018 }
2019 gfc_dt;
2020
2021
2022 typedef struct gfc_forall_iterator
2023 {
2024   gfc_expr *var, *start, *end, *stride;
2025   struct gfc_forall_iterator *next;
2026 }
2027 gfc_forall_iterator;
2028
2029
2030 /* Linked list to store associations in an ASSOCIATE statement.  */
2031
2032 typedef struct gfc_association_list
2033 {
2034   struct gfc_association_list *next;
2035
2036   /* Whether this is association to a variable that can be changed; otherwise,
2037      it's association to an expression and the name may not be used as
2038      lvalue.  */
2039   unsigned variable:1;
2040
2041   /* True if this struct is currently only linked to from a gfc_symbol rather
2042      than as part of a real list in gfc_code->ext.block.assoc.  This may
2043      happen for SELECT TYPE temporaries and must be considered
2044      for memory handling.  */
2045   unsigned dangling:1;
2046
2047   char name[GFC_MAX_SYMBOL_LEN + 1];
2048   gfc_symtree *st; /* Symtree corresponding to name.  */
2049   locus where;
2050
2051   gfc_expr *target;
2052 }
2053 gfc_association_list;
2054 #define gfc_get_association_list() XCNEW (gfc_association_list)
2055
2056
2057 /* Executable statements that fill gfc_code structures.  */
2058 typedef enum
2059 {
2060   EXEC_NOP = 1, EXEC_END_NESTED_BLOCK, EXEC_END_BLOCK, EXEC_ASSIGN,
2061   EXEC_LABEL_ASSIGN, EXEC_POINTER_ASSIGN, EXEC_CRITICAL, EXEC_ERROR_STOP,
2062   EXEC_GOTO, EXEC_CALL, EXEC_COMPCALL, EXEC_ASSIGN_CALL, EXEC_RETURN,
2063   EXEC_ENTRY, EXEC_PAUSE, EXEC_STOP, EXEC_CONTINUE, EXEC_INIT_ASSIGN,
2064   EXEC_IF, EXEC_ARITHMETIC_IF, EXEC_DO, EXEC_DO_CONCURRENT, EXEC_DO_WHILE,
2065   EXEC_SELECT, EXEC_BLOCK, EXEC_FORALL, EXEC_WHERE, EXEC_CYCLE, EXEC_EXIT,
2066   EXEC_CALL_PPC, EXEC_ALLOCATE, EXEC_DEALLOCATE, EXEC_END_PROCEDURE,
2067   EXEC_SELECT_TYPE, EXEC_SYNC_ALL, EXEC_SYNC_MEMORY, EXEC_SYNC_IMAGES,
2068   EXEC_OPEN, EXEC_CLOSE, EXEC_WAIT,
2069   EXEC_READ, EXEC_WRITE, EXEC_IOLENGTH, EXEC_TRANSFER, EXEC_DT_END,
2070   EXEC_BACKSPACE, EXEC_ENDFILE, EXEC_INQUIRE, EXEC_REWIND, EXEC_FLUSH,
2071   EXEC_LOCK, EXEC_UNLOCK,
2072   EXEC_OMP_CRITICAL, EXEC_OMP_DO, EXEC_OMP_FLUSH, EXEC_OMP_MASTER,
2073   EXEC_OMP_ORDERED, EXEC_OMP_PARALLEL, EXEC_OMP_PARALLEL_DO,
2074   EXEC_OMP_PARALLEL_SECTIONS, EXEC_OMP_PARALLEL_WORKSHARE,
2075   EXEC_OMP_SECTIONS, EXEC_OMP_SINGLE, EXEC_OMP_WORKSHARE,
2076   EXEC_OMP_ATOMIC, EXEC_OMP_BARRIER, EXEC_OMP_END_NOWAIT,
2077   EXEC_OMP_END_SINGLE, EXEC_OMP_TASK, EXEC_OMP_TASKWAIT,
2078   EXEC_OMP_TASKYIELD
2079 }
2080 gfc_exec_op;
2081
2082 typedef enum
2083 {
2084   GFC_OMP_ATOMIC_UPDATE,
2085   GFC_OMP_ATOMIC_READ,
2086   GFC_OMP_ATOMIC_WRITE,
2087   GFC_OMP_ATOMIC_CAPTURE
2088 }
2089 gfc_omp_atomic_op;
2090
2091 typedef struct gfc_code
2092 {
2093   gfc_exec_op op;
2094
2095   struct gfc_code *block, *next;
2096   locus loc;
2097
2098   gfc_st_label *here, *label1, *label2, *label3;
2099   gfc_symtree *symtree;
2100   gfc_expr *expr1, *expr2, *expr3, *expr4;
2101   /* A name isn't sufficient to identify a subroutine, we need the actual
2102      symbol for the interface definition.
2103   const char *sub_name;  */
2104   gfc_symbol *resolved_sym;
2105   gfc_intrinsic_sym *resolved_isym;
2106
2107   union
2108   {
2109     gfc_actual_arglist *actual;
2110     gfc_iterator *iterator;
2111
2112     struct
2113     {
2114       gfc_typespec ts;
2115       gfc_alloc *list;
2116     }
2117     alloc;
2118
2119     struct
2120     {
2121       gfc_namespace *ns;
2122       gfc_association_list *assoc;
2123       gfc_case *case_list;
2124     }
2125     block;
2126
2127     gfc_open *open;
2128     gfc_close *close;
2129     gfc_filepos *filepos;
2130     gfc_inquire *inquire;
2131     gfc_wait *wait;
2132     gfc_dt *dt;
2133     gfc_forall_iterator *forall_iterator;
2134     struct gfc_code *which_construct;
2135     int stop_code;
2136     gfc_entry_list *entry;
2137     gfc_omp_clauses *omp_clauses;
2138     const char *omp_name;
2139     gfc_namelist *omp_namelist;
2140     bool omp_bool;
2141     gfc_omp_atomic_op omp_atomic;
2142   }
2143   ext;          /* Points to additional structures required by statement */
2144
2145   /* Cycle and break labels in constructs.  */
2146   tree cycle_label;
2147   tree exit_label;
2148 }
2149 gfc_code;
2150
2151
2152 /* Storage for DATA statements.  */
2153 typedef struct gfc_data_variable
2154 {
2155   gfc_expr *expr;
2156   gfc_iterator iter;
2157   struct gfc_data_variable *list, *next;
2158 }
2159 gfc_data_variable;
2160
2161
2162 typedef struct gfc_data_value
2163 {
2164   mpz_t repeat;
2165   gfc_expr *expr;
2166   struct gfc_data_value *next;
2167 }
2168 gfc_data_value;
2169
2170
2171 typedef struct gfc_data
2172 {
2173   gfc_data_variable *var;
2174   gfc_data_value *value;
2175   locus where;
2176
2177   struct gfc_data *next;
2178 }
2179 gfc_data;
2180
2181
2182 /* Structure for holding compile options */
2183 typedef struct
2184 {
2185   char *module_dir;
2186   gfc_source_form source_form;
2187   /* Maximum line lengths in fixed- and free-form source, respectively.
2188      When fixed_line_length or free_line_length are 0, the whole line is used,
2189      regardless of length.
2190
2191      If the user requests a fixed_line_length <7 then gfc_init_options()
2192      emits a fatal error.  */
2193   int fixed_line_length;
2194   int free_line_length;
2195   /* Maximum number of continuation lines in fixed- and free-form source,
2196      respectively.  */
2197   int max_continue_fixed;
2198   int max_continue_free;
2199   int max_identifier_length;
2200   int dump_fortran_original;
2201   int dump_fortran_optimized;
2202
2203   int warn_aliasing;
2204   int warn_ampersand;
2205   int gfc_warn_conversion;
2206   int warn_c_binding_type;
2207   int warn_conversion_extra;
2208   int warn_function_elimination;
2209   int warn_implicit_interface;
2210   int warn_implicit_procedure;
2211   int warn_line_truncation;
2212   int warn_surprising;
2213   int warn_tabs;
2214   int warn_underflow;
2215   int warn_intrinsic_shadow;
2216   int warn_intrinsics_std;
2217   int warn_character_truncation;
2218   int warn_array_temp;
2219   int warn_align_commons;
2220   int warn_real_q_constant;
2221   int warn_unused_dummy_argument;
2222   int warn_realloc_lhs;
2223   int warn_realloc_lhs_all;
2224   int max_errors;
2225
2226   int flag_all_intrinsics;
2227   int flag_default_double;
2228   int flag_default_integer;
2229   int flag_default_real;
2230   int flag_integer4_kind;
2231   int flag_real4_kind;
2232   int flag_real8_kind;
2233   int flag_dollar_ok;
2234   int flag_underscoring;
2235   int flag_second_underscore;
2236   int flag_implicit_none;
2237   int flag_max_stack_var_size;
2238   int flag_max_array_constructor;
2239   int flag_range_check;
2240   int flag_pack_derived;
2241   int flag_repack_arrays;
2242   int flag_preprocessed;
2243   int flag_f2c;
2244   int flag_automatic;
2245   int flag_backslash;
2246   int flag_backtrace;
2247   int flag_allow_leading_underscore;
2248   int flag_external_blas;
2249   int blas_matmul_limit;
2250   int flag_cray_pointer;
2251   int flag_d_lines;
2252   int gfc_flag_openmp;
2253   int flag_sign_zero;
2254   int flag_stack_arrays;
2255   int flag_module_private;
2256   int flag_recursive;
2257   int flag_init_local_zero;
2258   int flag_init_integer;
2259   int flag_init_integer_value;
2260   int flag_init_real;
2261   int flag_init_logical;
2262   int flag_init_character;
2263   char flag_init_character_value;
2264   int flag_align_commons;
2265   int flag_whole_file;
2266   int flag_protect_parens;
2267   int flag_realloc_lhs;
2268   int flag_aggressive_function_elimination;
2269   int flag_frontend_optimize;
2270
2271   int fpe;
2272   int rtcheck;
2273   gfc_fcoarray coarray;
2274
2275   int warn_std;
2276   int allow_std;
2277   int convert;
2278   int record_marker;
2279   int max_subrecord_length;
2280 }
2281 gfc_option_t;
2282
2283 extern gfc_option_t gfc_option;
2284
2285 /* Constructor nodes for array and structure constructors.  */
2286 typedef struct gfc_constructor
2287 {
2288   gfc_constructor_base base;
2289   mpz_t offset;               /* Offset within a constructor, used as
2290                                  key within base. */
2291
2292   gfc_expr *expr;
2293   gfc_iterator *iterator;
2294   locus where;
2295
2296   union
2297   {
2298      gfc_component *component; /* Record the component being initialized.  */
2299   }
2300   n;
2301   mpz_t repeat; /* Record the repeat number of initial values in data
2302                   statement like "data a/5*10/".  */
2303 }
2304 gfc_constructor;
2305
2306
2307 typedef struct iterator_stack
2308 {
2309   gfc_symtree *variable;
2310   mpz_t value;
2311   struct iterator_stack *prev;
2312 }
2313 iterator_stack;
2314 extern iterator_stack *iter_stack;
2315
2316
2317 /* Used for (possibly nested) SELECT TYPE statements.  */
2318 typedef struct gfc_select_type_stack
2319 {
2320   gfc_symbol *selector;                 /* Current selector variable.  */
2321   gfc_symtree *tmp;                     /* Current temporary variable.  */
2322   struct gfc_select_type_stack *prev;   /* Previous element on stack.  */
2323 }
2324 gfc_select_type_stack;
2325 extern gfc_select_type_stack *select_type_stack;
2326 #define gfc_get_select_type_stack() XCNEW (gfc_select_type_stack)
2327
2328
2329 /* Node in the linked list used for storing finalizer procedures.  */
2330
2331 typedef struct gfc_finalizer
2332 {
2333   struct gfc_finalizer* next;
2334   locus where; /* Where the FINAL declaration occurred.  */
2335
2336   /* Up to resolution, we want the gfc_symbol, there we lookup the corresponding
2337      symtree and later need only that.  This way, we can access and call the
2338      finalizers from every context as they should be "always accessible".  I
2339      don't make this a union because we need the information whether proc_sym is
2340      still referenced or not for dereferencing it on deleting a gfc_finalizer
2341      structure.  */
2342   gfc_symbol*  proc_sym;
2343   gfc_symtree* proc_tree;
2344 }
2345 gfc_finalizer;
2346 #define gfc_get_finalizer() XCNEW (gfc_finalizer)
2347
2348
2349 /************************ Function prototypes *************************/
2350
2351 /* decl.c */
2352 bool gfc_in_match_data (void);
2353 match gfc_match_char_spec (gfc_typespec *);
2354
2355 /* scanner.c */
2356 void gfc_scanner_done_1 (void);
2357 void gfc_scanner_init_1 (void);
2358
2359 void gfc_add_include_path (const char *, bool, bool);
2360 void gfc_add_intrinsic_modules_path (const char *);
2361 void gfc_release_include_path (void);
2362 FILE *gfc_open_included_file (const char *, bool, bool);
2363 FILE *gfc_open_intrinsic_module (const char *);
2364
2365 int gfc_at_end (void);
2366 int gfc_at_eof (void);
2367 int gfc_at_bol (void);
2368 int gfc_at_eol (void);
2369 void gfc_advance_line (void);
2370 int gfc_check_include (void);
2371 int gfc_define_undef_line (void);
2372
2373 int gfc_wide_is_printable (gfc_char_t);
2374 int gfc_wide_is_digit (gfc_char_t);
2375 int gfc_wide_fits_in_byte (gfc_char_t);
2376 gfc_char_t gfc_wide_tolower (gfc_char_t);
2377 gfc_char_t gfc_wide_toupper (gfc_char_t);
2378 size_t gfc_wide_strlen (const gfc_char_t *);
2379 int gfc_wide_strncasecmp (const gfc_char_t *, const char *, size_t);
2380 gfc_char_t *gfc_wide_memset (gfc_char_t *, gfc_char_t, size_t);
2381 char *gfc_widechar_to_char (const gfc_char_t *, int);
2382 gfc_char_t *gfc_char_to_widechar (const char *);
2383
2384 #define gfc_get_wide_string(n) XCNEWVEC (gfc_char_t, n)
2385
2386 void gfc_skip_comments (void);
2387 gfc_char_t gfc_next_char_literal (gfc_instring);
2388 gfc_char_t gfc_next_char (void);
2389 char gfc_next_ascii_char (void);
2390 gfc_char_t gfc_peek_char (void);
2391 char gfc_peek_ascii_char (void);
2392 void gfc_error_recovery (void);
2393 void gfc_gobble_whitespace (void);
2394 gfc_try gfc_new_file (void);
2395 const char * gfc_read_orig_filename (const char *, const char **);
2396
2397 extern gfc_source_form gfc_current_form;
2398 extern const char *gfc_source_file;
2399 extern locus gfc_current_locus;
2400
2401 void gfc_start_source_files (void);
2402 void gfc_end_source_files (void);
2403
2404 /* misc.c */
2405 int gfc_terminal_width (void);
2406 void gfc_clear_ts (gfc_typespec *);
2407 FILE *gfc_open_file (const char *);
2408 const char *gfc_basic_typename (bt);
2409 const char *gfc_typename (gfc_typespec *);
2410 const char *gfc_op2string (gfc_intrinsic_op);
2411 const char *gfc_code2string (const mstring *, int);
2412 int gfc_string2code (const mstring *, const char *);
2413 const char *gfc_intent_string (sym_intent);
2414
2415 void gfc_init_1 (void);
2416 void gfc_init_2 (void);
2417 void gfc_done_1 (void);
2418 void gfc_done_2 (void);
2419
2420 int get_c_kind (const char *, CInteropKind_t *);
2421
2422 /* options.c */
2423 unsigned int gfc_option_lang_mask (void);
2424 void gfc_init_options_struct (struct gcc_options *);
2425 void gfc_init_options (unsigned int,
2426                        struct cl_decoded_option *);
2427 bool gfc_handle_option (size_t, const char *, int, int, location_t,
2428                         const struct cl_option_handlers *);
2429 bool gfc_post_options (const char **);
2430 char *gfc_get_option_string (void);
2431
2432 /* f95-lang.c */
2433 void gfc_maybe_initialize_eh (void);
2434
2435 /* iresolve.c */
2436 const char * gfc_get_string (const char *, ...) ATTRIBUTE_PRINTF_1;
2437 bool gfc_find_sym_in_expr (gfc_symbol *, gfc_expr *);
2438
2439 /* error.c */
2440
2441 typedef struct gfc_error_buf
2442 {
2443   int flag;
2444   size_t allocated, index;
2445   char *message;
2446 } gfc_error_buf;
2447
2448 void gfc_error_init_1 (void);
2449 void gfc_buffer_error (int);
2450
2451 const char *gfc_print_wide_char (gfc_char_t);
2452
2453 void gfc_warning (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2454 void gfc_warning_now (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2455 void gfc_clear_warning (void);
2456 void gfc_warning_check (void);
2457
2458 void gfc_error (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2459 void gfc_error_now (const char *, ...) ATTRIBUTE_GCC_GFC(1,2);
2460 void gfc_fatal_error (const char *, ...) ATTRIBUTE_NORETURN ATTRIBUTE_GCC_GFC(1,2);
2461 void gfc_internal_error (const char *, ...) ATTRIBUTE_NORETURN ATTRIBUTE_GCC_GFC(1,2);
2462 void gfc_clear_error (void);
2463 int gfc_error_check (void);
2464 int gfc_error_flag_test (void);
2465
2466 notification gfc_notification_std (int);
2467 gfc_try gfc_notify_std (int, const char *, ...) ATTRIBUTE_GCC_GFC(2,3);
2468
2469 /* A general purpose syntax error.  */
2470 #define gfc_syntax_error(ST)    \
2471   gfc_error ("Syntax error in %s statement at %C", gfc_ascii_statement (ST));
2472
2473 void gfc_push_error (gfc_error_buf *);
2474 void gfc_pop_error (gfc_error_buf *);
2475 void gfc_free_error (gfc_error_buf *);
2476
2477 void gfc_get_errors (int *, int *);
2478 void gfc_errors_to_warnings (int);
2479
2480 /* arith.c */
2481 void gfc_arith_init_1 (void);
2482 void gfc_arith_done_1 (void);
2483 arith gfc_check_integer_range (mpz_t p, int kind);
2484 bool gfc_check_character_range (gfc_char_t, int);
2485
2486 /* trans-types.c */
2487 gfc_try gfc_check_any_c_kind (gfc_typespec *);
2488 int gfc_validate_kind (bt, int, bool);
2489 int gfc_get_int_kind_from_width_isofortranenv (int size);
2490 int gfc_get_real_kind_from_width_isofortranenv (int size);
2491 tree gfc_get_derived_type (gfc_symbol * derived);
2492 extern int gfc_index_integer_kind;
2493 extern int gfc_default_integer_kind;
2494 extern int gfc_max_integer_kind;
2495 extern int gfc_default_real_kind;
2496 extern int gfc_default_double_kind;
2497 extern int gfc_default_character_kind;
2498 extern int gfc_default_logical_kind;
2499 extern int gfc_default_complex_kind;
2500 extern int gfc_c_int_kind;
2501 extern int gfc_atomic_int_kind;
2502 extern int gfc_atomic_logical_kind;
2503 extern int gfc_intio_kind;
2504 extern int gfc_charlen_int_kind;
2505 extern int gfc_numeric_storage_size;
2506 extern int gfc_character_storage_size;
2507
2508 /* symbol.c */
2509 void gfc_clear_new_implicit (void);
2510 gfc_try gfc_add_new_implicit_range (int, int);
2511 gfc_try gfc_merge_new_implicit (gfc_typespec *);
2512 void gfc_set_implicit_none (void);
2513 void gfc_check_function_type (gfc_namespace *);
2514 bool gfc_is_intrinsic_typename (const char *);
2515
2516 gfc_typespec *gfc_get_default_type (const char *, gfc_namespace *);
2517 gfc_try gfc_set_default_type (gfc_symbol *, int, gfc_namespace *);
2518
2519 void gfc_set_sym_referenced (gfc_symbol *);
2520
2521 gfc_try gfc_add_attribute (symbol_attribute *, locus *);
2522 gfc_try gfc_add_ext_attribute (symbol_attribute *, ext_attr_id_t, locus *);
2523 gfc_try gfc_add_allocatable (symbol_attribute *, locus *);
2524 gfc_try gfc_add_codimension (symbol_attribute *, const char *, locus *);
2525 gfc_try gfc_add_contiguous (symbol_attribute *, const char *, locus *);
2526 gfc_try gfc_add_dimension (symbol_attribute *, const char *, locus *);
2527 gfc_try gfc_add_external (symbol_attribute *, locus *);
2528 gfc_try gfc_add_intrinsic (symbol_attribute *, locus *);
2529 gfc_try gfc_add_optional (symbol_attribute *, locus *);
2530 gfc_try gfc_add_pointer (symbol_attribute *, locus *);
2531 gfc_try gfc_add_cray_pointer (symbol_attribute *, locus *);
2532 gfc_try gfc_add_cray_pointee (symbol_attribute *, locus *);
2533 match gfc_mod_pointee_as (gfc_array_spec *);
2534 gfc_try gfc_add_protected (symbol_attribute *, const char *, locus *);
2535 gfc_try gfc_add_result (symbol_attribute *, const char *, locus *);
2536 gfc_try gfc_add_save (symbol_attribute *, save_state, const char *, locus *);
2537 gfc_try gfc_add_threadprivate (symbol_attribute *, const char *, locus *);
2538 gfc_try gfc_add_saved_common (symbol_attribute *, locus *);
2539 gfc_try gfc_add_target (symbol_attribute *, locus *);
2540 gfc_try gfc_add_dummy (symbol_attribute *, const char *, locus *);
2541 gfc_try gfc_add_generic (symbol_attribute *, const char *, locus *);
2542 gfc_try gfc_add_common (symbol_attribute *, locus *);
2543 gfc_try gfc_add_in_common (symbol_attribute *, const char *, locus *);
2544 gfc_try gfc_add_in_equivalence (symbol_attribute *, const char *, locus *);
2545 gfc_try gfc_add_data (symbol_attribute *, const char *, locus *);
2546 gfc_try gfc_add_in_namelist (symbol_attribute *, const char *, locus *);
2547 gfc_try gfc_add_sequence (symbol_attribute *, const char *, locus *);
2548 gfc_try gfc_add_elemental (symbol_attribute *, locus *);
2549 gfc_try gfc_add_pure (symbol_attribute *, locus *);
2550 gfc_try gfc_add_recursive (symbol_attribute *, locus *);
2551 gfc_try gfc_add_function (symbol_attribute *, const char *, locus *);
2552 gfc_try gfc_add_subroutine (symbol_attribute *, const char *, locus *);
2553 gfc_try gfc_add_volatile (symbol_attribute *, const char *, locus *);
2554 gfc_try gfc_add_asynchronous (symbol_attribute *, const char *, locus *);
2555 gfc_try gfc_add_proc (symbol_attribute *attr, const char *name, locus *where);
2556 gfc_try gfc_add_abstract (symbol_attribute* attr, locus* where);
2557
2558 gfc_try gfc_add_access (symbol_attribute *, gfc_access, const char *, locus *);
2559 gfc_try gfc_add_is_bind_c (symbol_attribute *, const char *, locus *, int);
2560 gfc_try gfc_add_extension (symbol_attribute *, locus *);
2561 gfc_try gfc_add_value (symbol_attribute *, const char *, locus *);
2562 gfc_try gfc_add_flavor (symbol_attribute *, sym_flavor, const char *, locus *);
2563 gfc_try gfc_add_entry (symbol_attribute *, const char *, locus *);
2564 gfc_try gfc_add_procedure (symbol_attribute *, procedure_type,
2565                        const char *, locus *);
2566 gfc_try gfc_add_intent (symbol_attribute *, sym_intent, locus *);
2567 gfc_try gfc_add_explicit_interface (gfc_symbol *, ifsrc,
2568                                 gfc_formal_arglist *, locus *);
2569 gfc_try gfc_add_type (gfc_symbol *, gfc_typespec *, locus *);
2570
2571 void gfc_clear_attr (symbol_attribute *);
2572 gfc_try gfc_missing_attr (symbol_attribute *, locus *);
2573 gfc_try gfc_copy_attr (symbol_attribute *, symbol_attribute *, locus *);
2574
2575 gfc_try gfc_add_component (gfc_symbol *, const char *, gfc_component **);
2576 gfc_symbol *gfc_use_derived (gfc_symbol *);
2577 gfc_symtree *gfc_use_derived_tree (gfc_symtree *);
2578 gfc_component *gfc_find_component (gfc_symbol *, const char *, bool, bool);
2579
2580 gfc_st_label *gfc_get_st_label (int);
2581 void gfc_free_st_label (gfc_st_label *);
2582 void gfc_define_st_label (gfc_st_label *, gfc_sl_type, locus *);
2583 gfc_try gfc_reference_st_label (gfc_st_label *, gfc_sl_type);
2584
2585 gfc_namespace *gfc_get_namespace (gfc_namespace *, int);
2586 gfc_symtree *gfc_new_symtree (gfc_symtree **, const char *);
2587 gfc_symtree *gfc_find_symtree (gfc_symtree *, const char *);
2588 void gfc_delete_symtree (gfc_symtree **, const char *);
2589 gfc_symtree *gfc_get_unique_symtree (gfc_namespace *);
2590 gfc_user_op *gfc_get_uop (const char *);
2591 gfc_user_op *gfc_find_uop (const char *, gfc_namespace *);
2592 void gfc_free_symbol (gfc_symbol *);
2593 void gfc_release_symbol (gfc_symbol *);
2594 gfc_symbol *gfc_new_symbol (const char *, gfc_namespace *);
2595 gfc_symtree* gfc_find_symtree_in_proc (const char *, gfc_namespace *);
2596 int gfc_find_symbol (const char *, gfc_namespace *, int, gfc_symbol **);
2597 int gfc_find_sym_tree (const char *, gfc_namespace *, int, gfc_symtree **);
2598 int gfc_get_symbol (const char *, gfc_namespace *, gfc_symbol **);
2599 gfc_try gfc_verify_c_interop (gfc_typespec *);
2600 gfc_try gfc_verify_c_interop_param (gfc_symbol *);
2601 gfc_try verify_bind_c_sym (gfc_symbol *, gfc_typespec *, int, gfc_common_head *);
2602 gfc_try verify_bind_c_derived_type (gfc_symbol *);
2603 gfc_try verify_com_block_vars_c_interop (gfc_common_head *);
2604 void generate_isocbinding_symbol (const char *, iso_c_binding_symbol, const char *);
2605 gfc_symbol *get_iso_c_sym (gfc_symbol *, char *, const char *, int);
2606 int gfc_get_sym_tree (const char *, gfc_namespace *, gfc_symtree **, bool);
2607 int gfc_get_ha_symbol (const char *, gfc_symbol **);
2608 int gfc_get_ha_sym_tree (const char *, gfc_symtree **);
2609
2610 void gfc_undo_symbols (void);
2611 void gfc_commit_symbols (void);
2612 void gfc_commit_symbol (gfc_symbol *);
2613 gfc_charlen *gfc_new_charlen (gfc_namespace *, gfc_charlen *);
2614 void gfc_free_charlen (gfc_charlen *, gfc_charlen *);
2615 void gfc_free_namespace (gfc_namespace *);
2616
2617 void gfc_symbol_init_2 (void);
2618 void gfc_symbol_done_2 (void);
2619
2620 void gfc_traverse_symtree (gfc_symtree *, void (*)(gfc_symtree *));
2621 void gfc_traverse_ns (gfc_namespace *, void (*)(gfc_symbol *));
2622 void gfc_traverse_user_op (gfc_namespace *, void (*)(gfc_user_op *));
2623 void gfc_save_all (gfc_namespace *);
2624
2625 void gfc_enforce_clean_symbol_state (void);
2626 void gfc_free_dt_list (void);
2627
2628
2629 gfc_gsymbol *gfc_get_gsymbol (const char *);
2630 gfc_gsymbol *gfc_find_gsymbol (gfc_gsymbol *, const char *);
2631
2632 gfc_typebound_proc* gfc_get_typebound_proc (gfc_typebound_proc*);
2633 gfc_symbol* gfc_get_derived_super_type (gfc_symbol*);
2634 gfc_symbol* gfc_get_ultimate_derived_super_type (gfc_symbol*);
2635 bool gfc_type_is_extension_of (gfc_symbol *, gfc_symbol *);
2636 bool gfc_type_compatible (gfc_typespec *, gfc_typespec *);
2637
2638 void gfc_copy_formal_args (gfc_symbol *, gfc_symbol *);
2639 void gfc_copy_formal_args_intr (gfc_symbol *, gfc_intrinsic_sym *);
2640 void gfc_copy_formal_args_ppc (gfc_component *, gfc_symbol *);
2641
2642 void gfc_free_finalizer (gfc_finalizer *el); /* Needed in resolve.c, too  */
2643
2644 gfc_try gfc_check_symbol_typed (gfc_symbol*, gfc_namespace*, bool, locus);
2645 gfc_namespace* gfc_find_proc_namespace (gfc_namespace*);
2646
2647 bool gfc_is_associate_pointer (gfc_symbol*);
2648 gfc_symbol * gfc_find_dt_in_generic (gfc_symbol *);
2649
2650 /* intrinsic.c -- true if working in an init-expr, false otherwise.  */
2651 extern bool gfc_init_expr_flag;
2652
2653 /* Given a symbol that we have decided is intrinsic, mark it as such
2654    by placing it into a special module that is otherwise impossible to
2655    read or write.  */
2656
2657 #define gfc_intrinsic_symbol(SYM) SYM->module = gfc_get_string ("(intrinsic)")
2658
2659 void gfc_intrinsic_init_1 (void);
2660 void gfc_intrinsic_done_1 (void);
2661
2662 char gfc_type_letter (bt);
2663 gfc_symbol * gfc_get_intrinsic_sub_symbol (const char *);
2664 gfc_try gfc_convert_type (gfc_expr *, gfc_typespec *, int);
2665 gfc_try gfc_convert_type_warn (gfc_expr *, gfc_typespec *, int, int);
2666 gfc_try gfc_convert_chartype (gfc_expr *, gfc_typespec *);
2667 int gfc_generic_intrinsic (const char *);
2668 int gfc_specific_intrinsic (const char *);
2669 bool gfc_is_intrinsic (gfc_symbol*, int, locus);
2670 int gfc_intrinsic_actual_ok (const char *, const bool);
2671 gfc_intrinsic_sym *gfc_find_function (const char *);
2672 gfc_intrinsic_sym *gfc_find_subroutine (const char *);
2673 gfc_intrinsic_sym *gfc_intrinsic_function_by_id (gfc_isym_id);
2674
2675 match gfc_intrinsic_func_interface (gfc_expr *, int);
2676 match gfc_intrinsic_sub_interface (gfc_code *, int);
2677
2678 void gfc_warn_intrinsic_shadow (const gfc_symbol*, bool, bool);
2679 gfc_try gfc_check_intrinsic_standard (const gfc_intrinsic_sym*, const char**,
2680                                       bool, locus);
2681
2682 /* match.c -- FIXME */
2683 void gfc_free_iterator (gfc_iterator *, int);
2684 void gfc_free_forall_iterator (gfc_forall_iterator *);
2685 void gfc_free_alloc_list (gfc_alloc *);
2686 void gfc_free_namelist (gfc_namelist *);
2687 void gfc_free_equiv (gfc_equiv *);
2688 void gfc_free_equiv_until (gfc_equiv *, gfc_equiv *);
2689 void gfc_free_data (gfc_data *);
2690 void gfc_free_case_list (gfc_case *);
2691
2692 /* matchexp.c -- FIXME too?  */
2693 gfc_expr *gfc_get_parentheses (gfc_expr *);
2694
2695 /* openmp.c */
2696 struct gfc_omp_saved_state { void *ptrs[2]; int ints[1]; };
2697 void gfc_free_omp_clauses (gfc_omp_clauses *);
2698 void gfc_resolve_omp_directive (gfc_code *, gfc_namespace *);
2699 void gfc_resolve_do_iterator (gfc_code *, gfc_symbol *);
2700 void gfc_resolve_omp_parallel_blocks (gfc_code *, gfc_namespace *);
2701 void gfc_resolve_omp_do_blocks (gfc_code *, gfc_namespace *);
2702 void gfc_omp_save_and_clear_state (struct gfc_omp_saved_state *);
2703 void gfc_omp_restore_state (struct gfc_omp_saved_state *);
2704
2705 /* expr.c */
2706 void gfc_free_actual_arglist (gfc_actual_arglist *);
2707 gfc_actual_arglist *gfc_copy_actual_arglist (gfc_actual_arglist *);
2708 const char *gfc_extract_int (gfc_expr *, int *);
2709 bool is_subref_array (gfc_expr *);
2710 bool gfc_is_simply_contiguous (gfc_expr *, bool);
2711 gfc_try gfc_check_init_expr (gfc_expr *);
2712
2713 gfc_expr *gfc_build_conversion (gfc_expr *);
2714 void gfc_free_ref_list (gfc_ref *);
2715 void gfc_type_convert_binary (gfc_expr *, int);
2716 int gfc_is_constant_expr (gfc_expr *);
2717 gfc_try gfc_simplify_expr (gfc_expr *, int);
2718 int gfc_has_vector_index (gfc_expr *);
2719
2720 gfc_expr *gfc_get_expr (void);
2721 gfc_expr *gfc_get_array_expr (bt type, int kind, locus *);
2722 gfc_expr *gfc_get_null_expr (locus *);
2723 gfc_expr *gfc_get_operator_expr (locus *, gfc_intrinsic_op,gfc_expr *, gfc_expr *);
2724 gfc_expr *gfc_get_structure_constructor_expr (bt, int, locus *);
2725 gfc_expr *gfc_get_constant_expr (bt, int, locus *);
2726 gfc_expr *gfc_get_character_expr (int, locus *, const char *, int len);
2727 gfc_expr *gfc_get_int_expr (int, locus *, int);
2728 gfc_expr *gfc_get_logical_expr (int, locus *, bool);
2729 gfc_expr *gfc_get_iokind_expr (locus *, io_kind);
2730
2731 void gfc_clear_shape (mpz_t *shape, int rank);
2732 void gfc_free_shape (mpz_t **shape, int rank);
2733 void gfc_free_expr (gfc_expr *);
2734 void gfc_replace_expr (gfc_expr *, gfc_expr *);
2735 mpz_t *gfc_copy_shape (mpz_t *, int);
2736 mpz_t *gfc_copy_shape_excluding (mpz_t *, int, gfc_expr *);
2737 gfc_expr *gfc_copy_expr (gfc_expr *);
2738 gfc_ref* gfc_copy_ref (gfc_ref*);
2739
2740 gfc_try gfc_specification_expr (gfc_expr *);
2741
2742 int gfc_numeric_ts (gfc_typespec *);
2743 int gfc_kind_max (gfc_expr *, gfc_expr *);
2744
2745 gfc_try gfc_check_conformance (gfc_expr *, gfc_expr *, const char *, ...) ATTRIBUTE_PRINTF_3;
2746 gfc_try gfc_check_assign (gfc_expr *, gfc_expr *, int);
2747 gfc_try gfc_check_pointer_assign (gfc_expr *, gfc_expr *);
2748 gfc_try gfc_check_assign_symbol (gfc_symbol *, gfc_expr *);
2749
2750 bool gfc_has_default_initializer (gfc_symbol *);
2751 gfc_expr *gfc_default_initializer (gfc_typespec *);
2752 gfc_expr *gfc_get_variable_expr (gfc_symtree *);
2753 gfc_expr * gfc_lval_expr_from_sym (gfc_symbol *);
2754
2755 gfc_array_spec *gfc_get_full_arrayspec_from_expr (gfc_expr *expr);
2756
2757 bool gfc_traverse_expr (gfc_expr *, gfc_symbol *,
2758                         bool (*)(gfc_expr *, gfc_symbol *, int*),
2759                         int);
2760 void gfc_expr_set_symbols_referenced (gfc_expr *);
2761 gfc_try gfc_expr_check_typed (gfc_expr*, gfc_namespace*, bool);
2762 void gfc_expr_replace_symbols (gfc_expr *, gfc_symbol *);
2763 void gfc_expr_replace_comp (gfc_expr *, gfc_component *);
2764
2765 bool gfc_is_proc_ptr_comp (gfc_expr *, gfc_component **);
2766
2767 bool gfc_ref_this_image (gfc_ref *ref);
2768 bool gfc_is_coindexed (gfc_expr *);
2769 bool gfc_is_coarray (gfc_expr *);
2770 int gfc_get_corank (gfc_expr *);
2771 bool gfc_has_ultimate_allocatable (gfc_expr *);
2772 bool gfc_has_ultimate_pointer (gfc_expr *);
2773
2774 gfc_expr* gfc_build_intrinsic_call (const char*, locus, unsigned, ...);
2775 gfc_try gfc_check_vardef_context (gfc_expr*, bool, bool, const char*);
2776
2777
2778 /* st.c */
2779 extern gfc_code new_st;
2780
2781 void gfc_clear_new_st (void);
2782 gfc_code *gfc_get_code (void);
2783 gfc_code *gfc_append_code (gfc_code *, gfc_code *);
2784 void gfc_free_statement (gfc_code *);
2785 void gfc_free_statements (gfc_code *);
2786 void gfc_free_association_list (gfc_association_list *);
2787
2788 /* resolve.c */
2789 gfc_try gfc_resolve_expr (gfc_expr *);
2790 void gfc_resolve (gfc_namespace *);
2791 void gfc_resolve_blocks (gfc_code *, gfc_namespace *);
2792 int gfc_impure_variable (gfc_symbol *);
2793 int gfc_pure (gfc_symbol *);
2794 int gfc_implicit_pure (gfc_symbol *);
2795 int gfc_elemental (gfc_symbol *);
2796 gfc_try gfc_resolve_iterator (gfc_iterator *, bool);
2797 gfc_try find_forall_index (gfc_expr *, gfc_symbol *, int);
2798 gfc_try gfc_resolve_index (gfc_expr *, int);
2799 gfc_try gfc_resolve_dim_arg (gfc_expr *);
2800 int gfc_is_formal_arg (void);
2801 void gfc_resolve_substring_charlen (gfc_expr *);
2802 match gfc_iso_c_sub_interface(gfc_code *, gfc_symbol *);
2803 gfc_expr *gfc_expr_to_initialize (gfc_expr *);
2804 bool gfc_type_is_extensible (gfc_symbol *sym);
2805
2806
2807 /* array.c */
2808 gfc_iterator *gfc_copy_iterator (gfc_iterator *);
2809
2810 void gfc_free_array_spec (gfc_array_spec *);
2811 gfc_array_ref *gfc_copy_array_ref (gfc_array_ref *);
2812
2813 gfc_try gfc_set_array_spec (gfc_symbol *, gfc_array_spec *, locus *);
2814 gfc_array_spec *gfc_copy_array_spec (gfc_array_spec *);
2815 gfc_try gfc_resolve_array_spec (gfc_array_spec *, int);
2816
2817 int gfc_compare_array_spec (gfc_array_spec *, gfc_array_spec *);
2818
2819 void gfc_simplify_iterator_var (gfc_expr *);
2820 gfc_try gfc_expand_constructor (gfc_expr *, bool);
2821 int gfc_constant_ac (gfc_expr *);
2822 int gfc_expanded_ac (gfc_expr *);
2823 gfc_try gfc_resolve_character_array_constructor (gfc_expr *);
2824 gfc_try gfc_resolve_array_constructor (gfc_expr *);
2825 gfc_try gfc_check_constructor_type (gfc_expr *);
2826 gfc_try gfc_check_iter_variable (gfc_expr *);
2827 gfc_try gfc_check_constructor (gfc_expr *, gfc_try (*)(gfc_expr *));
2828 gfc_try gfc_array_size (gfc_expr *, mpz_t *);
2829 gfc_try gfc_array_dimen_size (gfc_expr *, int, mpz_t *);
2830 gfc_try gfc_array_ref_shape (gfc_array_ref *, mpz_t *);
2831 gfc_array_ref *gfc_find_array_ref (gfc_expr *);
2832 tree gfc_conv_array_initializer (tree type, gfc_expr *);
2833 gfc_try spec_size (gfc_array_spec *, mpz_t *);
2834 gfc_try spec_dimen_size (gfc_array_spec *, int, mpz_t *);
2835 int gfc_is_compile_time_shape (gfc_array_spec *);
2836
2837 gfc_try gfc_ref_dimen_size (gfc_array_ref *, int dimen, mpz_t *, mpz_t *);
2838
2839
2840 /* interface.c -- FIXME: some of these should be in symbol.c */
2841 void gfc_free_interface (gfc_interface *);
2842 int gfc_compare_derived_types (gfc_symbol *, gfc_symbol *);
2843 int gfc_compare_types (gfc_typespec *, gfc_typespec *);
2844 int gfc_compare_interfaces (gfc_symbol*, gfc_symbol*, const char *, int, int,
2845                             char *, int, const char *, const char *);
2846 void gfc_check_interfaces (gfc_namespace *);
2847 void gfc_procedure_use (gfc_symbol *, gfc_actual_arglist **, locus *);
2848 void gfc_ppc_use (gfc_component *, gfc_actual_arglist **, locus *);
2849 gfc_symbol *gfc_search_interface (gfc_interface *, int,
2850                                   gfc_actual_arglist **);
2851 match gfc_extend_expr (gfc_expr *);
2852 void gfc_free_formal_arglist (gfc_formal_arglist *);
2853 gfc_try gfc_extend_assign (gfc_code *, gfc_namespace *);
2854 gfc_try gfc_check_new_interface (gfc_interface *, gfc_symbol *, locus);
2855 gfc_try gfc_add_interface (gfc_symbol *);
2856 gfc_interface *gfc_current_interface_head (void);
2857 void gfc_set_current_interface_head (gfc_interface *);
2858 gfc_symtree* gfc_find_sym_in_symtree (gfc_symbol*);
2859 bool gfc_arglist_matches_symbol (gfc_actual_arglist**, gfc_symbol*);
2860 bool gfc_check_operator_interface (gfc_symbol*, gfc_intrinsic_op, locus);
2861 int gfc_has_vector_subscript (gfc_expr*);
2862 gfc_intrinsic_op gfc_equivalent_op (gfc_intrinsic_op);
2863 gfc_try gfc_check_typebound_override (gfc_symtree*, gfc_symtree*);
2864
2865 /* io.c */
2866 extern gfc_st_label format_asterisk;
2867
2868 void gfc_free_open (gfc_open *);
2869 gfc_try gfc_resolve_open (gfc_open *);
2870 void gfc_free_close (gfc_close *);
2871 gfc_try gfc_resolve_close (gfc_close *);
2872 void gfc_free_filepos (gfc_filepos *);
2873 gfc_try gfc_resolve_filepos (gfc_filepos *);
2874 void gfc_free_inquire (gfc_inquire *);
2875 gfc_try gfc_resolve_inquire (gfc_inquire *);
2876 void gfc_free_dt (gfc_dt *);
2877 gfc_try gfc_resolve_dt (gfc_dt *, locus *);
2878 void gfc_free_wait (gfc_wait *);
2879 gfc_try gfc_resolve_wait (gfc_wait *);
2880
2881 /* module.c */
2882 void gfc_module_init_2 (void);
2883 void gfc_module_done_2 (void);
2884 void gfc_dump_module (const char *, int);
2885 bool gfc_check_symbol_access (gfc_symbol *);
2886 void gfc_free_use_stmts (gfc_use_list *);
2887
2888 /* primary.c */
2889 symbol_attribute gfc_variable_attr (gfc_expr *, gfc_typespec *);
2890 symbol_attribute gfc_expr_attr (gfc_expr *);
2891 match gfc_match_rvalue (gfc_expr **);
2892 match gfc_match_varspec (gfc_expr*, int, bool, bool);
2893 int gfc_check_digit (char, int);
2894 bool gfc_is_function_return_value (gfc_symbol *, gfc_namespace *);
2895 gfc_try gfc_convert_to_structure_constructor (gfc_expr *, gfc_symbol *,
2896                                               gfc_expr **,
2897                                               gfc_actual_arglist **, bool);
2898
2899 /* trans.c */
2900 void gfc_generate_code (gfc_namespace *);
2901 void gfc_generate_module_code (gfc_namespace *);
2902 void gfc_init_coarray_decl (bool);
2903
2904 /* trans-intrinsic.c */
2905 bool gfc_inline_intrinsic_function_p (gfc_expr *);
2906
2907 /* bbt.c */
2908 typedef int (*compare_fn) (void *, void *);
2909 void gfc_insert_bbt (void *, void *, compare_fn);
2910 void gfc_delete_bbt (void *, void *, compare_fn);
2911
2912 /* dump-parse-tree.c */
2913 void gfc_dump_parse_tree (gfc_namespace *, FILE *);
2914
2915 /* parse.c */
2916 gfc_try gfc_parse_file (void);
2917 void gfc_global_used (gfc_gsymbol *, locus *);
2918 gfc_namespace* gfc_build_block_ns (gfc_namespace *);
2919
2920 /* dependency.c */
2921 int gfc_dep_compare_functions (gfc_expr *, gfc_expr *, bool);
2922 int gfc_dep_compare_expr (gfc_expr *, gfc_expr *);
2923
2924 /* check.c */
2925 gfc_try gfc_check_same_strlen (const gfc_expr*, const gfc_expr*, const char*);
2926 gfc_try gfc_calculate_transfer_sizes (gfc_expr*, gfc_expr*, gfc_expr*,
2927                                       size_t*, size_t*, size_t*);
2928
2929 /* class.c */
2930 void gfc_fix_class_refs (gfc_expr *e);
2931 void gfc_add_component_ref (gfc_expr *, const char *);
2932 void gfc_add_class_array_ref (gfc_expr *);
2933 #define gfc_add_data_component(e)     gfc_add_component_ref(e,"_data")
2934 #define gfc_add_vptr_component(e)     gfc_add_component_ref(e,"_vptr")
2935 #define gfc_add_hash_component(e)     gfc_add_component_ref(e,"_hash")
2936 #define gfc_add_size_component(e)     gfc_add_component_ref(e,"_size")
2937 #define gfc_add_def_init_component(e) gfc_add_component_ref(e,"_def_init")
2938 bool gfc_is_class_array_ref (gfc_expr *, bool *);
2939 bool gfc_is_class_scalar_expr (gfc_expr *);
2940 bool gfc_is_class_container_ref (gfc_expr *e);
2941 gfc_expr *gfc_class_null_initializer (gfc_typespec *);
2942 unsigned int gfc_hash_value (gfc_symbol *);
2943 gfc_try gfc_build_class_symbol (gfc_typespec *, symbol_attribute *,
2944                                 gfc_array_spec **, bool);
2945 gfc_symbol *gfc_find_derived_vtab (gfc_symbol *);
2946 gfc_symtree* gfc_find_typebound_proc (gfc_symbol*, gfc_try*,
2947                                       const char*, bool, locus*);
2948 gfc_symtree* gfc_find_typebound_user_op (gfc_symbol*, gfc_try*,
2949                                          const char*, bool, locus*);
2950 gfc_typebound_proc* gfc_find_typebound_intrinsic_op (gfc_symbol*, gfc_try*,
2951                                                      gfc_intrinsic_op, bool,
2952                                                      locus*);
2953 gfc_symtree* gfc_get_tbp_symtree (gfc_symtree**, const char*);
2954
2955 #define CLASS_DATA(sym) sym->ts.u.derived->components
2956
2957 /* frontend-passes.c */
2958
2959 void gfc_run_passes (gfc_namespace *);
2960
2961 typedef int (*walk_code_fn_t) (gfc_code **, int *, void *);
2962 typedef int (*walk_expr_fn_t) (gfc_expr **, int *, void *);
2963
2964 int gfc_expr_walker (gfc_expr **, walk_expr_fn_t, void *);
2965 int gfc_code_walker (gfc_code **, walk_code_fn_t, walk_expr_fn_t, void *);
2966
2967 #endif /* GCC_GFORTRAN_H  */