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Add a note about registering the backend so it's available in LLC and LLI

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19168 91177308-0d34-0410-b5e6-96231b3b80d8
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Misha Brukman 2004-12-27 19:05:16 +00:00
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docs/WritingAnLLVMBackend.html
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@ -91,6 +91,18 @@ implement the following:</p>
href="CodeGenerator.html#targetmachine">TargetMachine</a></tt>, which href="CodeGenerator.html#targetmachine">TargetMachine</a></tt>, which
configures <tt><a href="CodeGenerator.html#targetdata">TargetData</a></tt> configures <tt><a href="CodeGenerator.html#targetdata">TargetData</a></tt>
correctly</li> correctly</li>
<li>Register your new target using the <tt>RegisterTarget</tt>
template:<br><br>
<div class="doc_code"><pre>
RegisterTarget&lt;<em>MyTargetMachine</em>&gt; M("short_name", " Target name");
</pre></div>
<br>Here, <em>MyTargetMachine</em> is the name of your implemented
subclass of <tt><a
href="CodeGenerator.html#targetmachine">TargetMachine</a></tt>,
<em>short_name</em> is the option that will be active following
<tt>-march=</tt> to select a target in llc and lli, and the last string
is the description of your target to appear in <tt>-help</tt>
listing.</li>
</ul></li> </ul></li>
<li>Implement the assembly printer for the architecture. Usually, if you have <li>Implement the assembly printer for the architecture. Usually, if you have
described the instruction set with the assembly printer generator in mind, that described the instruction set with the assembly printer generator in mind, that