gcc/testsuite/gfortran.dg/warn_conversion.f90

   1 ! { dg-do compile }
   2 ! { dg-options "-Wconversion" }
   3
   4 !
   5 ! PR fortran/27866 -improve -Wconversion
   6 !
   7 SUBROUTINE pr27866
   8   double precision :: d
   9   real   :: r
  10   d = 4d99
  11   r = d                 ! { dg-warning "conversion" }
  12 END SUBROUTINE
  13
  14 SUBROUTINE pr27866c4
  15   real(kind=4)    :: a
  16   real(kind=8)    :: b
  17   integer(kind=1) :: i1
  18   integer(kind=4) :: i4
  19   i4 = 2.3              ! { dg-warning "conversion" }
  20   i1 = 500              ! { dg-error "overflow" }
  21   a = 2**26-1           ! { dg-warning "Change of value in conversion" }
  22   b = 1d999             ! { dg-error "overflow" }
  23
  24   a = i4                ! assignment INTEGER(4) to REAL(4) - no warning
  25   b = i4                ! assignment INTEGER(4) to REAL(8) - no warning
  26   i1 = i4               ! { dg-warning "conversion" }
  27   a = b                 ! { dg-warning "conversion" }
  28 END SUBROUTINE
  29
  30
  31 !
  32 ! PR fortran/35003 - spurious warning with -Wconversion
  33 ! Contributed by Brian Barnes <bcbarnes AT gmail DOT com>
  34 !
  35 SUBROUTINE pr35003
  36   IMPLICIT NONE
  37   integer(8) :: i, n
  38   n = 1_8
  39
  40   do i = 1_8,n
  41   enddo
  42 END SUBROUTINE
  43
  44
  45 !
  46 ! PR fortran/42809 - Too much noise with -Wconversion
  47 ! Contributed by Harald Anlauf <anlauf AT gmx DOT de>
  48 !
  49 SUBROUTINE pr42809
  50   implicit none
  51   integer, parameter :: sp = kind (1.0)
  52   integer, parameter :: dp = kind (1.d0)
  53   real(sp)     :: s
  54   real(dp)     :: d
  55   complex(dp)  :: z
  56
  57   s = 0                 ! assignment INTEGER(4) to REAL(4) - no warning
  58   d = s                 ! assignment REAL((8)) to REAL(4) - no warning
  59   z = (0, 1)            ! conversion INTEGER(4) to REAL(4),
  60                         ! assignment COMPLEX(4) to COMPLEX(8) - no warning
  61 END SUBROUTINE