[BPF] Remove 'may_goto 0' instructions (#123482)

Emil Tsalapatis from Meta reported such a case where 'may_goto 0' insn
is generated by clang compiler. But 'may_goto 0' insn is actually a
no-op so it makes sense to remove that in llvm. The patch is also able
to handle the following code pattern
```
   ...
   may_goto 2
   may_goto 1
   may_goto 0
   ...
```
where three may_goto insns can all be removed.

---------

Co-authored-by: Yonghong Song <yonghong.song@linux.dev>

0 files changed, 0 insertions, 0 deletions