[Bug c/17645] Add a warning for potentially unsafe unsigned operations

[pinskia at gcc dot gnu dot org]

------- Additional Comments From pinskia at gcc dot gnu dot org  2005-07-06 
02:33 -------
(In reply to comment #6)
> It looks like -ftrapv only works on signed overflow.
Yes because signed overflow is undefined.  unsigned overflow wraps by both the 
C and C++ standards.

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           What    |Removed                     |Added
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          Component|c++                         |c


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17645