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This patch introduces `DataflowModel`, a virtual base class for dataflow
"models": reusable analysis components that model a particular aspect of program
semantics, with respect to a specific lattice.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D121796
Files:
clang/include/clang/Analysis/FlowSensitive/DataflowAnalysis.h
Index: clang/include/clang/Analysis/FlowSensitive/DataflowAnalysis.h
===================================================================
--- clang/include/clang/Analysis/FlowSensitive/DataflowAnalysis.h
+++ clang/include/clang/Analysis/FlowSensitive/DataflowAnalysis.h
@@ -136,6 +136,26 @@
return BlockStates;
}
+/// Virtual base class for "dataflow models": reusable analysis components that
+/// model a particular aspect of program semantics, with respect to a specific
+/// lattice. Models are very similar to analyses, except:
+///
+/// a) Models implement a typed dynamic (that is, virtual) interface (with
+/// respect to the lattice type), while analyses implement an untyped
dynamic
+/// interface.
+///
+/// b) Models should focus on _modeling_ a particular aspect of program
+/// semantics -- for example, a type and its related functions, and should
be
+/// composable with other models over the same lattice.
+///
+/// c) Models do not provide an initial element -- that is the responsibility
of
+/// the analysis.
+template <typename Lattice>
+class DataflowModel : public Environment::ValueModel {
+public:
+ virtual void transfer(const Stmt *Stmt, Lattice &L, Environment &Env) = 0;
+};
+
} // namespace dataflow
} // namespace clang
Index: clang/include/clang/Analysis/FlowSensitive/DataflowAnalysis.h
===================================================================
--- clang/include/clang/Analysis/FlowSensitive/DataflowAnalysis.h
+++ clang/include/clang/Analysis/FlowSensitive/DataflowAnalysis.h
@@ -136,6 +136,26 @@
return BlockStates;
}
+/// Virtual base class for "dataflow models": reusable analysis components that
+/// model a particular aspect of program semantics, with respect to a specific
+/// lattice. Models are very similar to analyses, except:
+///
+/// a) Models implement a typed dynamic (that is, virtual) interface (with
+/// respect to the lattice type), while analyses implement an untyped dynamic
+/// interface.
+///
+/// b) Models should focus on _modeling_ a particular aspect of program
+/// semantics -- for example, a type and its related functions, and should be
+/// composable with other models over the same lattice.
+///
+/// c) Models do not provide an initial element -- that is the responsibility of
+/// the analysis.
+template <typename Lattice>
+class DataflowModel : public Environment::ValueModel {
+public:
+ virtual void transfer(const Stmt *Stmt, Lattice &L, Environment &Env) = 0;
+};
+
} // namespace dataflow
} // namespace clang
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