Nikolas Klauser 9598f74133
[Clang] Remove __is_referenceable builtin (#123078)
`__is_referenceable` is almost unused in the wild, and the few cases I
was able to find had checks around them. Since the places in the
standard library where `__is_referenceable` is used have bespoke
builtins, it doesn't make a ton of sense to keep this builtin around.

`__is_referenceable` has been documented as deprecated in Clang 20.
2025-02-06 15:04:23 +01:00
..

See llvm/docs/README.txt