[Bug tree-optimization/113441] [14 Regression] Fail to fold the last element with multiple loop

[tnfchris at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=113441

--- Comment #17 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
Ok, bisected to

g:2efe3a7de0107618397264017fb045f237764cc7 is the first bad commit
commit 2efe3a7de0107618397264017fb045f237764cc7
Author: Hao Liu <h...@os.amperecomputing.com>
Date:   Wed Dec 6 14:52:19 2023 +0800

    tree-optimization/112774: extend the SCEV CHREC tree with a nonwrapping
flag

Before this commit we were unable to analyse the stride of the access.
After this niters seems to estimate the loop trip count at 4 and after that the
logs diverge enormously.