[llvm] [RISCV][GISEL] Legalization, register bank selection, and instruction selection for scalable G_SELECT (PR #85540)

[Michael Maitland via llvm-commits]

michaelmaitland wrote:

This PR depends on https://github.com/llvm/llvm-project/pull/84553 but I didn't include these in the commits of this PR to make it clear what commits need to be reviewed as part of this PR. I will rebase this PR on top of https://github.com/llvm/llvm-project/pull/84553 once it is merged. For now, the tests will expectedly fail.

https://github.com/llvm/llvm-project/pull/85540