[LLVMdev] Extract Loop Failing

[Ryan Taylor]

      if (shouldExtractLoop) {
         if (ExtractLoop(DT, L, AggregateArgs) != 0) {
            errs()<<"Extracting, now deleting loop from queue\n";
            Changed = true;
            if (L->getParentLoop()) {
               LPM.deleteLoopFromQueue(L);
            }
            errs()<<"Extracting Loop
"<<L->getHeader()->getName().str()<<"\n";
         }
      }


On Thu, Jan 12, 2012 at 12:23 PM, Cameron Zwarich <zwarich at apple.com> wrote:

> How do you expect people to be able to tell you if you are using it
> properly if they can't see how you are using it?
>
> Cameron
>
> On Jan 12, 2012, at 12:22 PM, Ryan Taylor wrote:
>
> I'm not sure it's a bug. If I don't know if I am properly using it then
> how would I know it's a bug and not simply a user issue? If it sounds like
> a bug to you then I will file it. :)
>
> On Thu, Jan 12, 2012 at 12:18 PM, Cameron Zwarich <zwarich at apple.com>wrote:
>
>> Filing a bug with a test case would be a good start.
>>
>> Cameron
>>
>> On Jan 12, 2012, at 12:14 PM, Ryan Taylor <ryta1203 at gmail.com> wrote:
>>
>> It looks like this problem only exists on nested loops, ideas?
>>
>>
>> On Thu, Jan 12, 2012 at 11:44 AM, Ryan Taylor <ryta1203 at gmail.com> wrote:
>>
>>> Is it not a good idea to try and extract loops that have multiple exits?
>>>
>>>
>>> On Thu, Jan 12, 2012 at 10:44 AM, Ryan Taylor <ryta1203 at gmail.com>wrote:
>>>
>>>> I am trying to use ExtractLoop() but I am getting segFaults:
>>>>
>>>> 0  opt             0x00000000008edc2f
>>>> 1  opt             0x00000000008edfda
>>>> 2  libpthread.so.0 0x00007ffe21203c60
>>>> 3  opt             0x0000000000895ed9 llvm::Value::getName() const + 9
>>>> 4  LLVMEXITCDFG.so 0x00007ffe202b80d7
>>>> 5  opt             0x00000000006fc6e7
>>>> llvm::LPPassManager::runOnFunction(llvm::Function&) + 1143
>>>> 6  opt             0x0000000000882557
>>>> llvm::FPPassManager::runOnFunction(llvm::Function&) + 551
>>>> 7  opt             0x00000000008825db
>>>> llvm::FPPassManager::runOnModule(llvm::Module&) + 75
>>>> 8  opt             0x0000000000882197
>>>> llvm::MPPassManager::runOnModule(llvm::Module&) + 503
>>>> 9  opt             0x0000000000882299
>>>> llvm::PassManagerImpl::run(llvm::Module&) + 137
>>>> 10 opt             0x00000000004ac451 main + 4881
>>>> 11 libc.so.6       0x00007ffe204d9eff __libc_start_main + 255
>>>> 12 opt             0x000000000049f5f9
>>>> Stack dump:
>>>> 0.    Program arguments: opt -load
>>>> /home/ryan/llvm/llvm_core/llvm-2.9/Release/lib/LLVMEXITCDFG.so -exitPass
>>>> fix_fft.c.bc -o fix_fft.c.bc
>>>> 1.    Running pass 'Function Pass Manager' on module 'fix_fft.c.bc'.
>>>> 2.    Running pass 'Loop Pass Manager' on function '@fix_fft'
>>>> 3.    Running pass 'CDFG exitPass' on basic block '%bb3'
>>>> ./optScript.sh: line 46:  2637 Segmentation fault      opt -load
>>>> /home/ryan/llvm/llvm_core/llvm-2.9/Release/lib/LLVMEXITCDFG.so -exitPass
>>>> $1.bc -o ${1}.bc
>>>>
>>>> If I remove the "deleteLoopFromQueue" function call, it goes over all
>>>> the loops (supposedly extracting them) and then segFaults.
>>>>
>>>> How should I properly use this function?
>>>>
>>>
>>>
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>>
>>
>
>
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