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Re: representation of struct field offsets

From: Mark Mitchell <mark at codesourcery dot com>
To: Chris Lattner <clattner at apple dot com>
Cc: Sandra Loosemore <sandra at codesourcery dot com>, gcc at gcc dot gnu dot org
Date: Thu, 28 Sep 2006 15:38:25 -0700
Subject: Re: representation of struct field offsets
References: <451B2DA5.8070504@codesourcery.com> <451C33F8.6090900@codesourcery.com> <D9F9CDE8-279E-44EE-AB11-EC4C00994042@apple.com> <451C3776.1090007@codesourcery.com> <BC29F626-61E3-488C-AB89-9855FEBB3DA5@apple.com>

Chris Lattner wrote:

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 ?

I'm not sure -- but if it doesn't, it should. There are folks who like to make structures corresponding to the entire address space, and then poke at particular bytes by using fields.

--
Mark Mitchell
CodeSourcery
mark@codesourcery.com
(650) 331-3385 x713

References:
- representation of struct field offsets
  - From: Sandra Loosemore
- Re: representation of struct field offsets
  - From: Mark Mitchell
- Re: representation of struct field offsets
  - From: Chris Lattner
- Re: representation of struct field offsets
  - From: Mark Mitchell
- Re: representation of struct field offsets
  - From: Chris Lattner

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