similar to: [LLVMdev] Integrate my pass into opt?

Hi, I am new to LLVM. I want to use LLVM to instrument codes, such as function calls and basic blocks. But I don't know where to start. I wonder if there are any example codes to show how to instrument codes in the IR level? Thanks. -- zhouxu -------------- next part -------------- An HTML attachment was scrubbed... URL:

On 10/31/2011 2:53 AM, zhouxu(NUDT) wrote: > Hi, > I am new to LLVM. I want to use LLVM to instrument codes, such as > function calls and basic blocks. But I don't know where to start. I > wonder if there are any example codes to show how to instrument codes > in the IR level? First, have you read the Language Reference Manual, the Programmer's Manual, and the How

Hi Eli, I have tried that: static void registerMyPass(const PassManagerBuilder &, llvm::legacy::PassManagerBase &PM) { PM.add(new MyPass()); } static RegisterStandardPasses RegisterMyPass(PassManagerBuilder::EP_OptimizerLast, registerMyPass); It still couldn't find my pass. Regards, Soham Sinha PhD Student,

Hello, I have written a pass for the IR and I can run it with opt -load lib/LLVMMyPass.so -mypass -myarguments -S -o output.ll < output.bc I have registered my pass with the following code: static RegisterPass<MyPass> X("mypass", "MyPass Pass (with getAnalysisUsage implemented)"); How do I include the same pass in the clang driver. I tried running the pass: clang

On Dec 2, 2011, at 11:56 AM, Carl-Philip Hänsch wrote: > While trying to find a solution for this bug http://llvm.org/bugs/show_bug.cgi?id=11235 , > I came to the conclusion that the following things can happen while optimizing: > - after gvn, I get new constants which are inserted into br and add/sum/..., so there should be at least one more jump-threading and/or instsimplify > -

Hi all, I would like to add an option for LLVM 'opt' to disable a specific optimization pass from command line. The idea is to have something like: opt -O2 -disable-pass=[passname,...] Do you think it could be useful ? How should I proceed to develop it and commit changes to LLVM trunk ? Thanks for your advices and recommandations. Best Regards Seb -------------- next part

Hello, On Dec 7, 2011, at 2:07 AM, Seb wrote: > Hi all, > > I would like to add an option for LLVM 'opt' to disable a specific optimization pass from command line. > > The idea is to have something like: > > opt -O2 -disable-pass=[passname,...] > > Do you think it could be useful ? I have few questions : - Why (and when) would you us this ? - Some of the

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

Hi folks, I am wondering about the relationship clang, opt and llc. I understand that this has been asked, e.g., http://stackoverflow.com/questions/40350990/relationship-between-clang-opt-llc-and-llvm-linker. Sorry for posting a similar question again, but I still have something that hasn't been resolved yet. More specifically I am wondering about the following two approaches compiling

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

Hi, I have a module pass and I hope to use it to optimize a real-world program. I need LTO，and I have got LTO plugin. But How can I add my passes to LTO Pass. I can't find solution. What should I do? -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20200422/76d2b046/attachment.html>

Hi Everyone, How do we particular disable optimization in llvm with -O2 enabled? for example "Interprocedural Sparse Conditional Constant Propagation" Thank you ~Umesh -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20200626/ce248611/attachment.html>

Hi, I would like to run the -O1 pass sequence followed by -reg2mem from an out of tree project which uses llvm. I am using the following code snippet to do so but in some cases, my method is also vectorising the code, which doesn't happen when running the same sequence(-S -O1 -reg2mem) through opt. Can someone please help me find what I am missing? Thanks, Akash. *

Hi, I'm currently attempting to implement a pass that will hopefully run under the opt tool. Currently, I'm having some difficulties -- the sample code for the Hello pass (see http://llvm.org/docs/WritingAnLLVMPass.html) doesn't work. The first error is that the section starting 'As a while, the cpp file looks like:' omits the declaration for char Hello::ID = 0 that is

Sarah, We have Hello pass in svn at lib/Transforms/Hello This is a working example. I will update documentation to include "char Hello::ID = 0". On Jul 25, 2007, at 1:51 PM, Sarah Thompson wrote: > Hi, > > I'm currently attempting to implement a pass that will hopefully run > under the opt tool. Currently, I'm having some difficulties -- the > sample code

Hi, I am trying to locate the passes run by clang/opt when it is passed the option -O3. Can someone point me where to look at? Eventually, I want to turn off just the LoopStrengthReduction pass in the -O3 set of default passes. Thanks, Best Regards, Nitish -------------- next part -------------- An HTML attachment was scrubbed... URL:

> On Apr 10, 2017, at 5:21 PM, Craig Topper via llvm-dev <llvm-dev at lists.llvm.org> wrote: > > clang -O0 does not disable all optimization passes modify the IR.; In fact it causes most functions to get tagged with noinline to prevent inlinining It also disable lifetime instrinsics emission and TBAA, etc. > > What you really need to do is > > clang -O3 -c

Consider the example command line below $ llvm-ld -disable-opt hello.bc -l std -o hello.out Why does -disable-opt links in all the bitcode from the libstd.so into hello.out? - Sanjiv

While trying to find a solution for this bug http://llvm.org/bugs/show_bug.cgi?id=11235 , I came to the conclusion that the following things can happen while optimizing: - after gvn, I get new constants which are inserted into br and add/sum/..., so there should be at least one more jump-threading and/or instsimplify - after instsimplify, I get new constants which are inserted into br, so there

On Wed, Jul 15, 2009 at 9:32 AM, sanjiv gupta<sanjiv.gupta at microchip.com> wrote: > Consider the example command line below > > $ llvm-ld -disable-opt hello.bc -l std -o hello.out > > Why does -disable-opt links in all the bitcode from the libstd.so into > hello.out? ... because it just disables optimization passed. It does not disable linking. ? - Devang