[Bug c++/120247] New: __builtin_assoc_barrier and binding to a reference type

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120247

            Bug ID: 120247
           Summary: __builtin_assoc_barrier and binding to a reference
                    type
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Keywords: accepts-invalid
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: pinskia at gcc dot gnu.org
          Reporter: pinskia at gcc dot gnu.org
  Target Milestone: ---

Take:
```
void f(int &);
void g(int a)
{
  f(__builtin_assoc_barrier(a));
}
void fp(int *);
void gp(int a)
{
  fp(&__builtin_assoc_barrier(a));
}
```

GCC accepts them and allows binding a temporay to an int& and even take the
address of it.