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Re: [patch]: new returns misaligned pointers

To: Mark Mitchell <mark at codesourcery dot com>
Subject: Re: [patch]: new returns misaligned pointers
From: Jason Merrill <jason at cygnus dot com>
Date: 13 Nov 1999 11:43:42 -0800
Cc: rth at cygnus dot com, dnovillo at cygnus dot com, gcc-patches at gcc dot gnu dot org
References: <u9aeoin4x0.fsf@yorick.cygnus.com> <19991113011126Z.mitchell@codesourcery.com> <u94seqn2po.fsf@yorick.cygnus.com> <19991113092140S.mitchell@codesourcery.com>

>>>>> Mark Mitchell <mark@codesourcery.com> writes:

 > OK, so are we all agreed then that we should modify this patch so that
 > it only affects those programs that wouldn't have worked before anyhow
 > (because the first array element would have been misaligned)?

Yes.  I think that the right answer for the current ABI is to align the
cookie at MAX(alignof (double_type_node), alignof (array element type)).
For -fnew-abi, I think it can just be alignof (array element type).

Jason

Follow-Ups:
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References:
- Re: [patch]: new returns misaligned pointers
  - From: Jason Merrill
- Re: [patch]: new returns misaligned pointers
  - From: Mark Mitchell
- Re: [patch]: new returns misaligned pointers
  - From: Jason Merrill
- Re: [patch]: new returns misaligned pointers
  - From: Mark Mitchell

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