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! { dg-do run }
program main
implicit none
integer, parameter :: n=5
character(len=6), dimension(n,n) :: a
integer, dimension(n,n) :: v
character(len=6), dimension(n) :: r1, r2
character(len=6), dimension(:,:), allocatable :: a_alloc
integer, dimension(:,:), allocatable :: v_alloc
character(len=6), parameter :: zero = achar(0) // achar(0) // achar(0) // achar(0) // achar(0) // achar(0)
integer :: i
character(len=6),dimension(1) :: ret
logical, dimension(n,n) :: mask
logical :: smask
v = reshape([(i*i+200-17*i,i=1,n*n)],shape(v))
write (unit=a,fmt='(I6.6)') (i*i+200-17*i,i=1,n*n)
r1 = maxval(a,dim=1)
write (unit=r2,fmt='(I6.6)') maxval(v,dim=1)
if (any (r1 /= r2)) STOP 1
r1 = 'x'
write (unit=r1,fmt='(I6.6)') maxval(v,dim=1)
if (any (r1 /= r2)) STOP 2
r1 = 'y'
r1 = maxval(a,dim=2)
write (unit=r2,fmt='(I6.6)') maxval(v,dim=2)
if (any (r1 /= r2)) STOP 3
r1 = 'z'
write (unit=r1,fmt='(I6.6)') maxval(v,dim=2)
if (any (r1 /= r2)) STOP 4
allocate (a_alloc(0,1), v_alloc(0,1))
ret = 'what'
ret = maxval(a_alloc,dim=1)
if (ret(1) /= zero) STOP 5
r1 = 'qq'
r1 = maxval(a, dim=1, mask=a>"000200");
if (any(r1 /= zero .neqv. maxval(v,dim=1, mask=v>200) > 0)) STOP 6
if (any(maxval(a, dim=1, mask=a>"000200") /= zero .neqv. maxval(v,dim=1, mask=v>200) > 0)) STOP 7
r1 = 'rr'
r1 = maxval(a, dim=2, mask=a>"000200");
if (any(r1 /= zero .neqv. maxval(v,dim=2, mask=v>200) > 0)) STOP 8
if (any(maxval(a, dim=2, mask=a>"000200") /= zero .neqv. maxval(v,dim=2, mask=v>200) > 0)) STOP 9
mask = .true.
forall (i=1:n)
mask(i,i) = .false.
end forall
r1 = 'aa'
r1 = maxval(a, dim=1, mask=mask)
write(unit=r2,fmt='(I6.6)') maxval(v,dim=1, mask=mask)
if (any(r1 /= r2)) STOP 10
r1 = 'xyz'
smask = .true.
r1 = maxval(a, dim=1, mask=smask)
write (unit=r2,fmt='(I6.6)') maxval(v,dim=1)
if (any (r1 /= r2)) STOP 11
smask = .false.
r1 = 'foobar'
r1 = maxval(a, dim=1, mask=smask)
if (any(r1 /= zero)) STOP 12
end program main
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