[llvm] [LoongArch] Enable tail calls for sret and byval functions (PR #168506)

[Sam Elliott via llvm-commits]

https://github.com/lenary commented:

I will be reverting this, the comment inline is the problem that caused me to want to revert on RISC-V, but the reality is there is a follow-on commit (ab17b5408ac83a03807b6f0ea22f51dfb84b0b8a) that touches both RISC-V and LoongArch to fix a different bug, and I think it's much cleaner to revert all three patches entirely and start again.

We're in the middle of the release cycle, so I think there is ample time to fix this and re-land it before the branch for LLVM 23.



https://github.com/llvm/llvm-project/pull/168506