hlvm/docs/ReleasePlans.html - llvm-archive - Git at Google

 <!--#set var="title" value="Release Plans" -->
 <!--#include virtual="/incl/header.incl" -->
 <h1>HLVM Release Plans</h1>
 <div class="warning">
 WARNING: This document is <em>always</em> a work in progress.
 </div>
 <ol>
   <li><a href="#introduction">Introduction</a></li>
   <li><a href="#releases">Release Index</a>
     <ol>
       <li><a href="#upcoming">Upcoming Releases</a></li>
       <li><a href="#completed">Completed Releases</a></li>
     </ol>
   </li>
   <li><a href="#status">Release Status</a>
     <ol>
       <li><a href="#current">Current Release</a></li>
       <li><a href="#previous">Previous Releases</a></li>
     </ol>
   </li>
   <li><a href="#features">Feature Definitions</a></li>
 </ol>

 <div class="author">
   <p>Author: <a href="mailto:rspencer@reidspencer.com">Reid Spencer</a>.</p>
 </div>

 <h2><a name="introduction">Introduction</a></h2>
 <div class="text">
   <p>This document contains the Release plans for HLVM. Each release is broken
   down into a set of high-level features that we are intending to implement in
   that release. For each release, we describe the features and provide a
   completion matrix to help you track the progress.</p>
   <p>One of the reasons we publish this information is so that developers can
   see where they might be able to help. If you have an interest in implementing
   one of the features, please contact us.</p>
   <p><b class="warning">NOTE: </b>
   This document is ephemeral. We change it all the time. It gets updated
   with our current plans for the definition of a release. As such, referring
   to it often will help you understand where HLVM is going in upcoming
   releases.  However, <em>nothing</em> within these plans should be relied
   upon or taken as a committment from the developers. Open Source projects
   proceed as time and talent permits and this one is no exception. We are
   simply trying to provide you with information about what is likely to
   occur in the next few releases.</p>
 </div>

 <h2><a name="releases"></a>Release Index</h2>
 <div class="text">
   <table>
     <tr>
       <th style="width:15%">Release</th>
       <th style="width:60%">Description</th>
       <th style="width:10%">Status</th>
       <th style="width:15%">Links</th>
     </tr>
     <tr>
       <td>0.1</td>
       <td>Hello World, AST Construction, Build System</td>
       <td>100%</td>
       <td><a href="#f0_1">Features</a>&nbsp;<a href="#s0_1">Status</a></td>
     </tr>
     <tr>
       <td>0.2</td>
       <td>Turing Complete, JIT Execution</td>
       <td>55%</td>
       <td><a href="#f0_2">Features</a>&nbsp;<a href="#current">Status</a></td>
     </tr>
     <tr>
       <td>0.3</td>
       <td>Front End Library, Object Model, Interpreted Execution</td>
       <td>1%</td>
       <td><a href="#f0_3">Features</a></td>
     </tr>
     <tr>
       <td>0.4</td>
       <td>Ruby Front End</td>
       <td>0%</td>
       <td><a href="#f0_4">Features</a></td>
     </tr>
     <tr>
       <td>0.5</td>
       <td>Scheme Front End</td>
       <td>0%</td>
       <td><a href="#f0_5">Features</a></td>
     </tr>
     <tr>
       <td>0.6</td>
       <td>Python Front End</td>
       <td>0%</td>
       <td><a href="#f0_6">Features</a></td>
     </tr>
     <tr>
       <td>0.9</td>
       <td>Quality Enhancements, Pre-Beta Touchups</td>
       <td>0%</td>
       <td><a href="#f0_9">Features</a></td>
     </tr>
   </table>
 </div>

 <h2><a name="status">Release Status</a></h2>
 <div class="text">
   <p>This section provides the status for the current and previous releases.</p>
 </div>

 <h3><a name="current">Current Status (Release 0.2)</a></h3>
 <div class="text">
   <p>The table below shows the status of the current release. Click the feature
   name to get a complete description of the feature.</p>
   <table>
     <tr><th>Feature</th><th>Feature</th><th>Feature</th></tr>
     <tr>
       <td><a href="#integer">Integer Arithmetic Operators</a><br/>Done.</td>
       <td><a href="#boolean">Boolean Arithmetic Operators</a><br/>Done.</td>
       <td><a href="#floating">Floating Point Arithmetic Operators</a><br/>
         Done except for code generation to integrate with runtime.</td>
     </tr><tr>
       <td><a href="#controlflow">Control Flow Operators</a><br/>Done.</td>
       <td><a href="#blocknest">Block Nesting</a><br/>Done.</td>
       <td><a href="#aggrconst">Aggregate Constants</a><br/>Done.</td>
     </tr><tr>
     <td><a href="#textops">Text Operators</a><br/>
       String operators defined. Text operators to follow.</td>
       <td><a href="#args">Program Arguments</a><br/>Changed to argc/argv.</td>
       <td><a href="#jit">JIT Compilation</a><br/>Not Started.</td>
     </tr><tr>
       <td><a href="#tcgen">Test Case Generator</a><br/>
         85% A few generation bugs remain.</td>
       <td></td>
       <td></td>
     </tr>
   </table>
 </div>

 <h3><a name="released">Previous Releases</a></h3>
 <div class="text">
   <p>This section lists the final status information for previous releases.</p>
 </div>
 <h4><a name="s0_1">Release 0.1 (Hello World)</a></h4>
 <div class="text">
   <table>
     <tr><th>Feature</th><th>Feature</th><th>Feature</th></tr>
     <tr>
       <td><a href="#buildenv">Build Environment</a>
         <br/>SCons is working well. All targets necessary for building, testing,
         document generation, and installation are completed.
       </td>
       <td><a href="#testharn">Test Harness</a>
         <br/>Dejagnu test harness implemented with 2 types of tests based on
         available tools. This will grow as HLVM grows.
       </td>
       <td><a href="#ASTNodes">AST Nodes</a>
         <br/>61 node classes implemented. The type system is complete. More
         operators are defined than code generation permits.
       </td>
     </tr><tr>
       <td><a href="#XMLReader">XML Reader</a>
         <br/>Correctly reads and validates all 61 AST node classes implemented
         so far.
       </td>
       <td><a href="#XMLWriter">XML Writer</a>
         <br/>Correctly generates XML for all 61 AST node classes implemente so
         far.</td>
       <td><a href="#xml2xml">hlvm-xml2xml</a>
         <br/>Done. This tool will gain functionality as the XML Reader and XML
         Writer libraries implement more node types to read/write.
       </td>
     </tr><tr>
       <td><a href="#compiler">hlvm-compiler</a>
         <br/>Sufficient code generation capabilities for "Hello, World"
       </td>
       <td><a href="#vm">hlvm</a>
         <br/>Provides output for "Hello World". Provides options processing.
       </td>
       <td><a href="#ASTsuite">AST Test Suite</a>
         <br/>16 tests written in 2 categories.
       </td>
     </tr><tr>
       <td colspan="3"><a href="#HelloWorld">Hello World</a><br/>Done.</td>
     </tr>
   </table>
 </div>

 <h2><a name="features">Feature Definitions</a></h2>
 <div class="text">
   <p>This section defines the individual features for all releases.</p>
 </div>

 <h3><a name="f0_1">Release 0.1 Features (Hello World)</a></h3>
 <div class="text">
   <ol>
     <li><a name="buildenv"><em>Build Environment</em></a>.
     A multi-platform build system so software can be compiled properly.</li>
     <li><a name="testharn"><em>Test Harness</em></a>.
     A deja-gnu based test framework to manage and execute the large number of
     test cases needed to verify that the HLVM system is working correctly.</li>
     <li><a name="ASTNodes"><em>AST Nodes</em></a>.
     Define and implement several (not all) AST nodes. The most fundamental
     nodes should be implemented: structuring, functions, blocks, arithmetic
     operators, constants, etc. The list will be expanded in subsequent releases.
     </li>
     <li><a name="XMLReader"><em>XML Reader</em></a>.
     A library to read in an XML representation of the AST and generate the AST
     C++ Nodes.</li>
     <li><a name="XMLWriter"><em>XML Writer</em></a>.
     A library to write out an XML representation of the Abstract Syntax
     Tree.</li>
     <li><a name="xml2xml"><em>hlvm-xml2xml</em></a>.
     A program to convert XML AST documents back into XML. This tests the correct
     construction of the AST as well as the pass management features.</li>
     <li><a name="ASTsuite"><em>AST Test Suite</em></a>.
     A suite of XML based test files need to be developed for use with the
     hlvm_xml2xml program. All implemented aspects of the AST must be covered by
     one or more test cases.</li>
     <li><a name="compiler"><em>hlvm-compiler</em></a>.
     A program to compile HLVM sources into something executable. This release
     0.1 vesion will read in XML AST files and produce LLVM bytecode. Other
     options will be added in the future.</li>
     <li><a name="vm"><em>hlvm machine</em></a>.
     This program provides the runtime environment for executing HLVM
     programs. This 0.1 version will read an LLVM bytecode file and JIT execute
     it. More features later.</li>
     <li><a name="HelloWorld"><em>Hello World</em></a>.
     Sufficient capabilities will be added to the runtime and compiler in order
     to get the "Hello, World" program running.</li>
   </ol>
 </div>

 <h3><a name="f0_2">Release 0.2 Features (Turing Complete)</a></h3>
 <div class="text">
   <ol>
     <li><a name="integer"><em>Integer Operators</em></a>. Extend the AST
     library to support all the integer arithmetic operators
     such as add, subtract, multiply, divide, modulo, increment, decrement,
     bitwise operations, etc. Provide LLVM code generation support for these
     operators.</li>
     <li><a name="boolean"><em>Boolean Operators</em></a>. Extend the AST
     library to support all the boolean operators such as and, or, not, and
     the six comparison operators. Provide LLVM code generation support for these
     operators.</li>
     <li><a name="floating"><em>Floating Point Operators</em></a>. Extend the AST
     library to support all the floating point arithmetic operators such as add,
     subtract, multiply, divide, etc. Also include the operators that imply
     library functions or LLVM intrinsics such as sqrt, power, etc.  Provide LLVM
     code generation support for these operators.</li>
     <li><a name="controlflow"><em>Control Flow Operators</em></a>. Extend the
     AST library to support a set of control flow operators (if,while,for,switch)
     and provide LLVM code generation for them.</li>
     <li><a name="#blocknest"><em>Block Nesting</em></a><br/>Implement correct
     code generation for nested blocks, block results, function results, return
     operator, control flow operators with nested blocks, etc.</li>
     <li><a name="#aggrconst"><em>Aggregate Constants</em></a><br/>Complete the
     implementation of literal constants to include the aggregate constants for
     pointers, arrays, vectors, structures and continuations. Also implement
     literal constants for the missing simple types: enumerator, any, range,
     octet, character, etc.</li>
     <li><a name="textops"><em>Text Operators</em></a>. Extend the AST
     library to provide a complete set of operators for manipulating strings of
     text and the LLVM code generation for them.</li>
     <li><a name="validate"><em>Validate Pass</em></a>. Finish the implementation
     of the ValidatePass so that AST trees can be fully validated after
     construction.</li>
     <li><a name="args"><em>Program Arguments</em></a>. Extend the Runtime
     library to correctly pass an HLVM program's arguments as an HLVM array of
     text.</li>
     <li><a name="tcgen"><em>Test Case Generator</em></a>. Write a test case
     generator program that randomly generates test cases based on specifications
     of operator complexity, type complexity, and size. Integrate this generator
     with the dejagnu test framework to check a few random cases on each run of
     the "check" target.</li>
     <li><a name="jit"><em>JIT Compilation</em></a>. Extend the Runtime library
     to support just-in-time compilation and execution via LLVM's JIT
     facilities.</li>
   </ol>
 </div>

 <h3><a name="f0_3">Release 0.3 Features (Front End)</a></h3>
 <div class="text">
   <ol>
     <li><a name="frontend"><em>Front End Library</em></a>.
     Add a new library to make it easy to build front end languages. The library
     will assist with: lexical analysis, parsing, AST node generation, etc.</li>
     <li><a name="interp"><em>Interpreter</em></a>.
     We will introduce the HLVM interpreter in this release. It will interpret
     AST nodes directly and execute them.</li>
   </ol>
 </div>

 <h3><a name="f0_4">Release 0.4 Features (Ruby)</a></h3>
 <div class="text">
   <ol>
     <li><a name="ruby"><em>Ruby Features</em></a>.
     Add sufficient nodes to the system to support the language features of
     Ruby.</li>
     <li><a name="rubytest"><em>Ruby Tests</em></a>.
     Add test cases that exercise the features added for Ruby. These are XML
     based test cases, not Ruby source</li>
   </ol>
 </div>

 <h3><a name="f0_5">Release 0.5 Features (Scheme)</a></h3>
 <div class="text">
   <ol>
     <li><a name="scheme"><em>Scheme Features</em></a>.
     Add sufficient nodes to the system to support the language features of
     Scheme.</li>
     <li><a name="schemetest"><em>Scheme Tests</em></a>.
     Add test cases that exercise the features added for Scheme. These are XML
     based test cases, not Ruby source</li>
   </ol>
 </div>

 <h3><a name="f0_6">Release 0.6 Features (Python)</a></h3>
 <div class="text">
   <ol>
     <li><a name="python"><em>Python Features</em></a>.
     Add sufficient nodes to the system to support the language features of
     Python.</li>
     <li><a name="pythontest"><em>Python Tests</em></a>.
     Add test cases that exercise the features added for Scheme. These are XML
     based test cases, not Python source</li>
   </ol>
 </div>

 <h3><a name="f0_9">Release 0.9 Features (Quality)</a></h3>
 <div class="text">
   <ol>
     <li><a name="refactor"><em>Refactoring</em></a>.
     Review the entire HLVM source base and re-factor to common components
     with the goal of software reuse and shrinkage of library sizes.</li>
     <li><a name="fulltest"><em>Full Test Suite</em></a>.
     Ensure that HLVM is covered by a full test suite that tests every aspect of
     its functionality.</li>
     <li><a name="quality"><em>Quality</em></a>.
     Improve quality of HLVM at both compile and run times. This feature ensures
     that HLVM will properly handle corner conditions, error situations,
     exceptions, etc.</li>
     <li><a name="optimize"><em>Performance Optimization</em></a>.
     Analyze the compile and run time environments to ensure they are running at
     optimal speeds. Ensure that the generated code can be optimized to run
     efficiently.</li>
     <li><a name="docs"><em>Documentation</em></a>.
     Write sufficient documentation to cover usage of HLVM and programming with
     HLVM</li>
   </ol>
 </div>
 <!--#include virtual="/incl/footer.incl" -->
	<!--#set var="title" value="Release Plans" -->
	<!--#include virtual="/incl/header.incl" -->
	<h1>HLVM Release Plans</h1>
	<div class="warning">
	WARNING: This document is <em>always</em> a work in progress.
	</div>
	<ol>
	<li><a href="#introduction">Introduction</a></li>
	<li><a href="#releases">Release Index</a>
	<ol>
	<li><a href="#upcoming">Upcoming Releases</a></li>
	<li><a href="#completed">Completed Releases</a></li>
	</ol>
	</li>
	<li><a href="#status">Release Status</a>
	<ol>
	<li><a href="#current">Current Release</a></li>
	<li><a href="#previous">Previous Releases</a></li>
	</ol>
	</li>
	<li><a href="#features">Feature Definitions</a></li>
	</ol>

	<div class="author">
	<p>Author: <a href="mailto:rspencer@reidspencer.com">Reid Spencer</a>.</p>
	</div>

	<h2><a name="introduction">Introduction</a></h2>
	<div class="text">
	<p>This document contains the Release plans for HLVM. Each release is broken
	down into a set of high-level features that we are intending to implement in
	that release. For each release, we describe the features and provide a
	completion matrix to help you track the progress.</p>
	<p>One of the reasons we publish this information is so that developers can
	see where they might be able to help. If you have an interest in implementing
	one of the features, please contact us.</p>
	<p><b class="warning">NOTE: </b>
	This document is ephemeral. We change it all the time. It gets updated
	with our current plans for the definition of a release. As such, referring
	to it often will help you understand where HLVM is going in upcoming
	releases. However, <em>nothing</em> within these plans should be relied
	upon or taken as a committment from the developers. Open Source projects
	proceed as time and talent permits and this one is no exception. We are
	simply trying to provide you with information about what is likely to
	occur in the next few releases.</p>
	</div>

	<h2><a name="releases"></a>Release Index</h2>
	<div class="text">
	<table>
	<tr>
	<th style="width:15%">Release</th>
	<th style="width:60%">Description</th>
	<th style="width:10%">Status</th>
	<th style="width:15%">Links</th>
	</tr>
	<tr>
	<td>0.1</td>
	<td>Hello World, AST Construction, Build System</td>
	<td>100%</td>
	<td><a href="#f0_1">Features</a> <a href="#s0_1">Status</a></td>
	</tr>
	<tr>
	<td>0.2</td>
	<td>Turing Complete, JIT Execution</td>
	<td>55%</td>
	<td><a href="#f0_2">Features</a> <a href="#current">Status</a></td>
	</tr>
	<tr>
	<td>0.3</td>
	<td>Front End Library, Object Model, Interpreted Execution</td>
	<td>1%</td>
	<td><a href="#f0_3">Features</a></td>
	</tr>
	<tr>
	<td>0.4</td>
	<td>Ruby Front End</td>
	<td>0%</td>
	<td><a href="#f0_4">Features</a></td>
	</tr>
	<tr>
	<td>0.5</td>
	<td>Scheme Front End</td>
	<td>0%</td>
	<td><a href="#f0_5">Features</a></td>
	</tr>
	<tr>
	<td>0.6</td>
	<td>Python Front End</td>
	<td>0%</td>
	<td><a href="#f0_6">Features</a></td>
	</tr>
	<tr>
	<td>0.9</td>
	<td>Quality Enhancements, Pre-Beta Touchups</td>
	<td>0%</td>
	<td><a href="#f0_9">Features</a></td>
	</tr>
	</table>
	</div>

	<h2><a name="status">Release Status</a></h2>
	<div class="text">
	<p>This section provides the status for the current and previous releases.</p>
	</div>

	<h3><a name="current">Current Status (Release 0.2)</a></h3>
	<div class="text">
	<p>The table below shows the status of the current release. Click the feature
	name to get a complete description of the feature.</p>
	<table>
	<tr><th>Feature</th><th>Feature</th><th>Feature</th></tr>
	<tr>
	<td><a href="#integer">Integer Arithmetic Operators</a><br/>Done.</td>
	<td><a href="#boolean">Boolean Arithmetic Operators</a><br/>Done.</td>
	<td><a href="#floating">Floating Point Arithmetic Operators</a><br/>
	Done except for code generation to integrate with runtime.</td>
	</tr><tr>
	<td><a href="#controlflow">Control Flow Operators</a><br/>Done.</td>
	<td><a href="#blocknest">Block Nesting</a><br/>Done.</td>
	<td><a href="#aggrconst">Aggregate Constants</a><br/>Done.</td>
	</tr><tr>
	<td><a href="#textops">Text Operators</a><br/>
	String operators defined. Text operators to follow.</td>
	<td><a href="#args">Program Arguments</a><br/>Changed to argc/argv.</td>
	<td><a href="#jit">JIT Compilation</a><br/>Not Started.</td>
	</tr><tr>
	<td><a href="#tcgen">Test Case Generator</a><br/>
	85% A few generation bugs remain.</td>
	<td></td>
	<td></td>
	</tr>
	</table>
	</div>

	<h3><a name="released">Previous Releases</a></h3>
	<div class="text">
	<p>This section lists the final status information for previous releases.</p>
	</div>
	<h4><a name="s0_1">Release 0.1 (Hello World)</a></h4>
	<div class="text">
	<table>
	<tr><th>Feature</th><th>Feature</th><th>Feature</th></tr>
	<tr>
	<td><a href="#buildenv">Build Environment</a>
	<br/>SCons is working well. All targets necessary for building, testing,
	document generation, and installation are completed.
	</td>
	<td><a href="#testharn">Test Harness</a>
	<br/>Dejagnu test harness implemented with 2 types of tests based on
	available tools. This will grow as HLVM grows.
	</td>
	<td><a href="#ASTNodes">AST Nodes</a>
	<br/>61 node classes implemented. The type system is complete. More
	operators are defined than code generation permits.
	</td>
	</tr><tr>
	<td><a href="#XMLReader">XML Reader</a>
	<br/>Correctly reads and validates all 61 AST node classes implemented
	so far.
	</td>
	<td><a href="#XMLWriter">XML Writer</a>
	<br/>Correctly generates XML for all 61 AST node classes implemente so
	far.</td>
	<td><a href="#xml2xml">hlvm-xml2xml</a>
	<br/>Done. This tool will gain functionality as the XML Reader and XML
	Writer libraries implement more node types to read/write.
	</td>
	</tr><tr>
	<td><a href="#compiler">hlvm-compiler</a>
	<br/>Sufficient code generation capabilities for "Hello, World"
	</td>
	<td><a href="#vm">hlvm</a>
	<br/>Provides output for "Hello World". Provides options processing.
	</td>
	<td><a href="#ASTsuite">AST Test Suite</a>
	<br/>16 tests written in 2 categories.
	</td>
	</tr><tr>
	<td colspan="3"><a href="#HelloWorld">Hello World</a><br/>Done.</td>
	</tr>
	</table>
	</div>

	<h2><a name="features">Feature Definitions</a></h2>
	<div class="text">
	<p>This section defines the individual features for all releases.</p>
	</div>

	<h3><a name="f0_1">Release 0.1 Features (Hello World)</a></h3>
	<div class="text">
	<ol>
	<li><a name="buildenv"><em>Build Environment</em></a>.
	A multi-platform build system so software can be compiled properly.</li>
	<li><a name="testharn"><em>Test Harness</em></a>.
	A deja-gnu based test framework to manage and execute the large number of
	test cases needed to verify that the HLVM system is working correctly.</li>
	<li><a name="ASTNodes"><em>AST Nodes</em></a>.
	Define and implement several (not all) AST nodes. The most fundamental
	nodes should be implemented: structuring, functions, blocks, arithmetic
	operators, constants, etc. The list will be expanded in subsequent releases.
	</li>
	<li><a name="XMLReader"><em>XML Reader</em></a>.
	A library to read in an XML representation of the AST and generate the AST
	C++ Nodes.</li>
	<li><a name="XMLWriter"><em>XML Writer</em></a>.
	A library to write out an XML representation of the Abstract Syntax
	Tree.</li>
	<li><a name="xml2xml"><em>hlvm-xml2xml</em></a>.
	A program to convert XML AST documents back into XML. This tests the correct
	construction of the AST as well as the pass management features.</li>
	<li><a name="ASTsuite"><em>AST Test Suite</em></a>.
	A suite of XML based test files need to be developed for use with the
	hlvm_xml2xml program. All implemented aspects of the AST must be covered by
	one or more test cases.</li>
	<li><a name="compiler"><em>hlvm-compiler</em></a>.
	A program to compile HLVM sources into something executable. This release
	0.1 vesion will read in XML AST files and produce LLVM bytecode. Other
	options will be added in the future.</li>
	<li><a name="vm"><em>hlvm machine</em></a>.
	This program provides the runtime environment for executing HLVM
	programs. This 0.1 version will read an LLVM bytecode file and JIT execute
	it. More features later.</li>
	<li><a name="HelloWorld"><em>Hello World</em></a>.
	Sufficient capabilities will be added to the runtime and compiler in order
	to get the "Hello, World" program running.</li>
	</ol>
	</div>

	<h3><a name="f0_2">Release 0.2 Features (Turing Complete)</a></h3>
	<div class="text">
	<ol>
	<li><a name="integer"><em>Integer Operators</em></a>. Extend the AST
	library to support all the integer arithmetic operators
	such as add, subtract, multiply, divide, modulo, increment, decrement,
	bitwise operations, etc. Provide LLVM code generation support for these
	operators.</li>
	<li><a name="boolean"><em>Boolean Operators</em></a>. Extend the AST
	library to support all the boolean operators such as and, or, not, and
	the six comparison operators. Provide LLVM code generation support for these
	operators.</li>
	<li><a name="floating"><em>Floating Point Operators</em></a>. Extend the AST
	library to support all the floating point arithmetic operators such as add,
	subtract, multiply, divide, etc. Also include the operators that imply
	library functions or LLVM intrinsics such as sqrt, power, etc. Provide LLVM
	code generation support for these operators.</li>
	<li><a name="controlflow"><em>Control Flow Operators</em></a>. Extend the
	AST library to support a set of control flow operators (if,while,for,switch)
	and provide LLVM code generation for them.</li>
	<li><a name="#blocknest"><em>Block Nesting</em></a><br/>Implement correct
	code generation for nested blocks, block results, function results, return
	operator, control flow operators with nested blocks, etc.</li>
	<li><a name="#aggrconst"><em>Aggregate Constants</em></a><br/>Complete the
	implementation of literal constants to include the aggregate constants for
	pointers, arrays, vectors, structures and continuations. Also implement
	literal constants for the missing simple types: enumerator, any, range,
	octet, character, etc.</li>
	<li><a name="textops"><em>Text Operators</em></a>. Extend the AST
	library to provide a complete set of operators for manipulating strings of
	text and the LLVM code generation for them.</li>
	<li><a name="validate"><em>Validate Pass</em></a>. Finish the implementation
	of the ValidatePass so that AST trees can be fully validated after
	construction.</li>
	<li><a name="args"><em>Program Arguments</em></a>. Extend the Runtime
	library to correctly pass an HLVM program's arguments as an HLVM array of
	text.</li>
	<li><a name="tcgen"><em>Test Case Generator</em></a>. Write a test case
	generator program that randomly generates test cases based on specifications
	of operator complexity, type complexity, and size. Integrate this generator
	with the dejagnu test framework to check a few random cases on each run of
	the "check" target.</li>
	<li><a name="jit"><em>JIT Compilation</em></a>. Extend the Runtime library
	to support just-in-time compilation and execution via LLVM's JIT
	facilities.</li>
	</ol>
	</div>

	<h3><a name="f0_3">Release 0.3 Features (Front End)</a></h3>
	<div class="text">
	<ol>
	<li><a name="frontend"><em>Front End Library</em></a>.
	Add a new library to make it easy to build front end languages. The library
	will assist with: lexical analysis, parsing, AST node generation, etc.</li>
	<li><a name="interp"><em>Interpreter</em></a>.
	We will introduce the HLVM interpreter in this release. It will interpret
	AST nodes directly and execute them.</li>
	</ol>
	</div>

	<h3><a name="f0_4">Release 0.4 Features (Ruby)</a></h3>
	<div class="text">
	<ol>
	<li><a name="ruby"><em>Ruby Features</em></a>.
	Add sufficient nodes to the system to support the language features of
	Ruby.</li>
	<li><a name="rubytest"><em>Ruby Tests</em></a>.
	Add test cases that exercise the features added for Ruby. These are XML
	based test cases, not Ruby source</li>
	</ol>
	</div>

	<h3><a name="f0_5">Release 0.5 Features (Scheme)</a></h3>
	<div class="text">
	<ol>
	<li><a name="scheme"><em>Scheme Features</em></a>.
	Add sufficient nodes to the system to support the language features of
	Scheme.</li>
	<li><a name="schemetest"><em>Scheme Tests</em></a>.
	Add test cases that exercise the features added for Scheme. These are XML
	based test cases, not Ruby source</li>
	</ol>
	</div>

	<h3><a name="f0_6">Release 0.6 Features (Python)</a></h3>
	<div class="text">
	<ol>
	<li><a name="python"><em>Python Features</em></a>.
	Add sufficient nodes to the system to support the language features of
	Python.</li>
	<li><a name="pythontest"><em>Python Tests</em></a>.
	Add test cases that exercise the features added for Scheme. These are XML
	based test cases, not Python source</li>
	</ol>
	</div>

	<h3><a name="f0_9">Release 0.9 Features (Quality)</a></h3>
	<div class="text">
	<ol>
	<li><a name="refactor"><em>Refactoring</em></a>.
	Review the entire HLVM source base and re-factor to common components
	with the goal of software reuse and shrinkage of library sizes.</li>
	<li><a name="fulltest"><em>Full Test Suite</em></a>.
	Ensure that HLVM is covered by a full test suite that tests every aspect of
	its functionality.</li>
	<li><a name="quality"><em>Quality</em></a>.
	Improve quality of HLVM at both compile and run times. This feature ensures
	that HLVM will properly handle corner conditions, error situations,
	exceptions, etc.</li>
	<li><a name="optimize"><em>Performance Optimization</em></a>.
	Analyze the compile and run time environments to ensure they are running at
	optimal speeds. Ensure that the generated code can be optimized to run
	efficiently.</li>
	<li><a name="docs"><em>Documentation</em></a>.
	Write sufficient documentation to cover usage of HLVM and programming with
	HLVM</li>
	</ol>
	</div>
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