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module m
use omp_lib
implicit none (type, external)
contains
subroutine foo (x, a)
integer, value :: x
integer, contiguous :: a(0:)
integer :: i
!$omp masked
if (omp_get_thread_num () /= 0) &
stop 1
a(128) = a(128) + 1
!$omp end masked
!$omp masked filter (0)
if (omp_get_thread_num () /= 0) &
stop 2
a(129) = a(129) + 1
!$omp end masked
!$omp masked filter (7)
if (omp_get_thread_num () /= 7) &
stop 3
a(130) = a(130) + 1
!$omp end masked
!$omp masked filter (x)
if (omp_get_thread_num () /= x) &
stop 4
a(131) = a(131) + 1
!$omp end masked
!$omp masked taskloop simd filter (x) shared(a) grainsize (12) simdlen (4)
do i = 0, 127
a(i) = a(i) + i
end do
!$omp end masked taskloop simd
end
end
program main
use m
implicit none (type, external)
integer :: i
integer :: a(0:135)
a = 0
!$omp parallel num_threads (4)
call foo (4, a)
!$omp end parallel
do i = 0, 127
if (a(i) /= 0) &
stop 5
end do
if (a(128) /= 1 .or. a(129) /= 1 .or. a(130) /= 0 .or. a(131) /= 0) &
stop 6
!$omp parallel num_threads (4)
call foo (3, a)
!$omp end parallel
do i = 0, 127
if (a(i) /= i) &
stop 7
end do
if (a(128) /= 2 .or. a(129) /= 2 .or. a(130) /= 0 .or. a(131) /= 1) &
stop 8
!$omp parallel num_threads (8)
call foo (8, a)
!$omp end parallel
do i = 0, 127
if (a(i) /= i) &
stop 9
end do
if (a(128) /= 3 .or. a(129) /= 3 .or. a(130) /= 1 .or. a(131) /= 1) &
stop 10
!$omp parallel num_threads (8)
call foo (6, a)
!$omp end parallel
do i = 0, 127
if (a(i) /= 2 * i) &
stop 11
end do
if (a(128) /= 4 .or. a(129) /= 4 .or. a(130) /= 2 .or. a(131) /= 2) &
stop 12
do i = 0, 7
a(i) = 0
end do
! The filter expression can evaluate to different values in different threads.
!$omp parallel masked num_threads (8) filter (omp_get_thread_num () + 1)
a(omp_get_thread_num ()) = a(omp_get_thread_num ()) + 1
!$omp end parallel masked
do i = 0, 7
if (a(i) /= 0) &
stop 13
end do
! And multiple threads can be filtered.
!$omp parallel masked num_threads (8) filter (iand (omp_get_thread_num (), not(1)))
a(omp_get_thread_num ()) = a(omp_get_thread_num ()) + 1
!$omp end parallel masked
do i = 0, 7
block
integer :: j
j = iand (i, 1)
if (j /= 0) then
j = 0
else
j = 1
end if
if (a(i) /= j) &
stop 14
end block
end do
end program main
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