https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89204
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Last reconfirmed|2019-02-05 00:00:00 |
CC| |amker at gcc dot gnu.org
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
If I make the example more "similar":
subroutine matrix_mul(n)
integer, intent(in) :: n
integer :: i, j, k
do k = 1, n
do j = 1, n
do i = 1, n
c(j,i) = c(j,i) + a(k,i)*b(j,k)
end do
end do
end do
end subroutine matrix_mul
dumps tell me:
Consider loop interchange for loop_nest<2 - 3>
Access Strides for DRs:
b[_13]: <4, 0>
c[_5]: <4, 8192>
a[_9]: <0, 8192>
c[_5]: <4, 8192>
but isn't very chatty about why exactly interchange didn't happen.
