https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99633
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Ever confirmed|0 |1
Keywords| |missed-optimization
Target| |x86_64-*-*
Status|UNCONFIRMED |NEW
Last reconfirmed| |2021-03-18
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
I guess a heuristic could be to use the available load/store bandwith (for
streaming loads/stores only) when load/store 'uops' (stmts/insns) dominate
the loop. In the case of this loop we don't even need an epilogue so that's
a plus as well.
The inner loop could also be split at LEN_1D/2 to make the load of a[LEN_1D/2]
invariant in all but a single iteration (possibly not worth the trouble in this
case).
