similar to: [LLVMdev] Detect if a basicblock is part of a loop

Rinaldini, What exactly did you run? Specifically, you may be missing some analysis passes that are necessary for LoopInfo to have the loop information you desire. -Hal On Thu, 26 Apr 2012 14:02:04 +0000 Rinaldini Julien <julien.rinaldini at heig-vd.ch> wrote: > Hi, > > I'm trying to detect if a basicblock is part of a loop or not. > > I tried the llvm::LoopInfo

Hi Rinaldini, In order to find information about loops inside a given function you should use something like "LoopInfo *LI = P->getAnalysis<LoopInfo>()", remembering to add "AU.addRequired<LoopInfo>();" to your getAnalysisUsage method. If the function you are interested to is not located in the module being compiled (if you created it as an auxiliary function,

Hi, Depending on what have run before your pass, the loop may have been unrolled or simplified if the computation inside the loop is too simple. Cheers, -- Arnaud de Grandmaison ________________________________________ From: llvmdev-bounces at cs.uiuc.edu [llvmdev-bounces at cs.uiuc.edu] On Behalf Of Cristianno Martins [cristiannomartins at gmail.com] Sent: Thursday, April 26, 2012 5:52 PM To:

On 2/28/11 4:43 PM, Devang Patel wrote: > > On Feb 28, 2011, at 2:35 PM, Naznin Fauzia wrote: > >> Hi all, >> >> How Can I get the Loops around an Instruction? >> >> I know I can get the basic block of an instruction using >> inst.getParent() which returns a BasicBlock*. Now I want to use the >> getLoopFor(BasicBlock) method of the class

Thanks Devang and John. My pass is actually a loop pass, not a function pass. So, I couldnt override the getAnalysisUsage. I am in a loop pass, I know the outermost loop. Now How can I get the loopInfo from here? I couldn't find helpful methods in the LoopInfo class documents. On Mon, Feb 28, 2011 at 5:52 PM, John Criswell <criswell at illinois.edu>wrote: > On 2/28/11 4:43 PM,

Hi all, How Can I get the Loops around an Instruction? I know I can get the basic block of an instruction using inst.getParent() which returns a BasicBlock*. Now I want to use the getLoopFor(BasicBlock) method of the class LoopInfo. But I dont know how to get the LoopInfo. BasicBlock* bb = inst.getParent(); (... what should I add here?) Loop* innerloop = LI -> getLoopFor(bb): Thanks.

On Mon, Feb 28, 2011 at 6:04 PM, Naznin Fauzia <laboni14 at gmail.com> wrote: > Thanks Devang and John. My pass is actually a loop pass, not a function > pass. So, I couldnt override the getAnalysisUsage. > A LoopPass is no different from a FunctionPass here. You can use getAnalysisUsage and getAnalysis in a LoopPass. > I am in a loop pass, I know the outermost loop. Now How

On Feb 28, 2011, at 2:35 PM, Naznin Fauzia wrote: > Hi all, > > How Can I get the Loops around an Instruction? > > I know I can get the basic block of an instruction using inst.getParent() which returns a BasicBlock*. Now I want to use the getLoopFor(BasicBlock) method of the class LoopInfo. > But I dont know how to get the LoopInfo. > > BasicBlock* bb =

> On 24 Mar 2015, at 14:55, Aaron Ballman <aaron at aaronballman.com> wrote: > > On Tue, Mar 24, 2015 at 9:48 AM, Rinaldini Julien > <julien.rinaldini at heig-vd.ch> wrote: >> Hi, >> >> I want to *tag* some functions with some *flags*. I was using annotate((“myFlag”)) and everything was working fine until I tried on ObjC method. It seems that clang just

Hi, I have a question about the llvm passes. I'm iterating over a basicblock and I can get an instruction and print it. Now, I want to iterate over the instruction and be able to modify the values of the instruction. For example, if my instruction is an add "<result> = add i32 4, %var" I want to transform it in a sub "<result> = sub i32 4, %var". I looked up

Hi, I'm writing a pass that implements a jump table with an array of blockaddress and an indirectbr instruction. It get a blockaddress in the array (via getelementptr and an index) and then jump to this basicblock via the indirectbr. I tried to compile several libraries to test my pass and the run their test-suite. It works fine with, for e.g, libTomCrypt (in -O0,1,2,3). With GMP or

>> // Increment loop variable and jmp >> BuildMI(*MBB_erase, MBB_erase->end(), db, >> TII->get(X86::ADD64ri32),reg).addReg(reg).addImm(8); > > It looks like this instruction is defining virtual register "reg" the second time. Thx for your answer... Why would it define it again? I just want to use this register and add something to it... Cheers

Hi, I want to *tag* some functions with some *flags*. I was using annotate((“myFlag”)) and everything was working fine until I tried on ObjC method. It seems that clang just ignore it. So, to be able to *flag* my functions I’m trying to add a *real* attribute to clang. I’ve added a new attribute to clang in tools/clang/include/clang/Basic/Attr.td: def NoFLA : Attr { let Spellings =

Re-adding the list, below message was sent to me alone: On 11 August 2011 13:45, Rinaldini Julien <julien.rinaldini at heig-vd.ch> wrote: > Thx for all answers... > > I'll try that. But in a long term what I want to do will be a bit more complicated... It was just an example. In this case, the goal is to replace all add with sub that return the same result, like: > > var

> De : 陳韋任 [chenwj at iis.sinica.edu.tw] > Date d'envoi : mardi 8 mai 2012 11:37 > À : Rinaldini Julien > Cc: LLVM Developers Mailing List > Objet : Re: [LLVMdev] RE : svn trunk comilation error > > Hi Rinaldini, > > You probably need to illustrate what your enviroment is, what revision you > checkout and how you build LLVM. I have no problem build LLVM svn here.

> De : 陳韋任 [chenwj at iis.sinica.edu.tw] > Date d'envoi : mardi 8 mai 2012 11:37 > À : Rinaldini Julien > Cc: LLVM Developers Mailing List > Objet : Re: [LLVMdev] RE : svn trunk comilation error > > Hi Rinaldini, > > You probably need to illustrate what your enviroment is, what revision you > checkout and how you build LLVM. I have no problem build LLVM svn here.

It try to put all basicblock in a switch in a loop, like that for example: int main() { if(something) somethingelse: else another; } become: int main() { while(true) { switch(var) { case 0: if(something) var+=1; else: var+=2; break; case1:

Hi, I'm having some problem with llvm-mc on a program after applying a pass: ../../../build/Release+Asserts/bin/clang -emit-llvm -c -I./testprof/ -I./src/headers/ -I../libtommath-0.42.0/ -Wall -Wsign-compare -W -Wshadow -Wno-unused-parameter -DLTC_SOURCE -O0 -DLTC_NO_ASM -DUSE_LTM -DLTM_DESC -o src/pk/asn1/der/sequence/der_encode_sequence_ex.bc

Hi ! I'm trying to modify the code in a machine function pass… I added a new basicblock and I want to add a jump to an another BB from my new BB. Here is my code : bool Obfuscation::runOnMachineFunction(MachineFunction &MF) { MachineBasicBlock *newEntry = MF.CreateMachineBasicBlock(); MF.insert(MF.begin(), newEntry); std::vector<MachineBasicBlock*> origBB;

Hello, I am trying to write a new ModulePass using LoopInfo analysis result, but it seems I misunderstand some concept about PassManager. Basically I want to keep LoopInfo analysis result alive. Here is an example showing the problem I encountered, assuming I already addRequired<llvm::LoopInfo>() in getAnalysisUsage: void foo(llvm::Function *F1, llvm::Function *F2) { llvm::LoopInfo