[SLP] NFC. Add assert for shouldBroadcast and canBeVectorized.#119327

hstk30-hw merged 1 commit intollvm:mainllvm/llvm-project:mainfrom

HanKuanChen:slp-VLOperands-assertHanKuanChen/llvm-project:slp-VLOperands-assertCopy head branch name to clipboard