11 #include "adt/error.h"
13 struct obstack ast_obstack;
18 /** If set, implicit casts are printed. */
19 bool print_implicit_casts = false;
21 /** If set parenthesis are printed to indicate operator precedence. */
22 bool print_parenthesis = false;
24 static void print_statement(const statement_t *statement);
25 static void print_expression_prec(const expression_t *expression, unsigned prec);
27 void change_indent(int delta)
33 void print_indent(void)
35 for(int i = 0; i < indent; ++i)
41 PREC_COMMA = 2, /* , left to right */
42 PREC_ASSIGN = 4, /* = += -= *= /= %= <<= >>= &= ^= |= right to left */
43 PREC_COND = 6, /* ?: right to left */
44 PREC_LOG_OR = 8, /* || left to right */
45 PREC_LOG_AND = 10, /* && left to right */
46 PREC_BIT_OR = 12, /* | left to right */
47 PREC_BIT_XOR = 14, /* ^ left to right */
48 PREC_BIT_AND = 16, /* & left to right */
49 PREC_EQ = 18, /* == != left to right */
50 PREC_CMP = 20, /* < <= > >= left to right */
51 PREC_SHF = 22, /* << >> left to right */
52 PREC_PLUS = 24, /* + - left to right */
53 PREC_MUL = 26, /* * / % left to right */
54 PREC_UNARY = 28, /* ! ~ ++ -- + - (type) * & sizeof right to left */
55 PREC_ACCESS = 30, /* () [] -> . left to right */
56 PREC_PRIM = 32, /* primary */
61 * Returns 1 if a given precedence level has right-to-left
62 * associativity, else -1.
64 static int right_to_left(unsigned precedence) {
65 return (precedence == PREC_ASSIGN || precedence == PREC_COND ||
66 precedence == PREC_UNARY) ? 1 : -1;
70 * Return the precedence of an expression.
72 static unsigned get_expression_precedence(expression_kind_t kind)
74 static const unsigned prec[] = {
75 [EXPR_UNKNOWN] = PREC_PRIM,
76 [EXPR_INVALID] = PREC_PRIM,
77 [EXPR_REFERENCE] = PREC_PRIM,
78 [EXPR_CONST] = PREC_PRIM,
79 [EXPR_STRING_LITERAL] = PREC_PRIM,
80 [EXPR_WIDE_STRING_LITERAL] = PREC_PRIM,
81 [EXPR_CALL] = PREC_PRIM,
82 [EXPR_CONDITIONAL] = PREC_COND,
83 [EXPR_SELECT] = PREC_ACCESS,
84 [EXPR_ARRAY_ACCESS] = PREC_ACCESS,
85 [EXPR_SIZEOF] = PREC_UNARY,
86 [EXPR_CLASSIFY_TYPE] = PREC_UNARY,
87 [EXPR_ALIGNOF] = PREC_UNARY,
89 [EXPR_FUNCTION] = PREC_PRIM,
90 [EXPR_PRETTY_FUNCTION] = PREC_PRIM,
91 [EXPR_BUILTIN_SYMBOL] = PREC_PRIM,
92 [EXPR_BUILTIN_CONSTANT_P] = PREC_PRIM,
93 [EXPR_BUILTIN_PREFETCH] = PREC_PRIM,
94 [EXPR_OFFSETOF] = PREC_PRIM,
95 [EXPR_VA_START] = PREC_PRIM,
96 [EXPR_VA_ARG] = PREC_PRIM,
97 [EXPR_STATEMENT] = PREC_ACCESS,
99 [EXPR_UNARY_NEGATE] = PREC_UNARY,
100 [EXPR_UNARY_PLUS] = PREC_UNARY,
101 [EXPR_UNARY_BITWISE_NEGATE] = PREC_UNARY,
102 [EXPR_UNARY_NOT] = PREC_UNARY,
103 [EXPR_UNARY_DEREFERENCE] = PREC_UNARY,
104 [EXPR_UNARY_TAKE_ADDRESS] = PREC_UNARY,
105 [EXPR_UNARY_POSTFIX_INCREMENT] = PREC_UNARY,
106 [EXPR_UNARY_POSTFIX_DECREMENT] = PREC_UNARY,
107 [EXPR_UNARY_PREFIX_INCREMENT] = PREC_UNARY,
108 [EXPR_UNARY_PREFIX_DECREMENT] = PREC_UNARY,
109 [EXPR_UNARY_CAST] = PREC_UNARY,
110 [EXPR_UNARY_CAST_IMPLICIT] = PREC_UNARY,
111 [EXPR_UNARY_ASSUME] = PREC_PRIM,
112 [EXPR_UNARY_BITFIELD_EXTRACT] = PREC_ACCESS,
114 [EXPR_BINARY_ADD] = PREC_PLUS,
115 [EXPR_BINARY_SUB] = PREC_PLUS,
116 [EXPR_BINARY_MUL] = PREC_MUL,
117 [EXPR_BINARY_DIV] = PREC_MUL,
118 [EXPR_BINARY_MOD] = PREC_MUL,
119 [EXPR_BINARY_EQUAL] = PREC_EQ,
120 [EXPR_BINARY_NOTEQUAL] = PREC_EQ,
121 [EXPR_BINARY_LESS] = PREC_CMP,
122 [EXPR_BINARY_LESSEQUAL] = PREC_CMP,
123 [EXPR_BINARY_GREATER] = PREC_CMP,
124 [EXPR_BINARY_GREATEREQUAL] = PREC_CMP,
125 [EXPR_BINARY_BITWISE_AND] = PREC_BIT_AND,
126 [EXPR_BINARY_BITWISE_OR] = PREC_BIT_OR,
127 [EXPR_BINARY_BITWISE_XOR] = PREC_BIT_XOR,
128 [EXPR_BINARY_LOGICAL_AND] = PREC_LOG_AND,
129 [EXPR_BINARY_LOGICAL_OR] = PREC_LOG_OR,
130 [EXPR_BINARY_SHIFTLEFT] = PREC_SHF,
131 [EXPR_BINARY_SHIFTRIGHT] = PREC_SHF,
132 [EXPR_BINARY_ASSIGN] = PREC_ASSIGN,
133 [EXPR_BINARY_MUL_ASSIGN] = PREC_ASSIGN,
134 [EXPR_BINARY_DIV_ASSIGN] = PREC_ASSIGN,
135 [EXPR_BINARY_MOD_ASSIGN] = PREC_ASSIGN,
136 [EXPR_BINARY_ADD_ASSIGN] = PREC_ASSIGN,
137 [EXPR_BINARY_SUB_ASSIGN] = PREC_ASSIGN,
138 [EXPR_BINARY_SHIFTLEFT_ASSIGN] = PREC_ASSIGN,
139 [EXPR_BINARY_SHIFTRIGHT_ASSIGN] = PREC_ASSIGN,
140 [EXPR_BINARY_BITWISE_AND_ASSIGN] = PREC_ASSIGN,
141 [EXPR_BINARY_BITWISE_XOR_ASSIGN] = PREC_ASSIGN,
142 [EXPR_BINARY_BITWISE_OR_ASSIGN] = PREC_ASSIGN,
143 [EXPR_BINARY_COMMA] = PREC_COMMA,
145 [EXPR_BINARY_BUILTIN_EXPECT] = PREC_PRIM,
146 [EXPR_BINARY_ISGREATER] = PREC_PRIM,
147 [EXPR_BINARY_ISGREATEREQUAL] = PREC_PRIM,
148 [EXPR_BINARY_ISLESS] = PREC_PRIM,
149 [EXPR_BINARY_ISLESSEQUAL] = PREC_PRIM,
150 [EXPR_BINARY_ISLESSGREATER] = PREC_PRIM,
151 [EXPR_BINARY_ISUNORDERED] = PREC_PRIM
154 if ((unsigned)kind >= (sizeof(prec)/sizeof(prec[0]))) {
155 panic("wrong expression kind");
157 unsigned res = prec[kind];
158 if (res == PREC_BOTTOM) {
159 panic("expression kind not defined in get_expression_precedence()");
166 * Print a constant expression.
168 static void print_const(const const_expression_t *cnst)
170 if(cnst->base.type == NULL)
173 if(is_type_integer(cnst->base.type)) {
174 fprintf(out, "%lld", cnst->v.int_value);
175 } else if(is_type_float(cnst->base.type)) {
176 fprintf(out, "%Lf", cnst->v.float_value);
181 * Print a quoted string constant.
183 static void print_quoted_string(const string_t *const string)
186 const char *end = string->begin + string->size;
187 for (const char *c = string->begin; c != end; ++c) {
189 case '\"': fputs("\\\"", out); break;
190 case '\\': fputs("\\\\", out); break;
191 case '\a': fputs("\\a", out); break;
192 case '\b': fputs("\\b", out); break;
193 case '\f': fputs("\\f", out); break;
194 case '\n': fputs("\\n", out); break;
195 case '\r': fputs("\\r", out); break;
196 case '\t': fputs("\\t", out); break;
197 case '\v': fputs("\\v", out); break;
198 case '\?': fputs("\\?", out); break;
201 fprintf(out, "\\%03o", *c);
212 * Prints a string literal expression.
214 static void print_string_literal(
215 const string_literal_expression_t *string_literal)
217 print_quoted_string(&string_literal->value);
221 * Prints a wide string literal expression.
223 static void print_wide_string_literal(
224 const wide_string_literal_expression_t *const wstr)
227 for (const wchar_rep_t *c = wstr->value.begin,
228 *end = c + wstr->value.size;
231 case L'\"': fputs("\\\"", out); break;
232 case L'\\': fputs("\\\\", out); break;
233 case L'\a': fputs("\\a", out); break;
234 case L'\b': fputs("\\b", out); break;
235 case L'\f': fputs("\\f", out); break;
236 case L'\n': fputs("\\n", out); break;
237 case L'\r': fputs("\\r", out); break;
238 case L'\t': fputs("\\t", out); break;
239 case L'\v': fputs("\\v", out); break;
240 case L'\?': fputs("\\?", out); break;
242 const unsigned tc = *c;
245 fprintf(out, "\\%03o", (char)*c);
249 } else if (tc < 0x800) {
250 fputc(0xC0 | (tc >> 6), out);
251 fputc(0x80 | (tc & 0x3F), out);
252 } else if (tc < 0x10000) {
253 fputc(0xE0 | ( tc >> 12), out);
254 fputc(0x80 | ((tc >> 6) & 0x3F), out);
255 fputc(0x80 | ( tc & 0x3F), out);
257 fputc(0xF0 | ( tc >> 18), out);
258 fputc(0x80 | ((tc >> 12) & 0x3F), out);
259 fputc(0x80 | ((tc >> 6) & 0x3F), out);
260 fputc(0x80 | ( tc & 0x3F), out);
269 * Prints a call expression.
271 static void print_call_expression(const call_expression_t *call)
273 unsigned prec = get_expression_precedence(call->base.kind);
274 print_expression_prec(call->function, prec);
276 call_argument_t *argument = call->arguments;
278 while(argument != NULL) {
284 print_expression_prec(argument->expression, PREC_COMMA + 1);
286 argument = argument->next;
292 * Prints a binary expression.
294 static void print_binary_expression(const binary_expression_t *binexpr)
296 unsigned prec = get_expression_precedence(binexpr->base.kind);
297 int r2l = right_to_left(prec);
299 if(binexpr->base.kind == EXPR_BINARY_BUILTIN_EXPECT) {
300 fputs("__builtin_expect(", out);
301 print_expression_prec(binexpr->left, prec);
303 print_expression_prec(binexpr->right, prec);
308 print_expression_prec(binexpr->left, prec + r2l);
309 if (binexpr->base.kind != EXPR_BINARY_COMMA) {
312 switch (binexpr->base.kind) {
313 case EXPR_BINARY_COMMA: fputs(",", out); break;
314 case EXPR_BINARY_ASSIGN: fputs("=", out); break;
315 case EXPR_BINARY_ADD: fputs("+", out); break;
316 case EXPR_BINARY_SUB: fputs("-", out); break;
317 case EXPR_BINARY_MUL: fputs("*", out); break;
318 case EXPR_BINARY_MOD: fputs("%", out); break;
319 case EXPR_BINARY_DIV: fputs("/", out); break;
320 case EXPR_BINARY_BITWISE_OR: fputs("|", out); break;
321 case EXPR_BINARY_BITWISE_AND: fputs("&", out); break;
322 case EXPR_BINARY_BITWISE_XOR: fputs("^", out); break;
323 case EXPR_BINARY_LOGICAL_OR: fputs("||", out); break;
324 case EXPR_BINARY_LOGICAL_AND: fputs("&&", out); break;
325 case EXPR_BINARY_NOTEQUAL: fputs("!=", out); break;
326 case EXPR_BINARY_EQUAL: fputs("==", out); break;
327 case EXPR_BINARY_LESS: fputs("<", out); break;
328 case EXPR_BINARY_LESSEQUAL: fputs("<=", out); break;
329 case EXPR_BINARY_GREATER: fputs(">", out); break;
330 case EXPR_BINARY_GREATEREQUAL: fputs(">=", out); break;
331 case EXPR_BINARY_SHIFTLEFT: fputs("<<", out); break;
332 case EXPR_BINARY_SHIFTRIGHT: fputs(">>", out); break;
334 case EXPR_BINARY_ADD_ASSIGN: fputs("+=", out); break;
335 case EXPR_BINARY_SUB_ASSIGN: fputs("-=", out); break;
336 case EXPR_BINARY_MUL_ASSIGN: fputs("*=", out); break;
337 case EXPR_BINARY_MOD_ASSIGN: fputs("%=", out); break;
338 case EXPR_BINARY_DIV_ASSIGN: fputs("/=", out); break;
339 case EXPR_BINARY_BITWISE_OR_ASSIGN: fputs("|=", out); break;
340 case EXPR_BINARY_BITWISE_AND_ASSIGN: fputs("&=", out); break;
341 case EXPR_BINARY_BITWISE_XOR_ASSIGN: fputs("^=", out); break;
342 case EXPR_BINARY_SHIFTLEFT_ASSIGN: fputs("<<=", out); break;
343 case EXPR_BINARY_SHIFTRIGHT_ASSIGN: fputs(">>=", out); break;
344 default: panic("invalid binexpression found");
347 print_expression_prec(binexpr->right, prec - r2l);
351 * Prints an unary expression.
353 static void print_unary_expression(const unary_expression_t *unexpr)
355 unsigned prec = get_expression_precedence(unexpr->base.kind);
356 switch(unexpr->base.kind) {
357 case EXPR_UNARY_NEGATE: fputs("-", out); break;
358 case EXPR_UNARY_PLUS: fputs("+", out); break;
359 case EXPR_UNARY_NOT: fputs("!", out); break;
360 case EXPR_UNARY_BITWISE_NEGATE: fputs("~", out); break;
361 case EXPR_UNARY_PREFIX_INCREMENT: fputs("++", out); break;
362 case EXPR_UNARY_PREFIX_DECREMENT: fputs("--", out); break;
363 case EXPR_UNARY_DEREFERENCE: fputs("*", out); break;
364 case EXPR_UNARY_TAKE_ADDRESS: fputs("&", out); break;
366 case EXPR_UNARY_BITFIELD_EXTRACT:
367 print_expression_prec(unexpr->value, prec);
370 case EXPR_UNARY_POSTFIX_INCREMENT:
371 print_expression_prec(unexpr->value, prec);
374 case EXPR_UNARY_POSTFIX_DECREMENT:
375 print_expression_prec(unexpr->value, prec);
378 case EXPR_UNARY_CAST_IMPLICIT:
379 if(!print_implicit_casts) {
380 print_expression_prec(unexpr->value, prec);
384 case EXPR_UNARY_CAST:
386 print_type(unexpr->base.type);
389 case EXPR_UNARY_ASSUME:
390 fputs("__assume(", out);
391 print_expression_prec(unexpr->value, PREC_COMMA + 1);
395 panic("invalid unary expression found");
397 print_expression_prec(unexpr->value, prec);
401 * Prints a reference expression.
403 static void print_reference_expression(const reference_expression_t *ref)
405 fprintf(out, "%s", ref->declaration->symbol->string);
409 * Prints an array expression.
411 static void print_array_expression(const array_access_expression_t *expression)
413 unsigned prec = get_expression_precedence(expression->base.kind);
414 if(!expression->flipped) {
415 print_expression_prec(expression->array_ref, prec);
417 print_expression_prec(expression->index, prec);
420 print_expression_prec(expression->index, prec);
422 print_expression_prec(expression->array_ref, prec);
428 * Prints a typeproperty expression.
430 static void print_typeprop_expression(const typeprop_expression_t *expression)
432 if (expression->base.kind == EXPR_SIZEOF) {
433 fputs("sizeof", out);
435 assert(expression->base.kind == EXPR_ALIGNOF);
436 fputs("__alignof__", out);
438 if(expression->tp_expression != NULL) {
439 /* always print the '()' here, sizeof x is right but unusual */
441 print_expression_prec(expression->tp_expression, PREC_ACCESS);
445 print_type(expression->type);
451 * Prints an builtin symbol
453 static void print_builtin_symbol(const builtin_symbol_expression_t *expression)
455 fputs(expression->symbol->string, out);
459 * Prints a builtin constant expression.
461 static void print_builtin_constant(const builtin_constant_expression_t *expression)
463 fputs("__builtin_constant_p(", out);
464 print_expression_prec(expression->value, PREC_COMMA + 1);
469 * Prints a builtin prefetch expression.
471 static void print_builtin_prefetch(const builtin_prefetch_expression_t *expression)
473 fputs("__builtin_prefetch(", out);
474 print_expression_prec(expression->adr, PREC_COMMA + 1);
475 if (expression->rw) {
477 print_expression_prec(expression->rw, PREC_COMMA + 1);
479 if (expression->locality) {
481 print_expression_prec(expression->locality, PREC_COMMA + 1);
487 * Prints a conditional expression.
489 static void print_conditional(const conditional_expression_t *expression)
491 unsigned prec = get_expression_precedence(expression->base.kind);
493 print_expression_prec(expression->condition, prec);
495 print_expression_prec(expression->true_expression, prec);
497 print_expression_prec(expression->false_expression, prec);
502 * Prints a va_start expression.
504 static void print_va_start(const va_start_expression_t *const expression)
506 fputs("__builtin_va_start(", out);
507 print_expression_prec(expression->ap, PREC_COMMA + 1);
509 fputs(expression->parameter->symbol->string, out);
514 * Prints a va_arg expression.
516 static void print_va_arg(const va_arg_expression_t *expression)
518 fputs("__builtin_va_arg(", out);
519 print_expression_prec(expression->ap, PREC_COMMA + 1);
521 print_type(expression->base.type);
526 * Prints a select expression.
528 static void print_select(const select_expression_t *expression)
530 unsigned prec = get_expression_precedence(expression->base.kind);
531 print_expression_prec(expression->compound, prec);
532 if(expression->compound->base.type == NULL ||
533 expression->compound->base.type->kind == TYPE_POINTER) {
538 fputs(expression->symbol->string, out);
542 * Prints a type classify expression.
544 static void print_classify_type_expression(
545 const classify_type_expression_t *const expr)
547 fputs("__builtin_classify_type(", out);
548 print_expression_prec(expr->type_expression, PREC_COMMA + 1);
552 static void print_designator(const designator_t *designator)
554 fputs(designator->symbol->string, out);
555 for (designator = designator->next; designator != NULL; designator = designator->next) {
556 if (designator->array_access) {
558 print_expression_prec(designator->array_access, PREC_ACCESS);
562 fputs(designator->symbol->string, out);
568 * Prints an offsetof classify expression.
570 static void print_offsetof_expression(const offsetof_expression_t *expression)
572 fputs("__builtin_offsetof", out);
574 print_type(expression->type);
576 print_designator(expression->designator);
581 * Prints a statement expression.
583 static void print_statement_expression(const statement_expression_t *expression)
586 print_statement(expression->statement);
590 static void print_expression_prec(const expression_t *expression, unsigned top_prec)
592 unsigned prec = get_expression_precedence(expression->base.kind);
593 if (print_parenthesis && top_prec != PREC_BOTTOM)
597 switch(expression->kind) {
600 fprintf(out, "*invalid expression*");
603 print_const(&expression->conste);
606 case EXPR_PRETTY_FUNCTION:
607 case EXPR_STRING_LITERAL:
608 print_string_literal(&expression->string);
610 case EXPR_WIDE_STRING_LITERAL:
611 print_wide_string_literal(&expression->wide_string);
614 print_call_expression(&expression->call);
617 print_binary_expression(&expression->binary);
620 print_reference_expression(&expression->reference);
622 case EXPR_ARRAY_ACCESS:
623 print_array_expression(&expression->array_access);
626 print_unary_expression(&expression->unary);
630 print_typeprop_expression(&expression->typeprop);
632 case EXPR_BUILTIN_SYMBOL:
633 print_builtin_symbol(&expression->builtin_symbol);
635 case EXPR_BUILTIN_CONSTANT_P:
636 print_builtin_constant(&expression->builtin_constant);
638 case EXPR_BUILTIN_PREFETCH:
639 print_builtin_prefetch(&expression->builtin_prefetch);
641 case EXPR_CONDITIONAL:
642 print_conditional(&expression->conditional);
645 print_va_start(&expression->va_starte);
648 print_va_arg(&expression->va_arge);
651 print_select(&expression->select);
653 case EXPR_CLASSIFY_TYPE:
654 print_classify_type_expression(&expression->classify_type);
657 print_offsetof_expression(&expression->offsetofe);
660 print_statement_expression(&expression->statement);
665 fprintf(out, "some expression of type %d", (int) expression->kind);
672 static void print_compound_statement(const compound_statement_t *block)
677 statement_t *statement = block->statements;
678 while(statement != NULL) {
679 if (statement->base.kind == STATEMENT_CASE_LABEL)
682 print_statement(statement);
684 statement = statement->base.next;
691 static void print_return_statement(const return_statement_t *statement)
693 fprintf(out, "return ");
694 if(statement->value != NULL)
695 print_expression_prec(statement->value, PREC_BOTTOM);
699 static void print_expression_statement(const expression_statement_t *statement)
701 print_expression(statement->expression);
705 static void print_goto_statement(const goto_statement_t *statement)
707 fprintf(out, "goto ");
708 fputs(statement->label->symbol->string, out);
709 fprintf(stderr, "(%p)", (void*) statement->label);
713 static void print_label_statement(const label_statement_t *statement)
715 fprintf(stderr, "(%p)", (void*) statement->label);
716 fprintf(out, "%s:\n", statement->label->symbol->string);
717 if(statement->statement != NULL) {
718 print_statement(statement->statement);
722 static void print_if_statement(const if_statement_t *statement)
725 print_expression(statement->condition);
727 if(statement->true_statement != NULL) {
728 print_statement(statement->true_statement);
731 if(statement->false_statement != NULL) {
734 print_statement(statement->false_statement);
738 static void print_switch_statement(const switch_statement_t *statement)
740 fputs("switch(", out);
741 print_expression(statement->expression);
743 print_statement(statement->body);
746 static void print_case_label(const case_label_statement_t *statement)
748 if(statement->expression == NULL) {
749 fputs("default:\n", out);
752 print_expression(statement->expression);
756 if(statement->statement != NULL) {
757 if (statement->statement->base.kind == STATEMENT_CASE_LABEL) {
761 print_statement(statement->statement);
765 static void print_declaration_statement(
766 const declaration_statement_t *statement)
769 declaration_t *declaration = statement->declarations_begin;
770 for( ; declaration != statement->declarations_end->next;
771 declaration = declaration->next) {
777 print_declaration(declaration);
782 static void print_while_statement(const while_statement_t *statement)
784 fputs("while(", out);
785 print_expression(statement->condition);
787 print_statement(statement->body);
790 static void print_do_while_statement(const do_while_statement_t *statement)
793 print_statement(statement->body);
795 fputs("while(", out);
796 print_expression(statement->condition);
800 static void print_for_statement(const for_statement_t *statement)
803 if(statement->scope.declarations != NULL) {
804 assert(statement->initialisation == NULL);
805 print_declaration(statement->scope.declarations);
806 if(statement->scope.declarations->next != NULL) {
807 panic("multiple declarations in for statement not supported yet");
811 if(statement->initialisation) {
812 print_expression(statement->initialisation);
816 if(statement->condition != NULL) {
817 print_expression(statement->condition);
820 if(statement->step != NULL) {
821 print_expression(statement->step);
824 print_statement(statement->body);
827 static void print_asm_constraints(asm_constraint_t *constraints)
829 asm_constraint_t *constraint = constraints;
830 for( ; constraint != NULL; constraint = constraint->next) {
831 if(constraint != constraints)
834 if(constraint->symbol) {
835 fprintf(out, "[%s] ", constraint->symbol->string);
837 print_quoted_string(&constraint->constraints);
839 print_expression(constraint->expression);
844 static void print_asm_clobbers(asm_clobber_t *clobbers)
846 asm_clobber_t *clobber = clobbers;
847 for( ; clobber != NULL; clobber = clobber->next) {
848 if(clobber != clobbers)
851 print_quoted_string(&clobber->clobber);
855 static void print_asm_statement(const asm_statement_t *statement)
858 if(statement->is_volatile) {
859 fputs("volatile ", out);
862 print_quoted_string(&statement->asm_text);
863 if(statement->inputs == NULL && statement->outputs == NULL
864 && statement->clobbers == NULL)
865 goto end_of_print_asm_statement;
868 print_asm_constraints(statement->inputs);
869 if(statement->outputs == NULL && statement->clobbers == NULL)
870 goto end_of_print_asm_statement;
873 print_asm_constraints(statement->outputs);
874 if(statement->clobbers == NULL)
875 goto end_of_print_asm_statement;
878 print_asm_clobbers(statement->clobbers);
880 end_of_print_asm_statement:
884 void print_statement(const statement_t *statement)
886 switch(statement->kind) {
887 case STATEMENT_COMPOUND:
888 print_compound_statement(&statement->compound);
890 case STATEMENT_RETURN:
891 print_return_statement(&statement->returns);
893 case STATEMENT_EXPRESSION:
894 print_expression_statement(&statement->expression);
896 case STATEMENT_LABEL:
897 print_label_statement(&statement->label);
900 print_goto_statement(&statement->gotos);
902 case STATEMENT_CONTINUE:
903 fputs("continue;\n", out);
905 case STATEMENT_BREAK:
906 fputs("break;\n", out);
909 print_if_statement(&statement->ifs);
911 case STATEMENT_SWITCH:
912 print_switch_statement(&statement->switchs);
914 case STATEMENT_CASE_LABEL:
915 print_case_label(&statement->case_label);
917 case STATEMENT_DECLARATION:
918 print_declaration_statement(&statement->declaration);
920 case STATEMENT_WHILE:
921 print_while_statement(&statement->whiles);
923 case STATEMENT_DO_WHILE:
924 print_do_while_statement(&statement->do_while);
927 print_for_statement(&statement->fors);
930 print_asm_statement(&statement->asms);
932 case STATEMENT_INVALID:
933 fprintf(out, "*invalid statement*");
938 static void print_storage_class(unsigned storage_class)
940 switch((storage_class_tag_t) storage_class) {
941 case STORAGE_CLASS_ENUM_ENTRY:
942 case STORAGE_CLASS_NONE:
944 case STORAGE_CLASS_TYPEDEF: fputs("typedef ", out); break;
945 case STORAGE_CLASS_EXTERN: fputs("extern ", out); break;
946 case STORAGE_CLASS_STATIC: fputs("static ", out); break;
947 case STORAGE_CLASS_AUTO: fputs("auto ", out); break;
948 case STORAGE_CLASS_REGISTER: fputs("register ", out); break;
949 case STORAGE_CLASS_THREAD: fputs("__thread", out); break;
950 case STORAGE_CLASS_THREAD_EXTERN: fputs("extern __thread", out); break;
951 case STORAGE_CLASS_THREAD_STATIC: fputs("static __thread", out); break;
955 void print_initializer(const initializer_t *initializer)
957 if(initializer->kind == INITIALIZER_VALUE) {
958 const initializer_value_t *value = &initializer->value;
959 print_expression(value->value);
963 assert(initializer->kind == INITIALIZER_LIST);
965 const initializer_list_t *list = &initializer->list;
967 for(size_t i = 0 ; i < list->len; ++i) {
971 print_initializer(list->initializers[i]);
976 static void print_normal_declaration(const declaration_t *declaration)
978 print_storage_class(declaration->storage_class);
979 if(declaration->is_inline) {
980 if (declaration->modifiers & DM_FORCEINLINE)
981 fputs("__forceinline ", out);
983 fputs("inline ", out);
985 print_type_ext(declaration->type, declaration->symbol,
986 &declaration->scope);
988 if(declaration->type->kind == TYPE_FUNCTION) {
989 if(declaration->init.statement != NULL) {
991 print_statement(declaration->init.statement);
994 } else if(declaration->init.initializer != NULL) {
996 print_initializer(declaration->init.initializer);
1002 * Prints an expression.
1004 void print_expression(const expression_t *expression) {
1005 print_expression_prec(expression, PREC_BOTTOM);
1008 void print_declaration(const declaration_t *declaration)
1010 if(declaration->namespc != NAMESPACE_NORMAL &&
1011 declaration->symbol == NULL)
1014 switch(declaration->namespc) {
1015 case NAMESPACE_NORMAL:
1016 print_normal_declaration(declaration);
1018 case NAMESPACE_STRUCT:
1019 fputs("struct ", out);
1020 fputs(declaration->symbol->string, out);
1022 print_compound_definition(declaration);
1025 case NAMESPACE_UNION:
1026 fputs("union ", out);
1027 fputs(declaration->symbol->string, out);
1029 print_compound_definition(declaration);
1032 case NAMESPACE_ENUM:
1033 fputs("enum ", out);
1034 fputs(declaration->symbol->string, out);
1036 print_enum_definition(declaration);
1042 void print_ast(const translation_unit_t *unit)
1046 declaration_t *declaration = unit->scope.declarations;
1047 for( ; declaration != NULL; declaration = declaration->next) {
1048 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
1050 if(declaration->namespc != NAMESPACE_NORMAL &&
1051 declaration->symbol == NULL)
1055 print_declaration(declaration);
1060 bool is_constant_expression(const expression_t *expression)
1062 switch(expression->kind) {
1065 case EXPR_STRING_LITERAL:
1066 case EXPR_WIDE_STRING_LITERAL:
1068 case EXPR_CLASSIFY_TYPE:
1070 case EXPR_PRETTY_FUNCTION:
1073 case EXPR_BUILTIN_CONSTANT_P:
1076 case EXPR_BUILTIN_SYMBOL:
1077 case EXPR_BUILTIN_PREFETCH:
1082 case EXPR_STATEMENT:
1083 case EXPR_UNARY_POSTFIX_INCREMENT:
1084 case EXPR_UNARY_POSTFIX_DECREMENT:
1085 case EXPR_UNARY_PREFIX_INCREMENT:
1086 case EXPR_UNARY_PREFIX_DECREMENT:
1087 case EXPR_UNARY_BITFIELD_EXTRACT:
1088 case EXPR_UNARY_ASSUME: /* has VOID type */
1089 case EXPR_BINARY_ASSIGN:
1090 case EXPR_BINARY_MUL_ASSIGN:
1091 case EXPR_BINARY_DIV_ASSIGN:
1092 case EXPR_BINARY_MOD_ASSIGN:
1093 case EXPR_BINARY_ADD_ASSIGN:
1094 case EXPR_BINARY_SUB_ASSIGN:
1095 case EXPR_BINARY_SHIFTLEFT_ASSIGN:
1096 case EXPR_BINARY_SHIFTRIGHT_ASSIGN:
1097 case EXPR_BINARY_BITWISE_AND_ASSIGN:
1098 case EXPR_BINARY_BITWISE_XOR_ASSIGN:
1099 case EXPR_BINARY_BITWISE_OR_ASSIGN:
1100 case EXPR_BINARY_COMMA:
1103 case EXPR_UNARY_NEGATE:
1104 case EXPR_UNARY_PLUS:
1105 case EXPR_UNARY_BITWISE_NEGATE:
1106 case EXPR_UNARY_NOT:
1107 case EXPR_UNARY_DEREFERENCE:
1108 case EXPR_UNARY_TAKE_ADDRESS:
1109 case EXPR_UNARY_CAST:
1110 case EXPR_UNARY_CAST_IMPLICIT:
1111 return is_constant_expression(expression->unary.value);
1113 case EXPR_BINARY_ADD:
1114 case EXPR_BINARY_SUB:
1115 case EXPR_BINARY_MUL:
1116 case EXPR_BINARY_DIV:
1117 case EXPR_BINARY_MOD:
1118 case EXPR_BINARY_EQUAL:
1119 case EXPR_BINARY_NOTEQUAL:
1120 case EXPR_BINARY_LESS:
1121 case EXPR_BINARY_LESSEQUAL:
1122 case EXPR_BINARY_GREATER:
1123 case EXPR_BINARY_GREATEREQUAL:
1124 case EXPR_BINARY_BITWISE_AND:
1125 case EXPR_BINARY_BITWISE_OR:
1126 case EXPR_BINARY_BITWISE_XOR:
1127 case EXPR_BINARY_LOGICAL_AND:
1128 case EXPR_BINARY_LOGICAL_OR:
1129 case EXPR_BINARY_SHIFTLEFT:
1130 case EXPR_BINARY_SHIFTRIGHT:
1131 case EXPR_BINARY_BUILTIN_EXPECT:
1132 case EXPR_BINARY_ISGREATER:
1133 case EXPR_BINARY_ISGREATEREQUAL:
1134 case EXPR_BINARY_ISLESS:
1135 case EXPR_BINARY_ISLESSEQUAL:
1136 case EXPR_BINARY_ISLESSGREATER:
1137 case EXPR_BINARY_ISUNORDERED:
1138 return is_constant_expression(expression->binary.left)
1139 && is_constant_expression(expression->binary.right);
1141 case EXPR_CONDITIONAL:
1142 /* TODO: not correct, we only have to test expressions which are
1143 * evaluated, which means either the true or false part might be not
1145 return is_constant_expression(expression->conditional.condition)
1146 && is_constant_expression(expression->conditional.true_expression)
1147 && is_constant_expression(expression->conditional.false_expression);
1149 case EXPR_ARRAY_ACCESS:
1150 return is_constant_expression(expression->array_access.array_ref)
1151 && is_constant_expression(expression->array_access.index);
1153 case EXPR_REFERENCE: {
1154 declaration_t *declaration = expression->reference.declaration;
1155 if(declaration->storage_class == STORAGE_CLASS_ENUM_ENTRY)
1165 panic("invalid expression found (is constant expression)");
1171 obstack_init(&ast_obstack);
1176 obstack_free(&ast_obstack, NULL);
1179 void ast_set_output(FILE *stream)
1182 type_set_output(stream);
1185 void* (allocate_ast) (size_t size)
1187 return _allocate_ast(size);