similar to: [LLVMdev] Identifying loop variables

On Mon, Jan 16, 2012 at 06:51:34AM -0500, Adarsh HV wrote: > Hi everyone, > Are there any functions to identify the initiation,condition and iteration > part of the loop? > Example: for(i=0;i<10;i++) > { > a[i]+=1; > } > I want to know the name of the variable used in the loop(i) , the > initiation(i=0), condition(i<10) and the iteration(i++) part of the

Hi everyone, I am trying to add some optimizations to LLVM's PTX backend. But i am unaware of the existing optimizations. Can you please guide me about the same? Thank You:) -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20110903/bc038a07/attachment.html>

Hello , How to execute a cuda program using llvm? More specifically, nvcc produces some temporary files during its compilation. I want to convert the .cu.cpp to .ll format and optimize it. The .cu.cpp file contains typedefs and enums used by cuda runtime and also the host part of the code and the ptx file contains the kernel definition. How can i run the program after optimization? Will Rhodin

Hi, Please let me know how to follow my pass in LLVM by Dead Code Elimination pass of LLVM. getAnalysisUsage(...) only allows me to run passes before my pass. I want to run Dead Code Elimination pass after my pass. Regards, Adarsh -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi Adarsh, to my knowledge there is no publicly available CUDA-Frontend for LLVM yet. The work of Helge Rhodin you mentioned is on the backend-side: It allows to generate PTX code from LLVM IR. It is still being maintained, although I think the currently available source code is a little outdated. There is also a PTX backend in the current version of LLVM that makes use of LLVM's

Adarsh HV wrote: > Hi, > Please let me know how to follow my pass in LLVM by Dead Code > Elimination pass of LLVM. getAnalysisUsage(...) only allows me to run > passes before my pass. I want to run Dead Code Elimination pass after my > pass. Your pass does not control that; where the PassManager is created, insert your pass, then insert the DCE pass. Nick

I want to check if the values a and b in the program alias. int main() { int *a,*b; a=(int *)malloc(sizeof(int)); b=(int *)malloc(sizeof(int)); *a=10; *b=8; return 0; } I use the below code for this (getAnalysisUsage method has been defined) AliasAnalysis::Location loc1=AliasAnalysis::Location(k1); //a AliasAnalysis::Location loc2=AliasAnalysis::Location(k2); //b AliasAnalysis::AliasResult

It contains the bitcode file(without any optimization) of the below program, void map(int *a) { *a=20; } int main(){ int *a=(int *)malloc(sizeof(int)); *a=15; map(a); return 0; } I want to check if the pointer operand of each store instruction aliases with the function's arguments. I have used below code for this, virtual void getAnalysisUsage(AnalysisUsage &AU) const {

Hi everyone. Can someone please post link to the documentation that contains details about performing basic operations like adding a new function, identifying operands of an instruction,deleting an instruction etc. Thank You:)

Hi everyone, I downloaded the latest version of LLVM PTX backend from http://www.prog.uni-saarland.de/projects/anysl and made the required changes to all the files mentioned in the README. But I get the following error when I compile it. llvm[3]: Compiling PTXBackend.cpp for Release build In file included from PTXBackend.h:70:0, from PTXBackend.cpp:36: PTXPasses.h: In constructor

Hey everybody, good news for everyone interested in the PTX backend: We decided to release the current source code under the GPL - you can find the latest tarball here: http://www.prog.uni-saarland.de/projects/anysl You will find the README in the attachment, which should hopefully answer a lot of questions concerning the implementation and the current status. If you have further questions,

I was able to solve that but still crashing with the same error saying "Unreachable executed". I have attached the output with this mail. Thanks in advance. On Thu, May 6, 2010 at 2:38 AM, Nick Lewycky <nicholas at mxc.ca> wrote: > Adarsh Yoga wrote: > >> Yes. Intially the pass was crashing when the module when the module >> verifier was running. I was able to

Yes. Intially the pass was crashing when the module when the module verifier was running. I was able to solve that and now it is crashing when the bit writer pass is running. On Wed, May 5, 2010 at 8:39 PM, Nick Lewycky <nlewycky at google.com> wrote: > On 5 May 2010 17:12, Adarsh Yoga <ayoga at umail.iu.edu> wrote: > >> Hi, >> >> I've written a pass

Hi, I've written a pass that basically does some code transformations to enable parallel execution of loops. After the transformation llvm runs BitCode Writer pass , which is aborting with Unreachable Executed error. I have attached the input llvm code and the output llvm code for reference. I am stuck at this problem for a few days now. Please let me know if you are able to find anything

Initially, tt was not a problem with the verifier, we were just inserting a wrong instruction in our pass. Also we were able to figure out the error you pointed out and our pass is running as intended!!! Thanks a lot. On Fri, May 7, 2010 at 12:02 AM, Nick Lewycky <nicholas at mxc.ca> wrote: > Adarsh Yoga wrote: > >> I was able to solve that >> > > What was wrong? I

Adarsh Yoga wrote: > I was able to solve that What was wrong? I wasn't able to reproduce it and would still like to teach the verifier whatever it missed. but still crashing with the same error saying > "Unreachable executed". I have attached the output with this mail. This time you've got: %1 = load i32** getelementptr inbounds ({ i32* }* @structobj, i64 0, i32

Adarsh Yoga wrote: > Yes. Intially the pass was crashing when the module when the module > verifier was running. I was able to solve that and now it is crashing > when the bit writer pass is running. The output is wrong in @thread_pool_init: <stdin>:44:27: error: '%4' defined with type 'i1' %5 = getelementptr i32* %4, i64 %indvar ; <i32*> [#uses=1]

My pass in LLVM generates an IR like this %5 = icmp eq i32 %4, 0 %7 = or i1 %5, %5 ;. . . Since the 'or' instruction is actually not needed(dead code), I replaced all occurences of %7 with %5. Now, the 'or' instruction should get deleted. How can I call Dead Code Elimination pass of LLVM from my pass or is there any method to remove that 'or' instruction? Thank you.

On 5 May 2010 17:12, Adarsh Yoga <ayoga at umail.iu.edu> wrote: > Hi, > > I've written a pass that basically does some code transformations to > enable parallel execution of loops. After the transformation llvm runs > BitCode Writer pass , which is aborting with Unreachable Executed error. > I have attached the input llvm code and the output llvm code for reference.

I am new to LLVM and I've a question about the optimization passes and in particular about the loop transformation passes. I've setup the LLVM tool-chain with Polly installed. The following example is causing problems with me: http://llvm.org/docs/Passes.html#indvars The input is a .c file with the following loops: # 01 Standard, N=100 for (i=0; i<N; i++) b[i] = a[i] + 5; # 02