https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98756
Bug ID: 98756
Summary: Suspicious "(*this)." in mangled symbol
Product: gcc
Version: 11.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: mpolacek at gcc dot gnu.org
Target Milestone: ---
For the test in PR98545:
// PR c++/98545
// { dg-do compile { target c++11 } }
class a {
public:
a();
template <typename b> a(b);
};
template <class = double> using c = a;
class f {
protected:
template <class d, class e> void operator()(d, double, e);
};
class i : f {
public:
template <class... g>
[[gnu::used]] auto h(g...) -> decltype(operator()(g()...)) {}
// { dg-final { scan-assembler
"_ZN1i1hIJ1adS1_EEEDTcldtdefpTonclspcvT__EEEDpS2_" } }
};
template <class> class C {
public:
template <class j> C(j);
i k() const;
int operator()() {
int l = 10;
c<> m, n;
operator()(m, l, n);
return 0;
}
int operator()(c<> &, c<> const &, c<> const &) const;
template <class d, class e> void k(d m, double gamma, e o) const {
k().h(m, gamma, o);
}
};
template <class r> int C<r>::operator()(c<> &, c<> const &, c<> const &) const
{
[&](c<> m, double gamma, c<> o) { k(m, gamma, o); };
return 0;
}
c<> p = C<double>(p)();
we emit
$ c++filt _ZN1i1hIJ1adS1_EEEDTcldtdefpTonclspcvT__EEEDpS2_
decltype (((*this).(operator()))((a)(), (double)(), (a)())) i::h<a, double,
a>(a, double, a)
though other compilers emit:
$ c++filt _ZN1i1hIJ1adS1_EEEDTclonclspcvT__EEEDpS2_
decltype ((operator())((a)(), (double)(), (a)())) i::h<a, double, a>(a, double,
a)
as mentioned in
<https://gcc.gnu.org/pipermail/gcc-patches/2021-January/563419.html>.
This should be investigated.
