R/Procdesc/index.html#type-t">IR.Procdesc.t</a> <span class="arrow">&#45;&gt;</span></span> <a href="#type-t">t</a></span></code></div></div><div class="odoc-spec"><div class="spec value anchored" id="val-is_loop_head"><a href="#val-is_loop_head" class="anchor"></a><code><span><span class="keyword">val</span> is_loop_head : <span><a href="../../../../../IR/Procdesc/index.html#type-t">IR.Procdesc.t</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="Node/index.html#type-t">Node.t</a> <span class="