similar to: [LLVMdev] LLVM seg fault : dereference an uninitialized pointer Instruction*

Hello, I get a segfault and I cannot find the reason. The main computation is done in " `struct patternDC : public FunctionPass` " but I also have class ifChecker { public: virtual bool operEquiv(Instruction *I1, Instruction *I2); }; I have in bool patternDC::runOnFunction(Function &F) { ... ifChecker* CC=new ifChecker(); if (

Hello ! I want some piece of advice regarding a LLVM pass. My particular problem is: There is a method bool patternDC::runOnFunction(Function &F) { ... if ( CC->operEquiv(icmpInstrArray[i], icmpInstrArray[j]) ) {...} ... } having the array elements of type Instruction* : http://llvm.org/doxygen/classllvm_1_1Instruction.html The called method is bool

I solved by checking if(BB->size()>1) Thank you all for the help ! Now debugging the next segfault. On Thu, Dec 20, 2012 at 12:59 PM, Alexandru Ionut Diaconescu < alexandruionutdiaconescu at gmail.com> wrote: > getPrevNode<http://llvm.org/docs/doxygen/html/classllvm_1_1ilist__node.html#a77b897207ef0a1ae95c404695aed9a4b>() > Get the previous node, or 0 for the list

Yes, it sounds good. I can try tomorrow. Thank you for your advice ! On Thu, May 2, 2013 at 5:43 PM, Logan Chien <tzuhsiang.chien at gmail.com>wrote: > I think the better solution should be: > > > LLVMContext& C = is->getContext(); > Value *values[] = { > ConstantInt::getSigned(Type::getInt64Ty(C), *scsr*), > MDString::get(C, *"path"*) > };

But I don't want to map only basic blocks, I need too to map the edges "the whole CFG of the function" Save the CFG of the function in another memory address and call it for example orgCFG and change the CFG by referencing to the orgCFG Thank you for help and patience On 6 June 2013 10:59, Alexandru Ionut Diaconescu < alexandruionutdiaconescu at gmail.com> wrote: > I

Hi, I solved it. From the ConstantStruct you can call getOperand() multiple times, so "mine" as deep as you can. On Fri, Mar 1, 2013 at 1:41 PM, Alexandru Ionut Diaconescu < alexandruionutdiaconescu at gmail.com> wrote: > > Hi Sebastian, > > Thanks for the response. > > I already did this : > > I cast the entire annotated expression to Value*. Then, in

I don't use a function for do the mapping, it may be MapValue(). If it does not work, alias an int identifier for each basic block. Be aware because basic block cannot have the same name (getName) in the same function, but they might have the same name being in different functions. Therefore, take into account the function name as well. Good luck On Thu, Jun 6, 2013 at 10:55 AM, Rasha Omar

I think the better solution should be: LLVMContext& C = is->getContext(); Value *values[] = { ConstantInt::getSigned(Type::getInt64Ty(C), *scsr*), MDString::get(C, *"path"*) }; lnstr.setMetadata(*"your_analysis_name"*, MDNode::get(C, values)); So that you can take advantage of the type system of LLVM bitcode, and don't have to cast the integers from/to strings

getPrevNode<http://llvm.org/docs/doxygen/html/classllvm_1_1ilist__node.html#a77b897207ef0a1ae95c404695aed9a4b>() Get the previous node, or 0 for the list head. I don't see any method like hasPrevNode. It can be a weird problem because "current->getPrevNode()" is indicating to "current" itself (the problem appears for the BB with only one element)? On Thu, Dec

Hi Sebastian, Thanks for the response. I already did this : I cast the entire annotated expression to Value*. Then, in order to avoid ugly things like getAsString(), I check if V->getValueID() == Value::ConstantArrayVal in order to cast it to ConstantArray. Because it contains only array[0], I cast array0>getOperand(0) to ConstantStruct. Therefore, from ConstantStruct you can get all the

The problem is that I want to pass only srsr which is an int. "marked" was just an example :) Thanks you! On Thu, May 2, 2013 at 5:06 PM, Logan Chien <tzuhsiang.chien at gmail.com>wrote: > I'm not familiar with this, but maybe you can try: > > StringRef tst = ("marked" + Twine(srsr)).str(); > > It seems that you can't use integer as meta data

Map every basic block from the CFG to a set of integers. The successors from the CFG can be used to make the edges in your simplified graph. The pair (Callee,Caller) can link the CFG-s between them in a larger CFG-like. On Wed, Jun 5, 2013 at 11:03 PM, Rasha Omar <rasha.sala7 at gmail.com> wrote: > What do you mean by mapping to integers? > > > On 5 June 2013 22:32, Alexandru

I think I understood that, but what I mean is what is the function responsible to do mapping is it MapValue() in ValueMapper.h? Thanks for your help On 6 June 2013 09:54, Alexandru Ionut Diaconescu < alexandruionutdiaconescu at gmail.com> wrote: > Map every basic block from the CFG to a set of integers. The successors > from the CFG can be used to make the edges in your simplified

What do you mean by mapping to integers? On 5 June 2013 22:32, Alexandru Ionut Diaconescu < alexandruionutdiaconescu at gmail.com> wrote: > Why you don't map the basic blocks to integers and apply algorithms on the > integer graph? And construct your new CFG. > > > On Wed, Jun 5, 2013 at 10:27 PM, Rasha Omar <rasha.sala7 at gmail.com> wrote: > >> How

Try : INITIALIZE a1 if you didnt. if (cpProf EXISTS){ CallInst* newInst = CallInst::Create(cpProf,a1,""); if (BB->getTerminator() && CI) BB->getInstList().insert((Instruction*)CI, newInst); On Tue, Mar 5, 2013 at 1:04 PM, Anshul Garg <gargaa24 at gmail.com> wrote: > CallInst* newInst = CallInst::Create(cpProf,a1,""); >

However, I do have: !924 = metadata !{i32 786484, i32 0, null, metadata !"r", metadata !"r", metadata !"", metadata !841, i32 19, metadata !56, i32 0, i32 1, i32* @r} ; [ DW_TAG_variable ] [r] [line 19] [def] with on which `!0` is indirectly dependent and there is `!llvm.dbg.cu = !{!0}` . On Wed, Feb 27, 2013 at 11:35 AM, Alexandru Ionut Diaconescu <

Hello, Thank you for your answer. If I want to use then I have error: ‘NodeTy* llvm::ilist_half_node<NodeTy>::getPrev() [with NodeTy = llvm::Instruction]’ is protected error: ‘llvm::ilist_half_node<llvm::Instruction>’ is not an accessible base of ‘llvm::Instruction’ Do you know any other method to access the previous instruction of a terminator instruction? PS: back() is not an

Hi Duncan, Thank you for your response! Now it works. But I have another problem: Do you know how can I iterate through a Value*? For instance, I have : Instruction *I1; // I take only I1 that are ICmp errs()<<"\n "<<*I1->getOperand(0)<<" \n"; // %3 = load i32* %c, align 4 As expected. Now I want to get %c from the previous to use "%c" in

Hi Rasha, First, you should not erase that cloned function XD the idea is that your pass should create that new function, add it to a module (that could be the same one where the original function is, or another one that you could be creating if that is the case), and then just let it be: the pass manager should identify this new function (after your pass returned) and all the other analysis and

I found that : "Code generator passes are registered and initialized specially by TargetMachine::addPassesToEmitFile and similar routines, so they cannot generally be run from the *opt* or *bugpoint* commands."...So how I can run a MachineFunctionPass? In the end, I just want to apply a DFS on a CFG of a function. And I need oriented edges and wanted to use