CloneFunctionInto() Error

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1

Dear All,

I need your help urgently

I have to copy the CFG of each function using CloneFunction or CloneFunctionInto.

After I made the copy function. Print the basic blocks then get this error :

While deleting: i32 %
Use still stuck around after Def is destroyed: %mul2_ = mul nsw i32 %6, 3
Use still stuck around after Def is destroyed: store i32 3, i32* %x_, align 4
opt: Value.cpp:75: virtual llvm::Value::~Value(): Assertion `use_empty() && “Uses remain when a value is destroyed!”’ failed.
0 opt 0x0000000000fc7fe2
1 opt 0x0000000000fc8473
2 libpthread.so.0 0x00007f0396f43cb0
3 libc.so.6 0x00007f0396195425 gsignal + 53
4 libc.so.6 0x00007f0396198b8b abort + 379
5 libc.so.6 0x00007f039618e0ee
6 libc.so.6 0x00007f039618e192
7 opt 0x0000000000f7cd7d
8 opt 0x0000000000ee3c52
9 opt 0x0000000000f5bddf llvm::LLVMContextImpl::~LLVMContextImpl() + 1999
10 opt 0x0000000000f5ad1c
11 opt 0x0000000000fb9d69 llvm::llvm_shutdown() + 41
12 opt 0x00000000005285b3 main + 7251
13 libc.so.6 0x00007f039618076d __libc_start_main + 237
14 opt 0x0000000000521f91
Stack dump:
0. Program arguments: opt -load …/…/…/Release+Asserts/lib/Blocks.so -blocks
Aborted (core dumped)

***The code is

std::vector<Type*> ArgTypes;

ValueToValueMapTy VMap;

FunctionType *FTy = FunctionType::get(F.getFunctionType()->getReturnType(),
ArgTypes, F.getFunctionType()->isVarArg());

Function *NewF = Function::Create(FTy, F.getLinkage(), F.getName());

SmallVector<ReturnInst*, 8> Returns;

CloneFunctionInto(NewF, (Function*) &F, VMap, false, Returns, “_”, 0, 0);

Thanks in advance

2

Does cloning copies the function with its address or it constructs a new address to the new function? Is this real copying for the CFG or just opaque one to do some work?

If it’s not real copying, please I need a method that can help me in copying the function in another with new pointer to another address.

Please I need answer urgent

Thanks

3

After cloning you need to replace all the uses of original one with the cloned function.Probably you can use “replaceAllUsesWith( )” function to do this.


Regards,
Shahid


— On Wed, 5/29/13, Rasha Omar rasha.sala7@gmail.com wrote:


> From: Rasha Omar rasha.sala7@gmail.com
> Subject: Re: [LLVMdev] CloneFunctionInto() Error
> To: LLVMdev@cs.uiuc.edu
> Date: Wednesday, May 29, 2013, 5:23 AM
>
> Does cloning copies the function with its address or it constructs a new address to the new function? Is this real copying for the CFG or just opaque one to do some work?
>
> If it’s not real copying, please I need a method that can help me in copying the function in another with new pointer to another address.
>
> Please I need answer urgent
>
> Thanks
>
> On 29 May 2013 10:14, Rasha Omar rasha.sala7@gmail.com wrote:
>
> > Dear All,
> >
> > I need your help urgently
> >
> > I have to copy the CFG of each function using CloneFunction or CloneFunctionInto.
> >
> > After I made the copy function. Print the basic blocks then get this error :
> >
> > While deleting: i32 %
> > Use still stuck around after Def is destroyed: %mul2_ = mul nsw i32 %6, 3
> > Use still stuck around after Def is destroyed: store i32 3, i32* %x_, align 4
> > opt: Value.cpp:75: virtual llvm::Value::~Value(): Assertion `use_empty() && “Uses remain when a value is destroyed!”’ failed.
> > 0 opt 0x0000000000fc7fe2
> > 1 opt 0x0000000000fc8473
> > 2 libpthread.so.0 0x00007f0396f43cb0
> > 3 libc.so.6 0x00007f0396195425 gsignal + 53
> > 4 libc.so.6 0x00007f0396198b8b abort + 379
> > 5 libc.so.6 0x00007f039618e0ee
> > 6 libc.so.6 0x00007f039618e192
> > 7 opt 0x0000000000f7cd7d
> > 8 opt 0x0000000000ee3c52
> > 9 opt 0x0000000000f5bddf llvm::LLVMContextImpl::~LLVMContextImpl() + 1999
> > 10 opt 0x0000000000f5ad1c
> > 11 opt 0x0000000000fb9d69 llvm::llvm_shutdown() + 41
> > 12 opt 0x00000000005285b3 main + 7251
> > 13 libc.so.6 0x00007f039618076d __libc_start_main + 237
> > 14 opt 0x0000000000521f91
> > Stack dump:
> > 0. Program arguments: opt -load …/…/…/Release+Asserts/lib/Blocks.so -blocks
> > Aborted (core dumped)
> >
> > **The code is
> >
> > > std::vector<Type> ArgTypes;
> >
> > > ValueToValueMapTy VMap;
> >
> > >FunctionType FTy = FunctionType::get(F.getFunctionType()->getReturnType(),
> > ArgTypes, F.getFunctionType()->isVarArg());
> >
> > >Function NewF = Function::Create(FTy, F.getLinkage(), F.getName());
> >
> > > SmallVector<ReturnInst, 8> Returns;
> >
> > >CloneFunctionInto(NewF, (Function) &F, VMap, false, Returns, “_”, 0, 0);
> >
> > Thanks in advance
> >
> > –
> >
> > Rasha Salah Omar
> > Msc Student at E-JUST
> > Demonestrator at Faculty of Computers and Informatics
> > Benha University
>
> –
>
> Rasha Salah Omar
> Msc Student at E-JUST
> Demonestrator at Faculty of Computers and Informatics
> Benha University
>
> -----Inline Attachment Follows-----
>
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