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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 tree-optimization/111882] [13/14 Regression] : internal
 compiler error: in get_expr_operand in ifcvt with Variable length arrays and
 bitfields inside a struct
Date: Fri, 20 Oct 2023 16:03:36 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111882

--- Comment #4 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Andre Simoes Dias Vieira
<avieira@gcc.gnu.org>:

https://gcc.gnu.org/g:24cf1f600b8ad34c68a51f48884e72d01f729893

commit r14-4798-g24cf1f600b8ad34c68a51f48884e72d01f729893
Author: Andre Vieira <andre.simoesdiasvieira@arm.com>
Date:   Fri Oct 20 17:02:32 2023 +0100

    ifcvt: Don't lower bitfields with non-constant offsets [PR 111882]

    This patch stops lowering of bitfields by ifcvt when they have non-cons=
tant
    offsets as we are not likely to be able to do anything useful with those
during
    vectorization.  That also fixes the issue reported in PR 111882, which =
was
    being caused by an offset with a side-effect being lowered, but constan=
ts
have
    no side-effects so we will no longer run into that problem.

    gcc/ChangeLog:

            PR tree-optimization/111882
            * tree-if-conv.cc (get_bitfield_rep): Return NULL_TREE for
bitfields
            with non-constant offsets.

    gcc/testsuite/ChangeLog:

            * gcc.dg/vect/pr111882.c: New test.=