================
@@ -582,6 +582,15 @@ static void visitFunctionCallArguments(IndirectLocalPath
&Path, Expr *Call,
// Temp().ptr; // Here ptr might not dangle.
if (isa<MemberExpr>(Arg->IgnoreImpCasts()))
return;
+ // Avoid false positives when the object is constructed from a conditional
+ // operator argument. A common case is:
+ // // 'ptr' might not be owned by the Owner object.
+ // std::string_view s = cond() ? Owner().ptr : sv;
----------------
hokein wrote:
> I am wondering if it was possible to use the same or similar MemberExpr
> filter when we drill down to the branches of the conditional operator. If it
> is too hard to do,
This was my first approach. We could add a special `MemberExpr` filter inside
the `do-while` loop in `visitLocalsRetainedByReferenceBinding`, but I don’t
think it’s a good idea:
- the filtering logic is GSL-pointer specific, and
`visitLocalsRetainedByReferenceBinding` shouldn’t be aware of it; (layering
violation)
- adding such filtering causes new false negatives in cases like `const
string_view& sv = Owner().sv;`.
- it would scatter the special filtering logic into another place, making the
code harder to reason about.
https://github.com/llvm/llvm-project/pull/120233
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