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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
parent da12bdcf22
commit 93d416f060
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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
configures <tt><a href="CodeGenerator.html#targetdata">TargetData</a></tt>
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>
<li>Implement the assembly printer for the architecture. Usually, if you have
described the instruction set with the assembly printer generator in mind, that