wyt added inline comments.

================
Comment at: 
clang/include/clang/Analysis/FlowSensitive/DataflowAnalysisContext.h:252-255
+  // FIXME: The pointer values are indexed by the pointee types which are
+  // required to initialize the `PointeeLoc` field in `PointerValue`. Consider
+  // creating a type-independent `NullPointerValue` without a `PointeeLoc`
+  // field.
----------------
@xazax.hun 
> Should we have a `PointerValue` without `PointeeLoc` to represent null 
> pointers?
`PointeeLoc` is a reference field in the current `PointerValue` so it is 
required for now.
Creating an independent `NullPointerValue` class without `PointeeLoc` is 
something we are considering, but in this patch we will be using 
`PointerValues` with a `PointeeLoc` corresponding to the pointee type to 
represent null pointers.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D128056/new/

https://reviews.llvm.org/D128056

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