[Bug c/40096] incremental pointer logic that used to work in older gcc versions

[pinskia at gcc dot gnu dot org]

------- Comment #2 from pinskia at gcc dot gnu dot org  2009-05-10 22:38 -------
This code is undefined because are there are two stores to test2 without a
sequence point.
        test2+=readvlnum(&test2);
Can be evaluated like:
tmp1 = test2;
tmp2 = readvlnum(&test2);
test2 = tmp1 + tmp2;
Or:
tmp2 = readvlnum(&test2);
tmp1 = test2;
test2 = tmp1 + tmp2;

Both are what the C/C++ standards say it could evaluate this statement.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40096