gcc/testsuite/gfortran.dg/intrinsic_actual_1.f

   1 ! { dg-do compile }
   2 ! Tests the fix for PR27554, where the actual argument reference
   3 ! to abs would not be recognised as being to an intrinsic
   4 ! procedure and would produce junk in the assembler.
   5 !
   6 ! Contributed by Francois-Xavier Coudert <fxcoudert@gcc.gnu.org>
   7 !
   8       subroutine foo (proc, z)
   9         external proc
  10         real proc, z
  11         if ((proc(z) .ne. abs (z)) .and.
  12      &      (proc(z) .ne. alog10 (abs(z)))) call abort ()
  13         return
  14       end
  15
  16         external cos
  17         interface
  18           function sin (a)
  19             real a, sin
  20           end function sin
  21         end interface
  22
  23
  24         intrinsic alog10
  25         real x
  26         x = 100.
  27 ! The reference here would prevent the actual arg from being seen
  28 ! as an intrinsic procedure in the call to foo.
  29         x = -abs(x)
  30         call foo(abs, x)
  31 ! The intrinsic function can be locally over-ridden by an interface
  32         call foo(sin, x)
  33 ! or an external declaration.
  34         call foo(cos, x)
  35 ! Just make sure with another intrinsic but this time not referenced.
  36         call foo(alog10, -x)
  37       end
  38
  39       function sin (a)
  40         real a, sin
  41         sin = -a
  42         return
  43       end
  44
  45       function cos (a)
  46         real a, cos
  47         cos = -a
  48         return
  49       end