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Re: representation of struct field offsets
On Sep 28, 2006, at 1:58 PM, Mark Mitchell wrote:
Chris Lattner wrote:
An alternative design, which would save a field, is just to keep
the offset of a field, in bits, from the start of the structure.
Yes, that would also work. But, in many cases, you need the byte
offset, so there's a time/space tradeoff.
Yup, that's true.
Also, because of GCC's internal representation of integers, you
have to be careful that you have enough bits; for example, you need
72 bits to represent things in a 64-bit address space.
Actually, just 67, right? Does GCC support structures whose size is
greater than 2^61 ?
-Chris