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+<head>
+ <title>Kaleidoscope: Adding JIT and Optimizer Support</title>
+ <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
+ <meta name="author" content="Chris Lattner">
+ <link rel="stylesheet" href="../llvm.css" type="text/css">
+</head>
+
+<body>
+
+<div class="doc_title">Kaleidoscope: Adding JIT and Optimizer Support</div>
+
+<div class="doc_author">
+ <p>Written by <a href="mailto:sabre@nondot.org">Chris Lattner</a></p>
+</div>
+
+<!-- *********************************************************************** -->
+<div class="doc_section"><a name="intro">Part 4 Introduction</a></div>
+<!-- *********************************************************************** -->
+
+<div class="doc_text">
+
+<p>Welcome to part 4 of the "<a href="index.html">Implementing a language with
+LLVM</a>" tutorial.</p>
+
+</div>
+
+<!-- *********************************************************************** -->
+<div class="doc_section"><a name="basics">Code Generation setup</a></div>
+<!-- *********************************************************************** -->
+
+<div class="doc_text">
+
+<p>
+In order to generate LLVM IR, we want some simple setup to get started. First,
+we define virtual codegen methods in each AST class:</p>
+
+<div class="doc_code">
+<pre>
+/// ExprAST - Base class for all expression nodes.
+class ExprAST {
+public:
+ virtual ~ExprAST() {}
+ virtual Value *Codegen() = 0;
+};
+
+/// NumberExprAST - Expression class for numeric literals like "1.0".
+class NumberExprAST : public ExprAST {
+ double Val;
+public:
+ explicit NumberExprAST(double val) : Val(val) {}
+ virtual Value *Codegen();
+};
+...
+</pre>
+</div>
+
+
+
+</div>
+
+<!-- *********************************************************************** -->
+<hr>
+<address>
+ <a href="http://jigsaw.w3.org/css-validator/check/referer"><img
+ src="http://jigsaw.w3.org/css-validator/images/vcss" alt="Valid CSS!"></a>
+ <a href="http://validator.w3.org/check/referer"><img
+ src="http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01!" /></a>
+
+ <a href="mailto:sabre@nondot.org">Chris Lattner</a><br>
+ <a href="http://llvm.org">The LLVM Compiler Infrastructure</a><br>
+ Last modified: $Date: 2007-10-17 11:05:13 -0700 (Wed, 17 Oct 2007) $
+</address>
+</body>
+</html>
<ol>
<li><a href="LangImpl1.html">The basic language, with its lexer</a></li>
<li><a href="LangImpl2.html">Implementing a Parser and AST</a></li>
- <li><a href="LangImpl3.html">Implementing code generation to LLVM IR</a></li>
- <li>Adding JIT codegen support</li>
+ <li><a href="LangImpl3.html">Implementing Code Generation to LLVM IR</a></li>
+ <li><a href="LangImpl4.html">Adding JIT and Optimizer Support</a></li>
<li>Extending the language: if/then/else</li>
<li>Extending the language: operator overloading</li>
<li>Extending the language: mutable variables</li>
</ol></li>
<li>Advanced Topics
<ol>
- <li><a href="http://llvm.org/pubs/2004-09-22-LCPCLLVMTutorial.html">Writing an Optimization for LLVM</a></li>
+ <li><a href="http://llvm.org/pubs/2004-09-22-LCPCLLVMTutorial.html">Writing
+ an Optimization for LLVM</a></li>
</ol></li>
</ol>
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