gcc/testsuite/gfortran.dg/leadz_trailz_3.f90

   1 ! We want to check that ISHFT evaluates its arguments only once
   2 !
   3 ! { dg-do run }
   4 ! { dg-options "-fdump-tree-original" }
   5
   6 program test
   7
   8   if (leadz (foo()) /= bit_size(0) - 1) call abort
   9   if (leadz (foo()) /= bit_size(0) - 2) call abort
  10   if (trailz (foo()) /= 0) call abort
  11   if (trailz (foo()) /= 2) call abort
  12   if (trailz (foo()) /= 0) call abort
  13   if (trailz (foo()) /= 1) call abort
  14
  15 contains
  16
  17   integer function foo ()
  18     integer, save :: i = 0
  19     i = i + 1
  20     foo = i
  21   end function
  22
  23 end program
  24
  25 ! The regexp "foo ()" should be seen once in the dump:
  26 !   -- once in the function definition itself
  27 !   -- plus as many times as the function is called
  28 !
  29 ! { dg-final { scan-tree-dump-times "foo *\\\(\\\)" 8 "original" } }
  30 ! { dg-final { cleanup-tree-dump "original" } }