FYI: clang static analyzer page has moved to

Erik Cederstrand erik at
Thu Jan 6 22:59:09 UTC 2011

Den 06/01/2011 kl. 20.56 skrev Tijl Coosemans:

> On Thursday 06 January 2011 09:01:09 Erik Cederstrand wrote:
>> Den 05/01/2011 kl. 20.36 skrev Jilles Tjoelker:
>>> On Wed, Jan 05, 2011 at 05:55:45PM +0100, Ulrich Spörlein wrote:
>>>> - get IPA to work with clang, or at least file a bug
>>>> - mark functions as __dead2 (please don't do that)
>>> Why not?
>> Because the analyzer is supposed to find bugs. Only the function that
>> really doesn't return should be marked as such. If we begin spewing
>> __dead2's everywhere, it's bound to silence a valid bug somewhere
>> down the line when e.g. a conditional in a print_help() function is
>> changed subtly so it doesn't always reach exit().
> On the other hand you can't really expect the compiler/analyser to know
> what a procedure in another file does, so in that case you need __dead2
> anyway. [...]

I have high expectations of LLVM :-) LLVM already has some knowledge of what's going on in other files (see LTO) so why shouldn't it be able to detect the __noreturn__ ? All the necessary information should be readily available.


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