31a552def5
This patch replaces the delinearization function used in LoopCacheAnalysis, switching from one that depends on type information in GEPs to one that does not. Once this patch and https://github.com/llvm/llvm-project/pull/161822 are landed, we can delete `tryDelinearizeFixedSize` from Delienarization, which is an optimization heuristic guided by GEP type information. After Polly eliminates its use of `getIndexExpressionsFromGEP`, we will be able to completely delete GEP-driven heuristics from Delinearization.