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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug analyzer/108935] Incorrect warning for infinite recursion
Date: Wed, 01 Mar 2023 13:57:01 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108935

--- Comment #2 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by David Malcolm <dmalcolm@gcc.gnu.org>:

https://gcc.gnu.org/g:070523b9d4c6cfa69060255893006efaf39bf617

commit r13-6393-g070523b9d4c6cfa69060255893006efaf39bf617
Author: David Malcolm <dmalcolm@redhat.com>
Date:   Wed Mar 1 08:54:43 2023 -0500

    analyzer: fix infinite recursion false +ves [PR108935]

    gcc/analyzer/ChangeLog:
            PR analyzer/108935
            * infinite-recursion.cc (contains_unknown_p): New.
            (sufficiently_different_region_binding_p): New function, splitt=
ing
            out inner loop from...
            (sufficiently_different_p): ...here.  Extend detection of unkno=
wn
            svalues to also include svalues that contain unknown.  Treat
            changes in frames below the entry to the recursion as being
            sufficiently different to reject being an infinite recursion.

    gcc/testsuite/ChangeLog:
            PR analyzer/108935
            * gcc.dg/analyzer/infinite-recursion-pr108935-1.c: New test.
            * gcc.dg/analyzer/infinite-recursion-pr108935-1a.c: New test.
            * gcc.dg/analyzer/infinite-recursion-pr108935-2.c: New test.

    Signed-off-by: David Malcolm <dmalcolm@redhat.com>=