Re: Possible explanation why no segfault with -fno-delete-null-pointer-checks and -O2?Possible explanation why no segfault with -fno-delete-null-pointer-checks and -O2?

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To: A A <wempwer@xxxxxxxxx>, gcc-help@xxxxxxxxxxx
Subject: Re: Possible explanation why no segfault with -fno-delete-null-pointer-checks and -O2?Possible explanation why no segfault with -fno-delete-null-pointer-checks and -O2?
From: Andrew Haley <aph@xxxxxxxxxx>
Date: Tue, 03 Mar 2015 09:26:37 +0000
Authentication-results: sourceware.org; auth=none
In-reply-to: <CAKmQUfZQuu+UvhbPneYKiW_M1ePFbvHD+d0eWKZC_=425mqatg@mail.gmail.com>
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On 02/03/15 21:06, A A wrote:
> Anyone? Sorry for writing the same 2x times in the subject.

Why not?  Your code has undefined behaviour.  Read the code that GCC
generates.

Andrew.

References:
- Possible explanation why no segfault with -fno-delete-null-pointer-checks and -O2?Possible explanation why no segfault with -fno-delete-null-pointer-checks and -O2?
  - From: A A
- Re: Possible explanation why no segfault with -fno-delete-null-pointer-checks and -O2?Possible explanation why no segfault with -fno-delete-null-pointer-checks and -O2?
  - From: A A

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