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   1 /*
   2  * This file is part of cparser.
   3  * Copyright (C) 2007-2008 Matthias Braun <matze@braunis.de>
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License
   7  * as published by the Free Software Foundation; either version 2
   8  * of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  18  * 02111-1307, USA.
  19  */
  20 #ifndef AST_T_H
  21 #define AST_T_H
  22
  23 #include <libfirm/firm_types.h>
  24 #include <assert.h>
  25
  26 #include "ast.h"
  27 #include "symbol.h"
  28 #include "token_t.h"
  29 #include "type.h"
  30 #include "adt/obst.h"
  31
  32 /** The AST obstack contains all data that must stay in the AST. */
  33 extern struct obstack ast_obstack;
  34
  35 /**
  36  * Operator precedence classes
  37  */
  38 typedef enum precedence_t {
  39         PREC_BOTTOM,
  40         PREC_EXPRESSION,     /* ,                                  left to right */
  41         PREC_ASSIGNMENT,     /* = += -= *= /= %= <<= >>= &= ^= |=  right to left */
  42         PREC_CONDITIONAL,    /* ?:                                 right to left */
  43         PREC_LOGICAL_OR,     /* ||                                 left to right */
  44         PREC_LOGICAL_AND,    /* &&                                 left to right */
  45         PREC_OR,             /* |                                  left to right */
  46         PREC_XOR,            /* ^                                  left to right */
  47         PREC_AND,            /* &                                  left to right */
  48         PREC_EQUALITY,       /* == !=                              left to right */
  49         PREC_RELATIONAL,     /* < <= > >=                          left to right */
  50         PREC_SHIFT,          /* << >>                              left to right */
  51         PREC_ADDITIVE,       /* + -                                left to right */
  52         PREC_MULTIPLICATIVE, /* * / %                              left to right */
  53         PREC_CAST,           /* (type)                             right to left */
  54         PREC_UNARY,          /* ! ~ ++ -- + - * & sizeof           right to left */
  55         PREC_POSTFIX,        /* () [] -> .                         left to right */
  56         PREC_PRIMARY,
  57         PREC_TOP
  58 } precedence_t;
  59
  60 /**
  61  * Expression kinds.
  62  */
  63 typedef enum expression_kind_t {
  64         EXPR_UNKNOWN = 0,
  65         EXPR_INVALID,
  66         EXPR_REFERENCE,
  67         EXPR_CONST,
  68         EXPR_CHARACTER_CONSTANT,
  69         EXPR_WIDE_CHARACTER_CONSTANT,
  70         EXPR_STRING_LITERAL,
  71         EXPR_WIDE_STRING_LITERAL,
  72         EXPR_COMPOUND_LITERAL,
  73         EXPR_CALL,
  74         EXPR_CONDITIONAL,
  75         EXPR_SELECT,
  76         EXPR_ARRAY_ACCESS,
  77         EXPR_SIZEOF,
  78         EXPR_CLASSIFY_TYPE,
  79         EXPR_ALIGNOF,
  80
  81         EXPR_FUNCNAME,
  82         EXPR_BUILTIN_SYMBOL,
  83         EXPR_BUILTIN_CONSTANT_P,
  84         EXPR_BUILTIN_PREFETCH,
  85         EXPR_OFFSETOF,
  86         EXPR_VA_START,
  87         EXPR_VA_ARG,
  88         EXPR_STATEMENT,
  89         EXPR_LABEL_ADDRESS, /**< GCC extension &&label operator */
  90
  91         EXPR_UNARY_FIRST,
  92         EXPR_UNARY_NEGATE = EXPR_UNARY_FIRST,
  93         EXPR_UNARY_PLUS,
  94         EXPR_UNARY_BITWISE_NEGATE,
  95         EXPR_UNARY_NOT,
  96         EXPR_UNARY_DEREFERENCE,
  97         EXPR_UNARY_TAKE_ADDRESS,
  98         EXPR_UNARY_POSTFIX_INCREMENT,
  99         EXPR_UNARY_POSTFIX_DECREMENT,
 100         EXPR_UNARY_PREFIX_INCREMENT,
 101         EXPR_UNARY_PREFIX_DECREMENT,
 102         EXPR_UNARY_CAST,
 103         EXPR_UNARY_CAST_IMPLICIT, /**< compiler generated cast */
 104         EXPR_UNARY_ASSUME,        /**< MS __assume() */
 105         EXPR_UNARY_DELETE,
 106         EXPR_UNARY_DELETE_ARRAY,
 107         EXPR_UNARY_THROW,
 108         EXPR_UNARY_LAST = EXPR_UNARY_THROW,
 109
 110         EXPR_BINARY_FIRST,
 111         EXPR_BINARY_ADD = EXPR_BINARY_FIRST,
 112         EXPR_BINARY_SUB,
 113         EXPR_BINARY_MUL,
 114         EXPR_BINARY_DIV,
 115         EXPR_BINARY_MOD,
 116         EXPR_BINARY_EQUAL,
 117         EXPR_BINARY_NOTEQUAL,
 118         EXPR_BINARY_LESS,
 119         EXPR_BINARY_LESSEQUAL,
 120         EXPR_BINARY_GREATER,
 121         EXPR_BINARY_GREATEREQUAL,
 122         EXPR_BINARY_BITWISE_AND,
 123         EXPR_BINARY_BITWISE_OR,
 124         EXPR_BINARY_BITWISE_XOR,
 125         EXPR_BINARY_LOGICAL_AND,
 126         EXPR_BINARY_LOGICAL_OR,
 127         EXPR_BINARY_SHIFTLEFT,
 128         EXPR_BINARY_SHIFTRIGHT,
 129         EXPR_BINARY_ASSIGN,
 130         EXPR_BINARY_MUL_ASSIGN,
 131         EXPR_BINARY_DIV_ASSIGN,
 132         EXPR_BINARY_MOD_ASSIGN,
 133         EXPR_BINARY_ADD_ASSIGN,
 134         EXPR_BINARY_SUB_ASSIGN,
 135         EXPR_BINARY_SHIFTLEFT_ASSIGN,
 136         EXPR_BINARY_SHIFTRIGHT_ASSIGN,
 137         EXPR_BINARY_BITWISE_AND_ASSIGN,
 138         EXPR_BINARY_BITWISE_XOR_ASSIGN,
 139         EXPR_BINARY_BITWISE_OR_ASSIGN,
 140         EXPR_BINARY_COMMA,
 141
 142         EXPR_BINARY_BUILTIN_EXPECT,
 143         EXPR_BINARY_ISGREATER,
 144         EXPR_BINARY_ISGREATEREQUAL,
 145         EXPR_BINARY_ISLESS,
 146         EXPR_BINARY_ISLESSEQUAL,
 147         EXPR_BINARY_ISLESSGREATER,
 148         EXPR_BINARY_ISUNORDERED,
 149         EXPR_BINARY_LAST = EXPR_BINARY_ISUNORDERED,
 150 } expression_kind_t;
 151
 152 typedef enum funcname_kind_t {
 153         FUNCNAME_FUNCTION,           /**< C99 __func__, older __FUNCTION__ */
 154         FUNCNAME_PRETTY_FUNCTION,    /**< GNUC __PRETTY_FUNCTION__ */
 155         FUNCNAME_FUNCSIG,            /**< MS __FUNCSIG__ */
 156         FUNCNAME_FUNCDNAME           /**< MS __FUNCDNAME__ */
 157 } funcname_kind_t;
 158
 159 /* convenience macros */
 160 #define EXPR_BINARY_CASES                  \
 161         case EXPR_BINARY_ADD:                  \
 162         case EXPR_BINARY_SUB:                  \
 163         case EXPR_BINARY_MUL:                  \
 164         case EXPR_BINARY_DIV:                  \
 165         case EXPR_BINARY_MOD:                  \
 166         case EXPR_BINARY_EQUAL:                \
 167         case EXPR_BINARY_NOTEQUAL:             \
 168         case EXPR_BINARY_LESS:                 \
 169         case EXPR_BINARY_LESSEQUAL:            \
 170         case EXPR_BINARY_GREATER:              \
 171         case EXPR_BINARY_GREATEREQUAL:         \
 172         case EXPR_BINARY_BITWISE_AND:          \
 173         case EXPR_BINARY_BITWISE_OR:           \
 174         case EXPR_BINARY_BITWISE_XOR:          \
 175         case EXPR_BINARY_LOGICAL_AND:          \
 176         case EXPR_BINARY_LOGICAL_OR:           \
 177         case EXPR_BINARY_SHIFTLEFT:            \
 178         case EXPR_BINARY_SHIFTRIGHT:           \
 179         case EXPR_BINARY_ASSIGN:               \
 180         case EXPR_BINARY_MUL_ASSIGN:           \
 181         case EXPR_BINARY_DIV_ASSIGN:           \
 182         case EXPR_BINARY_MOD_ASSIGN:           \
 183         case EXPR_BINARY_ADD_ASSIGN:           \
 184         case EXPR_BINARY_SUB_ASSIGN:           \
 185         case EXPR_BINARY_SHIFTLEFT_ASSIGN:     \
 186         case EXPR_BINARY_SHIFTRIGHT_ASSIGN:    \
 187         case EXPR_BINARY_BITWISE_AND_ASSIGN:   \
 188         case EXPR_BINARY_BITWISE_XOR_ASSIGN:   \
 189         case EXPR_BINARY_BITWISE_OR_ASSIGN:    \
 190         case EXPR_BINARY_COMMA:                \
 191         case EXPR_BINARY_BUILTIN_EXPECT:       \
 192         case EXPR_BINARY_ISGREATER:            \
 193         case EXPR_BINARY_ISGREATEREQUAL:       \
 194         case EXPR_BINARY_ISLESS:               \
 195         case EXPR_BINARY_ISLESSEQUAL:          \
 196         case EXPR_BINARY_ISLESSGREATER:        \
 197         case EXPR_BINARY_ISUNORDERED:
 198
 199 /**
 200  * unary expression with mandatory operand
 201  */
 202 #define EXPR_UNARY_CASES_MANDATORY         \
 203         case EXPR_UNARY_NEGATE:                \
 204         case EXPR_UNARY_PLUS:                  \
 205         case EXPR_UNARY_BITWISE_NEGATE:        \
 206         case EXPR_UNARY_NOT:                   \
 207         case EXPR_UNARY_DEREFERENCE:           \
 208         case EXPR_UNARY_TAKE_ADDRESS:          \
 209         case EXPR_UNARY_POSTFIX_INCREMENT:     \
 210         case EXPR_UNARY_POSTFIX_DECREMENT:     \
 211         case EXPR_UNARY_PREFIX_INCREMENT:      \
 212         case EXPR_UNARY_PREFIX_DECREMENT:      \
 213         case EXPR_UNARY_CAST:                  \
 214         case EXPR_UNARY_CAST_IMPLICIT:         \
 215         case EXPR_UNARY_ASSUME:                \
 216         case EXPR_UNARY_DELETE:                \
 217         case EXPR_UNARY_DELETE_ARRAY:
 218
 219 /**
 220  * unary expression with optinal operand
 221  */
 222 #define EXPR_UNARY_CASES_OPTIONAL \
 223         case EXPR_UNARY_THROW:        \
 224
 225 #define EXPR_UNARY_CASES       \
 226         EXPR_UNARY_CASES_MANDATORY \
 227         EXPR_UNARY_CASES_OPTIONAL
 228
 229 /**
 230  * A scope containing declarations.
 231  */
 232 struct scope_t {
 233         declaration_t *declarations;      /**< List of declarations in this scope. */
 234         declaration_t *last_declaration;  /**< last declaration in this scope. */
 235         scope_t       *parent;            /**< points to the parent scope. */
 236         unsigned      depth;              /**< while parsing, the depth of this scope in the scope stack. */
 237 };
 238
 239 struct expression_base_t {
 240         expression_kind_t   kind;
 241         type_t             *type;
 242         source_position_t   source_position;
 243 #ifndef NDEBUG
 244         bool                transformed;
 245 #endif
 246 };
 247
 248 struct const_expression_t {
 249         expression_base_t  base;
 250         union {
 251                 long long      int_value;
 252                 long double    float_value;
 253                 string_t       character;
 254                 wide_string_t  wide_character;
 255         } v;
 256         bool               is_ms_noop;  /**< True, if this constant is the result
 257                                              of an microsoft __noop operator */
 258 };
 259
 260 struct string_literal_expression_t {
 261         expression_base_t  base;
 262         string_t           value;
 263 };
 264
 265 struct funcname_expression_t {
 266         expression_base_t  base;
 267         funcname_kind_t    kind;
 268         string_t           value;     /**< the value once assigned. */
 269 };
 270
 271 struct wide_string_literal_expression_t {
 272         expression_base_t  base;
 273         wide_string_t      value;
 274 };
 275
 276 struct compound_literal_expression_t {
 277         expression_base_t  base;
 278         type_t            *type;
 279         initializer_t     *initializer;
 280 };
 281
 282 struct builtin_symbol_expression_t {
 283         expression_base_t  base;
 284         symbol_t          *symbol;
 285 };
 286
 287 struct builtin_constant_expression_t {
 288         expression_base_t  base;
 289         expression_t      *value;
 290 };
 291
 292 struct builtin_prefetch_expression_t {
 293         expression_base_t  base;
 294         expression_t      *adr;
 295         expression_t      *rw;
 296         expression_t      *locality;
 297 };
 298
 299 struct reference_expression_t {
 300         expression_base_t  base;
 301         declaration_t     *declaration;
 302 };
 303
 304 struct call_argument_t {
 305         expression_t    *expression;
 306         call_argument_t *next;
 307 };
 308
 309 struct call_expression_t {
 310         expression_base_t  base;
 311         expression_t      *function;
 312         call_argument_t   *arguments;
 313 };
 314
 315 struct unary_expression_t {
 316         expression_base_t  base;
 317         expression_t      *value;
 318 };
 319
 320 struct binary_expression_t {
 321         expression_base_t  base;
 322         expression_t      *left;
 323         expression_t      *right;
 324 };
 325
 326 struct select_expression_t {
 327         expression_base_t  base;
 328         expression_t      *compound;
 329         declaration_t     *compound_entry;
 330 };
 331
 332 struct array_access_expression_t {
 333         expression_base_t  base;
 334         expression_t      *array_ref;
 335         expression_t      *index;
 336         bool               flipped; /**< index/ref was written in a 5[a] way */
 337 };
 338
 339 struct typeprop_expression_t {
 340         expression_base_t  base;
 341         type_t            *type;
 342         expression_t      *tp_expression;
 343 };
 344
 345 struct designator_t {
 346         source_position_t  source_position;
 347         symbol_t          *symbol;
 348         expression_t      *array_index;
 349         designator_t      *next;
 350 };
 351
 352 struct offsetof_expression_t {
 353         expression_base_t  base;
 354         type_t            *type;
 355         designator_t      *designator;
 356 };
 357
 358 struct va_start_expression_t {
 359         expression_base_t  base;
 360         expression_t      *ap;
 361         declaration_t     *parameter;
 362 };
 363
 364 struct va_arg_expression_t {
 365         expression_base_t  base;
 366         expression_t      *ap;
 367 };
 368
 369 struct conditional_expression_t {
 370         expression_base_t  base;
 371         expression_t      *condition;
 372         expression_t      *true_expression;
 373         expression_t      *false_expression;
 374 };
 375
 376 struct statement_expression_t {
 377         expression_base_t  base;
 378         statement_t       *statement;
 379 };
 380
 381 struct classify_type_expression_t {
 382         expression_base_t  base;
 383         expression_t      *type_expression;
 384 };
 385
 386 struct label_address_expression_t {
 387         expression_base_t  base;
 388         declaration_t     *declaration;
 389 };
 390
 391 union expression_t {
 392         expression_kind_t                kind;
 393         expression_base_t                base;
 394         const_expression_t               conste;
 395         funcname_expression_t            funcname;
 396         string_literal_expression_t      string;
 397         wide_string_literal_expression_t wide_string;
 398         compound_literal_expression_t    compound_literal;
 399         builtin_symbol_expression_t      builtin_symbol;
 400         builtin_constant_expression_t    builtin_constant;
 401         builtin_prefetch_expression_t    builtin_prefetch;
 402         reference_expression_t           reference;
 403         call_expression_t                call;
 404         unary_expression_t               unary;
 405         binary_expression_t              binary;
 406         select_expression_t              select;
 407         array_access_expression_t        array_access;
 408         typeprop_expression_t            typeprop;
 409         offsetof_expression_t            offsetofe;
 410         va_start_expression_t            va_starte;
 411         va_arg_expression_t              va_arge;
 412         conditional_expression_t         conditional;
 413         statement_expression_t           statement;
 414         classify_type_expression_t       classify_type;
 415         label_address_expression_t       label_address;
 416 };
 417
 418 typedef enum storage_class_tag_t {
 419         STORAGE_CLASS_NONE,
 420         STORAGE_CLASS_EXTERN,
 421         STORAGE_CLASS_STATIC,
 422         STORAGE_CLASS_TYPEDEF,
 423         STORAGE_CLASS_AUTO,
 424         STORAGE_CLASS_REGISTER,
 425         STORAGE_CLASS_ENUM_ENTRY,
 426         STORAGE_CLASS_THREAD,
 427         STORAGE_CLASS_THREAD_EXTERN,
 428         STORAGE_CLASS_THREAD_STATIC,
 429 } storage_class_tag_t;
 430
 431 typedef enum namespace_t {
 432         NAMESPACE_NORMAL,
 433         NAMESPACE_STRUCT,
 434         NAMESPACE_UNION,
 435         NAMESPACE_ENUM,
 436         NAMESPACE_LABEL,
 437         NAMESPACE_LOCAL_LABEL
 438 } namespace_t;
 439
 440 typedef enum initializer_kind_t {
 441         INITIALIZER_VALUE,
 442         INITIALIZER_LIST,
 443         INITIALIZER_STRING,
 444         INITIALIZER_WIDE_STRING,
 445         INITIALIZER_DESIGNATOR
 446 } initializer_kind_t;
 447
 448 struct initializer_base_t {
 449         initializer_kind_t kind;
 450 };
 451
 452 struct initializer_value_t {
 453         initializer_base_t  base;
 454         expression_t       *value;
 455 };
 456
 457 struct initializer_list_t {
 458         initializer_base_t  base;
 459         size_t              len;
 460         initializer_t      *initializers[];
 461 };
 462
 463 struct initializer_string_t {
 464         initializer_base_t base;
 465         string_t           string;
 466 };
 467
 468 struct initializer_wide_string_t {
 469         initializer_base_t  base;
 470         wide_string_t       string;
 471 };
 472
 473 struct initializer_designator_t {
 474         initializer_base_t  base;
 475         designator_t       *designator;
 476 };
 477
 478 union initializer_t {
 479         initializer_kind_t        kind;
 480         initializer_base_t        base;
 481         initializer_value_t       value;
 482         initializer_list_t        list;
 483         initializer_string_t      string;
 484         initializer_wide_string_t wide_string;
 485         initializer_designator_t  designator;
 486 };
 487
 488 /**
 489  * GNU attributes.
 490  */
 491 typedef enum gnu_attribute_kind_t {
 492         GNU_AK_CONST,
 493         GNU_AK_VOLATILE,
 494         GNU_AK_CDECL,
 495         GNU_AK_STDCALL,
 496         GNU_AK_FASTCALL,
 497         GNU_AK_DEPRECATED,
 498         GNU_AK_NOINLINE,
 499         GNU_AK_NORETURN,
 500         GNU_AK_NAKED,
 501         GNU_AK_PURE,
 502         GNU_AK_ALWAYS_INLINE,
 503         GNU_AK_MALLOC,
 504         GNU_AK_WEAK,
 505         GNU_AK_CONSTRUCTOR,
 506         GNU_AK_DESTRUCTOR,
 507         GNU_AK_NOTHROW,
 508         GNU_AK_TRANSPARENT_UNION,
 509         GNU_AK_COMMON,
 510         GNU_AK_NOCOMMON,
 511         GNU_AK_PACKED,
 512         GNU_AK_SHARED,
 513         GNU_AK_NOTSHARED,
 514         GNU_AK_USED,
 515         GNU_AK_UNUSED,
 516         GNU_AK_NO_INSTRUMENT_FUNCTION,
 517         GNU_AK_WARN_UNUSED_RESULT,
 518         GNU_AK_LONGCALL,
 519         GNU_AK_SHORTCALL,
 520         GNU_AK_LONG_CALL,
 521         GNU_AK_SHORT_CALL,
 522         GNU_AK_FUNCTION_VECTOR,
 523         GNU_AK_INTERRUPT,
 524         GNU_AK_INTERRUPT_HANDLER,
 525         GNU_AK_NMI_HANDLER,
 526         GNU_AK_NESTING,
 527         GNU_AK_NEAR,
 528         GNU_AK_FAR,
 529         GNU_AK_SIGNAL,
 530         GNU_AK_EIGTHBIT_DATA,
 531         GNU_AK_TINY_DATA,
 532         GNU_AK_SAVEALL,
 533         GNU_AK_FLATTEN,
 534         GNU_AK_SSEREGPARM,
 535         GNU_AK_EXTERNALLY_VISIBLE,
 536         GNU_AK_RETURN_TWICE,
 537         GNU_AK_MAY_ALIAS,
 538         GNU_AK_MS_STRUCT,
 539         GNU_AK_GCC_STRUCT,
 540         GNU_AK_DLLIMPORT,
 541         GNU_AK_DLLEXPORT,
 542         GNU_AK_ALIGNED,
 543         GNU_AK_ALIAS,
 544         GNU_AK_SECTION,
 545         GNU_AK_FORMAT,
 546         GNU_AK_FORMAT_ARG,
 547         GNU_AK_WEAKREF,
 548         GNU_AK_NONNULL,
 549         GNU_AK_TLS_MODEL,
 550         GNU_AK_VISIBILITY,
 551         GNU_AK_REGPARM,
 552         GNU_AK_MODEL,
 553         GNU_AK_MODE,
 554         GNU_AK_TRAP_EXIT,
 555         GNU_AK_SP_SWITCH,
 556         GNU_AK_SENTINEL,
 557         GNU_AK_LAST
 558 } gnu_attribute_kind_t;
 559
 560 /**
 561  * Extended microsoft modifier.
 562  */
 563 typedef enum decl_modifier_t {
 564         DM_DLLIMPORT         = 1 <<  0,
 565         DM_DLLEXPORT         = 1 <<  1,
 566         DM_THREAD            = 1 <<  2,
 567         DM_NAKED             = 1 <<  3,
 568         DM_MICROSOFT_INLINE  = 1 <<  4,
 569         DM_FORCEINLINE       = 1 <<  5,
 570         DM_SELECTANY         = 1 <<  6,
 571         DM_NOTHROW           = 1 <<  7,
 572         DM_NOVTABLE          = 1 <<  8,
 573         DM_NORETURN          = 1 <<  9,
 574         DM_NOINLINE          = 1 << 10,
 575         DM_RESTRICT          = 1 << 11,
 576         DM_NOALIAS           = 1 << 12,
 577         DM_PACKED            = 1 << 13,
 578         DM_TRANSPARENT_UNION = 1 << 14,
 579         DM_CONST             = 1 << 15,
 580         DM_PURE              = 1 << 16,
 581         DM_CONSTRUCTOR       = 1 << 17,
 582         DM_DESTRUCTOR        = 1 << 18,
 583         DM_UNUSED            = 1 << 19,
 584         DM_USED              = 1 << 20,
 585         DM_CDECL             = 1 << 21,
 586         DM_FASTCALL          = 1 << 22,
 587         DM_STDCALL           = 1 << 23,
 588         DM_THISCALL          = 1 << 24,
 589         DM_DEPRECATED        = 1 << 25
 590 } decl_modifier_t;
 591
 592 typedef unsigned decl_modifiers_t;
 593
 594 struct declaration_t {
 595         unsigned char       namespc;
 596         unsigned char       declared_storage_class;
 597         unsigned char       storage_class;
 598         unsigned char       alignment;          /**< Alignment of the declaration, 0 for default. */
 599         decl_modifiers_t    modifiers;          /**< modifiers. */
 600         const char         *deprecated_string;  /**< MS deprecated string if any. */
 601         symbol_t           *get_property_sym;   /**< MS get property. */
 602         symbol_t           *put_property_sym;   /**< MS put property. */
 603         unsigned int        address_taken : 1;  /**< Set if the address of this declaration was taken. */
 604         unsigned int        is_inline     : 1;
 605         unsigned int        used          : 1;  /**< Set if the declaration is used. */
 606         unsigned int        read          : 1;
 607         unsigned int        implicit      : 1;  /**< Set for implicit (not found in source code) declarations. */
 608         unsigned int        need_closure  : 1;  /**< Inner function needs closure. */
 609         unsigned int        goto_to_outer : 1;  /**< Inner function has goto to outer function. */
 610         type_t             *type;
 611         il_size_t           offset;             /**< The offset of this member inside a compound. */
 612         symbol_t           *symbol;
 613         source_position_t   source_position;
 614         union {
 615                 bool            complete;           /**< used to indicate whether struct/union types are already defined or if just the name is declared */
 616                 statement_t    *statement;
 617                 initializer_t  *initializer;
 618                 expression_t   *enum_value;
 619         } init;
 620         scope_t             scope;              /**< The scope that this declaration opens. */
 621         scope_t            *parent_scope;       /**< The parent scope where this declaration lives. */
 622
 623         /** next declaration in a scope */
 624         declaration_t      *next;
 625         /** next declaration with same symbol */
 626         declaration_t      *symbol_next;
 627
 628         /* the following fields are used in ast2firm module */
 629         unsigned char       declaration_kind;
 630         union {
 631                 unsigned int  value_number;
 632                 ir_entity    *entity;
 633                 ir_node      *block;
 634                 ir_node      *vla_base;
 635                 tarval       *enum_val;
 636                 ir_type      *irtype;
 637         } v;
 638 };
 639
 640 typedef enum statement_kind_t {
 641         STATEMENT_INVALID,
 642         STATEMENT_EMPTY,
 643         STATEMENT_COMPOUND,
 644         STATEMENT_RETURN,
 645         STATEMENT_DECLARATION,
 646         STATEMENT_IF,
 647         STATEMENT_SWITCH,
 648         STATEMENT_EXPRESSION,
 649         STATEMENT_CONTINUE,
 650         STATEMENT_BREAK,
 651         STATEMENT_GOTO,
 652         STATEMENT_LABEL,
 653         STATEMENT_CASE_LABEL,
 654         STATEMENT_WHILE,
 655         STATEMENT_DO_WHILE,
 656         STATEMENT_FOR,
 657         STATEMENT_ASM,
 658         STATEMENT_MS_TRY,          /**< MS __try/__finally or __try/__except */
 659         STATEMENT_LEAVE            /**< MS __leave */
 660 } statement_kind_t;
 661
 662 struct statement_base_t {
 663         statement_kind_t   kind;
 664         statement_t       *next;
 665         source_position_t  source_position;
 666         statement_t       *parent;
 667         bool               reachable;
 668 #ifndef NDEBUG
 669         bool               transformed;
 670 #endif
 671 };
 672
 673 struct invalid_statement_t {
 674         statement_base_t  base;
 675 };
 676
 677 struct empty_statement_t {
 678         statement_base_t  base;
 679 };
 680
 681 struct return_statement_t {
 682         statement_base_t  base;
 683         expression_t     *value;
 684 };
 685
 686 struct compound_statement_t {
 687         statement_base_t  base;
 688         statement_t      *statements;
 689         scope_t           scope;
 690 };
 691
 692 struct declaration_statement_t {
 693         statement_base_t  base;
 694         declaration_t    *declarations_begin;
 695         declaration_t    *declarations_end;
 696 };
 697
 698 struct if_statement_t {
 699         statement_base_t  base;
 700         expression_t     *condition;
 701         statement_t      *true_statement;
 702         statement_t      *false_statement;
 703 };
 704
 705 struct switch_statement_t {
 706         statement_base_t        base;
 707         expression_t           *expression;
 708         statement_t            *body;
 709         case_label_statement_t *first_case, *last_case;  /**< List of all cases, including default. */
 710         case_label_statement_t *default_label;           /**< The default label if existent. */
 711         unsigned long           default_proj_nr;         /**< The Proj-number for the default Proj. */
 712 };
 713
 714 struct goto_statement_t {
 715         statement_base_t  base;
 716         declaration_t    *label;         /**< The destination label. */
 717         expression_t     *expression;    /**< The expression for an assigned goto. */
 718         goto_statement_t *next;          /**< links all goto statements of a function */
 719 };
 720
 721 struct case_label_statement_t {
 722         statement_base_t        base;
 723         expression_t           *expression;    /**< The case label expression, NULL for default label. */
 724         expression_t           *end_range;     /**< For GNUC case a .. b: the end range expression, NULL else. */
 725         case_label_statement_t *next;          /**< link to the next case label in switch */
 726         statement_t            *statement;
 727         long                   first_case;     /**< The folded value of expression. */
 728         long                   last_case;      /**< The folded value of end_range. */
 729         bool                   is_bad;         /**< If set marked as bad to suppress warnings. */
 730         bool                   is_empty_range; /**< If set marked this as an empty range. */
 731 };
 732
 733 struct label_statement_t {
 734         statement_base_t   base;
 735         declaration_t     *label;
 736         statement_t       *statement;
 737         label_statement_t *next;    /**< links all label statements of a function */
 738 };
 739
 740 struct expression_statement_t {
 741         statement_base_t  base;
 742         expression_t     *expression;
 743 };
 744
 745 struct while_statement_t {
 746         statement_base_t  base;
 747         expression_t     *condition;
 748         statement_t      *body;
 749 };
 750
 751 struct do_while_statement_t {
 752         statement_base_t  base;
 753         expression_t     *condition;
 754         statement_t      *body;
 755 };
 756
 757 struct for_statement_t {
 758         statement_base_t  base;
 759         expression_t     *initialisation;
 760         expression_t     *condition;
 761         expression_t     *step;
 762         statement_t      *body;
 763         scope_t           scope;
 764         bool              condition_reachable:1;
 765         bool              step_reachable:1;
 766 };
 767
 768 struct asm_argument_t {
 769         string_t        constraints;
 770         expression_t   *expression;
 771         symbol_t       *symbol;
 772         asm_argument_t *next;
 773 };
 774
 775 struct asm_clobber_t {
 776         string_t       clobber;
 777         asm_clobber_t *next;
 778 };
 779
 780 struct asm_statement_t {
 781         statement_base_t base;
 782         string_t         asm_text;
 783         asm_argument_t  *inputs;
 784         asm_argument_t  *outputs;
 785         asm_clobber_t   *clobbers;
 786         bool             is_volatile;
 787 };
 788
 789 struct ms_try_statement_t {
 790         statement_base_t  base;
 791         statement_t      *try_statement;
 792         expression_t     *except_expression; /**< non-null for except, NULL for finally */
 793         statement_t      *final_statement;
 794 };
 795
 796 struct leave_statement_t {
 797         statement_base_t  base;
 798 };
 799
 800 union statement_t {
 801         statement_kind_t         kind;
 802         statement_base_t         base;
 803         return_statement_t       returns;
 804         compound_statement_t     compound;
 805         declaration_statement_t  declaration;
 806         if_statement_t           ifs;
 807         switch_statement_t       switchs;
 808         goto_statement_t         gotos;
 809         case_label_statement_t   case_label;
 810         label_statement_t        label;
 811         expression_statement_t   expression;
 812         while_statement_t        whiles;
 813         do_while_statement_t     do_while;
 814         for_statement_t          fors;
 815         asm_statement_t          asms;
 816         ms_try_statement_t       ms_try;
 817         leave_statement_t        leave;
 818 };
 819
 820 struct translation_unit_t {
 821         scope_t      scope;
 822         statement_t *global_asm;
 823 };
 824
 825 static inline
 826 void *_allocate_ast(size_t size)
 827 {
 828         return obstack_alloc(&ast_obstack, size);
 829 }
 830
 831 static inline
 832 bool is_invalid_expression(expression_t *expression)
 833 {
 834         return expression->base.kind == EXPR_INVALID;
 835 }
 836
 837 static inline
 838 bool is_invalid_statement(statement_t *statement)
 839 {
 840         return statement->base.kind == STATEMENT_INVALID;
 841 }
 842
 843
 844 #define allocate_ast(size)                 _allocate_ast(size)
 845
 846 #endif