[PATCH] D147698: [clang][dataflow] Add support for new and delete expressions.

[Martin Böhme via Phabricator via cfe-commits]

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To model the fact that values get deleted by a delete expression, this also
necessitates adding `DataflowEnvironment::unsetValue(StorageLocation &)` and
`StructValue::unsetValue(ValueDecl &)`.

Modeling object deletion in this way isn't perfect. In the framework, a value
that isn't present typically simply means "we didn't compute a value for this
storage location or struct field". Still, removing the values still seems better
than leaving them in place.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D147698

Files:
  clang/include/clang/Analysis/FlowSensitive/DataflowEnvironment.h
  clang/include/clang/Analysis/FlowSensitive/Value.h
  clang/lib/Analysis/FlowSensitive/DataflowEnvironment.cpp
  clang/lib/Analysis/FlowSensitive/Transfer.cpp
  clang/unittests/Analysis/FlowSensitive/TransferTest.cpp

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