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Re: [PATCH]: Fix PR tree-optimization/21407




Dale Johannesen wrote:
On May 10, 2005, at 9:46 AM, Daniel Berlin wrote:
On Tue, 2005-05-10 at 09:30 -0700, Mark Mitchell wrote:
Daniel Berlin wrote:
but if there's
no exemption for character pointers in that case, there should be, at
least in GNU C, where we assume unsegmented memory.

If i give you a pointer to a field, that would mean you could add or subtract bytes and legally get at any other member of the structure, containing structure, etc. I was told by Geoff Keating, and others, that this is not legal in C. Have I been misinformed? That would be quite sad.

There was quite a bit of discussion of this internal to Apple, and no
agreement was reached. Geoff strongly takes the position you say;
Mike and I disagree. The standard seems unclear.
I had this discussion at Apple with Geoff Keating and Mike Stump. When I left, they were on board with this. I would not have taken the time to do this if I thought I was bending the language. A never talked to Matt about this.


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