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! { dg-do compile }

! { dg-options "-O2 -fdump-tree-optimized" }

! Tests whether volatile really works for arrays

! PR fortran/29601

logical, allocatable, volatile :: t1(:)

logical, allocatable :: t2(:)

integer :: i

allocate(t1(1),t2(1))

t1 = .false.

t2 = .false.

do i = 1, 2

  if(ubound(t1,1) /= 1) print *, 'VolatileNotOptimizedAway1'

  if(ubound(t2,1) /= 1) print *, 'NonVolatileNotOptimizedAway1'

end do

t1 = .false.

if(t1(1)) print *, 'VolatileNotOptimizedAway2'

t2 = .false.

if(t2(1)) print *, 'NonVolatileNotOptimizedAway2'

end

! { dg-final { scan-tree-dump "VolatileNotOptimizedAway1" "optimized" } }

! { dg-final { scan-tree-dump "VolatileNotOptimizedAway2" "optimized" } }

! { dg-final { scan-tree-dump-not "NonVolatileNotOptimizedAway1" "optimized" } }

! { dg-final { scan-tree-dump-not "NonVolatileNotOptimizedAway2" "optimized" } }

! { dg-final { cleanup-tree-dump "optimized" } }