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On Jan 7, 2008, at 10:54, Carl Friedrich Bolz wrote: > Gordon Henriksen wrote: > >> That said, the PyPy group has llvmgcroot support on a branch; you >> could ask Armin Rigo <arigo at tunes dot org> for details about >> accessing it. >> >> On his benchmarks, Armin saw an 8% speedup vs. a shadow st...

...ots function. Note that > these are not well tested and probably have holes in them, but these are > the interfaces we want to use :) How is this function actually implemented? Is there special stack-walking code emitted or does LLVM keep an extra stack of roots? Cheers, Carl Friedrich Bolz

...Using llvm-gcc would still give you LLVM's code generator which seems to be not optimal for what PyPy does (for whatever reason). Besides, PyPy cannot get rid of its own shadow-stack implementation as long as LLVM is not the leading compiler on most platforms :-). Cheers, Carl Friedrich Bolz

...if: "you just connect the GC and > it works". I'm sure that isn't the intention, but judging from some of the posts > on this mailing lists over the past months, this seems to be a common expectation. Maybe a disclaimer would make sense indeed. Cheers, Carl Friedrich Bolz

...> So perhaps those llvm-gcc GC > extensions could be put to good use after all! :) Right now using LLVM's GC features is not really helpful for us, because the benefits of having a proper stack walker disappear again due to the worse code generator of LLVM. Cheers, Carl Friedrich Bolz

On 2008-01-07, at 05:29, Jon Harrop wrote: > On Monday 07 January 2008 02:32:47 Gordon Henriksen wrote: > >> Everything described in GarbageCollection.html should now be live. >> Phew! >> > > This is wonderful news! Are there any example programs using these > GCs? The division of labor is such that the user program must provide the stack walker (in

Hi Reid, Reid Spencer wrote: > Yes, for that you need TargetData: > > http://illuvium.net/docs/doxygen/classllvm_1_1TargetData.html I feared that that would be the answer :-). We're not using the LLVM-API at the moment. We're just generating a .ll file 'by hand', e.g. via simple string operations. I guess we get what we deserve :-). Thanks for your help, Carl

> LLVM currently lacks working examples demonstrating the use of garbage > collection... Hello, if anybody has time, I would recommend putting a big disclaimer at the top of the garbage collection page that explains that, for the most part, garbage collection falls outside of LLVM's domain. Right now LLVM advertises itself as "supporting garbage collecting", which although

Hi LLVM-dev! I'm having problems figuring out how to do variable sized structs in LLVM (which are neccessary for PyPy's LLVM backend, on which I'm working). I'm trying to do the equivalent of struct array { long refcount; long length; long items[1]; }; in LLVM, where the items array can be arbitrarily long. I guess that the struct definition should

Hi, since the last few days my system crashs at startup of gdm (on system boot). If I choose runlevel 2, the system doesn't crash. I found out, that HAL is the problem. After disabling hal (chkconfig haldaemon --off) no crashes appear. The system freezes completly so I can't look into the logfiles. I removed an reinstalled hal already, but nothing changed. I tried older kernels

...he S-bit (-rw-r--r-- becomes -r-Sr--r--). As to my understanding, for Samba this would require a slight modification in smbd/dismode.c (at least this is what I read from the debug log). Anybody else ever came across this problem? Any solution, comments, thoughts... Kind regards Karsten Karsten Bolz Storage Architect Sun Microsystems GmbH Data Management Group Phone: +49 6196 9568-264 Fax: +49 6196 9568-293

Using an alloca'd variable with loads and stores would work well too. To date this is how every llvm language front end works. You would want to avoid malloc for such a purpose generally. mem2reg is nice enough to take your local load and stores and promote them to registers with PHINodes :-) On Apr 15, 2006, at 4:43 AM, Ralph Corderoy wrote: > > Hi Simon, > >>

Hi Simon, > I've read over the "LLVM Language Reference Manual" a few times, and > writing some ll code, but i'm stuck at a very basic point. How to > decrement a counter variable ? As Oscar pointed out, you need a phi-node. I read some of the published papers on LLVM before the Language Reference Manual and found them to be of use. You may also find Wikipedia's

...ytes. Etc. and always. There are also methods in LLVM to help you deal with the size of a type in bits and bytes. In particular you might want to note the following methods: Type::isSized Type::getPrimitiveSize Type::getPrimitiveSizeInBites Reid On Mon, 2005-06-20 at 13:03 +0200, Carl Friedrich Bolz wrote: > Hi LLVM-dev! > > I'm having problems figuring out how to do variable sized structs in > LLVM (which are neccessary for PyPy's LLVM backend, on which I'm > working). I'm trying to do the equivalent of > > struct array { > long refcount; &...

Hello I'm new to this "summer of code" and was planning to apply for llvm but I'm not sure what to write in my proposal? I have looked at a couple of proposal templates and most of them has an "Project Details" part. Lets say I want to implement an new and cool optimization pass for llvm, what kind of details do you want to know of: details about how I'm planning

...alf a year ago we would be very interested in collaborating with more experienced LLVMers. If you consider coming to the one week sprint but need some support for travel and accomodation costs, then please don't hesitate to mail me. Maybe we can work something out. Regards, Carl Friedrich Bolz PyPy Sprint in Heidelberg 22nd - 29th August 2005 ================================================== The next PyPy sprint will take place at the Heidelberg University in Germany from 22nd August to 29th August (both days included). Its main focus is translation of the whole PyPy interpreter to...

...parately allocated arrays so that your example becomes: %struct.array = type { int, int, int* } The third field is allocated according to the actual size needed. This is a bit more code generation but should be fairly efficient. Reid. On Tue, 2005-06-21 at 00:40 +0200, Carl Friedrich Bolz wrote: > Hi Reid, > > Reid Spencer wrote: > > Yes, for that you need TargetData: > > > > http://illuvium.net/docs/doxygen/classllvm_1_1TargetData.html > > I feared that that would be the answer :-). We're not using the LLVM-API > at the moment. We're...

On Mon, 20 Jun 2005, Carl Friedrich Bolz wrote: > I'm having problems figuring out how to do variable sized structs in LLVM > (which are neccessary for PyPy's LLVM backend, on which I'm working). I'm > trying to do the equivalent of ... > in LLVM, where the items array can be arbitrarily long. I guess that th...

...ypy/dist/pypy/doc/contact.html contributor list: http://codespeak.net/pypy/dist/pypy/doc/contributor.html have fun, the pypy team, of which here is a partial snapshot of mainly involved persons: Armin Rigo, Samuele Pedroni, Holger Krekel, Christian Tismer, Carl Friedrich Bolz, Michael Hudson, Eric van Riet Paap, Richard Emslie, Anders Chrigstroem, Anders Lehmann, Ludovic Aubry, Adrien Di Mascio, Niklaus Haldimann, Jacob Hallen, Bea During, Laura Creighton, and many contributors ... PyPy development and activities happen as an open source project...

...el free to give feedback and raise questions. contact points: http://codespeak.net/pypy/index.cgi?contact contributor list: http://codespeak.net/pypy/index.cgi?doc/contributor.html have fun, Armin Rigo, Samuele Pedroni, Holger Krekel, Christian Tismer, Carl Friedrich Bolz PyPy development and activities happen as an open source project and with the support of a consortium funded by a two year EU IST research grant. Here is a list of partners of the EU project: Heinrich-Heine University (Germany), AB Strakt (Sweden) merlinux GmbH...