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Re: [PATCH]: Fix PR tree-optimization/21407
On May 11, 2005, at 5:25 AM, Kenneth Zadeck wrote:
I wonder, Mike, do you make any distinction between a c program
that upcasts on the first field of a record and one that uses the
offsetof operator to upcast from the middle of a record?
I don't, but Geoff does as I recall, which is I think what your
question was. As I recall, everyone agrees the C standard says the
first field is special, you can convert between the pointer to the
first field and the structure (I'm only considering struct here, not
[#12] Within a structure object, the non-bit-field members
and the units in which bit-fields reside have addresses that
increase in the order in which they are declared. A pointer
to a structure object, suitably converted, points to its
initial member (or if that member is a bit-field, then to
the unit in which it resides), and vice versa.