Re: MIT discovered issue with gcc
On Wed Nov 27, 2013 at 09:04:49, Paul Wise wrote:
> On Wed, Nov 27, 2013 at 6:44 AM, Stefan Roas wrote:
>
> > Such code has never been valid and any assumption anyone may falsely have
> > on such code is outright wrong. Such code may do anything, which includes
> > nothing so IMHO it's perfectly ok for the optimizer to throw it away.
> > After all we'd be better of not relying on something that is "undefined".
>
> The problem with that attitude is that it results in C programmers
> never fixing their code and never even knowing that it is wrong
> because the compiler never rejected their code or at the very least
> provided a warning. Not everyone knows everything about C and that is
> why we have compiler warnings. Every use of undefined behaviour should
> at minimum result in a compiler warning.
Point taken. A compiler warning would indeed be nice in those cases.
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