The [clang-analyzer-deadcode.DeadStores] helper reports
that the value stored to 'irq' is never read.
Signed-off-by: NLike Xu <likexu@tencent.com>
Message-Id: <20220301120217.38092-1-likexu@tencent.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>