11 %token STRUCT END METHOD VAR IF THEN ELSE WHILE DO RETURN NOT OR THIS IDENT NUM ASSIGN
14 @i xx = @Statement.sin@;
18 @i @Statement.sout@ = @Statement.sin@;
20 *> xxputsin(@Statement.sout@,)
21 * geht nicht, weil verschachtelte macros deaktiviert sind */
25 @autosyn node imm exprcount
27 @attributes { char *name; } IDENT
28 @attributes { long val; } NUM
29 @attributes { struct symbol *f; int parms; } Parms
30 @attributes { struct symbol *f; } FeldID Structdef Program
31 @attributes { struct symbol *s; } Methoddef Statseq Exprs
32 @attributes { struct symbol *s; struct treenode *node; short imm; int exprcount; } Expr Minusterm Term
33 @attributes { struct symbol *s; struct treenode *node; } Lexpr Multerm Orterm Feld
34 @attributes { struct symbol *sin; struct symbol *sout; struct treenode *node; } Statement
36 @traversal @postorder c
37 @traversal @preorder reg
38 @traversal @postorder gen
44 @i @Program.f@ = tab_new();
45 @gen @revorder(1) printf("\t.text\n");
52 @i @Methoddef.s@ = @Program.0.f@;
53 @i @Program.1.f@ = @Program.0.f@;
56 | Structdef ';' Program
58 @i @Program.1.f@ = tab_merge(@Program.0.f@, @Structdef.f@, 1);
64 METHOD IDENT '(' Parms ')' Statseq END
67 @i @Statseq.s@ = tab_merge(@Methoddef.s@, @Parms.f@, 0);
68 @gen @revorder(1) func_header(@IDENT.name@);
75 @i @Structdef.f@ = @FeldID.f@;
80 /* lokale Vars werden in Statement in die tabelle eingefuegt */
83 @i @Parms.1.parms@ = @Parms.parms@ + 1;
84 @i @Parms.0.f@ = tab_add_symbol(@Parms.1.f@, @IDENT.name@, S_PARM, 1, @Parms.parms@);
89 @i @Parms.f@ = tab_new();
96 @i @FeldID.0.f@ = tab_add_symbol(@FeldID.1.f@, @IDENT.name@, S_FIELD, 1, -1);
101 @i @FeldID.f@ = tab_new();
106 Statement ';' Statseq
108 @i @Statement.sin@ = @Statseq.0.s@;
109 @i @Statseq.1.s@ = @Statement.sout@;
110 @gen write_tree(@Statement.node@, 0); burm_label(@Statement.node@); burm_reduce(@Statement.node@, 1);
122 @i @Statement.node@ = TREENULL;
125 | VAR IDENT ASSIGN Expr
127 /* tab_clone ist hier noetig, vgl. folgendes statement
128 * > var x := x - 1; */
129 @i @Statement.sout@ = tab_add_symbol(tab_clone(@Statement.sin@), @IDENT.name@, S_VAR, 1, -1);
131 @i @Statement.node@ = TREENULL;
138 @i @Statement.node@ = TREENULL;
141 | IF Expr THEN Statseq END
145 xxputsin(@Statseq.s@,)
146 @i @Statement.node@ = TREENULL;
149 | IF Expr THEN Statseq ELSE Statseq END
153 xxputsin(@Statseq.0.s@,)
154 xxputsin(@Statseq.1.s@,)
155 @i @Statement.node@ = TREENULL;
158 | WHILE Expr DO Statseq END
162 xxputsin(@Statseq.s@,)
163 @i @Statement.node@ = TREENULL;
170 @i @Statement.node@ = new_node(O_RET, @Expr.node@, TREENULL, 0);
171 @reg @Statement.node@->reg = next_reg((char *)NULL, 0); @Expr.node@->reg = @Statement.node@->reg;
178 @i @Lexpr.node@ = TREENULL;
179 @c check(@Lexpr.s@, @IDENT.name@, S_VAR|S_PARM);
187 @c check(@Feld.s@, @IDENT.name@, S_FIELD);
188 @i @Feld.node@ = TREENULL;
195 @reg @Term.node@->reg = @Expr.node@->reg;
200 @i @Expr.node@ = TREENULL;
205 @i @Expr.exprcount@ = @Term.exprcount@ + @Minusterm.exprcount@;
206 @i @Expr.node@ = new_node(O_SUB, @Minusterm.node@, @Term.node@, @Expr.exprcount@);
207 @i @Expr.imm@ = @Term.imm@ && @Minusterm.imm@;
211 fprintf(stderr, "at_expr: Minusterm.imm \"%i\", Term.imm \"%i\"\n", @Minusterm.imm@, @Term.imm@);
212 @Term.node@->reg = @Expr.node@->reg;
213 @Term.node@->skip = 1;
214 @Minusterm.node@->reg = next_reg(@Term.node@->reg, @Expr.node@->skip);
220 @i @Expr.node@ = TREENULL;
225 @i @Expr.node@ = TREENULL;
230 @i @Expr.node@ = TREENULL;
231 /* das is bloedsinn atm */ @i @Expr.imm@ = @Term.0.imm@ && @Term.1.imm@;
232 /* das is bloedsinn atm */ @i @Expr.exprcount@ = 0;
237 @i @Expr.node@ = TREENULL;
238 /* das is bloedsinn atm */ @i @Expr.imm@ = @Term.0.imm@ && @Term.1.imm@;
239 /* das is bloedsinn atm */ @i @Expr.exprcount@ = 0;
246 @i @Minusterm.0.exprcount@ = @Term.exprcount@ + @Minusterm.1.exprcount@;
247 @i @Minusterm.node@ = new_node(O_ADD, @Minusterm.1.node@, @Term.node@, @Minusterm.0.exprcount@);
248 @i @Minusterm.imm@ = @Term.imm@ && @Minusterm.1.imm@;
251 @Minusterm.1.node@->reg = @Minusterm.node@->reg;
252 @Term.node@->reg = next_reg(@Minusterm.1.node@->reg, @Minusterm.node@->skip);
258 @i @Minusterm.exprcount@ = @Term.exprcount@;
259 @reg @Term.node@->reg = @Minusterm.node@->reg;
266 @i @Multerm.node@ = TREENULL;
271 @i @Multerm.node@ = TREENULL;
278 @i @Orterm.node@ = TREENULL;
282 @i @Orterm.node@ = TREENULL;
290 @i @Term.node@ = @Expr.node@;
291 @i @Term.exprcount@ = @Expr.exprcount@ + 1;
296 @i @Term.exprcount@ = 1;
297 @i @Term.node@ = new_number(@NUM.val@, @Term.exprcount@);
303 @i @Term.exprcount@ = 1;
304 @i @Term.node@ = new_number(-1 * (@NUM.val@), @Term.exprcount@);
310 @i @Term.exprcount@ = 1;
311 @i @Term.node@ = new_param(O_ID, TREENULL, TREENULL, 0, @Term.exprcount@);
317 @c check(@Term.s@, @IDENT.name@, S_VAR|S_PARM);
318 @i @Term.exprcount@ = 1;
319 @i @Term.node@ = new_param(O_ID, TREENULL, TREENULL, tab_lookup(@Term.s@, @IDENT.name@, S_PARM) == SYMNULL ? -1 : tab_lookup(@Term.s@, @IDENT.name@, S_PARM)->param_index, @Term.exprcount@);
325 @i @Term.node@ = TREENULL;
327 /*TODO*/@i @Term.exprcount@ = 1;
330 | IDENT '(' Exprs ')'
332 @i @Term.node@ = TREENULL;
334 /*TODO*/@i @Term.exprcount@ = 1;
337 | Term '.' IDENT '(' Exprs ')'
339 @i @Term.node@ = TREENULL;
341 /*TODO*/@i @Term.exprcount@ = 1;
356 int yyerror(char *error_text)
358 fprintf(stderr,"Zeile %i: %s\n", yylineno, error_text);
362 int main(int argc, char **argv)