similar to: [LLVMdev] how to use LoopInfo outside of LLVM

Hi, My project is outside of LLVM. Now I need get LoopInfo for a function. I know that if my project were a pass inside LLVM. I can get LoopInfo by "AU.addRequired<LoopInfo>()" and "getAnalysis<LoopInfo>()". Also I know I can get a function pass by "llvm::FunctionPass* dce = llvm::createDeadCodeEliminationPass(); dce->runOnFunction(*func)" outside of

On 3/3/11 3:09 PM, Wenbin Zhang wrote: > Hi all, > I tried to have a LoopInfo object in a function pass, add > addRequired<LoopInfo> in getAnalysisUsage, and then use > getAnalysis<LoopInfo> in runOnFunction(). It worked OK. > Now I want to have a module pass to traverse the functions, and > similarly I want to have to loop information of the functions. When I >

I think this assertion failure may be caused by the getAnalysisUsage(). Mine is like the following: class myclass : public ModulePass{ ... virtual void getAnalysisUsage(AnalysisUsage &AU) const { AU.addRequired<LoopInfo>(); } ... } Is it enough? Thanks! Best, --Wenbin ----- Original Message ----- From: Wenbin Zhang To: John Criswell Cc: llvmdev at

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,

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 John, I modify my code to like this: bool XXX::ModulePass(Module &M){ .... LoopInfo &li = getAnalysis<LoopInfo>(fi); .... } Here fi is a Function* pointing to main(). Now when I run the pass, another error shows up: AnalysisType& llvm::Pass::getAnalysisID(const llvm::PassInfo*, llvm::Function&) [with AnalysisType = llvm::LoopInfo]: Assertion `ResultPass

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 =

Hi, I wrote tiny ModulePass which iterates over functions and then uses getAnalysis<LoopInfo> in order to get informations about the loop. It compiles smoothly, but whenever I try to run it I got error like this: opt: .. PassAnalysisSupport.h:203: AnalysisType& llvm::Pass::getAnalysisID(const llvm::PassInfo*) const [with AnalysisType = llvm::LoopInfo]: Assertion `ResultPass &&

Hi all, I tried to have a LoopInfo object in a function pass, and add addRequired in getAnalysisUsage, and then use getAnalysis in runOnFunction(). It worked OK. Now I want to have a module pass to traverse the functions, and similarly, I want to have to loop information of the functions. When I did the above in runOnModule, and build the module pass, the following error popped out, and the

I want get some loop information(the methods are included in LoopInfo class) ,but when I use "const LoopInfo *LI=&getAnalysis<LoopInfo>()", I got a compiler error. the version of LLVM is 3.7.0. can anyone help me?please give me some example.thank you! -------------- next part -------------- An HTML attachment was scrubbed... URL:

hi, On Wed, Sep 15, 2010 at 8:21 PM, Mariusz Grad <mariusz.grad at gmail.com> wrote: > Hi, > > I wrote tiny ModulePass which iterates over functions and then uses getAnalysis<LoopInfo> in order to get informations about the loop. > It compiles smoothly, but whenever I try to run it I got error like this: > opt: .. PassAnalysisSupport.h:203: AnalysisType&

Hi all, I tried to have a LoopInfo object in a function pass, add addRequired<LoopInfo> in getAnalysisUsage, and then use getAnalysis<LoopInfo> in runOnFunction(). It worked OK. Now I want to have a module pass to traverse the functions, and similarly I want to have to loop information of the functions. When I did the above in runOnModule, and run the pass, the following error popped

Interesting that we're getting a relative flood of these recently. See here: http://lists.llvm.org/pipermail/llvm-dev/2019-March/131346.html I don't think one can reliably get a Function analysis pass from within a ModulePass using the legacy pass manager. You have to manually construct the pass yourself. -David Jonathan Smith via llvm-dev <llvm-dev at

1. Ok will do. 2. Ok, will do. 3. It's a CallGraphPass. I mentioned this in my first post. 4. Yep, I have the header files included, I'm not sure it would compile otherwise (previously). I would get an error like LoopInfo not declared. I'll try your suggestions, thanks again! On Thu, Nov 10, 2011 at 9:57 AM, John Criswell <criswell at illinois.edu>wrote: > On 11/10/11

Hi, I found that some loops can not be identified by LoopInfo pass. For example, the loop at line 3094 of rdopt.c of benchmark 464.h264ref from spec cpu2006 is not a loop or a child (pr grandchild) of any loop in the loop list generated by LoopInfo pass. The documentation of LoopInfo says that it identifies natural loops, who have exactly one entry point. But the IR of this loops shows that

Hi, I was looking at the LoopInfo Analysis pass as an example, and found it defined the isAnalysis() method to return true. I assumed the method was overriden from some superclass (Pass, probably) and present in all analysis passes. However, a better look turns out that the method isn't really used anywhere. PassInfo does define the same method which is used, but PassInfo is not a superclass

On Wed, Oct 3, 2012 at 2:33 AM, vinay m <mvinay05041990 at gmail.com> wrote: > Hi, > Is it possible to recreate the LoopInfo analysis in my pass? > No. You need your pass to be a FunctionPass in order to use the LoopInfo (and associated) analyses. > > Thanks , > Vinay > > On Wed, Oct 3, 2012 at 2:34 PM, Chandler Carruth <chandlerc at google.com>wrote:

The following code is causing an "UNREACHABLE executed!" and a stack dump, any ideas? namespace { struct myPass : public CallGraphSCCPass { static char ID; myPass() : CallGraphSCCPass(ID) {} virtual void getAnalysisUsage(AnalysisUsage &AU) const { AU.setPreservesAll(); AU.addRequired<LoopInfo>(); } virtual bool runOnSCC(CallGraphSCC &SCC)

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.