https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37150
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
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Last reconfirmed|2012-10-06 07:54:57 |2021-2-11
--- Comment #30 from Richard Biener <rguenth at gcc dot gnu.org> ---
For the non-reduced testcase the problem is (still) that there is no
grouped store, the only stores left at the point of vectorization are
grid(i,j,k) = grid(i,j,k) + s01
grid(i,j2,k) = grid(i,j2,k) + s03
grid(i,j,k2) = grid(i,j,k2) + s02
grid(i,j2,k2) = grid(i,j2,k2) + s04
so the coef_xy and coef_x arrays are completely elided. And the above
stores are not contiguous.
The approaches to start from arbitrary seeds with SLP vectorization would
eventually help here (likewise of course starting from the loads which
is something that's brought up at some points).
