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C++: Fix getTempVariable join order in IR #2510

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Merged
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Dec 10, 2019
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C++: Fix getTempVariable join order in IR #2510

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14 changes: 11 additions & 3 deletions cpp/ql/src/semmle/code/cpp/ir/implementation/raw/internal/TranslatedElement.qll
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Original file line number Diff line number Diff line change
Expand Up @@ -684,9 +684,17 @@ abstract class TranslatedElement extends TTranslatedElement {
* Gets the temporary variable generated by this element with tag `tag`.
*/
final IRTempVariable getTempVariable(TempVariableTag tag) {
result.getAST() = getAST() and
result.getTag() = tag and
hasTempVariable(tag, _)
exists(Locatable ast |
result.getAST() = ast and
result.getTag() = tag and
hasTempVariableAndAST(tag, ast)
)
}

pragma[noinline]
private predicate hasTempVariableAndAST(TempVariableTag tag, Locatable ast) {
hasTempVariable(tag, _) and
ast = getAST()
}

/**
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