[LLVMdev] Accessing constant indexes in GetElementPtr

[Chris Lattner]

> be a constant of type UByte, and so it should cast to a ConstantUInt.
> (Operand 0 is not a special case, but it is always an array index so it
> sometimes may not be a constant.  Very often, though, it is the constant 0.)

One minor correction:  Operand #0 is the base pointer for the
getelementptr instruction, operand #1 (index #0) is what's being referred
to here...

-Chris

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