similar to: [LLVMdev] Algorithm used for doing alias analysis.

On Sat, Feb 25, 2012 at 8:44 AM, tarun agrawal <tarun at cse.iitb.ac.in> wrote: > Hi, > > I am using alias analysis to determine whether two values are alias or not. > But I am not able to figure out the algorithm that is being used to > determine > May , Must and No Alias. Here is the algorithm in high-level: http://llvm.org/docs/AliasAnalysis.html#exist > > >

The clone llvm:CloneBasicBlock copies the phi function in the replicated basic block from the original basic block. I don't want the copy of phi in relplicated block. For now I am creating .bc file with -O0 option so that it doesn't generate phi function in first place. Is this a good approach or there are some other function available for it. Tarun On Sun, Apr 17, 2011 at 5:22 AM, Eli

Hi, I am writing a pass for constant propagation using graph restructuring ( code duplication). I am facing following difficulties.. 1) I need to replicate the basic block but without phi function in the replicated block. How can I do this. 2) I need to insert that basic block after and before some particular basic block. Regards Tarun Agrawal -------------- next part -------------- An HTML

I am using llvm-2.6 and the ConstProp.cpp file is http://llvm.org/docs/doxygen/html/ConstantProp_8cpp_source.html and the exact error message is: llvm[0]: Compiling ConstantProp.cpp for Release build (PIC) /home/tarun/Desktop/compiler/LLVM/llvm-2.6/include/llvm/Analysis/ConstantFolding.h: In member function ‘virtual bool<unnamed>::ConstantPropagation::runOnFunction(llvm::Function&)’:

On 5/3/11 4:08 PM, tarun agrawal wrote: > HI > > I know it is a very simple question not worth asking here but I am > really struggling pls help me out.. This is a question worth asking; it's just that not everyone can answer all the time. :) If all you want to do is to follow the SSA def-use chain within a single function, then this is very easy. All you have to do is use

Thanks John, I know how to iterate through def-use chains and I also have realized the need for an algorithm to do the work. But the algorithm I am able to figure out is not linear in time. It wold be a great help if someone suggest me a way to get all basic-block along all path between two instruction. On Wed, May 4, 2011 at 7:00 AM, John Criswell <criswell at illinois.edu> wrote: >

HI I know it is a very simple question not worth asking here but I am really struggling pls help me out.. On Tue, May 3, 2011 at 10:10 PM, tarun agrawal <tarun at cse.iitb.ac.in> wrote: > Hi, > > I need to get all the basic blocks that are there, in the path from > definition of an instruction to use of that instruction. > > > Regards > Tarun > --------------

On Sat, Apr 16, 2011 at 5:27 PM, tarun agrawal <tarun at cse.iitb.ac.in> wrote: > I am using llvm-2.6  and the ConstProp.cpp file is > http://llvm.org/docs/doxygen/html/ConstantProp_8cpp_source.html > > and the exact error message is: > > llvm[0]: Compiling ConstantProp.cpp for Release build  (PIC) >

On 4/16/11 7:01 PM, tarun agrawal wrote: > The clone llvm:CloneBasicBlock copies the phi function in the > replicated basic block from the original basic block. After you clone the basic block, you can probably replace the phi instruction with another value of your choice. If you're adding variables, you'll probably want to create them as allocas and use loads and stores to

Dear Tarun, It just occurred to me that this may or may not be what you are asking about. This only finds basic blocks along the def-use chain of an instruction; it does not find all basic blocks along all paths between two instructions. I don't know of an algorithm off-hand for the latter, but if you understand how to iterate over def-use chains and the control-flow graph, then

Hi, I need to get all the basic blocks that are there, in the path from definition of an instruction to use of that instruction. Regards Tarun -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110503/4d3852b7/attachment.html>

On Sat, Apr 16, 2011 at 5:07 PM, tarun agrawal <tarun at cse.iitb.ac.in> wrote: > While compiling the ConstantProp.cpp I am getting the following error. > > error: too few arguments to function ‘llvm::Constant* > llvm::ConstantFoldInstruction(llvm::Instruction*, llvm::LLVMContext&, const > llvm::TargetData*) If you're reporting a build error, please include the

On Sat, Apr 16, 2011 at 4:32 PM, tarun agrawal <tarun at cse.iitb.ac.in> wrote: > Hi, > > I am writing a pass for constant propagation using graph restructuring ( > code duplication). I am facing following difficulties.. > > 1) I need to replicate the basic block but without phi function in the > replicated block. How can I do this. > > 2) I need to insert that

On Sat, Apr 16, 2011 at 5:01 PM, tarun agrawal <tarun at cse.iitb.ac.in> wrote: > The clone llvm:CloneBasicBlock copies the phi function in the replicated > basic block from the original basic block. > I don't want the copy of phi in relplicated block. For now I am creating .bc > file with -O0 option so that it doesn't generate phi function in first > place. Is this a

Dear Tarun, Swarup Sahoo and I wrote some LLVM passes for dynamic slicing for LLVM 2.6. I believe we had planned to make the code publicly available as part of the Giri project (http://llvm.org/viewvc/llvm-project/giri/trunk), but due to other commitments, we have not moved the code into that SVN repository yet. Let me check with Vikram and Swarup to see about getting a copy of the code to you.

While compiling the ConstantProp.cpp I am getting the following error. error: too few arguments to function ‘llvm::Constant* llvm::ConstantFoldInstruction(llvm::Instruction*, llvm::LLVMContext&, const llvm::TargetData*) Regards Tarun -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi, I want to find the dynamic slice of a given code. Is this already implemented in LLVM?. If not which functions are there in the LLVM to do dynamic analysis.

Just to be clear, I have to add a function name printf in the module with no body. And I can call the function. This will automatically call the printf function which is defined in the library. Tarun Agrawal On Wed, Feb 8, 2012 at 11:34 PM, John Criswell <criswell at illinois.edu>wrote: > On 2/8/12 11:55 AM, tarun agrawal wrote: > > Hi, > > I am trying to insert a

On 2/8/12 11:55 AM, tarun agrawal wrote: > Hi, > > I am trying to insert a instruction for printf or cout. My aim is to > print a integer and a string value using that instruction, which are > already there in the code. > but I am not able to understand how to do it. Any help would be great > help. You want to insert a call instruction that calls the printf function.

Hi, I am trying to insert a instruction for printf or cout. My aim is to print a integer and a string value using that instruction, which are already there in the code. but I am not able to understand how to do it. Any help would be great help. Thanks and Regards, Tarun Agrawal -------------- next part -------------- An HTML attachment was scrubbed... URL: