https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83565
Jim Wilson <wilson at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2017-12-29
Ever confirmed|0 |1
--- Comment #23 from Jim Wilson <wilson at gcc dot gnu.org> ---
There should be no correctness issue with turning off WORD_REGISTER_OPERATIONS.
The only issue should be performance. If we lose 5+% performance, then we
should try to get the broken nonzero_bits1 patch reverted. If performance
stays about the same, then there is probably no point in fighting this and we
should just turn off WORD_REGISTER_OPERATIONS. None of the 3 most important
targets set it, so maybe it doesn't work correctly anymore, except maybe on
targets like sparc that have shift instructions that read subwords but write
the entire word.
