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!{ dg-do run }
! Test MATMUL for various arguments and results
! (test values checked with GNU octave).
! PR18857 was due to an incorrect assertion that component base==0
! for both input arguments and the result.
! provided by Paul Thomas - pault@gcc.gnu.org
Program matmul_1
integer, parameter :: N = 5
integer, parameter :: T = 4
integer :: i
real(kind=T), dimension(:,:), allocatable :: a, b, c
real(kind=T), dimension(N,N) :: x, y, z
allocate (a(2*N, N), b(N, N), c(2*N, N))
do i = 1, 2*N
a(i, :) = real (i)
end do
b = 4.0_T
do i = 1, N
x(i, :) = real (i)
end do
y = 2.0_T
! whole array
z = 0.0_T
z = matmul (x, y)
if (sum (z) /= 750.0_T) call abort ()
! array sections
c = 0.0_T
c(1:3,1:2) = matmul (a(7:9,3:N), b(3:N,3:4))
if (sum (c) /= 576.0_T) call abort ()
! uses a temp
c = 0.0_T
c = matmul (a, b + x)
if (sum (c) /= 9625.0_T) call abort ()
! returns to a temp
c = 0.0_T
c = a + matmul (a, b)
if (sum (c) /= 5775.0_T) call abort ()
deallocate (a, b, c)
end program matmul_1
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