[llvm] [DA] Widening SCEV expressions in strong SIV test to prevent overflow (PR #164704)

[Ehsan Amiri via llvm-commits]

amehsan wrote:

> But isn't that isKnownPredicate always going to fail in the case where the multiply may overflow? That means that the value is potentially larger than the original type, and AbsDelta fits within that type. Maybe I'm misunderstanding something here.
> 

if we exnted the type then the multiply will provably not overflow.  



https://github.com/llvm/llvm-project/pull/164704