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3ad31e12cc
Used to implement CWG2191 where `typeid` for a polymorphic glvalue only becomes potentially-throwing if the `typeid` operand was already potentially throwing or a `nullptr` check was inserted: https://cplusplus.github.io/CWG/issues/2191.html Also change `Expr::hasSideEffects` for `CXXTypeidExpr` to check the operand for side-effects instead of always reporting that there are side-effects Remove `IsDeref` parameter of `CGCXXABI::shouldTypeidBeNullChecked` because it should never return `true` if `!IsDeref` (we shouldn't add a null check that wasn't there in the first place)