[llvm] [RISCV] [MachineOutliner] Analyze all candidates (PR #127659)

[Sam Elliott via llvm-commits]

lenary wrote:

I've added this to the 20.x release as I do think this is a big enough bug that we should fix it on the branch. I hope that's not too controversial.

https://github.com/llvm/llvm-project/pull/127659