CodeQL library for C/C++
codeql/cpp-all 1.1.2-dev (changelog, source)
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Predicate SsaCached::lastRefRedefExt

Holds if the node at index i in bb is a last reference to SSA definition def. The reference is last because it can reach another write next, without passing through another read or write.

The path from node i in bb to next goes via basic block input, which is either a predecessor of the basic block of next, or input = bb in case next occurs in basic block bb.

Import path

import semmle.code.cpp.ir.dataflow.internal.SsaInternals
predicate lastRefRedefExt(DefinitionExt def, SourceVariable sv, IRBlock bb, int i, IRBlock input, DefinitionExt next)