gcc/fortran/gfortran.h

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