Congzhe Cao 05ccde8023 [LoopCacheAnalysis] Fix a type mismatch problem in cost calculation ...

There is a problem in loop cache analysis that the types of SCEV variables
`Coeff` and `ElemSize` in function `isConsecutive()` may not match. The
mismatch would cause SCEV failures when `Coeff` is multiplied with `ElemSize`.

The fix in this patch is to extend the type of both `Coeff` and `ElemSize` to
whichever is wider in those two variables. As a clean-up, duplicate calculations
of `Stride` in `computeRefCost()` is then removed.

Reviewed By: Meinersbur, #loopoptwg

Differential Revision: https://reviews.llvm.org/D128877

2022-07-21 01:57:05 -04:00

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