similar to: [LLVMdev] Dumping profile information at an arbitrary point in time

On Sat, Sep 20, 2008 at 12:12 PM, madiyaan <ahmadsharif at hotmail.com> wrote: > Hello: > > I am new to llvm. I am looking for an example somewhere, or a > walkthrough/guide on how to do runtime optimization using llvm. Ideally, I > would like to: > > 1. Compile the program from C to LLVM or native with LLVM information > embedded in the binary. > 2. Run the binary

Hi, How can I use profile information into my pass for performing some analysis. I tried something like: PassManager PassMgr = PassManager(); cl::opt<std::string> ProfileDataFile(cl::Positional, cl::desc("<llvmprof.out file>"), cl::Optional, cl::init("llvmprof.out")); PassMgr.add(createProfileLoaderPass(ProfileDataFile));

I have not made a separate pass. I have done it in single pass ie added ProfileLoaderPass , got information in PI and now I am planning to perform the analysis here itself. I was trying to print information using ProfileInfoPrinter pass but was unable to do it. namespace { class MyAna : public ModulePass { ProfileInfo *PI; public: static char ID; // Class identification, replacement

Hello: I am new to llvm. I am looking for an example somewhere, or a walkthrough/guide on how to do runtime optimization using llvm. Ideally, I would like to: 1. Compile the program from C to LLVM or native with LLVM information embedded in the binary. 2. Run the binary under LLVM's interpreter, and profile the data. I hope LLVM has support for all this, and I don't have to insert my own

Hi, Usually we disable the llvm optimizations (clang -mllvm disable-llvm-optzns ) and then use opt to run the passes till the point of interest. I don’t know of a shortcut in clang (the new PassManager will make it possible to pass an arbitrary pipeline with a string, but not there yet). — Mehdi > On Dec 31, 2016, at 11:43 AM, Alex Susu via llvm-dev <llvm-dev at lists.llvm.org> wrote:

Hi David, ----- Ursprüngliche Mail ---- > Von: David Greene <dag at cray.com> > An: llvmdev at cs.uiuc.edu > Gesendet: Dienstag, den 7. Oktober 2008, 18:14:45 Uhr > Betreff: Re: [LLVMdev] Getting target machine specific information at run-time > > On Tuesday 07 October 2008 06:57, Roman Levenstein wrote: > > Hi, > > > > I'm playing with some

Hi all, I am trying to load a profile information (llvmprof.out) which has been separately created, to get the execution count of each basic block and use it to estimate the execution count of machine basic blocks for getting how many times any instruction gets executed, for ARM specifically. The error on running the code comes as: clang: PassManager.cpp:601: void

On 10/8/10 3:15 PM, Owen Anderson wrote: > > On Oct 8, 2010, at 1:05 PM, John Criswell wrote: > >> On 10/8/10 1:29 PM, Owen Anderson wrote: >>> Hello fellow LLVM-ers, >>> >>> As those of you who follow llvm-commits have probably noticed, I've >>> been hard at work reworking our pass infrastructure to perform pass >>>

Hello LLVM-World, I have a question about dumping debug information. 1.) I have compiled an object file with visual studio and debug information. Then I used "llvm-readobj -codeview" and dumped the debug information into a file. This is working great 2.) I used clang-cl for the same task and finally dumped it again with "llvm-readobj". Worked great too. 3.) Then I used

Ah BTW... On 25.02.2010, at 17:33, ambika wrote: > ProfileInfo *PI; > PI = &getAnalysis<ProfileInfo>(); If this _in_ your pass, then you have to register the usage of this in the getAnalysisUsage() method: void getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequired<ProfileInfo>(); } Also you have to ensure that the pass you are using is executed right

Thank you for your reply. When I'm running "llvm-readobj" on an .obj file I get a result like shown in my attachment. This is very easy to read. I don't know if this is the codeview format. I would like to get this kind of debug information form a .bc file too, because I JIT them and wanted to try to build a debugger. With the file from "llvm-readobj" I see no

On Thursday 04 March 2010 01:54:55 Chris Lattner wrote: > On Mar 2, 2010, at 1:45 PM, David Greene wrote: > > This set of patches adds support for dumping IR before or after specified > > Passes. It adds the following command-line options: > > > > -print-before=<pass-option> > > -print-after=<pass-option> > > -print-before-all > >

Daniel Dunbar wrote: > Ah, in this case llvm_shutdown isn't what you are looking for. I've > never looked at the Statistic implementation so I can't be any help > here, but if you poke around starting with "llvm/ADT/Statistic.h" you > may find a way to do what you want. I looked into that already, but Statistic.h only gives me the possibility to implement tracking

> > 3.) Then I used clang-cl to generate a .bc file - but now I'm not able to > use "llvm-readobj" anymore. Is there any tool available which can dump this > debug information too? > ​.bc is LLVM bitcode [1], not the usual object file. `llvm-readobj` should works only on the latter. ​[1] https://llvm.org/docs/BitCodeFormat.html -- Wei-Ren Chen (陳韋任) Homepage:

+ MLIR dev mailing list since that’s where the OrcJit I’m using is. Thanks for all the details, Lang! What you described is exactly what I’m looking for! Please, MLIR dev, let me know if this debug feature and the solution that Lang describes below is interesting for MLIR. I’ll dig more into the details then but it doesn’t seem too complicated. Thanks, Diego From: Lang Hames [mailto:lhames at

On Mon, Jul 27, 2009 at 1:43 AM, Ralf Karrenberg<Chareos at gmx.de> wrote: > Here is some example code that describes what I am doing: > > MyPass : ModulePass { > > bool runOnModule(mod) { > > for some Functions f in mod { > (do some stuff) > > ExistingModuleProvider mp(mod); > FunctionPassManager* fpm = > new FunctionPassManager(&mp); I think

On Mar 4, 2010, at 7:28 AM, David Greene wrote: > On Thursday 04 March 2010 01:54:55 Chris Lattner wrote: >> On Mar 2, 2010, at 1:45 PM, David Greene wrote: >>> This set of patches adds support for dumping IR before or after specified >>> Passes. It adds the following command-line options: >>> >>> -print-before=<pass-option> >>>

The debug information is actually still in a different format in the .bc file, it is LLVM metadata. I think the best reference for it is here: https://llvm.org/docs/SourceLevelDebugging.html#ccxx-frontend You can dump it just by disassembling the .bc file to textual IR using llvm-dis and examining the !DI* metadata nodes. You will have to run the file through llc to generate an object file to

On Oct 8, 2010, at 1:05 PM, John Criswell wrote: > On 10/8/10 1:29 PM, Owen Anderson wrote: >> Hello fellow LLVM-ers, >> >> As those of you who follow llvm-commits have probably noticed, I've been hard at work reworking our pass infrastructure to perform pass initialization/registration without static constructors. This is a boon for clients of the LLVM libraries, as

John, On Oct 8, 2010, at 1:05 PM, John Criswell wrote: >> These initialization routines must be invoked before the PassManager will be able to resolve pipelines involving your pass. For convenience, LLVM now exposes per-library batch initialization routines, i.e. initializeScalarOpts(), which initialize all the passes within a given library in a single go. > > From an ease of