2 * This file is part of cparser.
3 * Copyright (C) 2007-2009 Matthias Braun <matze@braunis.de>
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.
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.
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
23 #include <libfirm/firm_types.h>
33 /** The AST obstack contains all data that must stay in the AST. */
34 extern struct obstack ast_obstack;
37 * Operator precedence classes
39 typedef enum precedence_t {
41 PREC_EXPRESSION, /* , left to right */
42 PREC_ASSIGNMENT, /* = += -= *= /= %= <<= >>= &= ^= |= right to left */
43 PREC_CONDITIONAL, /* ?: right to left */
44 PREC_LOGICAL_OR, /* || left to right */
45 PREC_LOGICAL_AND, /* && left to right */
46 PREC_OR, /* | left to right */
47 PREC_XOR, /* ^ left to right */
48 PREC_AND, /* & left to right */
49 PREC_EQUALITY, /* == != left to right */
50 PREC_RELATIONAL, /* < <= > >= left to right */
51 PREC_SHIFT, /* << >> left to right */
52 PREC_ADDITIVE, /* + - left to right */
53 PREC_MULTIPLICATIVE, /* * / % left to right */
54 PREC_CAST, /* (type) right to left */
55 PREC_UNARY, /* ! ~ ++ -- + - * & sizeof right to left */
56 PREC_POSTFIX, /* () [] -> . left to right */
64 typedef enum expression_kind_t {
70 EXPR_LITERAL_FLOATINGPOINT,
71 EXPR_LITERAL_CHARACTER,
72 EXPR_LITERAL_MS_NOOP, /**< MS __noop extension */
74 EXPR_COMPOUND_LITERAL,
84 EXPR_BUILTIN_CONSTANT_P,
85 EXPR_BUILTIN_TYPES_COMPATIBLE_P,
91 EXPR_LABEL_ADDRESS, /**< GCC extension &&label operator */
94 EXPR_UNARY_NEGATE = EXPR_UNARY_FIRST,
96 EXPR_UNARY_COMPLEMENT,
98 EXPR_UNARY_DEREFERENCE,
99 EXPR_UNARY_TAKE_ADDRESS,
100 EXPR_UNARY_POSTFIX_INCREMENT,
101 EXPR_UNARY_POSTFIX_DECREMENT,
102 EXPR_UNARY_PREFIX_INCREMENT,
103 EXPR_UNARY_PREFIX_DECREMENT,
105 EXPR_UNARY_ASSUME, /**< MS __assume() */
107 EXPR_UNARY_DELETE_ARRAY,
109 EXPR_UNARY_LAST = EXPR_UNARY_THROW,
112 EXPR_BINARY_ADD = EXPR_BINARY_FIRST,
118 EXPR_BINARY_NOTEQUAL,
120 EXPR_BINARY_LESSEQUAL,
122 EXPR_BINARY_GREATEREQUAL,
123 EXPR_BINARY_BITWISE_AND,
124 EXPR_BINARY_BITWISE_OR,
125 EXPR_BINARY_BITWISE_XOR,
126 EXPR_BINARY_LOGICAL_AND,
127 EXPR_BINARY_LOGICAL_OR,
128 EXPR_BINARY_SHIFTLEFT,
129 EXPR_BINARY_SHIFTRIGHT,
131 EXPR_BINARY_MUL_ASSIGN,
132 EXPR_BINARY_DIV_ASSIGN,
133 EXPR_BINARY_MOD_ASSIGN,
134 EXPR_BINARY_ADD_ASSIGN,
135 EXPR_BINARY_SUB_ASSIGN,
136 EXPR_BINARY_SHIFTLEFT_ASSIGN,
137 EXPR_BINARY_SHIFTRIGHT_ASSIGN,
138 EXPR_BINARY_BITWISE_AND_ASSIGN,
139 EXPR_BINARY_BITWISE_XOR_ASSIGN,
140 EXPR_BINARY_BITWISE_OR_ASSIGN,
143 EXPR_BINARY_ISGREATER,
144 EXPR_BINARY_ISGREATEREQUAL,
146 EXPR_BINARY_ISLESSEQUAL,
147 EXPR_BINARY_ISLESSGREATER,
148 EXPR_BINARY_ISUNORDERED,
149 EXPR_BINARY_LAST = EXPR_BINARY_ISUNORDERED,
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__ */
159 /* convenience macros */
160 #define EXPR_BINARY_CASES \
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_ISGREATER: \
192 case EXPR_BINARY_ISGREATEREQUAL: \
193 case EXPR_BINARY_ISLESS: \
194 case EXPR_BINARY_ISLESSEQUAL: \
195 case EXPR_BINARY_ISLESSGREATER: \
196 case EXPR_BINARY_ISUNORDERED
199 * unary expression with mandatory operand
201 #define EXPR_UNARY_CASES_MANDATORY \
203 case EXPR_UNARY_PLUS: \
204 case EXPR_UNARY_COMPLEMENT: \
205 case EXPR_UNARY_NOT: \
206 case EXPR_UNARY_DEREFERENCE: \
207 case EXPR_UNARY_TAKE_ADDRESS: \
208 case EXPR_UNARY_POSTFIX_INCREMENT: \
209 case EXPR_UNARY_POSTFIX_DECREMENT: \
210 case EXPR_UNARY_PREFIX_INCREMENT: \
211 case EXPR_UNARY_PREFIX_DECREMENT: \
212 case EXPR_UNARY_CAST: \
213 case EXPR_UNARY_ASSUME: \
214 case EXPR_UNARY_DELETE: \
215 case EXPR_UNARY_DELETE_ARRAY
218 * unary expression with optional operand
220 #define EXPR_UNARY_CASES_OPTIONAL \
223 #define EXPR_UNARY_CASES \
224 EXPR_UNARY_CASES_MANDATORY: \
225 case EXPR_UNARY_CASES_OPTIONAL
227 #define EXPR_LITERAL_CASES \
228 EXPR_LITERAL_BOOLEAN: \
229 case EXPR_LITERAL_INTEGER: \
230 case EXPR_LITERAL_FLOATINGPOINT: \
231 case EXPR_LITERAL_MS_NOOP
234 * The base class of every expression.
236 struct expression_base_t {
237 expression_kind_t kind; /**< The expression kind. */
238 type_t *type; /**< The type of the expression. */
239 position_t pos; /**< The source position of this expression. */
240 bool parenthesized : 1;
242 bool transformed : 1; /**< Set if this expression was transformed. */
244 bool implicit : 1; /**< compiler generated expression.
245 Examples: select into anonymous structs,
250 * integer, float and boolean constants
252 struct literal_expression_t {
253 expression_base_t base;
255 char const *suffix; /**< Start of the suffix in value. */
258 ir_tarval *target_value;
262 * string and character literals
264 struct string_literal_expression_t {
265 expression_base_t base;
269 struct funcname_expression_t {
270 expression_base_t base;
271 funcname_kind_t kind;
274 struct compound_literal_expression_t {
275 expression_base_t base;
277 initializer_t *initializer;
281 struct builtin_constant_expression_t {
282 expression_base_t base;
286 struct builtin_types_compatible_expression_t {
287 expression_base_t base;
292 struct reference_expression_t {
293 expression_base_t base;
298 * An argument of a call.
300 struct call_argument_t {
301 expression_t *expression; /**< The expression which value is transmitted. */
302 call_argument_t *next; /**< Links to the next argument of this call. */
306 struct call_expression_t {
307 expression_base_t base;
308 expression_t *function; /**< The address of the function to call. */
309 call_argument_t *arguments; /**< List of arguments of this call. */
313 struct unary_expression_t {
314 expression_base_t base;
315 expression_t *value; /**< The unary operand. */
318 struct binary_expression_t {
319 expression_base_t base;
324 struct select_expression_t {
325 expression_base_t base;
326 expression_t *compound;
327 entity_t *compound_entry;
330 struct array_access_expression_t {
331 expression_base_t base;
332 expression_t *array_ref; /**< the referenced array */
333 expression_t *index; /**< the index used */
334 bool flipped; /**< True if index/ref was written in a 5[a] way */
337 struct typeprop_expression_t {
338 expression_base_t base;
340 expression_t *tp_expression;
343 struct designator_t {
345 symbol_t *symbol; /**< the symbol if any */
346 expression_t *array_index; /**< the array index if any */
350 struct offsetof_expression_t {
351 expression_base_t base;
353 designator_t *designator;
356 struct va_start_expression_t {
357 expression_base_t base;
359 expression_t *parameter;
362 struct va_arg_expression_t {
363 expression_base_t base;
367 struct va_copy_expression_t {
368 expression_base_t base;
369 expression_t *dst; /**< destination argument */
370 expression_t *src; /**< source argument */
373 struct conditional_expression_t {
374 expression_base_t base;
375 expression_t *condition;
376 expression_t *true_expression;
377 expression_t *false_expression;
380 struct statement_expression_t {
381 expression_base_t base;
382 statement_t *statement;
385 struct classify_type_expression_t {
386 expression_base_t base;
387 expression_t *type_expression;
390 struct label_address_expression_t {
391 expression_base_t base;
396 expression_kind_t kind;
397 expression_base_t base;
398 literal_expression_t literal;
399 string_literal_expression_t string_literal;
400 funcname_expression_t funcname;
401 compound_literal_expression_t compound_literal;
402 builtin_constant_expression_t builtin_constant;
403 builtin_types_compatible_expression_t builtin_types_compatible;
404 reference_expression_t reference;
405 call_expression_t call;
406 unary_expression_t unary;
407 binary_expression_t binary;
408 select_expression_t select;
409 array_access_expression_t array_access;
410 typeprop_expression_t typeprop;
411 offsetof_expression_t offsetofe;
412 va_start_expression_t va_starte;
413 va_arg_expression_t va_arge;
414 va_copy_expression_t va_copye;
415 conditional_expression_t conditional;
416 statement_expression_t statement;
417 classify_type_expression_t classify_type;
418 label_address_expression_t label_address;
421 typedef enum initializer_kind_t {
425 INITIALIZER_DESIGNATOR
426 } initializer_kind_t;
428 struct initializer_base_t {
429 initializer_kind_t kind;
432 struct initializer_value_t {
433 initializer_base_t base;
437 struct initializer_list_t {
438 initializer_base_t base;
440 initializer_t *initializers[];
443 struct initializer_designator_t {
444 initializer_base_t base;
445 designator_t *designator;
448 union initializer_t {
449 initializer_kind_t kind;
450 initializer_base_t base;
451 initializer_value_t value;
452 initializer_list_t list;
453 initializer_designator_t designator;
456 static inline string_literal_expression_t const *get_init_string(initializer_t const *const init)
458 assert(init->kind == INITIALIZER_STRING);
459 assert(init->value.value->kind == EXPR_STRING_LITERAL);
460 return &init->value.value->string_literal;
464 * The statement kinds.
466 typedef enum statement_kind_t {
471 STATEMENT_DECLARATION,
474 STATEMENT_EXPRESSION,
477 STATEMENT_COMPUTED_GOTO,
480 STATEMENT_CASE_LABEL,
484 STATEMENT_MS_TRY, /**< MS __try/__finally or __try/__except */
485 STATEMENT_LEAVE /**< MS __leave */
489 * The base class of every statement.
491 struct statement_base_t {
492 statement_kind_t kind;
493 statement_t *next; /**< Point to the next statement in a compound statement. */
495 statement_t *parent; /**< The Parent statement that controls the execution. */
496 bool reachable; /**< True, if this statement is reachable. */
502 struct return_statement_t {
503 statement_base_t base;
504 expression_t *value; /**< The return value if any. */
507 struct compound_statement_t {
508 statement_base_t base;
509 statement_t *statements;
511 bool stmt_expr; /**< True if this compound statement is a statement expression. */
514 struct declaration_statement_t {
515 statement_base_t base;
516 entity_t *declarations_begin;
517 entity_t *declarations_end;
520 struct if_statement_t {
521 statement_base_t base;
523 expression_t *condition;
524 statement_t *true_statement;
525 statement_t *false_statement;
528 struct switch_statement_t {
529 statement_base_t base;
531 expression_t *expression;
533 case_label_statement_t *first_case, *last_case; /**< List of all cases, including default. */
534 case_label_statement_t *default_label; /**< The default label if existent. */
537 struct goto_statement_t {
538 statement_base_t base;
539 label_t *label; /**< The destination label. */
540 goto_statement_t *next; /**< links all goto statements of a function */
543 struct computed_goto_statement_t {
544 statement_base_t base;
545 expression_t *expression; /**< The expression for the computed goto. */
548 struct case_label_statement_t {
549 statement_base_t base;
550 expression_t *expression; /**< The case label expression, NULL for default label. */
551 expression_t *end_range; /**< For GNUC case a .. b: the end range expression, NULL else. */
552 case_label_statement_t *next; /**< link to the next case label in switch */
553 statement_t *statement;
554 ir_tarval *first_case;
555 ir_tarval *last_case;
556 bool is_bad; /**< If set marked as bad to suppress warnings. */
557 bool is_empty_range; /**< If set marked this as an empty range. */
561 struct label_statement_t {
562 statement_base_t base;
564 statement_t *statement;
565 label_statement_t *next; /**< links all label statements of a function */
568 struct expression_statement_t {
569 statement_base_t base;
570 expression_t *expression;
573 struct do_while_statement_t {
574 statement_base_t base;
576 expression_t *condition;
580 struct for_statement_t {
581 statement_base_t base;
583 expression_t *initialisation;
584 expression_t *condition;
587 bool condition_reachable:1;
588 bool step_reachable:1;
591 struct asm_argument_t {
592 string_t constraints;
593 expression_t *expression;
595 asm_argument_t *next;
598 struct asm_clobber_t {
608 struct asm_statement_t {
609 statement_base_t base;
611 asm_argument_t *inputs;
612 asm_argument_t *outputs;
613 asm_clobber_t *clobbers;
618 struct ms_try_statement_t {
619 statement_base_t base;
620 statement_t *try_statement;
621 expression_t *except_expression; /**< non-null for except, NULL for finally */
622 statement_t *final_statement;
625 struct leave_statement_t {
626 statement_base_t base;
630 statement_kind_t kind;
631 statement_base_t base;
632 return_statement_t returns;
633 compound_statement_t compound;
634 declaration_statement_t declaration;
636 switch_statement_t switchs;
637 computed_goto_statement_t computed_goto;
638 goto_statement_t gotos;
639 case_label_statement_t case_label;
640 label_statement_t label;
641 expression_statement_t expression;
642 do_while_statement_t do_while;
643 for_statement_t fors;
644 asm_statement_t asms;
645 ms_try_statement_t ms_try;
646 leave_statement_t leave;
649 struct translation_unit_t {
651 statement_t *global_asm;
655 * Allocate an AST node with given size and
656 * initialize all fields with zero.
658 static inline void *allocate_ast_zero(size_t size)
660 return memset(obstack_alloc(&ast_obstack, size), 0, size);
663 /** If set, implicit casts are printed. */
664 extern bool print_implicit_casts;
665 /** If set parenthesis are printed to indicate operator precedence. */
666 extern bool print_parenthesis;