Semantic Stack Processing 17 of 24

For each variable name, we will place a record into the symbol table, which is organized as a hash table. Information about the new variable is entered into this record. Its type is represented by a pointer to a type descriptor. We use a tag field to mark this entry as a variable. Variables also need addresses and a bit of other information. Here the 1 indicates that the variable is global, and the 8 gives an offset relative to a register defining the global data block.