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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>