[llvm] [RISCV] Do not tail call optimize if arguments are passed indirectly (PR #184972)

[Eli Friedman via llvm-commits]

https://github.com/efriedma-quic commented:

Please add a testcase for a musttail call.  (For musttail, we know the signatures match, so we have a place to store the value: the memory allocated by the caller.)

https://github.com/llvm/llvm-project/pull/184972