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From: "sjames at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/115056] [14/15 regression] False positive
 -Wstringop-overflow and -Warray-bounds
Date: Mon, 20 May 2024 07:39:33 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D115056

Sam James <sjames at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |88443, 56456
          Component|rtl-optimization            |middle-end
           Keywords|wrong-code                  |
            Summary|[14/15 regression]          |[14/15 regression] False
                   |Miscompilation (also        |positive
                   |triggering                  |-Wstringop-overflow and
                   |-Wstringop-overflow and     |-Warray-bounds
                   |-Warray-bounds warning)     |
                   |when -O2 or higher          |

--- Comment #11 from Sam James <sjames at gcc dot gnu.org> ---
Coming back to this: have you actually seen unexpected results from runtime
execution? (If so, please share what they were & what options you used to g=
et
them).

The warning is a problem but it doesn't necessarily imply bad codegen. Some
warnings have FPs based on the IR that gets generated.

i.e. I think this is a FP warning bug instead.


Referenced Bugs:

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D56456
[Bug 56456] [meta-bug] bogus/missing -Warray-bounds
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D88443
[Bug 88443] [meta-bug] bogus/missing -Wstringop-overflow warnings=