similar to: [LLVMdev] GSoC 2012 Ideas - Alias Analysis

On 3/30/12 7:07 PM, Douglas do Couto Teixeira wrote: > Hi guys, > > I'm an undergraduate computer science student and I've been working > with pointer analysis this semester under the orientation of professor > Calvin Lin, at The University of Texas at Austin. I'm interested on > helping to develop LLVM's alias analysis infrastructure. I have two > ideas for a

Hi John, thanks for your feedback. I'll try to answer your comments bellow. On Mon, Apr 2, 2012 at 10:59 AM, John Criswell <criswell at illinois.edu> wrote: > On 3/30/12 7:07 PM, Douglas do Couto Teixeira wrote: >> >> Hi guys, >> >> I'm an undergraduate computer science student and I've been working >> with pointer analysis this semester under

> Ok. I think the most important thing to keep in mind, if you want > this to be useful for LLVM, is for it to be sound in the presence of > incomplete programs. I think it would be very interesting to have a > BDD based analysis in LLVM, it would be useful for performance > comparisons and many other things, even if it isn't turned on by > default. However, it must

On Wed, Mar 23, 2011 at 6:24 PM, John Criswell <criswell at illinois.edu> wrote: > > > On 3/23/11 8:06 AM, Douglas do Couto Teixeira wrote: > > > > the execution of a program. Thus, for each integer variable, a range > > analysis determines its lower and upper limits. A very simple range analysis > > > would, for instance, map each variable to the limits

Dear LLVM community, I would like to contribute to LLVM in the Google Summer of Code project. My proposal is listed below. Please let me know your comments. Adding Range Analysis to LLVM Abstract The objective of this work is patch our implementation of range analysis into LLVM. I have a running implementation of range analysis in LLVM, but it is not currently part of the main distribution. I

Hi Douglas, On 21.02.2011 20:27, Douglas do Couto Teixeira wrote: > My work is not part of the LLVM mainline yet. But I would be happy to > contribute with the code of my range analysis implementation if it can help > you in something else. We were thinking of adding VRP to LLVM too, though we were mostly interested in Patterson's approach (i.e. not connected with SSI form). It

On Mon, Jan 24, 2011 at 3:01 PM, Nick Lewycky <nicholas at mxc.ca> wrote: > On 01/24/2011 04:41 AM, Douglas do Couto Teixeira wrote: > >> Hi, >> >> Nick, thanks for the reply. >> I still have a problem: I only need to "clone" an Instruction, changing >> its type. That is, I would like to keep all characteristics of the old >> Instruction

Dear Douglas, Comments below. On 3/23/11 8:06 AM, Douglas do Couto Teixeira wrote: > Dear LLVM community, > > I would like to contribute to LLVM in the Google Summer of Code > project. My proposal is listed below. Please let me know your comments. > > > Adding Range Analysis to LLVM > > > > Abstract > > The objective of this work is patch our

Hi, Nick, thanks for the reply. I still have a problem: I only need to "clone" an Instruction, changing its type. That is, I would like to keep all characteristics of the old Instruction and create a new one only with a different type. I am trying create a new Instruction thus: %3 = add nsw i32 %1, %2 ; <i16> [#uses=2] //Old Instruction Value* Op0 = I->getOperand(0); Value*

Can't read your paper because the permission is not set. Chuck On 2/25/2011 12:16 PM, Douglas do Couto Teixeira wrote: > Hi, Andrey, > > sorry for the delay: I made a page with the code available for > download: > http://homepages.dcc.ufmg.br/~douglas/projects/RangeAnalysis/RangeAnalysis.html >

Hi, Andrey, sorry for the delay: I made a page with the code available for download: http://homepages.dcc.ufmg.br/~douglas/projects/RangeAnalysis/RangeAnalysis.html Feel free to get it, and if you need some help, I will be happy to tell you how to set the analysis up, in case the explanation in the page is not good. I also have a report describing the implementation here: (

Hi everybody, I saw that there are some instructions in the programs in which the flag nsw or nuw is placed. I wonder what rules does LLVM follows to put these flags in some instructions. Best, Douglas -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110112/e696af22/attachment.html>

Hi, guys, Thanks a lot for your help. As you know, I am trying to implement something to change the types of the instructions. And I chose the trunc's approach because it seems be simple. But I still have some problems and questions. Would be great if you can help me. I have used the results of my range analysis implementation to change the intermediate representation. I am using

Hi guys, I have an analysis that is able to answer questions like this: given an integer variable, what is the interval of values that this variable can assume during the program's execution? I want to integrate this analysis into LLVM and it seems LVI (Lazy Value Info) is the best place to do this kind of stuff. Can someone give some hints about what I have to do to integrate my analysis

Hello guys, I wonder how I can change the type of an integer variable. For instance, given the instruction "%3 = add i32 %1, %2" I would like to alter the instruction to "%3 = add i16 %1, %2". Is there any way to do this? Best wishes, Douglas -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi, I was looking at the LLVM's alias analysis documentation (http://llvm.org/docs/AliasAnalysis.html#exist) and it seems that poolalloc has ds-aa and steens-aa. However, I followed the instructions to use these passes, but I wasn't able to use them. Also, I found this: http://old.nabble.com/DSA-or-rDSA---td32576486.html saying that they were removed from poolalloc. Is that true? If so,

Hi Andrey, > On 21.02.2011 20:27, Douglas do Couto Teixeira wrote: >> My work is not part of the LLVM mainline yet. But I would be happy to >> contribute with the code of my range analysis implementation if it can help >> you in something else. > We were thinking of adding VRP to LLVM too, though we were mostly > interested in Patterson's approach (i.e. not

Hi all, I would like to compile the benchmarks in the SPEC CPU2006 using different compilers and then see the differences in performance in the code generated by these compilers. One of these compilers is LLVM. So, I'd like to know how to compile and execute the programs in the SPEC CPU2006 using LLVM. I already did it by configuring the SPEC as an external project in the LLVM test suite but

Hi guys, I have a pass called "MyPass". And I can run this pass in the LLVM test suite programs and produce a report with the statistics of the execution of this pass. Now, I would like to run the programs in LLVM test suite and generate a report comparing the results obtained without using the pass with the results obtained using the pass. Is there any way to do this? Thank you,

On 1/24/11 12:05 PM, Douglas do Couto Teixeira wrote: > > > On Mon, Jan 24, 2011 at 3:01 PM, Nick Lewycky <nicholas at mxc.ca > <mailto:nicholas at mxc.ca>> wrote: > > On 01/24/2011 04:41 AM, Douglas do Couto Teixeira wrote: > > Hi, > > Nick, thanks for the reply. > I still have a problem: I only need to "clone" an