Function write

Compiler/allocator.py:327–334

(reg, n)

                used_from_scope.add(dup)

    def write(reg, n):
        if last_def[reg] != -1:
            print('Warning: double write at register', reg)
            print('\tline %d: %s' % (n, instr))
            print('\ttrace: %s' % format_trace(instr.caller, '\t\t'))
            if options.stop:
                sys.exit(1)
        last_def[reg] = n

    for n,instr in enumerate(block.instructions):
        outputs,inputs = instr.get_def(), instr.get_used()