l#type-t">IR.Cfg.t</a> <span class="arrow">&#45;&gt;</span></span> <span><a href="../../IR/Tenv/index.html#type-t">IR.Tenv.t</a> <span class="arrow">&#45;&gt;</span></span> unit</span></code></div><div class="spec-doc"><p>This models ARC implementation of dealloc, see https://clang.llvm.org/docs/AutomaticReferenceCounting.html#dealloc. Dealloc methods can be added to ObjC classes to free C memory for example, but the deallocation of the ObjC instance variables of the object is done automatically. So here we