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Add metadata example.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97764 91177308-0d34-0410-b5e6-96231b3b80d8
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Devang Patel 2010-03-04 23:44:48 +00:00
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docs/LangRef.html
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@ -2520,6 +2520,23 @@ call void asm alignstack "eieio", ""()
metadata nodes, which can be looked up in the module symbol table. For
example: "<tt>!foo = metadata !{!4, !3}</tt>".
<p>Metadata can be used as function arguments. Here <tt>llvm.dbg.value</tt>
function is using two metadata arguments.
<div class="doc_code">
<pre>
call void @llvm.dbg.value(metadata !24, i64 0, metadata !25)
</pre>
</div></p>
<p>Metadata can be attached with an instruction. Here metadata <tt>!21</tt> is
attached with <tt>add</tt> instruction using <tt>!dbg</tt> identifier.
<div class="doc_code">
<pre>
%indvar.next = add i64 %indvar, 1, !dbg !21
</pre>
</div></p>
</div>