C#: Remove PreSsa library
#20994
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C#: Remove PreSsa library
#20994
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Pull request overview
This PR removes the PreSsa library from the C# codebase following the removal of CFG splitting based on Boolean values. The cleanup consolidates SSA-related functionality into the BaseSSA module.
- The entire
PreSsa.qlllibrary is deleted along with its associated test files - SSA functionality previously in
PreSsa(likeSimpleLocalScopeVariableand related predicates) is migrated toBaseSSA.qll - References to
PreSsaacross the codebase are updated to useBaseSSAinstead
Reviewed changes
Copilot reviewed 10 out of 10 changed files in this pull request and generated 1 comment.
Show a summary per file
| File | Description |
|---|---|
csharp/ql/lib/semmle/code/csharp/controlflow/internal/PreSsa.qll |
Deleted - entire PreSsa library removed |
csharp/ql/test/library-tests/dataflow/ssa/PreSsaConsistency.ql |
Deleted - test file for PreSsa consistency checks |
csharp/ql/test/library-tests/dataflow/ssa/PreSsaConsistency.expected |
Deleted - expected output for PreSsa consistency tests |
csharp/ql/lib/semmle/code/csharp/dataflow/internal/BaseSSA.qll |
Moved SimpleLocalScopeVariable class and supporting predicates from PreSsa |
csharp/ql/lib/semmle/code/csharp/dataflow/internal/SsaImpl.qll |
Updated import from PreSsa to BaseSSA |
csharp/ql/lib/semmle/code/csharp/controlflow/internal/Splitting.qll |
Removed TSsaBooleanSplitSubKind and PreSsa import |
csharp/ql/lib/semmle/code/csharp/controlflow/Guards.qll |
Removed PreCfg module and moved predicates to top level; one incorrect reference updated |
csharp/ql/test/library-tests/dataflow/defuse/useUseEquivalence.ql |
Updated import and type references from PreSsa to BaseSSA |
csharp/ql/test/library-tests/dataflow/defuse/parameterUseEquivalence.ql |
Updated import and type references from PreSsa to BaseSSA |
csharp/ql/test/library-tests/dataflow/defuse/defUseEquivalence.ql |
Updated import and type references from PreSsa to BaseSSA |
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michaelnebel
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Dec 12, 2025
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Looks plausible to me!
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Now that CFG splitting based on Boolean values has been removed, we no longer need the
PreSsalibrary.