[Bug tree-optimization/92283] [10 Regression] 454.calculix miscomparison since r276645 with -O2 -march=znver2

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92283

--- Comment #20 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 47216
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47216&action=edit
asm diff

-O2 -mfma -mtune=znver2 -fdbg-cnt=ivopts_loop:66:67 -fno-schedule-insns
-mno-stv -fno-tree-slsr

assembler diff attached, - is "working", + is "failing".  Can't see the obvious
error...