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Re: [PATCH][4.3] Deprecate -ftrapv

> int f(int a, int b) { return 0 * (a + b); }
> 
> get the potentially trapping arithmetic folded away.  If -ftrapv is to 
> have properly defined semantics, those must include trapping if (a + b) 
> overflows in the above code.

Why?  Is there any language that requires such semantics?
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