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Wenbin Zhang

2011-Mar-03 22:04 UTC

[LLVMdev] how can I have LoopInfo in a module pass?

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
&& "Unable to find requested analysis info"' failed.

Did I miss something? Thanks!

Best,
--Wenbin
  ----- Original Message ----- 
  From: John Criswell 
  To: Wenbin Zhang 
  Cc: llvmdev at cs.uiuc.edu 
  Sent: Thursday, March 03, 2011 4:26 PM
  Subject: Re: [LLVMdev] how can I have LoopInfo in a module pass?


  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 did the above in
runOnModule, and run the pass, the following error popped out:

    AnalysisType& llvm::Pass::getAnalysis() const [with AnalysisType =
llvm::DominatorTree]: Assertion `Resolver && "Pass has not been
inserted into a PassManager object!"' failed.

    Can anyone tell me the correct way to handle this in a module pass? Thanks a
lot!

  LoopInfo is a FunctionPass, so you have to use getAnalysis<LoopInfo>(F)
where F is a pointer to the function that you want analyzed.

  Note that LoopInfo, in this instance, will be re-run every time you call
getAnalysis on it (this is a result of using a FunctionPass within a
ModulePass).  Be sure to structure you code to only call
getAnalysis<LoopInfo>(F) on each function just once, if possible.

  Also be sure that F is not a function declaration (i.e., a function with no
body).

  -- John T.



    Best,
    --Wenbin

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Wenbin Zhang

2011-Mar-03 22:26 UTC

head link

[LLVMdev] how can I have LoopInfo in a module pass?

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 cs.uiuc.edu 
  Sent: Thursday, March 03, 2011 5:04 PM
  Subject: Re: [LLVMdev] how can I have LoopInfo in a module pass?


  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
&& "Unable to find requested analysis info"' failed.

  Did I miss something? Thanks!

  Best,
  --Wenbin
    ----- Original Message ----- 
    From: John Criswell 
    To: Wenbin Zhang 
    Cc: llvmdev at cs.uiuc.edu 
    Sent: Thursday, March 03, 2011 4:26 PM
    Subject: Re: [LLVMdev] how can I have LoopInfo in a module pass?


    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 did the above in
runOnModule, and run the pass, the following error popped out:

      AnalysisType& llvm::Pass::getAnalysis() const [with AnalysisType =
llvm::DominatorTree]: Assertion `Resolver && "Pass has not been
inserted into a PassManager object!"' failed.

      Can anyone tell me the correct way to handle this in a module pass? Thanks
a lot!

    LoopInfo is a FunctionPass, so you have to use
getAnalysis<LoopInfo>(F) where F is a pointer to the function that you
want analyzed.

    Note that LoopInfo, in this instance, will be re-run every time you call
getAnalysis on it (this is a result of using a FunctionPass within a
ModulePass).  Be sure to structure you code to only call
getAnalysis<LoopInfo>(F) on each function just once, if possible.

    Also be sure that F is not a function declaration (i.e., a function with no
body).

    -- John T.



      Best,
      --Wenbin




------------------------------------------------------------------------------


  _______________________________________________
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  LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
  http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
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Wenbin Zhang

2011-Mar-03 23:03 UTC

head link

[LLVMdev] how can I have LoopInfo in a module pass?

Sorry for the spaming. I solved that problem, which is caused by my typo....
  ----- Original Message ----- 
  From: Wenbin Zhang 
  To: John Criswell 
  Cc: llvmdev at cs.uiuc.edu 
  Sent: Thursday, March 03, 2011 5:26 PM
  Subject: Re: [LLVMdev] how can I have LoopInfo in a module pass?


  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 cs.uiuc.edu 
    Sent: Thursday, March 03, 2011 5:04 PM
    Subject: Re: [LLVMdev] how can I have LoopInfo in a module pass?


    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
&& "Unable to find requested analysis info"' failed.

    Did I miss something? Thanks!

    Best,
    --Wenbin
      ----- Original Message ----- 
      From: John Criswell 
      To: Wenbin Zhang 
      Cc: llvmdev at cs.uiuc.edu 
      Sent: Thursday, March 03, 2011 4:26 PM
      Subject: Re: [LLVMdev] how can I have LoopInfo in a module pass?


      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 did the
above in runOnModule, and run the pass, the following error popped out:

        AnalysisType& llvm::Pass::getAnalysis() const [with AnalysisType =
llvm::DominatorTree]: Assertion `Resolver && "Pass has not been
inserted into a PassManager object!"' failed.

        Can anyone tell me the correct way to handle this in a module pass?
Thanks a lot!

      LoopInfo is a FunctionPass, so you have to use
getAnalysis<LoopInfo>(F) where F is a pointer to the function that you
want analyzed.

      Note that LoopInfo, in this instance, will be re-run every time you call
getAnalysis on it (this is a result of using a FunctionPass within a
ModulePass).  Be sure to structure you code to only call
getAnalysis<LoopInfo>(F) on each function just once, if possible.

      Also be sure that F is not a function declaration (i.e., a function with
no body).

      -- John T.



        Best,
        --Wenbin




----------------------------------------------------------------------------


    _______________________________________________
    LLVM Developers mailing list
    LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
    http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev



------------------------------------------------------------------------------


  _______________________________________________
  LLVM Developers mailing list
  LLVMdev at cs.uiuc.edu         http://llvm.cs.uiuc.edu
  http://lists.cs.uiuc.edu/mailman/listinfo/llvmdev
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