[Bug fortran/104609] New: Add gfortran option to force single-precision constants to double-precision constants

[Bug fortran/104609] New: Add gfortran option to force single-precision constants to double-precision constants

[dshi at synopsys dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104609

            Bug ID: 104609
           Summary: Add gfortran option to force single-precision
                    constants to double-precision constants
           Product: gcc
           Version: 9.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dshi at synopsys dot com
  Target Milestone: ---

need gfortran front-end to be enhanced through one option to support non-double
real constants like 1.0 to be treated as double precision when default real
kind is 4 bytes. 
This will be helpful to keep consistent behavior like the option '-fpconstant'
of Intel Fortran compiler (description: Tells  the  compiler that
single-precision constants assigned to double-precision variables should be
evaluated in double  precision.)

[Bug fortran/104609] Add gfortran option to force single-precision constants to double-precision constants

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104609

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Severity|normal                      |enhancement

[Bug fortran/104609] Add gfortran option to force single-precision constants to double-precision constants

[anlauf at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104609

anlauf at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2022-02-21
     Ever confirmed|0                           |1
             Status|UNCONFIRMED                 |WAITING

--- Comment #1 from anlauf at gcc dot gnu.org ---
Please read the documentation about available options and be aware of the
risks associated with them:

https://gcc.gnu.org/onlinedocs/gfortran/Fortran-Dialect-Options.html

There is -freal-4-real-8 and -fdefault-real-8, but do not expect support
beyond these.

[Bug fortran/104609] Add gfortran option to force single-precision constants to double-precision constants

[dshi at synopsys dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104609

--- Comment #2 from Deng Shi <dshi at synopsys dot com> ---
I know the option -freal-4-real-8, but this options affects both REAL variable
and constant. While this request is to one option ONLY applied for REAL
constant number like 1.0.