[LLVMdev] InstVisitor usage problem

[Arnaud Allard de Grandmaison]

The opt invocation looks weird to me. I would expect something like:

opt -load /home/king/llvm/Release+Asserts/lib/instVisit.so -visitInst
load.bc

Cheers,
--
Arnaud


On Thu, Jan 9, 2014 at 1:49 PM, JinHuang <54jin.huang at gmail.com> wrote:

> Hi.All
> I had a problem in using llvm::InstVisitor class, my pass is like that:
>
> using namespace llvm;
>
> namespace
> {
>         class InstVisit : public ModulePass,
>                                                 public
> InstVisitor<InstVisit>
>         {
>                 public :
>                         static char ID;
>                         InstVisit():ModulePass(ID){}
>
>                         virtual bool runOnModule(Module &M)
>                         {
>                                 visit(M);
>                                 return false;
>                         }
>
>                         void visitStoreInst(StoreInst &SI)
>                         {
>                                 errs()<<"a store inst:"<<&SI<<"\n";
>                         }
>         };
>
>          char InstVisit::ID = 0;
>          static RegisterPass<InstVisit>
>                  X("visitInst","visit inst test");
> }
>
> then I use
> opt -load /home/king/llvm/Release+Asserts/lib/instVisit.so
> -visitInst<load.bc> /dev/null
> to run the pass. but it appears such errors:
>
> 0  opt             0x00000000012700d2 llvm::sys::PrintStackTrace(_IO_FILE*)
> + 34
> 1  opt             0x000000000126fd29
> 2  libpthread.so.0 0x00007f9ba0336bd0
> 3  instVisit.so    0x00007f9b9f33a200
> 4  opt             0x00000000012081ef
> llvm::MPPassManager::runOnModule(llvm::Module&) + 655
> 5  opt             0x0000000001209f7f
> llvm::PassManagerImpl::run(llvm::Module&) + 223
> 6  opt             0x000000000057e1ac main + 3772
> 7  libc.so.6       0x00007f9b9f55eea5 __libc_start_main + 245
> 8  opt             0x000000000058fe65
> Stack dump:
> 0.      Program arguments: opt -load
> /home/king/llvm/Release+Asserts/lib/instVisit.so -visitInst
> 1.      Running pass 'visit inst test' on module '<stdin>'.
> Segmentation fault (core dumped)
>
> the load.c is :
>
> int main() {
>   int x, y, z;
>
>   x = 12;
>   y = x + 22;  /* load value of x that was just stored */
>   z = y + 33;  /* load value of y that was just stored */
>   return z;
> }
>
> there is no stdin in the program .but why it says "Running pass 'visit inst
> test' on module '<stdin>'."
>
> Thank You!
>
> -JinHuang
>
>
>
>
> -----
> Kind Regards!
> -JinHuang
> --
> View this message in context:
> http://llvm.1065342.n5.nabble.com/InstVisitor-usage-problem-tp64909.html
> Sent from the LLVM - Dev mailing list archive at Nabble.com.
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