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! Exercise nested function decomposition, gcc/tree-nested.c.
! { dg-do run }
program collapse2
call test1
call test2
contains
subroutine test1
integer :: i, j, k, a(1:3, 4:6, 5:7)
logical :: l
l = .false.
a(:, :, :) = 0
!$acc parallel reduction (.or.:l)
!$acc loop worker vector collapse(4 - 1)
do 164 i = 1, 3
do 164 j = 4, 6
do 164 k = 5, 7
a(i, j, k) = i + j + k
164 end do
!$acc loop worker vector reduction(.or.:l) collapse(2)
firstdo: do i = 1, 3
do j = 4, 6
do k = 5, 7
if (a(i, j, k) .ne. (i + j + k)) l = .true.
end do
end do
end do firstdo
!$acc end parallel
if (l) call abort
end subroutine test1
subroutine test2
integer :: a(3,3,3), k, kk, kkk, l, ll, lll
a = 0
!$acc parallel
! Use "gang(static:1)" here and below to effectively turn gang-redundant
! execution mode into something like gang-single.
!$acc loop gang(static:1) collapse(1)
do 115 k=1,3
!$acc loop collapse(2)
dokk: do kk=1,3
do kkk=1,3
a(k,kk,kkk) = 1
enddo
enddo dokk
115 continue
!$acc loop gang(static:1) collapse(1)
do k=1,3
if (any(a(k,1:3,1:3).ne.1)) call abort
enddo
! Use "gang(static:1)" here and below to effectively turn gang-redundant
! execution mode into something like gang-single.
!$acc loop gang(static:1) collapse(1)
dol: do 120 l=1,3
!$acc loop collapse(2)
doll: do ll=1,3
do lll=1,3
a(l,ll,lll) = 2
enddo
enddo doll
120 end do dol
!$acc loop gang(static:1) collapse(1)
do l=1,3
if (any(a(l,1:3,1:3).ne.2)) call abort
enddo
!$acc end parallel
end subroutine test2
end program collapse2
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