[llvm] [BPF] Support Jump Table (PR #149715)

[via llvm-commits]

yonghong-song wrote:

> @yonghong-song A side note. I am constantly getting
> 
> ```
> In file included from /home/aspsk/src/llvm-project/llvm/lib/Target/BPF/BPFISelLowering.h:17,
>                  from /home/aspsk/src/llvm-project/llvm/lib/Target/BPF/BPFSubtarget.h:17,
>                  from /home/aspsk/src/llvm-project/llvm/lib/Target/BPF/BPFSubtarget.cpp:13:
> /home/aspsk/src/llvm-project/llvm/lib/Target/BPF/BPF.h:25:20: warning: ‘llvm::BPF_TRAP’ defined but not used [-Wunused-variable]
>    25 | static const char *BPF_TRAP = "__bpf_trap";
>       |                    ^~~~~~~~
> ```
> 
> Is this a not removed leftover from an old version?

This has been reported in https://github.com/llvm/llvm-project/pull/131731#issuecomment-3095704478
I will take a look soon. BTW, what is you cmake build command?

https://github.com/llvm/llvm-project/pull/149715