deserializeFromLLVMString
Instead of having `paseQualifiedType` and `parseAndDeserialize`, we now have a single function that is symmetric to `serializeToLLVMString`.
- `FoldModelGEP` folds `ModelGEP(AddressOf())` into `ModelGEPRef` - `RemoveRefDeref` remove `ModelGEPRef`s with no arguments