Add documentation for llvm.dbg.value intrinsic

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93203 91177308-0d34-0410-b5e6-96231b3b80d8

docs/SourceLevelDebugging.html

@@ -38,6 +38,7 @@
     <li><a href="#format_common_intrinsics">Debugger intrinsic functions</a>
       <ul>
       <li><a href="#format_common_declare">llvm.dbg.declare</a></li>
+      <li><a href="#format_common_value">llvm.dbg.value</a></li>
     </ul></li>
   </ol></li>
   <li><a href="#format_common_lifetime">Object lifetimes and scoping</a></li>
@@ -774,6 +775,25 @@ DW_TAG_return_variable = 258
 
 </div>
 
+<!-- ======================================================================= -->
+<div class="doc_subsubsection">
+  <a name="format_common_value">llvm.dbg.value</a>
+</div>
+
+<div class="doc_text">
+<pre>
+  void %<a href="#format_common_value">llvm.dbg.value</a>( metadata, i64, metadata )
+</pre>
+
+<p>This intrinsic provides information when a user source variable is set to a
+   new value.  The first argument is the new value (wrapped as metadata).  The
+   second argument is the offset in the user source variable where the new value
+   is written.  The third argument is
+   the <tt>%<a href="#format_variables">llvm.dbg.variable</a></tt> containing
+   the description of the user source variable. </p>
+
+</div>
+
 <!-- ======================================================================= -->
 <div class="doc_subsection">
   <a name="format_common_lifetime">Object lifetimes and scoping</a>