[Bug target/106902] [12/13/14/15 Regression] Program compiled with -O3 -mfma produces different result

[sjames at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106902

--- Comment #35 from Sam James <sjames at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #34)
> I do remember patches to implement -ffp-contract=on, what's their status? 
> Can they be linked to from this PR?

r14-2023-g1c1dd39625719d. AFAIK, the next step is to make it a default, but
Alexander is far better placed to explain.