[Bug fortran/54234] New: -Wconversion or -Wconversion-extra should warn for CMPLX(dp,dp)

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54234

             Bug #: 54234
           Summary: -Wconversion or -Wconversion-extra should warn for
                    CMPLX(dp,dp)
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Keywords: diagnostic
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: burnus@gcc.gnu.org


When calling CMPLX with non-default-kind arguments, the compiler should warn
about the conversion, i.e. for
  CMPLX (0.1_dp, 0.1_dp)
as the expression is complex(4) while the arguments are REALs with kind=8.

There should be no warning for  cmplx (complex number).

Longer example – compile with -Wconversion -Wconversion-extra. Again, I'd
expect a warning for the CMPLX:

module fft_mod
  implicit none
  integer,       parameter :: dp=selected_real_kind(15,300)
  real(kind=dp), parameter :: pi=3.141592653589793238460
contains
  subroutine test
    integer :: x
    x = int (abs (cmplx(2.3_dp,0.1_dp)))
  end subroutine test
end module fft_mod