[llvm] [SDAG][ISel][TableGen][LoongArch] Report error for trivial bitcasts when there are predicate calls (PR #116075)

[Craig Topper via llvm-commits]

topperc wrote:

> > Could you share how you discovered this issue?
> 
> I discovered this issue with [a modified version of csmith](https://github.com/dtcxzyw/csmith) running on a Loongson-3A5000-based machine.
> 
> > Also, can this patch be cherry-picked to 19?
> 
> Sure.

We can't cherry-pick the tablegen code without my Mips changes though right?

https://github.com/llvm/llvm-project/pull/116075