https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113713
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Last reconfirmed| |2024-02-02
Status|UNCONFIRMED |NEW
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed, this is a constexpr issue in both clang and GCC (unless there is
some unspecified behavior I don't know of).
Take:
```
#if defined(CE)
#define CONSTEXPR constexpr
#else
#define CONSTEXPR
#endif
struct A{};
template<class T>
CONSTEXPR
bool p(T) { return false; }
template<class T>
CONSTEXPR
bool f(T v) { return p(v); }
CONSTEXPR
bool g() { return f(A()); }
CONSTEXPR
bool p(A) { return true; }
int main()
{
A a;
if (!f(a))
__builtin_abort();
}
```
Without CE being defined, this works at all optimizations level. With CE being
defined this works at -O0 only (like there is some [incorrect?] caching going
on at -O1 and above and clang is doing the caching at all levels).
