Function LLVMBuildAtomicCmpXchgSyncScope 

#[unsafe(no_mangle)]
pub extern "C" fn LLVMBuildAtomicCmpXchgSyncScope(
    B: LLVMBuilderRef,
    Ptr: LLVMValueRef,
    Cmp: LLVMValueRef,
    New: LLVMValueRef,
    SuccessOrdering: LLVMAtomicOrdering,
    FailureOrdering: LLVMAtomicOrdering,
    SSID: c_uint,
) -> LLVMValueRef