[llvm] [SDag][ARM][RISCV] Allow lowering CTPOP into a libcall (PR #99752)

[Sergei Barannikov via llvm-commits]

s-barannikov wrote:

This is likely causing armv7/v8 stage2 build failures (other changes don't look related):
https://lab.llvm.org/buildbot/#/builders/122/builds/389
https://lab.llvm.org/buildbot/#/builders/79/builds/552

I don't have an ARM machine handy to investigate, so I'll just revert the ARM changes and see if it helps.


https://github.com/llvm/llvm-project/pull/99752