[Patch, Fortran] PR57697 - Fix an issue with defined assignment

[Tobias Burnus]

I have now committed (Rev. 202725) a test case for that patch. (I 
confirmed that it fails before Rev. 202609 and works now.)
See attachment.

(While trying to create a test case, I found another bug with defined 
assignment; see PR fortran/58469.)

Tobias

PS: I still have to do the backporting to 4.8. By the way, the following 
patch is still pending to be reviewed: 
http://gcc.gnu.org/ml/fortran/2013-09/msg00031.html


Thomas Koenig wrote:
>> As testing showed, it didn't fix the real-world code: ForTrilinos's
>> ForTrilinos_ADT_3D_Burgers_6th_Pade did still fail as it has:
>>
>>           *_F.DA65 = matrix_diff_x (&parm.621);
>>         _F.DA66 = ax->epetra_rowmatrix.universal; // Deref of "ax"!
>> Build and regtested on x86-64-gnu-linux.
>> OK?
> The patch is OK, also for 4.8.  Please add a test case which also
> checks for the ForTrilinos failure.
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