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Re: Can offsetting a non-null pointer result in a null one?

From: Liu Hao <lh_mouse at 126 dot com>
To: Jeff Law <law at redhat dot com>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
Date: Wed, 15 Aug 2018 13:43:42 +0800
Subject: Re: Can offsetting a non-null pointer result in a null one?
References: <99f401a9-9419-819b-cbe0-b3b062c5372e@126.com> <5e7559a0-e774-052a-87a2-213a1024054e@redhat.com>

在 2018-08-15 12:48, Jeff Law 写道:

I just don't think anyone's ever bothered to catch this case.  I believe
there is a BZ which touches on this issue.


Yes, here it is: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78655

This PR uses a placement new as the example, which in GCC 8 assumes thepointer argument to `operator new()` is never null. But for a generalcase it is still not fixed.

So it looks like nobody has been working on this. I will just fix mycode then.

Jeff



--
Best regards,
LH_Mouse

Follow-Ups:
- Re: Can offsetting a non-null pointer result in a null one?
  - From: Richard Biener

References:
- Can offsetting a non-null pointer result in a null one?
  - From: Liu Hao
- Re: Can offsetting a non-null pointer result in a null one?
  - From: Jeff Law

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