[llvm] [VPlan] Expand AddRecs in VPSCEVExpander (PR #209921)

[via llvm-commits]

github-actions[bot] wrote:

test-suite diff from 85651c297e2b3321938624bf734a51dc54138b13...76ba561ae6fcd26400c314ad394eb7741f9e96aa: https://github.com/llvm/llvm-project/actions/runs/32327918546/artifacts/9394060402

Statistics: https://github.com/llvm/llvm-project/actions/runs/32327918546/artifacts/9394060747

## riscv64-linux-gnu `-march=rva23u64 -O3`
| ('Program', '')                             |   ('size..text', 'base') |   ('size..text', 'head') |   ('size..text', 'diff') |
|:--------------------------------------------|-------------------------:|-------------------------:|-------------------------:|
| test-suite...nchmarks/McCat/05-eks/eks.test |                     9890 |                     9904 |              0.00141557  |
| Geomean difference                          |                      nan |                      nan |              4.40677e-06 |
## aarch64-linux-gnu `-march=armv9-a -O3`
| ('Program', '')    |   ('size..text', 'base') |   ('size..text', 'head') |   ('size..text', 'diff') |
|:-------------------|-------------------------:|-------------------------:|-------------------------:|
| Geomean difference |                      nan |                      nan |                        0 |
## x86_64-linux-gnu `-march=x86-64-v3 -O3`
| ('Program', '')    |   ('size..text', 'base') |   ('size..text', 'head') |   ('size..text', 'diff') |
|:-------------------|-------------------------:|-------------------------:|-------------------------:|
| Geomean difference |                      nan |                      nan |                        0 |


https://github.com/llvm/llvm-project/pull/209921