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<link title="Dominators" rel="Chapter" href="Dominators.html"><title>CIL API Documentation (version 1.3.5) : Dataflow.ForwardsTransfer</title>
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<center><h1>Module type <a href="type_Dataflow.ForwardsTransfer.html">Dataflow.ForwardsTransfer</a></h1></center>
<br>
<pre><span class="keyword">module type</span> ForwardsTransfer = <code class="code">sig</code> <a href="Dataflow.ForwardsTransfer.html">..</a> <code class="code">end</code></pre><hr width="100%">
<pre><span class="keyword">val</span> <a name="VALname"></a>name : <code class="type">string</code></pre><div class="info">
For debugging purposes, the name of the analysis<br>
</div>
<pre><span class="keyword">val</span> <a name="VALdebug"></a>debug : <code class="type">bool Pervasives.ref</code></pre><div class="info">
Whether to turn on debugging<br>
</div>
<pre><span class="keyword">type</span> <a name="TYPEt"></a><code class="type"></code>t </pre>
<div class="info">
The type of the data we compute for each block start. May be 
 imperative.<br>
</div>

<pre><span class="keyword">val</span> <a name="VALcopy"></a>copy : <code class="type"><a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> -> <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a></code></pre><div class="info">
Make a deep copy of the data<br>
</div>
<pre><span class="keyword">val</span> <a name="VALstmtStartData"></a>stmtStartData : <code class="type"><a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> Inthash.t</code></pre><div class="info">
For each statement id, the data at the start. Not found in the hash 
 table means nothing is known about the state at this point. At the end 
 of the analysis this means that the block is not reachable.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALpretty"></a>pretty : <code class="type">unit -> <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> -> <a href="Pretty.html#TYPEdoc">Pretty.doc</a></code></pre><div class="info">
Pretty-print the state<br>
</div>
<pre><span class="keyword">val</span> <a name="VALcomputeFirstPredecessor"></a>computeFirstPredecessor : <code class="type"><a href="Cil.html#TYPEstmt">Cil.stmt</a> -> <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> -> <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a></code></pre><div class="info">
Give the first value for a predecessors, compute the value to be set 
 for the block<br>
</div>
<pre><span class="keyword">val</span> <a name="VALcombinePredecessors"></a>combinePredecessors : <code class="type"><a href="Cil.html#TYPEstmt">Cil.stmt</a> -><br>       old:<a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> -><br>       <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> -> <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> option</code></pre><div class="info">
Take some old data for the start of a statement, and some new data for 
 the same point. Return None if the combination is identical to the old 
 data. Otherwise, compute the combination, and return it.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALdoInstr"></a>doInstr : <code class="type"><a href="Cil.html#TYPEinstr">Cil.instr</a> -><br>       <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> -> <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> <a href="Dataflow.html#TYPEaction">Dataflow.action</a></code></pre><div class="info">
The (forwards) transfer function for an instruction. The 
 <a href="Cil.html#VALcurrentLoc"><code class="code">Cil.currentLoc</code></a> is set before calling this. The default action is to 
 continue with the state unchanged.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALdoStmt"></a>doStmt : <code class="type"><a href="Cil.html#TYPEstmt">Cil.stmt</a> -><br>       <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> -><br>       <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> <a href="Dataflow.html#TYPEstmtaction">Dataflow.stmtaction</a></code></pre><div class="info">
The (forwards) transfer function for a statement. The <a href="Cil.html#VALcurrentLoc"><code class="code">Cil.currentLoc</code></a> 
 is set before calling this. The default action is to do the instructions
 in this statement, if applicable, and continue with the successors.<br>
</div>
<pre><span class="keyword">val</span> <a name="VALdoGuard"></a>doGuard : <code class="type"><a href="Cil.html#TYPEexp">Cil.exp</a> -><br>       <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> -><br>       <a href="Dataflow.ForwardsTransfer.html#TYPEt">t</a> <a href="Dataflow.html#TYPEguardaction">Dataflow.guardaction</a></code></pre><div class="info">
Generate the successor to an If statement assuming the given expression
 is nonzero.  Analyses that don't need guard information can return 
 GDefault; this is equivalent to returning GUse of the input.
 A return value of GUnreachable indicates that this half of the branch
 will not be taken and should not be explored.  This will be called
 twice per If, once for "then" and once for "else".<br>
</div>
<pre><span class="keyword">val</span> <a name="VALfilterStmt"></a>filterStmt : <code class="type"><a href="Cil.html#TYPEstmt">Cil.stmt</a> -> bool</code></pre><div class="info">
Whether to put this statement in the worklist. This is called when a 
 block would normally be put in the worklist.<br>
</div>
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