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<body><span class="vcard"><a class="email" href="mailto:eero.t.tamminen@intel.com" title="Eero Tamminen <eero.t.tamminen@intel.com>"> <span class="fn">Eero Tamminen</span></a>
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<a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Many instances of 1<<31, which is undefined in C99"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80266">bug 80266</a>
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<th>What</th>
<th>Removed</th>
<th>Added</th>
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<td style="text-align:right;">URL</td>
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<td>http://blog.llvm.org/2011/05/what-every-c-programmer-should-know.html
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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Many instances of 1<<31, which is undefined in C99"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80266#c14">Comment # 14</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - Many instances of 1<<31, which is undefined in C99"
href="https://bugs.freedesktop.org/show_bug.cgi?id=80266">bug 80266</a>
from <span class="vcard"><a class="email" href="mailto:eero.t.tamminen@intel.com" title="Eero Tamminen <eero.t.tamminen@intel.com>"> <span class="fn">Eero Tamminen</span></a>
</span></b>
<pre>(In reply to <a href="show_bug.cgi?id=80266#c10">comment #10</a>)
<span class="quote">> And as tedious as this is to mention, C99 section 6.5.7.4 does state this is
> undefined behavior. I know the "C abstract machine" is far removed from real
> problems with drivers and whatnot -- and I appreciate the awesome work you
> all do on Mesa. I just wanted to clarify that there is spec support for this
> claim.</span >
LLVM compiler site has 3 article series on issues with undefined behavior (see
URL field), it's a very good read.
Coccinelle might be able to help detection and patching of issues like this:
<a href="http://lwn.net/Articles/380835/">http://lwn.net/Articles/380835/</a></pre>
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