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Hi Alex, > On 9 Dec 2016, at 01:52, Alex Susu via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > > Hello. > I read on page 4 of https://urldefense.proofpoint.com/v2/url?u=http-3A__www.cs.fsu.edu_-7Ewhalley_cda5155_chap4.pdf&d=CwIGaQ&c=Hw-EJUFt2_D9PK5csBJ29kRV40HqSDXWTLPyZ6W8u84&r=OWKUiguzzd2_T_K4Ka0qDEQ1sz6uNXO3VsbQDbiA6R8&m=qBOLs4N_Wqx6PzrOly6PAZyiapHyxBMIhn3E9OkjYjc&s=oukhOwlS56XWO6LLHzfUbAUVUvWNyAQ4nEcCxOOqeCs&e= that gather and scatter operations exist for Mips, named LVI and SVI, respecti...

Inspired by https://www.agner.org/optimize/instruction_tables.pdf, which gives us the latency and reciprocal throughput of each instruction in the different architecture of X86, Is there anybody taking the effort to do a similar job for LLVM IR? Thanks! -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pip...

...t to (by the admin removing 2048-bit groups in /etc/ssh/moduli). There's currently no way to ensure 100% that 2048-bit DH is disabled. - Joe [1] See NIST Special Publication 800-57, Part 1, Revision 4, p. 53, <http://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-57pt1r4.pdf>.

Hello. I read on page 4 of http://www.cs.fsu.edu/~whalley/cda5155/chap4.pdf that gather and scatter operations exist for Mips, named LVI and SVI, respectively. Did anyone think of implementing in the LLVM Mips back end (part of the MSA vector instructions) gather and scatter operations? If so, can you share with me the TableGen spec? (I tried to start from LD_...

...uot;delinearize" array element accesses to recover the subscripts in each dimension of the array. I believe that the current implementation of delinearization is based on this paper: https://urldefense.proofpoint.com/v2/url?u=http-3A__web.cse.ohio-2Dstate.edu_-7Epouchet.2_doc_ics-2Darticle.15a.pdf&d=DwIFAw&c=jf_iaSHvJObTbx-siA1ZOg&r=aihobyOnVzXW7OPSK1-NiSYQkq7oP3ZSUVc4BemvrVo&m=46eKxI_sFjjeBzn7X-OLXSEUwHN-HVCD16TF9OuyIqc&s=nraVp9R56UlYi0We27kmGSjZGnM296r0HFpbRR62Fzs&e= . This paper describes how to delinearize the subscripts, and as a last step it requires certain co...

...le codebase and could essentially compile all of our C/C++ code as single file if there was a way to tell clang that it is seeing the whole program. Any thoughts on how we could achieve this? This slidedeck suggests using llvm-link to accomplish this: http://llvm.org/devmtg/2013-11/slides/Gao-LTO.pdf. Is this the most promising way forward? Thanks, Ed -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20150716/0b9f7e20/attachment.html>

...dependent edges of those operands as necessary, and branches that generate those edges. (IE for each block in RDF(useful block): mark terminator of block as useful FWIW, Keith Cooper's slide deck on this has a nice explanation: https://www.cs.rice.edu/~keith/512/2011/Lectures/L04Dead-1up.pdf<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.cs.rice.edu_-7Ekeith_512_2011_Lectures_L04Dead-2D1up.pdf&d=CwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=lFyiPUrFdOHdaobP7i4hoA&m=85DfLWatM6urqzYLUvrWBgn5LKUxCbQ3YheI3kh5XdU&s=C3xP_URm9hGCDdAsg-pKQsJ6sWhEVYgyYAGKbhC6ENU&e=>...

...ine: 3, Column: 0 } Function: main Args: - NumStackBytes: '24' - String: ' stack bytes in function' ... […] For more information about optimization remarks I suggest Adam’s talk: https://llvm.org/devmtg/2016-11/Slides/Nemet-Compiler-assistedPerformanceAnalysis.pdf Cheers, — Francis > > Thanks, > > MartinO > > _______________________________________________ > LLVM Developers mailing list > llvm-dev at lists.llvm.org > http://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev

...the IR? What other >> architectures (except x86) has support for masked read/writes? >> >> >> ARM SVE might also fall into this category. >> >> >> >> - >> >> >> Reference:https://llvm.org/devmtg/2015-04/slides/MaskedIntrinsics.pdf >> <https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_devmtg_2015-2D04_slides_MaskedIntrinsics.pdf&d=DwMF-g&c=slrrB7dE8n7gBJbeO0g-IQ&r=O_4M49EtSpZ_-BQYeigzGv0P4__noMcSu2RYEjS1vKs&m=ttZjwoTRuUQgVSd_8PZOPypfqqn-GiNqAl9WLpPxiAk&s=o2U9j6XECBRnTOcqSIRQT-dWi8owoO8...

...e/nomask_readwrite: Is it a good idea to implement a pragma that will generate mask intrinsics in the IR? What other architectures (except x86) has support for masked read/writes? ARM SVE might also fall into this category. * Reference:https://llvm.org/devmtg/2015-04/slides/MaskedIntrinsics.pdf LLVM has mask intrinsics for targets with AVX, AVX2, AVX-512. >From Slides: ”Most of the targets do not support masked instructions, optimization of instructions with masks is problematic, avoid introducing new masked instructions into LLVM IR” * aligned/unaligned: Is it worthwhile to ha...

...dependent edges of those operands as necessary, and branches that generate those edges. (IE for each block in RDF(useful block): mark terminator of block as useful FWIW, Keith Cooper's slide deck on this has a nice explanation: https://www.cs.rice.edu/~keith/512/2011/Lectures/L04Dead-1up.pdf<https://urldefense.proofpoint.com/v2/url?u=https-3A__www.cs.rice.edu_-7Ekeith_512_2011_Lectures_L04Dead-2D1up.pdf&d=CwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=lFyiPUrFdOHdaobP7i4hoA&m=85DfLWatM6urqzYLUvrWBgn5LKUxCbQ3YheI3kh5XdU&s=C3xP_URm9hGCDdAsg-pKQsJ6sWhEVYgyYAGKbhC6ENU&e=>...

...e/nomask_readwrite: Is it a good idea to implement a pragma that will generate mask intrinsics in the IR? What other architectures (except x86) has support for masked read/writes? ARM SVE might also fall into this category. * Reference:https://llvm.org/devmtg/2015-04/slides/MaskedIntrinsics.pdf<https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_devmtg_2015-2D04_slides_MaskedIntrinsics.pdf&d=DwMF-g&c=slrrB7dE8n7gBJbeO0g-IQ&r=O_4M49EtSpZ_-BQYeigzGv0P4__noMcSu2RYEjS1vKs&m=ttZjwoTRuUQgVSd_8PZOPypfqqn-GiNqAl9WLpPxiAk&s=o2U9j6XECBRnTOcqSIRQT-dWi8owoO8q0xKOEW6f8...

Dear Developers, I am a Master's student at the ECE department of the University of Florida, USA.​​ For my research project, supervised by Prof. Mark Tehranipoor<http://tehranipoor.ece.ufl.edu/> and Prof. Farimah Farahmandi<http://farimah.ece.ufl.edu/>, I need to use Clang LLVM DataflowSanitizer library in KLEE. However, I have faced some difficulties (explained below) while

...array > element accesses to recover the subscripts in each dimension of the array. > I believe that the current implementation of delinearization is based on > this paper: > https://urldefense.proofpoint.com/v2/url?u=http-3A__web.cse.ohio-2Dstate.edu_-7Epouchet.2_doc_ics-2Darticle.15a.pdf&d=DwIFAw&c=jf_iaSHvJObTbx-siA1ZOg&r=aihobyOnVzXW7OPSK1-NiSYQkq7oP3ZSUVc4BemvrVo&m=46eKxI_sFjjeBzn7X-OLXSEUwHN-HVCD16TF9OuyIqc&s=nraVp9R56UlYi0We27kmGSjZGnM296r0HFpbRR62Fzs&e= > . > > This paper describes how to delinearize the subscripts, and as a last step > it...

...essary, and branches that generate those edges. > > (IE > > for each block in RDF(useful block): > mark terminator of block as useful > > > FWIW, Keith Cooper's slide deck on this has a nice explanation: > https://www.cs.rice.edu/~keith/512/2011/Lectures/L04Dead-1up.pdf > > We might be able to do this without precomputing an RDF, however. For > example, you could solve a data-flow problem on the reverse CFG, where for > each block you solve for the "next" live instruction. Then a branch is > alive only if the next live instruction for each...

...dependent edges of those operands as necessary, and branches that generate those edges. (IE for each block in RDF(useful block): mark terminator of block as useful FWIW, Keith Cooper's slide deck on this has a nice explanation: https://www.cs.rice.edu/~keith/512/2011/Lectures/L04Dead-1up.pdf We might be able to do this without precomputing an RDF, however. For example, you could solve a data-flow problem on the reverse CFG, where for each block you solve for the "next" live instruction. Then a branch is alive only if the next live instruction for each successor is different....

...-dimensional arrays in nested loops, it needs to "delinearize" array element accesses to recover the subscripts in each dimension of the array. I believe that the current implementation of delinearization is based on this paper: http://web.cse.ohio-state.edu/~pouchet.2/doc/ics-article.15a.pdf. This paper describes how to delinearize the subscripts, and as a last step it requires certain conditions to be met in order to validate that the delinearized indexes are correct. The `tryDelinearize` function in `DependenceAnalysis.cpp` appears to be checking for cases where these conditions can...

...ction splitting is a well known compiler transformation primarily targeting improved code locality to improve performance. LLVM has a middle-end, target agnostic hot cold splitting pass<https://urldefense.proofpoint.com/v2/url?u=https-3A__llvm.org_devmtg_2019-2D10_slides_Kumar-2DHotColdSplitting.pdf&d=DwMFaQ&c=5VD0RTtNlTh3ycd41b3MUw&r=KfYo542rDdZQGClmgz-RBw&m=-cUmMKRcOXZHF-PpVxO_Dfg2mkIgP4L_QomIwDizeEE&s=xfh7APIZXGJikzsEVba8f1JsDG3aMqQCrlbanFKDvsI&e=> as well as a partial inlining pass<https://github.com/llvm/llvm-project/blob/master/llvm/lib/Transforms/IPO/Partia...

...n nested loops, it needs to "delinearize" array > element accesses to recover the subscripts in each dimension of the array. > I believe that the current implementation of delinearization is based on > this paper: >  http://web.cse.ohio-state.edu/~pouchet.2/doc/ics-article.15a.pdf > . > > This paper describes how to delinearize the subscripts, and as a last step > it requires certain conditions to be met in order to validate that the > delinearized indexes are correct. The `tryDelinearize` function in > `DependenceAnalysis.cpp` appears to be checking for ca...

...lease tell me what are these lines exactly trying to say. Could you please tell me what algorithm is the LLVM loop vectorizer using (maybe the algorithm is described in a paper) - I currently found only 2 presentations on this topic: http://llvm.org/devmtg/2013-11/slides/Rotem-Vectorization.pdf and https://archive.fosdem.org/2014/schedule/event/llvmautovec/attachments/audio/321/export/events/attachments/llvmautovec/audio/321/AutoVectorizationLLVM.pdf . Thank you very much, Alex