GVN.cpp

  for (DenseMap<BasicBlock*, ValueNumberScope*>::iterator
       I = localAvail.begin(), E = localAvail.end(); I != E; ++I)
    delete I->second;
  localAvail.clear();
}

/// verifyRemoved - Verify that the specified instruction does not occur in our
/// internal data structures.
void GVN::verifyRemoved(const Instruction *Inst) const {
  VN.verifyRemoved(Inst);

  // Walk through the value number scope to make sure the instruction isn't
  // ferreted away in it.
  for (DenseMap<BasicBlock*, ValueNumberScope*>::iterator
         I = localAvail.begin(), E = localAvail.end(); I != E; ++I) {
    const ValueNumberScope *VNS = I->second;

    while (VNS) {
      for (DenseMap<uint32_t, Value*>::iterator
             II = VNS->table.begin(), IE = VNS->table.end(); II != IE; ++II) {
        assert(II->second != Inst && "Inst still in value numbering scope!");
      }

      VNS = VNS->parent;
    }
  }
}