llvm dev - Jul 2012 - [LLVMdev] Intrinsic::getDeclaration causing dump() segfault

In the following scrap of code (pared down from actually useful code),
the func->dump() command segfaults iff the commented-out line is
uncommented.  This is with llvm 3.0.  I'm only dipping my toes into the
waters of llvm for the first time, and have no idea what I am doing
incorrectly.  In actual code, I would be wanting to call the memcpy
intrinsic eventually, of course.

int main(void)
{
    Module *module = new Module("testmod", getGlobalContext());
    FunctionType *ft = FunctionType::get(
        Type::getInt1Ty(getGlobalContext()), false);
    Function *func = Function::Create(ft, Function::ExternalLinkage,
                                      "", module);
    BasicBlock *bb = BasicBlock::Create(getGlobalContext(), "entry",
func);
    builder.SetInsertPoint(bb);
    builder.CreateRet(ConstantInt::getTrue(getGlobalContext()));
    // Value *memcpy = Intrinsic::getDeclaration(
    //     module, Intrinsic::memcpy, Type::getInt64Ty(getGlobalContext()));

    func->dump();

    delete module;

    return 0;
}


-- 
Michael Welsh Duggan
(md5i at md5i.com)

Hi Michael, when developing with LLVM you should always build LLVM with
assertions enabled, as then you get informative messages rather than
mysterious crashes.

Ciao, Duncan.
> In the following scrap of code (pared down from actually useful code),
> the func->dump() command segfaults iff the commented-out line is
> uncommented.  This is with llvm 3.0.  I'm only dipping my toes into the
> waters of llvm for the first time, and have no idea what I am doing
> incorrectly.  In actual code, I would be wanting to call the memcpy
> intrinsic eventually, of course.
>
> int main(void)
> {
>      Module *module = new Module("testmod", getGlobalContext());
>      FunctionType *ft = FunctionType::get(
>          Type::getInt1Ty(getGlobalContext()), false);
>      Function *func = Function::Create(ft, Function::ExternalLinkage,
>                                        "", module);
>      BasicBlock *bb = BasicBlock::Create(getGlobalContext(),
"entry", func);
>      builder.SetInsertPoint(bb);
>      builder.CreateRet(ConstantInt::getTrue(getGlobalContext()));
>      // Value *memcpy = Intrinsic::getDeclaration(
>      //     module, Intrinsic::memcpy,
Type::getInt64Ty(getGlobalContext()));
>
>      func->dump();
>
>      delete module;
>
>      return 0;
> }
>
>