Method computeConstant

lib/indcallsolver/CustomCVPPass.cpp:248–254

Compute a new lattice value for the given constant. The constant, after stripping any pointer casts, should be a Function. We ignore null pointers as an optimization, since calling these values is undefined behavior.

  /// pointers as an optimization, since calling these values is undefined
  /// behavior.
  CVPLatticeVal computeConstant(Constant *C) {
    if (isa<ConstantPointerNull>(C))
      return CVPLatticeVal(CVPLatticeVal::FunctionSet);
    if (auto *F = dyn_cast<Function>(C->stripPointerCasts()))
      return CVPLatticeVal({F});
    return getOverdefinedVal();
  }

  /// Handle return instructions. The function's return state is the merge of
  /// the returned value state and the function's return state.