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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/108854] [10 Regression] tbb-2021.8.0 fails on
 i686-linux (32-bit), internal compiler error: in expand_expr_real_1, at
 expr.c:10281 since r10-4511-g6cf67b62c8cda035dccac
Date: Wed, 03 May 2023 15:21:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D108854

--- Comment #19 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-10 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:f1789989ca265abaa246592cd4223cc3ca89b361

commit r10-11370-gf1789989ca265abaa246592cd4223cc3ca89b361
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Fri Feb 24 11:05:27 2023 +0100

    cgraphclones: Don't share DECL_ARGUMENTS between thunk and its artifici=
al
thunk [PR108854]

    The following testcase ICEs on x86_64-linux with -m32.  The problem is
    we create an artificial thunk and because of -fPIC, ia32 and thunk
    destination which doesn't bind locally can't use a mi thunk.
    The ICE is because during expansion to RTL we see SSA_NAME for a PARM_D=
ECL,
    but the PARM_DECL doesn't have DECL_CONTEXT of the current function.
    This is because duplicate_thunk_for_node creates a new DECL_ARGUMENTS c=
hain
    only if some arguments need modification.

    The following patch fixes it by copying the DECL_ARGUMENTS list even if
    the arguments can stay as is, to update DECL_CONTEXT on them.  While for
    mi thunks it doesn't really matter because we don't use those arguments
    in any way, for other thunks it is important.

    2023-02-23  Jakub Jelinek  <jakub@redhat.com>

            PR middle-end/108854
            * cgraphclones.c (duplicate_thunk_for_node): If no parameter
            changes are needed, copy at least DECL_ARGUMENTS PARM_DECL
            nodes and adjust their DECL_CONTEXT.

            * g++.dg/opt/pr108854.C: New test.

    (cherry picked from commit 2f1691be517fcdcabae9cd671ab511eb0e08b1d5)=