https://gcc.gnu.org/bugzilla/show_bug.cgi?id=103088
--- Comment #11 from Tamar Christina <tnfchris at gcc dot gnu.org> --- > > Richi the configury bits you shared once upon a time had > > -fno-unsafe-math-optimizations for 500.perlbench. Are there known issues > > with > > this test for -ffast-math that we had -fno-unsafe-math-optimizations? > > Indeed - interesting. I don't remember anything and I have originally > copied this config from our testers which means iff then maybe > Martin knows ... ;) Historically it has always only been for the test dataset with the problem Aldy encountered before with the signed zeros. See https://www.spec.org/cpu2017/Docs/benchmarks/500.perlbench_r.html at the section for GCC and -Ofast. train and ref used to work fine before. It may be perfectly valid that we need it now for the rest too, but it's unclear to me if that's due to a new valid transformation or an invalid one.
