https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66094
Thomas Koenig <tkoenig at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |missed-optimization
Blocks| |37131
--- Comment #1 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
It would be nice to handle
c = matmul(transpose(a),b)
This can be changed to
do i=1,m
c_t = 0
do k=1, count
do j=1,n
c_t(j) = c_t(j) + at(k,i) * b(j,k)
end do
end do
c(i,:) = c_t
end do
with a vector temporary c_t
and
c = matmul(a,transpose(b))
changed to
c = 0
do k=1, count
do j=1,n
do i=1,m
c4(i,j) = c4(i,j) + a(i,k)*b(j,k)
end do
end do
end do
(without a vector temporary).
Referenced Bugs:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=37131
[Bug 37131] inline matmul for small matrix sizes
