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Python: add new shared-SSA-backed SSA adapter (additive) #21923

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Python: add new shared-SSA-backed SSA adapter (additive) #21923

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4 changes: 4 additions & 0 deletions python/ql/lib/change-notes/2026-05-19-add-shared-ssa.md
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* A new SSA adapter has been added under `semmle.python.dataflow.new.internal.SsaImpl`, built on the shared `codeql.ssa.Ssa` library and the new shared CFG (`semmle.python.controlflow.internal.Cfg`). It is not yet used by the dataflow library or any production query; the legacy ESSA SSA in `semmle/python/essa/*` remains the default. The new SSA adapter is exposed for tests and for the upcoming dataflow migration.
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