Online tutorials/explanations on code generation?

Hi all,


I allready wrote several (small) interpreters, VMs, and
coded in assembly for several CPUs.


Next thing I'd like to try, is writing an compiler.


Of course I could build something that somehow outputs
assembly. But i'd like to have a quick overview of whats
the "usual" method of doing this elegantly, and retargetable.
(and I'd like to avoid browsing through such a beast as the
GCC sources for that, or buying a book)


So, can someone recommend a free site that highlights what
happens between "fully parsed code" and "assembly output" -
How opcodes, registers, addressing modes etc. are choosen.


                                              thanks a lot,
--
                                                                      Andreas
[What ever happened to the quaint practice of checking books out of
the library? -John]

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