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

[via llvm-commits]

github-actions[bot] wrote:

test-suite diff from 33d2c6ad8c342d40aa443afb7dd03ad0af0e103c...9b2ebad91cea629adf992757dc9d5141d5646e1f: https://github.com/llvm/llvm-project/actions/runs/30435923542/artifacts/8720147344

Statistics: https://github.com/llvm/llvm-project/actions/runs/30435923542/artifacts/8720147881

## riscv64-linux-gnu `-march=rva23u64 -O3`
| ('Program', '')                             |   ('size..text', 'base') |   ('size..text', 'head') |   ('size..text', 'diff') |
|:--------------------------------------------|-------------------------:|-------------------------:|-------------------------:|
| SingleSour...hmarks/Shootout/Shootout-sieve |                      458 |                      480 |              0.0480349   |
| SingleSource/Benchmarks/Misc/oourafft       |                    10888 |                    10944 |              0.00514328  |
| MultiSource/Benchmarks/McCat/05-eks/eks     |                    10006 |                    10022 |              0.00159904  |
| MultiSourc...OE-ProxyApps-C/miniGMG/miniGMG |                    52756 |                    52782 |              0.000492835 |
| MultiSource/Applications/sgefa/sgefa        |                     9952 |                     9954 |              0.000200965 |
| Geomean difference                          |                      nan |                      nan |              0.000163529 |
## aarch64-linux-gnu `-march=armv9-a -O3`
| ('Program', '')                             |   ('size..text', 'base') |   ('size..text', 'head') |   ('size..text', 'diff') |
|:--------------------------------------------|-------------------------:|-------------------------:|-------------------------:|
| SingleSour...hmarks/Shootout/Shootout-sieve |                      720 |                      728 |              0.0111111   |
| MultiSource/Applications/sgefa/sgefa        |                    14592 |                    14600 |              0.000548246 |
| Geomean difference                          |                      nan |                      nan |              1.35308e-06 |
## x86_64-linux-gnu `-march=x86-64-v3 -O3`
| ('Program', '')    |   ('size..text', 'base') |   ('size..text', 'head') |   ('size..text', 'diff') |
|:-------------------|-------------------------:|-------------------------:|-------------------------:|
| Geomean difference |                      nan |                      nan |             -3.28296e-05 |


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