https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121239
Bug ID: 121239
Summary: mangling of non-dependent calls and operators that
resolve to an overload
Product: gcc
Version: 16.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: ppalka at gcc dot gnu.org
Target Milestone: ---
In https://gcc.gnu.org/pipermail/gcc-patches/2025-July/690520.html we noticed
the following inadvertent mangling changes of non-dependent calls/operators:
For f<int> in:
struct A { };
A operator+(A,A);
template<class T> decltype(T(),A()+A()) f();
int main() { f<int>(); }
GCC 5 mangles it as decltype (((int)()),(((A)())+((A)()))) f<int>()
GCC 6+ mangles it as decltype (((int)()),((operator+)((A)(), (A)()))) f<int>()
(since r6-5772)
Clang mangles it the same as GCC 5
For h<int> in:
template<class T> void g(T);
template<class T> decltype(T(),g(0)) h();
int main() { h<int>(); }
GCC 11 mangles it as decltype (((int)()),(g(0))) h<int>()
GCC 12+ mangles it as decltype (((int)()),(g<int>(0))) h<int>() (since
r12-6075)
Clang mangles it the same as GCC 12
