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

[falk at debian dot org]

------- Additional Comments From falk at debian dot org  2005-07-15 19:53 -------
(In reply to comment #9)

> I cannot seems to find a way to generate traps on overflow.

-ftrapv does not trigger on overflowing calculations that are compile-time
constant. I am unsure whether this is a bug or a feature.

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