[llvm] ConstraintElimination: use DynamicAPInt (PR #99019)

[Florian Hahn via llvm-commits]

fhahn wrote:

> To automatically handle overflows correctly

IIUC this should be fine, as we only allow expressions that won't wrap in IR semantics, so the only source of wrapping should be multiplications during solving. Unfortunately it comes at a cost of compile-time, presumably not due to overflows happening frequently but extra overhead from DynamicAPInt?

https://github.com/llvm/llvm-project/pull/99019