Interface DataflowInformation

The dataflow information is one of the fundamental structures we have in the dataflow analysis. It is continuously updated during the dataflow analysis and holds its current state for the respective subtree processed. Each processor during the dataflow analysis may use the information from its children to produce a new state of the dataflow information.

You may initialize a new dataflow information with initializeCleanDataflowInformation.

See

DataflowCfgInformation - the control flow aspects

interface DataflowInformation {
    entryPoint: NodeId;
    environment: REnvironmentInformation;
    exitPoints: readonly ExitPoint[];
    graph: DataflowGraph<DataflowGraphVertexInfo, DataflowGraphEdge>;
    in: readonly IdentifierReference[];
    out: readonly IdentifierReference[];
    unknownReferences: readonly IdentifierReference[];
}

Hierarchy (view full)

Hierarchy-Diagram

UML class diagram of DataflowInformation

Properties

entryPoint environment exitPoints graph in out unknownReferences

Properties

entryPoint

entryPoint: NodeId

The entry node into the subgraph

environment

environment: REnvironmentInformation

Current environments used for name resolution, probably updated on the next expression-list processing

exitPoints

exitPoints: readonly ExitPoint[]

All already identified exit points (active 'return'/'break'/'next'-likes) of the respective structure.

graph

graph: DataflowGraph<DataflowGraphVertexInfo, DataflowGraphEdge>

The current constructed dataflow graph

in

in: readonly IdentifierReference[]

References which are read within the current subtree.

See

IdentifierReference - a reference on a variable, parameter, function call, ...

out

out: readonly IdentifierReference[]

References which are written to within the current subtree

See

IdentifierReference - a reference on a variable, parameter, function call, ...

unknownReferences

unknownReferences: readonly IdentifierReference[]

References that have not been identified as read or write and will be so on higher processors.

For example, when we analyze the x vertex in x <- 3, we will first create an unknown reference for x as we have not yet seen the assignment!

See

IdentifierReference - a reference on a variable, parameter, function call, ...

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