elna/TODO

# Intermediate code generation

- To access named parameters inside a procedure, IR should be able to reference
  them. During the generation the needed information (e.g. offsets or registers)
  can be extracted from the symbol table and saved in the operands.
- Glue always generates the same intermediate variable (LocalVariable 0) for
  local variables. (LocalVariable 0) is handled the same as temporary variables
  that are currently saved only in registers. There space on the stack allocated
  for local variables.

# ELF generation

- Don't ignore relocations where the symbol is not defined in the symbol table.
  Report an error about an undefined symbol.

# Register allocation

- Each temporary variable gets a tn register where n is the variable index. If
  there more variables the allocation will fail with out of bounds runtime
  error. Implement spill over.
- The allocator puts temporary and local variables into the same registers,
  causing conflicts.

# Language

- Array support.