[Bug tree-optimization/125873] [17 Regression] wrong code at -O{2, 3} with "-fno-aggressive-loop-optimizations" on x86_64-linux-gnu since r17-1585

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=125873

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
I cannot observe different behavior of fold_plusminus_mult_expr.  Reverting the
offending revision ontop of trunk does not fix the testcase.  But confirmed
that 16 works.

Checking 4bcb92dcb23daa446^ vs 4bcb92dcb23daa446 now.