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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 target/112816] [11/12 Regression] ICE unrecognizable_insn with
 __builtin_signbit and returning struct with int[4]
Date: Sat, 16 Dec 2023 00:38:04 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D112816

--- Comment #13 from GCC Commits <cvs-commit at gcc dot gnu.org> ---
The releases/gcc-12 branch has been updated by Jakub Jelinek
<jakub@gcc.gnu.org>:

https://gcc.gnu.org/g:0246a37ebdef4ffc863fe4c56e812c0614026e02

commit r12-10052-g0246a37ebdef4ffc863fe4c56e812c0614026e02
Author: Jakub Jelinek <jakub@redhat.com>
Date:   Mon Dec 4 09:00:18 2023 +0100

    i386: Fix up signbit<mode>2 expander [PR112816]

    The following testcase ICEs, because the signbit<mode>2 expander uses an
    explicit SUBREG in the pattern around match_operand with register_opera=
nd
    predicate.  If we are unlucky enough that expansion tries to expand it
    with some SUBREG as operands[1], we have two nested SUBREGs in the IL,
    which is not valid and causes ICE later.

    2023-12-04  Jakub Jelinek  <jakub@redhat.com>

            PR target/112816
            * config/i386/sse.md (signbit<mode>2): Force operands[1] into a
REG.

            * gcc.target/i386/sse2-pr112816.c: New test.

    (cherry picked from commit 994d6dc64435d6b7c50accca9941ee7decd92a22)=