Re: wanted: good references for [45]86 code generation

Andrew Tucker <ast@halcyon.com> wrote ...
> Fraser and Hanson's lcc book describes their code generator for x86
> as well as MIPS and SPARC.


The techniques described by Fraser and Hanson are very useful for
creating a professional x86 code generator. Of course in a book that
is about a *portable* C compiler they didn't go into great depths
maybe, but you can look at lcc-win32 to see an expansion of their
work. I have rewritten their lburg machine description from approx 180
to 550 rules, and then the same techniques generate code that in many
benchmarks runs faster than Bolrand C5.0 for instance.


I think that in a book *explaining* things, the techniques described
MUST be simple for people to grasp. A 550 rules example would have
confused the readers. You can look at my work at
http://www;remcomp.com/lcc-win32 There you will find a ready-to-run
system that will include the source for the code generator. It is MSVC
compatible, and includes a compiler system around lcc.


The techniques of lburg can be improved (and in lcc-win32 they are)
with a peephole optimizer, as it is stated in their book. Look at the
file optim.c in there.
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