<< Initialization >>

• Before "real work", compiler has to initialize builtins and data structures.
• We now have 3 levels of initialization:
  • Real one-time initialization.
  • Initializing rtl and assembly generation, for each output file.
  • Initializing pre-defined macros and identifiers, for each top-level input file.
• Existing code tangles these together with needless interdependencies.