codeql/java/ql/lib/change-notes/2024-11-14-control-flow-graph-lightweight-IR-layer.md

category

category
breaking

• The class ControlFlowNode (and by extension BasicBlock) is no longer directly equatable to Expr and Stmt. Any queries that have been exploiting these equalities, for example by using casts, will need minor updates in order to fix any compilation errors. Conversions can be inserted in either direction depending on what is most convenient. Available conversions include Expr.getControlFlowNode(), Stmt.getControlFlowNode(), ControlFlowNode.asExpr(), ControlFlowNode.asStmt(), and ControlFlowNode.asCall(). Exit nodes were until now modelled as a ControlFlowNode equal to its enclosing Callable; these are now instead modelled by the class ControlFlow::ExitNode.