[Bug tree-optimization/126143] phiopt does not flatten predicate-uniform multi-PHI diamonds: argmax-style scalar loops keep unpredictable branches at -O2

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126143

--- Comment #6 from ptomsich at gcc dot gnu.org ---
Which brings up my earlier question regarding the disposition of this PR:
should we repurpose it for the ifcvt-improvement?  If so, I'll update the title
field...