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[Bug fortran/51638] gfortran optimization breaks a single variable used as both input and output for subroutine call
- From: "bardeau at iram dot fr" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 03 Jan 2012 10:21:08 +0000
- Subject: [Bug fortran/51638] gfortran optimization breaks a single variable used as both input and output for subroutine call
- Auto-submitted: auto-generated
- References: <bug-51638-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51638
--- Comment #3 from Sebastien Bardeau <bardeau at iram dot fr> 2012-01-03 10:21:08 UTC ---
(In reply to comment #1)
>
> I can reproduce it with
> -O -m32
> on x86-64-linux.
Fine you can reproduce it easily.
> In terms of code validity, there are two other issues:
I definitely agree this code is not latest-Fortran-standard, but it implements
a few F77 tricks which, from my view, are not really broken by the latest
Fortran requirements. Or at least the other compilers and the other gfortran
modes did not need to break these tricks yet. So I will hurry not to change
anything in my code until you have a clear diagnostic of this bug. ;-)
Thanks for your help.