[llvm] [GISel][RISCV]Implement indirect parameter passing for large scalars (PR #95429)

[Craig Topper via llvm-commits]

topperc wrote:

> Why don't just do the lowering in the frontend? I.e. return getNaturalAlignIndirect(...) if argument's size exceeds 2xXLEN

I think we do.

https://github.com/llvm/llvm-project/pull/95429