finite automaton, 18, 21-30 deterministic, 22 minimization, 36 nondeterministic, 24 converting to DFA, 27 FIRST set, 47-52, 63 fixed point, 48, 206, 357, 374 least, 209, 218, 368, 419 Flex, 34 flow graph, 203 reducible, 377 flow, data, see dataflow FlowGraph module, 215 FOLLOW set, 48-50, 52, 54, 62 forward reference, see recursion, mutual forwarding, 265-268 fragmentation, 261 frame, see activation record Frame module, 127, 251 frame pointer, 118-120, 134, 143, 155, 197- 198 on Pentium, 188 freeze, 224, 233, 239 function dead, 312 higher-order, 117, 298 integration, see inline expansion leaf, 122 nested, 117-118, 124-126, 131, 135, 155, 298, 301-302, 369 functional intermediate form, 430-435 functional programming, 12, 104, 298-334, see also side effect impure, 299-301 pure, 302-308 symbol tables, 107-108 functional unit, 441, 442 multiple, 442