similar to: Preservation of CallGraph (by BasicBlockPass, FunctionPass)

I'm not sure about the old pass manager, but I think the new pass manager solves this issue. See llvm::updateCGAndAnalysisManagerForFunctionPass where it updates the call graph to be in sync with edges deleted by function passes. So I suspect the right fix is to use the new pass manager. -- Sanjoy On Mon, May 7, 2018 at 7:32 AM, Björn Pettersson A via llvm-dev <llvm-dev at

Well, do you have a patch that enables the new pass manager that we can land then? To be more serious: 1) I don't even know how to run those passes using the new pass manager even if it where enabled by default. I guess that I'm supposed to use -passes. Is there a syntax description for that option somewhere? How do I for example run -die? 2) "Use the new pass manager" does

Hi Björn, 1) The pass pipeline syntax is documented here: https://github.com/llvm-project/llvm/blob/master/include/llvm/Passes/PassBuilder.h#L378 -die is not implemented, since the new pass manager does not support BasicBlock passes. But you can use dce instead: "-passes=dce" 2) I don't have a qualified answer here, but if I recall correctly, the trouble to correctly update the

Hi, I am working on a pass to convert lib calls to intrinsic calls as discussed here: http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-January/058507.html In my first attempt I created a FunctionPass that uses CallInst::setCalledFunction to replace the callee with the appropriate intrinsic (using Intrinsic::getDeclaration). After the pass runs I get an assertion from CallGraphSCCPass:

Hi all, I am experimenting to run a pass inherited from CallGraphSCCPass. In the pass, I iterate all functions in a SCC. In each iteration, I access all arguments of a function in the following way: Function::arg_iterator PI = fun->arg_begin(), PE = fun->arg_end(); ... I have no trouble with building. However, I am troubled with "segmentation fault" when I run the pass

Hello, I have discovered a situation in which the pass manager will infinite loop. The minimal test case is below this message. The required structure of these passes is; Before requires CallGraph After requires LoopSimplify and Before I can observe this through opt: opt -load ./libBug.so -after input.bc -o output.bc I built my copy of llvm from svn revision 68820 using gcc 4.1.2 Any

See http://llvm.org/docs/GettingStarted.html#brokengcc and then try building with something OTHER than GCC 4.1.2 . ----- Original Message ---- > From: Nick Johnson <npjohnso at cs.princeton.edu> > To: LLVM Developers Mailing List <llvmdev at cs.uiuc.edu> > Sent: Monday, May 11, 2009 3:01:12 PM > Subject: [LLVMdev] Pass Manager hangs with CallGraph and LoopSimplify >

On Monday 28 January 2008 09:31:11 pm Owen Anderson wrote: > From experience, an important point that is often forgotten is that > the order of declaration of dependencies matter. If you declare that > you require pass A, and then pass B, and B doesn't preserve A, you'll > get an error like this. > > Just some advice from having had similar problems in the past.

So I got very mixed results. With the CallGraphSCCPass, both `addRequired<DominatorTreeWrapperPass>` and `addRequired<MemoryDependenceAnalysis>` fail at runtime. The LLVM core has just two CallGraphSCCPasses and neither uses neither analyses, so it's hard to find a valid example. I transformed the pass into a ModulePass, using scc_iterator as shown in CGPassManager to process

---------- Forwarded message ---------- From: Qingan Li <ww345ww at gmail.com> Date: 2011/5/30 Subject: To: llvmdev at cs.uiuc.edu Hi, I wrote an analysis pass, myPass, inherited from both ModulePass and ProfileInfo, and this pass requires the CallGraph, i.e., * class myPass : public ModulePass, public ProfileInfo { ...};* * void myPass::getAnalysisUsage(AnalysisUsage &AU) const

I've landed the patch in r324449. Before we merge this into two different Clang release branches and almost immediately release one of them, I would really like someone to confirm that this patch works well with the Linux kernel. David, if you're up for that, it would be great. Alternatively, Guenter or someone else here can help. On Tue, Feb 6, 2018 at 5:59 PM Chandler Carruth

Hi, I am writing a CallGraphSCCPass that uses LoopInfo which is a FunctionPass. However, doing so results in the following error. **** Unable to schedule 'Natural Loop Information' required by '......' **** Google led me to this page, where Devang Patel suggests implementing the addLowerLevelRequiredPasses in CGPassManager in a manner similar to MPPassManager.

Hello, I have the following sequence of passes (using --debug-pass=Structure): ... ModulePass Manager FunctionPass Manager Preliminary module verification Dominator Tree Construction Module Verifier MyModulePass0 MyAnalysis Basic CallGraph Construction MyModulePass1 MyAnalysis MyModulePass2 Basic CallGraph Construction Call Graph SCC Pass

Hi, I'm trying to use CallGraphSCCPass, but I keep getting a bus error. I can reproduce the problem quite easily using the lib/Transforms/Hello example. I simply mix in these changes: #include "llvm/CallGraphSCCPass.h" ... struct Hello : public CallGraphSCCPass { static char ID; // Pass identification, replacement for typeid Hello() : CallGraphSCCPass(&ID) {}

On Wed, Jun 8, 2016 at 9:39 AM, Daniel Berlin <dberlin at dberlin.org> wrote: > > > On Wed, Jun 8, 2016 at 4:19 AM, Sean Silva <chisophugis at gmail.com> wrote: > >> Hi Chandler, Philip, Mehdi, (and llvm-dev,) >> >> (this is partially a summary of some discussions that happened at the >> last LLVM bay area social, and partially a discussion about

Hi Paul, > I am working on a pass to convert lib calls to intrinsic calls as discussed here: http://lists.cs.uiuc.edu/pipermail/llvmdev/2013-January/058507.html this whole area is a little confusing. If you can recognize a libcall as being equivalent to an intrinsic, you could indeed turn it into an intrinsic, but on the other hand you could just directly do on it the IR transforms you want

On Wed, Jun 8, 2016 at 3:10 PM, Mehdi Amini <mehdi.amini at apple.com> wrote: > > On Jun 8, 2016, at 2:54 PM, Sean Silva <chisophugis at gmail.com> wrote: > > > > On Wed, Jun 8, 2016 at 9:39 AM, Daniel Berlin <dberlin at dberlin.org> wrote: > >> >> >> On Wed, Jun 8, 2016 at 4:19 AM, Sean Silva <chisophugis at gmail.com> wrote:

Thanks John. Does this solve the problem of analysis availability though? If I still have to run the function analyses manually, I might as well keep rolling with the CallGraphSCCPass. (I probably should have mentioned that this is what I’m using right now.) Félix > Le 2015-05-19 à 10:12:32, John Criswell <jtcriswel at gmail.com> a écrit : > > On 5/18/15 10:45 PM, Félix Cloutier

Hi All, I tried to use CallGraph in llvm by adding "AU.addRequired<CallGraph>();" in getAnalysisUsage function. But it reports an error: include/llvm/PassAnalysisSupport.h:56:39: error: ‘ID’ is not a member of ‘llvm::CallGraph’ return addRequiredID(PassClass::ID); How to use it correctly? Thanks, Haopeng

On Monday 15 March 2010 13:45:14 David Greene wrote: > On Sunday 14 March 2010 18:32:35 Chris Lattner wrote: > > This is much better than the first iteration but still has many issues. I believe I've addressed all your points with this patch except I didn't use StringRef. It doesn't appear to be useful since createPrinterPass will be sent a const std::string & and will