[llvm] [RISCV] Porting hasAllNBitUsers to RISCV GISel for instruction select (PR #124678)

[Craig Topper via llvm-commits]

topperc wrote:

> Why was this closed?

github wasn't refreshing the page to show the correct version of the patch. There was a status that said "Processing Update" for over day. A similar thing happened with several of my patches yesterday. There was a conversation in #backends on discord that suggested opening a new PR and linking to this one.

https://github.com/llvm/llvm-project/pull/124678