llvm dev - May 2006 - [LLVMdev] TargetMachine::getTargetData

Hi,
in LLVM CVS the above methods returns pointer to TargetData. It used to
return a reference before. What is semantic of 0 return value? Or returning
0 is always a bug? If so, why pointer, and not reference is returned?

Thanks,
Volodya

On Sat, 13 May 2006, Vladimir Prus wrote:
> in LLVM CVS the above methods returns pointer to TargetData. It used to 
> return a reference before. What is semantic of 0 return value? Or 
> returning 0 is always a bug? If so, why pointer, and not reference is 
> returned?
We are currently in the process of making it optional, but right now it is 
required.  In practice, all targets will be *required* to provide it (it's 
hard to do much of anything without knowing how to lay out data :) ), but 
it will give us flexibility in the future, for mid-level passes that want 
to use data layout info if available, but gracefully degrade if not.

-Chris

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