Revert "[clang][dataflow] Transfer more cast expressions." (#157148)
Reverts llvm/llvm-project#153066
copyRecord crashes if copying from the RecordStorageLocation shared by
the base/derived objects after a DerivedToBase cast because the source
type is still `Derived` but the copy destination could be of a sibling
type derived from Base that has children not present in `Derived`.
For example, running the dataflow analysis over the following produces
UB by nullptr deref, or fails asserts if enabled:
```cc
struct Base {};
struct DerivedOne : public Base {
int DerivedOneField;
};
struct DerivedTwo : public Base {
int DerivedTwoField;
DerivedTwo(const DerivedOne& d1)
: Base(d1), DerivedTwoField(d1.DerivedOneField) {}
};
```
The constructor initializer for `DerivedTwoField` serves the purpose of
forcing `DerivedOneField` to be modeled, which is necessary to trigger
the crash but not the assert failure.
llvm-project
4c29a600 - Revert "[clang][dataflow] Transfer more cast expressions." (#157148)
