gcc/testsuite/gfortran.dg/trim_optimize_7.f90

   1 ! { dg-do run }
   2 ! { dg-options "-O -fdump-tree-original" }
   3 ! Check that trailing trims are also removed from assignment of
   4 ! expressions involving concatenations of strings .
   5 program main
   6   character(2) :: a,b,c
   7   character(8) :: d
   8   a = 'a '
   9   b = 'b '
  10   c = 'c '
  11   d = a // b // a // trim(c)   ! This should be optimized away.
  12   if (d /= 'a b a c ') STOP 1
  13   d = a // trim(b) // c // a   ! This shouldn't.
  14   if (d /= 'a bc a  ') STOP 2
  15   d = a // b // a // trim(trim(c)) ! This should also be optimized away.
  16   if (d /= 'a b a c ') STOP 3
  17 end
  18 ! { dg-final { scan-tree-dump-times "string_len_trim" 1 "original" } }