[LLVMdev] Bug in ExecutionEngine::getConstantValue() -- Instruction::PtrToInt

[Chris Lattner]

On Jul 25, 2009, at 11:17 AM, Aaron Gray wrote:

> I think I might have found a bug in the exection engine's 'constants  
> folding'.
>
> Basically APInt's parameters are the wrong way round.
>
> Line 577 for lib/ExecutionEngine/ExecutionEngine.cpp :-
>
>     case Instruction::PtrToInt: {
>       GenericValue GV = getConstantValue(Op0);
>       uint32_t PtrWidth = TD->getPointerSizeInBits();
>       GV.IntVal = APInt(PtrWidth, uintptr_t(GV.PointerVal));
>       return GV;
>     }
The code matches:

   APInt(unsigned numBits, uint64_t val, bool isSigned = false)

which is correct.

-Chris
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