gcc/testsuite/gfortran.dg/volatile6.f90

   1 ! { dg-do compile }
   2 ! { dg-options "-O2 -fdump-tree-optimized" }
   3 ! Tests whether volatile really works for arrays
   4 ! PR fortran/29601
   5 logical, allocatable, volatile :: t1(:)
   6 logical, allocatable :: t2(:)
   7 integer :: i
   8
   9 allocate(t1(1),t2(1))
  10 t1 = .false.
  11 t2 = .false.
  12 do i = 1, 2
  13   if(ubound(t1,1) /= 1) print *, 'VolatileNotOptimizedAway1'
  14   if(ubound(t2,1) /= 1) print *, 'NonVolatileNotOptimizedAway1'
  15 end do
  16
  17 t1 = .false.
  18 if(t1(1)) print *, 'VolatileNotOptimizedAway2'
  19 t2 = .false.
  20 if(t2(1)) print *, 'NonVolatileNotOptimizedAway2'
  21 end
  22 ! { dg-final { scan-tree-dump "VolatileNotOptimizedAway1" "optimized" } }
  23 ! { dg-final { scan-tree-dump "VolatileNotOptimizedAway2" "optimized" } }
  24 ! { dg-final { scan-tree-dump-not "NonVolatileNotOptimizedAway1" "optimized" } }
  25 ! { dg-final { scan-tree-dump-not "NonVolatileNotOptimizedAway2" "optimized" } }