similar to: [LLVMdev] Re: LLVMdev digest, Vol 1 #292 - 4 msgs

Hi llvmer, I am trying to learn how to use llvm. My question is described as the following, there has already a testcase code, and I get bytecode by using llvmgcc. What I want to do is to insert a call funcation into each basic block, which is for statistic some information. 1) I implement call function in another c/cpp file and can I insert the external call function to existed bytecode ? if it

> What I want to do is to insert a call funcation into each basic > block, which is for statistic some information. I recommend that you look at the various pieces of code under llvm/lib/Transforms/Instrumentation, e.g. BlockProfiling.cpp and TraceBasicBlocks.cpp. They do essentially the same thing as you are trying to do. > 1) I implement call function in another c/cpp file and >

Hi , I am using LLVM for my Post Graduate course project on Optimization. I am trying to do some insrtumentation to the bytecode.I 've been going through your Instrumentation code for the past few days in /llvm/lib/Transforms/Instrumentation folder and finally found two ways of instrumentation : 1) injecting LLVM bytecode instructions 2) calling an external C function. I am trying both and

Hi, I need to insert new instruction into every basic block like x=1 or while loop I tried this code, but it doesn't work Type * Int32Type = IntegerType::getInt32Ty(getGlobalContext()); AllocaInst* newInst = new AllocaInst(Int32Type,"flag", Bb); Bb->getInstList().push_back(newInst); the error: void llvm::SymbolTableListTraits<llvm::Instruction,

On 7/30/13 7:44 AM, Rasha Omar wrote: > Hi, > I need to insert new instruction into every basic block like x=1 > or while loop > I tried this code, but it doesn't work > > Type * Int32Type = IntegerType::getInt32Ty(getGlobalContext()); > AllocaInst* newInst = new AllocaInst(Int32Type,"flag", Bb); > Bb->getInstList().push_back(newInst); The problem is

Thank you for your help I tried Instruction* p=&( Bb->front()); Type * Int32Type = IntegerType::getInt32Ty(getGlobalContext()); AllocaInst* newInst = new AllocaInst(Int32Type,"flag", p); that works well but I need to store the value of the variable too. What's the method that could be used to store specific value?? On 30 July 2013 16:01, John Criswell

In order to get more information on IO performance problems I created the script below: #!/usr/sbin/dtrace -s #pragma D option flowindent syscall::*write*:entry /pid == $1 && guard++ == 0/ { self -> ts = timestamp; self->traceme = 1; printf("fd: %d", arg0); } fbt::: /self->traceme/ { /* elapsd =timestamp - self -> ts; printf("

On Mon, 7 Feb 2005, Tanu Sharma wrote: > I have been trying to randomize blocks in a program and modified > "BasicBlockPlacement.cpp" for the purpose but getting segmentation > fault.I am not able to determine the problem.Can anyone please decrypt > these error messages or suggest what might be the possible cause of > failure? I'd be happy to fix this, but I need

Hi Experts, _write value ------------- Distribution ------------- count 4096 | 0 8192 |@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ 1161825 16384 | 2754 32768 |@

Hi, Can anyone tell me if there's a straighforward way to create a new BasicBlock without inserting it into a function's basic block list? I want to do this so I can create a forward reference to a block that's position in the function is not yet known. I've tried: Function function Builder builder; bb = BasicBlock::Create(function,...) bb.eraseFromParent() ... add other

On Wed, Jan 13, 2010 at 2:27 PM, James Williams <junk at giantblob.com> wrote: > Hi, > > Can anyone tell me if there's a straighforward way to create a new > BasicBlock without inserting it into a function's basic block list? I want > to do this so I can create a forward reference to a block that's position in > the function is not yet known. > > I've

I''m trying to profile the time spent in libc functions in a large build job (building Perl), and I have trouble getting ufunc and func working. (func() is not strictly needed; I was just hoping to use it in order to profile idle time.) Here''s the story. I''ve written a dtrace script to start a separate dtrace process for each invoked command: int fileid;

Hi All, I have just started using LLVM . i am facing a issue while using ilist container. Here is a struct with ilist container as its one element. typedef ilist<Instruction *> InstListType; struct list_node { int Impact; InstListType InstList; }; list_node

Hey everyone, So I have an LLVM pass that appears to run completely and work fine, and then it aborts at the very end. When exiting the final runOnFunction call, I get the following error / stack dump. I cannot figure out why this is happening for the life of me - does anyone have any ideas? I'm not trying to do any crazy deallocation or anything, it just seems like a normal pass to me.

Hello, I have a problem of generating a load instruction. The LLVM bytecode is: ------------------------ entry: ... %2 = call i32 (...)* @atoi(i8*%1) nounwind /*<- Insertpos*/ ... -- bb1: .. %5 = icmp sgt i32 %2, %i.0 ... ----------------- Now I have pb: pointer to the Value object of *%2* of bb1. Here, I want to generate a load instruction and I did it as: new LoadInst(pb,

Hi Griffin, did your pass create a data structure that holds values somehow, and forgot to delete it? Also, try running under valgrind in case this is due to a memory error of some kind. Ciao, Duncan. > So I have an LLVM pass that appears to run completely and work fine, and > then it aborts at the very end. When exiting the final runOnFunction call, > I get the following error /

Andy, I've described that issue (see below) when you were out of town... I think I am getting more context on it. Please take a look... So, in short, when the new MI scheduler performs move of an instruction, it does something like this: // Move the instruction to its new location in the instruction stream. MachineInstr *MI = SU->getInstr(); if (IsTopNode) {

On Aug 28, 2012, at 8:18 AM, Sergei Larin <slarin at codeaurora.org> wrote: > > I've described that issue (see below) when you were out of town... I think > I am getting more context on it. Please take a look... > > So, in short, when the new MI scheduler performs move of an instruction, it > does something like this: > > // Move the instruction to its new

Hello all, I really, really, really need your help. This is my third email now, please don't ignore me! I understand this must be a trivial thing, but I've ground to a halt, and REALLY need some guidance. Please see below for the context of my problem. I'm not trying to be a waste of time, but I'm desperate here. I have a getAnalysisUsage method which does the following

Hi Has anybody tell me how to create some new type qualifies in LVM? A type qualify, like "const" in C, is useful for program analysis. I hope that I can set/get the type qualify of any value in a program analysed. Or, if I could add a property to the value class and set/get the property, it is same to add some new type qualifies. So, I simply insert a "int" private