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Re: representation of struct field offsets
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. 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.
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Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713