[llvm-branch-commits] [lld] [llvm][lld][RISCV] Support x3_reg_usage (PR #84598)

[Paul Kirth via llvm-branch-commits]

ilovepi wrote:

I've tried to use SubtargetFeatures to model the behavior here, but I don't really love the approach. It feels to me like I've chosen the wrong construct, but I'm not sure what that would be. There are obviously still some changes that would be required in the Clang driver to land this(at least for the SCS and GP-relax cases), but I'd rather wait until the mechanism is agreed upon before doing that.

https://github.com/llvm/llvm-project/pull/84598