document 'opaque' types
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21535 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/LangRef.html b/docs/LangRef.html
index 3cf3b0e..0c5346a 100644
--- a/docs/LangRef.html
+++ b/docs/LangRef.html
@@ -39,6 +39,7 @@
<li><a href="#t_pointer">Pointer Type</a></li>
<li><a href="#t_struct">Structure Type</a></li>
<li><a href="#t_packed">Packed Type</a></li>
+ <li><a href="#t_opaque">Opaque Type</a></li>
</ol>
</li>
</ol>
@@ -750,18 +751,27 @@
<!-- _______________________________________________________________________ -->
<div class="doc_subsubsection"> <a name="t_packed">Packed Type</a> </div>
<div class="doc_text">
+
<h5>Overview:</h5>
+
<p>A packed type is a simple derived type that represents a vector
of elements. Packed types are used when multiple primitive data
are operated in parallel using a single instruction (SIMD).
A packed type requires a size (number of
elements) and an underlying primitive data type. Packed types are
considered <a href="#t_firstclass">first class</a>.</p>
+
<h5>Syntax:</h5>
-<pre> < <# elements> x <elementtype> ><br></pre>
+
+<pre>
+ < <# elements> x <elementtype> >
+</pre>
+
<p>The number of elements is a constant integer value, elementtype may
be any integral or floating point type.</p>
+
<h5>Examples:</h5>
+
<table class="layout">
<tr class="layout">
<td class="left">
@@ -778,6 +788,38 @@
</table>
</div>
+<!-- _______________________________________________________________________ -->
+<div class="doc_subsubsection"> <a name="t_opaque">Opaque Type</a> </div>
+<div class="doc_text">
+
+<h5>Overview:</h5>
+
+<p>Opaque types are used to represent unknown types in the system. This
+corresponds (for example) to the C notion of a foward declared structure type.
+In LLVM, opaque types can eventually be resolved to any type (not just a
+structure type).</p>
+
+<h5>Syntax:</h5>
+
+<pre>
+ opaque
+</pre>
+
+<h5>Examples:</h5>
+
+<table class="layout">
+ <tr class="layout">
+ <td class="left">
+ <tt>opaque</tt>
+ </td>
+ <td class="left">
+ An opaque type.<br/>
+ </td>
+ </tr>
+</table>
+</div>
+
+
<!-- *********************************************************************** -->
<div class="doc_section"> <a name="constants">Constants</a> </div>
<!-- *********************************************************************** -->