[llvm] [LV][NFC] Print VPlan's transformation pipline (PR #72665)

[Florian Hahn via llvm-commits]

fhahn wrote:

> Sure, I can build VPlanPass and VPlanPassManager. At this point they don't need to be as advanced as LLVM's or MLIR's pass/passmanager, but they can evolve later
> 
I don't think we need to add all the extra structure & complexity yet; runner macro or function taking a function_ref would suffice?

> I was thinking about that too and tried to minimize changes and impact on a loop-vectorize debug output, so with the changeset extra output will only appear with vplan-xforms debug type.

I was thinking about cases where people just use `-debug` (in tests and while debugging issues), which will get the full output


https://github.com/llvm/llvm-project/pull/72665