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Hello, My proposal for GSoC 2018 [attachment] about improving debugging of optimized code was accepted. I will work with my mentor Vedant Kumar (vsk) through the summer to find where DI loss occurs and try to fix as many occurrences as possible. I will also be keeping a devlog here: https://gramanas.github.io/ You can check what the first steps of my project are on the latest post: https://gramanas.github.io/posts/community-bonding/ I'd love to hear any thoughts or questions you might have. Cheers, Anastasis -------------- next part -------------- A non-text attachment was scrubbed... N...

...SoC 2018 [attachment] about > improving debugging of optimized code was accepted. > > I will work with my mentor Vedant Kumar (vsk) through the summer to > find where DI loss occurs and try to fix as many occurrences as possible. > > I will also be keeping a devlog here: https://gramanas.github.io/ > > You can check what the first steps of my project are on the latest post: > https://gramanas.github.io/posts/community-bonding/ > > I'd love to hear any thoughts or questions you might have. > > Cheers, > Anastasis

...out >> improving debugging of optimized code was accepted. >> >> I will work with my mentor Vedant Kumar (vsk) through the summer to >> find where DI loss occurs and try to fix as many occurrences as possible. >> >> I will also be keeping a devlog here: https://gramanas.github.io/ >> >> You can check what the first steps of my project are on the latest post: >> https://gramanas.github.io/posts/community-bonding/ >> >> I'd love to hear any thoughts or questions you might have. >> >> Cheers, >> Anastasis > __...

...me bugs (not necessarily related to the aforementioned project) I would appreciate it. I would also like some more information about the first goal of the project, like an outline of the procedure you have in mind for gathering debug loss metrics. I'll be in llvm's IRC with the nick "gramanas" in case you want to PM me. Best regards, Anastasis [1] https://mixxx.org/wiki/doku.php/crate_enhancements [2] https://llvm.org/OpenProjects.html#llvm_optimized_debugging

...pply and check debugify of FunctionPasses since these passes are managed by Function Pass Managers created on the fly during schedulePass(). I guess we'd have to implement the FunctionPass version of Debugify and CheckDebugify. Yes, Anastasis (CC'd) has started exploring this idea: https://gramanas.github.io/posts/community-bonding/ <https://gramanas.github.io/posts/community-bonding/>. Please sync up with him before you start hacking, so you can collaborate on the design and split up work :). Now that GSoC has officially started, Anastasis needs to plan work ahead of time, so we need t...

...9; instructions. To confirm this > I did: > > $ grep "ERROR: Instruction" results | grep phi -c > > witch gives us a result of `5214' and this means that all the > instructions with missing Debug Loc are `phi' instructions. > > > [Here] https://gramanas.github.io/sroa-results.csv > > > Conclusion > ========== > > This implies SROA does a pretty good job of preserving debug values. > That is good to hear / expected, since we went though great lengths to ensure that SROA preserves variable debug info. Have you looked at...

Hi Vedant, I have tried to implement the fix you proposed, but it didn't work as expected. I created a new *Module* Pass Manager (not Function Pass Manager) and override the *add()* method like this: class DebugifyEachPassManager : public legacy::PassManager { public: void add(Pass *P) override { PassManager::add(createDebugifyPass()); PassManager::add(P);

Mhm I see now, thanks for your explanation! Son Tuan Vu On Fri, Mar 16, 2018 at 10:58 PM, Vedant Kumar <vsk at apple.com> wrote: > > On Mar 16, 2018, at 2:30 PM, Son Tuan VU <sontuan.vu119 at gmail.com> wrote: > > Hi Vedant, > > Thank you for your reply. I think I can make this debugify-each mode, but > I guess this is reserved for your GSoC project ? > >

...instructions with missing DL were `phi' instructions. To confirm this I did: $ grep "ERROR: Instruction" results | grep phi -c witch gives us a result of `5214' and this means that all the instructions with missing Debug Loc are `phi' instructions. [Here] https://gramanas.github.io/sroa-results.csv Conclusion ========== This implies SROA does a pretty good job of preserving debug values. The DExTer results are not in line with what I've found though. This might be for a number of reasons. E.g. it could score so low due to the DebugLoc loss. Also debu...

...ss*es since > these passes are managed by Function Pass Managers created on the fly > during *schedulePass()*. I guess we'd have to implement the FunctionPass > version of Debugify and CheckDebugify. > > > Yes, Anastasis (CC'd) has started exploring this idea: > https://gramanas.github.io/posts/community-bonding/. Please sync up with > him before you start hacking, so you can collaborate on the design and > split up work :). Now that GSoC has officially started, Anastasis needs to > plan work ahead of time, so we need to find a way to avoid duplicating work. >...