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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@43247 91177308-0d34-0410-b5e6-96231b3b80d8
79 lines
2.3 KiB
HTML
79 lines
2.3 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
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"http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<title>Kaleidoscope: Adding JIT and Optimizer Support</title>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
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<meta name="author" content="Chris Lattner">
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<link rel="stylesheet" href="../llvm.css" type="text/css">
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</head>
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<body>
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<div class="doc_title">Kaleidoscope: Adding JIT and Optimizer Support</div>
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<div class="doc_author">
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<p>Written by <a href="mailto:sabre@nondot.org">Chris Lattner</a></p>
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</div>
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<!-- *********************************************************************** -->
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<div class="doc_section"><a name="intro">Part 4 Introduction</a></div>
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<!-- *********************************************************************** -->
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<div class="doc_text">
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<p>Welcome to part 4 of the "<a href="index.html">Implementing a language with
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LLVM</a>" tutorial.</p>
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</div>
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<!-- *********************************************************************** -->
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<div class="doc_section"><a name="basics">Code Generation setup</a></div>
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<div class="doc_text">
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<p>
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In order to generate LLVM IR, we want some simple setup to get started. First,
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we define virtual codegen methods in each AST class:</p>
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<div class="doc_code">
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<pre>
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/// ExprAST - Base class for all expression nodes.
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class ExprAST {
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public:
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virtual ~ExprAST() {}
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virtual Value *Codegen() = 0;
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};
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/// NumberExprAST - Expression class for numeric literals like "1.0".
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class NumberExprAST : public ExprAST {
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double Val;
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public:
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explicit NumberExprAST(double val) : Val(val) {}
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virtual Value *Codegen();
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};
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...
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</pre>
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</div>
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</div>
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<!-- *********************************************************************** -->
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<hr>
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<address>
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<a href="http://jigsaw.w3.org/css-validator/check/referer"><img
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src="http://jigsaw.w3.org/css-validator/images/vcss" alt="Valid CSS!"></a>
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<a href="http://validator.w3.org/check/referer"><img
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src="http://www.w3.org/Icons/valid-html401" alt="Valid HTML 4.01!"></a>
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<a href="mailto:sabre@nondot.org">Chris Lattner</a><br>
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<a href="http://llvm.org">The LLVM Compiler Infrastructure</a><br>
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Last modified: $Date: 2007-10-17 11:05:13 -0700 (Wed, 17 Oct 2007) $
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</address>
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</body>
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</html>
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