[llvm] [LV] Add LoopVectorize/VPlan subdirectory for VPlan printing tests. (PR #180611)

[Florian Hahn via llvm-commits]

fhahn wrote:

> Thanks for this! Seems like a good idea to me. After quick inspection I think these other vplan testing files could be moved as well:
> 
> ```
> LoopVectorize/conditional-scalar-assignment-vplan.ll
> LoopVectorize/vplan_hcfg_stress_test.ll
> LoopVectorize/icmp-uniforms.ll
> LoopVectorize/RISCV/vplan-riscv-vector-reverse.ll
> LoopVectorize/RISCV/vplan-vp-intrinsics-reduction.ll
> LoopVectorize/RISCV/vplan-vp-intrinsics-fixed-order-recurrence.ll
> LoopVectorize/AArch64/sve2-histcnt-vplan.ll
> LoopVectorize/AArch64/widen-call-with-intrinsic-or-libfunc.ll
> LoopVectorize/AArch64/vplan-printing.ll
> LoopVectorize/AArch64/sve-tail-folding-forced.ll
> LoopVectorize/PowerPC/vplan-force-tail-with-evl.ll
> LoopVectorize/X86/vplan-vp-intrinsics.ll
> ```
> 
> Not sure if we'd want to maintain the same target hierarchy or not?

Ah yes thanks! I was also not sure about moving the target-specific tests, but I updated the PR to do so. The advantage is that we can do `check-llvm-transforms-vplan` to run all Vplan  related tests

https://github.com/llvm/llvm-project/pull/180611