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+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" 
+          "http://www.w3.org/TR/html4/strict.dtd">
+<!-- Material used from: HTML 4.01 specs: http://www.w3.org/TR/html401/ -->
+<html>
+<head>
+  <META http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
+  <title>Hacking on clang</title>
+  <link type="text/css" rel="stylesheet" href="menu.css" />
+  <link type="text/css" rel="stylesheet" href="content.css" />
+</head>
+<body>
+<!--#include virtual="menu.html.incl"-->
+<div id="content">
+  <!--*********************************************************************-->
+  <h1>Hacking on Clang</h1>
+  <!--*********************************************************************-->
+  
+  <p>This document provides some hints for how to get started hacking
+  on Clang for developers who are new to the Clang and/or LLVM
+  codebases.
+    <ul>
+      <li><a href="#docs">Developer Documentation</a></li>
+      <li><a href="#debugging">Debugging</a></li>
+      <li><a href="#irgen">LLVM IR Generation</a></li>
+    </ul>
+  </p>
+    
+  <!--=====================================================================-->
+  <h2 id="debugging">Developer Documentation</h2>
+  <!--=====================================================================-->
+  
+  <p>Both Clang and LLVM use doxygen to provide API documentation. Their
+  respective web pages (generated nightly) are here:
+    <ul>
+      <li><a href="http://clang.llvm.org/doxygen">Clang</a></li>
+      <li><a href="http://llvm.org/doxygen">LLVM</a></li>
+    </ul>
+  </p>
+  
+  <p>For work on the LLVM IR generation, the LLVM assembly language
+  <a href="http://llvm.org/docs/LangRef.html">reference manual</a> is
+  also useful.</p>
+
+  <!--=====================================================================-->
+  <h2 id="debugging">Debugging</h2>
+  <!--=====================================================================-->
+  
+  <p>Inspecting data structures in a debugger:
+    <ul>
+      <li>Many LLVM and Clang data structures provide
+        a <tt>dump()</tt> method which will print a description of the
+        data structure to <tt>stderr</tt>.</li>
+      <li>The <a href="docs/InternalsManual.html#QualType"><tt>QualType</tt></a>
+      structure is used pervasively. This is a simple value class for
+      wrapping types with qualifiers; you can use
+      the <tt>isConstQualified()</tt>, for example, to get one of the
+      qualifiers, and the <tt>getTypePtr()</tt> method to get the
+      wrapped <tt>Type*</tt> which you can then dump.</li>
+    </ul>
+  </p>
+  
+  <!--=====================================================================-->
+  <h2 id="irgen">LLVM IR Generation</h2>
+  <!--=====================================================================-->
+
+  <p>The LLVM IR generation part of clang handles conversion of the
+    AST nodes output by the Sema module to the LLVM Intermediate
+    Representation (IR). Historically, this was referred to as
+    "codegen", and the Clang code for this lives
+    in <tt>lib/CodeGen</tt>.</p>
+  
+  <p>The output is most easily inspected using the <tt>-emit-llvm</tt>
+    option to clang (possibly in conjunction with <tt>-o -</tt>). You
+    can also use <tt>-emit-llvm-bc</tt> to write an LLVM bitcode file
+    which can be processed by the suite of LLVM tools
+    like <tt>llvm-dis</tt>, <tt>llvm-nm</tt>, etc. See the LLVM
+    <a href="http://llvm.org/docs/CommandGuide/">Command Guide</tt>
+    for more information.</p>
+
+</div>
+</body>
+</html>
diff --git a/www/menu.html.incl b/www/menu.html.incl
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     <a href="/get_involved.html">Get&nbsp;Involved</a>
     <a href="/cxx_status.html">C++ Status</a>
     <a href="/docs/InternalsManual.html">Clang&nbsp;Internals</a>
+    <a href="/hacking.html">Hacking on Clang</a>
     <a href="/performance.html">Performance</a>
   </div>