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 */
24 /* beschreibung der attribute
38 @attributes { char *name; } IDENT
39 @attributes { long val; } NUM
40 @attributes { struct symbol *f; int paramges; int parms; } Parms
41 @attributes { struct symbol *f; } FeldID Structdef Program
42 @attributes { struct symbol *s; } Methoddef
43 @attributes { struct symbol *s; int gparamges; } Statseq Exprs
44 @attributes { struct symbol *s; int gparamges; struct treenode *node; short imm; int exprcount; } Expr Minusterm Term
45 @attributes { struct symbol *s; int gparamges; struct treenode *node; } Lexpr Multerm Orterm Feld
46 @attributes { struct symbol *sin; int gparamges; struct symbol *sout; struct treenode *node; } Statement
48 @traversal @postorder c
49 @traversal @preorder reg
50 @traversal @postorder gen
56 @i @Program.f@ = tab_new();
57 @gen @revorder(1) printf("\t.text\n");
64 @i @Methoddef.s@ = @Program.0.f@;
65 @i @Program.1.f@ = @Program.0.f@;
68 | Structdef ';' Program
70 @i @Program.1.f@ = tab_merge(@Program.0.f@, @Structdef.f@, 1);
76 METHOD IDENT '(' Parms ')' Statseq END
79 @i @Statseq.s@ = tab_merge(@Methoddef.s@, @Parms.f@, 0);
80 @i @Statseq.gparamges@ = @Parms.paramges@;
81 @gen @revorder(1) func_header(@IDENT.name@);
88 @i @Structdef.f@ = @FeldID.f@;
93 /* lokale Vars werden in Statement in die tabelle eingefuegt */
96 @i @Parms.1.parms@ = @Parms.parms@ + 1;
97 @i @Parms.0.paramges@ = @Parms.1.paramges@;
98 @i @Parms.0.f@ = tab_add_symbol(@Parms.1.f@, @IDENT.name@, S_PARM, 1, @Parms.parms@);
103 @i @Parms.f@ = tab_new();
104 @i @Parms.paramges@ = @Parms.parms@;
111 @i @FeldID.0.f@ = tab_add_symbol(@FeldID.1.f@, @IDENT.name@, S_FIELD, 1, -1);
116 @i @FeldID.f@ = tab_new();
121 Statement ';' Statseq
123 @i @Statement.sin@ = @Statseq.0.s@;
124 @i @Statseq.1.s@ = @Statement.sout@;
125 @gen write_tree(@Statement.node@, 0); burm_label(@Statement.node@); burm_reduce(@Statement.node@, 1);
137 @i @Statement.node@ = TREENULL;
140 | VAR IDENT ASSIGN Expr
142 /* tab_clone ist hier noetig, vgl. folgendes statement
143 * > var x := x - 1; */
144 @i @Statement.sout@ = tab_add_symbol(tab_clone(@Statement.sin@), @IDENT.name@, S_VAR, 1, -1);
146 @i @Statement.node@ = TREENULL;
153 @i @Statement.node@ = TREENULL;
156 | IF Expr THEN Statseq END
160 xxputsin(@Statseq.s@,)
161 @i @Statement.node@ = TREENULL;
164 | IF Expr THEN Statseq ELSE Statseq END
168 xxputsin(@Statseq.0.s@,)
169 xxputsin(@Statseq.1.s@,)
170 @i @Statement.node@ = TREENULL;
173 | WHILE Expr DO Statseq END
177 xxputsin(@Statseq.s@,)
178 @i @Statement.node@ = TREENULL;
185 @i @Statement.node@ = new_node(O_RET, @Expr.node@, TREENULL, 0);
186 @reg @Statement.node@->reg = next_reg((char *)NULL, 0, @Expr.gparamges@); @Expr.node@->reg = @Statement.node@->reg;
193 @i @Lexpr.node@ = TREENULL;
194 @c check(@Lexpr.s@, @IDENT.name@, S_VAR|S_PARM);
202 @c check(@Feld.s@, @IDENT.name@, S_FIELD);
203 @i @Feld.node@ = TREENULL;
210 @reg @Term.node@->reg = @Expr.node@->reg;
211 @i @Expr.exprcount@ = 1 + @Term.exprcount@; fprintf(stderr, "(Expr)- Term\n");
216 @i @Expr.node@ = TREENULL;
217 @i @Expr.exprcount@ = 1 + @Term.exprcount@; fprintf(stderr, "(Expr)- NOT Term\n");
222 @i @Expr.exprcount@ = 1 + @Term.exprcount@ + @Minusterm.exprcount@; fprintf(stderr, "(Expr)- Term Minusterm\n");
223 @i @Expr.node@ = new_node(O_SUB, @Minusterm.node@, @Term.node@, @Expr.exprcount@);
224 @i @Expr.imm@ = @Term.imm@ && @Minusterm.imm@;
228 @Term.node@->reg = @Expr.node@->reg;
229 @Term.node@->skip = 1;
230 @Minusterm.node@->reg = next_reg(@Term.node@->reg, @Expr.node@->skip, @Expr.gparamges@);
236 @i @Expr.node@ = TREENULL;
237 @i @Expr.exprcount@ = 1 + @Term.exprcount@; fprintf(stderr, "(Expr)- Term Multerm\n");
242 @i @Expr.node@ = TREENULL;
243 @i @Expr.exprcount@ = 1 + @Term.exprcount@; fprintf(stderr, "(Expr)- Term OrTerm\n");
248 @i @Expr.node@ = TREENULL;
249 /* das is bloedsinn atm */ @i @Expr.imm@ = @Term.0.imm@ && @Term.1.imm@;
250 @i @Expr.exprcount@ = 1 + @Term.0.exprcount@ + @Term.1.exprcount@; fprintf(stderr, "(Expr)- Term < Term\n");
255 @i @Expr.node@ = TREENULL;
256 /* das is bloedsinn atm */ @i @Expr.imm@ = @Term.0.imm@ && @Term.1.imm@;
257 @i @Expr.exprcount@ = 1 + @Term.0.exprcount@ + @Term.1.exprcount@; fprintf(stderr, "(Expr)- Term = Term\n");
264 @i @Minusterm.0.exprcount@ = 1 + @Term.exprcount@ + @Minusterm.1.exprcount@; fprintf(stderr, "(Minusterm)- - Term Minusterm\n");
265 @i @Minusterm.node@ = new_node(O_ADD, @Minusterm.1.node@, @Term.node@, @Minusterm.0.exprcount@);
266 @i @Minusterm.imm@ = @Term.imm@ && @Minusterm.1.imm@;
269 @Minusterm.1.node@->reg = @Minusterm.node@->reg;
270 @Term.node@->reg = next_reg(@Minusterm.1.node@->reg, @Minusterm.node@->skip, @Minusterm.gparamges@);
276 @i @Minusterm.exprcount@ = 1 + @Term.exprcount@; fprintf(stderr, "(Minusterm)- - Term\n");
277 @reg @Term.node@->reg = @Minusterm.node@->reg;
284 @i @Multerm.node@ = TREENULL;
289 @i @Multerm.node@ = TREENULL;
296 @i @Orterm.node@ = TREENULL;
300 @i @Orterm.node@ = TREENULL;
308 @i @Term.node@ = @Expr.node@;
309 @i @Term.exprcount@ = @Expr.exprcount@ + 1; fprintf(stderr, "(Term)- ( Expr )\n");
314 @i @Term.exprcount@ = 1; fprintf(stderr, "(Term)- NUM\n");
315 @i @Term.node@ = new_number(@NUM.val@, @Term.exprcount@);
321 @i @Term.exprcount@ = 1; fprintf(stderr, "(Term)- - NUM\n");
322 @i @Term.node@ = new_number(-1 * (@NUM.val@), @Term.exprcount@);
328 @i @Term.exprcount@ = 1; fprintf(stderr, "(Term)- THIS\n");
329 @i @Term.node@ = new_param(O_ID, strdup("this"), TREENULL, TREENULL, 0, @Term.exprcount@);
335 @c check(@Term.s@, @IDENT.name@, S_VAR|S_PARM);
336 @i @Term.exprcount@ = 1; fprintf(stderr, "(Term)- IDENT\n");
337 @i @Term.node@ = new_param(O_ID, @IDENT.name@, TREENULL, TREENULL, tab_lookup(@Term.s@, @IDENT.name@, S_PARM) == SYMNULL ? -1 : tab_lookup(@Term.s@, @IDENT.name@, S_PARM)->param_index, @Term.exprcount@);
343 @i @Term.node@ = TREENULL;
345 /*TODO*/@i @Term.exprcount@ = 1;
348 | IDENT '(' Exprs ')'
350 @i @Term.node@ = TREENULL;
352 /*TODO*/@i @Term.exprcount@ = 1;
355 | Term '.' IDENT '(' Exprs ')'
357 @i @Term.node@ = TREENULL;
359 /*TODO*/@i @Term.exprcount@ = 1;
374 int yyerror(char *error_text)
376 fprintf(stderr,"Zeile %i: %s\n", yylineno, error_text);
380 int main(int argc, char **argv)