[Bug fortran/49993] arrays declared as parameter are not allocated in read-only memory

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49993

Tobias Burnus <burnus at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |burnus at gcc dot gnu.org
         Resolution|                            |FIXED

--- Comment #5 from Tobias Burnus <burnus at gcc dot gnu.org> 2011-11-04 10:59:35 UTC ---
(In reply to comment #0)
> Could gfortran be modified to allocate arrays declared in parameter in the
> rodata section? This would help detecting bugs and may even provide a slight
> performance and code size advantage.

A belated thanks for the bugreport!


(In reply to comment #4)
> This has probably been fixed by revision 180878 (PR fortran/50960).

Looks like. I get the wished-for segfault for the second program of comment 0.

The assembler also looks OK, but I have to admit that I am not really an
assembler person.

For the simpler
  module m
    integer, parameter :: xxx(*) = [1,2,3,4]
  end module m
one gets now the following:
        .globl  __m_MOD_xxx
        .section        .rodata
        .align 16
        .type   __m_MOD_xxx, @object
        .size   __m_MOD_xxx, 16
__m_MOD_xxx:
        .long   1
        .long   2
        .long   3
        .long   4

Hence, I indeed see the .rodata for the correct variable.

I close this bug now - please reopen if something is still wrong.