[clang] [AMDGPU] Add another SIFoldOperands instance after shrink (PR #67878)

[Jay Foad via cfe-commits]

jayfoad wrote:

I've just tested this on 10000 graphics shaders and it seems to make no difference at all. I tried gfx900 and gfx1100. Can anyone else from the graphics team confirm this?

https://github.com/llvm/llvm-project/pull/67878