[llvm] [BPF] Handle unreachable with a unimplemented kfunc call (PR #131731)

[via llvm-commits]

yonghong-song wrote:

> > > define void @buz() #0 {
> > > entry:
> > > tail call void asm sideeffect "r0 = r1; exit;", ""()
> > > unreachable
> > > }
> > 
> > 
> > As suggested by @nikic, I will later have a patch to prevent 'unreachable' for naked functions for all architectures. So this test will not be included.
> 
> As far as I understand:
> 
>     * that would be a separate PR merged at some later point;
Yes.
> 
>     * the code change in `BPFDAGToDAGISel::Select` is only necessary to handle naked functions.
Yes.
> 
> 
> Thus, I'd keep the test for now, just to have all code paths covered.
Okay, will keep the test for now at least.



https://github.com/llvm/llvm-project/pull/131731