[llvm] [InstCombine] Refactor matchFunnelShift to allow more pattern (NFC) (PR #68474)

[via llvm-commits]

HaohaiWen wrote:

> > This is a NFC patch. No new tests are needed.
> 
> Sorry, I missed the NFC in the title. Here is a diff without whitespace changes that shows that this is mostly just an indentation change: https://github.com/llvm/llvm-project/pull/68474/files?diff=split&w=1
> 
> Please put up the non-NFC patch you want to base on this. It's hard to say whether this makes sense without the dependent patch.

non-NFC patch: https://github.com/llvm/llvm-project/pull/68502/commits/68ab662ac8666648f1838a18b06f05d3680604d3

https://github.com/llvm/llvm-project/pull/68474