[llvm] [LV] Enable the exit value optimization via SCEV for tail folding. (PR #210928)

[via llvm-commits]

github-actions[bot] wrote:

test-suite diff from a106c1ce65a2f97271df7266d3ae446516dc4739...693540572fed526ed1878661015ae1dd70bb7658: https://github.com/llvm/llvm-project/actions/runs/32879902895/artifacts/9578080899

Statistics: https://github.com/llvm/llvm-project/actions/runs/32879902895/artifacts/9578082006

## riscv64-linux-gnu `-march=rva23u64 -O3`
| ('Program', '')    |   ('size..text', 'base') |   ('size..text', 'head') |   ('size..text', 'diff') |
|:-------------------|-------------------------:|-------------------------:|-------------------------:|
| Geomean difference |                      nan |                      nan |               -1.262e-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/210928