[Bug c/39311] Optimization breaks existing overflow checks

[rguenth at gcc dot gnu dot org]

------- Comment #1 from rguenth at gcc dot gnu dot org  2009-02-26 14:28 -------
In C signed overflow invokes undefined behavior so the compiler assumes signed
operations do not overflow.  Use -fwrapv or -fno-strict-overflow if you like
to program in DWIM-C.


-- 

rguenth at gcc dot gnu dot org changed:

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


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39311