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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/107866] [12/13 Regression] gcc trunk's UBSan  misses
 a Null-pointer-dereference at -O3.
Date: Fri, 25 Nov 2022 10:40:47 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107866

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|gcc trunk's UBSan  misses a |[12/13 Regression] gcc
                   |Null-pointer-dereference at |trunk's UBSan  misses a
                   |-O3.                        |Null-pointer-dereference at
                   |                            |-O3.
   Target Milestone|---                         |12.3
                 CC|                            |rguenth at gcc dot gnu.org
           Priority|P3                          |P2

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
This isn't reported since r12-3918-g5b8b1522e04adc20980f396571be1929a32d148a
I wonder what is the point of -O3 -fsanitize=3Dundefined, -fsanitize=3D sev=
erely
slows down the code for instrumentation and at the same time you ask for as
many optimizations as possible.=