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. Erik
