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! { dg-do run }

! { dg-options "-O -fdump-tree-original" }

! Check that trailing trims are also removed from assignment of

! expressions involving concatenations of strings .

program main

  character(2) :: a,b,c

  character(8) :: d

  a = 'a '

  b = 'b '

  c = 'c '

  d = a // b // a // trim(c)   ! This should be optimized away.

  if (d /= 'a b a c ') call abort

  d = a // trim(b) // c // a   ! This shouldn't.

  if (d /= 'a bc a  ') call abort

  d = a // b // a // trim(trim(c)) ! This should also be optimized away.

  if (d /= 'a b a c ') call abort

end

! { dg-final { scan-tree-dump-times "string_len_trim" 1 "original" } }

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