[llvm] [AMDPU] More support for SILoadStoreOptimizer of buffer instructions (PR #86285)

[Jay Foad via llvm-commits]

jayfoad wrote:

> > > Can't do the merging on buffer_load_format since the format isn't known at compile time.
> > 
> > 
> > But that's all this does?
> 
> It also adds buffer_load_dword*_idxen/bothen

Then the title should say that. "Add IDXEN/BOTHEN support to buffer load/store merging" or something.

https://github.com/llvm/llvm-project/pull/86285