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add a skeleton for part 4

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43246 91177308-0d34-0410-b5e6-96231b3b80d8
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Chris Lattner 2007-10-23 06:27:55 +00:00
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">
<html>
<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>

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<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>
@ -38,7 +38,8 @@
</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>