[llvm-dev] Unknown constant pointer type error when using BlockAddress

[Jeremy Lakeman via llvm-dev]

Are you mixing context objects? That might cause a weird issue like this.

On Sat, Nov 28, 2015 at 11:10 PM, AllenShow via llvm-dev <
llvm-dev at lists.llvm.org> wrote:

> Hi, all
>
> I try to run codes below to get a block address (not entry block)
>
> BasicBlock *bb = BasicBlock::Create(context, "label", func);
> Value *alloca = builder.CreateAlloca(builder.getInt8PtrTy(), 0);
> builder.CreateStore(BlockAddress::get(bb), alloca);
>
> But every time I get an error:
>
> Unknown constant pointer type!
> UNREACHABLE executed at /tmp/llvm20150903-18194-1kmlx72/llvm-3.6.2.src/lib/ExecutionEngine/ExecutionEngine.cpp:825!
> Abort trap: 6
>
> It is wired that this problem only happens if I use
> ExecutableEngine.runFunctionAsMain to run func
> If I dump my codes to a llvm IR file first and use llvm tool lli to run
> IR file, it works
>
> Is it a just-in-time problem ? I am confused.
>
> Thanks, Allen.
>
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