https://gcc.gnu.org/bugzilla/show_bug.cgi?id=106553
Alexander Monakov <amonakov at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |amonakov at gcc dot gnu.org
--- Comment #1 from Alexander Monakov <amonakov at gcc dot gnu.org> ---
Are you sure the testcase is correctly reduced, i.e. does it show the same
performance degradation? Latency-wise the scheduler is making the correct
decision here: we really want to schedule second-to-last FMA
y = v_fma_f32 (y, r2, x);
earlier than its predecessor
r = v_fma_f32 (y, r2, z);
because we need to compute y*r2 before the last FMA.
