Date: Wed, 30 Aug 2017 22:37:44 +0300 (MSK) From: Alexander Monakov <amonakov@...ras.ru> To: musl@...ts.openwall.com Subject: Re: open issues On Wed, 30 Aug 2017, Rich Felker wrote: > Great find. I wonder if compiler/diagnostic tool ppl are aware of this > extension to the C language that XSI imposes. It definitely affects > things like UBSan, and of course compilers' optimization based on > assumptions that UB doesn't happen. If musl is going to use this throughout the implementation, I think it should be documented somewhere: it's of course fair game to use this guarantee in implementation of interfaces that are themselves XSI-shaded, but using it to implement more basic interfaces is less obviously so. Alexander
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