[llvm] [RISCV] Added new register class GPRNoGPRS defined as substraction of GPRC sequences from GPR (PR #106974)

[Pengcheng Wang via llvm-commits]

wangpc-pp wrote:

> It can be useful for some compiler routine and llvm-based RISC-V tools.

Can you give an example?

https://github.com/llvm/llvm-project/pull/106974