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<link title="Dominators" rel="Chapter" href="Dominators.html"><title>CIL API Documentation (version 1.3.7) : Dataflow</title>
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<center><h1>Module <a href="type_Dataflow.html">Dataflow</a></h1></center>
<br>
<pre><span class="keyword">module</span> Dataflow: <code class="code">sig</code> <a href="Dataflow.html">..</a> <code class="code">end</code></pre>A framework for data flow analysis for CIL code.  Before using 
    this framework, you must initialize the Control-flow Graph for your
    program, e.g using <a href="Cfg.html#VALcomputeFileCFG"><code class="code">Cfg.computeFileCFG</code></a><br>
<hr width="100%">
<br><code><span class="keyword">type</span> <a name="TYPEaction"></a><code class="type">'a</code> action = </code><table class="typetable">
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">Default</span></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >The default action</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr>
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">Done</span> <span class="keyword">of</span> <code class="type">'a</code></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >Do not do the default action. Use this result</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr>
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">Post</span> <span class="keyword">of</span> <code class="type">('a -> 'a)</code></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >The default action, followed by the given 
 transformer</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr></table>


<br><code><span class="keyword">type</span> <a name="TYPEstmtaction"></a><code class="type">'a</code> stmtaction = </code><table class="typetable">
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">SDefault</span></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >The default action</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr>
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">SDone</span></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >Do not visit this statement or its successors</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr>
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">SUse</span> <span class="keyword">of</span> <code class="type">'a</code></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >Visit the instructions and successors of this statement
                  as usual, but use the specified state instead of the 
                  one that was passed to doStmt</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr></table>


<br><code><span class="keyword">type</span> <a name="TYPEguardaction"></a><code class="type">'a</code> guardaction = </code><table class="typetable">
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">GDefault</span></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >The default state</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr>
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">GUse</span> <span class="keyword">of</span> <code class="type">'a</code></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >Use this data for the branch</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr>
<tr>
<td align="left" valign="top" >
<code><span class="keyword">|</span></code></td>
<td align="left" valign="top" >
<code><span class="constructor">GUnreachable</span></code></td>
<td class="typefieldcomment" align="left" valign="top" ><code>(*</code></td><td class="typefieldcomment" align="left" valign="top" >The branch will never be taken.</td><td class="typefieldcomment" align="left" valign="bottom" ><code>*)</code></td>
</tr></table>


<pre><span class="keyword">module type</span> <a href="Dataflow.ForwardsTransfer.html">ForwardsTransfer</a> = <code class="code">sig</code> <a href="Dataflow.ForwardsTransfer.html">..</a> <code class="code">end</code></pre><pre><span class="keyword">module</span> <a href="Dataflow.ForwardsDataFlow.html">ForwardsDataFlow</a>: <div class="sig_block"><code class="code">functor (</code><code class="code">T</code><code class="code"> : </code><code class="type"><a href="Dataflow.ForwardsTransfer.html">ForwardsTransfer</a></code><code class="code">) -&gt; </code><code class="code">sig</code> <a href="Dataflow.ForwardsDataFlow.html">..</a> <code class="code">end</code></div></pre><pre><span class="keyword">module type</span> <a href="Dataflow.BackwardsTransfer.html">BackwardsTransfer</a> = <code class="code">sig</code> <a href="Dataflow.BackwardsTransfer.html">..</a> <code class="code">end</code></pre><pre><span class="keyword">module</span> <a href="Dataflow.BackwardsDataFlow.html">BackwardsDataFlow</a>: <div class="sig_block"><code class="code">functor (</code><code class="code">T</code><code class="code"> : </code><code class="type"><a href="Dataflow.BackwardsTransfer.html">BackwardsTransfer</a></code><code class="code">) -&gt; </code><code class="code">sig</code> <a href="Dataflow.BackwardsDataFlow.html">..</a> <code class="code">end</code></div></pre><pre><span class="keyword">val</span> <a name="VALfind_stmts"></a>find_stmts : <code class="type"><a href="Cil.html#TYPEfundec">Cil.fundec</a> -> <a href="Cil.html#TYPEstmt">Cil.stmt</a> list * <a href="Cil.html#TYPEstmt">Cil.stmt</a> list</code></pre><div class="info">
Returns (all_stmts, sink_stmts), where all_stmts is a list of the 
  statements in a function, and sink_stmts is a list of the return statments
  (including statements that fall through the end of a void function).  
  Useful when you need an initial set of statements for
  BackwardsDataFlow.compute.<br>
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