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! { dg-do run }
!
! PR fortran/60392
! In the transposed case call to my_mul_cont, the compiler used to (wrongly)
! reuse a transposed descriptor for an array that was not transposed as a result
! of packing.
!
! Original test case from Alexander Vogt <a.vogt@fulguritus.com>.
program test
implicit none
integer, dimension(2,2) :: A, R, RT
integer, dimension(2,2) :: B1, B2
!
! A = [ 2 17 ]
! [ 82 257 ]
!
! matmul(a,a) = [ 1398 4403 ]
! [ 21238 67443 ]
!
! matmul(transpose(a), a) = [ 6728 21108 ]
! [ 21108 66338 ]
A(1,1) = 2
A(1,2) = 17
A(2,1) = 82
A(2,2) = 257
R(1,1) = 1398
R(1,2) = 4403
R(2,1) = 21238
R(2,2) = 67443
RT(1,1) = 6728
RT(1,2) = 21108
RT(2,1) = 21108
RT(2,2) = 66338
! Normal argument
B1 = 0
B2 = 0
B1 = my_mul(A,A)
B2 = my_mul_cont(A,A)
! print *,'Normal: ',maxval(abs(B1-B2))
! print *,B1
! print *,B2
if (any(B1 /= R)) call abort
if (any(B2 /= R)) call abort
! Transposed argument
B1 = 0
B2 = 0
B1 = my_mul(transpose(A),A)
B2 = my_mul_cont(transpose(A),A)
! print *,'Transposed:',maxval(abs(B1-B2))
! print *,B1
! print *,B2
if (any(B1 /= RT)) call abort
if (any(B2 /= RT)) call abort
contains
function my_mul(A,C) result (B)
use, intrinsic :: ISO_Fortran_env
integer, intent(in) :: A(2,2), C(2,2)
integer :: B(2,2)
B = matmul(A, C)
end function
function my_mul_cont(A,C) result (B)
use, intrinsic :: ISO_Fortran_env
integer, intent(in), contiguous :: A(:,:), C(:,:)
integer :: B(2,2)
B = matmul(A, C)
end function
end program
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