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! { dg-do run }
! PR 34566 - logical matmul used to give the wrong result.
! We check this by running through every permutation in
! multiplying two 3*3 matrices, and all permutations of multiplying
! a 3-vector and a 3*3 matrices and checking against equivalence
! with integer matrix multiply.
program main
implicit none
integer, parameter :: ki=4
integer, parameter :: dimen=3
integer :: i, j, k
real, dimension(dimen,dimen) :: r1, r2
integer, dimension(dimen,dimen) :: m1, m2
logical(kind=ki), dimension(dimen,dimen) :: l1, l2
logical(kind=ki), dimension(dimen*dimen) :: laux
logical(kind=ki), dimension(dimen) :: lv
integer, dimension(dimen) :: iv
do i=0,2**(dimen*dimen)-1
forall (k=1:dimen*dimen)
laux(k) = btest(i, k-1)
end forall
l1 = reshape(laux,shape(l1))
m1 = ltoi(l1)
! Check matrix*matrix multiply
do j=0,2**(dimen*dimen)-1
forall (k=1:dimen*dimen)
laux(k) = btest(i, k-1)
end forall
l2 = reshape(laux,shape(l2))
m2 = ltoi(l2)
if (any(matmul(l1,l2) .neqv. (matmul(m1,m2) /= 0))) then
STOP 1
end if
end do
! Check vector*matrix and matrix*vector multiply.
do j=0,2**dimen-1
forall (k=1:dimen)
lv(k) = btest(j, k-1)
end forall
iv = ltoi(lv)
if (any(matmul(lv,l1) .neqv. (matmul(iv,m1) /=0))) then
STOP 2
end if
if (any(matmul(l1,lv) .neqv. (matmul(m1,iv) /= 0))) then
STOP 3
end if
end do
end do
contains
elemental function ltoi(v)
implicit none
integer :: ltoi
real :: rtoi
logical(kind=4), intent(in) :: v
if (v) then
ltoi = 1
else
ltoi = 0
end if
end function ltoi
end program main
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