[LLVMdev] A question about the BasicBlock::hasAddressTaken() implementation.

[Paul Vario]

Hi Fellows,

    BasicBlock::hasAddressTaken has the following implementation:

              bool hasAddressTaken() const { return
getSubclassDataFromValue() != 0; }

     and then, in llvm/IR/Value.h, we have

               unsigned short getSubclassDataFromValue() const { return
SubclassData; }

     But it's not clear to me at all, how is (SubclassData != 0) equivalent
to the basic block has its address taken? What's the logic behind all
these? Thanks so  much.


Best Regards,
Paul
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