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...yway: if the type passed in is a union, why not simply take the union member of the appropriate type? I don't think that GCC would produce this warning unnecessarily. You are in dangerous waters. -- Andrew Haley Java Platform Lead Engineer Red Hat UK Ltd. <https://www.redhat.com> EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671

在 2018-08-10 06:20, Kim Gräsman 写道: > On Fri, Aug 10, 2018 at 12:02 AM, Jonathan Wakely <jwakely.gcc at gmail.com> > wrote: >> >> If GCC 4.9.3 thinks there's an aliasing violation it might >> misoptimise. It doesn't matter if it's right or not, it matters if it >> treats the code as undefined or not. >> >> And apparently GCC does think

...It won't work, unless the object > stored in the memory at that address was stored as the union type. > > Do not lie to the compiler or it will get its revenge. > > -- > Andrew Haley > Java Platform Lead Engineer > Red Hat UK Ltd. <https://www.redhat.com> > EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671 > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20180810/ba826ae9/attachment.html>

...essage: (XEN) AMD-Vi: IO_PAGE_FAULT: 0000:01:00.1 d0 addr fffffffdf8000000 flags 0x8 I this is the sata device: 01:00.1 SATA controller: Advanced Micro Devices, Inc. [AMD] 400 Series Chipset SATA Controller (rev 01) or on another mb 01:00.1 SATA controller: Advanced Micro Devices, Inc. [AMD] Device 43eb in the case of write operations - ie. dbench or windows guest - there are a lot of messages sometimes the filesystem goes to read-only state, and the windows guest goes bsod tested on 3 hw: 1. asus prime b450m-a, ryzen 5 2600x, md raid1, 2x samsung 1TB 860evo, lvm: problem does appear 2. asus prime...

I did some more extensive testing and found that all GCCs older than 7 trigger the warning, but only if CMAKE_BUILD_TYPE=Release (which I guess indicates optimizations are enabled). There's a patch up for disabling the warning here: https://reviews.llvm.org/D50607. I still feel a little uncomfortable, because I think Jonathan makes an excellent point -- if GCC thinks there's a

...---------------- > > Message: 4 > Date: Sat, 3 Mar 2012 20:57:08 -0500 > From: Paul Webster <paul at dabdig.com> > Subject: Re: [Icecast] Hardware-based Icecast source client > To: "icecast at xiph.org" <icecast at xiph.org> > Message-ID: <D36F2CD4-A5E4-43EB-BB90-2F71315B223F at dabdig.com> > Content-Type: text/plain; charset=us-ascii > > On 3 Mar 2012, at 21:47, Gavin Stephens <small.net.nz at gmail.com> wrote: > > > What's a plug computer? > > Something like this: > http://pogoplug.com/ > > or the l...