https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84844
--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> --- (In reply to Uroš Bizjak from comment #4) > (In reply to Jakub Jelinek from comment #3) > > Or shall I got for ?*v instead, or ???*v, or !???*v ? > > Or we can revert PR78090 fix and use preferred_for_speed attribute again. > This will allow the compiler to emit reg->xmm for cold parts. > > BTW: we shouldn't just grep assembly dumps for unoptimal insns, as was done > and reported in PR78090. There is no harm to emit reg->xmm form of the insn > in the cold parts. > > Based on this, I prefer the revert of PR78090 patch, perhaps with a run of > 462.libquantum to assess the performance impact. I can test the reversion, but don't have any setup for SPEC testing nor AMD HW, so that would need to be done by somebody else.
