[llvm] [PM] Execute IndVarSimplifyPass precede RessociatePass (PR #71054)

[Florian Hahn via llvm-commits]

fhahn wrote:

Could you add some performance data backing up the benefits of the change? Adding additional runs of IndVars likely also impacts compile time which needs to be evaluated also.

https://github.com/llvm/llvm-project/pull/71054