On Mon, Sep 5, 2016 at 9:26 PM, Fred Wright <f...@fwright.net> wrote:
> Interesting, given that the Linux kernel *requires* optimization to build > correctly, due to some issue with macros vs. inline functions. Of course > that's gcc, not clang, and it doesn't necessarily rule out -Os. > Yes. And I was talking about gcc there. Thing about the Linux kernel is that it finds more optimizer bugs than pretty much any other code (and gets priority response from gcc devs) --- but even so, kernel code only exercises a limited portion of code gen, and other portions don't get debugged very well as a result. Also, while I've not kept track in recent years, tweaking kernel code to avoid known code gen / optimization bugs was very often a thing from the beginning through the kernel 2.x series. -- brandon s allbery kf8nh sine nomine associates allber...@gmail.com ballb...@sinenomine.net unix, openafs, kerberos, infrastructure, xmonad http://sinenomine.net
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