[llvm-dev] llvm::PointerIntPair -- is this by design or a bug?

[Riyaz Puthiyapurayil via llvm-dev]

llvm::PointerIntPair<double*, 3, signed> P;

P.setInt(-4);



Ideally, the value range for a 3-bit signed integer should be [-4,3]. But the above call to setInt will fail. Essentially, the signed int field in PointerIntPair is behaving the same as an 3-bit unsigned field which has the legal value range of [0,7]. Is this by design? Are negative values not allowed in PointerIntPair?



/Riyaz
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