similar to: [LLVMdev] Links for basic operations

Hi, Let say i am writing a code inside basic block pass and iterating all the instructions inside, and i encountered in this instruction : %3 = add i32 %1, 2 I want to convert this instruction to something like this: add R1, 2, R3 I know the opocode, but i what i need is, the operands %1 and 2 (in this example). I will be grateful if some one will tell me how to do so . -------------- next

Rotem Varon wrote: > Hi, > > Let say i am writing a code inside basic block pass and iterating all > the instructions inside, > and i encountered in this instruction : If you're asking how to get the operands of an Instruction, use the getOperand() method: Value * Operand1 = I->getOperand(0); Value * Operand2 = I->getOperand(1); The LLVM doxygen documentation

Could some kind soul point me at the documentation, or the appropriate header file, or an example of the best way to write a pass that modifies the IR? Suppose, for example, that I wanted to replace every call to the intrinsic i1 with a call to i2 followed by a call to i3: i1(X) -> i3(i2(X)) I'm currently playing around with a class that inherits from FunctionPass and InstVisitor and I

​Hi. I want to change order of code basic blocks in memory. I visited " http://llvm.org/docs/ExtendingLLVM.html" page and it advised me to ask it before any effort. What parts of LLVM help me and how? I am a newbie on LLVM. Thanks. -------------- next part -------------- An HTML attachment was scrubbed... URL:

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>

Hi, I need to write a transform pass which instruments the target program to output the name of each function executed, and the rdtsc counter along with it. Can anyone give me an idea of how to go about it?(I've worked around with LLVM pass framework and opt to do static analysis, but would like to do a lightweight instrumentation). Also can anyone give an approximate idea of the

Hi All, I am going to clean up those doxygen links on LLVM Programmer’s Manual [1], some are lost and some are too old. However, I am confused on which doxygen link I should pick up. I see there are mutiple links exist on LLVM web site for LLVM classes. Take class Statistic as example, there are: - http://llvm.org/doxygen/Statistic_8h-source.html (the oldest one, I believe it's

Hi folks, I like open technologies, epecially LLVM compiler. I want to implement a new interface layer in LLVM to plug-in optimizers as a part of GSoC, and then load the interface with optimizers. This would improve LLVM application for people who want to use their optimizations in compilers. The first "educative" step is to add Doxygen (for .h files) to the build and integrate it

On 12/7/11 4:51 PM, Nipun Arora wrote: > Hi, > > I need to write a transform pass which instruments the target program to > output the name of each function executed, and the rdtsc counter along > with it. Doing this in LLVM is really straightforward. You simply iterate through all the functions in a module and add instructions to their entry basic blocks to do whatever it is

Thanks for the info, Philip. I will update the LLVM Programmer’s Manual first. Regards, chenwj Wei-Ren Chen (陳韋任) Homepage: https://people.cs.nctu.edu.tw/~chenwj 2017-04-02 18:11 GMT+08:00 Philip Pfaffe <philip.pfaffe at gmail.com>: > Hi chenwj, > > http://llvm.org/doxygen/Statistic_8h_source.html is the correct one. The > other two are remnants from older doxygen deployments.

Hello everybody. I'm quite new to LLVM and I'm encontering problems with cloning basic blocks. My two basic blocks are in the same function and it doesn't really matter how the cloned one behave for the moment. Of course, to do so, I used the cloning.h 's method "CloneBasicBlock" but I have the "Instruction does not dominate all uses!" error. I know what it

On 3/23/2011 6:07 AM, Крылов Владислав wrote: > Hi folks, > > I like open technologies, epecially LLVM compiler. I want to implement > a new interface layer in LLVM to plug-in optimizers as a part of GSoC, > and then load the interface with optimizers. LLVM already has a plug-in framework for loading new analysis and optimization passes

Hi John, Thanks for the detailed answer, this gives me a good starting point to look into. I was also wondering if you could give an idea (in terms of %ge) the overhead one can expect with such an instrumentation. I want something really lightweight and simple which can possible be applied to production systems, so overhead is a concern. Thanks Nipun On 12/09/2011 02:21 PM, John Criswell

Please reply-all so that the thread is kept on llvmdev. The LLVM Programmer's Manual has examples of how to iterate over many common structures, such as instructions in a basic block[1]. Other than that, you can check the source code or doxygen[2]. Basically, you loop over the instructions as detailed in the programmer's manual[1], and loop over the operands using User's

On Mon, 28 Apr 2008 17:54:31 -0400, Gordon Henriksen wrote: > On Apr 28, 2008, at 17:32, Hendrik Boom wrote: > >> In http://llvm.org/docs/FAQ.html, when taking about writing a compiler >> that uses LLVM (at least I think that's what the FAQ question is >> asking), >> the FAQ recommends >> >>> # Call into the LLVM libraries code using your

On Sun, 2010-04-11 at 10:54 +0800, lucefe wrote: > Hi, Dear LLVMers > > I just touch llvm source code for several days, and I didn't know the > interfaces of the analysises and transformations of LLVM. For exampe, > how to backtrace CFG, and whether exits a backtracking interator to do > such work? > > For a novice, I also seek for suggestions about how to become

Hi , I'm working on a project in which i need to find out all free variables in a loop. I need to find all variables used inside a loop and that are not declared(allocated) in the loop. I'm confused about what symbol tables to use to get hold of such variables. Thanks, Rohith. -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi, Dear LLVMers I just touch llvm source code for several days, and I didn't know the interfaces of the analysises and transformations of LLVM. For exampe, how to backtrace CFG, and whether exits a backtracking interator to do such work? For a novice, I also seek for suggestions about how to become familiar with LLVM interfaces as soon as possible. Now I have a plan to write a pass based on

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 loop. Thank you:) -------------- next part -------------- An HTML attachment was scrubbed... URL:

Hi, I have the following instruction in my IR- %call2 = call i8* @strcpy(i8* %1, i8* %2) #2 I intend to change call to strcpy with strncpy. I have included the following code in runOnFunction, so that when it is strcpy's turn to be invoked, strncpy is invoked instead. Assuming I* is the strcpy instruction, CallInst* x=new