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Subject: [Bug tree-optimization/102908] [12 Regression]
 go.test/test/fixedbugs/issue16095.go hangs again by r12-4598
Date: Mon, 25 Oct 2021 12:09:39 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102908

--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Andrew Pinski <pinskia@gcc.gnu.org>:

https://gcc.gnu.org/g:7518e4c2f0758daac5d650d400565cf49ac3c8c5

commit r12-4661-g7518e4c2f0758daac5d650d400565cf49ac3c8c5
Author: Andrew Pinski <apinski@marvell.com>
Date:   Sat Oct 23 19:24:43 2021 +0000

    Fix PR 102908: wrongly removing null pointer loads

    Just like PR 100382, here we have a DCE removing a
    null pointer load which is needed still.
    In this case, execute_fixup_cfg removes a store (correctly)
    and then removes the null load (incorrectly) due to
    not checking stmt_unremovable_because_of_non_call_eh_p.
    This patch adds the check in the similar way as the patch
    to fix PR 100382 did.

    gcc/ChangeLog:

            * tree-ssa-dce.c (simple_dce_from_worklist):
            Check stmt_unremovable_because_of_non_call_eh_p also
            before removing the statement.=