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I enjoyed this presentation: http://www.linux-kongress.org/2009/slides/compiler_survey_felix_von_leitner.pdf Among other things it lists small code sequences when compiled with a small collection of compilers, including llvm 2.6. It looks like there are several fairly obvious things we could do better... -Chris

2009/11/7 Chris Lattner <clattner at apple.com>: > I enjoyed this presentation: > http://www.linux-kongress.org/2009/slides/compiler_survey_felix_von_leitner.pdf Wow, very comprehensive! Is there anyone working on vectorization? This is something that interests me, I might give it a try, just need some pointers. cheers, --renato Reclaim your digital rights, eliminate DRM, learn

2009/11/8 Chris Lattner <clattner at apple.com>: > The first step is loop dependence analysis.  This is required to determine > loop reuse information and is the basis for a lot of vectorization and > parallelization loop transformations. I suppose all dependencies can be determined with function passes and module-wide analysis. LLVM does unroll small loops, but once the number of

Renato Golin wrote: > LLVM does unroll small loops, but once the number of iterations is too > big, it does not even attempts to unroll a multiple of the iterations. Partial unrolling is supported by the unroller when using the additional -unroll-allow-partial switch (false by default). Works for me with LLVM 2.5. -- Pekka Jääskeläinen

On Nov 7, 2009, at 4:15 PM, Renato Golin wrote: > 2009/11/7 Chris Lattner <clattner at apple.com>: >> I enjoyed this presentation: >> http://www.linux-kongress.org/2009/slides/compiler_survey_felix_von_leitner.pdf > > Wow, very comprehensive! > > Is there anyone working on vectorization? This is something that > interests me, I might give it a try, just need

msz De: Fern?ndez-L?pez, Ambito Iberoamericano, Paseo de la Castellana 223, Madrid. [1]InEnglish - [2]EnEspanol Caros amigos luso-brasileiros, ? de se perguntar se as "patrulhas ideol?gicas" esquerdistas estar?o impedindo que os ?ltimos artigos do ex preso pol?tico e escritor cubano Armando Valladares - que abordam delicados aspetos das rela??es entre o regime comunista de Cuba e o atual governo brasileiro - cheguem aos grandes jornais. Por via de d?vidas, e qualquer que seja a resposta, lhes enviamos diretamente, via e-mail, o mais recen...

....7-7.el5 POSTFIX: postfix.x86_64 2:2.3.3-2.1.centos.mysql_pgsql MYSQL: mysql-server.x86_64 5.0.77-4.el5_5.4 thank's ! -- Atenciosamente; Graciously; *Lucas Possamai * http://psyscrew.posterous.com/ "Sexo? O governo d? camisinha! Engravidou? Bolsa fam?lia! Preso? Ele d? dinheiro! Agora vai estudar pra voc? v?." "Sucesso ? a capacidade de enfrentar o fracasso sem perder o entusiasmo" *INFORMA??O DE SEGURAN?A:* Este e-mail ? de uso restritamente pessoal. As informa??es nele contidas podem ser de car?ter confidencial e/ou privilegiada. Se voc...