[LLVMdev] Fwd: Extract Loop Failing

[Ryan Taylor]

---------- Forwarded message ----------
From: Ryan Taylor <ryta1203 at gmail.com>
Date: Thu, Jan 12, 2012 at 12:22 PM
Subject: Re: [LLVMdev] Extract Loop Failing
To: Cameron Zwarich <zwarich at apple.com>


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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