[llvm] [SDAG] Avoid creating redundant stack slots when lowering FSINCOS (PR #108401)

[Benjamin Maxwell via llvm-commits]

MacDue wrote:

> Hi @MacDue ,
> 
> We've run into a run-time failure exposed by this change. I've just created [140491](https://github.com/llvm/llvm-project/issues/140491) for it. Could you have a look, please. Thanks!

I believe https://github.com/llvm/llvm-project/pull/140525 should fix this issue. Thanks for report :+1: 

https://github.com/llvm/llvm-project/pull/108401