[llvm] Update the base and index value for masked gather (PR #130920)

[Rohit Aggarwal via llvm-commits]

rohitaggarwal007 wrote:

> I'd much prefer to see this fixed in x86 in combineGatherScatter, where there's already a lot of similar code - the TLI callback seems too x86 specific tbh.

Sure, I will more the code to combineGatherScatter

https://github.com/llvm/llvm-project/pull/130920