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CPP: Manually flip TC for RTJO.

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Alex Eyers-Taylor
2025-02-11 14:14:41 +00:00
parent 34ab6b3919
commit 672d896a80
1 changed files with 11 additions and 1 deletions
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12
cpp/ql/lib/semmle/code/cpp/ir/dataflow/internal/DataFlowUtil.qll
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@@ -2011,13 +2011,23 @@ module ExprFlowCached {
localFlowStep(n1, n2) localFlowStep(n1, n2)
} }
/**
* Holds if `asExpr(n1)` doesn't have a result and `n1` flows to `n2` in a single
* dataflow step.
*
* i.e. this is the transpose of `localStepFromNonExpr`
*/
private predicate localStepFromNonExprR(Node n2, Node n1) {
localStepFromNonExpr(n1, n2)
}
/** /**
* Holds if `asExpr(n1)` doesn't have a result, `asExpr(n2) = e2` and * Holds if `asExpr(n1)` doesn't have a result, `asExpr(n2) = e2` and
* `n2` is the first node reachable from `n1` such that `asExpr(n2)` exists. * `n2` is the first node reachable from `n1` such that `asExpr(n2)` exists.
*/ */
pragma[nomagic] pragma[nomagic]
private predicate localStepsToExpr(Node n1, Node n2, Expr e2) { private predicate localStepsToExpr(Node n1, Node n2, Expr e2) {
localStepFromNonExpr*(n1, n2) and localStepFromNonExprR*(n2, n1) and
e2 = asExprInternal(n2) e2 = asExprInternal(n2)
} }