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Subject: [Bug analyzer/113333] [11/12/13 Regression] analyzer: False
 positives with calloc()
Date: Thu, 09 May 2024 17:11:53 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D113333

--- Comment #5 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-13 branch has been updated by David Malcolm
<dmalcolm@gcc.gnu.org>:

https://gcc.gnu.org/g:132eb1a210bc7806c4cf188ecac6c08339c94384

commit r13-8752-g132eb1a210bc7806c4cf188ecac6c08339c94384
Author: David Malcolm <dmalcolm@redhat.com>
Date:   Thu May 9 13:09:29 2024 -0400

    analyzer: casting all zeroes should give all zeroes [PR113333]

    In particular, accessing the result of *calloc (1, SZ) (if non-NULL)
    should be known to be all zeroes.

    (backported from commit r14-7265-gd235bf2e807c5f)

    gcc/analyzer/ChangeLog:
            PR analyzer/113333
            * region-model-manager.cc
            (region_model_manager::maybe_fold_unaryop): Casting all zeroes
            should give all zeroes.

    gcc/testsuite/ChangeLog:
            PR analyzer/113333
            * gcc.dg/analyzer/calloc-1.c: Add tests.
            * gcc.dg/analyzer/data-model-9.c: Update expected results.
            * gcc.dg/analyzer/pr96639.c: Update expected results.

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