Compilers: Principles and Practice by Pearson

Syntax-directed Translation 163

| VAR {$$ = $1; printf("AST: %s\n", name($1));

printf("MAT%d: LD %s T%d --\n", ++mcount,name($1),

++tcount);tpush(tcount);}

| IVAR {$$ = $1; printf("AST: %s\n", name($1);

printf("MAT%d: LD %s T%d --\n", ++mcount,name($1),

++tcount);tpush(tcount);}

| expr ’+’ expr { printf("AST: +\n"); $$ = $3;

printf("MAT%d: ADD T%d T%d T%d\n", ++mcount, tpop(), tpop(),

++tcount);tpush(tcount);}

| expr ’-’ expr { printf("AST: -\n"); $$ = $3;

printf("MAT%d: SUB T%d T%d T%d\n", ++mcount, tpop(), tpop(),

++tcount) ;tpush(tcount);}

| expr ’*’ expr { printf("AST: *\n"); $$ = $3;

printf("MAT%d: MUL T%d T%d T%d\n", ++mcount, tpop(), ...