update analyzer doc.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@68773 91177308-0d34-0410-b5e6-96231b3b80d8
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@@ -107,6 +107,24 @@
<p>Thus we need to canonicalize the MemRegion which is used in binding and
retrieving.</p>
+<h3>Regions</h3>
+<p>Region is the entity used to model pointer values. A Region has the following
+properties:</p>
+
+<ul>
+<li>Kind</li>
+
+<li>ObjectType: the type of the object residing on the region.</li>
+
+<li>LocationType: the type of the pointer value that the region corresponds to.
+ Usually this is the pointer to the ObjectType. But sometimes we want to cache
+ this type explicitly, for example, for a CodeTextRegion.</li>
+
+<li>StartLocation</li>
+
+<li>EndLocation</li>
+</ul>
+
<h3>Symbolic Regions</h3>
<p>A symbolic region is a map of the concept of symbolic values into the domain