similar to: [LLVMdev] garbage collection

I tried to optimize the following code using opt -load-vn -sccp -dcse, but no effect. The loading and storing of unique should be removed, and branch should be statically evaluated. Any suggestions? The code: %tmp.0 = call int %acquireLock( ) ; <int> [#uses=0] store int 1, int* %unique %load = load int* %unique ; <int> [#uses=1] %Set = seteq int 1, %load ; <bool> [#uses=1]

---- Original message ---- >Date: Wed, 10 Mar 2010 22:09:22 -0800 >From: Nick Lewycky <nicholas at mxc.ca> >Subject: Re: [LLVMdev] glod plugin use >To: Swarup Kumar Sahoo <ssahoo2 at illinois.edu> >Cc: llvmdev at cs.uiuc.edu, Rafael Espindola <espindola at google.com> > >Swarup Kumar Sahoo wrote: >> Hi, >> I was trying to use gold plugin

Hi, I am interested in obtaining LLVM IR without any optimization performed on it.( IR obtained from cfrontend's AST). Is this LLVM IR in SSA form? Secondly, I want to make a transformation on this unoptimized IR, and convert it back to C. I believe llc -c does that. Thirdly, is it possible to use LLVM tool suite on LLVM IR that's not in SSA form, if we have such LLVM so.

Swarup Kumar Sahoo wrote: > Hi, > I was trying to use gold plugin to compile and run some of my passes on some large softwares like mysql, apache etc. When I compile using llvm-gcc, everything works fine. But, when I followed the instructions on http://llvm.org/docs/GoldPlugin.html#build to use gold plugin, I got errors like: > > /home/vadve/ssahoo2/local/bin/ld: error:

Hi, The getCalledFunction on CallInst is returning NULL, although it is (directly) calling a function, which is defined in the same file. ---------------------- if (CallInst* callInst = dyn_cast<CallInst>(&inst)) { std::cerr<<callInst->getCalledFunction(); } ----------------------- When ------------------ std::cerr<<*callInst ---------------- the

Hi, I was trying to use gold plugin to compile and run some of my passes on some large softwares like mysql, apache etc. When I compile using llvm-gcc, everything works fine. But, when I followed the instructions on http://llvm.org/docs/GoldPlugin.html#build to use gold plugin, I got errors like: /home/vadve/ssahoo2/local/bin/ld: error: modules/standard/libstandard.a: no archive symbol table

I was trying to call "DSGraph::computeCalleeCallerMapping" function on all caller-calle pair. But, in one case it gives an assertion failure. This is the error message I get. Processing internal callee function rt_error opt: /localhome/ssahoo2/llvm/src/lib/Analysis/DataStructure/DataStructure.cpp:2248: static void llvm::DSGraph::computeNodeMapping(const llvm::DSNodeHandle&, const

I tried with bugpoint, but it still give a large code. I have attached the bugpoint output file. ---- Original message ---- >Date: Fri, 1 Dec 2006 12:57:55 -0600 >From: "Andrew Lenharth" <andrewl at lenharth.org> >Subject: Re: [LLVMdev] DSGraph::computeCalleeCallerMapping failing >To: "LLVM Developers Mailing List" <llvmdev at cs.uiuc.edu> >

You will have to insert callinst to tracing functions immediately after the value is produced, not at the entry points. Giri code has many such examples of how to do this. Thanks, Swarup. ________________________________ From: llvmdev-bounces at cs.uiuc.edu [llvmdev-bounces at cs.uiuc.edu] on behalf of Jin Huang [54jin.huang at gmail.com] Sent: Thursday, January 02, 2014 9:47 PM To: llvmdev at

Thank you , James. But this way needs to determine whether the instruction is a LOAD/STORE ,and if I want to preserve the operations on these variables for further dynamic symbolic execution usage(just like KLEE ,but it's a static analysis ,not dynamic),I had to backtrace instructions ,this may be not very efficient if the operation is very complex! -Jin Huang 2014/1/3 Jin Huang

Yes, the latest version can be downloaded from here https://github.com/liuml07/giri . The LLVM instrumentation code is in TracingNoGiri.cpp<https://github.com/liuml07/giri/blob/master/lib/Giri/TracingNoGiri.cpp> file and runtime code in Tracing.cpp. You may need to delete other unnecessary instrumentation code which you don't need. Thanks, Swarup. ________________________________

On Sat, Aug 27, 2005 at 01:18:56PM +0100, Umar Janjua wrote: > I am interested in obtaining LLVM IR without any optimization > performed on it.( IR obtained from cfrontend's AST). Is this LLVM IR > in SSA form? This question has become a FAQ: http://llvm.cs.uiuc.edu/docs/FAQ.html#cfe -- Misha Brukman :: http://misha.brukman.net :: http://llvm.cs.uiuc.edu

Two suggestions: - Use a 64-bit operating system. - You could disable the LTO optimizations by commenting out a few lines in tools/lto/LTOCodeGenerator.cpp to determine if the problem is a pass or with LTO itself. On Wed, Oct 17, 2012 at 10:38 AM, Sahoo, Swarup Kumar <ssahoo2 at illinois.edu> wrote: > Hi, > > I was trying to build clang (svn head version) using clang-3.1

Hi Jin Huang, The updated Giri code is available at https://github.com/liuml07/giri<https://github.com/liuml07/giri.>. This will give you an idea of how to instrument the program to trace different values. You can modify the code to achieve your goals. -Swarup. ________________________________ From: Criswell, John T Sent: Thursday, January 02, 2014 2:12 PM To: Jin Huang; llvmdev at

Hi, I was trying to build clang (svn head version) using clang-3.1 version. I am building a debug version using LTO/gold plugin. It is crashing with signal 9 when trying to link the bitcode files to build the executable. I am not sure, if this is a bug or just a memory issue. Has anyone done anything similar or noticed similar behavior? Any help would be welcome. Thanks, Swarup.

Swarup Kumar Sahoo wrote: >>> Yes, ar and nm actually take -plugin option and if I pass this option, then I don't get these errors. But, llvm-gcc doesn't automatically pass this option to ar. >>> >> You probably just need to copy the gold plugin to >> $PREFIX/lib/bfd-plugins. Let me know if that works. If not I will >> check if there is a bug in

Hi, We are working on a project related to software bugs of server applications at univ of Illinois at Urbana Champaign. We need to do a survey based on lots of past bugs. It will of great help, if someone can point where I can get such a list of past and current bugs, possibly with the fixes for us to analyze. This is just a survey and there should not be any security related issues. Thanks in

> >> Yes, ar and nm actually take -plugin option and if I pass this option, then I don't get these errors. But, llvm-gcc doesn't automatically pass this option to ar. > >You probably just need to copy the gold plugin to >$PREFIX/lib/bfd-plugins. Let me know if that works. If not I will >check if there is a bug in the plugin search in binutils. There is no problem in

Hi, I found that LLVM 3.1 says Dominance frontier is deprecated. Can anyone please tell me, if there is any replacement for Dominance frontier & Postdominance frontier in LLVM? What are the options if we need to use them? Thanks, Swarup. -------------- next part -------------- An HTML attachment was scrubbed... URL:

Oh, OK. I didn't check the code. I think it only contains your flow tracking analysis code, isn't it. Our 'Giri' project was completely separate from it. Should we merge it with this or keep it as a separate project? -Swarup. ________________________________________ From: John Criswell [criswell at illinois.edu] Sent: Tuesday, January 22, 2013 12:12 PM To: Sahoo, Swarup Kumar Cc: