[Bug tree-optimization/120996] [16 regression][AArch64] 15% regression in microBUDE since r16-1108-gb7960a3f966a0f

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120996

--- Comment #14 from Richard Biener <rguenth at gcc dot gnu.org> ---
The different handling of * 1. vs * 0. w/o -ffast-math makes SLP discovery
difficult (that cannot currently compensate by inserting neutral element
operations, thus re-insert the * 1.).

Not sure how the rev in question changed this though.