llvm dev - Jul 2009 - [LLVMdev] A beginner question

I feel a bit bad for always asking beginner questions here but I am having some
difficulties with a runtime error with which I could use some help diagnosing.

1) I am getting the assertion failure 

main: Type.cpp:1309: static llvm::PointerType* llvm::PointerType::get(const
llvm::Type*, unsigned int): Assertion `ValueType && "Can't get
a pointer to <null> type!"' failed.

from this line-

fields.push_back( llvm::PointerType::getUnqual(llvm::Type::Int32Ty) );

Is something needed to initialize the llvm::Type::Int32Ty?

Thanks in advance,

Carter

Carter Cheng wrote:
> I feel a bit bad for always asking beginner questions here but I am having
some difficulties with a runtime error with which I could use some help
diagnosing.
> 
> 1) I am getting the assertion failure 
> 
> main: Type.cpp:1309: static llvm::PointerType* llvm::PointerType::get(const
llvm::Type*, unsigned int): Assertion `ValueType && "Can't get
a pointer to <null> type!"' failed.
> 
> from this line-
> 
> fields.push_back( llvm::PointerType::getUnqual(llvm::Type::Int32Ty) );
> 
> Is something needed to initialize the llvm::Type::Int32Ty?
Type::Int32Ty is a static const Type* with an initializer. You might 
need static constructors to run in order to initialize it, but in C++ 
that should require no action on your part.

It should be impossible for that line of code to cause that assertion. 
Are you sure you're blaming the right line? If so then you probably have 
a larger problem with your C++ environment, such as LLVM being 
miscompiled by your system compiler. (It's not one of the ones listed on 
llvm.org/docs/GettingStarted.html#brokengcc is it?)

Nick

The line comes up on a back trace using gdb. I think it's the right line (I
have tried it on two separate machines one using Fedora 11 and g++ 4.4.x and the
other Ubunto and g++ 4.3.3) and the situation is exceptionally odd since it only
occurs when compiling my Runtime.cpp and doesnt happen when compiling other
files. This is with LLVM 2.5.

I did look at the Type.cpp code and it should be impossible but it's the
error I am getting.

--- On Sat, 7/4/09, Nick Lewycky <nicholas at mxc.ca> wrote:
> From: Nick Lewycky <nicholas at mxc.ca>
> Subject: Re: [LLVMdev] A beginner question
> To: "LLVM Developers Mailing List" <llvmdev at cs.uiuc.edu>
> Date: Saturday, July 4, 2009, 9:06 AM
> Carter Cheng wrote:
> > I feel a bit bad for always asking beginner questions
> here but I am having some difficulties with a runtime error
> with which I could use some help diagnosing. 
> > 
> > 1) I am getting the assertion failure 
> > 
> > main: Type.cpp:1309: static llvm::PointerType*
> llvm::PointerType::get(const llvm::Type*, unsigned int):
> Assertion `ValueType && "Can't get a pointer to
> <null> type!"' failed.
> > 
> > from this line-
> > 
> > fields.push_back(
> llvm::PointerType::getUnqual(llvm::Type::Int32Ty) );
> > 
> > Is something needed to initialize the
> llvm::Type::Int32Ty?
> 
> Type::Int32Ty is a static const Type* with an initializer.
> You might 
> need static constructors to run in order to initialize it,
> but in C++ 
> that should require no action on your part.
> 
> It should be impossible for that line of code to cause that
> assertion. 
> Are you sure you're blaming the right line? If so then you
> probably have 
> a larger problem with your C++ environment, such as LLVM
> being 
> miscompiled by your system compiler. (It's not one of the
> ones listed on 
> llvm.org/docs/GettingStarted.html#brokengcc is it?)
> 
> Nick
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