[llvm] [LoopFusion] Fix crash "SCEVAddRecExpr operand is not available at loop entry (PR #176378)

[Ehsan Amiri via llvm-commits]

amehsan wrote:

> I believe we need to switch the default

I realized one of the testcases fails when we switch the default. We need to process the result of dependence analysis a bit more to fix this. Working on it.

https://github.com/llvm/llvm-project/pull/176378