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...ck counts are bogus values. 3. Some of the function counts (obtained from ProfileInfo::getExecutionCount(const Function*)) are incorrect i.e. they do not equal the number of times the function was invoked. Can someone please explain why I am experiencing the above problems? Thanks in advance! -Apala On 09/12/2012 09:20 PM, Alastair Murray wrote: > Hi Apala, > > On 11/09/12 11:20, apala guha wrote: >> Is it possible to associate the branch frequency counts with the basic >> blocks >> in the intermediate representation? (e.g. Can I access basic block >> freque...

...-profile-loader -O3 matmult.bc -o matmult.opt.bc (does not work) Also, I am able to avoid the inconsistency warning only for optimization levels -O3 and -O2. I get that warning when using -O1 and -disable-opt. Anyone else have this experience? Or, any ideas why the above might happen? Thanks. -Apala On 09/19/2012 08:49 AM, Alastair Murray wrote: > Hi Apala, > > Dibyendu is correct that this is likely due to pass order, but things > get a bit complicated with -O[1-9] or -std-compile-opts as they insert > early passes *before* the profiling code. > > I recommend that you...

Hi Apala, Dibyendu is correct that this is likely due to pass order, but things get a bit complicated with -O[1-9] or -std-compile-opts as they insert early passes *before* the profiling code. I recommend that you use identical optimizations to insert instrumentation and to load the profiling data. E....

...possible to associate the branch frequency counts with the basic blocks in the intermediate representation? (e.g. Can I access basic block frequencies in runOnFunction()?) Also, I was able to produce a 'llvmprof.out' file. What is the format of this file? How can I parse it? Thanks. -Apala > > > On 09/07/2012 01:25 PM, Alastair Murray wrote: > > Hi Apala, > > > > Do you mean is it possible to count branch taken/not-taken frequencies? > > > > If so then in the svn version (i.e. not 3.1) there is > > -profile-metadata-loader which sets...

...c block is part of a loop, its execution count does not match the function invocation count. Is my assumption wrong, that ProfileInfo::getExecutionCount(Function* F) is supposed to return the function invocation count? If my assumption is not wrong, is there any way to fix the results? Thanks. -Apala On 09/19/2012 09:53 AM, apala guha wrote: > Thanks everyone for the replies. After some experimentation, I found > that the order in which the passes are specified matters: > > opt -O3 -profile-loader matmult.bc -o matmult.opt.bc (works) > opt -profile-loader -O3 matmult.bc -o mat...

Hi, Is it possible to translate an OpenMP program to CUDA using LLVM? I read that dragonegg has a OpenMP front-end and LLVM has a PTX back-end. I don't know how mature these tools are. Please let me know. Thanks. -Apala Postdoctoral Scholar Department of Computer Science, University of Chicago Computation Institute, Argonne National Laboratory http://sites.google.com/site/apalaguha/home/ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/a...

...ructs are already lowered into libgomp calls before leaving DragonEgg. It's been awhile since I've loooked at it though. If you use the PTX back-end and have any issues, please don't hesitate to post to the list and cc: me at jholewinski at nvidia.com On Thu, Nov 8, 2012 at 8:05 AM, Apala Guha <aguha at uchicago.edu> wrote: > Hi,**** > > ** ** > > Is it possible to translate an OpenMP program to CUDA using LLVM? I read > that dragonegg has a OpenMP front-end and LLVM has a PTX back-end. I don’t > know how mature these tools are. Please let me know. Thank...

Hi, Is there a way to count branch frequencies using LLVM infrastructure? Thanks. -Apala Postdoctoral Scholar Department of Computer Science, University of Chicago Computation Institute, Argonne National Laboratory http://sites.google.com/site/apalaguha/home/ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/a...

Hi, I am seeing some strange function calls in the LLVM IR, such as, 'call llvm.lifetime.start'. What are these functions and why are they appearing in the IR? Thanks. -Apala

...point is, is it worth doing any optimizations when -insert-edge-profiling is specified on command line? -Prashantha -----Original Message----- From: llvmdev-bounces at cs.uiuc.edu [mailto:llvmdev-bounces at cs.uiuc.edu] On Behalf Of Alastair Murray Sent: Wednesday, September 19, 2012 7:19 PM To: apala guha Cc: llvmdev at cs.uiuc.edu Subject: Re: [LLVMdev] counting branch frequencies Hi Apala, Dibyendu is correct that this is likely due to pass order, but things get a bit complicated with -O[1-9] or -std-compile-opts as they insert early passes *before* the profiling code. I recommend that y...

Hi, Is there any way to analyze library functions using LLVM, in the same manner as source code functions? Thanks. -Apala

On 10/9/12 1:19 PM, apala guha wrote: > Hi, > > I am seeing some strange function calls in the LLVM IR, such as, 'call > llvm.lifetime.start'. What are these functions and why are they > appearing in the IR? These are LLVM intrinsics that provide information to the optimization passes. See the La...

Hi Apala, On 11/09/12 11:20, apala guha wrote: > Is it possible to associate the branch frequency counts with the basic > blocks > in the intermediate representation? (e.g. Can I access basic block > frequencies in runOnFunction()?) Profile data really needs to be loaded at a module level, bu...

...has the infrastructure in place to do so ,One way to accomplish this by implementing decompiler to convert library functions to LLVM IR and run the LLVM analyze pass over converted LLVM IR ,Then revert back from LLVM IR to your library format. Thanks ~Umesh On Thu, Oct 4, 2012 at 9:47 PM, apala guha <aguha at uchicago.edu> wrote: > Hi, > > Is there any way to analyze library functions using LLVM, in the same > manner as source code functions? > > Thanks. > -Apala > ______________________________**_________________ > LLVM Developers mailing list > LLVMd...

Hi Tim, This is C++ indeed. Basically, I am profiling the code. So, these edges that cannot be resolved at compile time present a problem. Where can I find these devirtualization optimizations that you mentioned? Thanks. -Apala On 01/01/2013 12:18 PM, Tim Northover wrote: > > Hi, > > > For example: call void %1608(%"struct.LRT::RGBAucharFrameBuffer"* > > %1604) > > > > How can I resolve the targets of these? Also, why are they appearing as > > indirect calls in the IR, whe...

...to link archives built by llvm-ar with other bitcode files, using llvm-link. But llvm-link seems unable to read files produced by llvm-ar. Also, clang seems unable to read files produced by llvm-ar. Am I doing something wrong or is this the expected behavior? Is there any work-around? Thanks. -Apala

...gh the corresponding source code does not have indirect calls. For example: call void %1608(%"struct.LRT::RGBAucharFrameBuffer"* %1604) How can I resolve the targets of these? Also, why are they appearing as indirect calls in the IR, when they are direct calls in the source? Thanks. -Apala

Hi, Is it possible to generate the PDG of a function using LLVM? I did not find much documentation on it online. Thanks. -Apala Postdoctoral Scholar Department of Computer Science, University of Chicago Computation Institute, Argonne National Laboratory http://sites.google.com/site/apalaguha/home/ -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev...

Hi, Is there any way to print the source file and line number for loops and functions in the LLVM IR (assuming everything has been compiled with -g option)? Thanks. -Apala

Hi, I had asked about LLVM debug information a while back, but was told that it is not well-maintained. Is there any way I can IR functions and loops with their source code positions? Thanks -Apala