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<title>The GHC Commentary - Other Sources of Wisdom</title>
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<h1>Other Sources of Wisdom</h1>
<p>
Believe it or not, but there are other people besides you who are
masochistic enough to study the innards of the beast. Some of the have
been kind (or cruel?) enough to share their insights with us. Here is a
probably incomplete list:
<p>
<ul>
<li>The <a
href="http://www.cee.hw.ac.uk/~dsg/gph/docs/StgSurvival.ps.gz">STG
Survival Sheet</a> has -- according to its header -- been written by
`a poor wee soul',<sup><a href="#footnote1">1</a></sup> which
probably has been pushed into the torments of madness by the very
act of contemplating the inner workings of the STG runtime system.
This document discusses GHC's runtime system with a focus on
support for parallel processing (aka GUM).
<li>Instructions on <a
href="http://www-users.cs.york.ac.uk/~olaf/PUBLICATIONS/extendGHC.html">Adding
an Optimisation Pass to the Glasgow Haskell Compiler</a>
have been compiled by <a
href="http://www-users.cs.york.ac.uk/~olaf/">Olaf Chitil</a>.
Unfortunately, this document is already a little aged.
<li><a href="http://www.cs.pdx.edu/~apt/">Andrew Tolmach</a> has defined
<a href="http://www.haskell.org/ghc/docs/papers/core.ps.gz">an external
representation of
GHC's <em>Core</em> language</a> and also implemented a GHC pass
that emits the intermediate form into <code>.hcr</code> files. The
option <code>-fext-core</code> triggers GHC to emit Core code after
optimisation; in addition, <code>-fno-code</code> is often used to
stop compilation after Core has been emitted.
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<p><hr><p>
<sup><a name="footnote1">1</a></sup>Usually reliable sources have it that
the poor soul in question is no one less than GUM hardcore hacker <a
href="http://www.cee.hw.ac.uk/~hwloidl/">Hans-Wolfgang Loidl</a>.
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Last modified: Tue Nov 13 10:56:57 EST 2001
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