[Lldb-commits] [lldb] Use `llvm::APInt` for `VariantMember` Discriminants (PR #188487)

[via lldb-commits]

Nerixyz wrote:

> I'm not super familiar with LLDB's testing infrastructure

Tried hacking around to get a reproducer:
```rust
#![no_std]
#![no_main]

#[allow(unused)]
#[repr(u128)]
enum BigDiscr {
    Value(u64),
    None = 0x16151413121110090807060504030201,
}

fn use_it(_: &BigDiscr) {}

#[panic_handler]
fn panic(_info: &core::panic::PanicInfo) -> ! {
    loop {}
}

#[no_mangle]
extern "C" fn main() {
    let none = BigDiscr::None;
    let some = BigDiscr::Value(31);

    use_it(&none);
    use_it(&some);
}
``` 
Compiled with `rustc main.rs -g -C panic=abort -C link-arg=-nostdlib` on x86_64 Linux yields a 5.8K object file and 12K obj2yaml'd file.

https://github.com/llvm/llvm-project/pull/188487