[Bug target/84757] [7/8/9 Regression] Useless MOVs and PUSHes to store results of MUL

[vmakarov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84757

--- Comment #7 from Vladimir Makarov <vmakarov at gcc dot gnu.org> ---
(In reply to Jakub Jelinek from comment #6)
> Vlad, is this something that can be still done for GCC 9 or should we defer
> to GCC 10?

  Adding live analysis on subreg level to LRA is a big work and I think such
work should be included on stage1 only.  May be someone will express a wish to
do this work.  If not, I'll try to add it to my next year plans.